Fixing device for gear hobbing of shaft parts
By using a pair of centers to fix the shaft in gear hobbing of shaft parts and setting rolling support structures at the guide rod and gear hobbing points, the vibration problem during gear hobbing of shaft parts is solved, and the machining quality and stability are improved.
Patent Information
- Application Number
- CN202520389364.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-06
AI Technical Summary
The lack of support compensation during gear hobbing of shaft parts leads to cutting chatter, which affects the quality of gear hobbing.
A pair of top-fixed shaft ends are used, and a rolling support structure is used to provide support at the shaft shaft and hobbing teeth. Ball bearings are used to provide rolling support for the shaft to avoid vibration.
It improves the stability and quality of gear hobbing of shafts, avoids the vibration problem of long shafts during gear hobbing, and ensures the stability and accuracy of machining.
Smart Images
Figure CN223833602U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shaft parts processing technology, and more specifically, to a fixing device for gear hobbing of shaft parts. Background Technology
[0002] Shafts are a common type of hardware component, primarily used to support transmission parts, transmit torque, and bear loads. Based on their structural form, shafts can generally be classified into three categories: plain shafts, stepped shafts, and irregularly shaped shafts; or, more specifically, solid shafts and hollow shafts. Currently, gear hobbing of shafts is typically performed on CNC gear hobbing machines. Gear hobbing mainly utilizes a hob to create textures on the shafts using the generating method.
[0003] Currently, when hobbing shaft parts (hereinafter referred to as shafts), the shafts are usually fixed on the hobbing machine using two tops (tops are centers) or one clamp and one top. However, when the shaft is long, the middle section lacks support compensation, which can easily cause cutting vibration during hobbing, thus reducing the quality of the hobbing. Utility Model Content
[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the technical problem of chattering during gear hobbing of shafts due to lack of support compensation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixing device for gear hobbing of shaft parts, comprising a pair of bases mounted on a gear hobbing machine, each base having a support plate fixedly connected to it. Each pair of support plates has a center on its opposite surface, and a shaft is mounted on each center. A slide rail is fixedly mounted on the pair of support plates, and a pair of connecting plates are slidably connected to the slide rail. One connecting plate has a second rolling support structure for supporting the guide rod of the shaft, and the other connecting plate has a first rolling support structure for supporting the gear hobbing of the shaft.
[0006] In a preferred embodiment, a rotary motor is fixedly connected to one of the support plates, the output end of the rotary motor passes through the support plate and is fixedly connected to one of the top points, a hydraulic rod is fixedly mounted on one of the support plates, the output end of the hydraulic rod is fixedly connected to a slide rod, the slide rod is slidably connected to another support plate, and another top point is rotatably connected to the end of the slide rod facing away from the hydraulic rod.
[0007] In a preferred embodiment, a slider is fixedly connected to the side of the connecting plate, and the slider is slidably connected within the slide rail.
[0008] In a preferred embodiment, a hydraulic rod II is fixedly mounted on each support plate, and a traction block is fixedly connected to the output end of the hydraulic rod II. A moving groove is provided on the side of the slide rail, and the traction block passes through the moving groove and is fixedly connected to the slider.
[0009] In a preferred embodiment, the rolling support structure II includes a pair of support ring plates II, and a plurality of ball bearings II are rotatably connected to the inner wall of each support ring plate II. The ball bearings II are movably connected to the smooth rod of the shaft.
[0010] In a preferred embodiment, each support ring plate 2 is bolted with a fixing arm 2, which is also bolted to the connecting plate.
[0011] In a preferred embodiment, the rolling support structure includes a pair of support ring plates, each of which has a plurality of balls rotatably connected to its inner wall, the balls being movably connected to the gear hobbing of the shaft.
[0012] In a preferred embodiment, each support ring plate is bolted with a fixing arm, which is also bolted to the connecting plate.
