Automobile door lock gear shaft injection molding fixing device

Abstract

The utility model discloses an automobile door lock gear shaft injection molding fixing device which comprises a lower fixing sleeve, an upper fixing sleeve is arranged at the top of the lower fixing sleeve, and an elastic clamping fixing sleeve is arranged at the bottom of the upper fixing sleeve. The lower fixing sleeve comprises a first sleeve, a first limiting block is fixedly arranged on the inner wall of the first sleeve, a second limiting block is fixedly arranged on the inner wall of the first limiting block, and a limiting groove is formed in the top of the first sleeve; the upper fixing sleeve comprises a second sleeve; according to the automobile door lock gear shaft injection molding fixing device, sufficient fixing force is obtained through the large side wall area, the fixing stability of the device is improved, meanwhile, the machining cost is reduced, and the practical value of the device is increased; the elastic clamping pieces can be greatly deformed due to the arrangement of the partition gaps, stress concentration of the elastic clamping pieces is reduced through the round holes, the outer diameter of the elastic clamping pieces is smaller than that of the fixing cylinder, receding space is provided for insertion of the shaft parts, and the elastic clamping pieces are convenient to incline outwards to clamp the shaft parts.

Description

Technical Field

[0001] The utility model belongs to the field of injection mold shaft hardware implantation, in particular to an injection molding fixing device for a gear shaft of an automobile door lock. Background Art

[0002] The existing fixing methods are: 1. Air suction fixing design; 2. Magnetic fixing design; 3. Front mold oil cylinder floating top design. The disadvantages of the three design schemes are as follows: 1. The air suction fixing design generates different pulling forces due to different shaft diameters, and the fixing force is too small for smaller shafts. 2. The magnetic fixing design has limitations on shaft materials, and the fixing force generated is related to the size of the shaft. For smaller shafts, the fixing force is too small and the shaft will be magnetized. 3. The front mold oil cylinder floating top design, because of the addition of the front mold oil cylinder push plate mechanism design, the mold thickness is greatly increased. For vertical machines with implant advantages, the mold with complex structure will face the situation that the mold thickness exceeds the specification and cannot be used. The floating top design is added, and the core entry and core pulling actions are added in each cycle, which increases the injection molding cycle. It has an advantage in strength, but the structure is complex. In principle, it still directly provides Z-direction constraints.

[0003] Therefore, a new type of automobile door lock gear shaft injection molding fixing device is needed to solve the problems of small fixing force, unstable fixing and hardware magnetization in the fixing structure, while not increasing the mold thickness and cycle, and having the characteristics of low processing cost and high stability. Utility Model Content

[0004] The utility model aims to provide an injection molding fixing device for a gear shaft of a car door lock, so as to solve the problems existing in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device for injection molding and fixing a gear shaft of a car door lock comprises a lower fixing sleeve, an upper fixing sleeve is arranged on the top of the lower fixing sleeve, and an elastic clamping fixing sleeve is arranged on the bottom of the upper fixing sleeve; the lower fixing sleeve comprises a first sleeve, a first limit block is fixedly arranged on the inner wall of the first sleeve, a second limit block is fixedly arranged on the inner wall of the first limit block, and a limit groove is arranged on the top of the first sleeve; the upper fixing sleeve comprises a second sleeve, and a limit seat is fixedly arranged on the bottom of the second sleeve; the elastic clamping fixing sleeve comprises a fixing cylinder, four elastic clips are evenly fixedly arranged on the top circumference of the fixing cylinder, partition gaps are arranged between the elastic clips, a circular hole is arranged at the bottom of the elastic clip, and a clamping wall is arranged on the inner side of the elastic clip.

[0007] Furthermore: the fixing tube is pluggably connected to the first sleeve.

[0008] Furthermore: the first sleeve and the second sleeve are both made of Ruigang material.

[0009] Furthermore: the elastic clip and the fixing tube are integrally formed, and the fixing tube is made of SiMnA steel material.

[0010] Furthermore: the outer diameter of the elastic clip is smaller than the outer diameter of the fixing tube.

