CN210710502U

CN210710502U - Manual hydraulic jack

Info

Publication number: CN210710502U
Application number: CN201921078545.9U
Authority: CN
Inventors: 赵泉; 赵逢春
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-06-09
Anticipated expiration: 2029-07-11

Abstract

The utility model discloses a manual hydraulic jack, which comprises an oil tank, an oil cylinder, a piston pull rod and a manual oil pump; a piston is arranged in an inner cavity of the oil cylinder, wherein the piston divides the inner cavity of the oil cylinder into an air cavity and a hydraulic cavity which are mutually independent, and an outlet of a piston pull rod of the oil cylinder is communicated with the hydraulic cavity; the tail end of the piston pull rod is fixedly connected with the piston, and the head end of the piston pull rod penetrates through a piston pull rod outlet of the oil cylinder; the manual oil pump comprises a cylinder barrel and a plunger arranged in the cylinder barrel, an inner cavity of the cylinder barrel is communicated with a hydraulic cavity of the oil cylinder through a preset oil conveying pipeline, meanwhile, the inner cavity of the cylinder barrel is communicated with the oil tank through a preset oil suction pipeline, and hydraulic oil stored in the oil tank can be pumped to the hydraulic cavity of the oil cylinder through manually pushing and pulling the plunger in a reciprocating manner; the hydraulic cavity of the oil cylinder is also communicated with the oil tank through a preset oil unloading pipeline so as to enable hydraulic oil in the hydraulic cavity to flow back to the oil tank.

Description

Manual hydraulic jack

Technical Field

The utility model belongs to the technical field of the hydraulic means technique and specifically relates to a manual hydraulic jack hangs is related to.

Background

The hydraulic jack is a common small-sized hoisting tool in our daily life, and is also the simplest hoisting equipment, a rigid jacking member is used as a working device, the principle on which the hydraulic jack is based is the Pascal principle, namely, the pressure intensity of each part of liquid in a closed space is consistent, so that in a balanced system, the pressure exerted on a smaller piston is smaller, the pressure exerted on a larger piston is larger, smaller force can be exerted on the smaller piston, through the transmission of the liquid, the larger piston can jack a heavy object, the common hydraulic jack utilizes the principle to achieve the force transmission, however, the existing hydraulic jack transmits thrust force and cannot transmit tensile force, when the heavy object needs to be pulled up in our work, a larger hoisting machine is usually adopted, the hydraulic lifting appliance is heavy, large in size and generally difficult to carry and carry, the chain block is relatively small, but if a heavy object is lifted, the reliability is poor, when a heavy object needs to be lifted, some people also adopt a method of firstly making a frame, jacking the frame by using a hydraulic jack and then indirectly lifting the heavy object by using the frame, although the problem of lifting the heavy object by using the hydraulic jack is solved by the method, the frame needs to be made in advance, the operation is troublesome, a simple and practical lifting device like the hydraulic jack is absent at present, and great inconvenience is brought to the work needing to lift the heavy object.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and the utility model aims to provide a manual hydraulic jack that compact structure, small size, portable, the practicality is high is provided.

In order to achieve the above purpose, the utility model provides a scheme does: a manual hydraulic jack comprises an oil tank, an oil cylinder, a piston pull rod and a manual oil pump; the inner cavity of the oil cylinder extends along the vertical direction, a piston is arranged in the inner cavity of the oil cylinder, the piston can slide along the inner cavity of the oil cylinder and divides the inner cavity of the oil cylinder into an air cavity and a hydraulic cavity which are mutually independent, and the outlet of a piston pull rod of the oil cylinder is communicated with the hydraulic cavity; the piston pull rod is arranged in the inner cavity of the oil cylinder, the tail end of the piston pull rod is fixedly connected with the piston, and the head end of the piston pull rod penetrates through the piston pull rod outlet of the oil cylinder; the manual oil pump comprises a cylinder barrel and a plunger arranged in the cylinder barrel, an inner cavity of the cylinder barrel is communicated with a hydraulic cavity of the oil cylinder through a preset oil delivery pipeline, meanwhile, the inner cavity of the cylinder barrel is communicated with the oil tank through a preset oil suction pipeline, hydraulic oil stored in the oil tank can be sucked to the hydraulic cavity of the oil cylinder through manually pushing and pulling the plunger in a reciprocating mode, and the oil delivery pipeline and the oil suction pipeline are both provided with hydraulic oil check pieces; the hydraulic cavity of the oil cylinder is also communicated with the oil tank through a preset oil unloading pipeline so as to enable hydraulic oil in the hydraulic cavity to flow back to the oil tank, wherein an oil unloading valve is arranged on the oil unloading pipeline; the oil cylinder is provided with an oil cylinder vent hole for communicating the air cavity with the outside.

