Positioning chuck device for fine turning of worm gear

Abstract

The chuck device comprises an installation shell, a chuck structure, a positioning assembly and a driving structure, one end of the installation shell is provided with a guide channel with the hole diameter gradually reduced from outside to inside, and the chuck structure is movably arranged in the guide channel. The worm gear clamping device comprises a clamping hole formed by a plurality of elastic clamping blocks in a surrounding mode and suitable for insertion of a worm gear, a positioning assembly and a chuck structure are oppositely arranged in an installation shell, and when the chuck structure is driven by a driving structure to move along a guide channel, the elastic clamping blocks can contract and clamp the worm gear under extrusion of the inner wall of the guide channel. By the adoption of the technical scheme, it can be stably guaranteed that the same-degree axis is within the seventh level after the two ends of the worm gear are subjected to finish turning, the machining precision of the worm gear is improved, the worm gear machined through one-time clamping not only improves the part machining quality, but also improves the machining efficiency, and the machining efficiency of the worm gear is improved. And continuity and stability of the whole machining process are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of worm gear finishing machining, in particular to an elastic chuck device for worm gear finishing machining. Background Art

[0002] Worm gears and worms are important components of reducers, and the instability of their processing quality has a great impact on product quality. Worm gear parts need to be processed by CNC lathes for multiple finishing processes such as filing the outer convex circle, end face and inner hole. Since the inner hole in the center of the worm gear part is the process reference hole used by customers for installation and subsequent mechanical processing as a positioning hole, the size and coaxiality of the holes at both ends are very high, requiring the size tolerance of the hole to be controlled at H8 and the coaxiality of both ends to be guaranteed at level 7. However, the current finishing process uses a hydraulic chuck to clamp one end of the worm gear part, and then the other end of the worm gear part is processed by a turning tool. Due to the repeated clamping of the hydraulic chuck, its own positioning center is unstable, resulting in unstable coaxiality at both ends after finishing. In addition, the hydraulic three-jaw must be repaired every time a worm gear part of another model is changed for processing, and the hydraulic three-jaw needs to be disassembled for the change of model, resulting in a large waste of jaws, and the installation operation process is relatively cumbersome, resulting in slow work efficiency. Utility Model Content

[0003] Therefore, the technical problem solved by the utility model is to overcome the problems that the lathe in the prior art uses a hydraulic chuck to clamp one end of the worm gear part during fine turning, resulting in unstable coaxiality at both ends of the worm gear part, and the hydraulic three-jaw needs to be repaired every time the model is changed, the installation operation process is relatively cumbersome, and the work efficiency is low.

[0004] In order to solve the above technical problems, the utility model provides a chuck device for worm gear finishing, comprising:

[0005] The installation shell has an installation cavity and a guide channel opened at one end of the installation shell and extending to communicate with the installation cavity, wherein the aperture of the guide channel is gradually reduced from the outside to the inside;

[0006] A clamping structure, movably disposed in the guide channel, comprising a plurality of elastic clamping blocks arranged at intervals along the circumferential direction, and a clamping hole surrounded by the plurality of elastic clamping blocks to form a clamping hole suitable for inserting the worm gear, wherein the clamping hole extends along the insertion direction of the worm gear and communicates with the installation cavity;

[0007] A positioning assembly is arranged in the installation cavity and is opposite to the clamping structure. One end of the worm wheel is inserted into the clamping hole and is restrainedly abutted against the positioning assembly.

[0008] The driving structure is reciprocatably arranged in the installation cavity and connected to the clamping structure. When the clamping structure moves toward one side of the installation cavity along the guide channel under the drive of the driving structure, multiple elastic clamping blocks are squeezed and contracted to clamp the worm gear.

[0009] As a preferred solution, the guide channel is a tapered channel and extends a set distance along the axial direction of the mounting shell.

[0010] As a preferred solution, the clamping head structure has a tapered outer wall that is adaptively connected to the inner wall of the guide channel.

