Telescopic jack

Abstract

The utility model discloses a telescopic jack which comprises a telescopic hydraulic cylinder, a supporting bottom plate is arranged at the bottom of the telescopic hydraulic cylinder, a supporting frame is welded to the side edge of the supporting bottom plate, a hinge connecting mechanism is arranged at the top of a telescopic rod in the telescopic hydraulic cylinder, and the hinge connecting mechanism comprises a first base arranged at the top of the telescopic hydraulic cylinder. A second base is hinged to the upper portion of the first base, a supporting top plate is hinged to the upper portion of the second base, first limiting rods are fixed to the two sides of the surface of the bottom of the first base through hinges, a plurality of notches are formed in the first base, and second limiting rods are arranged on the outer walls of the two sides of the second base. By arranging the hinge connecting mechanism, the angle of the supporting top plate can be adjusted, the flexible universality of the jack is improved, the distance between the limiting plates on the supporting top plate can be adjusted by arranging the adjusting grooves, the jack can limit and fix objects of different sizes, and the jacking stability is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, specifically to a telescopic jack. Background Technology

[0002] Telescopic jacks, with their compact size, convenient operation, and large lifting capacity, are widely used in mechanical maintenance, bridge construction, and logistics loading and unloading. In practical applications, the complexity of the working environment places higher demands on the applicability of these jacks.

[0003] When the contact surface of the object being lifted by a jack is inclined (such as the chassis of certain special vehicles or tilted equipment), the rigid, horizontally placed support plate of the existing jack cannot form an effective, large-area contact with the inclined surface. This results in a small contact area, concentrated pressure, and a tendency for slippage, damage to the object's surface, and even jack instability and tipping over, posing a significant safety hazard. Operators often need to find additional shims to level the surface, which is time-consuming, laborious, and difficult to guarantee stability. Furthermore, the support plate of existing jacks is usually a simple flat plate, lacking lateral restraint for the lifted object. During lifting, especially on uneven ground or under lateral forces, the lifted object is prone to lateral sliding or displacement on the support plate, which also poses a safety hazard. Therefore, there is an urgent need to design a telescopic jack to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a telescopic jack to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A telescopic jack includes a telescopic hydraulic cylinder. A support base plate is provided at the bottom of the telescopic hydraulic cylinder, and a support frame is welded to the side of the support base plate. A hinge connection mechanism is provided at the top of the telescopic rod inside the telescopic hydraulic cylinder. The hinge connection mechanism includes a first base located at the top of the telescopic rod inside the telescopic hydraulic cylinder, a second base hinged above the first base, and a support top plate hinged above the second base. Limiting rods are fixed to both sides of the bottom surface of the first base via hinges. Several slots are provided on the first base, and the limiting rods swing within the slots. Limiting rods are provided on both outer walls of the second base.

[0007] In a preferred embodiment of this utility model, the supporting top plate is provided with a plurality of adjustment grooves, and fixing bolts are inserted into the adjustment grooves. The top surface of the supporting top plate is provided with a plurality of limiting plates, and the limiting plates are fixed to the supporting top plate by fixing bolts.

[0008] In a preferred embodiment of this utility model, a foot pedal pressure plate is provided on the upper surface of the support base plate, a foot pedal pressure relief plate is provided on one side of the foot pedal pressure plate, and the oil circuits in the foot pedal pressure plate and the foot pedal pressure plate are connected to the telescopic hydraulic cylinder.

[0009] In a preferred embodiment of this utility model, one end of the support frame is provided with a caster wheel, the support frame is an I-shaped steel structure, and the caster wheel is equipped with a braking structure.

[0010] In a preferred embodiment of this utility model, a connector is provided on one outer wall of the telescopic hydraulic cylinder, and a handle is provided on the connector, the handle being rotatably connected to the connector.

[0011] In a preferred embodiment of this utility model, a damping device is provided at the hinge connection of the hinge connection mechanism. The damping device is used to limit the rotation angle of the hinge connection mechanism and prevent excessive rotation.

[0012] In a preferred embodiment of this utility model, both the foot pedal pressure plate and the foot pedal pressure relief plate are provided with anti-slip textures, which are distributed in an interlaced grid pattern.

[0013] In the above technical solution, the telescopic jack provided by this utility model has the following beneficial effects:

[0014] (1) By setting a hinge connection mechanism, the angle of the supporting top plate can be adjusted, improving the flexibility and versatility of the jack. At the same time, limit rod one and limit rod two are set to limit and fix the supporting top plate at different angles.

[0015] (2) By setting an adjustment groove, the distance between the limiting plates on the support top plate can be adjusted, so that the jack can limit and fix objects of different sizes, ensuring the stability during lifting.

