Gear machining clamp
By adopting a combined structure of mounting disc, mandrel, expansion block and preload block in the gear processing clamp, the problem of gear positioning and fixing in the prior art is solved, high-precision positioning and stable fixing are achieved, maintenance costs are reduced and structure and processing process are simplified.
Patent Information
- Application Number
- CN202421374361.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-13
AI Technical Summary
When locating and fixing gears, the hinge points are subjected to high pressure, which is prone to falling off or breaking, and has a complex structure, high processing difficulty, and high maintenance cost.
The structural design includes mounting plate, mandrel, expansion block and pre-tightening block. Through the combination of expansion block and pre-tightening block, the elasticity of the rubber expansion block and the guiding role of the tapered surface structure is used to achieve high-precision positioning and stable fixation of the gears.
It improves the positioning and installation accuracy and fixing stability of the gear, reduces maintenance and maintenance costs, simplifies the structure and processing process, avoids the pressure concentration of the hinge point, and enhances the reliability of the equipment.
Smart Images
Figure CN222818072U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear processing equipment, in particular to a gear processing fixture. Background Art
[0002] A gear refers to a mechanical element on a wheel rim that continuously meshes with gears to transmit motion and power. In the process of machining gear tooth grooves, a special fixture is needed to fix the gear to facilitate machining of the tooth grooves. Patent CN211614540U discloses a cylindrical gear machining fixture, which can support and fix the inner holes of cylindrical gears of different models by pushing the extension and retraction of the positioning clamp by a transmission screw. The specific working process is that the transmission rod slides inside the core shaft and then drives the connecting rod to rotate to realize the movement of the positioning clamp. However, the above-mentioned fixture has the following problems: the transmission rod and the connecting rod, the connecting rod and the positioning clamp, and the connecting rod and the inner wall of the core shaft are all hinged. When the positioning clamp extends out of the outer wall of the core shaft to support the inner hole of the gear, each hinge point will be subjected to greater pressure, and the hinge is prone to fall off, breakage, etc., which affects the fixation of the gear; on the other hand, when machining the core shaft, the connecting rod needs to be integrally machined and hinged to the inside of the core shaft, which has a complex structure and high machining difficulty, and is not easy to repair when there is a problem with the connecting rod or the positioning clamp, and the maintenance cost is high. Utility Model Content
[0003] The utility model aims to provide a gear processing fixture, which has the advantages of simple structure, convenient maintenance, low maintenance cost, high positioning and installation accuracy of the gear, and stable fixation.
[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a gear processing fixture, including a mounting plate, a coaxial mounting groove is opened in the middle of the mounting plate, the mounting groove is used to install a core shaft, one end of the core shaft is connected to the mounting groove, and the end is opened with a mounting cavity along its axial direction, a through hole connected to the mounting cavity is opened in the middle of the core shaft, a tightening block is placed in the through hole, a bearing is embedded in the bottom of the mounting groove, and a screw rod is rotatably connected through the bearing, one end of the screw rod extends into the mounting cavity and is threadedly connected to a pre-tightening block.
[0005] Furthermore, the other end of the core shaft is slidably sleeved with a gasket and a pressure ring in sequence from the end to the through hole. When the gear is processed, the gear is clamped between the gasket and the pressure ring, and one end face of the gasket is tightly attached to the end face of the mounting plate. The inner hole of the gear faces the expansion block in the through hole. This end of the core shaft is provided with an external thread and is threadedly connected with a fixing nut, and the fixing nut is fitted with the pressure ring.
[0006] Furthermore, the expansion block is made of rubber.
[0007] Furthermore, one side of the expansion block and both sides of the pre-tightening block are adapted conical structures.
[0008] Furthermore, the expansion blocks and the through holes are provided in plurality and are identical, the plurality of expansion blocks are arranged circumferentially, and the cross-section of the expansion blocks is fan-shaped to match the core shaft.
[0009] Furthermore, a limit block is provided at one end of the screw rod extending into the installation cavity.
[0010] Furthermore, one end of the screw rod outside the mounting cavity is connected to a reduction motor, and the reduction motor is mounted on the mounting platform.
