Locking protection device for part surface treatment

Abstract

The invention 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 the two ends of the mandrel rod assembly are connected with the protective cover assembly. When the locking protection device for part surface treatment is used, a part is installed on the mandrel rod assembly, a plurality of parts can be installed according to the axial size of the mandrel rod assembly, so that the 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 without loosening, and the machining quality is improved. 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 invention relates to a mechanical processing fixture, in particular to a locking protection device for part surface treatment, which is suitable for clamping, protecting and locking gears and hollow shaft parts during surface treatment. Background Art

[0002] During the surface treatment process, parts are generally fixed on a rotating workbench or placed in a working tank. With high-speed rotation or rapid vibration during the processing, the fixture is prone to loosening, causing parts to fall off, causing damage to parts, and even processing safety risks. If the clamping is too tight, it is easy to cause parts to be clamped during the processing. At the same time, the single-piece clamping method is also difficult to meet the efficiency requirements of small-batch production of parts. Taking some high-precision gears as an example, in order to meet the requirements of the tooth surface support rate, the parts need to be vibrated and polished. At present, the general practice is to place the parts on the mandrel, insert the threaded fasteners or lock the nuts, and then put them into a bucket filled with zinc particles for vibration polishing. However, this locking method will loosen during long-term vibration, and the parts will fly out and cause damage to the parts, which will also cause safety risks to the operator. In addition, the outside of the parts is not protected. If the zinc bucket is damaged, the surface of the parts will be bumped and scratched, affecting the quality of the parts. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a locking protection device for part surface treatment that does not require direct clamping of the parts, can achieve multi-piece clamping to improve processing efficiency and play a protective role.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A locking protection device for part surface treatment includes a core 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 core rod assembly, and both ends of the core rod assembly are connected to the protective cover assembly.

[0006] As a further improvement of the above technical solution: the core rod assembly includes a first sleeve, a second sleeve and an elastic locking piece arranged in the first sleeve, the first sleeve is a step structure, the second sleeve is sleeved on the outer periphery of the end with a smaller diameter 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 passed through the locking hole.

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

[0008] As a further improvement of the above technical solution: at least two elastic locking members are provided and are evenly distributed along the circumferential direction.

[0009] As a further improvement of the above technical solution: flanges are provided at both ends of the core rod assembly, positioning grooves are provided on the flanges, and support plates are provided at both ends of the protective cover assembly, and the support plates extend into the positioning grooves.

[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 along the circumferential direction, and the seam between two adjacent cover bodies is a serrated structure.

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

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

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

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

[0015] Compared with the prior art, the advantages of the present invention are: the locking protection device for part surface treatment disclosed in the present invention, when in use, the parts are installed on the core rod assembly, and multiple parts can be installed according to the axial size of the core rod assembly, thereby improving processing efficiency. The core rod assembly limits the degree of freedom through the protective cover assembly and the locking assembly, making the locking more secure and not loose. There is no need to clamp the parts directly to avoid pinching injuries. At the same time, the protective cover assembly protects the parts from falling off or bumping during processing, and the structure is reasonable and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a locking protection device for part surface treatment according to the present invention.

[0017] Figure 2 It is a schematic diagram of the main structure of the locking protection device used for part surface treatment of the present invention.

[0018] Figure 3 The invention is a schematic cross-sectional view of the locking protection device used for surface treatment of parts.

[0019] Figure 4It is a schematic diagram of the three-dimensional structure of the elastic locking member in the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the cover plate in the present invention.

[0021] The symbols in the figure represent:

[0022] 1. Core rod assembly; 11. First sleeve; 111. Mounting pin; 12. Second sleeve; 13. Elastic locking member; 131. Locking column; 132. Arc-shaped transition portion; 14. Flange; 141. Positioning groove; 2. Protective cover assembly; 21. Support plate; 22. Cover body; 221. Through hole; 23. Second connecting ear; 3. Locking assembly; 31. Cover plate; 32. First connecting ear; 33. Protrusion. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not 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" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Figures 1 to 5An embodiment of a locking protection device for part surface treatment of the present invention is shown. The locking protection device for part surface treatment of this embodiment includes a core rod assembly 1, a detachable protective cover assembly 2 and a locking assembly 3 for locking the protective cover assembly 2. The protective cover assembly 2 is arranged on the outer periphery of the core rod assembly 1, and both ends of the core rod assembly 1 are connected to the protective cover assembly 2.

