Horizontal hydraulic jack oil cylinder structure with excellent sealing effect

Abstract

The utility model discloses a horizontal hydraulic jack oil cylinder structure with an excellent sealing effect, and belongs to the technical field of jacks. Comprising an oil cylinder base, an inner cylinder sleeve, an outer cylinder sleeve, a piston rod and a top cap, the inner cylinder sleeve and the outer cylinder sleeve are fixedly installed on the oil cylinder base, the inner cylinder sleeve is sleeved with the outer cylinder sleeve, an oil storage cavity is formed by the space between the inner cylinder sleeve and the outer cylinder sleeve, one end of the piston rod extends out of the inner cylinder sleeve, and the top cap is fixedly installed on the inner cylinder sleeve and the outer cylinder sleeve. A top cap through hole is formed in the top cap, a first sealing ring and a second sealing ring are further arranged between the inner cavity wall of the top cap through hole and the piston rod, the first sealing ring is arranged at the end opening, away from the oil cylinder base, of the top cap through hole, and the second sealing ring is arranged in the middle of the top cap through hole. The oil cylinder structure has the advantages that the structure is simple, double sealing is achieved, oil in the oil cylinder structure is effectively prevented from leaking to pollute the working environment, external impurities can be effectively prevented from entering the oil cylinder structure, the piston rod and the second sealing ring are protected, and the reliability of working operation is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of jacks, and in particular relates to a horizontal hydraulic jack oil cylinder structure with excellent sealing effect. Background Art

[0002] With the rapid development of my country's economy and society, people's living standards have been steadily improved. Motor vehicles such as passenger cars and commercial vehicles have been widely used as daily commuting or cargo transportation tools. When a vehicle encounters an accident, human negligence, force majeure or internal mechanical damage, it must be repaired. Especially for various motor multi-wheeled vehicles with extremely large mass, it is necessary to use a jack device that can be easily operated by humans to lift the vehicle for easy repair. The above-mentioned horizontal jack is a jack device widely used in load-bearing vehicles or mobile equipment to support the weight of the equipment and adjust the level of the equipment. It is mainly used in factories, mines, transportation and other departments for vehicle repair and other lifting, support and other work. For example, when replacing a vehicle tire, a horizontal jack can be used to separate the tire from the ground before the tire can be replaced. Its structure is light and strong, flexible and reliable, and can be carried and operated by one person, with a wide range of applications. The existing horizontal hydraulic jack mainly includes a frame component, a hydraulic cylinder component, a lifting arm component, a bracket component, a click handle and a connecting rod. The frame component includes a left wall panel and a right wall panel arranged parallel to each other. The left wall panel and the right wall panel are assembled by bolts and nuts to form a detachable connection. The lifting arm component is sleeved in the middle of the left and right wall panels, and the bracket component is installed at the front end of the lifting arm component. There is a pair of connecting rods and they are respectively located on the left and right wall panel sides. One end of the connecting rod is pivotally connected to the corresponding left wall panel or right wall panel, and the other end of the connecting rod is pivotally connected to the bracket of the lifting arm component. When the horizontal hydraulic jack is lifted, the click handle is repeatedly pressed down, and the hydraulic cylinder component pushes the lifting arm component upward, and finally the bracket component on the lifting arm component lifts the heavy object. However, the hydraulic cylinder components on existing horizontal hydraulic jacks often have the problem of poor internal sealing effect. The internal oil and component lubricating grease are easy to leak out, polluting the working environment and causing inconvenience in use. In addition, some external impurities such as dust, garbage, water, mud, coal powder, etc. are easy to enter the interior of the hydraulic cylinder components, causing damage to components such as the piston rod and oil pump inside the hydraulic cylinder components, resulting in poor reliability of working operation and a poor user experience.

[0003] In view of the above situation, it is necessary to reasonably improve the existing horizontal hydraulic jack cylinder structure to enhance its sealing effect. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The task of the utility model is to provide a horizontal hydraulic jack cylinder structure with a compact structure, good improvement effect and low production cost and excellent sealing effect. By adding a first sealing ring, double sealing of the cylinder structure is achieved, thereby effectively preventing oil leakage from polluting the working environment and blocking external impurities from entering the cylinder structure, thereby ensuring the stability of working operation and improving service life.

