Mechanical jack

Abstract

The utility model provides a mechanical jack which comprises a supporting base, an adjusting screw rod, a rotary driving assembly, a lifting ejector rod and a supporting ejector block, the lower end of the adjusting screw rod is rotatably installed at the upper end of the supporting base, the lower end of the lifting ejector rod is in threaded connection with the upper end of the adjusting screw rod, and the rotary driving assembly is fixed in the middle of the adjusting screw rod. The mechanical jacking and supporting device has the advantages that the mechanical jacking and supporting device is suitable for jacking and supporting high objects, is achieved through a mechanical structure, and is simple in structure, low in manufacturing cost, small in occupied area, convenient to carry and transport and more flexible to use.

Description

Technical Field

[0001] The utility model relates to the field of jack structures, in particular to a mechanical jack. 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 a top support or bottom claw. Jacks are mainly used in factories, mines, transportation and other departments for vehicle repair and other lifting and supporting work. However, for lifting and supporting higher objects, the traditional jack cannot meet the use requirements in terms of stroke, and automatic lifting equipment is used to meet the use requirements. However, automatic lifting equipment is generally driven by electric or hydraulic cylinders, which has the disadvantages of complex structure, high production cost, large size, and inconvenient transportation. Therefore, it is necessary to produce a mechanical jack to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a mechanical jack to solve the problems mentioned in the background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A mechanical jack includes a supporting base, an adjusting screw, a rotating drive assembly, a lifting rod and a supporting top block. The lower end of the adjusting screw is rotatably mounted on the upper end of the supporting base, the lower end of the lifting rod is threadedly connected to the upper end of the adjusting screw, the rotating drive assembly is fixed to the middle part of the adjusting screw, and the supporting top block is fixed to the upper end of the lifting rod.

[0006] Further description of the utility model: The support base includes a support bottom plate and an arc-shaped connecting plate. The middle part of the arc-shaped connecting plate protrudes upward and is provided with a circular through hole. The lower end of the arc-shaped connecting plate is fixed on both sides to the support bottom plate. The adjusting screw passes through the circular through hole, and the lower end surface of the adjusting screw touches the top of the support bottom plate.

[0007] Further description of the utility model: The rotary drive assembly includes a rotating middle plate, a baffle, an articulated cylinder and a hand-held rotating rod. The rotating middle plate is horizontally arranged and fixed on the adjusting screw, the lower end of the baffle is fixed to the outer end of the rotating middle plate, the articulated cylinder is fixed to the lower end of the baffle, and one end of the hand-held rotating rod is rotatably mounted on the articulated cylinder.

[0008] Further description of the utility model: the baffle, the hinged tube and the hand-held rotating rod are each provided with two groups and correspond to the two ends of the rotating middle plate respectively.

[0009] Further description of the utility model: A threaded hole is provided at the lower end of the lifting push rod.

[0010] Further description of the utility model: the supporting top block includes a supporting top plate and a fixed sleeve, the supporting top plate is fixed to the upper end of the lifting top rod, the lower end of the fixed sleeve is fixed to the supporting top plate, and the fixed sleeve is provided with a sleeve cavity opening upward.

[0011] Further description of the utility model: the supporting top block also includes a limiting plate, which is fixed on the fixed sleeve and the upper end of the limiting plate protrudes from the fixed sleeve, and two groups of limiting plates are arranged and correspond to the two sides of the fixed sleeve respectively.

