Bidirectional jack with cavity piston rod

Abstract

The utility model relates to the technical field of jacks, in particular to a bidirectional jack with a cavity piston rod, which is characterized in that a plurality of uniformly arrayed supporting columns are fixedly arranged below a jack cylinder sleeve main body, and a pump cylinder is fixedly arranged at the upper end of the jack cylinder sleeve main body, so that hydraulic oil in the pump cylinder is prevented from flowing back into an oil storage tank; a second ball in a second control groove enables hydraulic oil to be conveyed into the inner shell from a second communication groove, the hydraulic oil in the inner shell is prevented from flowing back into the pump cylinder, a third ball in a third control groove conveys the hydraulic oil in the inner shell from a third communication groove into a fourth communication groove, and then the hydraulic oil is returned to an oil storage groove. The spring is used for enabling the third ball to elastically move, the pressure in the inner shell is prevented from being too large, when the pressure in the inner shell is too large, the third ball is pressed, the third ball moves to enable hydraulic oil to flow into the oil storage groove, supporting parts are arranged on the two sides of the jack cylinder sleeve body, and the ejector rod can support objects on the two sides from the two ends at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a double-acting jack with a cavity piston rod. Background Art

[0002] A jack is a mechanical device commonly used to lift or support heavy objects. Its working principle is based on Pascal's law, that is, the pressure of a liquid in a closed container is equal everywhere. A jack is mainly composed of a hydraulic system, including a hydraulic cylinder, a piston, a control valve and a hydraulic pump.

[0003] When the hydraulic pump is manually operated or driven by a power source, it pumps hydraulic oil to the hydraulic cylinder. The control valve controls the flow of hydraulic oil, allowing the oil to enter a chamber of the hydraulic cylinder, pushing the piston upward to lift the weight. By switching the direction of the oil flow through the control valve, the piston can move downward to lower the jack or unload the weight.

[0004] However, the existing jacks can only provide support in one direction. For objects that need to be supported and moved in both directions, it will take more time and require multiple operations, resulting in slow working efficiency. Utility Model Content

[0005] The main purpose of the utility model is to provide a double-acting jack with a cavity piston rod, so as to solve the problem of adding a double-acting jack with a cavity piston rod proposed in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a double-acting jack with a cavity piston rod is provided, including: a jack cylinder liner body, a plurality of support columns in a uniform array are fixedly arranged below the jack cylinder liner body, a pump cylinder is fixedly arranged on the upper end of the jack cylinder liner body, a piston rod is arranged in the pump cylinder, a first sealing gasket is arranged on the side wall of the lower end of the piston rod, a downward pressure part is fixedly arranged on the upper end of the jack cylinder liner body, and a supporting part is fixedly arranged on the side wall of the jack cylinder liner body.

[0007] Furthermore, the pressing portion includes a first fixing block fixedly arranged at the upper end of the fixing shell, a fixing hole is penetrated through the first fixing block, and a handle pressing rod is fixedly arranged in the fixing hole.

[0008] Furthermore, a first fixing plate is fixedly disposed on the lower surface of one end of the first fixing block, a first connecting plate is rotatably disposed on the side wall of the first fixing plate, and a second fixing plate is rotatably disposed on one end of the first connecting plate.

[0009] Furthermore, the support portion includes a top shell, a sealing cover is fixedly provided at one end of the top shell, an inner shell is fixedly provided on the inner wall of the sealing cover, a push rod is provided in the inner shell, a second sealing gasket is provided on the side wall of one end of the push rod, and an oil plug is provided on the side wall of the top shell.

[0010] Furthermore, a first control groove is opened in the main body of the jack cylinder sleeve, a first ball is arranged in the first control groove, a first connecting groove is opened at the lower end of the first control groove, a second connecting groove is opened on one side of the first control groove, a second control groove is opened at one end of the second connecting groove, and a second ball is arranged in the second control groove.

[0011] Furthermore, a third communicating groove is arranged below the second communicating groove, a third control groove is opened at one end of the third communicating groove, and a fourth communicating groove is opened on a side wall of the third control groove.

[0012] Furthermore, a third ball is arranged in the third control groove, a spring is arranged below the third ball, a pressure rod is arranged below the spring, and a connecting rod is fixedly arranged below the pressure rod.

[0013] Furthermore, a rotating rod is fixedly arranged below the connecting rod, and a gripping rod is fixedly arranged on a side wall of the rotating rod.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the first ball in the first control groove is used to transport the hydraulic oil in the oil storage tank from the first connecting groove to the pump cylinder, so as to prevent the hydraulic oil in the pump cylinder from flowing back into the oil storage tank; the second ball in the second control groove is used to transport the hydraulic oil from the second connecting groove to the inner shell, so as to prevent the hydraulic oil in the inner shell from flowing back into the pump cylinder; the third ball in the third control groove is used to transport the hydraulic oil in the inner shell from the third connecting groove to the fourth connecting groove, and then the hydraulic oil is returned to the oil storage tank; the spring is used to allow the third ball to move elastically to avoid excessive pressure in the inner shell; when the pressure in the inner shell is too high, the third ball is pressed, and the third ball moves to allow the hydraulic oil to flow into the oil storage tank; support parts are provided on both sides of the jack cylinder sleeve body, so that the top rod of the support part can support objects on both sides at the same time from both ends, thereby greatly improving the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the rear view of the overall structure of the utility model;

[0017] Figure 3 It is a schematic diagram of a cross-section of the utility model;

[0018] Figure 4It is a side view schematic diagram of the cross section of the utility model.

