Jacking device for fine detection of engine hood

Abstract

The utility model relates to a jacking device for fine detection of an engine hood. The jacking device is composed of a push-pull mechanism, a lifting mechanism and a supporting rod. The push-pull mechanism consists of a fixed seat, a push-pull arm and a connecting arm; one end of the push-pull arm is hinged with the lower end of the front surface of the fixed seat, and the other end is provided with a handle; the lower end of the connecting arm is hinged with the push-pull arm; a guide sleeve is arranged at the upper end of the fixed seat; the lifting mechanism comprises a push-pull rod, and the lower end of the push-pull rod penetrates through the guide sleeve downwards and is hinged to the upper end of the connecting arm; the supporting rod is vertically connected to the upper end of the push-pull rod. According to the engine hood fine detection jacking device, the position of the push-pull arm can be limited through the limiting mechanism, then adjustment of the height positions of the push-pull rod and the supporting rod is achieved, fine adjustment of the height positions of the push-pull rod and the supporting rod can be achieved by rotating the supporting rod, the position adjustment precision in the height direction is higher, and the bottom of an automobile engine hood can be better matched and supported; it is guaranteed that the bottom of the automobile engine hood is not prone to deformation due to excessive jacking, operation is convenient, and universality is high.

Description

Technical Field

[0001] The utility model relates to the field of automobile engine hood detection, in particular to an engine hood precision inspection and pressing device. Background Art

[0002] The car hood is one of the important components of a car. It is relatively large and is mostly made by stamping metal sheets.

[0003] After the car hood is processed, it needs to be precision tested. The conventional testing method is to install the processed car hood on a special car hood testing platform. The testing platform usually consists of a support device for supporting the car hood and a quick-press clamp or splint for fixing the car hood on the support device; the contour shape of the support device matches the contour of the bottom edge of the car hood, which facilitates the precise placement of the car hood on the support device, and then clamped to the top of the car hood by a quick-press clamp or splint, so that the car hood is fixed on the car hood testing platform.

[0004] Because automobile hoods are relatively large and primarily formed by stamping metal sheets, to prevent deformation caused by pressure from quick-press clamps or clamps, a hood inspection platform is typically equipped with a pressing device that corresponds to each set of quick-press clamps or clamps. This ensures that the hood is evenly stressed and resists deformation when secured to the platform. However, existing hood pressing devices are specifically designed and manufactured for each model of automobile hood. These pressing devices primarily consist of a base, a push-pull mechanism mounted on the base, and a support column that moves up and down via the push-pull mechanism. The support column supports the bottom of the automobile hood upward. However, these support columns cannot be locally adjusted in height and can only be adjusted by replacing the base. If the height of the support column is incorrectly adjusted, excessive upward movement can easily damage the bottom of the automobile hood, resulting in product defects and poor quality. Furthermore, these devices are not universally applicable. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide an engine hood precision inspection and pressing device which can realize large-scale adjustment of height position and convenient fine adjustment at the same time.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The cam is hingedly connected to the front lower end of the fixing seat, and the other end is provided with a handle; the connecting arm is vertically arranged, and its lower end is hingedly connected to the push-pull arm; the upper end of the front of the fixing seat is provided with a guide sleeve, and the upper end of the connecting arm corresponds to the guide sleeve up and down, and the lifting mechanism is movably arranged in the guide sleeve up and down; the lifting mechanism includes a push-pull rod, which is vertically inserted into the guide sleeve, and its lower end passes downward through the guide sleeve and is hingedly connected to the upper end of the connecting arm. Pushing or pulling the push-pull arm up and down can drive the push-pull rod to move up and down through the connecting arm; the support rod is detachably connected vertically to the upper end of the push-pull rod, and the push-pull rod can drive the support rod to move up and down synchronously.