[0011] As a preferred embodiment, the chuck structure includes a circular portion and a plurality of elastic clamping blocks formed at circumferential intervals on one side of the circular portion, the circular portion is provided with a conical hole coaxially connected to the clamping hole, and the clamping hole is arranged through the center of the chuck structure.

[0012] As a preferred solution, the cross section of the elastic clamp block is fan-shaped, and the conical outer wall of the clamp structure is composed of conical arc surfaces of multiple elastic clamp blocks.

[0013] As a preferred solution, the driving structure includes a ferrule connected to the chuck structure, and at least one driving rod fixedly connected to the ferrule and extending axially out of the mounting cavity along the mounting shell, and the ferrule is provided with a corresponding assembly hole connected to the driving rod, and the driving rod drives the ferrule to move axially along the mounting shell in the mounting cavity.

[0014] As a preferred solution, the chuck structure includes an annular groove arranged on the outer wall of the annular portion, and one end of the ferrule is provided with a connecting protrusion which is sleeved on the annular groove.

[0015] As a preferred embodiment, the positioning assembly includes an isolation plate fixed in the installation cavity and arranged opposite to one end of the clamping structure, a positioning plate sealed and fixed in the inner hole of the isolation plate, and a positioning groove arranged on a side surface of one side of the positioning plate, a positioning push rod opposite to the clamping hole being connected to the positioning groove, and one end of the worm gear cooperates and abuts against the positioning push rod.

[0016] As a preferred solution, a travel range for the ferrule to move is formed between the isolation disk and the mounting shell, a first sealing ring is provided between the ferrule and the mounting shell, and a second sealing ring is provided between the ferrule and the isolation disk.

[0017] As a preferred solution, the isolation disk is provided with a through hole for the drive rod to pass through, a sealing sleeve is provided in the through hole to seal with the drive rod, and a plurality of fixing holes are provided on one end surface of the mounting shell.

[0018] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0019] 1. In the chuck device for fine turning of a worm gear provided by the utility model, a guide channel with a diameter gradually reduced from the outside to the inside is provided at one end of the mounting housing, and a chuck structure is provided in the guide channel, the chuck structure has a clamping hole formed by a plurality of elastic clamping blocks. When in use, one end of the worm gear is first inserted into the clamping hole and limitedly abutted against the positioning assembly, and then the chuck structure is driven by the driving structure to move along the guide channel, so that the plurality of elastic clamping blocks are squeezed by the inner wall of the guide channel to contract and clamp the worm gear, and the plurality of elastic clamping blocks are subjected to the pressure generated by the elastic deformation to enhance the clamping of the worm gear. The clamping grip of the wheel is enhanced, thereby realizing the clamping and tightening of one end of the worm wheel by the chuck device, and finally the worm wheel is subjected to processing operations such as filing the outer convex circle, end face and inner hole through a lathe. The chuck device of the present technical solution is used to replace the traditional hydraulic chuck for clamping and processing the worm wheel. The installation and operation are simple and convenient, and can stably ensure that the coaxiality of both ends of the worm wheel is within 7 levels after fine turning, which is beneficial to improving the processing accuracy of the worm wheel and reducing the deviation occurring during the processing of the worm wheel. The worm wheel processed by one clamping not only improves the processing quality of the parts, but also improves the processing efficiency, and ensures the continuity and stability of the entire processing process.