[0005] The task of the utility model is accomplished in this way. A horizontal hydraulic jack cylinder structure with excellent sealing effect includes a cylinder seat, an inner cylinder sleeve, an outer cylinder sleeve, a piston rod and a top cap. One end of the inner cylinder sleeve in the length direction is fixedly installed on the cylinder seat. The inner cylinder sleeve is hollow and forms an inner cylinder sleeve hollow cavity. One end of the outer cylinder sleeve in the length direction is also fixedly installed on the cylinder seat, and the outer cylinder sleeve is sleeved outside the inner cylinder sleeve, and the space between the inner cylinder sleeve and the outer cylinder sleeve constitutes an oil storage cavity. The piston rod is inserted into the inner cylinder sleeve hollow cavity, and one end of the piston rod in the length direction away from the cylinder seat protrudes out of the inner cylinder sleeve. , and the top cap is fixedly mounted on one end of the inner cylinder sleeve in the length direction away from the cylinder seat and on one end of the outer cylinder sleeve in the length direction away from the cylinder seat, so as to achieve the fixation of the inner cylinder sleeve and the outer cylinder sleeve and the closure of the oil storage chamber away from the cylinder seat, and a top cap through hole is formed in the top cap, and the piston rod passes through the top cap through hole and achieves sliding cooperation with the top cap through hole; the characteristic is that: a first sealing ring I and a second sealing ring II are also arranged between the inner cavity wall of the top cap through hole and the piston rod, the first sealing ring I is arranged at the end opening of the top cap through hole away from the cylinder seat, and the second sealing ring II is arranged at the middle position of the top cap through hole.

[0006] In a specific embodiment of the present invention, a lip is provided on the first sealing ring I, and the lip is fitted on the outer circumferential surface of the piston rod; the lip is obliquely extended outward from the edge of the ring body of the first sealing ring I, and a piston rod frustum section is correspondingly formed on the piston rod, and the inner surface of the lip is fitted on the part of the piston rod frustum section close to the piston rod body.

[0007] In another specific embodiment of the utility model, a second sealing ring accommodating groove II is provided on the inner hole wall of the top cap through hole of the top cap and at the axial middle portion corresponding to the top cap through hole. The second sealing ring accommodating groove II is annular in shape and extends in the circumferential direction around the top cap through hole, and the second sealing ring II is cooperatively installed in the second sealing ring accommodating groove II.

[0008] In another specific embodiment of the present invention, a first sealing ring accommodating groove I is provided on the inner hole wall of the top cap through hole of the top cap and at the end position corresponding to the top cap through hole axially away from the cylinder seat. The first sealing ring accommodating groove I is also annular in shape and extends around the circumferential direction of the top cap through hole. The first sealing ring I is fitted in the first sealing ring accommodating groove I, and the lip on the first sealing ring I protrudes out of the first sealing ring accommodating groove I and fits with the outer circumferential surface of the piston rod.

[0009] In another specific embodiment of the utility model, a circle of top cap positioning collar is formed on the top cap, and the top cap positioning collar is installed at the opening end of the oil storage cavity away from the cylinder seat, so as to achieve sealing for the end of the oil storage cavity.

[0010] In another specific embodiment of the utility model, an internal thread section of a top cap positioning collar portion is formed on the inner circumferential wall of the top cap positioning collar portion, and an external thread section of an inner cylinder sleeve is also provided on the outer circumferential wall of the inner cylinder sleeve and at a position corresponding to the internal thread section of the top cap positioning collar portion. The internal thread section of the top cap positioning collar portion and the external thread section of the inner cylinder sleeve are threadedly matched and installed with each other, so that the top cap and the inner cylinder sleeve are fixedly connected together.