[0008] Furthermore, the fixing seat is provided with fixing holes connected front to back, an upper support arm integrally formed therewith is provided at the front near the top, and a lower support arm integrally formed therewith is provided at the front near the bottom, the push-pull arm is connected to the lower support arm through the main shaft, and the lower end of the connecting arm is hinged to the position of the push-pull arm above the main shaft; the upper support arm is provided with a guide connecting hole connected up and down, and the guide sleeve is fixedly installed in the guide connecting hole.

[0009] Furthermore, a limiting mechanism capable of limiting the position of the push-pull arm is provided on the fixed seat; the limiting mechanism is composed of a gear and a limiting rod, the gear is fixed to one end of the main shaft, the limiting rod is axially connected to the lower support arm, and the bottom of the limiting rod is provided with a limiting tooth that can correspond to the tooth surface at the top of the gear and the tooth shape is consistent.

[0010] Furthermore, the lower end of the push-pull rod is provided with a hinge joint integrally formed therewith, the hinge joint is vertically flat, and the side surface of the hinge joint is provided with axial connection holes communicating on both sides, and the upper end of the connecting arm is movably connected to the hinge joint by a pin shaft passing through the axial connection hole; the diameter of the part above the hinge joint on the push-pull rod is smaller than the front and rear length of the hinge joint, and is an inverted "T" shape; the part above the hinge joint on the push-pull rod is sleeved with a micro ball bushing, and the micro ball bushing is sleeved and matched with the guide sleeve, and the micro ball bushing can move up and down relative to the guide sleeve; the push-pull rod is threadedly connected to the support rod bracket.

[0011] Furthermore, a lower connecting hole is provided at the bottom center of the support rod, and the lower connecting hole is a threaded hole. An external thread is provided on the outside of the push-pull rod from the middle to the top, and the external thread portion constitutes a first threaded portion, and the first threaded portion is threadedly engaged with the lower connecting hole; an external thread is provided on the outside of the push-pull rod between the first threaded portion and the micro ball bushing, and the external thread portion constitutes a second threaded portion, and the second threaded portion is provided with a second limiting nut threadedly engaged with the second thread, and the second limiting nut conflicts with the top of the micro ball bushing.

[0012] Furthermore, the outer diameter of the thread of the second threaded portion is greater than the outer diameter of the thread of the first threaded portion; the first threaded portion is provided with a first limiting nut that matches its thread, and the top of the first limiting nut conflicts with the bottom of the support rod.

[0013] Furthermore, an upper joint is provided on the top of the support rod, and a plastic cap made of plastic material is sleeved on the upper joint.

[0014] Furthermore, a socket hole is provided in the bottom of the plastic cap; a limit head is provided at the top center of the upper joint, and the limit head is socket-fitted with the socket hole.

[0015] Furthermore, the limiting head has a "T"-shaped structure, which is composed of a limiting protrusion and a connecting column arranged at the bottom center of the limiting protrusion. The connecting column and the limiting protrusion are integrally formed, and the outer side of the limiting protrusion has an arc-shaped structure. The outside of the connecting column is provided with an external thread, and the top center of the upper joint is provided with an upper connecting hole. The upper connecting hole is an internal threaded hole, which is threadedly matched with the connecting column.

[0016] Furthermore, the connecting arm is a crescent-shaped structure.

[0017] Compared with the existing technology, the benefits of the present invention are: this engine hood precision inspection and top pressure device can limit the position of the push-pull arm through the limiting mechanism, thereby realizing the adjustment of the height position of the push-pull rod and the support rod, and the push-pull rod can be made to move up and down more flexibly through the micro ball bushing, and its height position can be fine-tuned by rotating the support rod, so that its height direction position adjustment accuracy is higher, and it can better cooperate and support the bottom of the car engine hood, ensuring that the bottom of the car engine hood is not easily deformed due to excessive top pressure, and it is easy to operate and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an engine hood precision inspection and top pressure device of the utility model;

[0020] Figure 2 This is a schematic diagram of the push-pull mechanism structure in a precision inspection and top-pressing device for an engine hood of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the limiting mechanism in the engine hood precision inspection and top pressure device of the utility model;

[0022] Figure 4 This is a side structural sectional view of an engine hood precision inspection and top pressure device of the utility model;

[0023] Figure 5 yes Figure 4 A magnified view of the structure of middle A;

[0024] Figure 6 This is a partial structural cross-sectional view of the assembled miniature ball bushing, guide sleeve and push-pull rod in the utility model;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of a specific implementation scheme of the utility model;

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of a specific implementation scheme of the present utility model.

