Oil leakage prevention hydraulic jack

Abstract

The utility model relates to the technical field of jacks, and discloses an oil leakage prevention hydraulic jack which is characterized in that steel balls are connected to the outer walls of mounting rods on the two sides, first springs are arranged outside the mounting rods on the two sides, and connecting blocks are connected to the interiors of a first oil inlet and a second oil inlet; according to the oil leakage prevention hydraulic jack, when the piston block moves upwards, due to the fact that the lower portion of the sealing cover is fixed to the sealing sleeve, the sealing sleeve can contract along with the piston block, and the piston block can be prevented from leaking out of the piston block. In this way, the upper end of the pump body can be completely sealed through the sealing cover and the sealing sleeve, oil leakage of the pump body is effectively prevented, secondly, hydraulic oil is prevented from leaking from the abutting joint position of the piston rod and the inner wall of the cylinder body through the arrangement of the oil sealing rings on the two sides, backflow of the hydraulic oil during use is avoided, and therefore the safety and reliability of the hydraulic jack can be greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of jack technology, specifically a leak-proof hydraulic jack. Background Technology

[0002] Hydraulic jacks are lifting tools that utilize hydraulic principles and are widely used in automotive repair, construction, and industrial fields. However, some hydraulic jacks have hydraulic oil leakage issues when the plunger is moved, causing the jack to drop suddenly and compromising safety. Furthermore, a longer jack handle requires less force to operate, making lifting easier, and reducing fatigue during frequent use. However, some jacks do not allow for flexible handle length adjustment based on the working environment. Therefore, improvements are needed to address the current situation. Utility Model Content

[0003] In response to the above situation and to overcome the shortcomings of the existing technology, this utility model provides a leak-proof hydraulic jack, which effectively solves the problem that hydraulic jacks are lifting tools that use hydraulic principles and are widely used in automotive repair, construction, and industrial fields. However, some hydraulic jacks are prone to hydraulic oil leakage when the plunger is moved, causing the jack to drop suddenly and resulting in insufficient safety. Secondly, the longer the jack handle, the less force is required during operation, making lifting easier. When used frequently, a longer handle can reduce fatigue. However, some jacks cannot freely adjust the length of the handle according to the working environment.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof hydraulic jack, comprising a base, a pump body, and a cylinder body, wherein the pump body is installed on the left side of the top of the base, the cylinder body is installed on the right side of the top of the base, and leak-proof components are provided inside the pump body and the cylinder body.

[0005] The leak-proof assembly includes an oil storage chamber located inside the cylinder body. An oil inlet groove is provided inside the base, with a first oil inlet located inside the oil inlet body. A second oil inlet is also provided inside the oil inlet groove, located inside the cylinder body. Mounting rods are connected to both sides of the inner wall of the oil inlet groove, with steel balls connected to the outer walls of the mounting rods. A first spring is installed on the outer side of each mounting rod. Connecting blocks and stop blocks are connected inside both the first and second oil inlets. The connecting blocks on both sides are arranged in opposite directions to the stop blocks on both sides. A piston rod is connected inside the cylinder. A support plate is connected to the top of the piston rod. A bracket is connected to the top of the base. A sleeve is connected inside the bracket. A handle is connected inside the sleeve. A connecting rod is connected to the bottom of the sleeve. A piston block is connected inside the pump body. The bottom end of the connecting rod is connected to the piston block. A sealing cover is connected to the top of the base. A sealing sleeve is connected to the outer wall of the piston block. The sealing sleeve is connected to the sealing cover. Oil seal rings are connected to the inner wall of the cylinder and the outer wall of the piston rod. An auxiliary component is installed inside the sleeve.

[0006] Preferably, a limiting ring is connected to the inner wall of the pump body, and the limiting ring is located above the piston block.

[0007] Preferably, sealing rings are connected to both sides of the top of the base, and both sealing rings are connected to the outer walls of the pump body and the cylinder body.

