CN216618054U - Hydraulic lifting device with oil tank non-return back pressure valve - Google Patents
Hydraulic lifting device with oil tank non-return back pressure valve Download PDFInfo
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- CN216618054U CN216618054U CN202122828107.3U CN202122828107U CN216618054U CN 216618054 U CN216618054 U CN 216618054U CN 202122828107 U CN202122828107 U CN 202122828107U CN 216618054 U CN216618054 U CN 216618054U
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Abstract
The utility model relates to the field of hydraulic lifting devices, and discloses a hydraulic lifting device with an oil tank back pressure check valve, which comprises an oil tank and a manual pump, wherein the manual pump is provided with the oil tank, the oil tank is filled with oil, the oil tank back pressure check valve is arranged between the manual pump and the oil, the oil tank back pressure check valve comprises an elastic reed, a tray and a sealing ring, the elastic reed is connected with the tray, and the tray is provided with the sealing ring; the manual pump comprises a pump body, the pump body is in contact with the sealing ring, and the pump body is connected with the elastic reed. The elastic reed, the tray, the sealing ring and the pump body are tightly attached to form a sealing ring, an oil return pipeline is arranged inside the sealing ring, and oil is arranged outside the sealing ring. The utility model has the advantages of one-way circulation of oil, prevention of the oil of the polluted oil tank from entering an oil return pipeline of the system and reduction of the fault rate of the system.
Description
Technical Field
The utility model relates to the field of hydraulic lifting devices, in particular to a hydraulic lifting device with an oil tank non-return back pressure valve.
Background
In a hydraulic lifting system of a cab of a commercial vehicle, a manual pump is generally used for providing a hydraulic power source for the system, and an oil tank is arranged on the manual pump and serves as an oil storage space. An oil return pipeline of the hydraulic lifting system of the cab of the commercial vehicle is directly communicated with the inside of the oil tank, so that oil can conveniently flow back. Utility model patent application number CN202022680955.X discloses a heavy truck driver's cabin upset system lifts hydraulic pressure hand pump.
But because the fluid in the oil tank uses for a long time, often can carry various tiny impurity and granule, if this fluid directly gets into hydraulic system through returning oil pipe way, will cause the interior fluid pollution of system, arouse easily that the system is inefficacious.
And when the system is used for the first time, the executive component and the pipeline in the hydraulic system are filled with oil, if the system is not used for a long time, the oil in the system can flow back into the oil tank under the reasons of gravity or vehicle bump and the like, so that the pipeline of the hydraulic system sucks air, and the problems are caused as follows: the next time of use can not build pressure quickly, the lifting cylinder slides down automatically, and the internal parts are damaged due to lack of lubrication. The existing structure is direct oil return, no special measures are taken, and the probability of related faults caused by the reasons of the hydraulic lifting system of the cab of the commercial vehicle is always high.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a hydraulic lifting device with an oil tank check back pressure valve.
In order to solve the technical problem, the utility model is solved by the following technical scheme:
a hydraulic lifting device with an oil tank back pressure check valve comprises an oil tank and a manual pump, wherein the manual pump is provided with the oil tank, the oil tank is filled with oil, the oil tank back pressure check valve is arranged between the manual pump and the oil, the oil tank back pressure check valve comprises an elastic reed, a tray and a sealing ring, the elastic reed is connected with the tray, and the tray is provided with the sealing ring; the manual pump comprises a pump body, the pump body is in contact with the sealing ring, and the pump body is connected with the elastic reed.
Preferably, the elastic reed, the tray, the sealing ring and the pump body are tightly attached to form a sealing ring, an oil return pipeline is arranged inside the sealing ring, and oil is arranged outside the sealing ring.
Preferably, the elastic reed is provided with a first mounting hole, the tray is provided with a bulge, and the bulge is mounted in the first mounting hole; the tray is also provided with a groove and an oil passing groove, the groove is internally provided with a sealing ring, and the oil passing groove is opposite to the oil return pipeline. The tray and the elastic spring leaf are connected through the bulge and the first mounting hole, and the structure is stable.