[0013] The technical effects and advantages of this utility model are as follows:
[0014] 1. The fixing device for gear hobbing of shaft parts consists of a pair of centers that fix the ends of the shaft, thus defining the end position of the shaft. Then, the rolling support structure 2 is moved to the smooth part of the shaft, and multiple balls 2 provide rolling support to the surface of the shaft. In this way, the balls 2 provide support and compensation for the gear hobbing of the shaft, so as to avoid the problem of chattering when the shaft is long. This can improve the progress and quality of gear hobbing of the shaft.
[0015] 2. The fixing device for hobbing shaft parts, by setting a rolling support structure, provides rolling support when the shaft part undergoes large-area hobbing along its length. This addresses the issue of the shaft part changing its surface shape due to the hobbing process. Rolling balls that are rolled in the tooth groove provide rolling support, which can further adapt to the support and compensation requirements of hobbing shaft parts and ensures high hobbing stability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a fixing device for gear hobbing of shaft parts according to the present invention.
[0017] Figure 2 This utility model Figure 1 Diagram showing the fit between the rolling support structure II and the shaft components;
[0018] Figure 3This is a diagram showing the fit between the tip and the shaft of this utility model;
[0019] Figure 4 This is a schematic diagram of the rolling support structure of this utility model;
[0020] Figure 5 This is a schematic diagram of the second rolling support structure of this utility model.
[0021] The attached diagram is labeled as follows: 1. Base; 2. Support plate; 3. Center point; 4. Shaft; 5. Slide rail; 6. Connecting plate; 7. Rolling support structure one; 71. Support ring plate one; 72. Ball bearing one; 8. Rolling support structure two; 81. Support ring plate two; 82. Ball bearing two; 9. Rotary motor; 10. Hydraulic rod one; 11. Slide rod; 12. Fixed arm one; 121. Fixed arm two; 13. Slider; 14. Hydraulic rod two; 15. Traction block. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] See also Figures 1-5 This utility model provides a fixing device for gear hobbing of shaft parts, including a pair of bases 1 set on a gear hobbing machine. The bases 1 can be bolted to the gear hobbing machine. Thus, the fixing device for gear hobbing of shaft parts of this application can be used on a gear hobbing machine to perform gear hobbing of shaft parts.
[0024] In this embodiment: each base 1 is fixedly connected to a support plate 2, and a top point 3 is provided on the opposite side of a pair of support plates 2, and a shaft 4 is provided on a pair of top points 3.
[0025] Shaft 4 is a shaft-type part. The support plate 2 can support the position of the top point 3. A pair of top points 3 can abut against the two ends of the shaft 4 for fixed support, that is, the two-top fixing method. In one embodiment, the shaft 4 can also adopt the one-clamp and one-top fixing method, the clamp is the fixture.
[0026] In this embodiment: a rotary motor 9 is fixedly connected to one of the support plates 2, the output end of the rotary motor 9 passes through the support plate 2 and is fixedly connected to one of the top points 3, a hydraulic rod 10 is fixedly mounted on one of the support plates 2, a slide rod 11 is fixedly connected to the output end of the hydraulic rod 10, the slide rod 11 is slidably connected to another support plate 2, and another top point 3 is rotatably connected to the end of the slide rod 11 facing away from the hydraulic rod 10.
[0027] In use, one end of the shaft 4 can be pre-aggregated against one end of a center 3. Then, the piston of the hydraulic rod 10 can be extended. The hydraulic rod 10 can cause the slide rod 11 to slide through the support plate 2. In this way, the slide rod 11 can drive another center 3 to act on the other end of the shaft 4. Since both centers 3 are rotating, the rotary motor 9 is started to drive one center 3 to rotate. In this way, the shaft 4 can rotate. The rotating shaft 4 can cooperate with the gear hobbing mechanism of the gear hobbing machine to perform feeding operations. In this application, the hydraulic rod 10 can be installed and connected by a support structure such as a plate or frame. The following installation can all be carried out using a support structure.