[0016] (3) By setting the handle and casters, the jack can be moved to the working position conveniently and quickly, which improves its flexibility and equipment utilization. At the same time, the casters are equipped with a brake structure to ensure its stability during operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a top-view perspective view of the jack structure provided for an embodiment of the telescopic jack of this utility model.

[0019] Figure 2 This is a bottom-view perspective view of the jack structure provided for an embodiment of the telescopic jack of this utility model.

[0020] Figure 3 A perspective view of the hinge connection mechanism provided in an embodiment of the telescopic jack of this utility model.

[0021] Figure 4 A perspective view of the supporting top plate structure provided for an embodiment of the telescopic jack of this utility model.

[0022] 1. Telescopic hydraulic cylinder; 11. Connecting parts; 2. Support base plate; 21. Foot pedal pressure plate; 22. Foot pedal pressure relief plate; 3. Support frame; 31. Casters; 4. Hinge connection mechanism; 41. First base; 42. Second base; 43. Limiting rod one; 44. Groove; 45. Limiting rod two; 5. Support top plate; 51. Adjustment groove; 52. Limiting plate; 53. Fixing bolt; 6. Handle. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, the telescopic jack provided in this embodiment of the utility model includes a telescopic hydraulic cylinder 1, a support base plate 2 at the bottom of the telescopic hydraulic cylinder 1, a support frame 3 welded to the side of the support base plate 2, a hinge connection mechanism 4 at the top of the telescopic rod inside the telescopic hydraulic cylinder 1, the hinge connection mechanism 4 including a first base 41 at the top of the telescopic rod inside the telescopic hydraulic cylinder 1, a second base 42 hinged above the first base 41, a support top plate 5 hinged above the second base 42, a limit rod 43 fixed on both sides of the bottom surface of the first base 41 by hinges, a plurality of slots 44 opened on the first base 41, the limit rod 43 swinging in the slots 44, and limit rods 45 provided on both outer walls of the second base 42.

[0025] In this embodiment, a hinge connection mechanism 4 is provided at the top of the telescopic rod inside the telescopic hydraulic cylinder 1. The hinge connection mechanism 4 adopts a double-base linkage design. The hinge connection mechanism 4 includes a first base 41 located at the top of the telescopic rod inside the telescopic hydraulic cylinder 1. The first base 41 is forged from No. 45 steel. A second base 42 is hinged above the first base 41. The second base 42 is made of ductile iron and has good toughness and wear resistance. Limiting rod 43 is fixed on both sides of the bottom surface of the first base 41 by hinges. The limiting rod 43 is made of alloy steel. Several slots 44 are opened on the first base 41. The slots 44 adopt a U-shaped design to provide movement space for the limiting rod 43 to swing. The limiting rod 43 swings in the slots 44. Limiting rod 45 is provided on both outer walls of the second base 42. The limiting rod 45 can abut against the supporting top plate 5 to prevent it from tilting.

[0026] In this embodiment, a support top plate 5 is hinged above the second base 42. The support top plate 5 is made of 16Mn low-alloy high-strength steel, and its surface is shot-peened to enhance friction. Several adjustment grooves 51 are provided on the support top plate 5. The adjustment grooves 51 are oblong through grooves, and fixing bolts 53 are inserted into the adjustment grooves 51. Several limiting plates 52 are provided on the top surface of the support top plate 5. The limiting plates 52 are made of Q235B steel plate bent into shape, with a 3mm thick nitrile rubber pad bonded to the inside. The surface is designed with diagonal anti-slip texture. The limiting plates 52 are fixed to the support top plate 5 by fixing bolts 53, which can effectively prevent the lifted object from sliding. The design of the adjustment grooves 51 allows the limiting plates 52 to be freely adjusted within a certain range to adapt to the support requirements of workpieces of different sizes.

[0027] In this embodiment, a support base plate 2 is provided at the bottom of the telescopic hydraulic cylinder 1. The support base plate 2 is welded from thick Q235B steel plate. The cylinder body of the telescopic hydraulic cylinder 1 is made of 27SiMn seamless steel pipe. A foot pedal pressure plate 21 is provided on the upper surface of the support base plate 2. A foot pedal pressure relief plate 22 is provided on one side of the foot pedal pressure plate 21. The foot pedal pressure plate 21 and the foot pedal pressure relief plate 22 are made of aluminum alloy die casting. The oil circuit inside the foot pedal pressure plate 21 is connected to the telescopic hydraulic cylinder 1. The pressure plate integrates a one-way valve and a plunger pump structure. When it is necessary to descend, it is only necessary to step on the foot pedal pressure relief plate 22 to release pressure and descend.

