Vehicle-mounted scissor jack

Abstract

The utility model relates to a vehicle-mounted scissor jack. According to the technical scheme, the device comprises a bottom plate, lower supporting arms are hinged to the left side and the right side of the bottom plate respectively, upper supporting arms are hinged to the upper ends of the lower supporting arms respectively, lead screws and nuts are installed on two hinge shafts of the upper supporting arms and the lower supporting arms respectively, a top plate is hinged to the upper ends of the two upper supporting arms, and wedge-shaped bearing platforms are arranged on the left side and the right side of the top plate respectively. A top head is arranged above the top plate, a clamping groove is formed in the top head, the left side and the right side of the lower end of the top head are inclined faces matched with the wedge faces of the wedge-shaped bearing platforms, polished rods are fixed to the front end and the rear end of the bottom of the top head respectively, the polished rods are installed on the top plate in a sliding mode, and first springs capable of enabling the top head to reset upwards are arranged on the polished rods. The problem that a clamping groove in the top of the jack is inconvenient to correspond to a protrusion on a vehicle chassis is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of jacks, in particular to a vehicle-mounted scissor jack. Background Art

[0002] Scissor jacks, with their agility, convenience, and easy folding, have become the most commonly used vehicle-mounted lifting equipment. Currently, the most common improvements to scissor jacks are concentrated in the jack head. For example, patent application number 2023219649723, titled "Existing Technology for Jacks," addresses the issue of cross-versatility through improvements to the jack head. Another example is patent application number 201280004448X, titled "Rotating Load Plate for Jacks," which also addresses the issue of versatility through a rotatable load plate.

[0003] However, in real life, the target vehicles served by vehicle-mounted scissor jacks are single, but the people who use vehicle-mounted scissor jacks are diverse, and these people generally do not have the ability to operate vehicle-mounted scissor jacks skillfully. Therefore, how to improve the vehicle-mounted scissor jacks to make their operation simpler and more efficient is the primary technical problem to be solved at present.

[0004] Jacks are often used in emergency tire changes. During this process, you first need to remove the jack, partially expand the folded jack, and place it under the vehicle. Then, align the slot on the top of the jack head with the protrusion on the vehicle chassis. Then, partially expand the jack so that the head is in full contact with the chassis. Then, use the rocker to drive the jack to continue expanding and lifting the vehicle. During the second expansion process, you need to lie on the ground and repeatedly observe and locate the alignment of the slot on the head and the protrusion on the chassis. After the alignment, there is no actual contact between the chassis and the jack. If the jack is accidentally moved during the process of expanding the jack to contact the chassis, the slot and the protrusion will not align. For inexperienced drivers, this process may need to be repeated several times to complete. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a vehicle-mounted scissor jack, which effectively solves the problem of the inconvenient correspondence between the slot on the jack head and the protrusion on the vehicle chassis.

[0006] The technical solution to the problem includes a base plate, a lower support arm is hinged on each of the left and right sides of the base plate, an upper support arm is hinged on the upper end of each lower support arm, a lead screw and a nut are respectively installed on the two hinge shafts of the upper support arm and the lower support arm, and a top plate is hinged on the upper ends of the two upper support arms, a wedge-shaped support platform is provided on each of the left and right sides of the top plate, the wedge surfaces of the two wedge-shaped support platforms are opposite, a top head is provided above the top plate, a card slot is provided on the top head, the left and right sides of the lower end of the top head are inclined surfaces adapted to the wedge surfaces of the wedge-shaped support platforms, a light rod is fixed on each of the front and rear ends of the bottom of the top head, the light rod is slidably mounted on the top plate, and the light rod is provided with a first spring that can reset the top head upward.

[0007] Preferably, a sleeve is fixed on each of the front and rear sides of the top plate, the polished rod passes through the corresponding sleeve, a baffle is provided at the lower end of the polished rod, and the first spring is a tension spring, one end of the tension spring is fixed on the sleeve, and the other end is fixed on the baffle.

[0008] Preferably, a wedge block is slidably installed on the wedge-shaped support platform, which is horizontal and passes through the wedge surface of the wedge-shaped support platform. The wedge surface of the wedge block is parallel to the wedge surface of the wedge support platform. A limiting groove is provided on the inclined surface of the head. The outer end of the wedge block is fixed with a second spring that can reset the wedge block inward.

