Self-adaptive quick lifting jack
By using a combination of a combined oil pump and a large and small pump core in the jack, the working status of the pump core is automatically adjusted according to the bearing capacity, and the existing jack oil pump has solved the problem of complex structure and high cost, achieving efficient and fast lifting speed.
Patent Information
- Application Number
- CN202421959411.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-14
AI Technical Summary
When the existing jack oil pump automatically adjusts the bearing capacity, the structure is complex, the cost is high, and it is difficult to ensure the quality of the oil pump.
Adaptive fast lifting jack, including a combined oil pump, is adopted. Through the combined work of large and small pump cores, the working state of the pump core is automatically adjusted according to the bearing capacity, thereby adjusting the lifting speed of the jack.
The jack lifting speed is automatically adjusted according to the bearing capacity, reducing the complexity and cost of the oil pump structure, while improving the quality and lifting speed of the oil pump.
Smart Images
Figure CN223032970U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an adaptive fast-lifting jack, belonging to the technical field of jacks. Background Art
[0002] To achieve automatic adjustment of the bearing capacity of the existing jack oil pump, it is basically designed with a double-pump and double-oil circuit structure. The double-pump and double-oil circuit structure will inevitably increase the cost of the jack to a large extent due to the increase in the oil circuit and the number of parts. Moreover, with the increase in the oil circuit, the oil circuit will be more complex. Under the same processing and assembly conditions, after the oil pump is assembled, it is more difficult to ensure the quality of the oil pump. Content of the Utility Model
[0003] In order to solve the above technical problems, the utility model provides an adaptive fast-lifting jack.
[0004] The technical solution adopted by the utility model is as follows:
[0005] An adaptive fast-lifting jack includes a jack body, and the jack body includes a chassis, a tray, a lifting arm and a handle. The chassis includes two side plates, a front wheel and a rear wheel. The two side plates are arranged opposite to each other. It is characterized in that it further includes a combined oil pump. The combined oil pump includes a pump body and a large pump core and a small pump core that match the inner cavity of the pump body. The lower end of the pump body is installed in the groove of the valve body. A large pump guide sleeve is arranged in the pump body. The large pump guide sleeve is tightly arranged against the inner wall of the pump body, and the large pump core is sleeved in the large pump guide sleeve. The large pump core has a through hole penetrating the large pump core along the axial direction. A small pump guide sleeve is arranged at the lower end of the through hole, and the small pump core is sleeved in the small pump guide sleeve. A pump body screw sleeve is sleeved on the upper end of the pump body. Step surfaces are provided on the pump body screw sleeve at positions opposite to the large and small pump core guide sleeves. The upper end surfaces of the large and small pump core guide sleeves are in contact with the corresponding step surfaces respectively.
[0006] A return compression spring is arranged at the upper end of the pump body screw sleeve. A large pump core compression spring is arranged at the upper end of the large pump core. A spring seat is arranged at the top end of the small pump core, and the spring seat is sleeved on the outside of the small pump core. The bottom end of the return compression spring is fixed on the top of the pump body screw sleeve, and the top end is fixed on the spring seat. The bottom end of the large pump core compression spring is fixed on the large pump core, and the top end is fixed on the spring seat.
[0007] Further, a screw sleeve is arranged between the lower end of the small pump core and the through hole of the large pump core. A small pump Y-shaped ring and a small retaining ring are arranged between the screw sleeve and the small pump guide sleeve.
[0008] Further, a large pump Y-shaped ring and a large retaining ring are arranged between the inner side of the pump body and the outside of the large pump core.
[0009] Further, a copper gasket is provided between the bottom end of the pump body and the valve body.
[0010] Further, a wire snap ring is provided between the compression spring seat and the small pump core.
[0011] When the jack oil pump bears a large pressure, only the small pump core works. At this time, since the thrust provided by the compression spring of the large pump core to the large pump core is less than the pressure of the hydraulic oil in the pump body on the large pump core, the large pump core will not work. At this time, only the small pump core of the oil pump works, so the lifting speed of the jack is relatively slow.
[0012] When the jack oil pump bears a small pressure, both the large and small pump cores work. At this time, since the thrust provided by the compression spring of the large pump core to the large pump core is greater than the pressure of the hydraulic oil in the pump body on the large pump core, the large pump core will work. At this time, both the large and small pump cores of the oil pump work, so the lifting speed of the jack is very fast.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] 1. The present utility model can automatically adjust the working state of the pump core according to the bearing capacity of the jack, thereby automatically adjusting the lifting speed of the jack.
[0015] 2. The oil pump structure of the present utility model is relatively compact and saves space. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of the non-working state of the double pump cores of the present utility model.
[0017] Figure 2 is a schematic diagram of the working state (high-pressure state) of the small pump core of the present utility model.
[0018] Figure 3 is a schematic diagram of the working state (low-pressure state) of the large and small pump cores of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following details the specific embodiments of the embodiments of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the embodiments of the present utility model, and are not used to limit the embodiments of the present utility model.
[0020] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.
[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0023] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0025] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0026] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.