[0020] 2. In the chuck device for fine turning of worm gears provided by the utility model, according to the guide channel being a tapered channel, the chuck structure has a tapered outer wall that is adaptively connected to the inner wall of the guide channel, and the tapered outer wall is composed of tapered arc surfaces of multiple elastic clamping blocks. The chuck structure with this structural design is connected to the guide channel by a tapered matching connection. When the chuck structure moves along the guide channel toward one side of the installation cavity, the multiple elastic clamping blocks are squeezed due to the change in the aperture of the guide channel to generate a large elastic deformation force. One end of the worm gear is surrounded and clamped by the multiple elastic clamping blocks, and the clamping force is stable and reliable, which not only enhances the tightness of the connection between the two, but also has good coaxiality. Therefore, the chuck device plays a clamping and fixing role on both ends of the worm gear, and can stably guarantee its concentricity requirements, so that the processing steps of the outer convex circle, end face and inner hole of the worm gear are all completed after the same clamping, thereby improving the processing efficiency and quality.

[0021] 3. In the chuck device for worm gear precision turning provided by the utility model, the driving structure includes a ferrule connected to the chuck structure and a driving rod fixedly connected to the ferrule. The driving rod is connected to the driving cylinder and reciprocates along the axial direction of the mounting shell under the drive of the driving cylinder. An annular groove is provided on the outer wall of the annular portion of the chuck structure, and a connecting protrusion is provided at one end of the ferrule and is sleeved on the annular groove, thereby realizing transmission cooperation between the ferrule and the chuck structure. When the driving rod drives the ferrule to move away from the chuck structure, the chuck structure is driven by the ferrule to move toward the inner end of the guide channel with a smaller aperture, thereby enabling multiple elastic clamping blocks to clamp and install the worm gear under pressure to prevent loosening and ensure stable and reliable installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a chuck device for worm gear precision turning provided by the utility model;

[0024] Figure 2 It is a rear view of the chuck device of the utility model;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model along the AA line;

[0026] Figure 4 This is a schematic diagram of the structure of the clamping device of the utility model after the clamping structure is hidden;

[0027] Figure 5 It is a structural schematic diagram of the chuck structure of the utility model;

[0028] Explanation of the accompanying drawings: 1. Mounting shell; 11. Fixing hole; 2. Chuck structure; 20. Clamping hole; 21. Elastic clamp block; 22. Annular portion; 23. Conical hole; 24. Annular groove; 3. Positioning assembly; 31. Isolation disk; 32. Positioning disk; 33. Positioning push rod; 4. Driving structure; 41. Cardan; 42. Connecting protrusion; 43. Driving rod; 44. Assembly hole; 5. Guide channel; 6. Mounting cavity; 61. Travel range; 7. First sealing ring; 8. Second sealing ring; 9. Sealing sleeve; 10. Worm gear. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present utility model, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example

[0033] The present embodiment is described in detail below with reference to the accompanying drawings:

[0034] This embodiment provides Figure 1-5 A chuck device for fine turning of a worm gear is shown, comprising:

[0035] The installation housing 1 has an installation cavity 6 and a guide channel 5 which is opened at one end of the installation housing 1 and extends to communicate with the installation cavity 6. The aperture of the guide channel 5 is gradually reduced from the outside to the inside, that is, the outer end of the guide channel 5 has a larger diameter, and the inner end thereof connected to the installation cavity 6 has a smaller diameter.

[0036] A clamping structure 2 is movably disposed in the guide channel 5, and includes a plurality of elastic clamping blocks 21 arranged at intervals along the circumferential direction, and a clamping hole 20 formed by the plurality of elastic clamping blocks 21 and suitable for inserting the worm gear 10, wherein the clamping hole 20 extends along the insertion direction of the worm gear 10 and communicates with the mounting cavity 6;

[0037] A positioning assembly 3 is arranged in the mounting cavity 6 and is opposite to the clamping structure 2. One end of the worm wheel 10 is inserted into the clamping hole 20 and is restrainedly abutted against the positioning assembly 3.

[0038] The driving structure 4 is reciprocatably arranged in the installation cavity 6 and connected to the clamping structure 2. When the clamping structure 2 moves toward one side of the installation cavity 6 along the guide channel 5 under the drive of the driving structure 4, the multiple elastic clamping blocks 21 are squeezed and contracted to clamp the worm gear 10.