[0011] Furthermore: the first limiting block and the second limiting block are both cylindrical.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The elastic clip hole adopts interference fit. After the shaft parts are inserted, the clamping wall provides friction force to provide constraints for the shaft parts in the vertical direction. The design of the elastic clip frictionally fixing the shaft parts indirectly provides constraints. Based on the characteristics that the implanted shaft parts generally have a small cross-sectional area and a long shaft length, the device obtains sufficient fixing force through a large side wall area, improves the fixing stability of the device, reduces processing costs, and increases the practical value of the device.

[0014] The setting of the partition gap enables the elastic clip to change shape significantly, the round hole reduces the stress concentration of the elastic clip, and the outer diameter of the elastic clip is smaller than the fixed tube, providing space for the insertion of shaft parts, making it easier for the elastic clip to tilt outward to clamp the shaft parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of an injection molding fixing device for a gear shaft of a car door lock described in the utility model;

[0017] Figure 2 It is an isometric view of an injection molding fixing device for a gear shaft of a car door lock according to the utility model;

[0018] Figure 3 It is a partial cross-sectional view of a lower fixing sleeve of an injection molding fixing device for a gear shaft of a door lock of an automobile described in the utility model;

[0019] Figure 4 It is a partial cross-sectional view of an upper fixing sleeve of an injection molding fixing device for a gear shaft of a door lock of an automobile described in the utility model;

[0020] Figure 5The utility model is a schematic structural diagram of an elastic clamping fixing sleeve of an injection molding fixing device for a gear shaft of a door lock of an automobile.

[0021] In the accompanying drawings: 1. lower fixing sleeve; 101. first sleeve; 102. first limit block; 103. second limit block; 104. limit groove; 2. upper fixing sleeve; 201. second sleeve; 202. limit seat; 3. elastic clamping fixing sleeve; 301. fixing sleeve; 302. elastic clip; 303. partition gap; 304. round hole; 305. clamping wall; 4. shaft parts. DETAILED DESCRIPTION

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 5, an injection molding fixing device for a car door lock gear shaft comprises a lower fixing sleeve 1, an upper fixing sleeve 2 is arranged on the top of the lower fixing sleeve 1, and an elastic clamping fixing sleeve 3 is arranged on the bottom of the upper fixing sleeve 2.

[0026] In this embodiment: the lower fixing sleeve 1 includes a first sleeve 101, a first limiting block 102 is fixedly arranged on the inner wall of the first sleeve 101, a second limiting block 103 is fixedly arranged on the inner wall of the first limiting block 102, a limiting groove 104 is arranged on the top of the first sleeve 101, the first limiting block 102 and the second limiting block 103 are both cylindrical, when in use, the elastic clamping fixing sleeve 3 is placed in the limiting groove 104 of the first sleeve 101, the shaft parts 4 pass through the second sleeve 201 and the fixing sleeve 301 respectively, the bottom end of the shaft parts 4 is low against the top of the second limiting block 103, and the first sleeve 101 positions the shaft parts 4 to ensure the verticality of their axes;

[0027] In this embodiment: the upper fixed sleeve 2 includes a second sleeve 201, a limit seat 202 is fixedly arranged at the bottom of the second sleeve 201, the first sleeve 101 and the second sleeve 201 are both made of 1.2344 Swiss steel, the second sleeve 201 is located at the top of the first sleeve 101, the limit seat 202 is against the top surface of the first sleeve 101, and the second sleeve 201 provides a horizontal positioning function;