Preferably, the oil tank back pressure check valve further comprises a first rivet and a second rivet, a second mounting hole and a third mounting hole are further formed in the two sides of the elastic reed, which are located in the first mounting hole, the first rivet penetrates through the second mounting hole and then is riveted with the pump body, and the second rivet penetrates through the third mounting hole and then is riveted with the pump body. Install oil tank non return back pressure valve on the pump body through first rivet and second rivet, stable in structure.
Preferably, the elastic spring piece comprises a first bending section, an elastic section and a second bending section, the first bending section is connected with the second bending section through the elastic section, a second mounting hole is formed in the first bending section, a first mounting hole is formed in the elastic section, and a third mounting hole is formed in the second bending section. The combination of the first bending section, the elastic section and the second bending section provides the spring reed with proper elasticity.
Preferably, the elastic spring is made of metal, the sealing ring is made of nitrile rubber, the sealing ring is an O-shaped sealing ring, and the tray is made of nylon materials. The elastic reed is a metal sheet and can be produced in large batch by using a stamping die; the tray is the nylon material, and the sealing washer is butadiene acrylonitrile rubber, all can pass through the rubber and plastic, and mould mass production, and the part uniformity is fabulous.
Preferably, when the pressure in the oil return pipeline is greater than the elastic force of the elastic reed, the sealing ring is separated from the pump body, and the oil in the oil return pipeline flows into the oil tank; when the pressure in the oil return pipeline is less than or equal to the elastic force of the elastic reed, the sealing ring returns to be in contact with the pump body again to form sealing. The oil liquid flows in a single direction, the oil liquid in the oil return pipeline of the system can enter the oil tank, and the oil liquid in the oil tank cannot enter the oil return pipeline.
Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that:
1. the oil liquid flows in a single direction, the oil in the oil return pipeline of the system can enter the oil tank, and the oil liquid in the oil tank cannot enter the oil return pipeline; therefore, the polluted oil in the oil tank cannot enter an oil return pipeline of the system, and the condition of system failure is avoided.
2. The oil return system has certain opening pressure, and oil in the oil return pipeline of the system cannot return to an oil tank under the action of self gravity, so that air is prevented from being sucked into the pipeline of the hydraulic system, the stability of the system is maintained, and the fault rate of the system is reduced.
3. The manufacturing is simple, the main parts are an elastic reed, a tray and a sealing ring, the elastic reed is a metal sheet, and the large-scale production can be realized by using a stamping die; the tray is the nylon material, and the sealing washer is butadiene acrylonitrile rubber, all can pass through the rubber and plastic, and mould mass production, and the part uniformity is fabulous.
4. The assembly is simple, and after the parts are combined, the assembly can be completed only by riveting the rivet into the pump body.
5. The sealing performance is strong, and the O-shaped sealing ring made of the nitrile rubber material is used as a sealing element, so that the sealing device has good sealing performance and strong pollution resistance, is not easily influenced by impurity particles in oil, and destroys the sealing effect.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of a check back pressure valve of a fuel tank.
Fig. 3 is a left side view of the spring reed of fig. 2.
Fig. 4 is a schematic view of the structure of the tray of fig. 2.
Fig. 5 is a left side view of the tray of fig. 4.
The names of the parts indicated by the numerical references in the above figures are as follows: the oil pump comprises a manual pump 1, a pump body 101, an oil tank 2, oil 201, 3 oil tank check back pressure valves, an elastic reed 301, a 3011 first bending section, a 3012 elastic section, a 3013 second bending section, a 3014 second mounting hole, a 3015 first mounting hole, a 3016 third mounting hole, a 302 tray, a 3021 bulge, a 3022 groove, a 3023 oil passing groove, a 303 sealing ring, a 3041 first rivet, a 3042 second rivet and a 4 oil return pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A hydraulic lifting device with an oil tank check back pressure valve comprises an oil tank 2 and a manual pump 1, wherein the manual pump 1 is provided with the oil tank 2, the oil tank 2 is filled with oil 201, an oil tank check back pressure valve 3 is arranged between the manual pump 1 and the oil 201, the oil tank check back pressure valve 3 comprises an elastic reed 301, a tray 302 and a sealing ring 303, the elastic reed 301 is connected with the tray 302, and the tray 302 is provided with the sealing ring 303; the manual pump 1 includes a pump body 101, the pump body 101 is in contact with a seal ring 303, and the pump body 101 is connected to a spring reed 301.