[0011] In another specific embodiment of the present invention, a top cap outer matching groove is recessed on the outer peripheral edge of the top cap, and the top cap outer matching groove is annular in shape. The shape of the top cap outer matching groove is adapted to the shape of the end portion of the outer cylinder sleeve axially away from the cylinder seat, and the end portion of the outer cylinder sleeve axially away from the cylinder seat is fitted and mounted on the top cap outer matching groove and fixedly connected to the top cap body, thereby realizing the positioning connection between the outer cylinder sleeve and the top cap.

[0012] In a further specific embodiment of the present invention, a top cap outer sealing ring is further provided between the top cap outer matching groove and the outer cylinder sleeve. The top cap outer sealing ring is constructed in the shape of an annular ring body and is preferably an O-ring. The top cap outer sealing ring is embedded on the outer peripheral surface of the top cap outer matching groove and the top cap outer sealing ring is in contact with an end portion of the outer cylinder sleeve axially away from the cylinder seat.

[0013] In yet another specific embodiment of the present invention, the lip is an arc-shaped ring body, and the thickness of the outer edge of the lip gradually decreases along its extending direction.

[0014] In yet another specific embodiment of the present invention, the material of the first sealing ring I is a wear-resistant elastomer material.

[0015] The beneficial effects of the utility model are as follows: the technical scheme optimizes the structure and adds a first sealing ring I with a lip, first seals the oil cylinder structure through the second sealing ring II to prevent the oil in the oil cylinder structure from leaking out, and performs a second sealing through the first sealing ring I to prevent the oil from leaking out and polluting the working environment, thereby achieving a double sealing effect, and the inclined lip effectively blocks foreign matter such as dust, garbage, water, mud, coal powder and other impurities from invading the interior of the horizontal hydraulic jack cylinder structure, thereby protecting the piston rod and the second sealing ring II and ensuring the reliability of the horizontal jack's operation, and at the same time, the contact surface between the lip and the piston rod is an inclined surface, the lip can always fit the contact surface to ensure the sealing effect, and can effectively reduce the friction resistance between the lip contact surface and the piston rod, and further reduce the risk of oil leakage, ensure the tightness of the seal, and improve the service life; in addition, the technical scheme makes few changes to the original structure, achieves the optimization of the sealing effect, and can make full use of the original production line for production, and at the same time, the production cost is low, which has significant promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the plan structure of an embodiment of the utility model.

[0017] In the figure: 1. cylinder seat; 2. inner cylinder sleeve, 21. inner cylinder sleeve hollow cavity, 22. inner cylinder sleeve external thread section; 3. outer cylinder sleeve; 4. piston rod, 41. piston rod frustum section; 5. top cap, 51. top cap through hole, 511. second sealing ring accommodating groove II, 512. first sealing ring accommodating groove I, 52. top cap positioning collar part, 521. top cap positioning collar part internal thread section, 522. top cap outer sealing ring, 53. top cap outer matching groove; 6. oil storage cavity; 7. first sealing ring I, 71. lip; 8. second sealing ring II II. DETAILED DESCRIPTION

[0018] The following will be described in detail in the form of embodiments, but the description of the embodiments is not a limitation of the scheme of the utility model. Any equivalent changes made based on the concept of the utility model that are merely formal but not substantial should be regarded as within the scope of the technical scheme of the utility model.

[0019] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are for the current Figure 1 It refers to the position state, and therefore cannot be understood as a special limitation of the technical solution provided by the utility model.

