Drawing type elastic limiting pin

Abstract

The utility model relates to a drawing type elastic limiting pin which comprises a supporting seat, a front-back communicated assembly hole is formed in the center position, close to the top, of the front face of the supporting seat, and a guide limiting block is arranged in the assembly hole in a penetrating mode. The center of the guide limiting block is provided with a guide connecting hole which is communicated front and back, and the center of the rear end of the guide limiting block is provided with a vertically arranged first limiting groove and a transversely arranged second limiting groove; positioning devices matched with the guide connecting holes in an inserting manner are arranged in the guide connecting holes; the positioning device comprises an inserting block, a rotary pull head is arranged at the rear end of the inserting block, an ejector rod is arranged in the center of the front end of the inserting block, and the ejector rod is arranged in the guide connecting hole in a penetrating mode. The push-pull type elastic limiting pin is simple in structure, the push rod can rapidly extend forwards through the spring for limiting, the head of the push rod can be rapidly separated from an automobile sheet metal part by rotating the push rod in a half mode and pulling the push rod backwards, operation is easy and convenient, the front-back moving efficiency of the push rod is improved, and then the detection efficiency of the automobile sheet metal part is improved.

Description

Technical Field

[0001] The utility model relates to a positioning device for detecting automobile sheet metal parts, in particular to a pull-out elastic limiting pin. Background Art

[0002] Automobile sheet metal generally refers to the metal shell of the car, mainly including the front hood, rear hood, roof, left front fender, right front fender, left rear fender, right rear fender, left front door, left rear door, right front door, right rear door, left and right longitudinal beams on both sides of the engine compartment, front bumper frame, rear panel inside the rear bumper, rear bumper frame, etc. These sheet metal parts are assembled to form the main metal structure of the car; in order to ensure the assembly accuracy between each component, these automobile sheet metal parts need to undergo accuracy inspection of outline dimensions, opening position lights after production and processing.

[0003] In order to facilitate the inspection of automobile sheet metal parts and improve the inspection efficiency, the current inspection method is to develop a corresponding automobile sheet metal inspection platform for each type of automobile sheet metal part. This type of automobile sheet metal inspection platform mainly includes a contour bracket for mounting and supporting automobile sheet metal parts and a quick-press clamp for clamping and positioning automobile sheet metal parts on the contour bracket. The contour bracket and the quick-press clamp are mainly used for limiting and fixing automobile sheet metal parts in the up and down directions. For limiting the side of the automobile sheet metal part, a push rod that can move back and forth is usually used. The push rod is movably mounted on the support seat in a threaded manner. By rotating the push rod clockwise or counterclockwise, it can be moved back and forth to tighten or loosen the limit on the side of the automobile sheet metal part on the inspection platform; however, when limiting or canceling the limit on the side of the automobile sheet metal part, this side limit device needs to continuously rotate the push rod so that its end gradually presses against the side of the automobile sheet metal part or separates from the side of the automobile sheet metal part. The operation is relatively time-consuming, affecting the inspection efficiency. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a pull-out elastic limiting pin which can realize rapid limiting and releasing of the side surface of an automobile sheet metal part on an automobile sheet metal part inspection platform.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The support frame is fixed with a guide block, and the guide block is fixed with the support frame; the center of the guide block is provided with a guide connection hole connected to the front and rear along its length direction, and the center of the rear end has a first limit groove arranged vertically and a second limit groove arranged horizontally; a positioning device is provided in the guide connection hole, and the positioning device can move back and forth in the guide connection hole; the positioning device includes a plug-in block that can be plug-in and matched with the first limit groove and the second limit groove, and the rear end of the plug-in block is provided with a rotary pull head, and the front end center is provided with a push rod, and the push rod is passed through the guide connection hole, and the rear end of the push rod can be controlled by the rotary pull head to extend out of the rear end of the guide limit block and can also be retracted into the guide connection hole.

[0007] Furthermore, the guide limit block is composed of an external threaded connection part, a limit part and a knob part; the end face of the knob part is a regular hexagonal structure, the end faces of the external threaded connection part and the limit part are both circular structures, and the external threaded connection part and the limit part are respectively arranged at the front and rear ends of the knob part, and are formed as one piece; the guide limit block is threadedly connected to the threaded sleeve arranged in the assembly hole of the support seat through the external threaded connection part; the guide connection hole passes through the center of the end faces of the external threaded connection part, the limit part and the knob part, and is connected front to back, and the first limit groove and the second limit groove are arranged at the rear end of the limit part.