[0008] Preferably, the top of the base is connected to an oil return pipe, the outer wall of the oil return pipe is connected to a switch valve, the inside of the base is provided with an oil return groove, and the inside of the oil return groove is provided with a sealing plug.

[0009] Preferably, the auxiliary component includes a mounting groove, with the mounting grooves on both sides being disposed inside the handle. A second spring is connected inside the mounting grooves on both sides, and a positioning block is connected to one side of each of the second springs on both sides. A third spring is connected inside the sleeve, and a push plate is connected to one side of the third spring. Positioning holes are evenly provided on both sides of the outer wall of the sleeve.

[0010] Preferably, a stabilizing rod is connected to one side of the push plate, and one end of the stabilizing rod is located inside the sleeve.

[0011] Preferably, the outer walls of the two positioning blocks are inclined, and the two positioning blocks are arranged opposite to each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Press or lift the handle. The handle can drive the piston block to go down or up through the connecting frame. When the piston block moves up, it can draw the hydraulic oil in the oil storage chamber into the pump body. Then, when the piston block moves down, the hydraulic oil in the pump body can move into the cylinder body through the oil inlet groove, thereby causing the piston rod to move up and provide support for the object. When the piston block moves up, the sealing cover is fixed to the sealing sleeve, so the sealing sleeve will shrink accordingly. In this way, the sealing cover and sealing sleeve can completely seal the upper end of the pump body, effectively preventing the pump body from leaking oil. Secondly, the oil seal rings on both sides prevent hydraulic oil from leaking out from the contact point between the piston rod and the inner wall of the cylinder body, and prevent hydraulic oil backflow during use. This can greatly improve the safety and reliability of the hydraulic jack.

[0014] 2. When the piston block moves down, the hydraulic oil flows in the oil inlet groove. At this time, the steel balls on both sides move up as the hydraulic oil flows. The steel ball on the left enters the interior of the left connecting block, thus opening the first oil inlet. The steel ball on the right moves up to the interior of the right stop block, closing the second oil inlet. This prevents the hydraulic oil from entering the oil storage chamber. When the piston block moves up, the opening and closing states of the first and second oil inlets are reversed, thus enabling the hydraulic jack to work stably.

[0015] 3. When the position of the handle needs to be adjusted, push the handle forward to slide the positioning blocks on both sides into the mounting slots on both sides. Then rotate the handle to make the positioning blocks on both sides abut against the inner wall of the sleeve. At this time, the handle can be pulled back and forth, allowing the operator to freely adjust the position of the handle and press the handle down. After the handle is moved to the appropriate position, rotate the handle again to make the positioning blocks on both sides re-enter the corresponding positioning holes. At this time, the handle can be fixed and made easy for the operator to use. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the oil inlet groove structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connecting block structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the cylinder structure of this utility model;

[0022] Figure 5This is a schematic diagram of the oil return groove structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the handle structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the positioning block structure of this utility model.

[0025] In the diagram: 100, base; 200, pump body; 201, cylinder body; 202, oil reservoir; 203, oil inlet groove; 204, first oil inlet; 205, second oil inlet; 206, mounting rod; 207, steel ball; 208, first spring; 209, connecting block; 210, stop block; 211, piston rod; 212, support plate; 213, bracket; 214, sleeve; 215, handle; 216. 217. Connecting rod; 218. Piston block; 219. Sealing cap; 220. Sealing sleeve; 221. Oil seal ring; 222. Limiting ring; 222. Sealing ring; 300. Oil return pipe; 301. Switch valve; 302. Oil return groove; 303. Sealing plug; 400. Mounting groove; 401. Second spring; 402. Positioning block; 403. Third spring; 404. Push plate; 405. Positioning hole; 406. Stabilizer bar. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7 A leak-proof hydraulic jack includes a base 100, a pump body 200, and a cylinder body 201. The pump body 200 is fixedly installed on the left side of the top of the base 100, and the cylinder body 201 is fixedly installed on the right side of the top of the base 100. Leak-proof components are provided inside the pump body 200 and the cylinder body 201.

