Press-fitting and positioning mechanism for automobile back-row headrest pin

Abstract

The utility model discloses an automobile back-row headrest pin press-fitting positioning mechanism which comprises a working table, a supporting seat, two material carrying dies, a pressing plate, a pressing block, a guide rod, a tension spring, a linear telescopic air cylinder and a positioning block, the supporting seat is fixedly installed on the working table, and the two material carrying dies are symmetrically and fixedly installed on the left side and the right side of the supporting seat; the material carrying die is provided with a semicircular die cavity, a guide sleeve is fixedly arranged on the supporting base, and the pressing plate is arranged on the material carrying die in a lap joint mode. According to the mechanism, the positioning block can be pushed by the linear telescopic air cylinder to enter the semicircular mold cavity to position the placement direction of the pin, so that the press-fitting precision is improved, meanwhile, after the positioning block retracts, the press-fitting operation of the pin and the headrest body cannot be affected, and the pin is pressed through the pressing effect of the pressing block on the pressing plate on the pin; the pin can be prevented from being upwarped when pushed by the pressing rod, the matching precision of the pin and the headrest body mounting hole is improved, and then the pressing efficiency of the pin is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of press-fitting pins of rear-row headrests of automobiles, in particular to a press-fitting positioning mechanism for pins of rear-row headrests of automobiles. Background Art

[0002] As an indispensable part of a car, the car headrest is mainly assembled from a headrest body and a pin. The pin has the function of adjusting the height of the headrest body. A limit groove is set on the pin, and its press-fitting operation needs to follow the correct direction. The existing press-fitting tools use manual judgment to adjust the direction of the pin limit groove, which has the disadvantages of low efficiency and low press-fitting accuracy. In addition, when the pin is placed in a semicircular mold cavity and is pushed quickly by the press-fitting mechanism, the pin is offset due to force, and the head of the pin that matches the mounting hole of the headrest body will be tilted upward, resulting in the pin being unable to be press-fitted and fixed in the mounting hole of the headrest body. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a mechanism capable of quickly positioning the press-fitting direction of a headrest pin and limiting the freedom of the pin in the up-and-down direction when being press-fitted, so as to avoid the pin from tilting up during fast operation.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a press-fit positioning mechanism for the pin of the rear headrest of an automobile, comprising a workbench, a support seat, a loading die, a pressure plate, a pressure block, a guide rod, a tension spring, a linear telescopic cylinder and a positioning block, the support seat is fixedly mounted on the workbench, two loading dies are symmetrically and fixedly mounted on the left and right sides of the support seat, the loading die is provided with a semicircular die cavity, a guide sleeve is fixedly arranged on the support seat, the pressure plate is placed on the loading die, the upper end of the guide rod is fixedly mounted on the pressure plate, the lower end of the guide rod is slidably mounted in the guide sleeve, and the tension spring is sleeved and installed On the guide rod, the upper and lower ends of the tension spring are fixedly connected to the pressure plate and the guide sleeve respectively, the pressure block is fixedly installed at both ends of the pressure plate, the bottom surface of the pressure block is set to a first protrusion structure that matches the top groove of the pin, the cylinder bodies of the two linear telescopic cylinders are fixedly installed on the support seat, the thickness of the loading mold is provided with a guide notch that matches the positioning block, the positioning block is slidably installed in the guide notch of the loading mold, the front end of the positioning block can be placed in the semicircular mold cavity, the rear end of the positioning block is fixedly connected to the piston rod of the linear telescopic cylinder, and the inner end of the positioning block is set to a second protrusion that matches the side groove of the pin.

[0005] Preferably, a cover plate for sealing the top of the guide notch is screwed onto the loading die.

[0006] Preferably, a hexagonal plum hand screw is threadedly installed on the top of the guide rod.

[0007] Preferably, the edges of the top surface of the semicircular mold cavity are arranged as bevel structures.

[0008] Compared with the prior art, the advantages of the utility model are: this mechanism can push the positioning block into the semicircular mold cavity through the linear telescopic cylinder to position the placement direction of the pin, so as to improve the pressing accuracy. At the same time, the positioning block will not affect the pressing operation of the pin and the headrest body after retraction. The pressing effect of the pressing block on the pressure plate on the pin can prevent the pin from tilting upward when pushed by the pressure rod, thereby improving the matching accuracy of the pin and the mounting hole of the headrest body, thereby improving the pressing efficiency of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings.

[0010] Figure 1 It is a structural schematic diagram of the utility model with pins and a headrest.

[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at M.

[0012] Figure 3 Structural schematic diagram of the utility model without pins and headrest.

[0013] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at N. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with specific implementation methods:

[0015] like Figures 1 to 4The illustrated embodiment of a press-fitting and positioning mechanism for a rear headrest pin of an automobile comprises a workbench 1, a support seat 2, a loading die 21, a pressing plate 3, a pressing block 31, a guide rod 4, a tension spring 5, a linear telescopic cylinder 6 and a positioning block 62. The support seat 2 is fixedly mounted on the workbench 1, two loading dies 21 are symmetrically and fixedly mounted on the left and right sides of the support seat 2, the loading die 21 is provided with a semicircular die cavity 22, a guide sleeve is fixedly arranged on the support seat 2, the pressing plate 3 is placed on the loading die 21, the upper end of the guide rod 4 is fixedly mounted on the pressing plate 3, the lower end of the guide rod 4 is slidably mounted in the guide sleeve, the tension spring 5 is sleeved and mounted on the guide rod 4, and the upper and lower ends of the tension spring 5 are respectively fixed to the pressing plate 3 and the guide sleeve. Fixed connection, the pressure block 31 is fixedly installed at both ends of the pressure plate 3, the bottom surface of the pressure block 31 is set to a first protrusion structure that matches the top groove of the pin 8, the cylinder bodies of the two linear telescopic cylinders 6 are fixedly installed on the support seat 2, the thickness of the loading mold 21 is provided with a guide notch that matches the positioning block 62, the guide notch has an upper opening, which is convenient for the positioning block 61 to be slidably embedded in the guide notch, the positioning block 62 is slidably installed in the guide notch of the loading mold 21, the front end of the positioning block 62 can be placed in the semicircular mold cavity 22, the rear end of the positioning block 62 is fixedly connected to the piston rod of the linear telescopic cylinder 6, and the inner end of the positioning block 62 is set to a second protrusion that matches the side groove of the pin 8.

[0016] A cover plate 61 for sealing the top of the guide notch is screwed onto the loading die 21 . The cover plate 61 can limit the freedom of upward movement of the positioning block 62 , thereby preventing the positioning block 62 from deviating in the up and down directions during use.

[0017] The top of the guide rod 4 is threaded with a hexagonal plum hand screw to facilitate the operator to pull the combination of the guide rod 4 and the pressure plate 3 upward.

[0018] The top edge of the semicircular mold cavity 22 is configured as an oblique angle structure to facilitate embedding and placing the pin 8 in the semicircular mold cavity 22 .

[0019] The pressing plate 7 is slidably mounted on the linear slide rail 71, and the linear slider 71 and the headrest clamp 9 are both fixedly mounted on the workbench 1. A pressing rod 72 is fixedly mounted on the inner end of the pressing plate 7, and the pressing rod 72 is coaxially arranged with the semicircular cavity 22. The linear telescopic cylinder 6 is started to push the front end of the positioning block 62 to be placed in the semicircular cavity 22. A driving mechanism connected to the pressing plate 7 is also provided on the workbench 1. The operator pulls up the combination of the guide rod 4 and the pressing plate 3, and embeds the two pins 8 into the semicircular cavity 22 of the loading die 21. The guide rod 4 is released, and the pressing plate 3 is reset under the action of the spring. The pressing blocks 31 at both ends of the pressing plate 3 are embedded in the top of the pin 8. In the groove, the positioning block 62 is embedded in the groove on the side of the pin 8, so that the installation direction of the pin 8 can be determined, and the installation accuracy is improved. After the positioning is completed, the linear telescopic cylinder 6 pulls the positioning block 62 back to make its front end disengage from the semicircular mold cavity 22 to avoid affecting the sliding of the pin 8 in the semicircular mold cavity 22 during press-fitting. The headrest body 10 is fixed in the headrest clamp 9, and the driving mechanism is started to push the pressing plate 7 along the linear slide rail 71 to approach the headrest body 10. After the pressure rod 72 contacts the pin 8, it is pressed into the headrest body 10. Under the action of the tension spring 5, it can ensure that the pressure block 31 is always pressed on the pin 8, thereby limiting its freedom in the up and down directions.

Claims

1. A pin press-fit positioning mechanism for a rear headrest of an automobile, characterized in that: The invention comprises a workbench (1), a support seat (2), a material loading die (21), a pressure plate (3), a pressure block (31), a guide rod (4), a tension spring (5), a linear telescopic cylinder (6) and a positioning block (62), wherein the support seat (2) is fixedly mounted on the workbench (1), two material loading dies (21) are symmetrically and fixedly mounted on the left and right sides of the support seat (2), the material loading die (21) is provided with a semicircular die cavity (22), a guide sleeve is fixedly mounted on the support seat (2), the pressure plate (3) is placed on the material loading die (21), the upper end of the guide rod (4) is fixedly mounted on the pressure plate (3), the lower end of the guide rod (4) is slidably mounted in the guide sleeve, the tension spring (5) is sleeved and mounted on the guide rod (4), and the upper and lower ends of the tension spring (5) are The two ends are fixedly connected to the pressing plate (3) and the guide sleeve respectively. The pressing block (31) is fixedly mounted on the two ends of the pressing plate (3). The bottom surface of the pressing block (31) is arranged as a first protrusion structure matching with the top groove of the pin (8). The cylinder bodies of the two linear telescopic cylinders (6) are fixedly mounted on the support seat (2). The thickness of the loading die (21) is provided with a guide notch matching with the positioning block (62). The positioning block (62) is slidably mounted in the guide notch of the loading die (21). The front end of the positioning block (62) can be placed in the semicircular mold cavity (22). The rear end of the positioning block (62) is fixedly connected to the piston rod of the linear telescopic cylinder (6). The inner end of the positioning block (62) is arranged as a second protrusion matching with the side groove of the pin (8).

2. The pin press-fit positioning mechanism for the rear headrest of an automobile according to claim 1, characterized in that: A cover plate (61) for sealing the top of the guide notch is screwed onto the material loading die (21).

3. The pin press-fit positioning mechanism for the rear headrest of an automobile according to claim 1, characterized in that: The top of the guide rod (4) is threadedly mounted with a hexagonal plum hand screw.

4. The pin press-fit positioning mechanism for the rear headrest of an automobile according to claim 1, characterized in that: The top edge of the semicircular mold cavity (22) is arranged as a bevel structure.

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