Gear clamping mechanism for a hobbing machine

Abstract

The application discloses a gear clamping mechanism of a gear hobbing machine, and relates to the technical field of gear machining.The gear clamping mechanism comprises a support in a C-shaped structure, a positioning assembly is installed on the inner side wall of the support, and a lower clamping assembly is installed on the positioning assembly.The positioning seat, the positioning block, the linkage rod, the rotating disc and the arc-shaped through hole are cooperatively arranged, one end of a gear blank is vertically placed between the four positioning blocks during use, then the first motor is started to drive the rotating disc to rotate, the linkage rod is pushed to move along the arc-shaped through hole to the center of the positioning seat under the joint action of the arc-shaped through hole and the inner wall of the sliding groove, thereby driving the four positioning blocks to synchronously slide towards each other, the center of the gear blank is pushed to the center position of the positioning seat, the positioning of the center of the gear blank is realized, and the problem that the existing clamping device cannot position the center of the gear during use, which may lead to inaccurate gear machining and seriously affect the production quality of the gear, is avoided as much as possible.

Description

Technical Field

[0001] This application relates to the field of gear processing technology, and in particular to a gear clamping mechanism for a gear hobbing machine. Background Technology

[0002] Gear hobbing machines are commonly used in gear processing, mainly for small-batch gear production. During the operation of the gear hobbing machine, the gear blank to be processed is clamped and fixed by a clamping device to facilitate cutting by the tool and ensure the accuracy of the gear during processing.

[0003] The utility model patent with announcement number CN203292622U proposes a gear clamping fixture for a gear hobbing machine, including a base, a column and at least two screws vertically arranged on the base, all screws being evenly distributed around the column, a pressure plate for pressing the outer and inner rings of the gear end face passing through the screws, a clamping nut located on the upper part of the pressure plate being threaded onto the screws, a sleeve for pressing the inner ring of the gear end face passing through the column and a pad located on the upper part of the sleeve, and a fastening nut located on the upper part of the pad being threaded onto the upper part of the column.

[0004] The clamping device described above cannot locate the center of the gear during use, which may lead to inaccurate gear machining and seriously affect the production quality of the gear. Utility Model Content

[0005] The purpose of this invention is to solve or at least alleviate the problem that existing clamping devices cannot locate the center of the gear during use, which may lead to inaccurate gear machining and seriously affect the production quality of the gear.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A gear clamping mechanism for a gear hobbing machine includes a C-shaped bracket. A positioning component is installed on the inner wall of the bracket, and a lower clamping component is installed on the positioning component. A driving device is fixedly connected to the top wall of the inner cavity of the bracket, and an upper clamping component is installed on the output end of the driving device. The positioning component includes a positioning seat fixedly connected to the inner wall of the bracket. Four sliding grooves are symmetrically opened on the upper surface of the positioning seat. A positioning block is slidably connected in each sliding groove. A linkage rod is vertically installed at the bottom of the end of the positioning block away from the center of the positioning seat. A turntable is rotatably connected in the inner cavity of the positioning seat. The turntable has four arc-shaped through holes distributed in a matrix. The bottom end of the linkage rod extends into the inner cavity of the corresponding arc-shaped through hole. A first motor for driving the turntable to rotate is also fixedly connected to the bottom wall of the bracket.

[0007] By adopting the above technical solution, during use, the user first places one end of the gear blank vertically on the clamping plate below the gap between the four positioning blocks. Then, the first motor is started to drive the turntable to rotate. When the turntable rotates, it can push the linkage rod along the arc-shaped through hole towards the center of the positioning seat under the combined action of the arc-shaped through hole and the inner wall of the slide groove. This drives the four positioning blocks to slide synchronously towards each other, pushing the center of the gear blank to the center position of the clamping plate, thus achieving the positioning of the center of the gear blank. After positioning, the user controls the hydraulic rod to extend, pushing the top of the gear blank to fit against the upper clamping plate, and continues to push the slide rod upward until the top of the slide rod abuts against the annular flange, achieving stable clamping of the gear blank. Then, the second motor is started to drive the gear blank to rotate, and the gear is hobbed by an external gear hobbing machine. This avoids the problem that existing clamping devices cannot position the center of the gear during use, which may lead to inaccurate gear processing and seriously affect the production quality of the gear.

[0008] Optionally, the lower clamping assembly includes a hydraulic rod fixedly connected to the center of the upper surface of the turntable, wherein the top height of the hydraulic rod in the retracted state is lower than the bottom height of the positioning block.