[0008] Furthermore, a fixing nut that is threadably matched with the external threaded connection portion is provided on the outside of the portion of the external threaded connection portion located on the front side of the support seat, and the fixing nut and the knob portion are clamped on the front and rear sides of the support seat.

[0009] Furthermore, the guide connecting hole is composed of an elastic connecting hole and a guide hole connected front and back, and the diameter of the guide hole is smaller than the diameter of the elastic connecting hole; a spring is arranged in the elastic connecting hole, the push rod passes through the spring, and the front end of the push rod is provided with a limiting cap fixedly connected to it, and a limiting retaining ring is arranged on the outside of the push rod between the limiting cap and the spring.

[0010] Furthermore, the outer diameter of the spring is larger than the diameter of the guide hole and smaller than the diameter of the elastic connecting hole; the diameter of the limit ring is larger than the inner diameter of the spring and smaller than the diameter of the elastic connecting hole.

[0011] Furthermore, outwardly protruding protrusions are provided on both sides of the support seat near the bottom, and fixed connection holes communicating with each other from top to bottom are provided on the protrusions.

[0012] Furthermore, the front-to-back depth of the first limiting groove is greater than the front-to-back depth of the second limiting groove.

[0013] Compared with the existing technology, the advantages of the present invention are: this pull-out elastic limit pin has a simple structure, and the side of the automobile sheet metal part can be quickly limited and released through the push rod that can be extended and retracted back and forth. The push rod can be quickly extended forward by the spring to limit the position. By half-turning the push rod and pulling the push rod back, the head of the push rod can be quickly separated from the automobile sheet metal part. The operation is simple, and the efficiency of the forward and backward movement of the push rod is improved, thereby improving the inspection efficiency of automobile sheet metal parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the front axial structure of a pull-out elastic limit pin of the utility model;

[0016] Figure 2 This is a schematic diagram of the front structure of a pull-out elastic limit pin of the utility model;

[0017] Figure 3 yes Figure 2 Structural cross-sectional view of AA in the middle;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of a guide limit block in a pull-out elastic limit pin of the utility model;

[0019] Figure 5 This is a side structural sectional view of a guide limit block in a pull-out elastic limit pin of the utility model;

[0020] Figure 6 The utility model is a three-dimensional structural diagram of a positioning device in a pull-out type elastic limit pin.

[0021] In the figure: 1. Support seat; 11. Fixed connection hole; 12. Assembly hole; 13. Threaded sleeve; 2. Guide limit block; 21. Guide connection hole; 211. Guide hole; 212. Elastic connection hole; 22. External thread connection part; 23. Limiting part; 231. First limiting groove; 232. Second limiting groove; 24. Knob part; 3. Positioning device; 31. Plug-in block; 32. Pull head; 4. Limiting cap; 5. Fixing nut; 6. Limiting ring; 7. Push rod; 8. Spring. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating an orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is typically placed when in use. They are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0024] Furthermore, the use of terms such as "horizontal" and "vertical" does not necessarily imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," not that the structure or component must be perfectly horizontal, but rather that it can be slightly tilted.

[0025] In the description of the embodiments of the present invention, “a plurality of” means at least 2.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] Example

