Locking protection device for part surface treatment

Abstract

The utility model discloses a locking protection device for part surface treatment, which comprises a mandrel rod assembly, a detachable protective cover assembly and a locking assembly for locking the protective cover assembly, the protective cover assembly is arranged on the periphery of the mandrel rod assembly, and two ends of the mandrel rod assembly are connected with the protective cover assembly. When the locking protection device for surface treatment of the parts is used, the parts are installed on the mandrel rod assembly, a plurality of parts can be installed according to the axial size of the mandrel rod assembly, and therefore machining efficiency is improved, the degree of freedom of the mandrel rod assembly is limited through the protection cover assembly and the locking assembly, locking is firmer and does not loosen, and the service life of the mandrel rod assembly is prolonged. The parts do not need to be directly clamped, clamping damage is avoided, meanwhile, the protective cover assembly plays a role in protecting the parts from falling off or colliding in the machining process, and the structure is reasonable and effective.

Description

TECHNICAL FIELD

[0001] The utility model relates to a machining fixture, especially a locking protection device for part surface treatment, which is suitable for clamping protection and locking of gear and hollow shaft parts during surface treatment. BACKGROUND

[0002] During the surface treatment of parts, the parts are generally fixed on a rotating workbench or placed in a working groove. With high-speed rotation or rapid vibration during the machining process, the clamp is prone to looseness, causing the parts to fall off and resulting in damage to the parts and posing a safety risk during machining. If the clamping is too tight, the parts are also prone to damage during machining. In addition, the clamping of single parts cannot meet the efficiency requirements of small-batch production of parts. Taking some high-precision gears as an example, in order to meet the requirement of surface support rate of gear teeth, the parts need to be vibrated and polished. Currently, the general method is to place the parts on a mandrel, insert or lock them with a nut, and then put them into a barrel containing zinc particles for vibration polishing. However, this locking method will loosen during long-time vibration, causing the parts to fly out and resulting in damage to the parts and posing a safety risk to the operator. In addition, the parts are not protected externally, and if the zinc barrel is damaged, the parts will be scratched and the quality of the parts will be affected. SUMMARY

[0003] The utility model solves the technical problem of overcoming the shortcomings of the prior art and provides a locking protection device for part surface treatment, which can realize multi-piece clamping to improve machining efficiency and play a protective role without direct clamping operation on the parts.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A locking protection device for part surface treatment, comprising a mandrel assembly, a detachable protective cover assembly, and a locking assembly for locking the protective cover assembly, the protective cover assembly is arranged on the outer periphery of the mandrel assembly, and the two ends of the mandrel assembly are connected with the protective cover assembly.

[0006] As a further improvement of the above technical scheme, the mandrel assembly comprises a first sleeve, a second sleeve, and an elastic locking piece arranged in the first sleeve, the first sleeve has a stepped structure, the second sleeve is sleeved on the outer periphery of the smaller end of the first sleeve, the elastic locking piece is provided with a locking column, the part where the first sleeve and the second sleeve are sleeved is provided with a locking hole, and the locking column is arranged in the locking hole.

[0007] As a further improvement of the above technical scheme, the elastic locking piece has a V-shaped structure and an arc-shaped transition part in the middle, the inner wall of the first sleeve is provided with a mounting pin, the arc-shaped transition part is sleeved on the mounting pin, and the locking column is arranged on both sides of the elastic locking piece.

[0008] As a further improvement of the above technical solution: the elastic locking member is provided with at least two and is uniformly distributed in the circumferential direction.

[0009] As a further improvement of the above technical solution: the heart stick assembly is provided with a flange at both ends, the flange is provided with a positioning groove, the protective cover assembly is provided with a support plate at both ends, and the support plate extends into the positioning groove.

[0010] As a further improvement of the above technical solution: the protective cover assembly includes at least two cover bodies, each of the cover bodies is distributed in the circumferential direction, and the joint of two adjacent cover bodies is a zigzag structure.

