Self-locking hydraulic jack

Abstract

The utility model discloses a self-locking hydraulic jack which comprises a jack body, a plurality of supporting blocks and a plurality of supporting rod assemblies. A piston rod of the jack body is connected with a jacking seat, and the lower end of the jack body is provided with a base. One end of each supporting block is installed in a containing hole channel in the side portion of the base in a sliding mode, and the base is provided with a locking piece used for locking the multiple supporting blocks. The supporting rod assembly comprises an upper inserting rod and a lower sleeve, the lower end of the upper inserting rod is movably inserted into the lower sleeve, the upper end of the upper inserting rod is hinged to the top supporting base, and the lower end of the lower sleeve is hinged to the other end of the supporting block. A row of clamping teeth are formed on the upper inserting rod, and the tooth faces of the upper sides of the clamping teeth are obliquely arranged. A locking block is elastically installed on the inner wall of the lower sleeve, a limiting protruding edge is formed on one side of the locking block, and the limiting protruding edge is movably embedded in the limiting groove between the adjacent clamping teeth. The hydraulic jack solves the problems that an existing hydraulic jack is prone to toppling over, and potential safety hazards are generated due to pressure loss of the hydraulic jack.

Description

TECHNICAL FIELD

[0001] The utility model relates to jack technical field, concretely relates to a self locking hydraulic jack. BACKGROUND

[0002] Hydraulic jack is a common tool for lifting heavy objects, it adopts hydraulic principle, and the heavy object is lifted through the hydraulic pressure. It is usually composed of main body, hydraulic cylinder, pump handle and hydraulic oil, etc. When using, the operator injects hydraulic oil into the hydraulic cylinder through the pump handle, thereby increasing the pressure in the hydraulic cylinder, so that the jack can lift the heavy object. Hydraulic jack is widely used in the field of automobile repair, engineering construction and the like due to its simple structure, large lifting force, convenient operation and the like.

[0003] The hydraulic jack in the prior art is in a columnar shape, when the weight distribution of the heavy object is uneven during lifting, the piston rod of the jack may be unevenly stressed, and the hydraulic jack is prone to falling to one side. In addition, when the hydraulic oil circuit and the like of the hydraulic jack leak, the hydraulic jack may lose pressure, and safety accidents are prone to occur.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model, and should not be regarded as acknowledging or implicitly implying that this information constitutes prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the defects in the prior art, the present utility model provides a self locking hydraulic jack to solve the problems that the existing hydraulic jack is prone to falling and the hydraulic jack loses pressure to cause safety hazards.

[0006] In order to achieve the above-mentioned purpose, a self locking hydraulic jack is provided, which comprises:

[0007] A jack body, the upper part of the piston rod of the jack body is connected with a supporting seat, and the lower end of the jack body is installed with a base;

[0008] A plurality of supporting blocks, the side part of the base forms a plurality of accommodating channels, the plurality of accommodating channels are arranged at intervals along the circumferential direction of the base, one end of the supporting block is movably arranged in the accommodating channel along the length direction of the accommodating channel, and the base is installed with a locking piece for locking the plurality of supporting blocks;

[0009] A plurality of support rod assemblies are arranged at intervals along the circumferential direction of the roof support base, and each of the support rod assemblies comprises a coaxially arranged upper insertion rod and a lower sleeve, the lower end of the upper insertion rod is movably inserted into the lower sleeve, the upper end of the upper insertion rod is hingedly connected to the roof support base, the lower end of the lower sleeve is hingedly connected to the other end of the support block, the side of the upper insertion rod is formed with a row of clamping teeth arranged along the length direction of the upper insertion rod, the upper side of the clamping teeth is obliquely arranged towards the lower end of the upper insertion rod, and the adjacent clamping teeth and the side wall of the upper insertion rod form a limiting groove therebetween, the inner side of the wall of the lower sleeve is elastically mounted with a locking block, one side of the locking block is formed with a plurality of limiting convex ridges arranged along the height direction of the locking block, and the limiting convex ridges are movably embedded in the limiting groove, after the piston rod is elongated to allow the roof support base to pull the upper insertion rod, the limiting convex ridges slide into the limiting groove below the upper side of the clamping teeth to prevent the upper insertion rod from sliding towards the lower end of the lower sleeve.

[0010] Further, the side of the upper insertion rod is provided with a guide groove arranged along the length direction of the upper insertion rod, and the inner wall of the lower sleeve is formed with a guide block slidingly arranged in the guide groove.

