Gear shaft machining fixing device
By combining the design of the limiting groove, rear positioning block and front positioning component with the upper pressure plate and shock-absorbing rubber layer, the problems of rapid clamping and high-precision positioning in gear shaft machining are solved, thereby improving machining stability and equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏鑫和利精工有限公司
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-21
AI Technical Summary
Existing gear shaft machining fixtures cannot simultaneously meet the requirements of rapid clamping, high-precision positioning, and material universality. In particular, they are prone to vibration and axial displacement during high-speed machining, which affects machining accuracy and quality.
The gear shaft is initially positioned at both ends using a limiting groove, a rear positioning block, and a front positioning component. Then, pressure is applied by the upper pressure plate to fix it. Combined with a shock-absorbing rubber layer and a guide assembly, the stability and accuracy of the gear shaft during the processing are ensured.
It achieves accurate positioning and stable fixation of the gear shaft, reduces vibration and impact, improves machining accuracy and equipment stability, and extends service life.
Smart Images
Figure CN224143667U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of gear shaft machining, and in particular to a gear shaft machining fixing device. Background Technology
[0002] With the development of machining technology, gear shafts, as key components in power transmission, directly affect the performance of the entire transmission system due to their machining accuracy. Especially in high-precision gear shaft machining, the requirements for axial positioning accuracy are increasingly stringent, with the latest standards requiring axial positioning errors to be controlled within ±0.01mm. However, traditional clamping techniques such as three-jaw chucks are prone to radial deformation, while V-block positioning is insufficient to effectively limit axial movement. Particularly when CNC machine tool speeds exceed 8000rpm, the vibrations generated during machining further exacerbate the axial displacement problem.
[0003] Current solutions to these problems are as follows. For example, hydraulic expansion mandrels achieve high-precision positioning through a high-pressure oil chamber, with a positioning accuracy of ±0.005mm. However, this technology requires a matching hydraulic station for operation, resulting in a long single-part changeover time, exceeding 5 minutes. This not only affects processing efficiency but also increases maintenance costs. Furthermore, while double-center positioning has a simple structure, it cannot adapt to gear shafts of different diameters, and when the pressure applied by the centers is too high, it can damage the center hole of the gear shaft, leading to a decrease in quality. Another method is to use magnetic clamps, which use electromagnetic attraction to fix the gear shaft and allow for quick replacement. However, this technology is limited by materials, only suitable for gear shafts made of magnetically conductive materials, and has limited axial holding force, typically less than 200N.
[0004] In conclusion, although existing positioning technologies each have their advantages, none of them can simultaneously meet the requirements of rapid clamping, high-precision positioning, and universality of materials. Utility Model Content
[0005] In order to address the issue that current gear shaft machining fixing devices have inherent design characteristics, the inventors have found that while existing positioning technologies each have their advantages, none of them can simultaneously meet the requirements of rapid clamping, high-precision positioning, and universality of materials. Therefore, this application provides a gear shaft machining fixing device.
[0006] The gear shaft machining and fixing device provided in this application adopts the following technical solution: it includes a fixed base, a support seat fixedly disposed at the middle position of the upper end face of the fixed base, a limiting groove disposed on the upper end face of the support seat, mounting seats disposed on both sides of the support seat, a rotating shaft rotatably connected to the mounting seats, an upper pressure plate fixedly connected to the upper end face of the rotating shaft, a rear positioning block disposed on the rear end face of the support seat, and a front positioning member disposed on the front end face of the support seat. The limiting groove is used to place the gear shaft body.
[0007] By adopting the above technical solution, the two ends of the gear shaft are initially positioned by the limiting groove, the rear positioning block and the front positioning component, and then the upper end is fixed by applying pressure with the upper pressure plate, so as to ensure that the gear shaft is stable and does not shift during the entire processing, thereby ensuring processing accuracy and quality.
[0008] As a preferred embodiment, the limiting groove is configured as a "U" shape, and the inner wall of the limiting groove is provided with a shock-absorbing rubber layer.