[0011] As a further improvement of the above technical solution: a plurality of through holes are formed in the cover body.

[0012] As a further improvement of the above technical solution: the locking assembly includes two cover plates and is arranged at both ends of the protective cover assembly, the cover plate is provided with a first connecting lug, the cover body is provided with a second connecting lug, and the first connecting lug and the second connecting lug are connected by a fastener.

[0013] As a further improvement of the above technical solution: the first connecting lug is a U-shaped structure, and the second connecting lug of two adjacent cover bodies is located in the first connecting lug.

[0014] As a further improvement of the above technical solution: the cover plate is provided with a protrusion, and the protrusion abuts against the end of the heart stick assembly.

[0015] Compared with the prior art, the locking protection device for part surface treatment has the advantages that: when used, the parts are installed on the heart stick assembly, a plurality of parts can be installed according to the axial size of the heart stick assembly, thereby improving the processing efficiency, the heart stick assembly is limited in degree by the protective cover assembly and the locking assembly, the locking is more firm and not loose, the parts do not need to be directly clamped, clamping damage is avoided, the protective cover assembly plays a protective role for the parts falling off or bumping during processing, and the structure is reasonable and effective. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic view of the locking protection device for part surface treatment of the utility model.

[0017] Figure 2 is a front view structure schematic view of the locking protection device for part surface treatment of the utility model.

[0018] Figure 3 is a cross-sectional structure schematic view of the locking protection device for part surface treatment of the utility model.

[0019] Figure 4 Fig. 3 is a perspective view of the elastic locking piece in the utility model.

[0020] Figure 5 Fig. 4 is a perspective view of the cover plate in the utility model.

[0021] The reference signs in the drawings represent:

[0022] 1, handlebar assembly; 11, first sleeve; 111, mounting pin; 12, second sleeve; 13, elastic locking piece; 131, locking column; 132, arc-shaped transition part; 14, flange; 141, positioning groove; 2, protective cover assembly; 21, support plate; 22, cover body; 221, through hole; 23, second connecting lug; 3, locking assembly; 31, cover plate; 32, first connecting lug; 33, protrusion. DETAILED DESCRIPTION

[0023] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0025] In the utility model, unless otherwise specifically defined and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] The utility model will be further described in detail below in combination with the drawings and specific embodiments of the description.

[0027] Figures 1 to 5The utility model discloses a locking protection device for part surface treatment, which comprises a mandrel assembly 1, a detachable protective cover assembly 2 and a locking assembly 3 for locking the protective cover assembly 2.

[0028] The locking protection device for part surface treatment of the embodiment can improve the machining efficiency, and the mandrel assembly 1 is limited in degrees by the protective cover assembly 2 and the locking assembly 3, so that the locking is more firm and not loose, and the part does not need to be directly clamped, so that clamping damage is avoided, and the protective cover assembly 2 plays a protective role in case of part falling or bumping during machining.

[0029] Further, in the embodiment, the mandrel assembly 1 comprises a first sleeve 11, a second sleeve 12 and an elastic locking piece 13 arranged in the first sleeve 11, the first sleeve 11 is a stepped structure, the second sleeve 12 is arranged on the outer periphery of one end of the first sleeve 11 with a smaller diameter, the elastic locking piece 13 is provided with a locking column 131, the part to be machined is arranged on the first sleeve 11 and / or the second sleeve 12, and then the first sleeve 11 is connected with the second sleeve 12 until the end of the second sleeve 12 abuts against the step of the first sleeve 11, at this time, the locking holes on the first sleeve 11 and the second sleeve 12 are aligned, the locking column 131 is popped out under the elastic force of the elastic locking piece 13 and extends into the locking hole of the second sleeve 12, so that the part is locked and prevented from falling off during rotation or vibration, and the structure is reasonable and effective.