[0009] Preferably, the lead screw is rotatably mounted on the intersection shaft of one of the upper support arm and the lower support arm through a positioning sleeve, the nut is fixedly mounted on the intersection shaft of the other upper support arm and the lower support arm, and a circular ring is fixed on the end of the lead screw.

[0010] Preferably, the lower end of the top plate is hinged to the corresponding two upper arms via four legs.

[0011] Preferably, the upper support arm and the lower support arm are both U-shaped plate structures, and the upper support arm can be buckled into the lower support arm.

[0012] Preferably, the bottom plate is X-shaped.

[0013] The advantages of this utility model are:

[0014] 1. The traditional jack is improved into a double-layer structure and flexibly connected through the first spring. When the slot on the jack corresponds to the protrusion on the chassis, the contact positioning connection can be achieved in one step. In the subsequent expansion process, even if the jack shakes or moves, it will not cause the jack to separate from the chassis, realizing fool-proof positioning of the slot and the protrusion.

[0015] 2. Through the cooperation of the wedge block on the wedge-shaped base and the limit groove on the jack, the jack can automatically be fixed to the top plate after the jack contacts the wedge-shaped base. On the one hand, it is convenient to retrieve the jack from under the vehicle after completing the jacking operation. On the other hand, it can further reduce the occupied space when folding the jack, thereby meeting the space requirements of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the jack of the utility model.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the main view of the top plate and the top head of the utility model.

[0018] Figure 3 This is a three-dimensional structural schematic diagram of the top plate and the top head of the utility model in a top-down state.

[0019] In the figure: bottom plate-1, lower support arm-2, upper support arm-3, screw-4, nut-5, top plate-6,

[0020] Wedge-shaped platform-7, head-8, slot-9, polished rod-10, first spring-11, sleeve-12,

[0021] Baffle-13, wedge-14, limiting groove-15, second spring-16. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example

[0024] Depend on Figures 1 to 3As can be seen, the present invention includes a base plate 1, which is X-shaped. A lower arm 2 is hinged to each of the left and right sides of the base plate 1. An upper arm 3 is hinged to the upper end of each lower arm 2. Both the upper arm 3 and the lower arm 2 are U-shaped plate structures, and the upper arm 3 can be snapped into the lower arm 2. A lead screw 4 and a nut 5 are respectively mounted on the two hinge shafts of the upper and lower arms 3 and 2. The lead screw 4 is rotatably mounted on the intersection shaft of one of the upper and lower arms 3 and 2 via a positioning sleeve, and the nut 5 is fixedly mounted on the intersection shaft of the other upper and lower arms 3 and 2. A circular ring is fixed to the end of the lead screw 4. A top plate 6 is hinged to the upper ends of the two upper arms 3, and the lower end of the top plate 6 is hinged to the corresponding two upper arms 3 via four legs. A wedge-shaped support 7 is provided on each of the left and right sides of the top plate 6, with the wedge surfaces of the two wedge-shaped support 7 facing each other. A wedge block 14 is slidably mounted on the wedge-shaped support 7, extending horizontally through the wedge surface of the support 7. The wedge surface of the wedge block 14 is parallel to the wedge surface of the support 7. A retaining groove 15 is provided on the inclined surface of the plug 8. A second spring 16 is fixed to the outer end of the wedge block 14, which helps the wedge block 14 return inward. A plug 8 is located above the top plate 6. The plug 8 has a retaining groove 9. The left and right sides of the lower end of the plug 8 are inclined surfaces that align with the wedge surface of the wedge-shaped support 7. A polished rod 10 is fixed to each of the front and rear ends of the bottom of the plug 8. The polished rod 10 is slidably mounted on the top plate 6 and is equipped with a first spring 11 that helps the plug 8 return upward. A sleeve 12 is fixed to each of the front and rear ends of the top plate 6. The polished rod 10 passes through the corresponding sleeve 12. A stopper 13 is located at the lower end of the polished rod 10. The first spring 11 is a tension spring, one end of which is fixed to the sleeve 12 and the other end to the stopper 13.

[0025] The specific working process of the utility model is as follows: when the jack is in the folded state, the plug 8 is fixed to the wedge-shaped support 7 by the wedge block 14 and the positioning groove. When using the device, the jack is removed and the wedge block 14 is pulled outward. Under the reset action of the first spring 11, without the obstruction of the wedge block 14, the plug 8 is away from the top plate 6 and is in a flexible connection with it.