[0020] See also Figure 1, shows a horizontal hydraulic jack cylinder structure with excellent sealing effect, including a cylinder seat 1, an inner cylinder sleeve 2, an outer cylinder sleeve 3, a piston rod 4 and a top cap 5; wherein the right end of the inner cylinder sleeve 2 is fixedly mounted on the cylinder seat 1, the inner cylinder sleeve 2 is hollow inside and forms a hollow cavity 21 of the inner cylinder sleeve that runs through its left and right ends, the right end of the outer cylinder sleeve 3 is also fixedly mounted on the cylinder seat 1, and the outer cylinder sleeve 3 is sleeved outside the inner cylinder sleeve 2, and the space between the inner cylinder sleeve 2 and the outer cylinder sleeve 3 constitutes an oil storage cavity 6, the The oil storage chamber 6 corresponds to the space between the outer peripheral side wall of the inner cylinder liner 2 and the inner peripheral side wall of the aforementioned outer cylinder liner 3. The aforementioned piston rod 4 is inserted into the hollow cavity 21 of the inner cylinder liner, and the left end of the piston rod 4 protrudes out of the aforementioned inner cylinder liner 2, and the aforementioned top cap 5 is fixedly installed on the left end of the aforementioned inner cylinder liner 2 and the left end of the outer cylinder liner 3, thereby realizing the fixation of the inner cylinder liner 2 and the outer cylinder liner 3 and the closure of the left end of the aforementioned oil storage chamber 6, and a top cap through hole 51 is formed in the top cap 5, and the aforementioned piston rod 4 passes through the top cap through hole 51 and realizes sliding cooperation with the top cap through hole 51.

[0021] As the technical key points of the technical solution provided by the utility model: a first sealing ring I7 and a second sealing ring II8 are also arranged between the inner cavity wall of the aforementioned top cap through hole 51 and the piston rod 4, the aforementioned first sealing ring I7 is arranged at the left end opening of the aforementioned top cap through hole 51, and the aforementioned second sealing ring II8 is arranged at the middle position of the aforementioned top cap through hole 51, and the second sealing ring II8 is preferably an O-ring.

[0022] In this embodiment, a lip 71 is provided on the aforementioned first sealing ring I7, and the lip 71 is fitted on the outer circumferential surface of the aforementioned piston rod 4; the aforementioned lip 71 is extended outwardly from the edge of the ring body of the first sealing ring I7, and a piston rod frustum section 41 is correspondingly formed on the aforementioned piston rod 4, and the inner surface of the aforementioned lip 71 is fitted on the portion of the piston rod frustum section 41 close to the rod body of the piston rod 4; and the aforementioned lip 71 is an annular ring body structure, and the outer edge of the lip 71 gradually decreases in thickness along its extension direction, and the lip 71 is in close contact with the piston rod frustum section 41 of the piston rod 4, thereby effectively reducing the risk of oil leakage in the horizontal hydraulic jack cylinder structure, and more importantly, the lip 71 arranged obliquely outward can also effectively block external impurities from entering the interior of the cylinder structure, and effectively protect the second sealing ring II II 8 and the piston rod 4.

[0023] In this embodiment, a second sealing ring accommodating groove Ⅱ511 is further provided on the inner hole wall of the top cap through hole 51 of the aforementioned top cap 5 and at the axial middle part corresponding to the top cap through hole 51. The second sealing ring Ⅱ accommodating groove Ⅱ511 is annular in shape and extends in the circumferential direction around the aforementioned top cap through hole 51, and the aforementioned second sealing ring Ⅱ8 is cooperatedly installed in the second sealing ring accommodating groove Ⅱ511, and the second sealing ring Ⅱ8 is fitted on the outer peripheral surface of the rod body of the aforementioned piston rod 4, thereby realizing a primary sealing of the horizontal hydraulic jack cylinder structure to prevent leakage of the internal oil of the horizontal hydraulic jack cylinder structure.

[0024] In the present embodiment, a first sealing ring accommodating groove Ⅰ512 is further provided on the inner hole wall of the top cap through hole 51 of the aforementioned top cap 5 and at the end position corresponding to the top cap through hole 51 axially away from the aforementioned cylinder seat 1. The first sealing ring accommodating groove Ⅰ512 is also annular in shape and extends in the circumferential direction around the aforementioned top cap through hole 51. The aforementioned first sealing ring Ⅰ7 is cooperatively installed in the first sealing ring accommodating groove Ⅰ512. The aforementioned first sealing ring Ⅰ7 and the lip 71 on the first sealing ring Ⅰ7 can realize secondary sealing for the horizontal hydraulic jack cylinder structure, prevent the oil leaked from the second sealing ring Ⅱ8 structure from leaking to the outside of the inner cylinder sleeve 2, and further prevent the leakage of grease from polluting the working environment. At the same time, the lip 7 can fit tightly on the rod body of the piston rod 4 to ensure the sealing effect.