[0011] Compared with the prior art, the advantages of the utility model are:
[0012] Before gear processing, first place the expansion block in the through hole, then insert the gasket on the mandrel, and make the gasket be located on the through hole to prevent the expansion block in the through hole from falling. At this time, you can move the gear again, insert the gear into the mandrel, and at the same time, move the inner hole of the gear to the through hole, and push the gasket to fit the end face of the mounting plate, then insert the pressure ring and screw in the fixing nut, apply axial pressure to the gear through the fixing nut to fix the gear to prevent axial movement during gear processing; after the fixing nut is tightened, start the reduction motor to drive the screw rod to move the pre-tightening block and locate it on the bottom surface of the expansion block, so that the expansion block is compressed to fix the gear to prevent radial movement of the gear; when fixing the gear, the pressure is borne by the expansion block and the pre-tightening block. The expansion block and the pre-tightening block have a simple structure and are not easily damaged when subjected to pressure. When processing the mandrel, only the processing and installation cavity needs to be opened, and the structure and processing are simple. On the other hand, when there is a problem with the expansion block and the pre-tightening block, or when it needs to be repaired and maintained, it can be directly taken out or replaced, which is simple to repair and has low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 for Figure 1 AA view of the .
[0015] In the figure: 1. mounting plate; 2. mounting groove; 3. core shaft; 4. mounting cavity; 5. through hole; 6. expansion block; 7. bearing; 8. screw rod; 9. preload block; 10. gasket; 11. pressure ring; 12. gear; 13. fixing nut; 14. conical structure; 15. limit block; 16. reduction motor; 17. mounting table. DETAILED DESCRIPTION
[0016] The utility model will be further described below.
[0017] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0019] See also Figure 1 and Figure 2
[0020] A gear processing fixture comprises a mounting plate 1, wherein a coaxial mounting groove 2 is provided in the middle of the mounting plate 1, and the mounting groove 2 is used to install a core shaft 3, and one end of the core shaft 3 is connected to the mounting groove 2. Specifically, an outer wall of the end of the core shaft 3 is provided with an external thread, and an inner wall of the mounting groove 2 is provided with an internal thread adapted thereto, and the core shaft 3 is installed in the mounting groove 2 by means of a threaded connection, which facilitates the rapid fixing and installation of the core shaft 3 and also facilitates the subsequent replacement and maintenance of the core shaft 3; on the other hand, an installation cavity 4 is provided at the end along its axial direction, and the installation cavity 4 extends to the middle of the core shaft 3, that is, the length of the installation cavity 4 accounts for two-thirds of the overall length of the core shaft 3, so that the installation cavity 4 can extend The mounting groove 2 is formed, and at the same time, a through hole 5 connected to the mounting cavity 4 is formed at the middle part of the core shaft 3 extending out of the mounting groove 2. A tightening block 6 is placed in the through hole 5, and the tightening block 6 can slide up and down in the through hole 5. A bearing 7 is embedded in the bottom of the mounting groove 2, and a screw rod 8 is rotatably connected to the bearing 7. One end of the screw rod 8 extends into the mounting cavity 4 and is threadedly connected to a pre-tightening block 9. When the gear 12 is processed, the inner hole of the gear 12 is opposite to the tightening block 6 in the through hole 5, and the pre-tightening block 9 is moved to fit with the bottom surface of the tightening block 6 by rotating the screw rod 8, so that the tightening block 6 is tightly attached to the inner hole of the gear 12 to generate an extrusion force on the inner hole of the gear 12, so as to fix the gear 12 and avoid radial movement of the gear 12.