[0019] Illustration Description:

[0020] 1. Jack cylinder body; 101. Support column; 102. Pump cylinder; 103. Piston rod; 104. First sealing gasket; 105. Fixed shell; 106. First fixed block; 107. First fixed rod; 108. First nut; 109. Handle pressure rod; 110. Fixed hole; 111. First fixed plate; 112. First connecting plate; 113. Second fixed rod; 114. Second nut; 115. Second fixed plate;

[0021] 2. Oil storage tank; 201. Oil plug; 202. Top shell; 203. Inner shell; 204. Push rod; 205. Sealing cover; 206. First connecting groove; 207. First control groove; 208. First ball; 209. Second connecting groove; 210. Second control groove; 211. Second ball; 212. Third connecting groove; 213. Third control groove; 214. Third ball; 215. Spring; 216. Fourth connecting groove; 217. Second sealing gasket; 218. Pressing rod; 219. Connecting rod; 220. Rotating rod; 221. Grip rod. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] See also Figures 1 to 4 The present embodiment provides a double-acting jack with a cavity piston rod, comprising: a jack cylinder body 1, a plurality of support columns 101 in a uniform array are fixedly arranged below the jack cylinder body 1, a pump cylinder 102 is fixedly arranged at the upper end of the jack cylinder body 1, a piston rod 103 is arranged in the pump cylinder 102, a first sealing gasket 104 is arranged on the side wall of the lower end of the piston rod 103, a downward pressure portion is fixedly arranged at the upper end of the jack cylinder body 1, and a supporting portion is fixedly arranged on the side wall of the jack cylinder body 1. The jack cylinder body 1 is used to fix the support column 101, the piston rod 103 moves up and down in the pump cylinder 102 to move the top rod 204 of the supporting portion out, the first sealing gasket 104 is used to make the sealing between the piston rod 103 and the pump cylinder 102 better, and the hydraulic oil is moved into the inner shell 203 and the top rod 204 by air pressure to move the top rod 204 out, and the downward pressure portion is used to drive the piston rod 103 to move up and down.

[0024] The pressing part includes a first fixing block 106 fixedly arranged at the upper end of the fixing shell 105, a fixing hole 110 is formed through the first fixing block 106, and a handle pressing rod 109 is fixedly arranged in the fixing hole 110. The first fixing rod 107 fixes the fixing shell 105 to the side wall of the piston rod 103, and the first nut 108 tightens and fixes the first fixing rod 107 and the fixing shell 105 from both ends of the first fixing rod 107. The fixing hole 110 is used to fix the handle pressing rod 109, and the handle pressing rod 109 is used for the operator to hold and move up and down to drive the piston rod 103 to move up and down.

[0025] A first fixing plate 111 is fixedly disposed on the lower surface of one end of the first fixing block 106, a first connecting plate 112 is rotatably disposed on the side wall of the first fixing plate 111, and a second fixing plate 115 is rotatably disposed on one end of the first connecting plate 112. A second fixing rod 113 and a second nut 114 rotatably fix one end of the first connecting plate 112 to the side wall of the first fixing plate 111, and a second fixing rod 113 and a second nut 114 rotatably fix the other end of the first connecting plate 112 to the side wall of the second fixing plate 115.

[0026] The support part includes a top shell 202, a sealing cover 205 is fixedly provided at one end of the top shell 202, an inner shell 203 is fixedly provided on the inner wall of the sealing cover 205, a push rod 204 is provided in the inner shell 203, a second sealing gasket 217 is provided on the side wall of one end of the push rod 204, and an oil plug 201 is provided on the side wall of the top shell 202. The sealing cover 205 is used to seal one end of the top shell 202, the oil storage tank 2 between the top shell 202 and the inner shell 203 is used to store hydraulic oil, the second sealing gasket 217 is used to seal the gap between the push rod 204 and the inner shell 203, and the oil plug 201 is used to open and add hydraulic oil into the oil storage tank 2, and then seal the top shell 202 to prevent the hydraulic oil from leaking.

[0027] A first control groove 207 is provided in the main body 1 of the jack cylinder sleeve, a first ball 208 is arranged in the first control groove 207, a first connecting groove 206 is provided at the lower end of the first control groove 207, a second connecting groove 209 is provided on one side of the first control groove 207, a second control groove 210 is provided at one end of the second connecting groove 209, and a second ball 211 is arranged in the second control groove 210. The first ball 208 in the first control groove 207 is used to allow the hydraulic oil in the oil storage tank 2 to be transported from the first connecting groove 206 to the pump cylinder 102, so as to prevent the hydraulic oil in the pump cylinder 102 from flowing back into the oil storage tank 2, and the second ball 211 in the second control groove 210 is used to allow the hydraulic oil to be transported from the second connecting groove 209 to the inner shell 203, so as to prevent the hydraulic oil in the inner shell 203 from flowing back into the pump cylinder 102.