[0028] Please refer to the instruction manual Figures 1 to 3 As shown in the instruction manual, Figures 1 to 3 The figure shows a specific embodiment of a pull-out elastic limit pin of the utility model, which includes a support base 1, the support base 1 is an inverted "T"-shaped structure, and can be fixedly installed on the operating table of the automobile sheet metal inspection platform by bolts, and outward-protruding protrusions are provided on both sides of the support base 1 near the bottom, and the protrusions on both sides are symmetrical to each other, and fixed connection holes 11 connected up and down are provided on the protrusions, and the fixed connection holes 11 are countersunk holes connected up and down or threaded holes connected up and down, which are convenient for matching bolts with threaded holes on the table top of the automobile sheet metal inspection platform to achieve the installation and fixation of the support base 1 on the automobile sheet metal inspection platform; a front-to-back connected assembly hole 12 is provided at the center position near the top of the front of the support base 1, and the assembly hole is a light hole; refer to the attached manual for details. Figure 3 As shown, a guide limit block 2 is passed through the assembly hole 12. It should be noted that the guide limit block 2 is detachably fixed to the support seat 1; the center of the guide limit block 2 is provided with a front-to-rear connected guide connection hole 21 along its length direction, and the rear end center has a vertically arranged first limit groove 231 and a horizontally arranged second limit groove 232, the first limit groove 231 and the second limit groove 232 are crossed in a "cross" shape, and the front-to-rear depth of the first limit groove 231 is greater than the front-to-rear depth of the second limit groove 232, and the guide connection hole 21 passes through the center of the crossed first limit groove 231 and the second limit groove 232; specifically, refer to the appendix of the instruction manual Figure 4 and 5As shown, the guide limit block 2 is composed of an external threaded connection part 22, a limiting part 23 and a knob part 24, wherein the length of the external threaded connection part 22 is longer than the front-to-back length of the support seat 1, and the front-to-back length of the limiting part 23 is less than the front-to-back length of the external threaded connection part 22; the end face of the knob part 24 is a regular hexagonal structure, which is convenient for the operator to rotate with a wrench, and the end faces of the external threaded connection part 22 and the limiting part 23 are both circular structures, wherein the outside of the external threaded connection part 22 is provided with an external thread, and the external threaded connection part 22 and the limiting part 23 are respectively arranged at the front and rear ends of the knob part 24, coaxially arranged, and integrally formed. , the guide connecting hole 21 passes through the center of the end surface of the external threaded connecting part 22, the limiting part 23 and the knob part 24, and is connected front to back. The first limiting groove 231 and the second limiting groove 232 are arranged at the rear end of the limiting part 23; in order to facilitate the installation of the guide limiting block 2 on the support seat 1, the assembly hole 12 of the support seat 1 is embedded with a threaded sleeve 13, which is tightly matched with the assembly hole 12. The guide limiting block 2 is threadedly connected to the threaded sleeve 13 arranged in the assembly hole 12 of the support seat 1 through the external threaded connecting part 22. In order to ensure the stability of the guide limiting block 2 on the support seat 1 and not easy to loosen, refer to the appendix of the instruction manual. Figures 1 to 3 As shown, after the external threaded connection part 22 is screwed together with the threaded sleeve 13, the front side of the knob part 24 conflicts with the back side of the support seat 1, and the front end of the external threaded connection part 22 passes through the support seat 1 and is located outside the front side of the support seat 1. The external threaded connection part 22 is provided with a fixing nut 5 that is threadedly matched with the external threaded connection part 22 at the part on the front side of the support seat 1. The fixing nut 5 is rotated to clamp the fixing nut 5 and the knob part 24 on the front and rear sides of the support seat 1. The back side of the fixing nut 5 conflicts with the front side of the support seat 1. The guide limit block 2 is further stabilized on the support seat 1 by the fixing nut 5 and the knob part 24; further, refer to the appendix of the instruction manual Figure 5 As shown, the guide connection hole 21 is composed of an elastic connection hole 212 and a guide hole 211 connected front and back. The guide hole 211 is located at the center of the end of the knob portion 24, and its rear end is connected to the centers of the first limiting groove 231 and the second limiting groove 232 arranged crosswise. The diameter of the guide hole 211 is smaller than that of the elastic connection hole 212, and it is a stepped hole. A spring 8 is arranged in the elastic connection hole 212, and the spring 8 is arranged front and back. See the appendix of the instruction manual for details. Figure 3 As shown, the outer diameter of the spring 8 is larger than the diameter of the guide hole 211 and smaller than the diameter of the elastic connection hole 212, and the rear end of the spring 8 conflicts with the rear end of the elastic connection hole 212; Figure 3 As shown, the guide connection hole 21 is provided with a positioning device 3 that is plugged in and matched with the guide connection hole 21. The positioning device 3 can move back and forth in the guide connection hole 21. For details, see the appendix of the specification. Figure 6As shown, the positioning device 3 includes a plug-in block 31 that can be plugged into and matched with the first limiting groove 231 and the second limiting groove 232. It should be noted that when working, the plug-in block 31 can only be plugged into the first limiting groove 231 or the second limiting groove 232 alone, and cannot be matched with the first limiting groove 231 and the second limiting groove 232 at the same time. In addition, the front and rear lengths of the plug-in block 31 are consistent with the front and rear groove depths of the first limiting groove 231; a rotary pull head 32 is provided at the rear end of the plug-in block 31, and the rotary pull head 32 is used to facilitate the operation of the plug-in block 31, and the rotary pull head 32 and the plug-in block 31 are an integrated structure, and the plug-in block 31 The front end center is provided with a push rod 7, and the push rod 7 is arranged front and back. The push rod 7 is inserted into the guide connection hole 21. The diameter of the push rod 7 is smaller than the diameter of the guide hole 211, which is convenient for it to move back and forth in the guide connection hole 21; in order to facilitate the disassembly and replacement of the push rod 7 on the plug-in block 31, a threaded connection hole is provided in the end center of the plug-in block 31, and an external thread is provided on the push rod 7 near the rear end to match the threaded connection hole on the end face of the plug-in block 31. The push rod 7 is threadedly connected to the plug-in block 31, which is convenient for disassembly and assembly; in order to cooperate with the guide limit block 2 to realize the forward ejection limit function of the push rod 7, refer to the appendix of the instruction manual. Figure 3 and 6 As shown, the push rod 7 passes through the spring 8. In order to avoid damage to the restricted automobile sheet metal part, the front end of the push rod 7 is provided with a limiting cap 4 fixedly connected thereto. The limiting cap 4 is a plastic part with an arc-shaped head. It is threadedly connected to the push rod 7 and is easy to disassemble and assemble. In order to enable the spring 8 to have a forward tension on the push rod 7 so that the push rod 7 can extend forward, a limiting retaining ring 6 is provided on the outside of the push rod 7 between the limiting cap 4 and the spring 8. The limiting retaining ring 6 limits the position of its front end through the limiting cap 4. The diameter of the limiting retaining ring 6 is larger than the inner diameter of the spring 8 and smaller than the diameter of the elastic connecting hole 212. The front end of the spring 8 conflicts with the back side of the limiting retaining ring 6. Since the rear end of the spring 8 conflicts with the rear end of the elastic connecting hole 212, the position is The locking cam 32 is fixed and the tension of the spring is moved forward in sequence, and its front end drives the limit ring 6 forward, and the limit ring pushes the limit cap 4 forward, and the limit cap 4 drives the top rod 7 fixed to it forward; the rear end of the top rod 7 can be controlled by the rotary pull head 32 to extend out of the rear end outside of the guide limit block 2 and can also be retracted into the guide connection hole 21. It should be noted that when the plug-in block 31 is plugged into the first limit groove 231, at this time, the front end of the limit cap 4 is located outside the front end of the guide limit block 2, and the distance from the front end center of the limit cap 4 to the front end center of the guide limit block 2 is not greater than the front-to-back distance between the bottom of the first limit groove 231 and the bottom of the second limit groove 232, ensuring that when the plug-in block 31 is plugged into the second limit groove 232, the limit cap 4 is completely retracted into the elastic connection hole 212.