[0009] By adopting the above technical solution, a hydraulic rod is set up to position the gear blank and then push the gear blank upward, working together with the upper clamping assembly to clamp and fix the gear blank.

[0010] Optionally, a cylindrical protective cover is fixedly connected to the top wall of the inner cavity of the bracket. A rotating seat is embedded in the inner cavity at the bottom end of the protective cover. A guide groove is provided on the inner wall of the protective cover around the rotating seat. The rotating seat is rotatably connected to the inner wall of the protective cover through the guide groove.

[0011] By adopting the above technical solution, a protective cover is set up to install the rotating seat, and a guide groove is opened on the inner wall of the protective cover to guide the rotation of the rotating seat and prevent the rotating seat from deviating during the rotation process.

[0012] Optionally, the driving device is a second motor embedded in the inner cavity of the cover, with the tail of the second motor fixedly connected to the top of the bracket and the output end of the second motor fixedly connected to the center of the upper surface of the rotating seat.

[0013] By adopting the above technical solution, a second motor is set up to drive the rotation of the gear blank after it is clamped and fixed, which facilitates the subsequent gear hobbing operation on the gear blank.

[0014] Optionally, the upper clamping assembly includes a slide tube fixedly connected to the center of the lower surface of the rotary seat, a slide rod with a prism-shaped structure slidably connected to the bottom end of the slide tube, and a spring embedded in the inner cavity of the slide tube, with both ends of the spring fixedly connected to the slide rod and the inner wall of the slide tube, respectively.

[0015] By adopting the above technical solution, a slide tube and a slide rod are set up. After the gear blank is positioned, the hydraulic rod can be extended to push the gear blank upward, thereby moving the slide rod into the inner cavity of the slide tube and removing the gear blank from between the four positioning blocks, which facilitates gear hobbing of the gear blank.

[0016] Optionally, clamps are installed at one end of the slide rod outside the slide tube and at the top of the hydraulic rod. The two clamps are symmetrically arranged, and the centers of the two clamps are located on the same vertical line.

[0017] By adopting the above technical solution, the clamping plate at the top of the hydraulic rod is rotatably connected to the hydraulic rod, and the bottom end of the slide rod is fixedly connected to the clamping plate. The clamping plate is set to increase the contact surface with the end of the gear blank, thereby improving the stability of clamping the gear blank.

[0018] Optionally, an annular flange is fixedly connected to the inner wall of the middle section of the slide tube, and the distance between the annular flange and the bottom end of the slide tube is less than the maximum compression length of the spring.

[0019] By adopting the above technical solution, an annular flange is set to abut against one end of the slide rod located in the inner cavity of the slide tube after the slide rod slides up. The distance between the annular flange and the bottom end of the slide tube is less than the maximum compression length of the spring, which can minimize the problem of the slide rod excessively compressing the spring, causing the spring to deform and be damaged.

[0020] In summary, the beneficial effects of this application are as follows: This application utilizes a combination of a positioning seat, positioning blocks, a linkage rod, a turntable, and an arc-shaped through hole. In use, one end of the gear blank is placed vertically between the four positioning blocks. Then, the first motor is started, driving the turntable to rotate. Under the combined action of the arc-shaped through hole and the inner wall of the slide groove, the linkage rod moves along the arc-shaped through hole towards the center of the positioning seat. This causes the four positioning blocks to slide synchronously towards each other, pushing the center of the gear blank to the center position of the positioning seat, thus achieving precise positioning of the gear blank's center. This avoids the problem of existing clamping devices failing to position the gear's center during use, which could lead to inaccurate gear machining and seriously affect gear production quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this application; Figure 2 This is a schematic diagram of the connection structure of the positioning component in this application; Figure 3 This is a top view of the turntable in this application; Figure 4 This is a schematic diagram of the connection structure of the clamping component in this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Positioning seat; 3. Slide groove; 4. Positioning block; 5. Linkage rod; 6. Turntable; 7. Arc-shaped through hole; 8. First motor; 9. Hydraulic rod; 10. Protective cover; 11. Second motor; 12. Rotary seat; 13. Slide tube; 14. Slide rod; 15. Clamping plate; 16. Spring; 17. Annular flange. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0024] Please see Figure 1-3 A gear clamping mechanism for a gear hobbing machine includes a C-shaped bracket 1, on the inner side wall of which a positioning component is installed for positioning the center of the gear.

[0025] The positioning component is equipped with a lower clamping component, and a driving device is fixedly connected to the top wall of the inner cavity of the bracket 1. An upper clamping component is installed on the output end of the driving device. After the gear is positioned, the upper clamping component and the lower clamping component can clamp and fix the gear, and then the driving device drives the gear to rotate, which facilitates the subsequent gear hobbing.