[0011] Further, the top of the support block is formed with a plurality of positioning grooves penetrating through the opposite sides of the top, the plurality of positioning grooves are arranged at intervals along the length direction of the support block, the side of the base is formed with external threads, the locking member is a sleeve ring, the inner ring surface of the sleeve ring is formed with internal threads, the sleeve ring is screwed to the external threads of the base, and the lower end of the sleeve ring is movably embedded in the positioning grooves of the plurality of support blocks.

[0012] Further, the outer side of the wall of the lower sleeve is mounted with a bottomed support box without a cover, the box opening of the support box is arranged towards the wall, the wall is provided with an opening aligned with the box opening, and the other side of the locking block extends into the support box through the opening and is elastically mounted to the inner wall of the support box by a spring.

[0013] Further, the locking block is a magnetic metal block, the inner side of the box bottom of the support box is mounted with an electromagnetic member, and the locking block is magnetically attracted to the electromagnetic member after the electromagnetic member is energized, so that one side of the locking block retreats into the support box.

[0014] Further, the bottom of the other end of the support block is connected with a pad plate.

[0015] The self-locking hydraulic jack has the advantages that the supporting area of the base is increased by drawing out the four supporting blocks from the base by a proper distance and locking the four supporting blocks by using the sleeve ring; after the jack lifts the target component, the supporting rod assembly is supported between the top supporting seat and the supporting blocks, the top supporting seat, the supporting rod assembly, the supporting blocks and the base form a circular table-shaped compression-resistant whole to disperse the pressure received by the jack body, increase the compression resistance and overturning resistance of the jack body and improve the stability of the jack body during use.

[0016] The self-locking hydraulic jack has the advantages that the supporting area of the base is increased by drawing out the four supporting blocks from the base by a proper distance and locking the four supporting blocks by using the sleeve ring; after the jack lifts the target component, the supporting rod assembly is supported between the top supporting seat and the supporting blocks, the top supporting seat, the supporting rod assembly, the supporting blocks and the base form a circular table-shaped compression-resistant whole to disperse the pressure received by the jack body, increase the compression resistance and overturning resistance of the jack body and improve the stability of the jack body during use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings:

[0018] Figure 1 The utility model discloses a self-locking hydraulic jack's structure schematic drawing.

[0019] Figure 2 The utility model discloses a supporting block's structure schematic drawing.

[0020] Figure 3 The utility model discloses a supporting rod assembly's sectional view.

[0021] Figure 4 The utility model discloses a lock block's structure schematic drawing.

[0022] Figure 5 The utility model discloses a self-locking hydraulic jack's retracted state schematic drawing. DETAILED DESCRIPTION

[0023] The application will be further described in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings.

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0025] Referring toFigures 1 to 5 The utility model provides a self locking type hydraulic jack, include: jack body 1, a plurality of support blocks 4 and a plurality of support rod assemblies 5.

[0026] The upper portion of the piston rod 11 of the jack body 1 is connected with a supporting seat 2, and the lower end of the jack body 1 is installed with a base 3. In the embodiment, the supporting seat 2 and the base 3 are both in the shape of a cylinder.

[0027] The side portion of the base 3 is formed with a plurality of accommodating channels, the plurality of accommodating channels are arranged at intervals along the circumferential direction of the base 3, and the plurality of support blocks 4 are installed in the plurality of accommodating channels one by one in a corresponding manner.

[0028] Referring to Figure 1 and Figure 2 , one end of the support block 4 is movably slidably arranged in the accommodating channel along the length direction of the accommodating channel, and the other end of the support block 4 extends to the outside of the accommodating channel. The base 3 is installed with a locking member for locking the plurality of support blocks 4.

[0029] Specifically, the top portion of the support block 4 is formed with a plurality of positioning grooves b, and the plurality of positioning grooves b are arranged at intervals along the length direction of the support block 4. The positioning grooves b are in the shape of an arc and penetrate through the opposite sides of the top portion of the support block 4. The side portion of the base 3 is formed with external threads, the locking member is a sleeve ring 31, the inner annular surface of the sleeve ring 31 is formed with internal threads, and the sleeve ring 31 is screwed to the external threads of the base 3. The lower end of the sleeve ring 31 is movably embedded in the positioning grooves b of the plurality of support blocks 4 so as to lock the plurality of support blocks 4.

[0030] In the embodiment, a plurality of support rod assemblies 5 are arranged, and the plurality of support rod assemblies 5 are arranged at intervals along the circumferential direction of the supporting seat 2. In combination with Figure 1 , Figure 3 , the support rod assembly 5 comprises coaxially arranged upper inserting rods 51 and lower sleeve pipes 52, and the lower end of the upper inserting rod 51 is movably inserted into the lower sleeve pipe 52. The upper end of the upper inserting rod 51 is hingedly connected to the supporting seat 2, and the lower end of the lower sleeve pipe 52 is hingedly connected to the other end of the support block 4.

