Jack with heightening tray

Abstract

The utility model relates to the technical field of jacks, in particular to a jack with a heightening tray. The jack with the heightening tray comprises a jack top arm and a tray force arm, the jack top arm is installed at the output end of a hydraulic cylinder of the jack, and the tray force arm is fixedly installed on the jack top arm. A tray cavity is formed in the tray force arm and is in a trapezoid shape, and a heightening tray assembly is installed in the tray cavity. According to the jack with the heightening tray, the lift height position of a lifted object can be adjusted before the object is lifted and after the object is lifted.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a jack with a heightened tray. Background Art

[0002] A jack is a light and small lifting device that uses a rigid lifting piece as a working device to lift heavy objects within a small stroke of the top support or bottom claws. Jacks are generally used in factories, mines, transportation and other departments for vehicle repairs and other lifting and supporting work.

[0003] At present, the jack is mainly composed of side plates, lifting arms, top plate devices, oil pumps and handle operating devices, etc. Its lift is fixed, so it has certain limitations in lifting some models with a large chassis distance from the ground.

[0004] To this end, a related art provides a double-pallet jack with adjustable lift height, which consists of side plates, a lifting arm, a lifting plate device, and a handle operating device. The lifting plate device is composed of a U-shaped bracket weldment, bolts, and a pallet. The characteristic is that the pallet is one or more and is mounted on the U-shaped bracket weldment by bolts after being stacked. The lift height can be adjusted by adjusting the number of pallets to adapt to occasions with different lift height requirements.

[0005] When using this double-pallet jack with adjustable lift height, first install the U-shaped bracket weldment on the crane arm, and then fix the pallet to the U-shaped bracket weldment with bolts to ensure the reliability of the connection between the pallet and the bracket weldment. If one pallet cannot meet the specific lift requirement, just unscrew the bolts and install another pallet to meet the requirement.

[0006] The double-pallet jack with adjustable lift height has a simple method of adjusting the pallet height position. By increasing or decreasing the number of stacked pallets, the lift height position of the entire jack can be adjusted. However, the problem and defect are also obvious. The lift height position of the object after being lifted by the jack cannot be adjusted and corrected by tools. The lift height of the object can only be determined before lifting, which places high demands on the operator.

[0007] In view of the problems in the above background technology, the present invention aims to provide a jack with an elevated pallet. Utility Model Content

[0008] The purpose of the utility model is to provide a jack with an elevated pallet to solve the problems raised in the above background technology.

[0009] To achieve the above objectives, the present invention provides the following technical solutions:

[0010] A jack with a raised pallet, comprising:

[0011] A jack top arm and a pallet arm, wherein the jack top arm is mounted on the output end of the hydraulic cylinder of the jack, and the pallet arm is mounted and fixed on the jack top arm;

[0012] A pallet cavity is formed inside the pallet arm, and the pallet cavity is trapezoidal. A heightened pallet assembly is installed inside the pallet cavity; wherein, the heightened pallet assembly includes a positioning block, a pallet screw and a bolt, and the bolt is divided into a heightening bolt and a positioning bolt. The positioning block is installed and fixed inside the pallet cavity, and a pallet screw is provided at the upper end of the positioning block. The upper end of the pallet screw passes through the inner wall of the pallet arm, and a heightening bolt is installed and fixed on the outside of the pallet screw at a position in contact with the outer wall of the pallet arm, and a positioning bolt is movably installed on the outside of the part of the pallet screw located at the upper end of the heightening bolt.

[0013] As a further solution of the present invention: a locking rod is passed through the middle position of the positioning block inside the tray cavity, and a locking handle is connected to the end part after one end of the locking rod passes through the inner wall of the tray cavity, and the end part of the other end of the locking rod passes through the inner wall of the tray cavity and is fixed by a sealing cap.

[0014] As a further solution of the present invention: a rotating shaft is provided at the middle position of the bottom end of the pallet screw, and a stop block is provided at the end part after the lower end of the rotating shaft passes through the positioning block. At the same time, an empty groove is opened inside the bottom end of the positioning block, and the stop block set at the bottom end of the rotating shaft is limited inside the empty groove.

