A kind of anti-backlash device for broaching

Abstract

The utility model discloses a kind of for broaching processing's clearance elimination device, including mounting sleeve, the connecting sleeve being set in one side in mounting sleeve and the sliding cover being set in the other side in mounting sleeve and with connecting sleeve movably connected, first flat hole is equipped on the connecting sleeve, second flat hole is equipped in the sliding cover and first flat hole is communicated, position assembly is equipped on the connecting sleeve, and the corresponding position of sliding cover and position assembly abuts and limits position.The utility model sets up connecting sleeve, sliding cover and position assembly, in circumferential direction limit and keep the consistent of broach's play clearance, realize the purpose of eliminating processing gap and effectively controlling processing error.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a backlash elimination device for broaching. Background Technology

[0002] Currently, when broaching splines, the tool and fixture are usually circumferentially limited by a flat clearance fit. Due to the presence of the flat clearance, the tool's clamping angle changes each time, affecting the consistency of the spline angle of the broached product. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a backlash elimination device for broaching with convenient clamping and small positioning error.

[0004] To solve the above-mentioned technical problems, the present invention provides a backlash elimination device for broaching, comprising a mounting sleeve, a connecting sleeve disposed on one side inside the mounting sleeve, and a sliding cover disposed on the other side inside the mounting sleeve and movably connected to the connecting sleeve. The connecting sleeve has a first straight hole, and the sliding cover has a second straight hole communicating with the first straight hole. A positioning component is provided on the connecting sleeve, and the corresponding positions of the sliding cover and the positioning component abut and limit each other. When installing a broach, the broach shank passes through the two straight holes, and the shank drives the positioning component and the sliding cover to rotate and adhere to the shank, thereby eliminating the installation gap in the straight section.

[0005] Using the above structure, with the mounting sleeve as the fixed carrier, a connecting sleeve is fixedly installed inside the mounting sleeve as the fixed end during use, and the sliding cover as the movable end during use. The connecting sleeve is equipped with a compensation component. First, the broach is installed on the mounting sleeve in a state of 5° to 10° tilting and guidance through two straight holes. At this time, the corresponding positions of the sliding cover and the compensation component abut and limit the movement. During use, the broach shank and the sliding cover are in contact with the hole wall of the straight hole and are also subjected to the force of the compensation component. Under the premise of the same broaching force, the movement of the sliding cover can be kept consistent when processing products of the same specifications, that is, the processing gap can be kept consistent, so as to achieve the purpose of eliminating processing gap.

[0006] To simplify the structure and facilitate installation, preferably, one side of the mounting sleeve is provided with a positioning ring, and the end face inside the sliding cover abuts against the inner wall of the positioning ring for limiting the position; the other side of the mounting sleeve is screwed and fixed to the connecting sleeve.

[0007] To facilitate use and prevent the possibility of slippage, preferably, the outer wall of the sliding cover is fitted to the inner wall of the mounting sleeve, and a boss extending into the positioning ring is provided on one side of the sliding cover, with the outer wall of the boss fitted to the ring wall of the positioning ring.

[0008] To facilitate quick installation and simplify the structure, the replacement component preferably includes a placement groove symmetrically arranged on the connecting sleeve, a compression spring disposed in the placement groove, and a positioning protrusion disposed on the other side of the sliding cover corresponding to the placement groove position. The positioning protrusion extends into the placement groove, one side of the compression spring abuts against the groove wall of the placement groove, and the other side abuts against the extension end of the compression spring.

[0009] To ensure consistent movement to eliminate gaps and avoid interference, preferably, a clearance groove is provided on the sliding cover at the position corresponding to the placement groove. The clearance groove and the placement groove together form a cavity for placing the compression spring. In use, the positioning protrusion extends into the placement groove and squeezes the compression spring. The squeezed compression spring retracts and moves into the cavity.

[0010] To reduce the contact area and ensure smooth adaptive movement of the sliding cover, preferably, a positioning groove is provided on the sliding cover on the same side as the relief groove, and a steel ball is provided in the positioning groove. One side of the steel ball protrudes from the opening of the positioning groove, and the protruding end of the steel ball abuts against the inner wall of the connecting sleeve.