[0031] As a preferred embodiment, the side portion of the upper inserting rod 51 is provided with a guide groove arranged along the length direction of the upper inserting rod 51, and the inner wall of the lower sleeve pipe 52 is formed with a guide block slidably arranged in the guide groove. Through the cooperation of the guide block and the guide groove, the extension and contraction of the support rod assembly 5 are more stable, and the structure of the support rod assembly 5 is more stable and reliable.

[0032] Continuing to refer to Figure 3As shown, the side of the upper inserting rod 51 is formed with a row of clamping teeth 511, which are arranged along the length direction of the upper inserting rod 51. The upper side tooth surface of the clamping teeth 511 is obliquely arranged towards the lower end direction of the upper inserting rod 51. The adjacent clamping teeth 511 and the side wall of the upper inserting rod 51 enclose a limiting groove a.

[0033] The inner side of the pipe wall of the lower sleeve 52 is elastically mounted with a lock block 6. As a preferred embodiment, the outer side of the pipe wall of the lower sleeve 52 is mounted with a supporting box 521, which is bottomed and has no cover, and the box opening of the supporting box 521 is arranged towards the pipe wall of the lower sleeve 52. The pipe wall of the lower sleeve 52 is provided with an opening which is aligned with the box opening, and the other side (facing away from the upper inserting rod 51) of the lock block 6 extends into the supporting box 521 through the opening of the lower sleeve 52, and the other side of the lock block 6 is elastically mounted to the inner wall of the supporting box 521 by a spring.

[0034] In combination Figure 3 , Figure 4 As shown, the other side (facing towards the upper inserting rod 51) of the lock block 6 is formed with a plurality of limiting convex beads 61, which are arranged in the height direction of the lock block 6. The plurality of limiting convex beads 61 of the lock block 6 are respectively movably embedded in the plurality of limiting grooves a of the upper inserting rod 51.

[0035] As a preferred embodiment, the lock block 6 is a magnetic metal block, and the inner side of the box bottom of the supporting box 521 is mounted with an electromagnetic member 7, which magnetically attracts the lock block 6 after being electrified, so that the other side of the lock block 6 retreats into the supporting box 521.

[0036] When the self-locking hydraulic jack of the utility model is used, first of all, the supporting blocks 4 are pulled out from the accommodating hole of the base 3 by a proper distance according to the size of the operation space, then the sleeve ring 31 is rotated, so that the lower end of the sleeve ring 31 is inserted into the positioning groove b of the plurality of supporting blocks 4, thereby locking the plurality of supporting blocks 4, and then the supporting area of the base 3 is expanded.

[0037] After the self-locking hydraulic jack is placed below the target component, the operator starts the jack body 1, and the piston rod 11 is elongated to support the target component. In this process, the supporting seat 2 pulls the upper inserting rod 51 upwards, so that the supporting rod assembly 5 is adaptively elongated.

[0038] After the support of the target component is completed, the piston rod stops elongating. The limiting convex beads 61 of the lock block 6 slide into the limiting grooves below the lock block (of the limiting convex beads 61) under the guidance of the upper side tooth surface of the clamping teeth 511, and the limiting convex beads 61 are supported on the clamping teeth 511, thereby preventing the upper inserting rod 51 from sliding towards the lower end of the lower sleeve 52, so that the plurality of supporting rod assemblies 5 are supported between the supporting seat 2 and the plurality of supporting blocks 4.

[0039] The self-locking hydraulic jack of the utility model, through installing the top support base 2 on the top of the piston rod 11, the bearing area of the piston rod is increased, through four supporting blocks 4, the supporting area of the base 3 is increased, after the jack body 1 lifts the target component, the supporting rod assembly 5 is supported between the top support base and the supporting block, the top support base 2, the supporting rod assembly 5, the supporting block 4 and the base 3 form the compression resistance whole of the circular table shape, thereby dispersing the pressure received by the jack body 1, increasing the compression resistance of the jack body 1, and at the same time, the overturning resistance of the jack body 1 is also strengthened, thereby improving the stability of the jack body 1 when in use.