[0015] As a further solution of the present invention: a gasket is provided at the lower end of the positioning block, a protrusion is distributed at the bottom end of the gasket, a gasket is laid at the bottom end of the tray cavity, grooves are arranged on the surface of the gasket, and the protrusions distributed at the bottom end of the gasket are limitedly installed in the grooves opened on the surface of the gasket.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The jack with raised pallet has the following advantages:

[0018] The invention changes the original method of adjusting the lift height by stacking or reducing the number of pallets on the jack. Instead, the invention forms a pallet cavity inside the pallet lever arm. The pallet cavity is trapezoidal in shape, and a pallet raising assembly is installed inside the pallet cavity. The pallet raising assembly includes a positioning block, a pallet screw and a bolt. The positioning block is fixed inside the pallet cavity. The pallet screw is provided at the upper end of the positioning block. The upper end of the pallet screw passes through the inner wall of the pallet lever arm. A heightening bolt is fixed on the outer side of the pallet screw at the position in contact with the outer wall of the pallet lever arm. A positioning bolt is movably installed on the outer side of the part of the pallet screw located at the upper end of the heightening bolt.

[0019] When the lifting tray assembly itself needs to be raised or lowered to further elevate the object being lifted, the operator can use the tool force and the raising bolt position to push the tray screw to rotate. When the tray screw rotates, the tray screw can be raised or lowered inside the screw hole passing through the object, thereby adjusting the height of the lifted object.

[0020] In this way, the lift height position of the lifted object can be adjusted before and after the object is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention.

[0022] Figure 1 This is a structural schematic diagram of a jack with a raised pallet according to an embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the installation between a pad and a pad with a raised pallet jack according to an embodiment of the present invention.

[0024] In the figure: 1-pallet screw, 2-positioning bolt, 3-heightening bolt, 4-pallet force arm, 5-pallet cavity, 6-positioning block, 7-rotating shaft, 8-locking handle, 9-locking rod, 10-sealing cap, 11-stopper, 12-empty slot, 13-gasket, 14-gasket, 15-bump, 16-jack top arm, 17-groove. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Example

[0027] See also Figure 1 and Figure 2 The utility model provides a jack with a raised pallet in an embodiment, and the jack with a raised pallet includes:

[0028] The jack top arm 16 and the pallet arm 4, the jack top arm 16 is installed on the output end of the hydraulic cylinder of the jack, and the pallet arm 4 is installed and fixed on the jack top arm 16;

[0029] A pallet cavity 5 is formed inside the pallet arm 4. The pallet cavity 5 is trapezoidal in shape. A pallet heightening assembly is installed inside the pallet cavity 5. The pallet heightening assembly includes a positioning block 6, a pallet screw 1, and a bolt. The bolt is divided into a heightening bolt 3 and a positioning bolt 2. The positioning block 6 is fixed inside the pallet cavity 5. The upper end of the positioning block 6 is provided with a pallet screw 1. The upper end of the pallet screw 1 passes through the inner wall of the pallet arm 4. The pallet screw 1 is fixed on the outside of the position where it contacts the outer wall of the pallet arm 4. The pallet screw 1 is movably installed with a positioning bolt 2 on the outside of the portion located at the upper end of the heightening bolt 3.

[0030] In the embodiment of the present invention, for example, when an object is lifted by a jack, the jack is started, and the kinetic energy output by the hydraulic cylinder of the jack pushes the jack top arm 16 to lift, thereby causing the pallet lever arm 4 located at the upper end of the jack top arm 16 to lift at the same time;

[0031] When the pallet arm 4 is lifted, the heightened pallet assembly installed inside the pallet cavity 5 is lifted, thereby lifting the object on the upper end of the pallet screw 1;

[0032] When it is necessary to lift the height-raising tray assembly itself to further lift the lifted object, the operator can use the tool force to act on the position of the height-raising bolt 3 to push the tray screw 1 to rotate. When the tray screw 1 rotates, the tray screw 1 can be lifted up and down inside the screw hole passing through the object, thereby adjusting the vertical height of the lifted object; at the same time, a supporting block with a nut can be matched at the top of the tray screw 1, so that when the tray screw 1 rotates, the nut of the supporting block can be driven to lift up and down along the tray screw 1, thereby adjusting the vertical height position of the lifted object;

[0033] After the height of the object is adjusted to a suitable position, the positioning bolt 2 is pushed to rise along the outer surface of the tray screw 1 by applying force to the positioning bolt 2, so that the positioning bolt 2 is moved to the lower end of the object and the lower end of the nut of the support block, thereby achieving support and positioning the object or the nut of the support block after the height position is adjusted to a suitable position;

[0034] See also Figure 1 In one embodiment of the present invention, a locking rod 9 is passed through the middle of the positioning block 6 located inside the tray cavity 5. A locking handle 8 is connected to the end portion of the locking rod 9 after one end passes through the inner wall of the tray cavity 5. The end portion of the other end of the locking rod 9 after passing through the inner wall of the tray cavity 5 is positioned by a sealing cap 10.