The elastic reed 301, the tray 302, the sealing ring 303 and the pump body 101 are tightly attached to form a sealing ring, the oil return pipeline 4 is arranged inside the sealing ring, and oil 201 is arranged outside the sealing ring.
The elastic reed 301 is provided with a first mounting hole 3015, the tray 302 is provided with a protrusion 3021, and the protrusion 3021 is mounted in the first mounting hole 3015; the tray 302 is also provided with a groove 3022 and an oil passing groove 3023, the groove 3022 is internally provided with a sealing ring 303, and the oil passing groove 3023 is opposite to the oil return pipeline 4. The tray 302 and the spring reed 301 are connected through the protrusions 3021 and the first mounting holes 3015, and the structure is stable.
The oil tank check back pressure valve 3 further comprises a first rivet 3041 and a second rivet 3042, a second mounting hole 3014 and a third mounting hole 3016 are further arranged on the elastic reed 301 and located on two sides of the first mounting hole 3015, the first rivet 3041 penetrates through the second mounting hole 3014 and is riveted with the pump body 101, and the second rivet 3042 penetrates through the third mounting hole 3016 and is riveted with the pump body 101. The oil tank check back pressure valve 3 is mounted on the pump body 101 through the first rivet 3041 and the second rivet 3042, and the structure is stable.
The elastic reed 301 includes a first bending section 3011, an elastic section 3012 and a second bending section 3013, the first bending section 3011 is connected to the second bending section 3013 through the elastic section 3012, a second mounting hole 3014 is arranged on the first bending section 3011, the elastic section 3012 is provided with a first mounting hole 3015, and the second bending section 3013 is provided with a third mounting hole 3016. The combination of first bending section 3011, elastic section 3012 and second bending section 3013 provides spring reed 301 with suitable elasticity.
The elastic reed 301 is an elastic reed 301 made of metal, the sealing ring 303 is a sealing ring 303 made of nitrile rubber, the sealing ring 303 is an O-shaped sealing ring, and the tray 302 is a tray 302 made of nylon material. The elastic reed 301 is a metal sheet and can be produced in large batch by using a stamping die; tray 302 is the nylon material, and sealing washer 303 is butadiene acrylonitrile rubber, all can pass through the rubber and plastic, mould mass production, and the part uniformity is fabulous.
When the pressure in the oil return pipeline 4 is greater than the elastic force of the elastic reed 301, the sealing ring 303 is separated from the pump body 101, and the oil in the oil return pipeline 4 flows into the oil tank 2; when the pressure in the oil return pipeline 4 is less than or equal to the elastic force of the elastic reed 301, the sealing ring 303 returns to the original position and is restored to contact with the pump body 101, and sealing is formed. The oil liquid flows in a single direction, the oil liquid in the oil return pipeline 4 of the system can enter the oil tank, and the oil liquid in the oil tank 2 cannot enter the oil return pipeline.
The working principle is as follows:
when the seal ring 303 is in contact with the pump body 101 to form a sealed state, the oil 201 in the oil tank 2 cannot push the tray 302 and the seal ring 303 open by the action of the spring reed 301, so that the oil 201 in the oil tank 2 cannot enter the return line 4, and this structure has a check function.
Because the elastic reed 301 has proper elastic force, the oil in the oil return pipeline 4 cannot push the tray 302 and the sealing ring 303 to flow back into the oil tank 2 under the action of gravity, and the structure has a certain back pressure effect.
When the lifting system works, the internal pressure of the oil return pipeline 4 is gradually increased under the oil return effect of the system, when the force applied to the tray 302 is greater than the elastic force of the elastic reed 301, the tray 302 is opened leftwards, the sealing ring 303 is separated from the contact with the pump body 101, oil in the oil return pipeline 4 flows into the oil tank 2, and the oil circuit of the system is communicated.