[0040] The self-locking hydraulic jack of the utility model, through the cooperation of the limiting convex ridge 61 of the locking block and the clamping tooth 511 of the upper inserting rod, the function of preventing retreat is played, when the piston rod 11 of the jack body 1 is elongated, the top support base 2 pulls the upper inserting rod 51 upwards, and the supporting rod assembly 5 is adaptively elongated along the piston rod 11, when the jack body 1 loses pressure, the limiting convex ridge 61 is supported on the clamping tooth 511, thereby preventing the supporting rod assembly 5 from shortening, and further making the multiple supporting rod assemblies 5 continue to play the supporting role, reducing the safety hidden danger of the hydraulic jack when in use, and making the use of the hydraulic jack more safe.

[0041] As shown in Figs. Figure 1 , As shown in Figs. Figure 5 When the self-locking hydraulic jack is used, the electromagnetic part 7 is energized, thereby making the electromagnetic part 7 magnetically attract the locking block 6, making one side of the locking block 6 retreat into the supporting box 521, and further making the limiting convex ridge 61 separate from the limiting groove a, after the piston rod 11 is lowered and reset, the sleeve ring 31 is rotated to make the sleeve ring 31 separate from the positioning groove b of the supporting block 4, and the supporting block 4 is pushed towards the hole bottom of the accommodating hole of the base 3, finally, the multiple supporting blocks 4 are locked through the sleeve ring, thereby completing the folding of the supporting block 4 and the supporting rod assembly 5, and reducing the occupied space of the self-locking hydraulic jack.

[0042] As a preferable implementation, the bottom of the other end of the supporting block 4 is connected with the pad plate 41.

[0043] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the utility model range involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by the arbitrary combination of the above technical features or equivalent features without departing from the utility model concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the application (but not limited to) having similar functions.

Claims

1. A self-locking hydraulic jack, characterized by, The utility model provides a jack body, the upper part of the piston rod of the jack body is connected with a roof support base, the lower end of the jack body is installed with a base; A plurality of support blocks, the side of the base forms a plurality of accommodating channels, the plurality of accommodating channels are arranged along the circumferential direction of the base, one end of the support block is movably arranged in the accommodating channel along the length direction of the accommodating channel, the base is installed with a locking member for locking the plurality of support blocks; A plurality of support rod assemblies are arranged along the circumferential direction of the roof support base, the support rod assembly comprises coaxially arranged upper insertion rods and lower sleeves, the lower end of the upper insertion rod is movably inserted into the lower sleeve, the upper end of the upper insertion rod is hinged to the roof support base, the lower end of the lower sleeve is hinged to the other end of the support block, the side of the upper insertion rod forms a row of clamping teeth arranged along the length direction of the upper insertion rod, the upper side of the clamping teeth is obliquely arranged towards the lower end of the upper insertion rod, the adjacent clamping teeth and the side wall of the upper insertion rod form a limiting groove, the inner side of the pipe wall of the lower sleeve is elastically installed with a locking block, one side of the locking block forms a plurality of limiting convex ribs arranged along the height direction of the locking block, the limiting convex rib is movably embedded in the limiting groove, after the piston rod is elongated to make the roof support base pull the upper insertion rod, the limiting convex rib slides into the limiting groove below the upper side of the clamping teeth to prevent the upper insertion rod from sliding towards the lower end of the lower sleeve. The side of the upper insertion rod is provided with a guide groove arranged along the length direction of the upper insertion rod, the inner wall of the lower sleeve is formed with a guide block, and the guide block is slidably arranged in the guide groove.

2. The self-locking hydraulic jack according to claim 1, characterized in that, The top of the support block is formed with a plurality of positioning grooves penetrating through the opposite sides of the top, the plurality of positioning grooves are arranged along the length direction of the support block, the side of the base is formed with external threads, the locking member is a sleeve ring, the inner ring surface of the sleeve ring is formed with internal threads, the sleeve ring is screwed on the external threads of the base, and the lower end of the sleeve ring is movably embedded in the positioning groove of the plurality of support blocks.

3. The self-locking hydraulic jack of claim 1, wherein, The outer side of the pipe wall of the lower sleeve is installed with a bottomed support box without a cover, the box opening of the support box is arranged towards the pipe wall, the pipe wall is provided with an opening aligned with the box opening, the other side of the locking block extends into the support box through the opening and is elastically installed on the inner wall of the support box through a spring.

4. The self-locking hydraulic jack of claim 1, wherein, The locking block is a magnetic metal block, the inner side of the box bottom of the support box is installed with an electromagnetic member, and the locking block is magnetically attracted to the electromagnetic member after being electrified so that one side of the locking block retreats into the support box.

5. The self-locking hydraulic jack of claim 4, wherein, The other end of the support block is connected with a pad plate.

6. The self-locking hydraulic jack of claim 1, wherein, ​

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