Jack with rotatable jacking head structure

Abstract

The utility model discloses a jack with a rotatable plug structure, and belongs to the technical field of jacks. Comprising an ejector head part, a supporting arm part, a base and a lead screw, the upper end and the lower end of the supporting arm part are hinged to the ejector head part and the base respectively, the supporting arm part is of a movable parallelogram structure, the lead screw is installed in the supporting arm part, and rotation of the lead screw is used for driving the supporting arm part to move. The device is characterized in that the ejector head component comprises a rotary ejector head, a pin and a supporting plate, the supporting plate is hinged to the upper end of the supporting arm component, and the rotary ejector head is hinged to the supporting plate through the pin. The automobile jack has the advantages that lateral tension applied to the jack by an automobile is relieved through autorotation of the rotary jacking head, the problem of distortion of the jack in the prior art is solved, the thickness of selected materials is reduced, the manufacturing cost is reduced, and the competitiveness is improved.

Description

Technical Field

[0001] This utility model belongs to the field of jack technology, specifically relating to a jack with a rotatable jack head structure. Background Technology

[0002] When lifting a car with a scissor jack, one wheel of the car is off the ground while the other three wheels remain in contact with the ground. At this time, the jack experiences a downward force F1 from the car and a lateral pulling force F2 from the car. Figure 1 As shown, the jack is always in a torsional state, which places high demands on the strength design of the jack. Therefore, when designing a jack, in order to achieve sufficient support strength, the thickness of the plates used to make the support arm component 2 and the base 3 is usually selected to be 3.0 to 3.5 mm, and the diameter of the lead screw 4 is selected to be 14 mm. The material procurement cost is high and the cost performance is not ideal.

[0003] In view of the aforementioned existing technology, it is necessary to make reasonable improvements to the structure of the existing jacks. To this end, the applicant has made beneficial designs, and the technical solution to be introduced below is a product of this background. Utility Model Content

[0004] The objective of this invention is to provide a jack with a rotatable jack head structure, which alleviates the lateral pulling force applied to the jack by the car through the rotation of the jack head, solves the torsion state that occurs in existing jacks, and at the same time reduces the thickness of the material, lowers the manufacturing cost, and improves competitiveness.

[0005] The present invention accomplishes its objective as follows: a jack with a rotatable jack head structure includes a jack head component, a support arm component, a base, and a lead screw. The upper and lower ends of the support arm component are respectively hinged to the jack head component and the base. The support arm component is a movable parallelogram structure. The lead screw is installed in the support arm component, and its rotation drives the movement of the support arm component, thereby adjusting the relative position of the jack head component and the base. The jack head component includes a rotating jack head, a pin, and a support plate. The support plate is hinged to the upper end of the support arm component, and the rotating jack head is hinged to the support plate by a pin.

[0006] In one specific embodiment of this utility model, the support plate has two support side plates arranged face to face and parallel to each other, and the two support side plates are connected by a connector.

[0007] In another specific embodiment of this utility model, the support plate is an H-shaped component when viewed from the side.

[0008] In another specific embodiment of this utility model, the space between the two support side plates located below the connector forms a support arm mounting cavity. The lower part of the support side plate is provided with a support arm connecting hole that is hinged to the upper end of the support arm component. The support arm component is inserted into the support arm mounting cavity, and a pin is used to pass through the support arm connecting hole and the hole on the support arm component to realize the hinged connection between the support arm component and the support plate.

[0009] In another specific embodiment of this utility model, the upper part of the supporting side plate is provided with a pin mounting hole, the rotating head is a cylindrical structure, the rotating head has a rotating hole in the direction of the central axis of the cylindrical structure, and the rotating head has a side plate clearance groove for inserting two supporting side plates. When the upper parts of the two supporting side plates are respectively inserted into the side plate clearance grooves, the rotating hole and the pin mounting hole are aligned and the pin is inserted, thereby forming a rotatable head component that contacts the vehicle.

[0010] In another specific embodiment of this utility model, the center of the cylindrical side of the rotating head has a protruding circumferential boss, and the cylindrical side of the rear side plate clearance groove of the rotating head is provided with a grinding array groove.

[0011] This utility model, due to the aforementioned structure, has the following beneficial effects: the rotating head of this jack can rotate, and when the jack lifts a car, the lateral pulling force F exerted on the jack by the car is relieved as the rotating head rotates, solving the problem of the jack being in a twisted state in the prior art, allowing the jack to fully withstand the downward pressure F1 from the car. Therefore, when designing the jack, engineers can use a plate thickness of 2.5–3.0 mm for the support arm and base, and a lead screw diameter of 12 mm, when lifting the same load car. Compared to the prior art, this reduces material thickness, lowers manufacturing costs, and significantly improves market competitiveness. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the force distribution on a jack as described in the prior art;

[0013] Figure 2 This is a perspective view of the jack described in this utility model;

[0014] Figure 3 This is a perspective view of the jack head component of the present invention;

[0015] Figure 4 This is an exploded schematic diagram of the jack head component of the present invention;

[0016] Figure 5 This is a schematic diagram of the force applied to the jack described in this utility model.

[0017] In the diagram: 1. Top head assembly, 11. Rotating top head, 111. Rotating hole, 112. Side plate clearance groove, 113. Circumferential boss, 114. Grinding array groove, 12. Pin, 13. Support plate, 131. Support side plate, 1311. Pin mounting hole, 1312. Support arm connecting hole, 132. Connector, 14. Support arm mounting cavity; 2. Support arm assembly, 21. Upper support arm, 22. Lower support arm; 3. Base; 4. Lead screw. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the applicant's description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes based on the concept of this utility model should be considered within the scope of protection of this utility model.