[0028] In this embodiment, a support frame 3 is welded to the side of the support base plate 2. One end of the support frame 3 is equipped with a caster wheel 31. The caster wheel 31 is an 8-inch polyurethane-coated wheel with a load-bearing capacity of 2 tons. It is equipped with double-row tapered roller bearings and a double brake system. The support frame 3 is an I-shaped steel structure, and the caster wheel 31 is equipped with a brake structure.

[0029] In this embodiment, a connector 11 is provided on one side of the outer wall of the telescopic hydraulic cylinder 1, and a handle 6 is provided on the connector 11. The handle 6 is made of high-strength engineering plastic injection molding, and an anti-slip soft rubber layer is provided at the grip. The handle 6 is rotatably connected to the connector 11 and is connected by a hinge. The handle 6 facilitates the movement of the jack.

[0030] In this embodiment, damping devices are provided at the hinge connection points of the hinge connection mechanism 4. The damping devices installed at the hinge connection points are silicone oil dampers. The damping devices are used to limit the rotation angle of the hinge connection mechanism 4 and prevent excessive rotation.

[0031] In this embodiment, both the foot pedal pressure plate 21 and the foot pedal pressure relief plate 22 are provided with anti-slip textures, which are distributed in an interlaced grid pattern.

[0032] Working steps: 1. Push handle 6 to move the jack to the target position. After reaching the work point, step on the brake device of caster wheel 31 to fix the jack and prevent the equipment from sliding during operation.

[0033] 2. When working on a flat surface, simply use the limiting rod to limit and fix the supporting top plate 5 to ensure that it will not tilt before working. If working on an inclined surface, manually adjust the supporting top plate 5 according to the angle of the inclined surface. The supporting top plate 5 is connected to the first base 41 through the second base 42 to form a two-stage hinge connection, which can tilt within a certain range. The tilt angle is limited by the limiting rod.

[0034] 3. Stand next to the support base plate 2 and repeatedly step on the foot pedal pressure plate 21 to transfer the pressure to the inside of the telescopic hydraulic cylinder 1, pushing the telescopic rod to rise slowly. After completing the lifting operation, slowly step on the foot pedal pressure relief plate 22 to make the telescopic rod inside the telescopic hydraulic cylinder 1 slowly descend under the action of the object's gravity and its own structure.

[0035] Fourth, when lifting items of different sizes, the distance between the limit plates 52 can be adjusted to clamp and fix the items to the limit, preventing them from shifting or shaking during lifting.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A telescopic jack, comprising a telescopic hydraulic cylinder (1), characterized in that, The telescopic hydraulic cylinder (1) is provided with a support base plate (2) at the bottom. A support frame (3) is welded to the side of the support base plate (2). A hinge connection mechanism (4) is provided at the top of the telescopic rod inside the telescopic hydraulic cylinder (1). The hinge connection mechanism (4) includes a first base (41) provided at the top of the telescopic rod inside the telescopic hydraulic cylinder (1). A second base (42) is hinged above the first base (41). A support top plate (5) is hinged above the second base (42). Limiting rods (43) are fixed on both sides of the bottom surface of the first base (41) by hinges. Several slots (44) are opened on the first base (41). The limiting rods (43) swing in the slots (44). Limiting rods (45) are provided on both sides of the outer wall of the second base (42).

2. The telescopic jack according to claim 1, characterized in that, The supporting top plate (5) has several adjustment slots (51), and fixing bolts (53) are inserted into the adjustment slots (51). Several limiting plates (52) are provided on the top surface of the supporting top plate (5), and the limiting plates (52) are fixed to the supporting top plate (5) by fixing bolts (53).

3. The telescopic jack according to claim 1, characterized in that, The upper surface of the support base plate (2) is provided with a foot pedal pressure plate (21), and a foot pedal pressure relief plate (22) is provided on one side of the foot pedal pressure plate (21). The oil circuit in the foot pedal pressure plate (21) and the foot pedal pressure plate (21) is connected to the telescopic hydraulic cylinder (1).

4. The telescopic jack according to claim 1, characterized in that, One end of the support frame (3) is provided with a caster wheel (31). The support frame (3) is an I-shaped steel structure, and the caster wheel (31) is equipped with a brake structure.

5. The telescopic jack according to claim 1, characterized in that, A connector (11) is provided on one side of the outer wall of the telescopic hydraulic cylinder (1), and a handle (6) is provided on the connector (11). The handle (6) is rotatably connected to the connector (11).

6. The telescopic jack according to claim 1, characterized in that, The hinge connection points of the hinge connection mechanism (4) are all equipped with damping devices. The damping devices are used to limit the rotation angle of the hinge connection mechanism (4) and prevent it from rotating too flexibly.

7. The telescopic jack according to claim 3, characterized in that, The surfaces of the foot pedal pressure plate (21) and the foot pedal pressure relief plate (22) are provided with anti-slip patterns, which are distributed in an interlaced grid pattern.

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