[0021] The other end of the core shaft 3 is slidably sleeved with a gasket 10 and a pressure ring 11 in sequence from the end to the through hole 5. When the gear 12 is processed, the gear 12 is clamped between the gasket 10 and the pressure ring 11, and one end face of the gasket 10 is tightly attached to the end face of the mounting plate 1, and the other end face of the gasket 10 is in the same plane as the side face of the through hole 5, that is to say, the gasket 10 can play a role in axial positioning of the gear 12, so that the inner hole of the gear 12 can accurately face the through hole 5; on the other hand, since the expansion block 6 lacks a connecting component in the through hole 5, when the through hole 5 is rotated to open downward, the expansion block 6 may slip off the through hole 5 before the gear 12 is installed. At this time, the gasket 10 can be sleeved on the through hole 5 to avoid The expansion block 6 falls from the through hole 5. After the gear 12 is installed, the gear 12 slides on the core shaft 3. When it slides to the through hole 5, it pushes the gasket 10 to make the gasket 10 fit to the end face of the mounting plate 1. This end of the core shaft 3 is provided with an external thread and is threadedly connected with a fixing nut 13. The fixing nut 13 fits with the pressure ring 11. By rotating the fixing nut 13, axial pressure can be generated on the pressure ring 11, so that the pressure ring 11 axially presses the gear 12 to avoid axial movement of the gear 12. At the same time, the contact area between the gasket 10 and the pressure ring 11 and the gear 12 can be increased. When the gear 12 is subjected to axial pressure, the end face of the gear 12 can be evenly stressed to avoid the gear 12 being crushed and damaged by the fixing nut 13.
[0022] Specifically, in the present embodiment, the expansion block 6 is made of rubber, such as natural rubber, styrene-butadiene rubber, butadiene rubber, etc., and has excellent resilience, tensile strength, elongation, and wear resistance. When the pre-tightening block 9 squeezes the expansion block 6, the expansion block 6 is squeezed and generates a rebound force that expands outward, so that the expansion block 6 is close to the inner hole of the gear 12 and has an interference fit with the inner hole. It should be noted that the height of the pre-tightening block 9 is adapted to the expansion block 6, that is, when the pre-tightening block 9 squeezes the expansion block 6, the expansion block 6 just reaches the maximum compression. When processing the gear 12, the existing processing equipment may generate radial force on the gear 12. At this time, since the expansion block 6 has reached the maximum compression, the thickness of the expansion block 6 will not change, which can effectively avoid radial runout during gear processing and ensure the coaxiality of the gear.
[0023] Specifically, in the present embodiment, one side of the expansion block 6 and both sides of the pre-tightening block 9 are both equipped with an adaptive conical structure 14. When the pre-tightening block 9 moves, the conical structure 14 can provide a guide for the movement of the pre-tightening block 9. At the same time, the conical structure 14 can also generate a vertical force on the expansion block 6 when the pre-tightening block 9 just contacts the expansion block 6, thereby compressing the expansion block 6 and facilitating the pre-tightening block 9 to move to fit with the bottom of the expansion block 6.
[0024] Specifically, in this embodiment, the expansion block 6 and the through hole 5 are provided in plurality and are identical, the plurality of expansion blocks 6 are arranged circumferentially, and the cross section of the expansion block 6 is a sector-shaped structure adapted to the core shaft 3; preferably, the expansion block 6 and the through hole 5 are provided with four, such as Figure 2 As shown, the bottom surface of the expansion block 6 is an arc edge, through which the arc edge of the bottom surface can fit tightly against the outer wall of the pre-tightening block 9. The arc angle of the expansion block 6 is 60°. When the pre-tightening block 9 squeezes the expansion block 6, the fan-shaped hypotenuse of the expansion block 6 facilitates the movement of the expansion block 6 in the through hole 5.
[0025] A limit block 15 is provided at one end of the screw rod 8 extending into the installation cavity 4 , and the limit block 15 prevents the pre-tightening block 9 from moving out of the screw rod 8 .
[0026] One end of the screw rod 8 located outside the installation cavity 4 is connected to a reduction motor 16, and the reduction motor 16 is installed on the installation platform 17. When the pre-tightening block 9 is clamped between the expansion blocks 6, the pre-tightening block 9 will be subjected to a large extrusion force. At this time, it may be difficult to manually rotate the screw rod 8. Therefore, the screw rod 8 is rotated by the reduction motor 16 to facilitate the movement of the pre-tightening block 9. The reduction motor 16 is an abbreviation for a motor and a reducer combined into one. By using a reasonable gear transmission ratio, it can generate a large torque for easily rotating the screw rod 8.
