Stepless speed change bench drill

• US 6,779,952 B2
• Filed: 08/19/2002
• Issued: 08/24/2004
• Est. Priority Date: 09/20/2001
• Status: Expired due to Fees

• Current Assignee: Weidong Zhang
• Original Assignee: Weidong Zhang
• Inventors: Zhang, Weidong
• Primary Examiner(s): Howell, Daniel W.
• Assistant Examiner(s): Walsh, Brian D.
• Application Number:
  US10/223,314
• Publication Number:
  US 20030053871A1
• Time in Patent Office: 736 Days
• Field of Search: 408/6, 408/9, 408/16, 408/124, 408/128, 474/27, 474/59, 474/79, 474/87
• US Class Current: 408/128
• CPC Class Codes: B23Q 5/162 mechanically-operated
• CPC Class Codes: F16H 2009/166 Arrangements of two or more belt gearings mounted in series, e.g. for increasing ratio coverage
• CPC Class Codes: F16H 9/18 only one flange of each pulley being adjustable
• CPC Class Codes: Y10T 408/65 Means to drive tool
• CPC Class Codes: Y10T 408/67 Belt and pulley

Abstract

This invention relates to stepless speed change bench drill, comprising a pedestal, a vertical post mounted on the pedestal, a worktable and a cabinet mounted on the vertical post, a driving shaft and a main shaft mounted on the upper portion of the cabinet, a motor for transmitting power to the driving shaft, a motor movable wheel and a motor stationary wheel mounted on the driving shaft, and a main shaft movable wheel and a main shaft stationary wheel mounted on the main shaft, a speed regulation shaft provided with a threaded section and mounted between the driving shaft and the main shaft, the threaded section is engaged with a threaded hole formed on a bearing block, the bearing block is simultaneously mounted on the main shaft, the speed regulation shaft is rotated by a speed regulation hand wheel.

Claims

1. A stepless speed change bench drill, comprising:

a pedestal (19);

a vertical post (18) mounted on said pedestal (19);

a worktable (17) and a cabinet (16) which are mounted on said vertical post (18);

a driving shaft (2) and a main shaft (24) which are mounted on an upper portion of said cabinet (16);

a motor (1) for transmitting power to said driving shaft (2);

a motor movable wheel (4) and a motor stationary wheel (5) which are mounted on said driving shaft (2); and

a main shaft movable wheel (11) and a main shaft stationary wheel (12) which are mounted on said main shaft (24),

wherein a speed regulation device is provided between the driving shaft and the main shaft, said speed regulation device comprises a speed regulation shaft (9) provided with a threaded section (31), said threaded section (31) is engaged with a threaded hole (25) formed on a bearing block (10), said bearing block (10) is simultaneously mounted on the main shaft (24), said speed regulation shaft (9) is rotated by a speed regulation hand wheel (15).

2. The stepless speed change bench drill according to the claim 1, wherein a driven bevel gear (20) is mounted on the lower end of said speed regulation shaft (9), said driven bevel gear (20) is engaged with a driving bevel gear (23), said speed regulation hand wheel (15) is fixedly connected to the driving bevel gear (23).

3. The stepless speed change bench drill according to the claim 1, wherein A threaded hole (25) and an unthreaded hole (26) are provided on said bearing block (10).

4. The stepless speed change bench drill according to the claim 1, wherein a groove (27) is provided on the edge of said main shaft stationary wheel (12).

5. The stepless speed change bench drill according to the claim 1, wherein a digital display sensor (13) is mounted on the edge of said main shaft stationary wheel (12), said digital display sensor (13) is connected to a printed circuit board (30) via a lead (28), and a digital display screen (29) is connected to said printed circuit board (30).

6. The stepless speed change bench drill according to the claim 1, wherein a switch box (14) is mounted on said cabinet 16, and a display screen (29) is mounted on said switch box (14).

7. The stepless speed change bench drill according to the claim 1, wherein a shifting fork body (106) is mounted on said speed regulation shaft (9) of the speed regulation device, said shifting fork body (106) is connected to said speed regulation shaft (9) via thread, the lower shifting fork (35) of said shifting fork body (106) can be formed integrally with said shifting fork body (106), the upper shifting fork (105) is mounted on the upper end of said shifting fork body (106) by fastener.

8. The stepless speed change bench drill according to the claim 7, wherein said speed regulation device further comprises a transition means (100) mounted between said driving shaft (2) and said speed regulation shaft (9);

said transition means (100) comprises a middle shaft (110) mounted on said cabinet (16), a lower movable wheel (101), a stationary wheel set (102) and an upper movable wheel (103) which are mounted on said middle shaft (110);

a belt (7) is provided between said driving shaft (2) and said middle shaft (110), and between said middle shaft (110) and main shaft (24) is also provided a belt (71).

9. The stepless speed change bench drill according to the claim 8, wherein an upper shifting fork (105) of the shifting fork body (106) is mounted on an upper bearing block (104), and a lower shifting fork (35) of said shifting fork body (106) is mounted on a lower bearing block (107).

10. The stepless speed change bench drill according to the claim 8, wherein a digital display sensor (13) is mounted on the outer edge of said main shaft stationary wheel (12), said digital display sensor (13) is connected to a printed circuit board (30) via a lead (28), a digital display screen (29) is connected to said printed circuit board (30).