[0028] The locking protection device for part surface treatment of this embodiment is used. When the part is installed on the core rod assembly 1, multiple parts can be installed according to the axial size of the core rod assembly 1, thereby improving the processing efficiency. The core rod assembly 1 limits the degree of freedom through the protective cover assembly 2 and the locking assembly 3, so that the locking is more secure and not loose. There is no need to clamp the part directly to avoid pinching injuries. At the same time, the protective cover assembly 2 protects the part from falling off or bumping during processing. The structure is reasonable and effective.

[0029] Furthermore, in this embodiment, the mandrel assembly 1 includes a first sleeve 11, a second sleeve 12 and an elastic locking member 13 disposed in the first sleeve 11. The first sleeve 11 is a step structure, the second sleeve 12 is sleeved on the outer periphery of the end of the first sleeve 11 with a smaller diameter, a locking column 131 is disposed on the elastic locking member 13, and a locking hole is disposed in the sleeved portion of the first sleeve 11 and the second sleeve 12, and the locking column 131 is inserted into the locking hole (not shown in the figure). When in use, the parts are inserted into the first sleeve 11 and / or the second sleeve 12, and then the first sleeve 11 and the second sleeve 12 are sleeved until the end of the second sleeve 12 is tightly pressed 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, and the locking column 131 pops out under the elastic force of the elastic locking member 13 and extends into the locking hole of the second sleeve 12 to achieve locking, thereby preventing the parts from falling off during rotation or vibration. The structure is reasonable and effective. Preferably, the outer diameter of the larger end of the first sleeve 11 is the same as the outer diameter of the second sleeve 12 , and the lock hole on the second sleeve 12 is a blind hole, which can prevent the lock column 131 from extending outside the second sleeve 12 .

[0030] Furthermore, in the present embodiment, the elastic locking member 13 is a V-shaped structure and is provided with an arc-shaped transition portion 132 in the middle. A mounting pin 111 is provided on the inner wall of the first sleeve 11. The arc-shaped transition portion 132 is sleeved on the mounting pin 111. The structure is simple and reasonable, which facilitates the installation of the elastic locking member 13 in the first sleeve 11. At the same time, the position of the locking column 131 can be fine-tuned by rotating relative to the mounting pin 111. The locking column 131 is arranged on both sides of the elastic locking member 13 with good symmetry, which is conducive to ensuring the locking effect between the first sleeve 11 and the second sleeve 12.

[0031] As a preferred embodiment, two elastic locking members 13 are provided and evenly distributed along 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 at all locations along the circumference of the mandrel assembly 1. Of course, in other embodiments, the number of elastic locking members 13 can also be further adjusted.

[0032] Furthermore, in this embodiment, flanges 14 are provided at both ends of the mandrel assembly 1, and positioning grooves 141 are provided on the flanges 14. Support plates 21 are provided at both ends of the shield assembly 2 (specifically, support plates 21 are provided at both ends of the shield body 22), and the support plates 21 extend into the positioning grooves 141. The support plates 21 cooperate with the flanges 14 to provide protection, effectively preventing damage to the parts caused by collisions, etc., and also preventing the first sleeve 11 and the second sleeve 12 from axially moving and disengaging to a certain extent.

[0033] Furthermore, in the present embodiment, the protective cover assembly 2 includes two cover bodies 22. Of course, in other embodiments, the number of cover bodies 22 can be further adjusted. The cover bodies 22 are distributed along the circumferential direction, and the joints between two adjacent cover bodies 22 are serrated structures, so that the cover bodies 22 can be staggered and tightly embraced with each other, and are not easy to fall off during vibration.

[0034] Furthermore, in this embodiment, a plurality of through holes 221 are formed on the cover body 22. The hollow cover body 22 can meet the processing requirements of different parts and facilitate contact and discharge of the medium during processing, such as leakage of sand grains after sandblasting and contact of parts with zinc grains during vibration polishing.