[0026] The positioning component includes a positioning seat 2 fixedly connected to the inner wall of the bracket 1. Four sliding grooves 3 are symmetrically opened on the upper surface of the positioning seat 2, and a positioning block 4 is slidably connected in each sliding groove 3.

[0027] A linkage rod 5 is vertically installed at the bottom of the end of the positioning block 4 away from the center of the positioning seat 2. A turntable 6 is rotatably connected in the inner cavity of the positioning seat 2. Four arc-shaped through holes 7 are arranged in a matrix on the turntable 6. The bottom end of the linkage rod 5 extends into the inner cavity of the corresponding arc-shaped through hole 7.

[0028] A first motor 8 for driving the turntable 6 to rotate is also fixedly connected to the bottom wall of the bracket 1. When using it, the user can put the bottom end of the gear blank into the gap between the four positioning blocks 4, and then start the first motor 8 to drive the turntable 6 to rotate. When the turntable 6 rotates, it can push the linkage rod 5 along the arc-shaped through hole 7 towards the center of the positioning seat 2 under the combined action of the arc-shaped through hole 7 and the inner wall of the slide groove 3, thereby driving the four positioning blocks 4 to slide synchronously towards each other, pushing the center of the gear blank to the center position of the positioning seat 2, and realizing the positioning work of the center of the gear blank.

[0029] Reference Figure 1 The lower clamping assembly includes a hydraulic rod 9 fixedly connected to the center of the upper surface of the turntable 6. When the hydraulic rod 9 is in the retracted state, the top height is lower than the bottom height of the positioning block 4. The hydraulic rod 9 is used to position the gear blank and then push the gear blank upward to cooperate with the upper clamping assembly to clamp and fix the gear blank.

[0030] Reference Figure 1 A cylindrical protective cover 10 is fixedly connected to the top wall of the inner cavity of the bracket 1. A rotating seat 12 is embedded in the inner cavity at the bottom end of the protective cover 10. Guide grooves are formed on the inner wall of the protective cover 10 around the rotating seat 12. The rotating seat 12 is rotatably connected to the inner wall of the protective cover 10 through the guide grooves. The protective cover 10 is provided to install the rotating seat 12, and the guide grooves on the inner wall of the protective cover 10 are used to guide the rotation of the rotating seat 12 and prevent the rotating seat 12 from deviating during rotation.

[0031] Reference Figure 2 The driving device is a second motor 11 embedded in the inner cavity of the protective cover 10. The tail of the second motor 11 is fixedly connected to the top of the bracket 1, and the output end of the second motor 11 is fixedly connected to the center of the upper surface of the rotating seat 12. The second motor 11 is set to drive the rotation of the gear blank after it is clamped and fixed, which facilitates the subsequent gear hobbing operation on the gear blank.

[0032] Reference Figure 4 The upper clamping assembly includes a slide tube 13 fixedly connected to the center of the lower surface of the rotating seat 12. A prism-shaped slide rod 14 is slidably connected to the bottom end of the slide tube 13. A spring 16 is embedded in the inner cavity of the slide tube 13, and the two ends of the spring 16 are fixedly connected to the slide rod 14 and the inner wall of the slide tube 13, respectively. With the slide tube 13 and slide rod 14 in place, after the gear blank is positioned, the hydraulic rod 9 can be extended to push the gear blank upward, thereby moving the slide rod 14 into the inner cavity of the slide tube 13, and removing the gear blank from between the four positioning blocks 4, which facilitates gear hobbing of the gear blank.

[0033] Reference Figure 2 and Figure 4 A clamping plate 15 is installed at one end of the slide rod 14 outside the slide tube 13 and at the top of the hydraulic rod 9. The two clamping plates 15 are symmetrically arranged, and their centers are located on the same vertical line. The clamping plate 15 at the top of the hydraulic rod 9 is rotatably connected to the hydraulic rod 9, and the bottom end of the slide rod 14 is fixedly connected to the clamping plate 15. The clamping plate 15 is set to increase the contact surface with the end of the gear blank, thereby improving the stability of clamping the gear blank.

[0034] Reference Figure 3 An annular flange 17 is fixedly connected to the inner wall of the middle section of the slide tube 13. The distance between the annular flange 17 and the bottom end of the slide tube 13 is less than the maximum compression length of the spring 16. The annular flange 17 is provided to abut against the end of the slide rod 14 located in the inner cavity of the slide tube 13 after the slide rod 14 slides upward. The distance between the annular flange 17 and the bottom end of the slide tube 13 is less than the maximum compression length of the spring 16, which can minimize the problem of the slide rod 14 excessively compressing the spring 16, causing the spring 16 to deform and be damaged.