[0011] For ease of installation, preferably, one side of the connecting sleeve extends into the mounting sleeve, and a threaded hole is provided on the outer wall of the extended end of the connecting sleeve. A stepped hole is provided on the mounting sleeve at the position corresponding to the threaded hole. A bolt is inserted into the stepped hole, and the bolt is screwed into the threaded hole. The lower end face of the bolt nut abuts against the stepped surface of the stepped hole, so that the connecting sleeve and the mounting sleeve are connected and fixed.

[0012] To facilitate quick clamping and avoid clamping obstruction, preferably, a first transition slope is provided around the opening of the first straight hole, and a second transition slope is provided at the position corresponding to the straight section of the opening of the first straight hole, wherein the width of the second transition slope is greater than the width of the first transition slope.

[0013] To meet production needs, preferably, the included angle between the projected ends of the two straight holes is 5° to 10°.

[0014] Beneficial effects: This utility model is equipped with a connecting sleeve, a sliding cover, and a filling component, which restricts and keeps the movement gap of the broach in the circumferential direction consistent, thereby eliminating machining gaps and effectively controlling machining errors. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 AA section view in the image.

[0018] Figure 3 This is a structural diagram of the mounting sleeve.

[0019] Figure 4 This is a schematic diagram of the sliding cover.

[0020] Figure 5 for Figure 4 BB section view in the middle.

[0021] Figure 6 for Figure 4 CC section view in the image.

[0022] Figure 7 for Figure 4 DD section view in the image.

[0023] Figure 8 This is a schematic diagram of the connecting sleeve.

[0024] Figure 9 for Figure 8 EE section view in the image.

[0025] Figure 10 for Figure 8 FF section view in the image.

[0026] The meanings of the labels in the attached diagram are as follows:

[0027] Mounting sleeve-1; Positioning ring-11;

[0028] Connecting sleeve-2; placement groove-20; compression spring-21; bolt-22; first transition slope-23; second transition slope-24; first straight hole-25;

[0029] Sliding cover-3; Boss-30; Positioning boss-31; Relief groove-32; Positioning groove-33; Steel ball-34; Second straight hole-35. Detailed Implementation

[0030] Depend on Figures 1 to 10As shown, this utility model includes an installation sleeve 1, a connecting sleeve 2 disposed on one side inside the installation sleeve 1, and a sliding cover 3 disposed on the other side inside the installation sleeve 1 and movably connected to the connecting sleeve 2. The connecting sleeve 2 is provided with a first straight hole 25, and the sliding cover 3 is provided with a second straight hole 35 communicating with the first straight hole 25. The included angle between the projected ends of the two straight holes is 5° to 10°, preferably 5°. A matching component is provided on the connecting sleeve 2, and the corresponding position of the sliding cover 3 abuts and limits the corresponding position of the matching component. When installing the puller, the handle of the puller passes through the two straight holes. Due to the included angle between the projected positions of the two straight holes, the handle drives the matching component and the sliding cover 3 to rotate and adhere to the handle, thereby eliminating the installation gap at the straight section position.

[0031] Specifically, a positioning ring 11 is connected to one side of the mounting sleeve 1, and the end face inside the sliding cover 3 abuts against the inner wall of the positioning ring 11 for limiting; the mounting sleeve 1 is screwed to the connecting sleeve 2 on the other side; the outer wall of the sliding cover 3 is fitted against the inner wall of the mounting sleeve 1, and a boss 30 extending into the positioning ring 11 is provided on one side of the sliding cover 3, and the outer wall of the boss 30 is fitted against the ring wall of the positioning ring 11.

[0032] The replacement component includes a placement groove 20 symmetrically arranged on the connecting sleeve 2, a compression spring 21 disposed in the placement groove 20, and a positioning protrusion 31 disposed on the other side of the sliding cover 3 corresponding to the placement groove 20. The positioning protrusion 31 extends into the placement groove 20. One side of the compression spring 21 abuts against the groove wall of the placement groove 20, and the other side abuts against the extension end of the compression spring 21. A clearance groove 32 is provided on the sliding cover 3 at the position corresponding to the placement groove 20. The clearance groove 32 and the placement groove 20 together form a cavity for placing the compression spring 21. In use, the positioning protrusion 31 extends into the placement groove 20 and squeezes the compression spring 21. The squeezed compression spring 21 retracts and moves into the cavity.