[0012] The beneficial effects of the utility model are as follows: when it is necessary to lift an object, the adjusting screw is first driven to rotate by the rotary drive assembly, thereby adjusting the overall length of the jack, adjusting the length to be slightly smaller than the distance between the object and the ground, and then placing the supporting base on the ground and corresponding to the bottom of the object, and continuing to rotate the rotary drive assembly to lift the lifting jack and the supporting top block upward, thereby achieving the lifting and supporting of the object. Compared with the traditional jack, the present design is suitable for the lifting and supporting of higher objects, and the present design is realized through a mechanical structure, with a simple structure and low manufacturing cost, and it occupies a small area, is easy to carry and transport, and is more flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall structure diagram of the utility model;

[0014] Figure 2 It is a structural diagram of the support base, the adjusting screw and the rotary drive assembly in the utility model;

[0015] Figure 3 It is a structural diagram of the support base in the utility model;

[0016] Figure 4 It is a structural diagram of the rotary drive assembly in the utility model;

[0017] Figure 5 It is a structural diagram of the lifting top rod and the supporting top block in the utility model;

[0018] Description of reference numerals:

[0019] 1. Support base; 11. Support bottom plate; 12. Arc connecting plate; 121. Circular through hole; 2. Adjusting screw; 3. Rotary drive assembly; 31. Rotating middle plate; 32. Baffle; 33. Articulated cylinder; 34. Hand-held rotating rod; 4. Lifting push rod; 41. Threaded hole; 5. Support top block; 51. Support top plate; 52. Fixed sleeve; 521. Sleeve cavity. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] like Figures 1 to 5As shown, a mechanical jack includes a supporting base 1, an adjusting screw 2, a rotating drive assembly 3, a lifting push rod 4 and a supporting top block 5. The lower end of the adjusting screw 2 is rotatably mounted on the upper end of the supporting base 1, the lower end of the lifting push rod 4 is threadedly connected to the upper end of the adjusting screw 2, the rotating drive assembly 3 is fixed to the middle part of the adjusting screw 2, and the supporting top block 5 is fixed to the upper end of the lifting push rod 4.

[0022] When it is necessary to lift the object, first drive the adjusting screw 2 to rotate through the rotary drive component 3, so as to adjust the overall length of the jack, and adjust the length to be slightly smaller than the distance between the object and the ground, then place the supporting base 1 on the ground and corresponding to the bottom of the object, continue to rotate the rotary drive component 3, so that the lifting jack 4 and the supporting top block 5 are lifted upward, thereby realizing the lifting and supporting of the object. Compared with the traditional jack, the present design is suitable for the lifting and supporting of higher objects, and the present design is realized through a mechanical structure, with a simple structure, low manufacturing cost, small footprint, easy handling and transportation, and more flexible use.

[0023] The support base 1 includes a support bottom plate 11 and an arc-shaped connecting plate 12. The middle part of the arc-shaped connecting plate 12 bulges upward and is provided with a circular through hole 121. The lower ends of the arc-shaped connecting plate 12 are fixed on the support bottom plate 11 at both sides. The adjusting screw 2 passes through the circular through hole 121, and the lower end surface of the adjusting screw 2 contacts the support bottom plate 11.

[0024] The support base 1 is made by fixing the arc-shaped connecting plate 12 on the support base plate 11. The structure is simple and light. Moreover, the working state of the end of the adjusting screw rod 2 can be easily observed through the space between the arc-shaped connecting plate 12 and the support base plate 11.

[0025] The rotating drive assembly 3 includes a rotating middle plate 31, a baffle 32, an articulated cylinder 33 and a hand-held rotating rod 34. The rotating middle plate 31 is horizontally arranged and fixed on the adjusting screw 2. The lower end of the baffle 32 is fixed to the outer end of the rotating middle plate 31. The articulated cylinder 33 is fixed to the lower end of the baffle 32. One end of the hand-held rotating rod 34 is rotatably mounted on the articulated cylinder 33.

[0026] When rotating the rotating drive assembly 3, the hand-held rotating rod 34 can be rotated to a horizontal position, and the rotating middle plate 31 can be driven to rotate by the hand-held rotating rod 34, thereby rotating the adjusting screw 2. The hand-held rotating rod 34 increases the length of the force arm, thereby achieving a labor-saving effect. To rotate the rotating middle plate 31 in a narrow space, the hand-held rotating rod 34 can also be placed vertically and in contact with the baffle 32, and the upper end of the hand-held rotating rod 34 is pulled to rotate the rotating middle plate 31.