[0039] The above-mentioned implementation mode is the core technical scheme of this embodiment. The chuck device is composed of a mounting shell 1, a chuck structure 2, a positioning assembly 3 and a driving structure 4. A guide channel 5 with a diameter gradually reduced from the outside to the inside is provided at one end of the mounting shell 1, and a chuck structure 2 is provided at the guide channel 5. The chuck structure 2 has a clamping hole 20 formed by a plurality of elastic clamping blocks 21. When in use, one end of the worm wheel 10 is first inserted into the clamping hole 20 and limitedly abutted against the positioning assembly 3. Then, the chuck structure 2 is driven by the driving structure 4 to move along the guide channel 5, so that the plurality of elastic clamping blocks 21 are squeezed by the inner wall of the guide channel 5 and shrink to clamp the worm wheel. 10. Multiple elastic clamping blocks 21 use the pressure generated by elastic deformation to enhance the clamping grip of the worm wheel, so as to achieve the clamping and tightening of one end of the worm wheel by the chuck device. Finally, the worm wheel is subjected to processing operations such as filing the outer convex circle, end face and inner hole through a lathe. The chuck device of the present technical solution is used to replace the traditional hydraulic chuck for clamping and processing the worm wheel. The installation operation is simple and convenient, and can stably ensure that the coaxial degree of both ends of the worm wheel is within 7 levels after fine turning, which is beneficial to improving the processing accuracy of the worm wheel and reducing the deviation in the worm wheel processing process. The worm wheel processed by one clamping not only improves the processing quality of the parts, but also improves the processing efficiency, and ensures the continuity and stability of the entire processing process.

[0040] Combine the following Figure 3-5 The specific setting method of the chuck structure is described in detail:

[0041] The guide channel 5 is a tapered channel and extends a set distance along the axial direction of the mounting housing 1. Correspondingly, the chuck structure 2 has a tapered outer wall that is adapted to be connected to the inner wall of the guide channel 5. As a specific structural setting, the chuck structure 2 includes a circular ring portion 22 and a plurality of elastic clamping blocks 21 formed at one side of the circular ring portion 22 at intervals in the circumferential direction. The circular ring portion 22 is provided with a tapered hole 23 that is coaxially connected to the clamping hole 20. The clamping hole 20 is arranged through the center of the chuck structure 2. A tapered hole 23 is provided between the chuck structure 2 and the guide channel 5 using this structural design. The chuck structure 2 is connected with the guide channel 5 to move toward the installation cavity 6, so that the multiple elastic clamping blocks 21 are squeezed by the change of the aperture of the guide channel 5 to generate a large elastic deformation force. The multiple elastic clamping blocks surround and clamp one end of the worm wheel, and the clamping force is stable and reliable, which not only enhances the tightness of the connection between the two, but also has good coaxiality. Therefore, the chuck device plays a clamping and fixing role on both ends of the worm wheel, which can stably guarantee its concentricity requirements, so that the processing procedures of the outer convex circle, end face and inner hole of the worm wheel can be completed after the same clamping, thereby improving the processing efficiency and quality.

[0042] As a specific structural setting, there are four elastic clamping blocks 21 in the chuck structure 2, wherein the cross-section of the elastic clamping blocks 21 is fan-shaped, and the conical outer wall of the chuck structure 2 is composed of conical arc surfaces of multiple elastic clamping blocks 21. It can be seen that the four elastic clamping blocks 21 are in adaptive contact with the inner wall of the guide channel 5. Therefore, when the chuck structure 2 moves toward the inner end with a smaller aperture of the guide channel 5, the four elastic clamping blocks 21 will immediately clamp the worm gear 10 due to being squeezed. As the displacement distance of the chuck structure 2 increases, the pre-tightening pressure applied to the worm gear becomes greater, and the holding force becomes more stable and reliable.