[0027] In the figure: 1. Push-pull mechanism; 11. Fixing seat; 111. Lower support arm; 112. Upper support arm; 1121. Guide connecting hole; 113. Fixing hole; 114. Push-pull arm; 115. Connecting arm; 116. Handle; 12. Limiting mechanism; 121. Spindle; 122. Gear; 123. Limiting rod; 124. Limiting tooth; 2. Lifting mechanism; 21. Push-pull rod; 211. First threaded portion; 2 12. Second threaded portion; 213. Hinge joint; 214. Shaft connection hole; 22. Second limiting nut; 3. Strut; 31. Lower connection hole; 32. Upper joint; 321. Upper connection hole; 33. Limiting head; 331. Limiting protrusion; 332. Connecting column; 4. Plastic cap; 41. Socket connection hole; 5. First limiting nut; 6. Guide sleeve; 7. Micro ball bushing; 8. Support seat; 9. Automobile engine hood. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] In the description of the embodiments of the present invention, “a plurality of” means at least 2.

[0032] 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.

[0033] Example

[0034] Please refer to the instruction manual Figure 1 As shown in the instruction manual, Figure 1 The utility model is a specific embodiment of an engine hood precision inspection and pressing device, which is composed of a push-pull mechanism 1, a lifting mechanism 2 and a support rod 3; Figure 2 As shown, the push-pull mechanism 1 is composed of a fixed seat 11, a push-pull arm 114 and a connecting arm 115; specifically, the fixed seat 11 is a vertical plate-shaped structure, which is usually fixedly installed on a Figure 8 On the support base 8 shown, the fixing base 11 is installed on the side of the support base 8. In order to facilitate the fixed connection and disassembly between the fixing base 11 and the support base 8, the fixing base 11 is provided with fixing holes 113 connected front and back. The fixing holes 113 have at least three and are arranged in a triangular structure. The positions of the fixing holes 113 correspond to the positions of the threaded connection holes preset on the support base 8. They are fixed together by bolts, and the connection is stable and reliable; an upper support arm 112 integrally formed with the fixing base 11 is provided near the top of the front side, and the upper support arm 112 is horizontally arranged; a lower support arm 111 integrally formed with the fixing base 11 is provided near the bottom of the front side, and the lower support arm 111 is parallel to the upper support arm 112 up and down, and the lower support arm 111, the upper support arm 112 and the fixing base 11 form a "["-shaped structure; one end of the push-pull arm 114 is connected to the fixing base 1 The lower end of the front side of 1 is hingedly connected. Specifically, the push-pull arm 114 is axially connected to the lower support arm 111 through the main shaft 121. The push-pull arm 114 can swing up and down relative to the lower support arm 111 through the main shaft 121. In order to facilitate manual driving of the push-pull arm 114, a handle 116 is provided on the other end of the push-pull arm 114 relative to the main shaft 121. The handle 116 is fixedly connected to the push-pull arm 114, which is convenient for pushing the push-pull arm 114 upward or pulling the push-pull arm 114 downward with the main shaft 121 as the center; the connecting arm 115 is a crescent-shaped structure, which is vertically arranged with one side bent outward. The lower end of the connecting arm 115 is hingedly connected to the push-pull arm 114, and the lower end of the connecting arm 115 is hingedly connected to the push-pull arm 114 at a position above the main shaft 121. When the push-pull arm 114 is pushed up or pulled down, the connecting arm 115 can be driven to move upward or downward; refer to the appendix of the instruction manual for details. Figure 1 and 2As shown, a guide sleeve 6 is provided at the upper end of the front side of the fixing seat 11. Specifically, the guide sleeve 6 is provided on the upper support arm 112. The upper support arm 112 is provided with a guide connection hole 1121 that is communicated