When the lifting system stops working, the pressure in the oil return pipeline 4 is reduced, the tray 302 returns under the action of the elastic reed 301, the sealing ring 303 returns to be in contact with the pump body 101 again to form sealing, and oil does not flow freely any more.
Therefore, the application has the following advantages:
1. the oil liquid flows in a single direction, the oil in the oil return pipeline of the system can enter the oil tank, and the oil liquid in the oil tank cannot enter the oil return pipeline; therefore, the polluted oil in the oil tank cannot enter an oil return pipeline of the system, and the condition of system failure is avoided.
2. The oil return system has certain opening pressure, and oil in the oil return pipeline of the system cannot return to an oil tank under the action of self gravity, so that air is prevented from being sucked into the pipeline of the hydraulic system, the stability of the system is maintained, and the fault rate of the system is reduced.
3. The manufacturing is simple, the main parts are an elastic reed, a tray and a sealing ring, the elastic reed is a metal sheet, and the large-scale production can be realized by using a stamping die; the tray is the nylon material, and the sealing washer is butadiene acrylonitrile rubber, all can pass through the rubber and plastic, and mould mass production, and the part uniformity is fabulous.
4. The assembly is simple, and after the parts are combined, the assembly can be completed only by riveting the rivet into the pump body.
5. The sealing performance is strong, and the O-shaped sealing ring made of the nitrile rubber material is used as a sealing element, so that the sealing device has good sealing performance and strong pollution resistance, is not easily influenced by impurity particles in oil, and destroys the sealing effect.
Example 2
A hydraulic lifting device with an oil tank check back pressure valve comprises an oil tank 2 and a manual pump 1, wherein the manual pump 1 is provided with the oil tank 2, the oil tank 2 is filled with oil 201, an oil tank check back pressure valve 3 is arranged between the manual pump 1 and the oil 201, the oil tank check back pressure valve 3 comprises an elastic reed 301, a tray 302 and a sealing ring 303, the elastic reed 301 is connected with the tray 302, and the tray 302 is provided with the sealing ring 303; the manual pump 1 includes a pump body 101, the pump body 101 is in contact with a seal ring 303, and the pump body 101 is connected to a spring reed 301.
The elastic reed 301, the tray 302, the sealing ring 303 and the pump body 101 are tightly attached to form a sealing ring, the oil return pipeline 4 is arranged inside the sealing ring, and oil 201 is arranged outside the sealing ring.
Example 3
A hydraulic lifting device with an oil tank check back pressure valve comprises an oil tank 2 and a manual pump 1, wherein the manual pump 1 is provided with the oil tank 2, the oil tank 2 is filled with oil 201, an oil tank check back pressure valve 3 is arranged between the manual pump 1 and the oil 201, the oil tank check back pressure valve 3 comprises an elastic reed 301, a tray 302 and a sealing ring 303, the elastic reed 301 is connected with the tray 302, and the tray 302 is provided with the sealing ring 303; the manual pump 1 includes a pump body 101, the pump body 101 is in contact with a seal ring 303, and the pump body 101 is connected to a spring reed 301.
The elastic reed 301, the tray 302, the sealing ring 303 and the pump body 101 are tightly attached to form a sealing ring, the oil return pipeline 4 is arranged inside the sealing ring, and oil 201 is arranged outside the sealing ring.
The elastic spring 301 is provided with a first mounting hole 3015, the tray 302 is provided with a projection 3021, and the projection 3021 is mounted in the first mounting hole 3015; the tray 302 is also provided with a groove 3022 and an oil passing groove 3023, the groove 3022 is internally provided with a sealing ring 303, and the oil passing groove 3023 is opposite to the oil return pipeline 4. The tray 302 and the spring reed 301 are connected through the protrusion 3021 and the first mounting hole 3015, and the structure is stable.
Example 4
A hydraulic lifting device with an oil tank check back pressure valve comprises an oil tank 2 and a manual pump 1, wherein the manual pump 1 is provided with the oil tank 2, the oil tank 2 is filled with oil 201, an oil tank check back pressure valve 3 is arranged between the manual pump 1 and the oil 201, the oil tank check back pressure valve 3 comprises an elastic reed 301, a tray 302 and a sealing ring 303, the elastic reed 301 is connected with the tray 302, and the tray 302 is provided with the sealing ring 303; the manual pump 1 includes a pump body 101, the pump body 101 is in contact with a seal ring 303, and the pump body 101 is connected to a spring reed 301.