[0009] By adopting the above technical solution, the gear shaft body is placed within a "U"-shaped limiting groove, and the fixing effect of the limiting groove ensures its stability and reliability during movement. The shock-absorbing rubber layer further weakens the impact of alternating loads on the gear shaft, improving the overall stability and safety of the device. This structure not only ensures the accurate positioning of the gear shaft body but also enhances the system's toughness when encountering external impacts, effectively reducing vibration and impact.
[0010] As a preferred embodiment, four upper pressure plates are provided, and each upper pressure plate is also provided with a shock-absorbing rubber layer on its lower end surface.
[0011] By adopting the above technical solution, four upper pressure plates are configured, each with a layer of shock-absorbing rubber laid on its lower end surface. The function of the upper pressure plates is to press the workpiece with evenly distributed pressure, ensuring processing accuracy and quality; the shock-absorbing rubber layer effectively absorbs and disperses transmitted vibrations and impacts, reducing damage to the equipment and workpiece, and improving the stability and service life of the equipment. The four upper pressure plates work together to apply pressure evenly, and the addition of the shock-absorbing rubber layer greatly reduces the vibration of the equipment during operation, improving the stability of the processing and the quality of the product.
[0012] As a preferred embodiment, a fixing screw is provided between the rear positioning block and the fixed base, and the fixing screw passes through the rear positioning block and the fixed base to connect them.
[0013] By adopting the above technical solution, the function of the fixing screw is to firmly fix the rear positioning block to the fixed base. The tightening of the screw enhances the connection strength between the rear positioning block and the fixed base, thereby ensuring the stability and reliability of positioning.
[0014] As a preferred embodiment, the front positioning component includes a fixed base fixedly connected to the fixed base, a push rod slidably connected to the fixed base, a movable plate disposed at one end of the push rod relative to the support base, a positioning rod fixedly disposed on the movable plate relative to the support base and coaxially disposed with the limiting groove, a protective column head disposed at one end of the positioning rod away from the movable plate, a guide assembly for guiding the movement direction of the movable plate, and an adjusting spring disposed on the outer periphery of the push rod. The protective column head is made of vulcanized polyurethane rubber, and the positioning rod is fixedly connected to the movable plate.
[0015] By adopting the above technical solution, the push rod can move linearly within the fixed seat through a sliding connection with the fixed seat, facilitating external force control of position changes; the movable plate is installed at one end of the push rod and moves synchronously with it, thereby realizing the displacement of the positioning rod; the positioning rod is fixedly set on the movable plate and coaxial with the limiting groove, used to cooperate with the limiting groove to complete precise positioning; the protective column head is made of vulcanized polyurethane rubber material, which has good buffering and wear resistance properties, and can protect the fixed parts from damage during positioning; the guide assembly provides directional guidance for the movement of the movable plate, ensuring that it moves accurately along the predetermined path; the adjusting spring is sleeved on the outer periphery of the push rod, which can provide restoring force, so that the movable plate can automatically return to its position when no external force is applied.
[0016] As a preferred embodiment, one end of the adjusting spring is fixedly connected to the fixed base, and the other end of the adjusting spring is fixedly connected to one side of the movable plate relative to the fixed base.
[0017] By employing the above technical solution, the adjusting spring applies the reset force, ensuring that the protective pin tightly adheres to the shaft end of the gear shaft body. The movable plate moves under the action of external force. Specifically, when the push rod is pulled backward, the movable plate moves backward, compressing the adjusting spring and providing power for subsequent reset. After the shaft end of the gear shaft body contacts the protective pin, once the push rod is released, the adjusting spring, through its own restoring elastic force, pushes the movable plate, ensuring the protective pin tightly adheres to the shaft end of the gear shaft body, enhancing sealing and protective effects.
[0018] As a preferred embodiment, the guide assembly includes a linear slide rail integrally formed with the fixed base and a slider disposed on the lower end face of the movable plate and adapted to the linear slide rail, the slider being fixedly connected to the lower end face of the movable plate.
