A dual-state top assembly

Abstract

The present invention discloses a dual-state top assembly, including a top seat, a large top is passed through the top seat, a small top is passed through the large top, an axially extending slide groove is provided on the outer wall at the rear end of the large top, a circumferentially extending clamping groove is provided on one side of the slide groove, a guide limiter matched with the slide groove and the clamping groove is provided at the rear end of the small top, a drawing assembly is connected to the rear end surface of the small top, and a locking assembly is provided between the large top and the top seat. The dual-state top assembly of the present invention belongs to the technical field of accessories of deflection gauges, has simple working state changes and good reliability; as a fixed-side top assembly of a deflection gauge, it has strong product applicability, and is particularly suitable for detecting runout items of shaft products with stepped countersunk holes or fastening screw holes designed at the shaft ends.

Description

Technical Field

[0001] The present invention relates to the art of deflection gauge accessories, and more particularly, to a dual-state top assembly. Background Art

[0002] Currently, when measuring the shaft runout of diesel engine shaft products, two top assemblies are required to hold the shaft on the runout meter. However, some shaft structures have stepped countersunk holes (such as bearing holes or assembly positioning holes) or fastening screw holes of different diameters on the end faces. The existing ordinary runout meters have only one size (diameter) specification for the fixed side top assembly. When measuring shaft runout items, it cannot cover all shaft products. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and the purpose of the present invention is to provide a dual-state top assembly.

[0004] To achieve the above-mentioned objectives, the present invention provides a dual-state top assembly, including a top seat, a large top is passed through the top seat, a small top is passed through the large top, an outer wall at the rear end of the large top is provided with an axially extending slide groove, one side of the slide groove is provided with at least two circumferentially extending grooves, a rear end of the small top is provided with a guide limiter matched with the slide groove and the groove, a pulling assembly is connected to the rear end surface of the small top, and a locking assembly is provided between the large top and the top seat.

[0005] Furthermore, the pulling assembly includes a pulling rotary sleeve sleeved on the rear end of the large top and a first locking screw provided on the rear end of the pulling rotary sleeve and connected to the rear end surface of the top.

[0006] Furthermore, a knurling structure is provided on the outer wall of the pulling and rotating sleeve.

[0007] Furthermore, the locking assembly includes a locking nut threadedly connected to the large center and adapted to the rear end surface of the center seat.

[0008] Furthermore, a clamping screw adapted to the outer wall of the small top is threadedly connected to one side of the large top, and a clearance hole for the clamping screw to pass through is provided on the top seat.

[0009] Furthermore, a return spring is provided between the inner wall of the large tip and the outer wall of the small tip, a positioning hole adapted to the front end of the return spring is provided at the rear end of the large tip, and a positioning protrusion adapted to the rear end of the return spring is provided on the outer wall of the small tip.

[0010] Furthermore, one side of the slide groove is provided with two clamping grooves extending circumferentially along the outer wall of the large top.

[0011] Furthermore, the large top is provided with a threaded hole connected to the clamping screw, and the inner wall of the large top is provided with an annular groove connected to the threaded hole.

[0012] Furthermore, the front end outer wall of the large top is protrudingly provided with a positioning step adapted to the front end surface of the top seat.

[0013] Beneficial Effects

[0014] Compared with the prior art, the dual-state center assembly of the present invention has the following beneficial effects: the dual-state center assembly of the present invention has simple working state changes and good reliability; as a fixed-side center assembly of a runout meter, it has strong product applicability, and is particularly suitable for detecting runout items of shaft products with stepped countersunk holes or fastening screw holes designed at the shaft ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural front view of the dual-state top assembly of the present invention;

[0016] Figure 2 It is a left side view of the structure of the dual-state top assembly of the present invention;

[0017] Figure 3 yes Figure 1 Structural cross-section view in the AA direction;

[0018] Figure 4 It is a structural cross-sectional view of the pull-out rotary sleeve in the present invention;

[0019] Figure 5 It is a schematic diagram of the structure of the small top in the present invention;

[0020] Figure 6 This is the structural front view of the top of the invention;

[0021] Figure 7 yes Figure 6 Structural cross-sectional view along the DD direction.