[0035] By passing the locking rod 9 inside the positioning block 6, the positioning block 6 can be rotated inside the pallet cavity 5 without being driven by the friction force generated by the extrusion when the pallet screw 1 rotates;

[0036] In one embodiment of the present invention, a rotating shaft 7 is provided at the middle position of the bottom end of the pallet screw 1. A stopper 11 is provided at the end portion of the rotating shaft 7 after the lower end passes through the positioning block 6. At the same time, an empty groove 12 is opened inside the bottom end of the positioning block 6. The stopper 11 provided at the bottom end of the rotating shaft 7 is limited inside the empty groove 12.

[0037] In the embodiment of the present invention, when the pallet screw 1 rotates, the rotating shaft 7 connected to the bottom end of the pallet screw 1 will also rotate inside the positioning block 6, thereby ensuring that the pallet screw 1 will not be offset due to positioning and limiting when it rotates; and by installing a stopper 11 at the bottom end of the rotating shaft 7 to limit it inside the empty groove 12, it can be ensured that the rotating shaft 7 will not be separated from the positioning block 6 when the pallet screw 1 rotates, thereby causing the entire pallet screw 1 to be separated from the inside of the pallet arm 4;

[0038] See also Figure 1 and Figure 2 In one embodiment of the present invention, a gasket 13 is provided at the lower end of the positioning block 6, and a protrusion 15 is distributed at the bottom end of the gasket 13. A gasket 14 is laid at the bottom end of the tray cavity 5. Grooves 17 are arranged on the surface of the gasket 14. The protrusions 15 distributed at the bottom end of the gasket 13 are limitedly installed in the grooves 17 on the surface of the gasket 14.

[0039] In the embodiment of the present invention, by arranging a gasket 13 at the bottom end of the positioning block 6, and by allowing the protrusions 15 distributed at the bottom end of the gasket 13 to be limitedly installed in the grooves 17 provided on the surface of the gasket 14, firstly, the function of the locking rod 9 can be the same as that of preventing the positioning block 6 from rotating inside the tray cavity 5, and secondly, damping and shock absorption can be achieved between the positioning block 6 and the bottom end of the tray cavity 5, thereby reducing the degree of pressure and tightness on the inner wall of the tray cavity 5 caused by the positioning block 6 lifting the items through the upper end of the pallet screw 1;

[0040] In the description of this utility model, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A jack with a raised pallet, comprising: A jack top arm (16) and a pallet arm (4), wherein the jack top arm (16) is mounted on the output end of the hydraulic cylinder of the jack, and the pallet arm (4) is mounted and fixed on the jack top arm (16); characterized in that: A tray cavity (5) is formed inside the tray arm (4), and the tray cavity (5) is in a trapezoidal shape. A heightened tray assembly is installed inside the tray cavity (5); wherein the heightened tray assembly includes a positioning block (6), a tray screw rod (1), and bolts, and the bolts are divided into heightened bolts (3) and positioning bolts (2); The positioning block (6) is fixed inside the pallet cavity (5), and a pallet screw (1) is provided at the upper end of the positioning block (6). The upper end of the pallet screw (1) passes through the inner wall of the pallet force arm (4). A heightening bolt (3) is fixedly installed on the outer side of the pallet screw (1) at a position where the pallet screw (1) contacts the outer wall of the pallet force arm (4). A positioning bolt (2) is movably installed on the outer side of the portion of the pallet screw (1) located at the upper end of the heightening bolt (3).

2. The jack with elevated pallet according to claim 1, characterized in that: A locking rod (9) is passed through the middle position of the positioning block (6) located inside the tray cavity (5); a locking handle (8) is connected and installed at the end portion of the locking rod (9) after one end passes through the inner wall of the tray cavity (5); and a sealing cap (10) is used to fix the end portion of the locking rod (9) after the other end passes through the inner wall of the tray cavity (5).

3. The jack with elevated pallet according to claim 1, characterized in that: A rotating shaft (7) is provided at the middle position of the bottom end of the pallet screw (1); a stopper (11) is provided at the end portion of the rotating shaft (7) after the lower end passes through the positioning block (6); and a slot (12) is provided inside the bottom end of the positioning block (6); the stopper (11) provided at the bottom end of the rotating shaft (7) is limited inside the slot (12).

4. The jack with elevated pallet according to claim 3, characterized in that: The lower end of the positioning block (6) is provided with a gasket (13), and a protrusion (15) is distributed at the bottom end of the gasket (13). The bottom end of the interior of the tray cavity (5) is paved with a gasket (14), and the surface of the gasket (14) is provided with grooves (17). The protrusion (15) distributed at the bottom end of the gasket (13) is limitedly installed in the groove (17) provided on the surface of the gasket (14).

Images