[0035] Furthermore, in this embodiment, the locking assembly 3 includes two cover plates 31 and are respectively arranged at both ends of the protective cover assembly 2. A first connecting ear 32 is provided on the cover plate 31, and a second connecting ear 23 is provided on the cover body 22. The first connecting ear 32 and the second connecting ear 23 are connected by fasteners (such as bolts, screws, etc.), which can effectively lock the protective cover assembly 2 and limit the freedom in all directions. The locking is firm and not easy to loosen, and it is easy to disassemble and assemble.

[0036] As a preferred embodiment, the first connecting ear 32 is a U-shaped structure, and the second connecting ears 23 of two adjacent cover bodies 22 are located inside the first connecting ear 32 , which helps prevent the second connecting ears 23 of the cover body 22 from falling out from the first connecting ear 32 .

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

[0038] In order to meet the tooth surface support rate requirements, some high-precision gears need to be vibrated and polished. The process of vibrating and polishing high-precision gears using the locking protection device for part surface treatment of the present invention is as follows:

[0039] (1) Manufacture locking protection devices for surface treatment of parts as required and inspect them to be qualified;

[0040] (2) Installation of parts: Put the parts on the first sleeve 11 and / or the second sleeve 12, and then sleeve the first sleeve 11 and the second sleeve 12 until the end of the second sleeve 12 is pressed 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, and the locking column 131 pops out under the elastic force of the elastic locking member 13 and extends into the locking hole of the second sleeve 12 to lock it; embed the support plates 21 at the upper and lower ends of the cover body 22 into the positioning grooves 141 at both ends of the core rod assembly 1, and then install the cover plates 31 at both ends. Finally, use fasteners to connect and fix the first connecting ear 32 and the second connecting ear 23.

[0041] (3) Vibration polishing: The entire fixture is placed in a bucket filled with zinc particles for vibration polishing. After the polishing is completed, the cover plate 31, the cover body 22 and the core rod assembly 1 are disassembled to remove the parts.

[0042] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A locking protection device for surface treatment of parts, comprising a mandrel assembly (1), characterized in that: It also comprises a detachable protective cover assembly (2) and a locking assembly (3) for locking the protective cover assembly (2); the protective cover assembly (2) is arranged on the outer periphery of the core rod assembly (1); and both ends of the core rod assembly (1) are connected to the protective cover assembly (2).

2. The locking protection device for part surface treatment according to claim 1, characterized in that: The core rod assembly (1) comprises a first sleeve (11), a second sleeve (12) and an elastic locking member (13) arranged in the first sleeve (11); the first sleeve (11) is a step structure; the second sleeve (12) is sleeved on the outer periphery of the end of the first sleeve (11) with a smaller diameter; a locking column (131) is arranged on the elastic locking member (13); a locking hole is arranged at the portion where the first sleeve (11) and the second sleeve (12) are sleeved; the locking column (131) is inserted into the locking hole.

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

4. The locking protection device for part surface treatment according to claim 2, characterized in that: At least two elastic locking members (13) are provided and are evenly distributed along the circumferential direction.

5. The locking protection device for part surface treatment according to claim 1, characterized in that: The core rod assembly (1) is provided with flanges (14) at both ends, and a positioning groove (141) is provided on the flange (14). The protective cover assembly (2) is provided with support plates (21) at both ends, and the support plates (21) extend into the positioning groove (141).

6. The locking protection device 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 of the cover bodies (22) is distributed along the circumferential direction, and the joint between two adjacent cover bodies (22) is a sawtooth structure.

7. The locking protection device for part surface treatment according to claim 6, characterized in that: The cover body (22) is provided with a plurality of through holes (221).

8. The locking protection device for part surface treatment according to claim 6, characterized in that: The locking assembly (3) comprises two cover plates (31) which are arranged at two ends of the protective cover assembly (2); a first connecting ear (32) is arranged on the cover plate (31); a second connecting ear (23) is arranged on the cover body (22); the first connecting ear (32) and the second connecting ear (23) are connected by a fastener.

9. The locking protection device for part surface treatment according to claim 8, characterized in that: The first connecting ear (32) is a U-shaped structure, and the second connecting ears (23) of two adjacent cover bodies (22) are located inside the first connecting ear (32).

10. The locking protection device for part surface treatment according to claim 8, characterized in that: The cover plate (31) is provided with a protrusion (33), and the protrusion (33) abuts against the end of the core rod assembly (1).

Images