with the upper and lower parts. The guide sleeve 6 is fixedly installed in the guide connection hole 1121. In order to facilitate the fixed installation and disassembly of the guide sleeve 6 in the guide connection hole 1121, the guide connection hole 1121 is a threaded hole. The outside of the guide sleeve 6 is provided with an external thread that is threadedly matched with the guide connection hole 1121. The guide sleeve 6 is screwed and fixed in the guide connection hole 1121; the upper end of the connecting arm 115 corresponds to the guide sleeve 6 up and down, and the lifting mechanism 2 is movably provided in the guide sleeve 6 up and down, and the lower end of the lifting mechanism 2 passes downward through the guide sleeve 6 and is hingedly connected to the upper end of the connecting arm 115; specifically, refer to the appendix of the instruction manual. Figure 1 and 4 As shown, the lifting mechanism 2 includes a push-pull rod 21, which is vertically arranged and passes through the guide sleeve 6. The lower end of the push-pull rod 21 passes downward through the guide sleeve 6 and is hingedly connected to the upper end of the connecting arm 115. Pushing or pulling the push-pull arm 114 up or down can drive the push-pull rod 21 to move up and down through the connecting arm 115; refer to the appendix of the manual for details. Figure 1 and 4As shown, the lower end of the push-pull rod 21 is provided with a hinge joint 213 integrally formed with it, and the hinge joint 213 is vertically flat. The diameter of the part above the hinge joint 213 on the push-pull rod 21 is smaller than the front and rear length of the hinge joint 213, forming an inverted "T" shape. The hinge joint 213 plays a limiting role; the hinge joint 213 is located below the bottom of the guide sleeve 6, and its side is provided with an axial connection hole 214 communicating on both sides, and the upper end of the connecting arm 115 is movably connected to the hinge joint 213 through a pin shaft passed through the axial connection hole 214; in order to make the push-pull rod 21 move up and down more smoothly and flexibly in the guide sleeve 6, the part above the hinge joint 213 on the push-pull rod 21 is sleeved with a micro ball bushing 7, and the micro ball bushing 7 is tightly fitted with the push-pull rod 21, and the lower end conflicts with the top of the hinge joint 213. The upper and lower heights of the micro ball bushing 7 are greater than the upper and lower movement of the push-pull rod 21 The maximum stroke during movement, the micro ball bushing 7 is sleeved and matched with the guide sleeve 6, and the micro ball bushing 7 can move up and down relative to the guide sleeve 6; the push-pull rod 21 is provided with an external thread on the outside of a section from the middle to the top, and the external thread portion constitutes a first threaded portion 211, and the push-pull rod 21 is provided with an external thread on the outside of the portion between the first threaded portion 211 and the micro ball bushing 7, and the external thread portion constitutes a second threaded portion 212, and the thread outer diameter of the second threaded portion 212 is larger than the thread outer diameter of the first threaded portion 211. In order to ensure that the micro ball bushing 7 is more firmly positioned on the push-pull rod 21, a second limiting nut 22 is provided on the second threaded portion 212 to cooperate with its thread, and the second limiting nut 22 conflicts with the top of the micro ball bushing 7, and the micro ball bushing 7 is fixedly clamped between the second limiting nut 22 and the hinge head 213; refer to the appendix of the instruction manual Figure 4 As shown, the support rod 3 is detachably connected vertically to the upper end of the push-pull rod 21, and is coaxially arranged up and down. Specifically, the push-pull rod 21 is threadedly connected to the support rod 3 bracket, which is convenient for disassembly and assembly. The push-pull rod 21 can drive the support rod 3 to move synchronously up and down.