Furthermore, the hydraulic cavity is positioned above the air cavity, and the outlet of the piston pull rod of the oil cylinder is arranged at the top of the oil cylinder.

And the piston pull rod further comprises a lifting ring and a pull ring, wherein the lifting ring is fixed at the head end of the piston pull rod, the pull ring is fixed at the bottom of the oil cylinder, and the lifting ring and the pull ring are positioned on the same vertical line.

Furthermore, the air cavity is positioned above the hydraulic cavity, and the outlet of the piston pull rod of the oil cylinder is arranged at the bottom of the oil cylinder.

Further, still include rings and pull ring, wherein, rings are fixed in the top of hydro-cylinder, and the pull ring is fixed in the head end of piston pull rod, and wherein, rings and pull ring are located same vertical line.

Furthermore, the hydraulic oil check piece is a check steel ball.

Further, the oil tank and the oil cylinder share one base.

Compared with the prior art, the utility model has the advantages of compact structure, small volume, light weight and convenient carrying and moving; the jacking rod used for jacking in the traditional hydraulic jack is ingeniously changed into the pull rod used for pulling, the Pascal principle is utilized to realize that great pulling force can be generated by applying small manpower, the hydraulic jack is suitable for lifting heavy objects with large weight, the practicability and the universality are good, the use is not limited by occasions and spaces, the use is flexible, the hydraulic jack can be operated and carried by only one person, and the hydraulic jack is applied to the extension of the Pascal principle.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Wherein, 1-oil tank, 2-oil tank vent hole, 3-oil tank seal ring, 4-oil tank compression nut, 5-oil cylinder vent hole, 6-first fastening nut, 7-hanging ring, 8-second fastening nut, 9-piston, 10-first seal ring, 11-piston pull rod, 12-oil cylinder, 13-plunger, 14-cylinder barrel, 15-second seal ring, 16-first check steel ball, 17-oil suction canal, 18-oil delivery canal, 19-base, 20-second check steel ball, 21-third seal ring, 22-pull ring, 23-piston pull rod outlet, 24-oil discharge canal, 25-oil discharge valve, 26-oil inlet hole, 27-oil delivery pipeline, 28-oil discharge pipeline, 29-oil discharge hole, 30-limit convex ring, 31-air cavity and 32-hydraulic cavity.

Detailed Description

The invention will be further described with reference to the following specific embodiments:

the first embodiment is as follows:

referring to fig. 1, the present embodiment is a hand-operated hydraulic jack, including a base 19, a cylinder 12 and a tank 1 respectively disposed on the base 19, specifically, the bottom of the cylinder 12 and the tank 1 are both open, the cylinder 12 is substantially cylindrical and extends along a vertical direction, the base 19 is provided with a groove for the bottom of the cylinder 12 to be embedded and fixed, meanwhile, the base 19 is provided with an annular groove for the bottom of the tank 1 to be embedded and fixed, the tank 1 surrounds the cylinder 12 and has a through hole at the top for the top of the cylinder 12 to penetrate, the outer circumferential surface of the top of the cylinder 12 is formed with an external thread, a preset tank gland nut 4 is screwed on the top of the cylinder 12 in a thread-fitting manner, so as to tightly press the tank 1 onto the base 19 through the tank gland nut 4 (a tank seal ring 3 is disposed between the tank gland nut 4 and the tank 1 to ensure that the tank 1 is tightly pressed onto the base 19 through the tank gland nut 4 Sealing property of (d); namely, the cylinder 12 and the base 19 form the cylinder 12, the inner wall of the cylinder 12 and the top surface of the base 19 jointly define an inner cavity (the inner cavity of the cylinder 12 extends along the vertical direction) forming the cylinder 12, the tank 1 and the base 19 form the oil tank 1, and the inner wall of the tank 1, the outer wall of the cylinder 12 and the top surface of the base 19 jointly define an inner cavity forming the oil tank 1 for storing hydraulic oil.

In this embodiment, the device further comprises a piston 9 and a piston pull rod 11 which are arranged in the inner cavity of the oil cylinder 12, wherein the piston 9 can slide along the inner cavity of the oil cylinder and divide the inner cavity of the oil cylinder 12 into an air cavity 31 and a hydraulic cavity 32 which are independent of each other, and an outlet 23 of the piston pull rod of the oil cylinder 12 is communicated with the hydraulic cavity 32; specifically, the periphery of the piston 9 is sleeved with a plurality of first sealing rings 10 to ensure that the air cavity 31 and the hydraulic cavity 32 are independent from each other, so that hydraulic oil in the hydraulic cavity 32 is prevented from leaking into the air cavity 31; the tail end of the piston pull rod 11, which is located in the inner cavity of the oil cylinder 12, is fixedly connected with the piston 9 through a second fastening nut 8, specifically, a limit convex ring 30 is formed at or fastened to the tail end of the piston pull rod 11, the piston 9 is sleeved at the tail end of the piston pull rod 11, and then the piston 9 is tightly pressed on the limit convex ring 30 through the second fastening nut 8 screwed to the tail end of the piston pull rod 11 (external threads are formed on the tail end of the piston pull rod 11) (namely, the limit convex ring 30 and the second fastening nut 8 are respectively located at two sides of the piston 9), and the head end of the piston pull rod 11 penetrates through a piston pull rod outlet 23 of the oil cylinder 12, in this embodiment, the hydraulic cavity 32 is located above the air cavity 31, the piston pull rod outlet 23 of the oil cylinder 12 is opened at the top of the oil cylinder 12, the tail end of the piston; further, a lifting ring 7 is formed at the head end of the piston pull rod 11, a pull ring 22 is fastened to the bottom of the oil cylinder 12, namely below a base 19 of the oil cylinder 12, through a first fastening nut 6 (specifically, a connecting rod with an external thread is formed on one side of the pull ring 22, a slot for inserting the connecting rod is formed below the base 19, and then fastening is performed by screwing the first fastening nut 6), and the lifting ring 7 and the pull ring 22 are located on the same vertical line.

In this embodiment, the manual oil pump is further included, the manual oil pump is disposed beside the tank body of the oil tank 1, the manual oil pump is composed of a cylinder 14 in a substantially cylindrical shape and a plunger 13 disposed in an inner cavity of the cylinder 14, the plunger 13 can slide back and forth along the inner cavity of the cylinder 14, and the bottom end of the cylinder 14 is fixedly connected to the base 19 in an interference fit, welding or threaded connection manner.

