Quick-change turning clamping mechanism for special-shaped piston rod with lug ring

Abstract

The invention discloses a quick-change turning clamping mechanism for a special-shaped piston rod with a lug ring, relates to the technical field of clamping tools, and aims to solve the problems that in the prior art, a rod head of the special-shaped integral piston rod with the lug ring cannot be directly clamped through a three-jaw self-centering chuck and needs to be clamped through a four-jaw chuck, precision is poor, efficiency is low and the like. One side of the base body is connected with three-jaw self-centering chuck equipment, and a clamping assembly is arranged on the other side of the base body and used for clamping the special-shaped piston rod with the lug ring. A replaceable tip is arranged in the middle of the base body, a center hole is formed in the middle of a lug ring of the special-shaped piston rod with the lug ring, and the replaceable tip can be embedded in the center hole so that the central axis of the three-jaw self-centering chuck equipment and the central axis of the special-shaped piston rod with the lug ring can be located on the same straight line. The special-shaped piston rod with the lug ring can be directly clamped by existing standard three-jaw self-centering chuck equipment, the applicability is high, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to a quick-change turning clamping mechanism for a special-shaped piston rod with earrings, belonging to the technical field of clamping tooling. Background Art

[0002] In the fields of mining excavators, tunnel boring machines, etc., because the main machine has higher requirements on the strength, surface hardness, and mechanical properties of the cylinder piston rod, some piston rods are made of 42CrMo. However, due to the poor weldability of 42CrMo, such piston rods are mostly made of integral forged piston rods. After integral forging, the rod head thread, sealing groove, inner and outer circles of the piston rod body are precision machined.

[0003] At present, in actual production, the precision machining of this type of piston rod head mostly adopts four-jaw chuck clamping, and single-jaw dial calibration of the rod body to ensure the coaxiality of clamping. The machining efficiency is low, the requirements for the chuck form of the equipment are high, and the ability to ensure shape and position accuracy is poor. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a quick-change turning and clamping mechanism for a special-shaped piston rod with earrings, which can realize the existing standard three-jaw self-centering chuck equipment, has strong applicability, and improves production efficiency.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions: The present invention provides a quick-change turning clamping mechanism for a special-shaped piston rod with an earring, comprising a base, one side of the base is connected to a three-jaw self-centering chuck device, and the other side is provided with a clamping assembly, the clamping assembly is used to clamp the special-shaped piston rod with an earring; A replaceable tip is provided in the middle of the base, and a center hole is provided in the middle of the earring of the special-shaped piston rod with earrings. The replaceable tip can be embedded in the center hole to realize that the central axes of the three-jaw self-centering chuck device, the base and the special-shaped piston rod with earrings are in the same straight line.

[0006] Furthermore, the base is overall in an inverted U-shape, with a first threaded hole in the middle, the replaceable center is threadedly connected to the first threaded hole, and an outer circular groove is circumferentially provided on one side of the first threaded hole close to the three-jaw self-centering chuck device, and the outer circular groove can be clamped in the three-jaw self-centering chuck device.

[0007] Furthermore, the shape of the first threaded hole adopts a 60-degree cone surface to ensure the repeat positioning accuracy after each replacement of the top point, and the end surface of the replaceable top point is milled flat for easy tightening.

[0008] Furthermore, the number of the clamping components is 2 groups, which are respectively arranged on the upper and lower sides of the base, and the clamping components include a groove, and slideways are provided on both sides of the groove. A T-block is slidably provided in the slideway, and the T-block is connected to the slider by tightening the screws. A second threaded hole is vertically opened in the middle of the slider, and a first adjusting screw is threadedly connected in the second threaded hole. The first adjusting screw passes through the groove and is connected to the replaceable umbrella top.

[0009] Furthermore, it also includes a baffle plate for limiting the sliding block, and the baffle plate is arranged at the end of the groove.

[0010] Furthermore, third threaded holes are provided on both sides of the groove, and matching screws are provided in the third threaded holes, and the baffle is fixed by screwing the screws into the third threaded holes.

[0011] Furthermore, a second adjusting screw is threadedly connected to the middle portion of the baffle, and the second adjusting screw extends into the groove and abuts against the sliding block.

[0012] Furthermore, the upper end of the first adjusting screw is pentagonal, and the lower end is provided with an external thread, and the replaceable umbrella top is provided with an internal thread matched with the external thread, so that the replaceable umbrella top is threadedly connected to the first adjusting screw.