[0035] In order to facilitate the detachable connection between the push-pull rod 21 and the support rod 3, please refer to the appendix of the manual. Figure 4 As shown, a lower connecting hole 31 is provided at the bottom center of the support rod 3, and the lower connecting hole 31 is a threaded hole. The first threaded portion 211 on the push-pull rod 21 is threadedly engaged with the lower connecting hole 31. The length of the first threaded portion 211 is longer than the length of the lower connecting hole 31. Screwing the support rod 3 can achieve fine-tuning of its height on the push-pull rod 21; in order to ensure the stability of the height position of the support rod 3 on the push-pull rod 21, a first limiting nut 5 is provided on the first threaded portion 211 and is threadedly engaged with it. The top of the first limiting nut 5 conflicts with the bottom of the support rod 3, and the first limiting nut 5 serves to limit the position of the support rod 3.

[0036] In order to ensure the support strength, the push-pull rod 21 and the support rod 3 are both metal parts. In order to prevent the support rod 3 from being too hard and damaging the car hood being pressed, the top of the support rod 3 is provided with a plastic cap 4 made of plastic material. The plastic cap 4 has a certain elasticity. In order to facilitate the installation and removal of the plastic cap 4 on the top of the support rod 3, refer to the appendix of the instruction manual. Figure 1 , 4 and 5, the top of the support rod 3 is provided with an upper joint 32, the upper joint 32 and the support rod 3 are integrally formed, the diameter of the upper joint 32 is smaller than the diameter of the support rod 3, the plastic cap 4 is sleeved on the upper joint 32, in order to ensure that the plastic cap 4 is stable and reliable after installation on the upper joint 32, not easy to slip off, and also easy to disassemble, refer to the instructions attached Figure 5 As shown, a sleeve hole 41 is provided in the bottom of the plastic cap 4; the cross section of the sleeve hole 41 is a "T"-shaped structure, and a limit head 33 is provided at the top center of the upper joint 32. The limit head 33 and the upper joint 32 form a "T"-shaped structure, which is consistent with the structure of the sleeve hole 41. Since the plastic cap 4 has a certain elasticity, it is convenient to install the upper end of the upper joint 32 of the limit head 33 and plug it into the sleeve hole 41. See the attached manual for details. Figure 5 As shown, the limit head 33 is a "T"-shaped structure, which is composed of a limit protrusion 331 and a connecting column 332 arranged at the bottom center of the limit protrusion 331. The connecting column 332 and the limit protrusion 331 are integrally formed, and the outer side of the limit protrusion 331 is an arc-shaped structure, which is convenient for embedding into the socket hole 41 and also convenient for removing the plastic cap 4 from the upper joint 32; in order to ensure that the limit head 33 can be stably and reliably installed on the upper joint 32 and convenient for disassembly, the outside of the connecting column 332 is provided with an external thread, and the top center of the upper joint 32 is provided with an upper connecting hole 321, which is an internal threaded hole, which is threadedly matched with the connecting column 332, and the limit head 33 is socketed with the socket hole 41.

[0037] In order to limit the rotation angle of the push-pull arm 114, it is convenient to control the height of the lifting mechanism 2 and then the height of the support rod 3. Figure 1 and 2 As shown, the fixing seat 11 is provided with a limiting mechanism 12 capable of limiting the position of the push-pull arm 114; Figure 3 As shown, the limiting mechanism 12 is composed of a gear 122 and a limiting rod 123. The gear 122 is fixed to one end of the main shaft 121 and is located on the outside of the push-pull arm 114. The limiting rod 123 is axially connected to the lower support arm 111, and corresponds to the gear 122 front and back. In order to limit the rotation of the gear 122 by the limiting rod 123, a limiting tooth 124 is provided at the bottom of the limiting rod 123, which can correspond to the tooth surface at the top of the gear 122 up and down and the tooth shape is consistent.

