A safety device attached to a hydraulic jack

Abstract

The present invention relates to an auxiliary safety device for a hydraulic jack. The auxiliary safety device for the hydraulic jack includes: a top plate, the protruding end of the piston of the hydraulic jack can abut against the top plate and drive the top plate to move synchronously to lift an object located above the top plate; a support mechanism, arranged below the top plate and capable of abutting against the top plate, which includes two relatively arranged support members, the two support members can approach and move away from each other, and a plurality of tooth portions are formed on the inner sides of the support members and arranged in sequence in the vertical direction. When at least one tooth portion of each of the two support members cooperates with the housing located on the outer periphery of the piston in the hydraulic jack, the object located above the top plate can apply pressure to the housing through the top plate and the support mechanism; an adjustment mechanism for adjusting the distance between the two support members. Using the auxiliary safety device for the hydraulic jack in cooperation with the hydraulic jack to jointly lift heavy objects not only improves the use effect and safety, but also can extend the service life of the hydraulic jack.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting devices, and more particularly to a safety device attached to a hydraulic jack. Background Art

[0002] A general hydraulic jack consists of a base, a housing (shell), an oil cylinder, a piston, a oil pipe (oil circuit), and an electric (manual) hydraulic system. Different model specifications result in different external dimensions of the jack and different heights of piston jacking. However, due to the large pressure of the heavy object and the inertia of the hydraulic system, after the hydraulic jack jacks the heavy object to the required height, the piston may drop by a certain height, resulting in an unsatisfactory use effect. Moreover, when working under high pressure and heavy load for a long time, the high-frequency operation makes the hydraulic oil turbid and easily clogs the hydraulic system. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a safety device attached to a hydraulic jack that overcomes or at least partially solves the above problems.

[0004] The safety device attached to the hydraulic jack includes:

[0005] A top plate, the extended end of the piston of the hydraulic jack can abut against the top plate and drive the top plate to move synchronously to jack up an object located above the top plate;

[0006] A support mechanism, the support mechanism is arranged below the top plate and can abut against the top plate. It includes two relatively arranged support members, the two support members can approach and move away from each other, and a plurality of tooth portions are formed on the inner side of the support members and arranged in sequence in the vertical direction. When at least one tooth portion of each of the two support members cooperates with the housing located on the outer periphery of the piston in the hydraulic jack, the object located above the top plate can apply pressure to the housing through the top plate and the support mechanism;

[0007] An adjustment mechanism, the adjustment mechanism is used to adjust the distance between the two support members.

[0008] In one embodiment, a groove capable of accommodating the extended end of the piston is formed at the bottom of the top plate.

[0009] In one embodiment, the tooth portion of the support member can mesh with the external teeth formed by the housing located on the outer periphery of the piston in the hydraulic jack.

[0010] In one embodiment, the adjustment mechanism includes a turntable, two sliders, and two connecting rods. The two sliders are relatively arranged and cooperate with the guide grooves formed on the top plate. The support member is fixedly connected to the slider. When the turntable rotates relative to the top plate, the two sliders are driven to approach and move away from each other through the corresponding connecting rods.

[0011] In one embodiment, the turntable is disposed in a circular mounting groove formed by the concave upper surface of the top plate.

[0012] In one embodiment, the adjusting mechanism further includes a control rod, one end of which can pass through a through hole formed in the top plate and act on the turntable to drive the turntable to rotate relative to the top plate.

[0013] In one embodiment, the outer edge of the top plate extends upward to form an acting portion capable of abutting an object above the top plate.

[0014] By using the hydraulic jack auxiliary safety device of the present invention in cooperation with the hydraulic jack to jointly lift heavy objects, not only the use effect and safety are improved, but also the service life of the hydraulic jack can be extended. Description of the Drawings

[0015] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, and are used to illustrate the embodiments of the present application and, together with the written description, to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0016] Figure 1 is a schematic structural diagram of one embodiment of a hydraulic jack auxiliary safety device of the present invention;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the hydraulic jack auxiliary safety device from another perspective;

[0018] Figure 3 is Figure 2 an A-A cross-sectional view of the hydraulic jack auxiliary safety device;

[0019] Figure 4 is Figure 1 a schematic structural diagram of the top plate;

[0020] Figure 5 is Figure 4 a B-B cross-sectional view of the top plate;

[0021] Figure 6 is Figure 1 a schematic structural diagram of the support member;

[0022] Figure 7 is Figure 6 a C-C cross-sectional view of the support member;

[0023] Figure 8 is Figure 1Schematic structural diagram of the control lever.