[0019] By adopting the above technical solution, the linear slide rail is a fixed structure that provides a stable guiding path; the slider, as a moving part, is tightly integrated with the linear slide rail, enabling the moving plate to move precisely and stably along a predetermined path under the guidance of the linear slide rail, effectively avoiding shaking and deviation during the movement.
[0020] In summary, this application includes the following beneficial technical effects:
[0021] 1. The limiting groove facilitates precise placement and positioning of the gear shaft body; the mounting base and rotating shaft form a rotational support, ensuring that the upper pressure plate can be flexibly adjusted in position;
[0022] 2. The upper pressure plate is connected to the mounting base via a rotating shaft, and is fixed by applying pressure to the upper end face of the gear shaft; the rear positioning block and the front positioning part respectively position one end and the other end of the gear shaft, enhancing the overall fixing stability. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of the gear shaft machining and fixing device of this application;
[0024] Figure 2 This is a schematic diagram of the rear positioning component in the gear shaft machining fixing device of this application;
[0025] Figure 3 It is the gear shaft machining fixing device in this application Figure 2 Another structural diagram from a different perspective;
[0026] Figure 4 It is the gear shaft machining fixing device in this application Figure 2 A schematic diagram of the structure in a partial half-section view;
[0027] Figure 5 It is the gear shaft machining fixing device in this application Figure 4 A structural schematic diagram of the enlarged view at point A.
[0028] Explanation of reference numerals in the attached drawings: 100, gear shaft body; 1, fixed base; 2, support seat; 21, limiting groove; 3, upper pressure plate; 31, mounting seat; 311, rotating shaft; 4, front positioning plate; 51, fixed seat; 52, movable plate; 520, slider; 521, positioning rod; 5211, protective column head; 53, push rod; 531, adjusting spring; 54, linear slide rail. Detailed Implementation
[0029] The present application will be further described in detail below with reference to the accompanying drawings.
[0030] Please refer to the details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This application discloses a gear shaft machining and fixing device. It includes a fixed base 1, a support seat 2 fixedly disposed at the center of the upper end face of the fixed base 1, a limiting groove 21 disposed on the upper end face of the support seat 2, mounting seats 31 disposed on both sides of the support seat 2, a rotating shaft 311 rotatably connected to the mounting seats 31, an upper pressure plate 3 fixedly connected to the upper end face of the rotating shaft 311, a rear positioning block disposed on the rear end face of the support seat 2, and a front positioning component disposed on the front end face of the support seat 2. The limiting groove 21 is used to place the gear shaft body 100. The limiting groove 21, the rear positioning block, and the front positioning component provide initial positioning for both ends of the gear shaft. The upper pressure plate 3 then applies pressure to fix the upper end, ensuring the gear shaft remains stable and without displacement throughout the machining process, thereby guaranteeing machining accuracy and quality.
[0031] Please refer to the details. Figure 2 , Figure 3 , Figure 4 and Figure 5 The limiting groove 21 is U-shaped, and its inner wall is lined with a shock-absorbing rubber layer. The gear shaft body 100 is placed within the U-shaped limiting groove 21, and the fixing effect of the limiting groove 21 ensures its stability and reliability during movement. The shock-absorbing rubber layer further reduces the impact of alternating loads on the gear shaft, improving the overall stability and safety of the device. This structure not only ensures the accurate positioning of the gear shaft body 100 but also enhances the system's toughness when encountering external impacts, effectively reducing vibration and impact.
[0032] Please refer to the details. Figure 1 Four upper pressure plates 3 are configured, and each upper pressure plate 3 has a damping rubber layer on its lower end surface. The function of the upper pressure plates 3 is to press the workpiece with evenly distributed pressure, ensuring processing accuracy and quality; the damping rubber layer effectively absorbs and disperses transmitted vibrations and impacts, reducing damage to the equipment and workpiece, and improving the stability and service life of the equipment. The four upper pressure plates 3 work together to apply pressure evenly, and the damping rubber layer greatly reduces the vibration of the equipment during operation, improving the stability of the processing and the quality of the product.