[0019] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on the positions shown in the corresponding figures. They are merely for the purpose of describing the technical solution provided by this utility model in conjunction with the figures and simplifying the description. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Please see Figure 2 This utility model relates to a jack with a rotatable jack head structure, comprising a jack head component 1, a support arm component 2, a base 3, and a lead screw 4. The upper and lower ends of the support arm component 2 are hinged to the jack head component 1 and the base 3, respectively. The support arm component 2 includes a pair of upper support arms 21 and a pair of lower support arms 22, which form a movable parallelogram structure. The lead screw 4 is installed in the parallelogram-shaped support arm component 2. Rotating the lead screw 4 drives the support arm component 2 to move, thereby adjusting the relative position of the jack head component 1 and the base 3.

[0021] like Figure 3 , Figure 4 As shown, the top component 1 includes a rotating top 11, a pin 12, and a support plate 13. The support plate 13 is hinged to a pair of upper support arms 21, and the rotating top 11 is hinged to the support plate 13 via the pin 12. The support plate 13 is made of steel. Specifically, the support plate 13 has two parallel support side plates 131 facing each other, connected by a connector 132, making the support plate 13 an H-shaped component when viewed from the side. The space between the two support side plates 131, located below the connector 132, forms a support arm mounting cavity 14.

[0022] like Figures 2 to 4As shown, the upper part of the support side plate 131 has a pin mounting hole 1311, and the lower part of the support side plate 131 has two arm connecting holes 1312, which are respectively hinged to a pair of upper support arms 21. The pair of upper support arms 21 are inserted into the arm mounting cavity 14, and the upper support arms 21 and the support plate 13 are hinged by passing a pin through the arm connecting hole 1312 and the hole on the upper support arm 21.

[0023] like Figure 3 , Figure 4 As shown, the rotating mandrel 11 is a cylindrical structure made of plastic, such as POM plastic. A rotating hole 111 is formed along the central axis of the cylinder. The rotating mandrel 11 has side plate recesses 112 for inserting two supporting side plates 131. When the upper parts of the two supporting side plates 131 are inserted into the side plate recesses 112 respectively, the rotating hole 111 and the pin mounting hole 1311 are aligned, and the pin 12 is inserted, thus forming a rotatable mandrel component 1 that contacts the vehicle. The rotating mandrel 11 has a protruding circumferential boss 113 in the middle of its cylindrical side surface. The cylindrical side surface of the rotating mandrel 11 facing away from the side plate recesses 112 is provided with a friction-enhancing array groove 114. The friction-enhancing array groove 114 is composed of multiple rows and columns of grooves, used to increase the friction between the rotating mandrel 11 and the lifted vehicle, preventing slippage during lifting.

[0024] Please continue reading Figure 5 and combined Figure 2 The working principle of the jack described in this utility model is as follows: rotating the lead screw 4 causes the jack head 1 to rise, thereby lifting the car. During the lifting process, the jack head 1 bears the downward pressure F1 and the lateral tension F2 of the car. Since the jack head 11 can rotate, the lateral tension F2 will be relieved as the jack head 11 rotates, and the jack can bear more of the downward pressure F1 of the car.

Claims

1. A jack with a rotatable jack head structure, comprising a jack head component (1), a support arm component (2), a base (3), and a lead screw (4), wherein the upper and lower ends of the support arm component (2) are respectively hinged to the jack head component (1) and the base (3), the support arm component (2) is a movable parallelogram structure, and the lead screw (4) is installed in the support arm component (2). The rotation of the lead screw (4) is used to drive the support arm component (2) to move, thereby adjusting the relative position of the jack head component (1) and the base (3), characterized in that: The top part (1) includes a rotating top part (11), a pin (12), and a support plate (13). The support plate (13) is hinged to the upper end of the support arm part (2). The rotating top part (11) is hinged to the support plate (13) by the pin (12).

2. A jack with a rotatable jack head structure according to claim 1, characterized in that: The support plate (13) has two support side plates (131) arranged face to face and parallel to each other, and the two support side plates (131) are connected by a connector (132).

3. A jack with a rotatable jack head structure according to claim 2, characterized in that: The support plate (13) is an H-shaped component when viewed from the side.

4. A jack with a rotatable jack head structure according to claim 2, characterized in that: The space between the two support side plates (131) located below the connector (132) forms a support arm mounting cavity (14). The lower part of the support side plate (131) is provided with a support arm connection hole (1312) that is hinged to the upper end of the support arm component (2). The support arm component (2) is inserted into the support arm mounting cavity (14). A pin is used to pass through the support arm connection hole (1312) and the hole on the support arm component (2) to realize the hinged connection between the support arm component (2) and the support plate (13).

5. A jack with a rotatable jack head structure according to claim 2, characterized in that: The upper part of the support side plate (131) is provided with a pin mounting hole (1311). The rotating head (11) is a cylindrical structure. A rotating hole (111) is provided in the direction of the central axis of the cylindrical structure of the rotating head (11). The rotating head (11) is provided with a side plate clearance groove (112) for the two support side plates (131) to be inserted. When the upper parts of the two support side plates (131) are respectively inserted into the two side plate clearance grooves (112), the rotating hole (111) and the pin mounting hole (1311) are aligned and the pin (12) is inserted, thereby forming a rotatable head component (1) that is in contact with the vehicle.

6. A jack with a rotatable jack head structure according to claim 5, characterized in that: The rotating head (11) has a protruding circumferential boss (113) in the middle of the cylindrical side surface, and the rotating head (11) has a grinding array groove (114) on the cylindrical side surface of the back side plate relief groove (112).

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