[0027] The working principle of this utility model:
[0028] Before processing the gear 12, first place the expansion block 6 into the through hole 5, then insert the backing ring 10 onto the mandrel 3, and make the backing ring 10 located on the through hole 5 to prevent the expansion block 6 in the through hole 5 from falling off. At this time, the gear 12 can be moved again, and the gear 12 can be inserted into the mandrel 3. At the same time, the inner hole of the gear 12 is moved to the through hole 5, and the backing ring 10 is pushed to fit the end face of the mounting plate 1, and then the pressure ring 11 is inserted and the fixing nut 13 is screwed in. The axial pressure is applied to the gear 12 through the fixing nut 13 to fix the gear and prevent the axial movement of the gear during processing; after the fixing nut 13 is tightened, Start the reduction motor 16, drive the screw rod 8 to move the pre-tightening block 9 and locate it on the bottom surface of the expansion block 6, so that the expansion block 6 is compressed to fix the gear 12 and prevent the gear 12 from moving radially; when fixing the gear 12, the expansion block 6 and the pre-tightening block 9 are used to withstand the pressure. The expansion block 6 and the pre-tightening block 9 have a simple structure and are not easily damaged when subjected to pressure. When processing the core shaft 3, only the processing and installation cavity 4 needs to be opened. The structure and processing are simple. On the other hand, when the expansion block 6 and the pre-tightening block 9 have problems, or need to be overhauled and maintained, they can be directly taken out or replaced. The maintenance is simple and the maintenance cost is low.
[0029] Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for those skilled in the art, according to the idea of the utility model, there will be changes in the specific implementation methods and application scope. Changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.
Claims
1. A gear processing fixture, characterized in that: The invention comprises a mounting plate (1), wherein a coaxial mounting groove (2) is provided in the middle of the mounting plate (1), wherein the mounting groove (2) is used to mount a core shaft (3), wherein one end of the core shaft (3) is connected to the mounting groove (2), and the end connected to the mounting groove (2) is provided with a mounting cavity (4) along its axial direction, wherein a through hole (5) communicating with the mounting cavity (4) is provided in the middle of the core shaft (3), wherein a tightening block (6) is placed in the through hole (5), wherein a bearing (7) is embedded in the bottom of the mounting groove (2), and a screw rod (8) is rotatably connected to the bearing (7), wherein one end of the screw rod (8) extends into the mounting cavity (4) and is threadedly connected to a pre-tightening block (9).
2. A gear processing fixture according to claim 1, characterized in that: The other end of the core shaft (3) is slidably sleeved with a backing ring (10) and a pressure ring (11) in sequence from the end to the through hole (5). When the gear (12) is processed, the gear (12) is clamped between the backing ring (10) and the pressure ring (11), and one end face of the backing ring (10) is tightly attached to the end face of the mounting plate (1). The inner hole of the gear (12) faces the expansion block (6) in the through hole (5). This end of the core shaft (3) is provided with an external thread and is threadedly connected with a fixing nut (13), and the fixing nut (13) is fitted with the pressure ring (11).
3. A gear processing fixture according to claim 2, characterized in that: The expansion block (6) is made of rubber.
4. A gear processing fixture according to claim 3, characterized in that: One side of the expansion block (6) and both sides of the pre-tightening block (9) are adapted conical surface structures (14).
5. A gear processing fixture according to claim 4, characterized in that: The expansion blocks (6) and the through holes (5) are provided in plurality and are identical, the plurality of expansion blocks (6) are arranged circumferentially, and the cross section of the expansion blocks (6) is fan-shaped and adapted to the core shaft (3).
6. A gear processing fixture according to claim 5, characterized in that: A limiting block (15) is provided at one end of the screw rod (8) extending into the installation cavity (4).
7. A gear processing fixture according to claim 6, characterized in that: One end of the screw rod (8) located outside the installation cavity (4) is connected to a reduction motor (16), and the reduction motor (16) is installed on a mounting platform (17).