[0033] Please refer to the details. Figure 1 and Figure 2 A fixing screw is provided between the rear positioning block and the fixed base 1. The fixing screw passes through the rear positioning block and connects the fixed base 1. The function of the fixing screw is to firmly fix the rear positioning block on the fixed base 1. By tightening the screw, the connection strength between the rear positioning block and the fixed base 1 is enhanced, thereby ensuring the stability and reliability of positioning.
[0034] Please refer to the details. Figure 2 , Figure 3, Figure 4 and Figure 5 The front positioning component includes a fixed base 51 fixedly connected to the fixed base 1, a push rod 53 slidably connected to the fixed base 51, a movable plate 52 disposed at one end of the push rod 53 relative to the support base 2, a positioning rod 521 fixedly disposed on the movable plate 52 relative to the support base 2 and coaxially disposed with the limiting groove 21, a protective column head 5211 disposed at the end of the positioning rod 521 away from the movable plate 52, a guide assembly for guiding the movement direction of the movable plate 52, and an adjusting spring 531 disposed on the outer periphery of the push rod 53. The protective column head 5211 is made of vulcanized polyurethane rubber. The positioning rod 521 is fixedly connected to the movable plate 52. The push rod 53 can move within the fixed base 51 through a slidable connection with the fixed base 51. The movable plate 52 moves linearly, facilitating external force control of position changes. It is mounted on one end of the push rod 53 and moves synchronously with it, thus displacing the positioning rod 521. The positioning rod 521 is fixedly mounted on the movable plate 52 and coaxial with the limiting groove 21, used to cooperate with the limiting groove 21 for precise positioning. The protective column head 5211 is made of vulcanized polyurethane rubber, possessing excellent cushioning and wear resistance, protecting the fixed component from damage during positioning. The guide assembly provides directional guidance for the movement of the movable plate 52, ensuring precise movement along a predetermined path. The adjusting spring 531 is sleeved on the outer circumference of the push rod 53, providing restoring force so that the movable plate 52 automatically returns to its original position when no external force is applied. The entire working principle involves external force pushing the push rod 53 to slide, causing the movable plate 52 to move, further extending the positioning rod 521 to cooperate with the limiting groove 21 for positioning. Simultaneously, the protective column head 5211 provides cushioning protection, the guide assembly ensures accurate movement, and the adjusting spring 531 provides the restoring force.
[0035] Please refer to the details. Figure 4 and Figure 5One end of the adjusting spring 531 is fixedly connected to the fixed base 51, and the other end of the adjusting spring 531 is fixedly connected to the side of the movable plate 52 opposite to the fixed base 51. The adjusting spring 531 is responsible for applying the reset force to ensure that the protective column head 5211 can tightly fit against the shaft end of the gear shaft body 100. The movable plate 52 moves under the action of external force. Specifically, when the push rod 53 is pulled backward, the movable plate 52 moves backward, compressing the adjusting spring 531, thereby providing power for subsequent reset. After the shaft end of the gear shaft body 100 contacts the protective column head 5211, once the push rod 53 is released, the adjusting spring 531 will push the movable plate 52 with its own elastic force to restore its original shape, so that the protective column head 5211 tightly fits against the shaft end of the gear shaft body 100, enhancing the sealing and protective effect. The working principle is as follows: by compressing the adjusting spring 531 with external tension, the elastic potential energy state of the spring is changed. After being released, the stored energy is used to automatically reset the protective column head 5211, achieving a tight fit and facilitating adjustment.
