A front subframe sleeve assembly fixture for automobiles

Abstract

This utility model relates to the field of automotive manufacturing technology, specifically to a jig for assembling front subframe sleeves. The jig includes a fixed frame with two first cylinders mounted on it. One end of each first cylinder is fixedly connected to a movable frame, and both movable frames are detachably connected to positioning pins. The two first cylinders can drive the two positioning pins closer together. The fixed frame has two limiting parts, and a second cylinder is fixedly connected to it. The output end of the second cylinder is fixedly connected to a limiting block. When the limiting block is in the first working position, it is positioned between one of the movable frames and the corresponding limiting part, shortening the stroke of the movable frame and the corresponding positioning pin to accommodate the positioning of a long sleeve. When a short sleeve needs to be fitted, the second cylinder retracts, adjusting the limiting block to the second working position. The limiting block does not obstruct the movement of the movable frame; the stroke of the movable frame is only limited by the limiting part, thus accommodating the positioning of the short sleeve.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to an automobile front subframe sleeve assembly fixture. Background Technology

[0002] The front subframe is an important component of a car. To facilitate its connection with the car body, a sleeve needs to be welded to each of the four corners of the front subframe, with two of the sleeves being shorter than the other two.

[0003] Currently, the sleeves on the front subframe are typically clamped and positioned using a sleeve clamp before being welded to the corresponding position on the front subframe body. Existing sleeve clamps include an upper clamp and a lower clamp. These clamps bring two locating pins closer together, which are then inserted into the upper and lower ends of the sleeve. The two locating pins together clamp the sleeve, thus positioning it to facilitate welding to the front subframe body.

[0004] While existing sleeve clamps can hold and position sleeves, some problems exist during use. First, because two of the sleeves on the front subframe are shorter than the other two, existing sleeve clamps can only accommodate sleeves of a single length and cannot handle sleeves of different lengths. Second, because some sleeves have different inner diameters, the required locating pin diameters differ, but these differences are subtle and difficult to distinguish visually, making it easy for operators to pick the wrong locating pin. Utility Model Content

[0005] To address the aforementioned deficiencies, the technical problem to be solved by this utility model is to provide an automotive front subframe sleeve assembly fixture that can accommodate and hold two sleeves of different lengths.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A front subframe sleeve assembly fixture for automobiles includes a fixed frame with two first cylinders mounted on it. One end of each first cylinder is fixedly connected to the fixed frame, and the other end is fixedly connected to a movable frame. Positioning pins are detachably connected to both movable frames, and the two positioning pins are coaxially arranged. The two first cylinders can drive the two positioning pins closer together. The fixed frame has two limiting parts, each corresponding to one of the two movable frames. The limiting parts are located on the path of the corresponding movable frame moving towards the other movable frame. A second cylinder is fixedly connected to the fixed frame, and a limiting block is fixedly connected to its output end. The limiting block has a first working position and a second working position. When the limiting block is in the first working position, it is located between one of the movable frames and the corresponding limiting part. When the limiting block is in the second working position, it is located outside the movement path of the movable frame.

[0008] By adopting the above scheme, during use, the two first cylinders can drive the movable frame to move, thereby driving the two positioning pins to move closer together. The two positioning pins insert into the sleeve to clamp it, thus achieving sleeve clamping and positioning. When a long sleeve needs to be fitted, the distance between the two positioning pins is longer, and the stroke of the first cylinder driving the positioning pins is shorter. Therefore, the second cylinder extends, adjusting the limit stop to the first working position. When the limit stop is in the first working position, it is located between one of the movable frames and the corresponding limiting part. The stroke of the movable frame is limited by the limit stop, shortening the stroke of the movable frame and the corresponding positioning pin, thus increasing the distance between the two positioning pins to accommodate the positioning of the long sleeve. When a short sleeve needs to be fitted, the distance between the two positioning pins is even shorter, meaning the stroke of the positioning pins is longer. Therefore, the second cylinder retracts, adjusting the limit stop to the second working position. The limit stop does not obstruct the movement of the movable frame; the stroke of the movable frame is only limited by the limiting part, thus accommodating the positioning of the short sleeve.

[0009] Preferably, the movable frame is slidably mounted on the fixed frame. Because the movable frame is slidably mounted on the fixed frame, the operation of the cylinder and the movable frame is more stable.

[0010] Preferably, the positioning pin includes a positioning head, a positioning boss, and a connecting post connected in sequence. The movable frame has a mounting hole, and the connecting post passes through the mounting hole. A nut is threaded onto the connecting post, and the nut and the positioning boss together clamp the movable frame. The positioning head is used to insert into the sleeve, and the positioning boss is used to abut against the end of the sleeve. The threaded connection between the nut and the connecting post facilitates the installation and removal of the positioning pin.