[0029] The specific working principle is as follows: when in use, the pull-out elastic limit pin of the utility model is fixedly installed on the automobile sheet metal inspection platform by bolts, and the pull head 32 is pulled backward. The pull head 32 drives the plug-in block 31 and the push rod 7 to move backward synchronously. The spring 8 is compressed by the backward movement of the limit ring 6. After the front end of the plug-in block 31 moves to the rear end of the limiting part 23, the pull head 32 is rotated so that the front end of the plug-in connector 31 corresponds to the rear end position of the first limit groove 231, and then the pull head 32 is slowly released. At this time, the spring 8 releases the tension to its front end, and the spring 8 drives the limit ring 6 and drives the push rod 7 to move forward. The plug-in block 31 moves along the first limit groove 231 until the push rod 7 is pushed forward. The limiting cap 4 at the front end of the rod 7 supports the part of the automobile sheet metal to be limited; when the limit is cancelled, the rotary pull head 32 is also pulled backward first, and the rotary pull head 32 drives the plug block 31 and the push rod 7 to move backward synchronously. The spring 8 is compressed by the backward movement of the limiting retaining ring 6. After the front end of the plug block 31 moves to the rear end of the limiting part 23, the rotary pull head 32 is rotated to make the front end of the plug connector 31 correspond to the rear end position of the second limiting groove 232, and then the rotary pull head 32 is slowly released. Under the tension of the spring 8, the plug connector 31 is pulled by the push rod 7 and inserted into the second limiting groove 232. At this time, the limiting cap 4 retreats into the elastic connecting hole 212, and the limiting cap 4 is separated from the limited part of the automobile sheet metal.