[0027] The baffle plate 32, the hinged tube 33 and the hand-held rotating rod 34 are each provided in two groups and correspond to the two ends of the rotating middle plate 31 respectively, so as to facilitate two-handed operation, thereby further playing a labor-saving role.

[0028] A threaded hole 41 is provided at the lower end of the lifting jack 4. After the object is lifted to a suitable height, a screw is screwed into the lifting jack 4 through the threaded hole 41 and the adjusting screw 2 is pressed, thereby further fixing the adjusting screw 2 and the lifting jack 4 to prevent the jack from being displaced during the supporting process.

[0029] The supporting top block 5 includes a supporting top plate 51 and a fixing sleeve 52 . The supporting top plate 51 is fixed to the upper end of the lifting top rod 4 . The lower end of the fixing sleeve 52 is fixed to the supporting top plate 51 . The fixing sleeve 52 is provided with a sleeve cavity 521 which is open upward.

[0030] When there is a protruding structure at the lower end of the supported object, the fixed sleeve 52 can be sleeved on the protruding structure, and the protruding structure corresponds to the sleeve cavity 521, so that the support top block 5 and the object are not easily offset.

[0031] The supporting top block 5 further includes a limiting plate, which is fixed on the fixing sleeve 52 and has an upper end protruding from the fixing sleeve 52 . Two groups of limiting plates are provided and correspond to two sides of the fixing sleeve 52 respectively.

[0032] For an object with a smaller width, when supporting, the width direction of the object corresponds to between the two sets of limit plates, thereby reducing the displacement of the supporting top block 5 along the width direction of the object.

[0033] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mechanical jack, characterized in that: It includes a supporting base, an adjusting screw, a rotating drive assembly, a lifting push rod and a supporting top block. The lower end of the adjusting screw is rotatably mounted on the upper end of the supporting base. The lower end of the lifting push rod is threadedly connected to the upper end of the adjusting screw. The rotating drive assembly is fixed to the middle part of the adjusting screw. The supporting top block is fixed to the upper end of the lifting push rod.

2. A mechanical jack according to claim 1, characterized in that: The support base includes a support bottom plate and an arc-shaped connecting plate. The middle part of the arc-shaped connecting plate protrudes upward and is provided with a circular through hole. Both sides of the lower end of the arc-shaped connecting plate are fixed to the support bottom plate. The adjusting screw passes through the circular through hole, and the lower end surface of the adjusting screw contacts the support bottom plate.

3. A mechanical jack according to claim 1, characterized in that: The rotary drive assembly includes a rotating middle plate, a baffle, an articulated cylinder and a hand-held rotating rod. The rotating middle plate is horizontally arranged and fixed on the adjusting screw, the lower end of the baffle is fixed to the outer end of the rotating middle plate, the articulated cylinder is fixed to the lower end of the baffle, and one end of the hand-held rotating rod is rotatably mounted on the articulated cylinder.

4. A mechanical jack according to claim 3, characterized in that: The baffle plate, the hinged tube and the hand-held rotating rod are each provided in two groups and correspond to the two ends of the rotating middle plate respectively.

5. A mechanical jack according to claim 1, characterized in that: A threaded hole is provided at the lower end of the lifting push rod.

6. A mechanical jack according to claim 1, characterized in that: The supporting top block comprises a supporting top plate and a fixing sleeve, wherein the supporting top plate is fixed to the upper end of the lifting top rod, the lower end of the fixing sleeve is fixed to the supporting top plate, and the fixing sleeve is provided with a sleeve cavity which is open upward.

7. A mechanical jack according to claim 6, characterized in that: The supporting top block also includes a limiting plate, which is fixed on the fixing sleeve and has an upper end protruding from the fixing sleeve. The limiting plates are arranged in two groups and correspond to two sides of the fixing sleeve respectively.

Images