[0036] Please refer to the details. Figure 4 and Figure 5 The guide assembly includes a linear slide rail 54 integrally formed with the fixed base 51 and a slider 520 adapted to the linear slide rail 54 and disposed on the lower end face of the movable plate 52. The slider 520 is fixedly connected to the lower end face of the movable plate 52. The linear slide rail 54 is a fixed structure that provides a stable guide path. The slider 520 is a movable part that is tightly integrated with the linear slide rail 54, so that the movable plate 52 can move precisely and stably in a straight line along a predetermined path under the guidance of the linear slide rail 54, effectively avoiding shaking and deviation during the movement.
[0037] The implementation principle of the gear shaft processing and fixing device in this application embodiment is as follows: In use, the gear shaft body 100 is placed in the limiting groove 21, and one end of it is in contact with the front positioning plate 4. When the push rod 53 is pulled backward, the movable plate 52 is moved backward, which compresses the adjusting spring 531, thereby providing power for subsequent reset. After the shaft end of the gear shaft body 100 contacts the protective column head 5211, once the push rod 53 is released, the adjusting spring 531 will push the movable plate 52 with its own elastic force to restore its original state, so that the protective column head 5211 is tightly attached to the shaft end of the gear shaft body 100, enhancing the sealing and protective effect. In this process, the linear slide rail 54 is a fixed structure that provides a stable guiding path; the slider 520 is a movable part that is tightly combined with the linear slide rail 54, so that the movable plate 52 can move precisely and stably in a straight line along the predetermined path under the guidance of the linear slide rail 54, effectively avoiding shaking and deviation during the movement.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A gear shaft machining fixture, characterized by: It includes a fixed base (1), a support seat (2) fixedly disposed at the middle position of the upper end face of the fixed base (1), a limiting groove (21) disposed on the upper end face of the support seat (2), mounting seats (31) disposed on both sides of the support seat (2), a rotating shaft (311) rotatably connected to the mounting seat (31), an upper pressure plate (3) fixedly connected to the upper end face of the rotating shaft (311), a rear positioning block disposed on the rear end face of the support seat (2), and a front positioning member disposed on the front end face of the support seat (2). The limiting groove (21) is used to place the gear shaft body (100).
2. The gear shaft machining fixture according to claim 1, characterized in that: The limiting groove (21) is set in a "U" shape, and the inner wall of the limiting groove (21) is provided with a shock-absorbing rubber layer.
3. The gear shaft machining fixture of claim 2, wherein: The upper pressure plate (3) is provided in four parts, and each upper pressure plate (3) is also provided with a shock-absorbing rubber layer on its lower end surface.
4. The gear shaft machining fixture of claim 3, wherein: A fixing screw is provided between the rear positioning block and the fixed base (1), and the fixing screw passes through the rear positioning block and the fixed base (1) to connect them.
5. A gear shaft machining fixture as claimed in claim 4, wherein: The front positioning component includes a fixed base (51) fixedly connected to the fixed base (1), a push rod (53) slidably connected to the fixed base (51), a movable plate (52) disposed at one end of the push rod (53) relative to the support base (2), a positioning rod (521) fixedly disposed on the movable plate (52) relative to the support base (2) and coaxially disposed with the limiting groove (21), a protective column head (5211) disposed at one end of the positioning rod (521) away from the movable plate (52), a guide component for guiding the moving direction of the movable plate (52), and an adjusting spring (531) disposed on the outer periphery of the push rod (53).
6. The gear shaft machining fixing device according to claim 5, characterized in that: The protective column head (5211) is made of vulcanized polyurethane rubber, and the positioning rod (521) is fixedly connected to the movable plate (52).
7. A gear shaft machining fixture according to claim 6, wherein: One end of the adjusting spring (531) is fixedly connected to the fixed base (51), and the other end of the adjusting spring (531) is fixedly connected to one side of the movable plate (52) relative to the fixed base (51).
8. A gear shaft machining fixture according to claim 7, wherein: The guide assembly includes a linear slide rail (54) integrally formed with the fixed base (51) and a slider (520) adapted to the linear slide rail (54) on the lower end face of the movable plate (52), wherein the slider (520) is fixedly connected to the lower end face of the movable plate (52).