[0025] Furthermore, a circle of top cap positioning collar portion 52 is formed on the aforementioned top cap 5, and the aforementioned top cap positioning collar portion 52 is installed in cooperation at the opening end of the aforementioned oil storage chamber 6 away from the aforementioned cylinder seat 1, thereby achieving sealing for the end of the oil storage chamber 6.

[0026] Furthermore, a top cap positioning collar internal thread section 521 is formed on the inner circumferential wall of the aforementioned top cap positioning collar portion 52, and an inner cylinder sleeve external thread section 22 is also provided on the outer circumferential wall of the aforementioned inner cylinder sleeve 2 and at a position corresponding to the top cap positioning collar internal thread section 521. The aforementioned top cap positioning collar internal thread section 521 and the inner cylinder sleeve external thread section 22 are threadedly matched and installed, so that the aforementioned top cap 5 is fixedly connected to the aforementioned inner cylinder sleeve 2.

[0027] Please continue to see Figure 1 A top cap outer matching groove 53 is formed on the outer peripheral edge of the top cap 5. The top cap outer matching groove 53 is annular in shape. The shape of the top cap outer matching groove 53 is compatible with the shape of the left end of the outer cylinder sleeve 3. The left end of the outer cylinder sleeve 3 is mounted on the top cap outer matching groove 53 and fixedly connected with the top cap 5 body, thereby realizing the positioning connection between the outer cylinder sleeve 3 and the top cap 5.

[0028] Furthermore, a top cap outer sealing ring 522 is provided between the aforementioned top cap outer matching groove 53 and the outer cylinder sleeve 3. The top cap outer sealing ring 522 is constructed in the shape of an annular ring body and is preferably an O-ring. The top cap outer sealing ring 522 is embedded in the outer peripheral surface of the aforementioned top cap outer matching groove 53 and the top cap outer sealing ring 522 is in contact with the end portion of the aforementioned outer cylinder sleeve 3 axially away from the cylinder seat 1.

[0029] Preferably, the material of the aforementioned first sealing ring Ⅰ7 is a wear-resistant elastomeric material and is preferably fluororubber, which has the advantages of high temperature resistance and corrosion resistance, and can ensure the sealing reliability of the cylinder structure for long-term operation and extend its service life.

[0030] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0031] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the utility model task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A horizontal hydraulic jack cylinder structure with excellent sealing effect, comprising a cylinder seat (1), an inner cylinder sleeve (2), an outer cylinder sleeve (3), a piston rod (4) and a top cap (5), wherein one end of the inner cylinder sleeve (2) in the length direction is fixedly mounted on the cylinder seat (1), the inner cylinder sleeve (2) is hollow inside and forms an inner cylinder sleeve hollow cavity (21), one end of the outer cylinder sleeve (3) in the length direction is also fixedly mounted on the cylinder seat (1), and the outer cylinder sleeve (3) is sleeved outside the inner cylinder sleeve (2), and the space between the inner cylinder sleeve (2) and the outer cylinder sleeve (3) forms an oil storage cavity (6), and the piston rod (4) is inserted into the inner cylinder sleeve (2) and the outer cylinder sleeve (3) is provided with a plurality of piston rods (4). The piston rod (4) is disposed in the hollow cavity (21) of the cylinder sleeve, and one end of the piston rod (4) in the length direction away from the cylinder seat (1) protrudes out of the inner cylinder sleeve (2), and the top cap (5) is fixedly mounted on one end of the inner cylinder sleeve (2) in the length direction away from the cylinder seat (1) and one end of the outer cylinder sleeve (3) in the length direction away from the cylinder seat (1), thereby achieving the fixation of the inner cylinder sleeve (2) and the outer cylinder sleeve (3) and the closure of the oil storage cavity (6) away from the cylinder seat (1), and a top cap through hole (51) is formed in the top cap (5), and the piston rod (4) passes through the top cap through hole (51) and achieves sliding fit with the top cap through hole (51); it is characterized in that: A first sealing ring I (7) and a second sealing ring II (8) are also provided between the inner wall of the top cap through hole (51) and the piston rod (4), wherein the first sealing ring I (7) is provided at the end opening of the top cap through hole (51) away from the cylinder seat (1), and the second sealing ring II (8) is provided at the middle position of the top cap through hole (51).