[0026] During use, the screw 4 is first rotated so that the distance between the bottom plate 1 and the jack head 8 is greater than the distance between the vehicle chassis and the ground, and the distance between the bottom plate 1 and the top plate 6 is less than the distance between the vehicle chassis and the ground. In this way, when placing the jack, the jack can be placed under the vehicle by pressing the jack head 8. After releasing the jack head 8, the jack head 8 can directly contact the vehicle chassis under the reset action of the first spring 11. In this process, there is no need to lie on the ground. The jack can be moved back and forth by feeling the protrusion on the chassis to achieve the positioning and engagement of the slot 9 on the jack head 8 with the protrusion on the chassis.

[0027] After completion, the auxiliary connecting rod rotates the lead screw 4 to jack up the vehicle. During this process, the ram 8 gradually approaches the top plate 6, and the first spring 11 is stretched. As the ram 8 approaches the top plate 6, it contacts the wedge surface of the wedge block 14 and moves it outward until the wedge block 14 aligns with the limit groove 15. Under the reset action of the second spring 16, the wedge block 14 rubs against the corresponding limit groove 15 to achieve a fixed connection between the top plate 6 and the ram 8. The jack continues to expand, and the lifting operation is completed.

[0028] After the jack is used, the screw 4 is rotated in the opposite direction. At this time, the head 8 and the top plate 6 are kept fixed under the action of the wedge block 14 and the limit groove 15. The jack can be directly taken out from under the vehicle after retraction. After taking it out, continue to rotate the screw 4 to reset it to the initial rotation and then put it away.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted scissor jack, comprising a base plate (1), a lower arm (2) hinged to the left and right sides of the base plate (1), an upper arm (3) hinged to the upper end of each lower arm (2), a lead screw (4) and a nut (5) respectively mounted on the two hinge shafts of the upper arm (3) and the lower arm (2), characterized in that: The upper ends of the two upper arms (3) are hinged with a top plate (6), and a wedge-shaped support (7) is provided on each of the left and right sides of the top plate (6). The wedge surfaces of the two wedge-shaped support (7) are opposite to each other. A top head (8) is provided above the top plate (6), and a slot (9) is provided on the top head (8). The left and right sides of the lower end of the top head (8) are inclined surfaces adapted to the wedge surfaces of the wedge-shaped support (7). A light rod (10) is fixed to each of the front and rear ends of the bottom of the top head (8). The light rod (10) is slidably mounted on the top plate (6). The light rod (10) is provided with a first spring (11) that can reset the top head (8) upward.

2. A vehicle-mounted scissor jack according to claim 1, characterized in that: A sleeve (12) is fixed to each of the front and rear sides of the top plate (6), and the light rod (10) passes through the corresponding sleeve (12). A baffle (13) is provided at the lower end of the light rod (10). The first spring (11) is a tension spring, one end of which is fixed to the sleeve (12), and the other end is fixed to the baffle (13).

3. The vehicle-mounted scissor jack according to claim 1, characterized in that: A wedge block (14) is slidably mounted on the wedge-shaped support platform (7) and is horizontal and penetrates the wedge surface of the wedge-shaped support platform (7). The wedge surface of the wedge block (14) is parallel to the wedge surface of the wedge-shaped support platform (7). A limiting groove (15) is provided on the inclined surface of the head (8). A second spring (16) is fixed to the outer end of the wedge block (14) to reset the wedge block (14) inward.

4. The vehicle-mounted scissor jack according to claim 1, characterized in that: The lead screw (4) is rotatably mounted on the intersection shaft of one of the upper support arms (3) and the lower support arm (2) via a positioning sleeve, and the nut (5) is fixedly mounted on the intersection shaft of the other upper support arm (3) and the lower support arm (2). A circular ring is fixed to the end of the lead screw (4).

5. The vehicle-mounted scissor jack according to claim 1, characterized in that: The lower end of the top plate (6) is hinged to the corresponding two upper arms (3) via four legs.

6. The vehicle-mounted scissor jack according to claim 1, characterized in that: The upper support arm (3) and the lower support arm (2) are both U-shaped plate structures, and the upper support arm (3) can be buckled into the lower support arm (2).

7. The vehicle-mounted scissor jack according to claim 1, characterized in that: The bottom plate (1) is X-shaped.

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