[0028] The leak-proof component includes an oil reservoir 202, which is located inside the cylinder body 201. An oil inlet groove 203 is located inside the base 100, and a first oil inlet 204 is located inside the oil inlet groove 203, inside the pump body 200. A second oil inlet 205 is located inside the oil inlet groove 203, inside the cylinder body 201. Mounting rods 206 are fixedly connected to both sides of the inner wall of the oil inlet groove 203, and steel balls 207 are movably connected to the outer walls of the mounting rods 206, allowing the steel balls 207 to move with the flow of hydraulic oil. A first spring 208 is sleeved on the outside of each mounting rod 206. The interiors of the first oil inlet 204 and the second oil inlet 205 are fixedly connected to the base 100. A connecting block 209 is fixedly connected to the cylinder body 201. A stop block 210 is fixedly connected inside both the first oil inlet 204 and the second oil inlet 205. The connecting blocks 209 and the stop blocks 210 on both sides are arranged in opposite directions. A piston rod 211 is movably connected inside the cylinder body 201. A support plate 212 is rotatably connected to the top of the piston rod 211. A bracket 213 is fixedly connected to the top of the base 100. A sleeve 214 is rotatably connected inside the bracket 213. A handle 215 is movably connected inside the sleeve 214. A connecting rod 216 is movably connected to the bottom of the sleeve 214. A piston block 217 is movably connected inside the pump body 200. The bottom end of the connecting rod 216 is rotatably connected to the piston block 217. A sealing cover 218 is fixedly connected to the top of the base 100. A sealing sleeve 219 is fixedly connected to the outer wall of cylinder 217, and the sealing sleeve 219 is connected to the sealing cover 218. Oil seal rings 220 are fixedly connected to the inner wall of cylinder 201 and the outer wall of piston rod 211. An auxiliary component is installed inside the sleeve 214. Pressing or lifting the handle 215 allows the handle 215 to drive the piston block 217 down or up via the connecting bracket 216. When the piston block 217 moves upward, hydraulic oil in the oil reservoir 202 is drawn into the pump body 200. Then, when the piston block 217 moves downward, hydraulic oil in the pump body 200 moves into cylinder 201 through the oil inlet groove 203, thereby causing the piston rod 211 to move upward, providing support for the object. When the piston block 217 moves upward, the lower part of the sealing cover 218 and the sealing sleeve 219... When fixed, the sealing sleeve 219 will retract accordingly, so that the sealing cover 218 and the sealing sleeve 219 can completely seal the upper end of the pump body 200, effectively preventing oil leakage from the pump body 200. Secondly, the setting of the oil seal rings 220 on both sides prevents hydraulic oil from leaking out from the contact point between the piston rod 211 and the inner wall of the cylinder 201, and prevents hydraulic oil backflow during use. This greatly improves the safety and reliability of the hydraulic jack. When the piston block 217 moves down, the hydraulic oil flows in the oil inlet groove 203. At this time, with the flow of hydraulic oil, the steel balls 207 on both sides move up. At this time, the steel ball 207 on the left side enters the interior of the left connecting block 209, thereby opening the first oil inlet 204, while the steel ball 207 on the right side moves up into the interior of the right stop block 210.The second oil inlet 205 is closed, preventing hydraulic oil from entering the oil reservoir 202. When the piston block 217 moves upward, the opening and closing states of the first oil inlet 204 and the second oil inlet 205 are switched, thus ensuring stable operation of the hydraulic jack.

[0029] A limiting ring 221 is fixedly connected to the inner wall of the pump body 200. The limiting ring 221 is located above the piston block 217, thereby preventing the piston block 217 from rising excessively.

[0030] Sealing rings 222 are fixedly connected to both sides of the top of the base 100. Both sealing rings 222 are fixedly connected to the outer walls of the pump body 200 and the cylinder body 201, thereby preventing hydraulic oil from leaking from the connection between the pump body 200, the cylinder body 201 and the base 100.