[0027] Referring to Figure 1 、 Figure 2 and Figure 3 , an adaptive fast-lifting jack of the present utility model includes a jack body. The jack body includes a chassis, a tray, a lifting arm, and a handle. The chassis includes two side plates, a front wheel, and a rear wheel. The two side plates are arranged opposite to each other. It further includes a combined oil pump. The combined oil pump includes a pump body 2 and a large pump core 3 and a small pump core 4 that match the inner cavity of the pump body 2. The lower end of the pump body 2 is installed in the groove of the valve body 1. A large pump guide sleeve 5 is arranged in the pump body 2. The large pump guide sleeve 5 is closely arranged against the inner wall of the pump body 2, and the large pump core 3 is sleeved in the large pump guide sleeve 5. The large pump core 3 has a through hole penetrating the large pump core along the axial direction. A small pump guide sleeve 6 is arranged at the lower end of the through hole, and the small pump core 4 is sleeved in the small pump guide sleeve 6; A pump body screw sleeve 7 is sleeved on the upper end of the pump body 2. The pump body screw sleeve 7 has a step surface at the position opposite to the large and small pump core guide sleeves. The upper end surfaces of the large and small pump core guide sleeves are in contact with their respective corresponding step surfaces;
[0028] A return compression spring 13 is arranged at the upper end of the pump body screw sleeve 7. A large pump core compression spring 14 is arranged at the upper end of the large pump core 3. A spring seat 15 is arranged at the top end of the small pump core 4. The spring seat 15 is sleeved on the outside of the small pump core 4; The bottom end of the return compression spring 13 is fixedly arranged on the top of the pump body screw sleeve 7, and the top end is fixedly arranged on the spring seat 15; The bottom end of the large pump core compression spring 14 is fixedly arranged on the large pump core 3, and the top end is fixedly arranged on the spring seat 15.
[0029] In one embodiment, a screw sleeve 8 is arranged between the lower end of the small pump core 4 and the through hole of the large pump core 3. A small pump Y-shaped ring 11 and a small retaining ring 12 are arranged between the screw sleeve 8 and the small pump guide sleeve 6.
[0030] In one embodiment, a large pump Y-ring 9 and a large retaining ring 10 are provided between the inner side of the pump body 2 and the outer side of the large pump core 3.
[0031] In one embodiment, a copper gasket 17 is provided between the bottom end of the pump body 2 and the valve body.
[0032] In one embodiment, a wire retaining ring 16 is provided between the compression spring seat 15 and the small pump core 4.
[0033] When the jack oil pump bears a large pressure, only the small pump core works. At this time, since the thrust provided by the large pump core compression spring to the large pump core is less than the pressure of the hydraulic oil in the pump body on the large pump core, the large pump core will not work. At this time, only the small pump core of the oil pump works, so the lifting speed of the jack is slow.
[0034] When the jack oil pump bears a small pressure, both the large and small pump cores work. At this time, since the thrust provided by the large pump core compression spring to the large pump core is greater than the pressure of the hydraulic oil in the pump body on the large pump core, the large pump core will work. At this time, both the large and small pump cores of the oil pump work, so the lifting speed of the jack is very fast.
[0035] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.
Claims
1. An adaptive fast lifting jack, comprising a jack body, the jack body comprising a base frame, a tray, a lifting arm and a handle, the base frame comprising two side panels, a front wheel and a rear wheel, the two side panels being arranged opposite to each other, characterized in that: It also includes a combined oil pump, which includes a pump body and a large pump core and a small pump core matched with the inner cavity of the pump body, the lower end of the pump body is installed in the groove of the valve body, a large pump guide sleeve is arranged in the pump body, the large pump guide sleeve is arranged closely against the inner wall of the pump body, and the large pump core is sleeved in the large pump guide sleeve, the large pump core has a through hole penetrating the large pump core along the axial direction, the lower end of the through hole is provided with a small pump guide sleeve, and the small pump core is sleeved in the small pump guide sleeve; the upper end of the pump body is sleeved with a pump body screw sleeve, the pump body screw sleeve has a step surface at a position facing the large and small pump core guide sleeves, and the upper end surfaces of the large and small pump core guide sleeves are in contact with the corresponding step surfaces; A return compression spring is arranged at the upper end of the pump body screw sleeve, a large pump core compression spring is arranged at the upper end of the large pump core, a compression spring seat is arranged at the top end of the small pump core, and the compression spring seat is sleeved on the outside of the small pump core; the bottom end of the return compression spring is fixedly arranged on the top of the pump body screw sleeve, and the top end is fixedly arranged on the compression spring seat; the bottom end of the large pump core compression spring is fixedly arranged on the large pump core, and the top end is fixedly arranged on the compression spring seat.
2. The adaptive rapid lifting jack according to claim 1, characterized in that: A screw sleeve is arranged between the lower end of the small pump core and the through hole of the large pump core, and a small pump Y-shaped ring and a small retaining ring are arranged between the screw sleeve and the small pump guide sleeve.
3. The adaptive rapid lifting jack according to claim 1, characterized in that: A large pump Y-shaped ring and a large retaining ring are arranged between the inner side of the pump body and the outer side of the large pump core.
4. The adaptive rapid lifting jack according to claim 1, characterized in that: A copper pad is arranged between the bottom end of the pump body and the valve body.
5. The adaptive rapid lifting jack according to claim 1, characterized in that: A wire retaining ring is arranged between the compression spring seat and the small pump core.