[0030] Further, in the embodiment, the elastic locking piece 13 is of a V-shaped structure and is provided with an arc-shaped transition part 132 in the middle, the inner wall of the first sleeve 11 is provided with a mounting pin 111, and the arc-shaped transition part 132 is arranged on the mounting pin 111, so that the elastic locking piece 13 is conveniently mounted in the first sleeve 11, and the position of the locking column 131 can be adjusted by rotating the mounting pin 111, the locking column 131 is arranged on both sides of the elastic locking piece 13, has good symmetry, and is beneficial to ensuring the locking effect between the first sleeve 11 and the second sleeve 12.

[0031] As a preferred embodiment, the elastic locking piece 13 is provided with two and is uniformly distributed in the circumferential direction, which is conducive to further strengthening the locking effect between the first sleeve 11 and the second sleeve 12 and ensuring the consistency of the force received by the mandrel assembly 1 in all directions. Of course, in other embodiments, the number of elastic locking pieces 13 can be further adjusted.

[0032] Further, in the embodiment, the mandrel assembly 1 is provided with a flange 14 at both ends, the flange 14 is provided with a positioning groove 141, the protective cover assembly 2 is provided with a support plate 21 at both ends (specifically, the both ends of the cover body 22 are provided with a support plate 21), and the support plate 21 extends into the positioning groove 141. Through the cooperation of the support plate 21 and the flange 14, a protection effect is achieved, which can effectively prevent damage to parts caused by collision and the like, and can also prevent the first sleeve 11 and the second sleeve 12 from moving axially and separating to a certain extent.

[0033] Further, in the embodiment, the protective cover assembly 2 includes two cover bodies 22, and of course in other embodiments, the number of cover bodies 22 can be further adjusted. Each cover body 22 is distributed in the circumferential direction, and the joints of the adjacent two cover bodies 22 are in a zigzag structure, which can make the cover bodies 22 interlock in a staggered manner and not easy to fall off when vibrating.

[0034] Further, in the embodiment, a plurality of through holes 221 are formed in the cover body 22. The cover body 22 with the hollow structure can adapt to the processing requirements of different parts, facilitate the contact with the medium and discharge in processing, such as the leakage of sand particles after sand blasting and the contact of parts with zinc particles during vibration polishing.

[0035] Further, in the embodiment, the locking assembly 3 includes two cover plates 31 and is arranged at both ends of the protective cover assembly 2, the cover plate 31 is provided with a first connecting lug 32, the cover body 22 is provided with a second connecting lug 23, and the first connecting lug 32 and the second connecting lug 23 are connected by a fastener (such as a bolt, a screw rod, etc.). The protective cover assembly 2 can be effectively locked, the degrees of freedom in all directions are limited, the locking is firm and not easy to loosen, and the assembly and disassembly are convenient.

[0036] As a preferred embodiment, the first connecting lug 32 is in a U-shaped structure, and the second connecting lug 23 of the adjacent two cover bodies 22 is located in the first connecting lug 32, which is conducive to preventing the second connecting lug 23 of the cover body 22 from being pulled out of the first connecting lug 32.

[0037] Further, in the embodiment, the cover plate 31 is provided with a protrusion 33, and the protrusion 33 abuts against the end of the mandrel assembly 1 (specifically, the protrusion 33 abuts against the end face of the flange 14), which can limit the axial movement or the upward and downward movement of the mandrel assembly 1. At the same time, the rigidity of the clamp is enhanced, which is conducive to ensuring the reliability of the clamping of multiple parts.