[0043] Combine the following Figure 1-4 The specific structure of the driving structure is described in detail:

[0044] The driving structure 4 includes a sleeve 41 connected to the chuck structure 2, and at least one driving rod 43 fixedly connected to the sleeve 41 and extending axially out of the mounting cavity 6 along the mounting shell 1. The sleeve 41 is correspondingly provided with an assembly hole 44 for connecting the driving rod 43. One end of the driving rod 43 is fixed in the assembly hole 44, and the other end thereof extends out of the mounting cavity 6 and is connected to the driving cylinder. The driving rod 43 drives the sleeve 41 to move axially along the mounting shell in the mounting cavity 6. It is further preferably arranged that the chuck structure 2 includes an annular groove 24 arranged on the outer wall of the annular portion 22, one end of the sleeve 41 is provided with a connecting protrusion 42 sleeved on the annular groove 24, and the connecting protrusion 4 2 is in the shape of a ring, the driving rod 43 is connected to the driving cylinder, and is driven by the driving cylinder to reciprocate along the axial direction of the mounting shell 1, thereby driving the ferrule 41 to move. An annular groove 24 is provided on the outer wall of the annular portion 22 of the chuck structure 2, and a connecting protrusion 42 is provided at one end of the ferrule 41 to be sleeved on the annular groove 24, so that the transmission cooperation between the ferrule 41 and the chuck structure 2 is realized. When the driving rod 43 drives the ferrule 41 to move away from the chuck structure, the chuck structure 2 is driven by the ferrule 41 to move a certain distance toward the inner end of the guide channel with a smaller aperture, so that the multiple elastic clamping blocks can clamp the worm gear under pressure to prevent loosening, and the installation is stable and reliable.

[0045] The following combination Figure 2-4 The specific structure of the positioning component is described in detail:

[0046] The positioning assembly 3 includes an isolation disk 31 fixed in the installation cavity 6 and arranged opposite to one end of the chuck structure 2, a positioning disk 32 sealed and fixed in the inner hole of the isolation disk 31, and a positioning groove arranged on the side surface of one side of the positioning disk 32, a positioning push rod 33 opposite to the clamping hole 20 is connected to the positioning groove, and one end of the worm gear 10 cooperates and abuts against the positioning push rod 33. This structural arrangement limits the distance that the worm gear is inserted into the clamping hole 20 through the positioning assembly 3, and prompts the worm gear to be installed in the chuck device and inserted into place.

[0047] As a preferred embodiment, a travel range 61 for the ferrule 41 to move is formed between the isolation disk 31 and the mounting shell 1. This design leaves a movable gap between the ferrule 41 and the isolation disk 31. The travel range 61 just meets the distance requirement for the ferrule 41 to drive the chuck structure 2 to move. A first sealing ring 7 is provided between the ferrule 41 and the mounting shell 1, and a second sealing ring 8 is provided between the ferrule 41 and the isolation disk 31. The first sealing ring is used to achieve a sealed connection between the outer wall of the ferrule 41 and the mounting shell 1, and the second sealing ring is used to achieve a sealed connection between the inner wall of the ferrule 41 and the isolation disk 31. A through hole for the drive rod 43 to pass through is correspondingly provided on the isolation disk 31, and a sealing sleeve 9 is provided in the through hole to seal with the drive rod 43. The sealing of the drive rod 43 at the through hole position is achieved by the sealing sleeve 9. In order to facilitate the installation of the chuck device on a lathe, a plurality of fixing holes 11 are provided on one end surface of the installation shell 1, and the chuck device is installed and fixed by fastening bolts to the fixing holes 11.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A chuck device for fine turning of a worm gear, characterized in that: include: A mounting shell (1) having a mounting cavity (6) and a guide channel (5) opened at one end of the mounting shell (1) and extending to communicate with the mounting cavity (6), wherein the aperture of the guide channel (5) is gradually reduced from the outside to the inside; A clamping head structure (2) is movably arranged in the guide channel (5), comprising a plurality of elastic clamping blocks (21) arranged at intervals along the circumferential direction, and a clamping hole (20) formed by the plurality of elastic clamping blocks (21) and suitable for inserting the worm gear (10), wherein the clamping hole (20) extends along the insertion direction of the worm gear (10) and communicates with the installation cavity (6); A positioning assembly (3) is arranged in the installation cavity (6) opposite to the clamping structure (2); one end of the worm wheel (10) is inserted into the clamping hole (20) and then restrainedly abuts against the positioning assembly (3); The driving structure (4) is reciprocatingly arranged in the installation cavity (6) and is connected to the clamping structure (2). When the clamping structure (2) moves along the guide channel (5) toward one side of the installation cavity (6) under the drive of the driving structure (4), the plurality of elastic clamping blocks (21) are squeezed and contracted to clamp the worm gear (10).