[0011] Preferably, the end of the positioning head is tapered.

[0012] Preferably, the end of the connecting post furthest from the positioning boss is connected to an extension post. By providing the extension post, the overall length of the connecting post can be changed. Connecting posts can be used to accommodate positioning pins of different diameters, facilitating the identification of positioning pins of different diameters. The extension post is correspondingly positioned to a positioning head of a specific diameter, allowing the positioning pins to be distinguished by their length characteristics.

[0013] Preferably, a mistake-proofing mechanism is also included. This mechanism comprises a mounting base and a proximity switch. The mounting base has a first positioning rib and a second positioning rib, and the first positioning rib has a slot. When the positioning head is engaged in the slot, the positioning boss is located between the first and second positioning ribs. The detection end of the proximity switch corresponds to the end of the connecting post furthest from the positioning head. The detection end of the proximity switch can detect objects at a specific distance, facilitating the identification of positioning pins of specific lengths and determining whether the correct pin is being used, thus preventing incorrect placement. Before installing the positioning pin onto the movable frame, the positioning pin is placed into the mistake-proofing mechanism to prevent incorrect placement.

[0014] Preferably, an arc-shaped retainer is fixedly connected to the second positioning rib. The retainer is coaxially arranged with the slot and allows the connecting column to be inserted into the inner side.

[0015] Preferably, the cross-section of the retaining bracket is arc-shaped, and the retaining bracket is an elastic element. The elastic retaining bracket can clamp the connecting post, facilitating the limiting of the connecting post.

[0016] Preferably, the card holder has guide portions at both ends along its arc length, and these guide portions are bent outwards towards the card holder. The guiding action of these guide portions facilitates the insertion of the connecting post into the inside of the card holder.

[0017] Preferably, the mounting base is a groove-shaped structure with the opening facing upwards, and a cover plate is hinged to one end of the mounting base, with the free end of the cover plate resting on the top of the other end of the mounting base. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any novel effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention from a frontal view.

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention from a frontal view (the second cylinder and the limiting block are hidden).

[0021] Figure 3 This is a three-dimensional structural diagram of the present invention from a rear view.

[0022] Figure 4 This is the front view of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the present invention in operation;

[0024] Figure 6 This is a three-dimensional structural diagram of the error-proofing mechanism in this utility model;

[0025] Figure 7 This is a schematic diagram of the internal structure of the error-proofing mechanism in this utility model;

[0026] Figure 8 This is a structural diagram of a locating pin;

[0027] Figure 9 This is a three-dimensional structural diagram of the front subframe in the background art.

[0028] The reference numerals in the attached drawings include: fixed frame 1, first cylinder 2, movable frame 3, frame body 301, support 302, positioning pin 4, positioning head 401, positioning boss 402, connecting column 403, extension column 404, limiting part 5, second cylinder 6, limiting block 7, error prevention mechanism 8, mounting base 801, proximity switch 802, first positioning rib 803, second positioning rib 804, slot 805, card seat 806, guide part 807, cover plate 808, front subframe 9, sleeve 10, slide rail 11, slider 12. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-9 The present invention will be further described in detail below with reference to specific embodiments.

[0030] Please see Figure 1-9This embodiment provides an automotive front subframe sleeve assembly fixture, including a fixed frame 1. The fixed frame 1 has two first cylinders 2 arranged vertically, and the piston rods of both first cylinders 2 are fixedly connected to movable frames 3. One end of each first cylinder 2 is fixedly connected to the fixed frame 1. The piston rod of the upper first cylinder 2 faces downwards and is fixedly connected to the movable frame 3, and its cylinder body is fixedly connected to the corresponding fixed frame 1. The piston rod of the lower first cylinder 2 faces downwards and is fixedly connected to the corresponding movable frame 3, and its cylinder body is fixedly connected to the fixed frame 1. Positioning pins 4 are detachably connected to both movable frames 3. The two positioning pins 4 are coaxially arranged, and the two first cylinders 2 can drive the two movable frames 3 closer together to bring the two positioning pins 4 closer together. The fixed frame 1 has two limiting parts 5, which are arranged one-to-one with the two movable frames 3, and are located on the path of the corresponding movable frame 3 moving towards the other movable frame 3. A second cylinder 6 is fixedly connected to the fixed frame 1. A limit block 7 is fixedly connected to the output end of the second cylinder 6. The limit block 7 has a first working position and a second working position. The second cylinder 6 is used to drive the limit block 7 to switch between the first working position and the second working position. When the limit block 7 is in the first working position, the limit block 7 is located between the lower movable frame 3 and the corresponding limiting part 5; when the limit block 7 is in the second working position, the limit block 7 is located outside the movement path of the movable frame 3.