[0022] In the figure: 1. center seat; 2. large center; 21. conical narrowing portion; 22. positioning portion; 23. sleeve head; 24. sleeve hole; 25. screw portion; 3. small center; 31. drawing head; 4. slide groove; 5. slot; 6. guide limiter; 7. drawing sleeve; 8. first locking screw; 9. clamping screw; 10. locking nut; 11. return spring; 12. positioning step; 13. clearance hole; 14. threaded hole; 15. annular groove. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0024] The specific implementation of the present invention is as follows: Figure 1-7 As shown, a dual-state top assembly includes a top seat 1, a large top 2 is passed through the top seat 1, a small top 3 is passed through the large top 2, an axially extending slide groove 4 is provided on the outer wall at the rear end of the large top 2, and at least two circumferentially extending grooves 5 are provided on one side of the slide groove 4, a guide limiter 6 matched with the slide groove 4 and the groove 5 is provided at the rear end of the small top 3, the guide limiter 6 is threadedly connected to the small top 3, a drawing assembly is connected to the rear end surface of the small top 3, and a locking assembly is provided between the large top 2 and the top seat 1.

[0025] In the dual-state center assembly, a large center 2 is provided on the center seat 1, which can position one end of a shaft component; and a small center 3 is provided in the large center 2, which can protrude from the front end of the large center 2, so as to position a shaft component with a stepped hole. Moreover, by adjusting the guide limiter 6 to engage with the slots 5 at two different positions, the protruding length of the small center 3 can be adjusted, so that the small center 3 can be selected for positioning according to the hole on the end face of the shaft component, or the large center 2 can be used for positioning.

[0026] In this embodiment, the drawing assembly includes a drawing rotary sleeve 7 sleeved on the rear end of the large center 2 and a first locking screw 8 provided at the rear end of the drawing rotary sleeve 7 and connected to the rear end surface of the small center 3. The first locking screw 8 fixes the small center 3 to the drawing rotary sleeve 7, and the small center 3 can be rotated by rotating the drawing rotary sleeve 7. A knurling structure is provided on the outer wall of the drawing rotary sleeve 7 to increase friction.

[0027] In this embodiment, mounting holes are provided on both ends of the tip seat 1, and the large tip 2 includes a conical narrowing portion 21 arranged at the front end, a positioning portion 22 located in the middle and adapted to the mounting hole, and a hollow sleeve head portion 23 arranged at the rear end. A sleeve hole 24 is provided inside the large tip 2 for the small tip 3 to pass through, and a slide groove 4 and a card groove 5 are arranged on the outer wall of the sleeve head portion 23.

[0028] The small center 3 includes a cylindrical section at the front end adapted to the sleeve hole 24 of the large center 2 and a drawing head 31 at the rear end adapted to the inner hole of the sleeve head 23, a guide limiter 6 is provided on the drawing head 31, and a first locking screw 8 is provided on the rear end surface of the drawing head 31.

[0029] In this embodiment, the locking assembly includes a locking nut 10 threadedly connected to the large center 2 and adapted to the rear end surface of the center seat 1, and a screw portion 25 connected to the locking nut 10 is provided at the rear end of the positioning portion 22. A positioning step 12 adapted to the front end surface of the center seat 1 is protruded from the front end outer wall of the large center 2.

[0030] The locking nut 10 abuts against the rear end face of the top seat 1 , and can press the positioning step 12 of the large top 2 against the front end face of the top seat 1 , thereby firmly connecting the large top 2 and the top seat 1 .

[0031] In this embodiment, a clamping screw 9 adapted to the outer wall of the small top 3 is threadedly connected to one side of the large top 2, and a clearance hole 13 for the clamping screw 9 to pass through is provided on the top seat 1. The clamping screw 9 can clamp the small top 3 to prevent the small top 3 and the large top 2 from rotating relative to each other.

[0032] In this embodiment, a return spring 11 is provided between the inner wall of the large top 2 and the outer wall of the small top 3, a positioning hole adapted to the front end of the return spring 11 is provided at the rear end of the large top 2, and a positioning convex edge adapted to the rear end of the return spring 11 is provided on the outer wall of the small top 3. The puller sleeve 7 and the small top 3 are rotated to guide the limiter 6.

