Clamp for machining automobile steering shaft

Abstract

The clamp for machining the automobile steering shaft comprises a backer assembly and a clamping assembly, the backer assembly is composed of a fixing cylinder, a fixing disc and a positioning column, the two ends of the fixing cylinder are open, the fixing cylinder is used for being inserted into the steering shaft, the fixing disc is fixed to one end of the fixing cylinder, and a positioning protruding disc matched with the fixing cylinder is arranged at one end of the fixing disc. The positioning protruding disc is inserted into the fixing cylinder, the positioning column is composed of a threaded rod, a connecting section and a spline section which are sequentially connected, a first through hole matched with the connecting section is formed in a combination body formed by the fixing disc and the positioning protruding disc, the connecting section is inserted into the first through hole, and a part of the threaded rod is located in the first through hole. A plurality of nuts are screwed on the threaded rod; according to the utility model, the threaded rod, the connecting section, the spline section and the nut are matched, so that the backer assembly can well position the steering shaft, and the fixture and a workpiece have good coaxiality and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to the technical field of clamps. Background Art

[0002] During the machining process, the two ends of the automobile steering shaft have phase angles, which makes it difficult to clamp with ordinary fixtures. The existing fixtures use threaded connections to connect the backrests, making it difficult to ensure the coaxiality and stability between the fixture and the workpiece when machining the steering shaft. The workpiece is prone to moving back and forth, making it difficult to ensure the machining accuracy of the steering shaft. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a fixture for machining an automobile steering shaft, which can ensure good coaxiality and stability between the fixture and the workpiece, and prevent the workpiece from moving back and forth.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a fixture for processing automobile steering shafts, including a backing assembly and a clamping assembly. The backing assembly is composed of a fixed cylinder, a fixed disk, and a positioning column. The fixed cylinder has openings at both ends. The fixed cylinder is used to insert the steering shaft. A fixed disk is fixed at one end of the fixed cylinder. A positioning convex disk adapted to the fixed cylinder is provided at one end of the fixed disk. The positioning convex disk is inserted into the fixed cylinder. The positioning column is composed of a threaded rod, a connecting section, and a spline section connected in sequence. A combination of the fixed disk and the positioning convex disk is provided with a cam adapted to the connecting section. The first through hole corresponds to the first through hole, the connecting section is inserted into the first through hole, a part of the threaded rod is located inside the first through hole, a number of nuts are screwed on the threaded rod, the spline section is against the positioning convex plate, the outer wall of the spline section is provided with an external spline that adapts to the inner spline hole of the steering shaft, the spline section is inserted into the inner spline hole of the rotating shaft, the threaded rod, the connecting section, the spline section, and the fixing tube are located on the same central axis, the clamping assembly clamps the fixing tube, the clamping assembly includes a rubber clamping tube, the rubber clamping tube is surrounded by a number of identical rubber petals, and the rubber clamping tube clamps the steering shaft.

[0005] Preferably, a guide section is provided at the end of the external spline section away from the screw section, and the outer diameter of the guide section gradually decreases along the direction in which the guide section is away from the screw section.

[0006] The cam is secured to a position 56° to the outside of the first sleeve and secured to the outside of the second sleeve with a spring which is secured to the cam face of the second sleeve.

[0007] Preferably, auxiliary grooves for installing sealing rings are provided on the outer walls of the second sleeve and the third sleeve.

[0008] The beneficial effects of the utility model are as follows: the utility model matches the threaded rod, the connecting section, the spline section and the nut, so that the backrest assembly can well position the steering shaft, so that the clamp and the workpiece have good coaxiality and stability; the setting of the rubber clamping cylinder makes it difficult for the workpiece to move back and forth and is not easy to damage the workpiece, thereby ensuring the processing accuracy.

[0009] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a front view of a fixture for processing an automobile steering shaft according to the present invention.

[0011] In the figure: 1-fixing cylinder, 2-fixing plate, 4-first sleeve, 5-second sleeve, 6-third sleeve, 7-rubber clamping cylinder, 10-steering shaft, 20-positioning boss, 31-threaded rod, 32-connecting section, 33-spline section, 34-guide section, 35-nut, 60-limiting ring. DETAILED DESCRIPTION

[0012] See Figure 1The utility model is a fixture for processing automobile steering shafts, including a backing assembly and a clamping assembly. The backing assembly is composed of a fixed cylinder 1, a fixed disk 2, and a positioning column. The fixed cylinder 1 has openings at both ends. The fixed cylinder 1 is used to insert the steering shaft 10. A fixed disk 2 is fixed at one end of the fixed cylinder 1. A positioning convex disk 20 adapted to the fixed cylinder 1 is provided at one end of the fixed disk 2. The positioning convex disk 20 is inserted into the fixed cylinder 1. The positioning column is composed of a threaded rod 31, a connecting section 32, and a spline section 33 connected in sequence. A first through hole adapted to the connecting section 32 is provided on the assembly composed of the fixed disk 2 and the positioning convex disk 20. The connecting section 32 is inserted into the first through hole, and a portion of the threaded rod 31 is located inside the first through hole. Several nuts 35 are screwed on the threaded rod 31, and the spline section 33 is against the positioning boss 20. The outer wall of the spline section 33 is provided with an external spline that is adapted to the inner spline hole of the steering shaft 10. The spline section 33 is inserted into the inner spline hole of the rotating shaft. The threaded rod 31, the connecting section 32, the spline section 33, and the fixing tube 1 are located on the same central axis. The clamping assembly clamps the fixing tube 1. The clamping assembly includes a rubber clamping tube 7, which is surrounded by several identical rubber petals. The rubber clamping tube 7 clamps the steering shaft 10.