[0031] Please continue reading. Figure 1 and Figure 2 To enhance the stability of the movable frame 3, in some embodiments, the movable frame 3 is slidably mounted on the fixed frame 1. Specifically, a slider 12 is fixedly connected to the rear side of the movable frame 3, and a slide rail 11 is fixedly connected to the front side of the fixed frame 1, with the slider 12 slidably connected to the slide rail 11.

[0032] Please see Figure 8 The positioning pin 4 includes a positioning head 401, a positioning boss 402, and a connecting post 403 connected sequentially from top to bottom. The diameter of the positioning boss 402 is larger than the diameters of the positioning head 401 and the connecting post 403. The movable frame 3 has mounting holes, and the connecting post 403 passes through these holes. A nut is threaded onto the connecting post 403, and the nut, together with the positioning boss 402, clamps the movable frame 3. Specifically, the movable frame 3 includes a frame body 301 and a support 302. The frame body 301 is fixedly connected to the slider 12 and slidably mounted on the fixed frame 1 via the slider 12 and the slide rail 11. The support 302 is fixedly connected to the front side of the frame body 301, and the mounting hole is specifically formed on the support 302. The nut and the positioning boss 402 together clamp the support 302, thereby fixing the positioning pin 4 to the movable frame 3.

[0033] Please see Figure 1The left end of the frame body 301 corresponds to the limiting part 5. When the frame body 301 on the upper side moves downward, it can be stopped by the limiting part 5 on the lower side, thereby limiting the stroke of the positioning pin 4. When the left end of the frame body 301 on the lower side moves upward, it can be blocked by the corresponding limiting part 5, thereby limiting the stroke of the positioning pin 4 on the lower side.

[0034] Figure 8 The document describes three different lengths of locating pins 4, with slight differences in the diameter of the locating head 401 of each pin. Please refer to the following documentation. Figure 8 The end of the positioning head 401 is tapered, and the end of the connecting post 403 away from the positioning boss 402 is connected to an extension post 404. In order to facilitate the differentiation of positioning pins 4 of different diameters, the length of the connecting post 403 can also be set to different lengths to facilitate the identification of positioning pins 4 of different diameters.

[0035] Please see Figure 6 and Figure 7 To prevent operators from accidentally using the wrong positioning pin 4 during operation, a mistake-proofing mechanism 8 is also included. This mechanism 8 includes a mounting base 801 and a proximity switch 802. The mounting base 801 has a first positioning rib 803 and a second positioning rib 804. The first positioning rib 803 has a slot 805. When the positioning head 401 is engaged in the slot 805, the positioning boss 402 is located between the first positioning rib 803 and the second positioning rib 804, and the detection end of the proximity switch 802 corresponds to the end of the connecting post 403 furthest from the positioning head 401. An arc-shaped retainer 806 is fixedly connected to the second positioning rib 804. The retainer 806 is coaxially arranged with the slot 805, and its opening faces upwards, allowing the connecting post 403 to be engaged inside. The retainer 806 has a curved cross-section and is an elastic element. The card holder 806 has guide portions 807 at both ends in the arc direction, and the guide portions 807 are bent towards the outside of the card holder 806. When the connecting post 403 of the positioning pin 4 is engaged in the card holder 806, the guide portion 807 can guide the connecting post 403 to be engaged in the inside of the card holder 806. The mounting base 801 is a slot-shaped body with the opening facing upward. The upper rear end of the mounting base 801 is hinged to a cover plate 808, and the front end of the cover plate 808 rests on the top of the front end of the mounting base 801. In order to facilitate the identification of multiple positioning pins 4, five card slots 805, five card holders 806 and five proximity switches 802 are provided in this embodiment. The error prevention mechanism 8 can be specifically set on the fixed frame 1.