2. A chuck device for worm gear finishing according to claim 1, characterized in that: The guide channel (5) is a tapered channel and extends a set distance along the axial direction of the mounting housing (1).

3. A chuck device for worm gear finishing according to claim 2, characterized in that: The clamping head structure (2) has a tapered outer wall which is adaptively connected to the inner wall of the guide channel (5).

4. A chuck device for worm gear finishing according to claim 3, characterized in that: The clamping head structure (2) comprises an annular portion (22) and a plurality of elastic clamping blocks (21) formed at intervals along the circumferential direction on one side of the annular portion (22); the annular portion (22) is provided with a conical hole (23) coaxially connected to the clamping hole (20); and the clamping hole (20) is provided through the center of the clamping head structure (2).

5. A chuck device for worm gear finishing according to claim 4, characterized in that: The cross section of the elastic clamp block (21) is fan-shaped, and the conical outer wall of the clamp structure (2) is composed of a plurality of conical arc surfaces of the elastic clamp blocks (21).

6. A chuck device for worm gear finishing according to any one of claims 1 to 5, characterized in that: The driving structure (4) includes a ferrule (41) connected to the chuck structure (2), and at least one driving rod (43) fixedly connected to the ferrule (41) and extending axially out of the mounting cavity (6) along the mounting shell (1), and the ferrule (41) is provided with a corresponding assembly hole (44) connected to the driving rod (43), and the driving rod (43) drives the ferrule (41) to move axially along the mounting shell in the mounting cavity (6).

7. A chuck device for finishing turning of a worm gear according to claim 6, characterized in that: The chuck structure (2) comprises an annular groove (24) arranged on the outer wall of the annular portion (22), and one end of the clamping sleeve (41) is provided with a connecting protrusion (42) sleeved on the annular groove (24).

8. A chuck device for worm gear finishing according to any one of claims 1 to 5, characterized in that: The positioning assembly (3) comprises an isolation disk (31) fixed in the installation cavity (6) and arranged opposite to one end of the clamping structure (2), a positioning disk (32) sealed and fixed in the inner hole of the isolation disk (31), and a positioning groove arranged on a side surface of one side of the positioning disk (32), wherein a positioning push rod (33) opposite to the clamping hole (20) is connected to the positioning groove, and one end of the worm gear (10) cooperates and abuts against the positioning push rod (33).

9. A chuck device for worm gear finishing according to claim 8, characterized in that: A travel range (61) is formed between the isolation disk (31) and the mounting shell (1) in which the ferrule (41) can move, a first sealing ring (7) is provided between the ferrule (41) and the mounting shell (1), and a second sealing ring (8) is provided between the ferrule (41) and the isolation disk (31).

10. A chuck device for worm gear finishing according to claim 9, characterized in that: The isolation disk (31) is provided with a through hole through which the driving rod (43) can pass, and a sealing sleeve (9) is provided in the through hole to seal with the driving rod (43). A plurality of fixing holes (11) are provided on one end surface of the mounting housing (1).

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