[0028] In this embodiment: a pair of support plates 2 are fixedly mounted with slide rails 5, a pair of connecting plates 6 are slidably connected to the slide rails 5, a slider 13 is fixedly connected to the side of the connecting plate 6, the slider 13 is slidably connected in the slide rail 5, a hydraulic rod 2 14 is fixedly mounted on each support plate 2, a traction block 15 is fixedly connected to the output end of the hydraulic rod 2 14, a moving groove is opened on the side of the slide rail 5, the traction block 15 passes through the moving groove and is fixedly connected to the slider 13.
[0029] The slider 13 is arranged in an isosceles trapezoidal structure, and the slide rail 5 is provided with a groove that matches the slider 13. The groove is connected to the moving groove. The moving groove is designed to allow the traction block 15 to pass through. In this way, the slider 13 can move stably along the length of the slide rail 5. Therefore, the slider 13 can drive the connecting plate 6 to move in position. The connecting plate 6 can provide movement capability for the structure on it. Therefore, by activating the hydraulic rod 14, the hydraulic rod 14 can control the linear movement of the traction block 15 by controlling the extension and retraction of the piston. In this way, the traction block 15 can provide movement power to the connecting plate 6 through the slider 13.
[0030] In this embodiment: one of the connecting plates 6 is provided with a rolling support structure 2 8 for supporting the smooth rod of the shaft 4. The rolling support structure 2 8 includes a pair of support ring plates 2 81. The inner wall of each support ring plate 2 81 is rotatably connected with a plurality of ball bearings 2 82. The ball bearings 2 82 are movably connected to the smooth rod of the shaft 4.
[0031] During use, when the shaft 4 is hobbing through the hobbing mechanism of the hobbing machine, the hydraulic rod 14 provides extension power to the traction block 15, the slider 13, and the connecting plate 6. The slider 13 slides stably within the slide rail 5, allowing the connecting plate 6 to move stably in a straight line. This allows the rolling support structure 8 on the connecting plate 6 to move towards the smooth rod area of the shaft 4. The support ring plate 81 provides support for the rotation of multiple balls 82. When a pair of support ring plates 81 move to the upper or lower position of the shaft 4, multiple balls 82 can roll on the smooth rod surface of the shaft 4 to provide a moving support effect. When the shaft 4 performs the rotating hobbing motion, the multiple balls 82 can provide support compensation for the shaft 4. With the help of a pair of centers 3 fixing the two ends of the shaft 4, the stability of the rotational support of the shaft 4 can be provided to avoid the problem of hobbing vibration caused by insufficient support compensation.
[0032] It is worth noting that when the rolling support structure 7 is not used, the rolling support structure 7 can be pushed to one side near one of the support plates 2 by the hydraulic rod 10, so that the rolling support structure 7 is located outside one of the top points 3. In this way, the rolling support structure 7 will not affect the gear hobbing of the shaft 4.
[0033] In this embodiment: each support ring plate 81 is bolted with a fixing arm 121, and the fixing arm 121 is also bolted to the connecting plate 6.
[0034] The fixed arm 2121 can connect and fix the support ring plate 281 and the connecting plate 6. The bolted fixed arm 2121 can easily disassemble and assemble the support ring plate 281.
[0035] In this embodiment: another connecting plate 6 is provided with a rolling support structure 7 for supporting the hobbing of the shaft 4. The rolling support structure 7 includes a pair of support ring plates 71. The inner wall of each support ring plate 71 is rotatably connected with a plurality of balls 72. The balls 72 are movably connected to the hobbing of the shaft 4.
[0036] During use, when the shaft 4 is hobbing through the hobbing mechanism of the hobbing machine, and when the shaft 4 is hobbing a large area along its length, such as the hobbing of knurled keys, the surface shape of the shaft 4 changes due to the hobbing process. At this time, a rolling support structure 8 can be accommodated. The hydraulic rod 14 provides extension power to the traction block 15, the slider 13, and the connecting plate 6. The slider 13 can make the connecting plate 6 move in a stable linear motion by sliding stably in the slide rail 5. In this way, the rolling support structure 7 on the connecting plate 6 can move towards the hobbing area of the shaft 4. The support ring plate 71 provides rotational support for multiple balls 72. The balls 72 roll into the groove of the hobbing process of the shaft 4, so the balls 72 can provide support compensation for the rotation of the shaft 4. With the help of a pair of centers 3 fixing the two ends of the shaft 4, the stability of the rotational support of the shaft 4 can be provided to avoid the problem of hobbing vibration caused by insufficient support compensation.