[0033] The sliding cover 3 is provided with a positioning groove 33 on the same side as the relief groove 32. A steel ball 34 is provided in the positioning groove 33. One side of the steel ball 34 protrudes out of the groove opening of the positioning groove 33, and the protruding end of the steel ball 34 fits and abuts against the inner side wall of the connecting sleeve 2.

[0034] The connecting sleeve 2 extends into the mounting sleeve 1 on one side. A threaded hole is provided on the outer wall of the extending end of the connecting sleeve 2. A stepped hole is provided on the mounting sleeve 1 at the position corresponding to the threaded hole. A bolt 22 is inserted into the stepped hole. The bolt 22 is screwed into the threaded hole, and the lower end face of the nut of the bolt 22 abuts against the stepped surface of the stepped hole, so that the connecting sleeve 2 and the mounting sleeve 1 are connected and fixed.

[0035] A first transition slope 23 is provided around the opening of the first straight hole 25, and a second transition slope 24 is provided at the position corresponding to the straight section of the opening of the first straight hole 25. The slope width of the second transition slope 24 is greater than the slope width of the first transition slope 23.

[0036] The working principle of this utility model is as follows:

[0037] like Figures 1 to 8 As shown, before use, first place the compression spring 21 in the clearance groove 32, then place the steel ball 34 in the positioning groove 33, and then cover the sliding cover 3 from top to bottom with the connecting sleeve 2. At this time, the protruding end of the steel ball 34 fits and abuts against the lower end face of the connecting sleeve 2. At the same time, the two positioning protrusions 31 extend into the corresponding placement grooves 20 and abut against the end face of the corresponding end of the compression spring 21.

[0038] Next, as Figure 2 , Figure 8 and Figure 9 As shown, the connecting sleeve 2 and the sliding cover 3 are laid flat. The mounting sleeve 1 is inserted from one side of the connecting sleeve 2, and the outer wall of the sliding cover 3 is fitted with the inner wall of the mounting sleeve 1 and the positioning ring 11. The outer wall of the boss 30 is fitted with the ring wall of the positioning ring 11. Then, the bolt 22 is screwed into the threaded hole, and the lower end face of the nut of the bolt 22 abuts against the stepped surface of the stepped hole, so that the connecting sleeve 2 and the mounting sleeve 1 are connected and fixed. At this time, the included angle between the straight ends of the first straight hole 25 and the second straight hole 35 is 5°.

[0039] In use, first insert the handle of the broach into the second straight hole 35 of the sliding cover 3. Due to the projection angle, the handle needs to be rotated to rotate the sliding cover 3 counterclockwise. At this time, the two positioning protrusions 31 also simultaneously press the corresponding compression springs 21 counterclockwise. When the handle rotates to an angle of 5° between the straight ends of the two straight holes, the second straight hole 35 and the first straight hole 25 are fully connected. Then, move the handle of the broach into the first straight hole 25. At the same time, since the connecting sleeve 2 is fixedly connected, the first straight hole 25 remains fixed. Subsequently, the handle can be fixed in the axial direction. The axial fixing of the handle is the same as the existing clamping method, and will not be described again here.

[0040] During machining, the installation gap between the tool holder and the first straight hole 25 causes the tool holder to tend to move. However, the compression spring 21 placed in the symmetrically arranged relief groove 32 also generates an elastic reaction force when compressed. At the same time, the direction of the reaction force is opposite. Under the condition that the broaching force is the same, the force and reaction force formed by the gap movement cancel each other out and maintain the stability of the broach in the circumferential direction. That is, the broach movement gap is restricted and kept consistent in the circumferential direction, thereby achieving the purpose of eliminating broaching gap.

[0041] In this process, the two positioning protrusions 31 abut against the corresponding compression springs 21, which makes the two compression springs 21 more uniformly compressed in the circumferential direction and has a high consistency in the state of compression deformation.