[0024] Explanation of reference numerals in the drawings: 1, top plate; 2, support member; 3, tooth portion; 4, groove; 5, clamping portion; 6, turntable; 7, slider; 8, connecting rod; 9, guide groove; 10, circular mounting groove; 11, acting portion; 12, control lever; 13, through hole. Specific embodiments

[0025] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Those of ordinary skill in the art can make various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

[0026] In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., which are mentioned or may be mentioned, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "comprising", "including" and any variations thereof are intended to cover non-exclusive inclusion.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] A hydraulic jack accessory safety device according to an embodiment of the present invention will be described below with reference to the drawings.

[0029] See Figures 1 to 3 , a hydraulic jack accessory safety device according to an embodiment of the present invention includes a top plate 1, a support mechanism, and an adjustment mechanism.

[0030] The protruding end of the piston of the hydraulic jack can abut against the top plate 1 and drive the top plate 1 to move synchronously to lift the object located above the top plate 1. The support mechanism is arranged below the top plate 1 and can abut against the top plate 1. It includes two relatively arranged support members 2, and the two support members 2 can approach and move away from each other. A number of tooth portions 3 arranged in sequence in the vertical direction are formed on the inner sides of the support members 2. When at least one tooth portion 3 of each of the two support members 2 cooperates with the housing located on the outer periphery of the piston in the hydraulic jack, the object located above the top plate 1 can apply pressure to the housing through the top plate 1 and the support mechanism. The adjustment mechanism is used to adjust the distance between the two support members 2.

[0031] When using the auxiliary safety device of the hydraulic jack to cooperate with the hydraulic jack to lift heavy objects, the supporting hydraulic jack auxiliary safety device can be first placed on the hydraulic jack, and the top plate 1 is located below the heavy object to be lifted. The hydraulic jack starts to work, and the top plate 1 and the support mechanism rise synchronously with the protruding end of the piston. When the heavy object is lifted to the required height, the distance between the two support members 2 is reduced, that is, the two support members 2 are made to approach each other until at least one tooth portion 3 of each of the two support members 2 cooperates with the housing located on the outer periphery of the piston in the hydraulic jack. After that, the hydraulic system of the hydraulic jack stops working, and part of the gravity of the heavy object is transmitted to the housing of the hydraulic jack through the top plate 1 and the support member 2, and the other part of the gravity of the heavy object is transmitted to the piston through the top plate 1, that is, the heavy object is jointly lifted by the auxiliary safety device of the hydraulic jack and the hydraulic jack.

[0032] After the heavy object is lifted to the preset height, due to the cooperation of at least one tooth portion 3 of each of the two support members 2 with the housing located on the outer periphery of the piston in the hydraulic jack, the height of the heavy object is locked. Therefore, the hydraulic system of the hydraulic jack stops working and will not cause the heavy object to drop by more than the preset value, thus achieving an ideal use effect. At the same time, it also avoids the hydraulic jack working under high pressure and heavy load for a long time and reduces the occurrence of hydraulic system blockage.

[0033] When the hydraulic jack needs to be removed, the hydraulic system is pressurized to make the protruding end of the piston drive the top plate 1 and the support mechanism to rise synchronously by a set height, such as 5 - 10 mm. Then, the distance between the two support members 2 is increased, that is, the two support members 2 are made to move away from each other until the tooth portions 3 of the two support members 2 are separated from the housing located on the outer periphery of the piston in the hydraulic jack. Subsequently, the hydraulic system is depressurized and the piston returns to its original position, ending the entire heavy object lifting process.

[0034] Therefore, using the auxiliary safety device of the hydraulic jack to cooperate with the hydraulic jack to jointly lift heavy objects not only improves the use effect and safety, but also can extend the service life of the hydraulic jack.

[0035] Now refer to Figure 5, a groove 4 capable of accommodating the extended end of the piston is formed at the bottom of the top plate 1. The groove 4 can be adapted to the shape of the extended end of the piston. For example, if the cross-section of the extended end of the piston is circular, the cross-section of the groove 4 is also circular, and the inner diameter of the groove 4 is slightly larger than the outer diameter of the piston, so that the supporting hydraulic jack accessory safety device can be accurately placed on the hydraulic jack quickly.