[0013] Furthermore, the top surface of the replaceable umbrella is 75°, and for piston rods of different specifications, the replaceable umbrella top can be pressed into the pin shaft holes at both end surfaces of the piston rod earrings by sliding a T-block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The clamping mechanism provided by the present invention is compatible with the standard three-jaw self-centering chuck device, so that the processing of the special-shaped piston rod with earrings does not require the use of a special four-jaw chuck device, which has strong applicability and improves the processing efficiency. The positioning is achieved through the top point, and the top point hole is processed by clamping the outer circle of the piston rod, so that the central axes of the piston rod, the standard three-jaw self-centering chuck device, and the clamping mechanism are coaxial, thereby improving the positioning accuracy. The present invention adopts a two-side surrounding clamping assembly, which can achieve good clamping of special-shaped piston rods with earrings. The clamping is stable and can meet the high-speed operation during the processing, thereby improving the reliability and safety of the processing. The clamping component can slide in the groove while ensuring the clamping rigidity and strength, and the top is replaceable. It can be applicable to a variety of piston rods with earrings of different specifications, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a quick-change turning clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention, which clamps a special-shaped piston rod with earrings; Figure 2It is a schematic diagram of the connection relationship between the quick-change turning clamping mechanism of the special-shaped piston rod with earrings and the three-jaw self-centering chuck device in one embodiment of the present invention; Figure 3 It is a structural schematic diagram of a quick-change turning and clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention; Figure 4 It is a structural schematic diagram of a base body of a quick-change turning and clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention; Figure 5 It is a cross-sectional structural schematic diagram of a quick-change turning and clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention; Figure 6 It is a schematic diagram of the connection relationship between the first adjusting screw and the replaceable umbrella top of the special-shaped earring piston rod quick-change turning clamping mechanism in one embodiment of the present invention; Figure 7 It is a structural schematic diagram of a slider of a quick-change turning and clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention; Figure 8 It is a schematic structural diagram of a replaceable center of a quick-change turning clamping mechanism for a special-shaped piston rod with earrings in one embodiment of the present invention; In the figure: 1-base, 2-three-jaw self-centering chuck device, 3-special-shaped piston rod with earrings, 4-replaceable top, 5-external groove, 6-first threaded hole, 7-groove, 8-slide, 9-T-block, 10-slider, 11-tightening screw, 12-second threaded hole, 13-first adjusting screw, 14-replaceable umbrella top, 15-third threaded hole, 16-second adjusting screw, 17-baffle, 18 screw, 19 center hole. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0017] like Figure 1 As shown, an embodiment of the present invention provides a quick-change turning and clamping mechanism for a special-shaped piston rod with an earring, comprising a base body 1, which is in an inverted U shape with an opening to one side.

[0018] A first threaded hole 6 is provided at the center of the vertical portion of the base 1. In this embodiment, the first threaded hole 6 is an M30 threaded hole with a 60-degree taper to ensure the repeatable positioning accuracy after each replacement of the top. The first threaded hole 6 is internally threaded with a replaceable top 4, and the end surface of the replaceable top is milled flat for easy tightening.

[0019] A center hole 19 is provided in the middle of the outer side of the earring of the special-shaped piston rod 3, and the replaceable tip 4 can be embedded in the center hole 19. Since the center hole 19 corresponds to the center axis of the special-shaped piston rod 3 with earrings, and the replaceable tip 4 corresponds to the center axis of the base 1, the correspondence between the two can make the base 1 and the special-shaped piston rod with earrings 3 realize the center axis coaxial. When the replaceable tip 4 is worn or does not match the special-shaped piston rod 3 with earrings, it can be quickly replaced, which is convenient to use.

[0020] An outer circular groove 5 is circumferentially provided on one side of the first threaded hole 6 away from the opening direction of the base 1, and the outer circular groove 5 is clamped between the soft jaws of the three-jaw self-centering chuck device 2, so that the central axes of the three-jaw self-centering chuck device 2, the base 1 and the special-shaped piston rod with earrings 3 are on the same straight line.

[0021] The base 1 is provided with a clamping assembly on both the upper and lower sides, and the clamping assembly is used to clamp the special-shaped piston rod with earrings 3, and includes a groove 7, and slideways 8 are provided on both sides of the groove 7, and a T-shaped block 9 is slidably provided in the slideway 8. In this embodiment, the slideway 8 adopts an inverted T-shaped structure, and the T-shaped block 9 is adapted to the slideway 8, and can be clamped inside the slideway 8 while realizing free sliding.

[0022] The T-block 9 is connected to the slider 10 by screws. The slider 10 is I-shaped and can slide freely while being clamped in the groove 7, thereby clamping the special-shaped piston rod 3 with earrings of different specifications. When the earring diameter of the special-shaped piston rod 3 with earrings is large, the slider 10 needs to be moved to the opening side of the groove 7. When the T-block 9 sliding in the slideway 8 is small, the slider 10 needs to be moved to the side of the groove 7 away from the opening.