[0035] The implementation principle of this application is as follows: In use, the user first places one end of the gear blank vertically on the clamping plate 15 below the gap between the four positioning blocks 4, and then starts the first motor 8 to drive the turntable 6 to rotate. When the turntable 6 rotates, it can push the linkage rod 5 along the arc-shaped through hole 7 towards the center of the positioning seat 2 under the combined action of the arc-shaped through hole 7 and the inner wall of the slide groove 3, thereby driving the four positioning blocks 4 to slide synchronously towards each other, pushing the center of the gear blank to the center position of the clamping plate 15, thus realizing the positioning of the center of the gear blank. After positioning, the user controls the hydraulic rod 9 to extend, pushing the top of the gear blank to fit with the upper clamping plate 15, and continues to push the slide rod 14 upward until the top of the slide rod 14 abuts against the annular flange 17, realizing stable clamping of the gear blank. Then, the second motor 11 can be started to drive the gear blank to rotate, and the gear can be hobbed by an external gear hobbing machine. This avoids the problem that existing clamping devices cannot position the center of the gear during use, which may lead to inaccurate gear processing and seriously affect the production quality of the gear.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear clamping mechanism for a gear hobbing machine, comprising a C-shaped bracket (1), a positioning component mounted on the inner wall of the bracket (1), a lower clamping component mounted on the positioning component, a driving device fixedly connected to the top wall of the inner cavity of the bracket (1), and an upper clamping component mounted on the output end of the driving device, characterized in that: The positioning component includes a positioning seat (2) fixedly connected to the inner wall of the bracket (1). Four sliding grooves (3) are symmetrically opened on the upper surface of the positioning seat (2). A positioning block (4) is slidably connected in each of the sliding grooves (3). A linkage rod (5) is vertically installed at the bottom of the end of the positioning block (4) away from the center of the positioning seat (2). A turntable (6) is rotatably connected in the inner cavity of the positioning seat (2). Four arc-shaped through holes (7) are opened on the turntable (6) in a matrix distribution. The bottom end of the linkage rod (5) extends into the inner cavity of the corresponding arc-shaped through hole (7). A first motor (8) for driving the turntable (6) to rotate is also fixedly connected to the bottom wall of the bracket (1).

2. The gear clamping mechanism for a gear hobbing machine according to claim 1, characterized in that: The lower clamping assembly includes a hydraulic rod (9) fixedly connected to the center of the upper surface of the turntable (6). When the hydraulic rod (9) is in a retracted state, the height of its top end is lower than the height of the bottom end of the positioning block (4).

3. The gear clamping mechanism for a gear hobbing machine according to claim 1, characterized in that: A cylindrical protective cover (10) is fixedly connected to the top wall of the inner cavity of the bracket (1). A rotating seat (12) is embedded in the inner cavity at the bottom end of the protective cover (10). A guide groove is provided on the inner wall of the protective cover (10) around the rotating seat (12). The rotating seat (12) is rotatably connected to the inner wall of the protective cover (10) through the guide groove.

4. The gear clamping mechanism for a gear hobbing machine according to claim 3, characterized in that: The driving device is a second motor (11) embedded in the inner cavity of the cover (10). The tail of the second motor (11) is fixedly connected to the top of the bracket (1), and the output end of the second motor (11) is fixedly connected to the center of the upper surface of the rotating seat (12).

5. A gear clamping mechanism for a gear hobbing machine according to claim 1, characterized in that: The upper clamping assembly includes a slide tube (13) fixedly connected to the center of the lower surface of the rotating seat (12). The bottom end of the slide tube (13) is slidably connected to a slide rod (14) with a prism-shaped structure. A spring (16) is embedded in the inner cavity of the slide tube (13). The two ends of the spring (16) are fixedly connected to the slide rod (14) and the inner wall of the slide tube (13), respectively.

6. The gear clamping mechanism for a gear hobbing machine according to claim 5, characterized in that: The slide rod (14) is located at one end outside the slide tube (13), and the top of the hydraulic rod (9) is equipped with a clamp (15). The two clamps (15) are symmetrically arranged, and the centers of the two clamps (15) are located on the same vertical line.

7. A gear clamping mechanism for a gear hobbing machine according to claim 5, characterized in that: An annular flange (17) is fixedly connected to the inner wall of the middle section of the slide tube (13). The distance between the annular flange (17) and the bottom end of the slide tube (13) is less than the maximum compression length of the spring (16).

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