[0036] In one embodiment, the outer side of the housing of the hydraulic jack located outside the piston is generally cylindrical, and a plurality of external teeth arranged in sequence in the vertical direction are formed on the outer side of the housing, and the pitch of each external tooth is the same. Correspondingly, referring to Figure 6 and Figure 7 , for the hydraulic jack accessory safety device adapted to the hydraulic jack, the inner wall of the clamping portion 5 of the support member 2 that cooperates with the housing is arc-shaped, and a plurality of tooth portions 3 arranged in sequence in the vertical direction are formed on the inner wall. The pitch of each tooth portion 3 is the same, and the pitch of the tooth portion 3 is the same as the pitch of the external tooth. When the two support members 2 can approach each other, the tooth portion 3 of the support member 2 can mesh with the external tooth formed by the housing of the hydraulic jack located outside the piston.

[0037] Now return Figures 1 to 3 , the adjusting mechanism includes a turntable 6, two sliders 7, and two connecting rods 8. The two sliders 7 are arranged oppositely and cooperate with the guide grooves 9 formed in the top plate 1. The support member 2 is fixedly connected to the slider 7, such as by bolt connection. When the turntable 6 rotates relative to the top plate 1, the two sliders 7 are driven to approach and move away from each other through the corresponding connecting rods 8, and then the two support members 2 are driven to approach and move away from each other. For example, when the turntable 6 rotates clockwise relative to the top plate 1 by a certain angle, the two sliders 7 move away from each other, and then the two support members 2 are driven to move away from each other; when the turntable 6 rotates counterclockwise relative to the top plate 1 by a certain angle, the two sliders 7 approach each other, and then the two support members 2 are driven to approach each other. Of course, the adjusting mechanism can also adopt other suitable structures, which will not be listed one by one here.

[0038] Preferably, the turntable 6 is arranged in a circular installation groove 10 formed by the inner concave of the upper surface of the top plate 1. The inner diameter of the circular installation groove 10 is slightly larger than the outer diameter of the turntable 6, which can make the rotation of the turntable 6 more stable.

[0039] Preferably, the outer edge of the top plate 1 extends upward to form an acting portion 11 that can abut against the object above the top plate 1. The setting of the acting portion 11 can prevent the heavy object from abutting on the turntable 6, the connecting rod 8, and the slider 7, and further prevent the heavy object from affecting the operation of the adjusting mechanism.

[0040] In one embodiment, the adjusting mechanism further includes a control rod 12. One end of the control rod 12 can pass through a through hole 13 formed in the top plate 1 and act on the turntable 6 to drive the turntable 6 to rotate relative to the top plate 1. Specifically, the turntable 6 is formed with a mounting hole. One end of the control rod 12 can pass through the through hole 13 formed in the top plate 1 and then be inserted into the mounting hole. Swinging the operating rod can cause the turntable 6 to rotate clockwise relative to the top plate 1 by a certain angle.

Claims

1. A safety device attached to a hydraulic jack, characterized in that, Comprising: A top plate, the protruding end of the piston of the hydraulic jack can abut against the top plate and drive the top plate to move synchronously to lift an object located above the top plate; A support mechanism, the support mechanism is arranged below the top plate and can abut against the top plate, and it includes two relatively arranged support members, the two support members can approach and move away from each other, and a number of tooth portions arranged in sequence in the vertical direction are formed on the inner side of the support members. When at least one tooth portion of each of the two support members cooperates with the housing located on the outer periphery of the piston in the hydraulic jack, the object located above the top plate can apply pressure to the housing through the top plate and the support mechanism; An adjustment mechanism, the adjustment mechanism is used to adjust the distance between the two support members; The adjustment mechanism includes a turntable, two sliders, and two connecting rods. The two sliders are relatively arranged and cooperate with the guide grooves formed in the top plate. The support members are fixedly connected to the sliders. When the turntable rotates relative to the top plate, the two sliders are driven to approach and move away from each other through the corresponding connecting rods.

2. The hydraulic jack accessory safety device according to claim 1, characterized in that: A groove capable of accommodating the protruding end of the piston is formed at the bottom of the top plate.

3. The hydraulic jack accessory safety device according to claim 1, characterized in that: The tooth portions of the support members can mesh with the external teeth formed by the housing located on the outer periphery of the piston in the hydraulic jack.

4. The hydraulic jack accessory safety device according to claim 1, characterized in that: The turntable is arranged in a circular installation groove formed by the inner concave of the upper surface of the top plate.

5. The hydraulic jack accessory safety device according to claim 4, characterized in that: The adjustment mechanism further includes a control rod, one end of the control rod can pass through the through hole formed in the top plate and act on the turntable to drive the turntable to rotate relative to the top plate.

6. The hydraulic jack accessory safety device according to claim 1, wherein: The outer edge of the top plate extends upward to form an acting portion capable of abutting against the object above the top plate.

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