[0028] A third connecting groove 212 is arranged below the second connecting groove 209, a third control groove 213 is opened at one end of the third connecting groove 212, a fourth connecting groove 216 is opened on the side wall of the third control groove 213, a third ball 214 is arranged in the third control groove 213, a spring 215 is arranged below the third ball 214, a pressure rod 218 is arranged below the spring 215, a connecting rod 219 is fixedly arranged below the pressure rod 218, a rotating rod 220 is fixedly arranged below the connecting rod 219, and a gripping rod 221 is fixedly arranged on the side wall of the rotating rod 220. The third ball 214 in the third control groove 213 is used to transport the hydraulic oil in the inner shell 203 from the third connecting groove 212 to the fourth connecting groove 216 and then return the hydraulic oil to the oil storage tank 2. The spring 215 is used to allow the third ball 214 to move elastically to avoid excessive pressure in the inner shell 203. When the pressure in the inner shell 203 is too high, the third ball 214 is compressed, and the third ball 214 moves to allow the hydraulic oil to flow into the oil storage tank 2. When the jack completes the support and needs to return to its original position, the grip rod 221 is used to drive the rotating rod 220 to rotate, and the pressure rod 218 is moved downward, so that the third ball 214 moves downward to allow the hydraulic oil to flow into the oil storage tank 2.

[0029] First, use the handle pressure rod 109 to move up and down to drive the piston rod 103 to move up and down in the pump cylinder 102, and use the hydraulic oil to move the top rod 204 of the support part out. When the top rod 204 needs to return to its original position, use the grip rod 221 to drive the rotating rod 220 to rotate, move the pressure rod 218 downward, and move the third ball 214 downward to allow the hydraulic oil to flow into the oil storage tank 2. The top rod 204 can return to its original position. When hydraulic oil needs to be added, open the oil plug 201 and add the hydraulic oil into the oil storage tank 2, and then seal the top shell 202 to prevent the hydraulic oil from leaking.

[0030] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A double-acting jack with a cavity piston rod, comprising a jack cylinder body (1), characterized in that: A plurality of support columns (101) are fixedly arranged in a uniform array below the jack cylinder body (1); a pump cylinder (102) is fixedly arranged at the upper end of the jack cylinder body (1); a piston rod (103) is arranged in the pump cylinder (102); a first sealing gasket (104) is arranged on the side wall of the lower end of the piston rod (103); a downward pressing portion is fixedly arranged at the upper end of the jack cylinder body (1); and a supporting portion is fixedly arranged on the side wall of the jack cylinder body (1).

2. A double-acting jack with a cavity piston rod according to claim 1, characterized in that: The pressing portion comprises a fixing shell (105) having a first fixing block (106) fixedly arranged at the upper end thereof, a fixing hole (110) penetrating through the first fixing block (106), and a handle pressing rod (109) fixedly arranged in the fixing hole (110).

3. A double-acting jack with a cavity piston rod according to claim 2, characterized in that: A first fixing plate (111) is fixedly disposed on the lower surface of one end of the first fixing block (106), a first connecting plate (112) is rotatably disposed on the side wall of the first fixing plate (111), and a second fixing plate (115) is rotatably disposed on one end of the first connecting plate (112).

4. A double-acting jack with a cavity piston rod according to claim 3, characterized in that: The support portion comprises a top shell (202), a sealing cover (205) is fixedly provided at one end of the top shell (202), an inner shell (203) is fixedly provided on the inner wall of the sealing cover (205), a top rod (204) is provided in the inner shell (203), a second sealing gasket (217) is provided on the side wall of one end of the top rod (204), and an oil plug (201) is provided on the side wall of the top shell (202).

5. A double-acting jack with a cavity piston rod according to claim 4, characterized in that: A first control groove (207) is provided in the jack cylinder body (1), a first ball (208) is arranged in the first control groove (207), a first connecting groove (206) is provided at the lower end of the first control groove (207), a second connecting groove (209) is provided on one side of the first control groove (207), a second control groove (210) is provided at one end of the second connecting groove (209), and a second ball (211) is arranged in the second control groove (210).

6. A double-acting jack with a cavity piston rod according to claim 5, characterized in that: A third communicating groove (212) is provided below the second communicating groove (209), a third control groove (213) is provided at one end of the third communicating groove (212), and a fourth communicating groove (216) is provided on the side wall of the third control groove (213).

7. A double-acting jack with a cavity piston rod according to claim 6, characterized in that: A third ball (214) is disposed in the third control groove (213), a spring (215) is disposed below the third ball (214), a pressure rod (218) is disposed below the spring (215), and a connecting rod (219) is fixedly disposed below the pressure rod (218).

8. A double-acting jack with a cavity piston rod according to claim 7, characterized in that: A rotating rod (220) is fixedly disposed below the connecting rod (219), and a grip rod (221) is fixedly disposed on the side wall of the rotating rod (220).

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