[0038] Part of high-precision gears need to be vibration polished in order to meet the requirement of tooth surface support rate. The process of vibration polishing of high-precision gears by the locking protection device for part surface treatment is as follows:

[0039] (1) The locking protection device for part surface treatment is manufactured according to the requirement and is inspected to be qualified;

[0040] (2) Part installation: the part is worn on the first sleeve 11 and / or the second sleeve 12, then the first sleeve 11 is sleeved with the second sleeve 12 until the end of the second sleeve 12 abuts against the step of the first sleeve 11, at this time, the lock holes on the first sleeve 11 and the second sleeve 12 are aligned, the lock column 131 is popped out under the elastic force of the elastic locking piece 13 and is inserted into the lock hole of the second sleeve 12 to be locked; the support plates 21 at the upper and lower ends of the cover body 22 are embedded into the positioning grooves 141 at the two ends of the mandrel assembly 1, then the cover plates 31 at the two ends are installed, finally the first connecting lug 32 and the second connecting lug 23 are connected and fixed by the fastening piece.

[0041] (3) Vibration polishing processing: the whole clamp is put into the barrel filled with zinc particles to be vibration polished. After finishing, the cover plates 31, the cover body 22 and the mandrel assembly 1 are disassembled and the part is taken out.

[0042] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Any skilled person in the art can make many possible changes and modifications to the utility model technical scheme or modify equivalent embodiments with equivalent changes without departing from the scope of the utility model technical scheme. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model technical scheme should fall within the protection scope of the utility model technical scheme.

Claims

1. A locking protection device for surface treatment of a part comprising a mandrel assembly (1), characterized in that: The protective cover assembly (2) is arranged on the outer periphery of the mandrel assembly (1), and both ends of the mandrel assembly (1) are connected with the protective cover assembly (2).

2. A locking guard for part surface treatment according to claim 1, characterized in that: The mandrel assembly (1) comprises a first sleeve (11), a second sleeve (12) and an elastic locking piece (13) arranged in the first sleeve (11), the first sleeve (11) is a stepped structure, the second sleeve (12) is arranged on the outer periphery of the smaller end of the first sleeve (11), the elastic locking piece (13) is provided with a locking column (131), the part of the first sleeve (11) and the second sleeve (12) is provided with a locking hole, and the locking column (131) is arranged in the locking hole.

3. A locking guard for part surface treatment according to claim 2, characterized in that: The elastic locking piece (13) is a V-shaped structure and is provided with an arc-shaped transition part (132) in the middle, the inner wall of the first sleeve (11) is provided with a mounting pin (111), the arc-shaped transition part (132) is arranged on the mounting pin (111), and the locking column (131) is arranged on both sides of the elastic locking piece (13).

4. The locking guard for part surface treatment of claim 2, wherein: The elastic locking piece (13) is provided with at least two and is uniformly distributed in the circumferential direction.

5. The locking guard for part surface treatment of claim 1, wherein: The mandrel assembly (1) is provided with a flange (14) at both ends, the flange (14) is provided with a positioning groove (141), the protective cover assembly (2) is provided with a support plate (21) at both ends, and the support plate (21) extends into the positioning groove (141).

6. A locking guard for part surface treatment according to any one of claims 1 to 5, characterized in that: The protective cover assembly (2) comprises at least two cover bodies (22), each cover body (22) is distributed in the circumferential direction, and the joints of two adjacent cover bodies (22) are in a zigzag structure.

7. A locking guard for part surface treatment according to claim 6, characterized in that: A plurality of through holes (221) are formed in the cover body (22).

8. The locking guard for part surface treatment of claim 6, wherein: The locking assembly (3) comprises two cover plates (31) and is arranged at both ends of the protective cover assembly (2), the cover plate (31) is provided with a first connecting lug (32), the cover body (22) is provided with a second connecting lug (23), and the first connecting lug (32) and the second connecting lug (23) are connected by a fastener.

9. The locking guard for part surface treatment of claim 8, wherein: The first connecting lug (32) is in a U-shaped structure, and the second connecting lug (23) of two adjacent cover bodies (22) is located in the first connecting lug (32).

10. The locking guard for part surface treatment of claim 8, wherein: The cover plate (31) is provided with a protrusion (33), and the protrusion (33) abuts against the end of the mandrel assembly (1).

Images