The elastic reed 301, the tray 302, the sealing ring 303 and the pump body 101 are tightly attached to form a sealing ring, the oil return pipeline 4 is arranged inside the sealing ring, and oil 201 is arranged outside the sealing ring.
The elastic reed 301 is provided with a first mounting hole 3015, the tray 302 is provided with a protrusion 3021, and the protrusion 3021 is mounted in the first mounting hole 3015; the tray 302 is also provided with a groove 3022 and an oil passing groove 3023, the groove 3022 is internally provided with a sealing ring 303, and the oil passing groove 3023 is opposite to the oil return pipeline 4. The tray 302 and the spring reed 301 are connected through the protrusion 3021 and the first mounting hole 3015, and the structure is stable.
The oil tank check back pressure valve 3 further comprises a first rivet 3041 and a second rivet 3042, a second mounting hole 3014 and a third mounting hole 3016 are further arranged on the elastic reed 301 and located on two sides of the first mounting hole 3015, the first rivet 3041 penetrates through the second mounting hole 3014 and is riveted with the pump body 101, and the second rivet 3042 penetrates through the third mounting hole 3016 and is riveted with the pump body 101. The oil tank check back pressure valve 3 is mounted on the pump body 101 through a first rivet 3041 and a second rivet 3042, and the structure is stable.
Example 5
A hydraulic lifting device with an oil tank back pressure check valve comprises an oil tank 2 and a manual pump 1, wherein the manual pump 1 is provided with the oil tank 2, the oil tank 2 is filled with oil 201, the oil tank back pressure check valve 3 is arranged between the manual pump 1 and the oil 201, the oil tank back pressure check valve 3 comprises an elastic reed 301, a tray 302 and a sealing ring 303, the elastic reed 301 is connected with the tray 302, and the tray 302 is provided with the sealing ring 303; the manual pump 1 includes a pump body 101, the pump body 101 is in contact with a seal ring 303, and the pump body 101 is connected to a spring reed 301.
The elastic reed 301, the tray 302, the sealing ring 303 and the pump body 101 are tightly attached to form a sealing ring, the oil return pipeline 4 is arranged inside the sealing ring, and oil 201 is arranged outside the sealing ring.
The elastic reed 301 is provided with a first mounting hole 3015, the tray 302 is provided with a protrusion 3021, and the protrusion 3021 is mounted in the first mounting hole 3015; the tray 302 is also provided with a groove 3022 and an oil passing groove 3023, the groove 3022 is internally provided with a sealing ring 303, and the oil passing groove 3023 is opposite to the oil return pipeline 4. The tray 302 and the spring reed 301 are connected through the protrusions 3021 and the first mounting holes 3015, and the structure is stable.
The oil tank check back pressure valve 3 further comprises a first rivet 3041 and a second rivet 3042, a second mounting hole 3014 and a third mounting hole 3016 are further arranged on the elastic reed 301 and located on two sides of the first mounting hole 3015, the first rivet 3041 penetrates through the second mounting hole 3014 and is riveted with the pump body 101, and the second rivet 3042 penetrates through the third mounting hole 3016 and is riveted with the pump body 101. The oil tank check back pressure valve 3 is mounted on the pump body 101 through the first rivet 3041 and the second rivet 3042, and the structure is stable.
The elastic reed 301 comprises a first bending section 3011, an elastic section 3012 and a second bending section 3013, the first bending section 3011 is connected with the second bending section 3013 through the elastic section 3012, a second mounting hole 3014 is arranged on the first bending section 3011, the elastic section 3012 is provided with a first mounting hole 3015, and the second bending section 3013 is provided with a third mounting hole 3016. The combination of first bending section 3011, elastic section 3012 and second bending section 3013 provides spring reed 301 with suitable elasticity.