2. According to claim 1, a horizontal hydraulic jack cylinder structure with excellent sealing effect is characterized in that: A lip (71) is provided on the first sealing ring I (7), and the lip (71) is fitted on the outer circumferential surface of the piston rod (4); the lip (71) is extended outwardly from the edge of the ring body of the first sealing ring I (7), and a piston rod frustum section (41) is correspondingly formed on the piston rod (4), and the inner surface of the lip (71) is fitted on the portion of the piston rod frustum section (41) close to the rod body of the piston rod (4).

3. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 1 is characterized in that: A second sealing ring accommodating groove II (511) is provided on the inner hole wall of the top cap through hole (51) of the top cap (5) and at a position corresponding to the axial middle portion of the top cap through hole (51). The second sealing ring accommodating groove II (511) is annular in shape and extends in the circumferential direction around the top cap through hole (51), and the second sealing ring II (8) is cooperatively installed in the second sealing ring accommodating groove II (511).

4. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 2 is characterized in that: A first sealing ring accommodating groove (512) is also provided on the inner hole wall of the top cap through hole (51) of the top cap (5) and at a position corresponding to an end portion of the top cap through hole (51) axially away from the cylinder seat (1). The first sealing ring accommodating groove (512) is also annular in shape and extends in the circumferential direction around the top cap through hole (51). The first sealing ring I (7) is mounted in the first sealing ring accommodating groove (512), and the lip (71) on the first sealing ring I (7) protrudes out of the first sealing ring accommodating groove (512) and fits with the outer peripheral surface of the piston rod (4).

5. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 1 is characterized in that: A circle of top cap positioning collar (52) is also formed on the top cap (5), and the top cap positioning collar (52) is mounted at the open end of the oil storage chamber (6) away from the cylinder seat (1), thereby achieving sealing of the end of the oil storage chamber (6).

6. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 5 is characterized in that: An internal thread section (521) of a top cap positioning collar portion is formed on the inner peripheral wall of the top cap positioning collar portion (52), and an internal cylinder sleeve external thread section (22) is also provided on the outer peripheral wall of the inner cylinder sleeve (2) at a position corresponding to the internal thread section (521) of the top cap positioning collar portion. The internal thread section (521) of the top cap positioning collar portion and the external thread section (22) of the inner cylinder sleeve are threadably matched and installed with each other, so that the top cap (5) and the inner cylinder sleeve (2) are fixedly connected together.

7. A horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 6, characterized in that: A top cap outer matching groove (53) is also formed on the outer peripheral edge of the top cap (5). The top cap outer matching groove (53) is annular in shape. The shape of the top cap outer matching groove (53) matches the shape of the end portion of the outer cylinder sleeve (3) axially away from the cylinder seat (1). The end portion of the outer cylinder sleeve (3) axially away from the cylinder seat (1) is mounted on the top cap outer matching groove (53) and is fixedly connected to the top cap (5) body, thereby realizing the positioning connection between the outer cylinder sleeve (3) and the top cap (5).

8. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 7 is characterized in that: A top cap outer sealing ring (522) is also provided between the top cap outer matching groove (53) and the outer cylinder sleeve (3). The top cap outer sealing ring (522) is in the shape of an annular ring and is preferably an O-ring. The top cap outer sealing ring (522) is embedded in the outer peripheral surface of the top cap outer matching groove (53) and fits with the end portion of the outer cylinder sleeve (3) axially away from the cylinder seat (1).

9. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 2 is characterized in that: The lip (71) is an arc-shaped ring body, and the thickness of the outer edge of the lip (71) gradually decreases along its extension direction.

10. The horizontal hydraulic jack cylinder structure with excellent sealing effect according to claim 1, characterized in that: The material of the first sealing ring I (7) is a wear-resistant elastomer material.

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