Furthermore, pipelines for communication are arranged among the cylinder barrel 14, the oil tank 1 and the inner cavity of the oil cylinder 12 to realize the flow of hydraulic oil; specifically, the inner cavity of the cylinder 14 is communicated with the hydraulic cavity 32 of the oil cylinder 12 through a preset oil pipeline, meanwhile, the inner cavity of the cylinder 14 is also communicated with the oil tank 1 through a preset oil suction pipeline, a second check steel ball 20 and a first check steel ball 16 are respectively arranged on the oil delivery pipeline and the oil suction pipeline to prevent the hydraulic oil from flowing backwards, the hydraulic oil stored in the oil tank 1 can be drawn into the hydraulic chamber 32 of the oil cylinder 12 by manually pushing and pulling the plunger 13 back and forth, and, specifically, when the plunger 13 is pulled up (i.e. pulled out of the cylinder 14), a negative pressure is formed in the inner cavity of the cylinder 14, so that the hydraulic oil stored in the inner cavity of the oil tank 1 flows into and fills the inner cavity of the cylinder 14 through the oil suction pipeline, and when the plunger 13 is pushed down (i.e. pushed into the cylinder 14), under the thrust of the plunger 13, the hydraulic oil filled in the inner cavity of the cylinder 14 is pushed to an oil delivery pipeline and is input into the hydraulic cavity 32 of the oil cylinder 12 through the oil delivery pipeline;

in this embodiment, the oil delivery pipeline is composed of an oil delivery channel 18 opened in the base 19 and an oil delivery pipeline 27 arranged in the oil cylinder 12, wherein one end of the oil delivery pipeline 27 is connected with the oil delivery channel 18, and the other end is connected with an oil inlet 26 opened on the oil cylinder 12; the oil suction pipeline is the oil suction channel 17 opened in the base 19.

Further, an oil discharge pipeline is communicated between the hydraulic cavity 32 of the oil cylinder 12 and the oil tank 1, wherein the oil discharge pipeline is provided with an oil discharge valve 25, when the hydraulic oil in the hydraulic cavity 32 needs to be discharged, the oil discharge valve 25 is opened, the piston pull rod 11 is pulled out of the oil cylinder 12, the piston 9 slides towards the piston pull rod outlet 23 of the oil cylinder 12, the volume of the hydraulic cavity 32 is reduced, and the hydraulic oil in the hydraulic cavity 32 can be extruded to enter the oil discharge pipeline and flow through the oil discharge pipeline to flow back into the oil tank 1; in this embodiment, the oil discharge pipeline is composed of an oil discharge channel 24 opened in the base 19 and an oil discharge pipeline 28 arranged in the oil cylinder 12, wherein one end of the oil discharge pipeline 28 is connected with the oil discharge channel 24, and the other end is connected to an oil discharge hole 29 formed on the oil cylinder 12.

Further, the cylinder 12 is provided with a cylinder vent hole 5 for communicating the air cavity 31 with the outside, specifically, the cylinder vent hole 5 is opened on the base 19, when hydraulic oil is injected into the cylinder hydraulic cavity 32, the piston 9 slides towards the base 8, the volume of the hydraulic cavity 32 is increased, the volume of the air cavity 31 is reduced, the air in the air cavity 31 can be discharged outside through the cylinder vent hole 5, so that stable air pressure is always kept in the air cavity 31, when the piston pull rod 11 is pulled out from the cylinder 12, the piston 9 slides towards the piston pull rod outlet of the cylinder 12, the volume of the hydraulic cavity 32 is reduced, the volume of the air cavity 31 is increased, the air cavity 31 sucks supplementary air from the outside through the cylinder vent hole 5, and the air pressure in the air cavity 31 is always kept stable.

In this embodiment, in order to keep the air pressure in the oil tank 1 stable, an oil tank vent hole 2 is opened at the top of the oil tank 1 so as to communicate the inner cavity of the oil tank 1 with the outside.

In the embodiment, in order to make the manual force application more labor-saving and convenient, a conventional lever mechanism (not shown in the figure) is connected to the plunger 13, specifically, the lever mechanism comprises a rocker, the tail end of the rocker is hinged beside one side of the plunger 13, the top end of the plunger 13 is hinged to a rod body of the rocker and connected, according to the well-known lever principle, the longer the rocker is, the closer the plunger 13 is to the hinged tail end of the rocker, the more labor-saving the head end of the rocker is to shake the plunger 13 to drive the plunger 13 to move; an operator can drive the plunger 13 to move upwards by lifting the head end of the rocker, and can drive the plunger 13 to move downwards by pressing the head end of the rocker.