[0023] A second threaded hole 12 is vertically provided in the middle of the slider 10, and a first adjusting screw 13 is connected to the inner thread of the second threaded hole 12. The first adjusting screw 13 passes through the groove 7 and extends to the inside of the base 1 to be connected to the replaceable umbrella top 14. In this embodiment, the upper end of the first adjusting screw 13 is pentagonal, and the lower end is provided with an outer thread. The replaceable umbrella top 14 is provided with an inner thread matching the outer thread, and the replaceable umbrella top 14 is threadedly connected to the lower end of the first adjusting screw 13. The end face of the replaceable umbrella top 14 is set as a 75° cone surface. For piston rods of different specifications, the replaceable umbrella top can be pressed into the pin shaft holes on both end faces of the piston rod earring by moving the slider. Example 2

[0024] On the basis of the embodiment 1, the embodiment further provides a baffle 17 at the end of the groove 7, and provides a third threaded hole 15 on both sides of the groove 7. The baffle 17 is provided at the end of the groove 7 by means of screws matching the third threaded holes 15. A second adjusting screw 16 is threadedly connected to the middle of the baffle 17, and the second adjusting screw 16 extends into the groove 7 to abut against the slider 10. The slider 10 can be pushed to slide by screwing in the second adjusting screw 16, thereby changing the position of the replaceable umbrella top 14, so that the center of the replaceable umbrella top 14 is aligned with the earring center of the special-shaped piston rod 3 with earrings.

[0025] The working principle of the present invention includes: When turning processing is required for the special-shaped earring piston rod 3, the outer circular groove 5 is clamped between the jaws of the standard three-jaw self-centering chuck device 2, and then the earring part of the special-shaped earring piston rod 3 is placed into the base body 1 from the opening direction of the base body 1, and the replaceable tip 4 is just embedded in the center hole 19 of the special-shaped earring piston rod 3, so that the centers of the standard three-jaw self-centering chuck device 2, the base body 1 and the special-shaped earring piston rod 3 are coaxial.

[0026] According to the position of the center of the earring, the second adjusting screw 16 is rotated to push the slider 10 to a suitable position, and then the first adjusting screw 13 is rotated to make the replaceable umbrella tops 14 on the upper and lower sides extend toward the middle of the base 1 until the earring is clamped, so as to facilitate the subsequent turning operation.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A quick-change turning and clamping mechanism for a special-shaped piston rod with earrings, characterized in that: It comprises a base body, one side of which is connected to a three-jaw self-centering chuck device, and the other side of which is provided with a clamping assembly, and the clamping assembly is used to clamp a special-shaped piston rod with earrings; A replaceable tip is provided in the middle of the base, and a center hole is provided in the middle of the earring of the special-shaped piston rod with earrings. The replaceable tip can be embedded in the center hole to realize that the central axes of the three-jaw self-centering chuck device, the base and the special-shaped piston rod with earrings are in the same straight line.

2. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 1, characterized in that: The base is generally in an inverted U shape, with a first threaded hole in the middle, the replaceable center is threadedly connected to the first threaded hole, and an outer circular groove is circumferentially provided on one side of the first threaded hole close to the three-jaw self-centering chuck device, and the outer circular groove can be clamped in the three-jaw self-centering chuck device.

3. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 2 is characterized in that: The first threaded hole has a 60-degree cone shape.

4. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 1, characterized in that: There are two groups of clamping assemblies, which are respectively arranged on the upper and lower sides of the base. The clamping assembly includes a groove, and slideways are provided on both sides of the groove. A T-block is slidably provided in the slideway, and the T-block is connected to the slider by tightening the screw. A second threaded hole is vertically opened in the middle of the slider, and a first adjusting screw is threadedly connected in the second threaded hole. The first adjusting screw passes through the groove and is connected to the replaceable umbrella top.

5. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 4 is characterized in that: It also includes a baffle plate for limiting the position of the sliding block, and the baffle plate is arranged at the end of the groove.

6. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 5, characterized in that: The groove is provided with third threaded holes on both sides, and the third threaded holes are provided with matching screws, and the baffle is fixed by screwing the screws into the third threaded holes.

7. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 6, characterized in that: A second adjusting screw is threadedly connected to the middle portion of the baffle, and the second adjusting screw extends into the groove and abuts against the sliding block.

8. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 4, characterized in that: The upper end of the first adjusting screw is pentagonal, and the lower end is provided with an external thread. The replaceable umbrella top is provided with an internal thread matched with the external thread, so that the replaceable umbrella top is threadedly connected with the first adjusting screw.

9. The quick-change turning and clamping mechanism for a special-shaped piston rod with earrings according to claim 4, characterized in that: The top end surface of the replaceable umbrella is 75°.

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