Claims (7)
1. The utility model provides a take hydraulic pressure lifting devices of oil tank non return back pressure valve, includes oil tank (2) and hand pump (1), is equipped with oil tank (2) on hand pump (1), is full of fluid (201), its characterized in that in oil tank (2): an oil tank check back pressure valve (3) is arranged between the manual pump (1) and the oil liquid (201), the oil tank check back pressure valve (3) comprises an elastic reed (301), a tray (302) and a sealing ring (303), the elastic reed (301) is connected with the tray (302), and the sealing ring (303) is arranged on the tray (302); the manual pump (1) comprises a pump body (101), the pump body (101) is in contact with a sealing ring (303), and the pump body (101) is connected with an elastic reed (301).
2. The hydraulic lifting device with the oil tank check back pressure valve as recited in claim 1, characterized in that: the elastic reed (301), the tray (302), the sealing ring (303) and the pump body (101) are tightly attached to form a sealing ring, an oil return pipeline (4) is arranged inside the sealing ring, and oil (201) is arranged outside the sealing ring.
3. The hydraulic lifting device with the oil tank check back pressure valve as recited in claim 2, characterized in that: a first mounting hole (3015) is arranged on the elastic reed (301), a bulge (3021) is arranged on the tray (302), and the bulge (3021) is mounted in the first mounting hole (3015); the tray (302) is also provided with a groove (3022) and an oil passing groove (3023), the groove (3022) is internally provided with a sealing ring (303), and the oil passing groove (3023) is opposite to the oil return pipeline (4).
4. The hydraulic lifting device with the oil tank check back pressure valve as recited in claim 1, characterized in that: the oil tank check back pressure valve (3) further comprises a first rivet (3041) and a second rivet (3042), a second mounting hole (3014) and a third mounting hole (3016) are further formed in two sides, located on the first mounting hole (3015), of the elastic reed (301), the first rivet (3041) penetrates through the second mounting hole (3014) and then is riveted with the pump body (101), and the second rivet (3042) penetrates through the third mounting hole (3016) and then is riveted with the pump body (101).
5. The hydraulic lifting device with the oil tank back pressure check valve is characterized in that: elastic reed (301) include first crooked section (3011), elasticity section (3012) and the crooked section of second (3013), first crooked section (3011) is connected through elasticity section (3012) and the crooked section of second (3013), is equipped with second mounting hole (3014) on first crooked section (3011), and elasticity section (3012) are equipped with first mounting hole (3015), and the crooked section of second (3013) are equipped with third mounting hole (3016).
6. The hydraulic lifting device with the oil tank check back pressure valve as recited in claim 1, characterized in that: the elastic reed (301) is the elastic reed (301) that the metal was made, and sealing washer (303) are sealing washer (303) that nitrile rubber made, and sealing washer (303) are O type sealing washer, and tray (302) are tray (302) that the nylon material made.
7. The hydraulic lifting device with the oil tank check back pressure valve as recited in claim 2, characterized in that: when the pressure in the oil return pipeline (4) is greater than the elastic force of the elastic reed (301), the sealing ring (303) is separated from the pump body (101), and the oil in the oil return pipeline (4) flows into the oil tank (2); when the pressure in the oil return pipeline (4) is smaller than or equal to the elastic force of the elastic reed (301), the sealing ring (303) returns to the original position to be in contact with the pump body (101) again, and sealing is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122828107.3U CN216618054U (en) | 2021-11-17 | 2021-11-17 | Hydraulic lifting device with oil tank non-return back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122828107.3U CN216618054U (en) | 2021-11-17 | 2021-11-17 | Hydraulic lifting device with oil tank non-return back pressure valve |
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| CN216618054U true CN216618054U (en) | 2022-05-27 |
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| CN202122828107.3U Active CN216618054U (en) | 2021-11-17 | 2021-11-17 | Hydraulic lifting device with oil tank non-return back pressure valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060328A (en) * | 2021-11-17 | 2022-02-18 | 浙江科力车辆控制系统有限公司 | Hydraulic lifting device with oil tank non-return back pressure valve |
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2021
- 2021-11-17 CN CN202122828107.3U patent/CN216618054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060328A (en) * | 2021-11-17 | 2022-02-18 | 浙江科力车辆控制系统有限公司 | Hydraulic lifting device with oil tank non-return back pressure valve |
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