In the embodiment, the specific use process and principle are as follows, in the initial state, the piston pull rod 11 extends into the inner cavity of the oil cylinder 12, and the piston 9 abuts against the bottom wall of the inner cavity of the oil cylinder 12; before use, pulling force needs to be applied to the lifting ring 7 at the head end of the piston pull rod 11 manually to pull the piston pull rod 11 out of the inner cavity of the oil cylinder 12, in the process, an oil unloading valve 25 on an oil unloading pipeline needs to be opened, so that hydraulic oil in a hydraulic cavity 32 of the oil cylinder 12 flows back to the inner cavity of the oil tank 1, when the piston pull rod 11 is pulled out to a limit position (the limit position is that the piston 9 is propped and limited at the piston pull rod outlet of the oil cylinder 12), the maximum extending state of the piston pull rod 11 is achieved, at the moment, the oil unloading valve 25 is closed, the lifting ring at the head end of the piston pull rod 11 is hung on a hook of a preset hanging frame, the pull ring 22 on the base 19 is used for hanging a heavy object to be lifted (the heavy object and the pull ring 22 on the base 19 can be connected by a preset connecting piece such as a steel wire rope, an iron ring chain or a connecting rod), after installation, an operator only needs to lift and press the head end of, the hydraulic oil in the oil tank 1 is pumped to the hydraulic cavity 32 of the oil cylinder 12 again through the oil suction pipeline, the cylinder 14 and the oil delivery pipeline in sequence, because the piston pull rod 11 is fixedly arranged in the embodiment (that is, the piston 9 is fixedly arranged), in the process that the hydraulic oil is filled into the hydraulic cavity 32 to increase the volume of the hydraulic cavity 32, the oil cylinder 12 and the base 19 thereof are lifted upwards by an upward lifting force, so that the heavy object is driven to be lifted by the pull ring 22 of the base 19, and when the piston 9 is pushed against the bottom wall of the inner cavity of the oil cylinder 12 again, the lifting height is the maximum height; and because the diameter of the plunger 13 is far smaller than that of the piston 9, according to the well-known 'Pascal principle', a larger force can be generated on the piston 9 by applying a smaller force on the plunger 13, and a good force-saving effect is achieved by combining a lever mechanism, so that an operator can lift a heavy object with a larger weight by applying a certain force.

In this embodiment, in order to improve the sealing performance of the entire manual lifting crane to avoid leakage of hydraulic oil, a second sealing ring 15 is disposed at a joint between the tank body of the oil tank 1 and the base 19 (i.e., the second sealing ring 15 is disposed on a groove in the base 19 into which the tank body of the oil tank 1 is inserted), and a third sealing ring 21 for blocking hydraulic oil is disposed between the piston rod outlet 23 of the oil cylinder 12 and the piston rod 11.

In actual production and manufacturing, the effective lifting stroke can be increased by increasing the length of the inner cavity of the oil cylinder 12 and the length of the piston pull rod 11, and the lifting height range can be increased.

Example two:

referring to fig. 2, the present embodiment is different from the first embodiment in that: the air cavity 31 is positioned above the hydraulic cavity 32, the piston pull rod outlet 23 of the oil cylinder 12 is arranged at the bottom of the oil cylinder 12, namely the piston pull rod outlet 23 of the oil cylinder 12 is arranged on the base 19, the lifting ring 7 is fastened at the top of the oil cylinder 12 through the first fastening nut 6, and the pull ring 22 is formed at the head end of the piston pull rod 11; secondly, the oil conveying pipeline is the oil conveying channel 18 arranged in the base 19, and the oil unloading pipeline is the oil unloading channel 24 arranged in the base 19, compared with the first embodiment, the oil unloading pipeline and the oil conveying pipeline are only arranged on the base 19, so that the difficulty of manufacturing and production is lower;

in practical use, the hanging ring 7 at the top of the oil cylinder 12 is hung on a preset hook of a fixed hanging bracket, the pull ring 22 at the head end of the piston pull rod 11 is used for hanging a heavy object, in the lifting process, the oil cylinder 12 is fixedly arranged, and the piston pull rod 11 rises upwards to drive the heavy object to lift upwards.