[0038] When in use, the engine hood precision inspection and pressing device of the present invention is fixed on the support seat 8 by bolts, as shown in FIG. Figure 7 and 8 As shown, the support base 8 is fixedly installed at the specified position of the automobile engine hood inspection platform by bolts, and the automobile engine hood 9 is placed on the supporting device of the automobile engine hood inspection platform. The engine hood precision inspection pressing device installed on the support base 8 is located below the bottom of the automobile engine hood 9. Then the operator manually pushes the push-pull arm 114 upward through the handle 116, and the push-pull arm 114 drives the connecting arm 115 to push upward. The connecting arm 115 drives the push-pull rod 21 connected to it upward. At the same time, the push-pull rod 21 drives the support rod 3 at its top to push upward, so that the top surface of the plastic cap 4 at the top of the support rod 3 contacts the bottom surface of the automobile engine hood 9, and then the limiting rod 123 is lowered so that the limiting tooth 124 at its bottom is stuck on the gear 122, which limits the position of the gear 122, thereby limiting the main shaft 12 through the gear 122. When the support rod 3 is lifted up to the highest position, the plastic cap 4 on its top has not yet touched the bottom of the car hood 9, and the first limit nut 5 is screwed up to support the support rod 3, thereby stopping the support rod 3. If the support rod 3 is pressed against the bottom of the car hood 9, the limit rod 123 is separated from the gear 122, and the push-pull arm 114 is pulled down by the handle 116. The push-pull arm 114 drives the connecting arm 115 downward, and the push-pull rod 21 connected thereto is driven down by the connecting arm 115. The push-pull rod 21 drives the support rod 3 on its top to drop synchronously, so that the plastic cap 4 on its top is separated from the bottom surface of the car hood 9, thereby releasing the pressure.

[0039] This engine hood precision inspection and pressing device can limit the position of the push-pull arm 114 through the limiting mechanism 12, thereby realizing the adjustment of the height position of the push-pull rod 21 and the support rod 3. The push-pull rod 21 can be made to move up and down more flexibly through the micro ball bushing 7. The height position can be fine-tuned by rotating the support rod 3, so that the height direction position adjustment accuracy is higher, and it can better cooperate with and support the bottom of the automobile engine hood 9, ensuring that the bottom of the automobile engine hood 9 is not easily deformed due to excessive pressing. It is easy to operate and has strong versatility.

[0040] 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. An engine hood precision inspection and pressing device, characterized by: The invention is composed of a push-pull mechanism (1), a lifting mechanism (2) and a support rod (3); the push-pull mechanism (1) is composed of a fixed seat (11), a push-pull arm (114) and a connecting arm (115); one end of the push-pull arm (114) is hingedly connected to the lower end of the front face of the fixed seat (11), and the other end is provided with a handle (116); the connecting arm (115) is vertically arranged, and its lower end is hingedly connected to the push-pull arm (114); the upper end of the front face of the fixed seat (11) is provided with a guide sleeve (6), and the upper end of the connecting arm (115) corresponds to the guide sleeve (6) in the upper and lower directions. The lifting mechanism (2) is movably arranged in the guide sleeve (6) up and down; the lifting mechanism (2) includes a push-pull rod (21), the push-pull rod (21) is vertically inserted into the guide sleeve (6), the lower end of the push-pull rod (21) passes through the guide sleeve (6) downward and is hingedly connected to the upper end of the connecting arm (115), and the push-pull arm (114) can be pushed up or pulled down to drive the push-pull rod (21) to move up and down through the connecting arm (115); the support rod (3) is detachably connected vertically to the upper end of the push-pull rod (21), and the push-pull rod (21) can drive the support rod (3) to move up and down synchronously.

2. The engine hood precision inspection and pressing device according to claim 1, characterized in that: The fixing seat (11) is provided with a fixing hole (113) connected frontally and rearward, an upper support arm (112) formed integrally with the fixing seat is provided at a position near the top of the front, and a lower support arm (111) formed integrally with the fixing seat is provided at a position near the bottom of the front, the push-pull arm (114) is axially connected to the lower support arm (111) through a main shaft (121), and the lower end of the connecting arm (115) is hinged to a portion of the push-pull arm (114) located above the main shaft (121); the upper support arm (112) is provided with a guide connecting hole (1121) connected upper and lower, and the guide sleeve (6) is fixedly installed in the guide connecting hole (1121).