[0036] For operating principles, please refer to [link / reference]. Figure 5In use, first, place the positioning pin 4 into the error-proof mechanism 8, and use the proximity switch 802 to detect whether it is the required positioning pin 4 to prevent the wrong positioning pin 4 from being taken. Then, fix the confirmed positioning pin 4 on the corresponding movable frame 3. With the front subframe 9 pre-fixed, the two first cylinders 2 can drive the movable frame 3 to move, thereby driving the upper and lower positioning pins 4 to move closer to each other. By inserting the two positioning pins 4 into the sleeve 10, the sleeve 10 can be clamped, thereby achieving clamping and positioning of the sleeve 10. When a long sleeve 10 needs to be adapted, the distance between the two positioning pins 4 is longer, and the stroke of the first cylinder 2 driving the positioning pin 4 is shorter. Then, the second cylinder 6 extends, thereby adjusting the limit block 7 to the first working position. When the limit block 7 is in the first working position, the limit block 7 is located between one of the movable frames 3 and the corresponding limit part 5. The travel of the movable frame 3 is limited by the limiting block 7, which shortens the travel of the movable frame 3 and the corresponding positioning pin 4, thereby increasing the distance between the two positioning pins 4 to accommodate the positioning of the long sleeve 10. When it is necessary to adapt to the short sleeve 10, the distance between the two positioning pins 4 is even shorter, that is, the travel of the positioning pins 4 is even longer. In this case, the second cylinder 6 needs to retract, thereby adjusting the limiting block 7 to the second working position. The limiting block 7 does not obstruct the movement of the movable frame 3; the travel of the movable frame 3 is only limited by the limiting part 5, thus adapting to the positioning of the short sleeve 10.

[0037] It should be noted that words indicating direction in this article, such as "up" and "down," are all in the format of "upper" and "lower." Figure 1 The direction setting is for ease of description only and has no other specific meaning.

[0038] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0039] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An automobile front subframe sleeve assembly jig characterized by, The system includes a fixed frame (1), on which two first cylinders (2) are mounted. One end of each first cylinder (2) is fixedly connected to the fixed frame (1), and the other end of each first cylinder (2) is fixedly connected to a movable frame (3). Positioning pins (4) are detachably connected to each of the two movable frames (3). The two positioning pins (4) are coaxially arranged, and the two first cylinders (2) can drive the two positioning pins (4) to move closer to each other. The fixed frame (1) is provided with two limiting parts (5), which correspond one-to-one with the two movable frames (3). (5) Located on the path of the corresponding movable frame (3) moving toward another movable frame (3), the fixed frame (1) is fixedly connected to a second cylinder (6), and the output end of the second cylinder (6) is fixedly connected to a limit block (7). The limit block (7) has a first working position and a second working position. When the limit block (7) is in the first working position, the limit block (7) is located between one of the movable frames (3) and the corresponding limit part (5). When the limit block (7) is in the second working position, the limit block (7) is located outside the movement path of the movable frame (3).

2. The assembly fixture for a tubular subframe of an automobile according to claim 1, wherein The movable frame (3) is slidably mounted on the fixed frame (1).

3. The assembly fixture for a tubular subframe of a vehicle according to claim 1, wherein The positioning pin (4) includes a positioning head (401), a positioning boss (402) and a connecting column (403) connected in sequence. The movable frame (3) is provided with a mounting hole. The connecting column (403) passes through the mounting hole. The connecting column (403) is threaded with a nut. The nut and the positioning boss (402) together clamp the movable frame (3).

4. The assembly fixture for a tubular subframe of an automobile according to claim 3, wherein The end of the positioning head (401) is tapered.

5. The assembly fixture for a tubular subframe of an automobile according to claim 3, wherein An extension post (404) is connected to the end of the connecting post (403) away from the positioning boss (402).

6. A motor vehicle front subframe sleeve assembly fixture according to any one of claims 3-5, characterized in that, It also includes a fault-prevention mechanism (8), which includes a mounting base (801) and a proximity switch (802). The mounting base (801) is provided with a first positioning rib (803) and a second positioning rib (804). The first positioning rib (803) is provided with a slot (805). When the positioning head (401) is inserted into the slot (805), the positioning boss (402) is located between the first positioning rib (803) and the second positioning rib (804). The detection end of the proximity switch (802) corresponds to the end of the connecting post (403) away from the positioning head (401).

7. The automotive front subframe sleeve assembly fixture of claim 6, wherein, An arc-shaped card holder (806) is fixedly connected to the second positioning rib (804). The card holder (806) is coaxially arranged with the card slot (805). The card holder (806) allows the connecting column (403) to be inserted into the inner side.

8. The assembly fixture for a tubular subframe of an automobile according to claim 7, wherein The cross-section of the card holder (806) is arc-shaped, and the card holder (806) is an elastic element.

9. The automotive front subframe sleeve assembly fixture of claim 8, wherein, The card holder (806) is provided with guide portions (807) at both ends in the arc length direction, and the guide portions (807) are bent toward the outside of the card holder (806).

10. The assembly fixture for a tubular subframe of an automobile according to claim 6, wherein The mounting seat (801) is a groove with an opening facing upwards, one end of the mounting seat (801) is hinged with a cover plate (808), and the free end of the cover plate (808) is abutted on the top of the other end of the mounting seat (801).

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