[0033] Two clamping grooves 5 extending along the circumference of the outer wall of the large top 2 are provided on one side of the chute 4. The chute 4 and the two clamping grooves 5 form an E-shaped structure, and the chute 4 is chamfered.

[0034] In this embodiment, a threaded hole 14 connected to the clamping screw 9 is provided on the large tip 2, and an annular groove 15 connected to the threaded hole is provided on the inner wall of the large tip 2.

[0035] Working state of the small top point: at this time, the small top point 3 extends out of the big top point 1 relative to the big top point 2, and the clamping screw 9 is used to lock the small top point 3 on the big top point 2. At this time, the guide limit piece 6 falls into the slot 5 in the middle of the E-shaped groove on the big top point 3, and the return spring 11 is in a compressed state. The axial force borne by the small top point 3 is jointly borne by the guide limit piece 6 and the clamping screw 9, and transmitted to the big top point 2.

[0036] Working state of the large center: At this time, the small center 3 is retracted into the large center 2 relative to the large center 2, and the clamping screw 9 is used to lock the small center 3 on the large center 2. At this time, the guide limit piece 6 falls into the slot 5 at the end of the E-shaped groove on the large center 2, and the return spring 11 is in a compressed state (initial compression state).

[0037] During the whole working process, due to the elastic force of the return spring 11, the pull-out rotary sleeve 7 and the small top 3 have a tendency to move outwards. When changing between the two states, it can be completed by pressing forward and rotating the pull-out rotary sleeve 7.

[0038] The dual-state center assembly has simple working state changes and good reliability. As a fixed-side center assembly of a runout meter, it has strong product applicability, and is particularly suitable for detecting runout items of shaft products with stepped countersunk holes (such as bearing holes or assembly locating holes) or fastening screw holes designed at the shaft ends.

[0039] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A dual-state center assembly, comprising a center seat (1), characterized in that: A large top (2) is passed through the top seat (1), a small top (3) is passed through the center of the large top (2), an axially extending slide groove (4) is provided on the outer wall of the rear end of the large top (2), at least two circumferentially extending clamping grooves (5) are provided on one side of the slide groove (4), a guide limiter (6) matched with the slide groove (4) and the clamping groove (5) is provided at the rear end of the small top (3), a drawing component is connected to the rear end surface of the small top (3), a locking component is provided between the large top (2) and the top seat (1), the drawing component comprises a drawing rotary sleeve (7) sleeved on the rear end of the large top (2) and a first locking screw (8) provided at the rear end of the drawing rotary sleeve (7) and connected to the rear end surface of the small top (3), a knurling structure is provided on the outer wall of the drawing rotary sleeve (7), the locking component is provided on the outer wall of the drawing rotary sleeve (7), and the locking component is provided on the outer wall of the drawing rotary sleeve (7). The assembly comprises a locking nut (10) threadedly connected to the large top (2) and adapted to the rear end surface of the top seat (1); a clamping screw (9) threadedly connected to one side of the large top (2) and adapted to the outer wall of the small top (3); a clearance hole (13) for the clamping screw (9) to pass through is provided on the top seat (1); a return spring (11) is provided between the inner wall of the large top (2) and the outer wall of the small top (3); a positioning hole adapted to the front end of the return spring (11) is provided at the rear end of the large top (2); a positioning convex edge adapted to the rear end of the return spring (11) is provided on the outer wall of the small top (3); a threaded hole connected to the clamping screw (9) is provided on the large top (2); and an annular groove connected to the threaded hole is provided on the inner wall of the large top (2).

2. A dual-state top assembly according to claim 1, characterized in that: Two clamping grooves (5) extending in the circumferential direction of the outer wall of the large tip (2) are provided on one side of the slide groove (4).

3. A dual-state top assembly according to claim 1, characterized in that: The front end outer wall of the large center (2) is protrudingly provided with a positioning step (12) adapted to the front end surface of the center seat (1).

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