[0042] In addition, such as Figure 8 and Figure 10 As shown, the length of the second transition slope 24 is greater than that of the first transition slope 23. When the tool holder is moved in, the movement interference in the straight section can be reduced, so as to achieve the purpose of quick clamping.

[0043] It should be noted that the axial fixing of the tool holder is the same as the existing clamping method, and is not included in the structural content and usage effect to be protected in this embodiment. Therefore, this prior art will not be described in detail here.

Claims

1. A backlash elimination device for broaching, characterized in that: The device includes a mounting sleeve (1), a connecting sleeve (2) located on one side inside the mounting sleeve (1), and a sliding cover (3) located on the other side inside the mounting sleeve (1) and movably connected to the connecting sleeve (2). The connecting sleeve (2) has a first straight hole (25), and the sliding cover (3) has a second straight hole (35) communicating with the first straight hole (25). The connecting sleeve (2) has a positioning component, and the corresponding position of the sliding cover (3) and the positioning component abuts and limits the device. When installing the puller, the handle of the puller passes through the two straight holes, and the handle drives the positioning component and the sliding cover (3) to rotate and stick to the handle, thereby eliminating the installation gap in the straight section.

2. The backlash elimination device for broaching as described in claim 1, characterized in that: The mounting sleeve (1) is connected to a positioning ring (11) on one side, and the end face inside the sliding cover (3) abuts against the inner wall of the positioning ring (11) for limiting the position; the mounting sleeve (1) is screwed to the connecting sleeve (2) on the other side.

3. The backlash elimination device for broaching as described in claim 2, characterized in that: The outer side wall of the sliding cover (3) is fitted to the inner side wall of the mounting sleeve (1). A boss (30) extending into the positioning ring (11) is provided on one side of the sliding cover (3). The outer side wall of the boss (30) is fitted to the ring wall of the positioning ring (11).

4. The backlash elimination device for broaching as described in claim 2, characterized in that: The replacement component includes a placement groove (20) symmetrically arranged on the connecting sleeve (2), a compression spring (21) arranged in the placement groove (20), and a positioning protrusion (31) arranged on the other side of the sliding cover (3) corresponding to the position of the placement groove (20). The positioning protrusion (31) extends into the placement groove (20), and one side of the compression spring (21) abuts against the groove wall of the placement groove (20), and the other side abuts against the extension end of the compression spring (21).

5. The backlash elimination device for broaching as described in claim 4, characterized in that: A clearance groove (32) is provided on the sliding cover (3) at the position corresponding to the placement groove (20). The clearance groove (32) and the placement groove (20) together form a cavity for placing the compression spring (21). When in use, the positioning protrusion (31) extends into the placement groove (20) and squeezes the compression spring (21). The squeezed compression spring (21) retracts and moves into the cavity.

6. The backlash elimination device for broaching as described in claim 5, characterized in that: The sliding cover (3) is provided with a positioning groove (33) on the same side as the relief groove (32). A steel ball (34) is provided in the positioning groove (33). One side of the steel ball (34) protrudes out of the groove opening of the positioning groove (33), and the protruding end of the steel ball (34) fits against the inner wall of the connecting sleeve (2).

7. The backlash elimination device for broaching as described in claim 3, characterized in that: One side of the connecting sleeve (2) extends into the mounting sleeve (1). A threaded hole is provided on the outer wall of the extending end of the connecting sleeve (2). A stepped hole is provided on the mounting sleeve (1) at the position corresponding to the threaded hole. A bolt (22) is inserted into the stepped hole. The bolt (22) is screwed into the threaded hole, and the lower end face of the nut of the bolt (22) abuts against the stepped surface of the stepped hole, so that the connecting sleeve (2) and the mounting sleeve (1) are connected and fixed.

8. The backlash elimination device for broaching as described in claim 1, characterized in that: A first transition slope (23) is provided around the opening of the first straight hole (25), and a second transition slope (24) is provided at the position corresponding to the straight section of the opening of the first straight hole (25). The slope width of the second transition slope (24) is greater than the slope width of the first transition slope (23).

9. The backlash elimination device for broaching as described in claim 1, characterized in that: The included angle between the projected ends of the two straight holes is 5° to 10°.

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