[0013] A guide section 34 is provided at the end of the external spline section 33 away from the screw section. The outer diameter of the guide section 34 gradually decreases as the guide section 34 moves away from the screw section.

[0014] The clamping assembly consists of a first sleeve 4, a second sleeve 5, a third sleeve 6, and a rubber clamping tube 7. The first sleeve 4 is sleeved on the outside of the fixed tube 1. The outer wall of the fixed tube 1 includes a first abutting surface. The first abutting surface is in the length direction of the fixed tube 1. The first sleeve 4 is provided with a second abutting surface abutted by the first abutting surface. The first sleeve 4 is sleeved with a second sleeve 5. The outer wall of the second sleeve 5 includes a third abutting surface. The third abutting surface is parallel to the first abutting surface. The second sleeve 5 is provided with a second abutting surface abutted by the third abutting surface. The fourth abutment surface is abutted against the fourth abutment surface, a third sleeve 6 is installed on the side of the second sleeve 5 away from the fixed disk 2, the rubber clamping tube 7 is located inside the third sleeve 6, the rubber clamping tube 7 is in the shape of a truncated cone, the outer diameter of the rubber clamping tube 7 close to the fixed disk 2 end is smaller than the outer diameter of the rubber clamping tube 7 away from the fixed disk 2 end, the inner wall of the third sleeve 6 is adapted to the rubber clamping tube 7, the outer wall of the rubber clamping tube 7 is provided with a circle of limiting grooves, the inner wall of the third sleeve 6 is provided with a circle of limiting rings 60, and the limiting rings 60 are embedded in the limiting grooves.

[0015] Auxiliary grooves for installing sealing rings are provided on the outer walls of the second sleeve 5 and the third sleeve 6.

[0016] Working process of this utility model:

[0017] During the operation of the clamp for machining automobile steering shafts of the present invention, the positioning column in the backrest assembly and the steering shaft 10 are matched with a spline, so that the backrest assembly can well position the steering shaft, and there is good coaxiality and stability between the clamp and the workpiece; the rubber clamping tube 7 can effectively clamp the workpiece, making it difficult for the workpiece to move back and forth and not easily damaged, thereby ensuring machining accuracy.

[0018] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A fixture for machining automobile steering shafts, characterized by: The invention comprises a backrest assembly and a clamping assembly, wherein the backrest assembly is composed of a fixed cylinder (1), a fixed disk (2), and a positioning column. The fixed cylinder (1) is open at both ends. The fixed cylinder (1) is used to insert a steering shaft (10). A fixed disk (2) is fixed at one end of the fixed cylinder (1). A positioning convex disk (20) adapted to the fixed cylinder (1) is provided at one end of the fixed disk (2). The positioning convex disk (20) is inserted into the fixed cylinder (1). The positioning column is composed of a threaded rod (31), a connecting section (32), and a spline section (33) connected in sequence. A first through hole adapted to the connecting section (32) is provided on the assembly composed of the fixed disk (2) and the positioning convex disk (20). The connecting section (32) is inserted into the fixing cylinder (1). In the first through hole, a portion of the threaded rod (31) is located inside the first through hole, a plurality of nuts (35) are screwed onto the threaded rod (31), the spline section (33) abuts against the positioning convex disc (20), an outer spline adapted to the inner spline hole of the steering shaft (10) is provided on the outer wall of the spline section (33), the spline section (33) is inserted into the inner spline hole of the rotating shaft, the threaded rod (31), the connecting section (32), the spline section (33), and the fixing tube (1) are located on the same central axis, the clamping assembly clamps the fixing tube (1), the clamping assembly includes a rubber clamping tube (7), the rubber clamping tube (7) is surrounded by a plurality of identical rubber petals, and the rubber clamping tube (7) clamps the steering shaft (10).

2. The automobile steering shaft processing fixture according to claim 1, characterized in that: A guide section (34) is provided at the end of the spline section (33) away from the screw section, and the outer diameter of the guide section (34) gradually decreases along the direction in which the guide section (34) is away from the screw section.

3. The automobile steering shaft processing fixture according to claim 1, characterized in that: The clamping assembly comprises a first sleeve (4), a second sleeve (5), a third sleeve (6), and a rubber clamping sleeve (7). The first sleeve (4) is sleeved on the outside of the fixed sleeve (1). The outer wall of the fixed sleeve (1) includes a first abutting surface. The first abutting surface is in the length direction of the fixed sleeve (1). The first sleeve (4) is provided with a second abutting surface abutted by the first abutting surface. The first sleeve (4) is sleeved on the outside of the second sleeve (5). The outer wall of the second sleeve (5) includes a third abutting surface. The third abutting surface is parallel to the first abutting surface. The second sleeve (5) is provided with a second abutting surface abutted by the third abutting surface. The fourth abutting surface of the second sleeve (5) is provided with a third sleeve (6) on the side away from the fixed disk (2), the rubber clamping tube (7) is located inside the third sleeve (6), the rubber clamping tube (7) is in the shape of a truncated cone, the outer diameter of the end of the rubber clamping tube (7) close to the fixed disk (2) is smaller than the outer diameter of the end of the rubber clamping tube (7) away from the fixed disk (2), the inner wall of the third sleeve (6) is adapted to the rubber clamping tube (7), the outer wall of the rubber clamping tube (7) is provided with a circle of limiting grooves, the inner wall of the third sleeve (6) is provided with a circle of limiting rings (60), and the limiting rings (60) are embedded in the limiting grooves.

4. The automobile steering shaft processing fixture according to claim 3, characterized in that: Auxiliary grooves for installing sealing rings are provided on the outer walls of the second sleeve (5) and the third sleeve (6).

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