3. The engine hood precision inspection and pressing device according to claim 2, characterized in that: The fixing seat (11) is provided with a limiting mechanism (12) capable of limiting the position of the push-pull arm (114); the limiting mechanism (12) is composed of a gear (122) and a limiting rod (123); the gear (122) is fixed to one end of the main shaft (121); the limiting rod (123) is axially connected to the lower support arm (111); and the bottom of the limiting rod (123) is provided with a limiting tooth (124) capable of corresponding to the tooth profile of the top of the gear (122) and having a matching tooth profile.

4. The engine hood precision inspection and pressing device according to claim 1, characterized in that: The lower end of the push-pull rod (21) is provided with a hinge joint (213) integrally formed therewith, the hinge joint (213) is vertically flat, and the side of the hinge joint (213) is provided with an axial connection hole (214) communicating on both sides, and the upper end of the connecting arm (115) is movably connected to the hinge joint (213) through a pin shaft passing through the axial connection hole (214); the diameter of the portion of the push-pull rod (21) located above the hinge joint (213) is smaller than the front-to-back length of the hinge joint (213), and is in an inverted "T" shape; the portion of the push-pull rod (21) located above the hinge joint (213) is sleeved with a micro ball bushing (7), the micro ball bushing (7) is sleeved with the guide sleeve (6), and the micro ball bushing (7) can move up and down relative to the guide sleeve (6); the push-pull rod (21) is threadedly connected to the support rod (3) bracket.

5. The engine hood precision inspection and pressing device according to claim 4, characterized in that: A lower connecting hole (31) is provided at the bottom center of the support rod (3), and the lower connecting hole (31) is a threaded hole. An external thread is provided on the outside of the push-pull rod (21) from the middle to the top, and the external thread constitutes a first threaded portion (211). The first threaded portion (211) is threadedly matched with the lower connecting hole (31); an external thread is provided on the outside of the push-pull rod (21) between the first threaded portion (211) and the micro ball bushing (7), and the external thread constitutes a second threaded portion (212). The second threaded portion (212) is provided with a second limiting nut (22) threadedly matched with it, and the second limiting nut (22) is in conflict with the top of the micro ball bushing (7).

6. The engine hood precision inspection and pressing device according to claim 5, characterized in that: The outer diameter of the thread of the second threaded portion (212) is greater than the outer diameter of the thread of the first threaded portion (211); the first threaded portion (211) is provided with a first limiting nut (5) that matches its thread, and the top of the first limiting nut (5) is in conflict with the bottom of the support rod (3).

7. The engine hood precision inspection and pressing device according to claim 1, characterized in that: An upper joint (32) is provided at the top of the support rod (3), and a plastic cap (4) made of plastic material is sleeved on the upper joint (32).

8. The engine hood precision inspection and pressing device according to claim 7, characterized in that: A sleeve hole (41) is provided in the bottom of the plastic cap (4); a limit head (33) is provided at the top center of the upper joint (32), and the limit head (33) is sleeve-fitted with the sleeve hole (41).

9. The engine hood precision inspection and pressing device according to claim 8, characterized in that: The limiting head (33) is in a T-shaped structure, and is composed of a limiting protrusion (331) and a connecting column (332) arranged at the bottom center of the limiting protrusion (331). The connecting column (332) and the limiting protrusion (331) are integrally formed. The outer side of the limiting protrusion (331) is in an arc-shaped structure. The outside of the connecting column (332) is provided with an external thread. The top center of the upper joint (32) is provided with an upper connecting hole (321). The upper connecting hole (321) is an internal threaded hole, which is threadedly matched with the connecting column (332).

10. The engine hood precision inspection and pressing device according to claim 1, characterized in that: The connecting arm (115) is in a crescent-shaped structure.

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