[0028] In this embodiment, the elastic clamping fixing sleeve 3 includes a fixing cylinder 301, four elastic clips 302 are evenly fixedly arranged on the top circumference of the fixing cylinder 301, a partition gap 303 is arranged between the elastic clips 302, a round hole 304 is arranged at the bottom of the elastic clip 302, a clamping wall 305 is arranged on the inner side of the elastic clip 302, the fixing cylinder 301 is connected with the first sleeve 101 by plugging and unplugging, the elastic clip 302 and the fixing cylinder 301 are integrally formed, the fixing cylinder 301 is made of 60SiMnA steel material, the outer diameter of the elastic clip 302 is smaller than the outer diameter of the fixing cylinder 301, the elastic clip 302 hole adopts interference fit, after the shaft part 4 is inserted, the clamping wall 305 provides friction The force is provided to provide constraint for the shaft parts 4 in the vertical direction. The setting of the partition gap 303 enables the elastic clip 302 to change its shape to a larger extent. The circular hole 304 reduces the stress concentration of the elastic clip 302. The outer diameter of the elastic clip 302 is smaller than the fixing tube 301, which provides a clearance space for the insertion of the shaft parts 4, and is convenient for the elastic clip 302 to tilt outward to clamp the shaft parts 4. The design of the elastic clip 302 to frictionally fix the shaft parts 4 indirectly provides constraint. Based on the characteristics of the implanted shaft parts 4, which generally have a small cross-sectional area and a long shaft length, the device obtains sufficient fixing force through a large side wall area, thereby improving the fixing stability of the device, while reducing the processing cost and increasing the practical value of the device.

[0029] Working principle: When in use, the elastic clamping fixing sleeve 3 is placed in the limiting groove 104 of the first sleeve 101, the second sleeve 201 is located on the top of the first sleeve 101, the limiting seat 202 is against the top surface of the first sleeve 101, the shaft parts 4 pass through the second sleeve 201 and the fixing sleeve 301 respectively, the bottom end of the shaft parts 4 is low against the top of the second limiting block 103, the first sleeve 101 positions the shaft parts 4 to ensure the verticality of the axis, the second sleeve 201 provides horizontal positioning, the elastic clip 302 adopts interference fit in the hole, after the shaft parts 4 are inserted, the clamping wall 305 provides friction, which provides vertical support for the shaft parts 4 The circular hole 304 reduces the stress concentration of the elastic clip 302. The outer diameter of the elastic clip 302 is smaller than the fixed tube 301, which provides space for the insertion of the shaft parts 4, and facilitates the elastic clip 302 to tilt outward to clamp the shaft parts 4. The design of the elastic clip 302 frictionally fixing the shaft parts 4 indirectly provides constraints. Based on the characteristics of the implanted shaft parts 4, which generally have a small cross-sectional area and a long shaft length, the device obtains sufficient fixing force through a large side wall area, thereby improving the fixing stability of the device, while reducing processing costs and increasing the practical value of the device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding fixing device for a car door lock gear shaft, characterized in that: It comprises a lower fixing sleeve (1), an upper fixing sleeve (2) is arranged on the top of the lower fixing sleeve (1), and an elastic clamping fixing sleeve (3) is arranged on the bottom of the upper fixing sleeve (2); The lower fixed sleeve (1) comprises a first sleeve (101), a first limit block (102) is fixedly arranged on the inner wall of the first sleeve (101), a second limit block (103) is fixedly arranged on the inner wall of the first limit block (102), and a limit groove (104) is arranged on the top of the first sleeve (101); The upper fixing sleeve (2) comprises a second sleeve (201), and a limiting seat (202) is fixedly provided at the bottom of the second sleeve (201); The elastic clamping fixing sleeve (3) comprises a fixing tube (301), four elastic clips (302) are evenly and fixedly arranged on the top circumference of the fixing tube (301), partition gaps (303) are arranged between the elastic clips (302), a circular hole (304) is arranged at the bottom of the elastic clips (302), and a clamping wall (305) is arranged inside the elastic clips (302).

2. The automobile door lock gear shaft injection molding fixing device according to claim 1, characterized in that: The fixing cylinder (301) is pluggably connected to the first sleeve (101).

3. The automobile door lock gear shaft injection molding fixing device according to claim 1, characterized in that: The first sleeve (101) and the second sleeve (201) are both made of 1.2344 Swisssteel.

4. The automobile door lock gear shaft injection molding fixing device according to claim 1, characterized in that: The elastic clip (302) and the fixing tube (301) are integrally formed, and the fixing tube (301) is made of 60SiMnA steel material.

5. The automobile door lock gear shaft injection molding fixing device according to claim 1, characterized in that: The outer diameter of the elastic clip (302) is smaller than the outer diameter of the fixing tube (301).

6. The automobile door lock gear shaft injection molding fixing device according to claim 1, characterized in that: The first limiting block (102) and the second limiting block (103) are both cylindrical.

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