In some preferred embodiments, the oil cylinder 12 is fixed without using the upper lifting ring 7, but the base 19 of the oil cylinder 12 is directly supported or fixed by a preset fixing bracket, so that the structure is more stable, and the lifting process is more stable.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A manual hydraulic jack is characterized in that: comprises an oil tank (1), an oil cylinder (12), a piston pull rod (11) and a manual oil pump; the inner cavity of the oil cylinder (12) extends along the vertical direction, a piston (9) is arranged in the inner cavity of the oil cylinder (12), wherein the piston (9) can slide along the inner cavity of the oil cylinder (12) and divides the inner cavity of the oil cylinder (12) into an air cavity (31) and a hydraulic cavity (32) which are mutually independent, and a piston pull rod outlet (23) of the oil cylinder (12) is communicated with the hydraulic cavity (32); the piston pull rod (11) is arranged in the inner cavity of the oil cylinder (12), the tail end of the piston pull rod is fixedly connected with the piston (9), and the head end of the piston pull rod penetrates through a piston pull rod outlet (23) of the oil cylinder (12); the manual oil pump comprises a cylinder barrel (14) and a plunger (13) arranged in the cylinder barrel (14), the inner cavity of the cylinder barrel (14) is communicated with a hydraulic cavity (32) of the oil cylinder (12) through a preset oil delivery pipeline, meanwhile, the inner cavity of the cylinder barrel (14) is communicated with the oil tank (1) through a preset oil suction pipeline, hydraulic oil stored in the oil tank (1) can be pumped to the hydraulic cavity (32) of the oil cylinder (12) through manually pushing and pulling the plunger (13) in a reciprocating mode, and the oil delivery pipeline and the oil suction pipeline are both provided with hydraulic oil check pieces; the hydraulic cavity (32) of the oil cylinder (12) is also communicated with the oil tank (1) through a preset oil discharge pipeline so as to supply hydraulic oil in the hydraulic cavity (32) to flow back to the oil tank (1), wherein the oil discharge pipeline is provided with an oil discharge valve (25); the oil cylinder (12) is provided with an oil cylinder vent hole (5) for communicating the air cavity (31) with the outside.

2. The manual hydraulic jack of claim 1, wherein: the hydraulic cavity (32) is positioned above the air cavity (31), and a piston pull rod outlet (23) of the oil cylinder (12) is arranged at the top of the oil cylinder (12).

3. The manual hydraulic jack of claim 2, wherein: the piston pull rod structure is characterized by further comprising a lifting ring (7) and a pull ring (22), wherein the lifting ring (7) is fixed at the head end of the piston pull rod (11), the pull ring (22) is fixed at the bottom of the oil cylinder (12), and the lifting ring (7) and the pull ring (22) are located on the same vertical line.

4. The manual hydraulic jack of claim 1, wherein: the air cavity (31) is positioned above the hydraulic cavity (32), and the piston pull rod outlet (23) of the oil cylinder (12) is arranged at the bottom of the oil cylinder (12).

5. The manual hydraulic jack of claim 4, wherein: the piston pull rod device is characterized by further comprising a lifting ring (7) and a pull ring (22), wherein the lifting ring (7) is fixed to the top of the oil cylinder (12), the pull ring (22) is fixed to the head end of the piston pull rod (11), and the lifting ring (7) and the pull ring (22) are located on the same vertical line.

6. The manual hydraulic jack of claim 1, wherein: the hydraulic oil check piece is a check steel ball.

7. The manual hydraulic jack of claim 1, wherein: the oil tank (1) and the oil cylinder (12) share a base (19).