[0037] Therefore, rolling support structure 7 and rolling support structure 8 are used in combination to meet the support compensation requirements of the hobbing length of shaft 4, which is highly practical.
[0038] In this application, the size of ball 72 is smaller than that of ball 82 because ball 72 mainly rolls with the groove of the gear hobbing on the shaft 4, while ball 82 can directly roll with the outer surface of the smooth rod of the shaft 4.
[0039] In this embodiment: each support ring plate 71 is bolted with a fixing arm 12, and the fixing arm 12 is also bolted to the connecting plate 6.
[0040] The fixed arm 12 can connect and fix the support ring plate 71 and the connecting plate 6. The bolted fixed arm 12 can easily disassemble and assemble the support ring plate 71.
Claims
1. A fixing device for gear hobbing of shaft parts, comprising a pair of bases (1) mounted on a gear hobbing machine, characterized in that: Each base (1) is fixedly connected to a support plate (2), and each pair of support plates (2) is provided with a top point (3) on its opposite side. A shaft (4) is provided on the pair of top points (3). A slide rail (5) is fixedly mounted on the pair of support plates (2). A pair of connecting plates (6) are slidably connected on the slide rail (5). One of the connecting plates (6) is provided with a second rolling support structure (8) for supporting the smooth rod of the shaft (4), and the other connecting plate (6) is provided with a first rolling support structure (7) for supporting the hobbing gear of the shaft (4).
2. The fixing device for gear hobbing of shaft parts according to claim 1, characterized in that: A rotary motor (9) is fixedly connected to one of the support plates (2). The output end of the rotary motor (9) passes through the support plate (2) and is fixedly connected to one of the top points (3). A hydraulic rod (10) is fixedly mounted on one of the support plates (2). A slide rod (11) is fixedly connected to the output end of the hydraulic rod (10). The slide rod (11) is slidably connected to another support plate (2). Another top point (3) is rotatably connected to the end of the slide rod (11) facing away from the hydraulic rod (10).
3. The fixing device for gear hobbing of shaft parts according to claim 1, characterized in that: A slider (13) is fixedly connected to the side of the connecting plate (6), and the slider (13) is slidably connected inside the slide rail (5).
4. The fixing device for gear hobbing of shaft parts according to claim 3, characterized in that: Each support plate (2) is fixedly mounted with a hydraulic rod (14), and the output end of the hydraulic rod (14) is fixedly connected to a traction block (15). The side of the slide rail (5) is provided with a moving groove, and the traction block (15) passes through the moving groove and is fixedly connected to the slider (13).
5. A fixing device for gear hobbing of shaft parts according to claim 1, characterized in that: The rolling support structure 2 (8) includes a pair of support ring plates 2 (81), and each support ring plate 2 (81) has multiple ball bearings 2 (82) rotatably connected to its inner wall. The ball bearings 2 (82) are movably connected to the smooth rod of the shaft member (4).
6. A fixing device for gear hobbing of shaft parts according to claim 5, characterized in that: Each support ring plate 2 (81) is bolted with a fixing arm 2 (121), which is also bolted to the connecting plate (6).
7. A fixing device for gear hobbing of shaft parts according to claim 1, characterized in that: The rolling support structure (7) includes a pair of support ring plates (71), and each support ring plate (71) has a plurality of balls (72) rotatably connected to its inner wall. The balls (72) are movably connected to the hobbing teeth of the shaft (4).
8. A fixing device for gear hobbing of shaft parts according to claim 7, characterized in that: Each support ring plate (71) is bolted with a fixing arm (12), which is also bolted to the connecting plate (6).