[0031] A return oil pipe 300 is fixedly connected to the top of the base 100. A switch valve 301 is fixedly connected to the outer wall of the return oil pipe 300. A return oil groove 302 is opened inside the base 100. A sealing plug 303 is movably connected inside the return oil groove 302. When the hydraulic oil needs to flow back, the switch valve 301 is opened, and the piston rod 211 slowly descends, so that the hydraulic oil below the piston rod 211 in the cylinder 201 returns to the inside of the oil storage chamber 202 through the return oil pipe 300.

[0032] The auxiliary components include mounting slots 400, with both sides of the mounting slots 400 located inside the handle 215. A second spring 401 is fixedly connected inside each mounting slot 400, and a positioning block 402 is fixedly connected to one side of each second spring 401, allowing the positioning block 402 to move within the mounting slots 400. A third spring 403 is fixedly connected inside the sleeve 214, and a push plate 404 is fixedly connected to one side of the third spring 403. Positioning holes 405 are evenly distributed on both sides of the outer wall of the sleeve 214, allowing for adjustment of the handle 215 when needed. When positioning, push the handle 215 forward to slide the positioning blocks 402 on both sides into the mounting grooves 400 on both sides. Then rotate the handle 215 to make the positioning blocks 402 on both sides abut against the inner wall of the sleeve 214. At this time, the handle 215 can be pulled back and forth, allowing the operator to freely adjust the position of the handle 215 and press the handle 215 down. After the handle 215 is moved to the appropriate position, rotate the handle 215 again to make the positioning blocks 402 on both sides re-enter the corresponding positioning holes 405. At this time, the handle 215 can be fixed and made easy for the operator to use.

[0033] A stabilizing rod 406 is fixedly connected to one side of the push plate 404. One end of the stabilizing rod 406 is located inside the sleeve 214, thereby enabling the push plate 404 to move stably.

[0034] The outer walls of the two positioning blocks 402 are inclined, and the two positioning blocks 402 are set opposite to each other, so that the positioning blocks 402 can easily slide into the mounting groove 400 without the need for manual pressing by the staff.