[0030] This pull-out elastic limit pin has a simple structure. It can quickly limit and release the side of the automobile sheet metal part through the push rod 7 that can be extended and retracted forward and backward. The push rod can be quickly extended forward by the spring 8 to limit the position. By half-turning the push rod 7 and pulling the push rod 7 backward, its head can be quickly separated from the automobile sheet metal part. It is easy to operate, improves the efficiency of the forward and backward movement of the push rod 7, and thus improves the inspection efficiency of automobile sheet metal parts.

[0031] It should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pull-out elastic limit pin, comprising a support seat (1), characterized in that: A front-to-back connected assembly hole (12) is provided at a center position near the top of the front face of the support seat (1), a guide limit block (2) is passed through the assembly hole (12), and the guide limit block (2) is fixedly connected to the support seat (1); a front-to-back connected guide connection hole (21) is provided at the center of the guide limit block (2) along its length direction, and a first limit groove (231) arranged vertically and a second limit groove (232) arranged horizontally are provided at the center of the rear end; a positioning device (3) is provided in the guide connection hole (21) to be plugged in and matched with the guide connection hole (21), and the guide limit block (21) is fixedly connected to the support seat (1). The positioning device (3) can move forward and backward in the guide connection hole (21); the positioning device (3) includes a plug-in block (31) that can be plugged into and matched with the first limiting groove (231) and the second limiting groove (232); a rotary pull head (32) is provided at the rear end of the plug-in block (31), and a push rod (7) is provided at the center of the front end; the push rod (7) is inserted into the guide connection hole (21); the rear end of the push rod (7) can be controlled by the rotary pull head (32) to extend outside the rear end of the guide limiting block (2) or to retract into the guide connection hole (21).

2. The pull-out elastic limit pin according to claim 1, characterized in that: The guide limit block (2) is composed of an external thread connection part (22), a limit part (23) and a knob part (24); the end face of the knob part (24) is a regular hexagonal structure, the end faces of the external thread connection part (22) and the limit part (23) are both circular structures, and the external thread connection part (22) and the limit part (23) are respectively arranged at the front and rear ends of the knob part (24) and are integrally formed; the guide limit block (2) is threadedly connected to a threaded sleeve (13) arranged in the assembly hole (12) of the support seat (1) through the external thread connection part (22); the guide connection hole (21) passes through the center of the end faces of the external thread connection part (22), the limit part (23) and the knob part (24), and is connected front to back, and the first limit groove (231) and the second limit groove (232) are arranged at the rear end of the limit part (23).

3. The pull-out elastic limit pin according to claim 2, characterized in that: A fixing nut (5) threadedly matched with the external threaded connection portion (22) is provided on the outside of the portion located on the front of the support seat (1). The fixing nut (5) and the knob portion (24) are clamped on the front and rear sides of the support seat (1).

4. The pull-out elastic limit pin according to claim 1, characterized in that: The guide connection hole (21) is composed of an elastic connection hole (212) and a guide hole (211) that are connected front and back, and the diameter of the guide hole (211) is smaller than the diameter of the elastic connection hole (212); a spring (8) is arranged in the elastic connection hole (212), the push rod (7) passes through the spring (8), a limiting cap (4) fixedly connected to the push rod (7) is arranged at the front end of the push rod (7), and a limiting retaining ring (6) is arranged outside the push rod (7) between the limiting cap (4) and the spring (8).

5. The pull-out elastic limit pin according to claim 4, characterized in that: The outer diameter of the spring (8) is greater than the diameter of the guide hole (211) and smaller than the diameter of the elastic connection hole (212); the diameter of the limit ring (6) is greater than the inner diameter of the spring (8) and smaller than the diameter of the elastic connection hole (212).

6. The pull-out elastic limit pin according to claim 1, characterized in that: Outwardly protruding protrusions are provided on both sides of the support seat (1) near the bottom, and fixed connection holes (11) communicating with each other from top to bottom are provided on the protrusions.

7. The pull-out elastic limit pin according to claim 1, characterized in that: The front-to-back depth of the first limiting groove (231) is greater than the front-to-back depth of the second limiting groove (232).

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