[0035] Working principle: Pressing or lifting the handle 215 causes the piston block 217 to move up or down via the connecting bracket 216. When the piston block 217 moves upward, it draws hydraulic oil from the oil reservoir 202 into the pump body 200. Then, when the piston block 217 moves downward, the hydraulic oil in the pump body 200 moves into the cylinder 201 through the oil inlet groove 203, thereby causing the piston rod 211 to move upward, providing support for the object. When the piston block 217 moves upward, since the lower part of the sealing cover 218 is fixed to the sealing sleeve 219, the sealing sleeve 219... 19 will retract accordingly, so that the sealing cover 218 and sealing sleeve 219 can completely seal the upper end of the pump body 200, effectively preventing oil leakage from the pump body 200. Secondly, the setting of oil seal rings 220 on both sides prevents hydraulic oil from leaking out from the contact point between the piston rod 211 and the inner wall of the cylinder 201, and prevents hydraulic oil backflow during use. This greatly improves the safety and reliability of the hydraulic jack. When the piston block 217 moves down, the hydraulic oil flows in the oil inlet groove 203. At this time, with the flow of hydraulic oil, the steel balls 207 on both sides move up. At this time, the left side Steel ball 207 enters the left connecting block 209, opening the first oil inlet 204. Meanwhile, steel ball 207 on the right moves upward to the right stop block 210, closing the second oil inlet 205, preventing hydraulic oil from entering the reservoir 202. When piston block 217 moves upward, the opening and closing states of the first and second oil inlets 204 and 205 are reversed, ensuring stable operation of the hydraulic jack. To adjust the position of handle 215, push the handle forward. 215. Slide the two side positioning blocks 402 into the two side mounting grooves 400. At this time, rotate the handle 215 so that the two side positioning blocks 402 abut against the inner wall of the sleeve 214. At this time, the handle 215 can be pulled back and forth, so that the operator can freely adjust the position of the handle 215 and make it convenient for the operator to press the handle 215 down. After the handle 215 moves to the appropriate position, rotate the handle 215 again so that the two side positioning blocks 402 re-enter the corresponding positioning holes 405. At this time, the handle 215 can be fixed and made convenient for the operator to use.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof hydraulic jack, comprising a base (100), a pump body (200), and a cylinder body (201), characterized in that: The pump body (200) is installed on the left side of the top of the base (100), and the cylinder body (201) is installed on the right side of the top of the base (100). The pump body (200) and the cylinder body (201) are provided with leak-proof components inside. The leak-proof assembly includes an oil reservoir (202) disposed inside the cylinder body (201). An oil inlet groove (203) is provided inside the base (100), and a first oil inlet (204) is provided inside the oil inlet groove (203), located inside the pump body (200). A second oil inlet (205) is provided inside the oil inlet groove (203), located inside the cylinder body (201). Inside, mounting rods (206) are connected to both sides of the inner wall of the oil inlet groove (203). Steel balls (207) are connected to the outer walls of the mounting rods (206) on both sides. A first spring (208) is provided on the outside of the mounting rods (206) on both sides. Connecting blocks (209) are connected inside the first oil inlet (204) and the second oil inlet (205). Stop blocks (210) are connected inside the first oil inlet (204) and the second oil inlet (205). 209) The cylinder body (201) is arranged in the opposite direction to the stop blocks (210) on both sides. A piston rod (211) is connected inside the cylinder body (201). A support plate (212) is connected to the top of the piston rod (211). A bracket (213) is connected to the top of the base (100). A sleeve (214) is connected inside the bracket (213). A handle (215) is connected inside the sleeve (214). A connecting rod (216) is connected to the bottom of the sleeve (214). The pump body (200) The piston block (217) is internally connected to the piston block (217), the bottom end of the connecting rod (216) is connected to the piston block (217), the top of the base (100) is connected to the sealing cap (218), the outer wall of the piston block (217) is connected to the sealing sleeve (219), the sealing sleeve (219) is connected to the sealing cap (218), the inner wall of the cylinder (201) and the outer wall of the piston rod (211) are both connected to the oil seal ring (220), and the sleeve (214) is internally provided with auxiliary components.

2. The oil-proof hydraulic jack according to claim 1, characterized in that: A limiting ring (221) is connected to the inner wall of the pump body (200), and the limiting ring (221) is located above the piston block (217).

3. The oil-proof hydraulic jack according to claim 1, characterized in that: Both sides of the top of the base (100) are connected to sealing rings (222), and both sides of the sealing rings (222) are connected to the outer walls of the pump body (200) and the cylinder body (201).

4. The oil-leakage-proof hydraulic jack according to claim 1, characterized in that: The top of the base (100) is connected to an oil return pipe (300), the outer wall of the oil return pipe (300) is connected to a switch valve (301), the inside of the base (100) is provided with an oil return groove (302), and the inside of the oil return groove (302) is provided with a sealing plug (303).

5. The oil-proof hydraulic jack according to claim 1, characterized in that: The auxiliary component includes a mounting groove (400), with the mounting grooves (400) on both sides being located inside the handle (215). A second spring (401) is connected inside the mounting grooves (400) on both sides, and a positioning block (402) is connected to one side of each of the second springs (401). A third spring (403) is connected inside the sleeve (214), and a push plate (404) is connected to one side of the third spring (403). Positioning holes (405) are evenly provided on both sides of the outer wall of the sleeve (214).

6. The oil-leakage-proof hydraulic jack according to claim 5, characterized in that: A stabilizing rod (406) is connected to one side of the push plate (404), and one end of the stabilizing rod (406) is located inside the sleeve (214).

7. The oil-leakage-proof hydraulic jack according to claim 5, characterized in that: The outer walls of the positioning blocks (402) on both sides are inclined, and the positioning blocks (402) on both sides are arranged opposite to each other.

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