CN211733716U - Oil pump throttling mechanism of jack - Google Patents
Oil pump throttling mechanism of jack Download PDFInfo
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- CN211733716U CN211733716U CN201921700391.2U CN201921700391U CN211733716U CN 211733716 U CN211733716 U CN 211733716U CN 201921700391 U CN201921700391 U CN 201921700391U CN 211733716 U CN211733716 U CN 211733716U
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Abstract
An oil pump throttling mechanism of a jack comprises an oil pump body, wherein the oil pump body comprises a valve body, a valve core in sealing sliding fit with the valve body and an oil cylinder with a piston rod assembly, the oil cylinder is arranged in an oil storage cavity in the front of the valve body, the valve core and a universal joint component are arranged at the rear of the valve body, the oil cylinder is communicated with an oil cavity at the front end of the valve core through an oil inlet passage, and the oil cylinder is communicated with the oil storage cavity through an oil outlet passage; the oil outlet passage is sequentially divided into a throttling section and an oil outlet section, wherein an oil saving control part is assembled in a throttling cavity of the throttling section, an oil inlet end of the oil outlet section and an oil outlet end of the throttling section are assembled with an oil drainage control part, the oil outlet end of the oil outlet section is divided into two branches, the first branch is communicated with the oil storage cavity, and the second branch is communicated with the outside of the valve body. The utility model has the advantages that: the pressure bearing of the jack can be adapted to different oil drainage speeds, so that the jack can stably descend.
Description
Technical Field
The utility model relates to an oil pump throttling mechanism of jack.
Background
The oil drainage speed rate of the existing jack oil pump is high, after a common jack jacks a heavy object, when the heavy object needs to fall down, the common jack oil pump does not have a slow oil return function, so that the common jack oil pump is high in speed in the heavy object falling process, the heavy object falling process is easy to unbalance, accidents occur easily, and the slow oil return oil pump jack can keep the heavy object to stably fall down in the heavy object falling process and is safe and reliable.
Disclosure of Invention
In order to solve the problem, the utility model provides an oil pump throttling mechanism of jack that can descend at a slow speed.
An oil pump throttling mechanism of jack, including the oil pump body, its characterized in that: the oil pump body comprises a valve body, a valve core in sealing sliding fit with the valve body and an oil cylinder with a piston rod assembly, the oil cylinder is arranged in an oil storage cavity in the front of the valve body, the valve core and a universal joint component are arranged at the rear of the valve body, the oil cylinder is communicated with the oil cavity at the front end of the valve core through an oil inlet passage, and the oil cylinder is communicated with the oil storage cavity through an oil outlet passage; the oil outlet passage is sequentially divided into a throttling section and an oil outlet section, wherein an oil saving control part is assembled in a throttling cavity of the throttling section, an oil inlet end of the oil outlet section and an oil outlet end of the throttling section are assembled with an oil drainage control part, the oil outlet end of the oil outlet section is divided into two branches, the first branch is communicated with the oil storage cavity, and the second branch is communicated with the outside of the valve body;
the throttling control part comprises a throttling sleeve capable of axially moving along a throttling cavity, a throttling pin capable of axially moving along the throttling sleeve, a throttling pin pressure spring and a limiting pin, wherein the throttling sleeve is axially provided with a central through hole which is communicated up and down, and the middle part of the side wall is provided with an over-position hole which is used for being communicated with an oil outlet of the oil cylinder; the limiting pin and the throttling pin are sequentially inserted into the central through hole of the throttling sleeve from top to bottom, and are connected through a throttling pin compression spring;
the oil drainage control part comprises a universal joint part and a plugging steel ball, the outer end part of the universal joint part is connected with the snap, and the inner end part of the universal joint part is abutted against one side of the first steel ball and is in contact connection with the first steel ball; the first steel ball is arranged at a pressure relief cavity at the joint of the throttling section and the flow section, wherein one side of the blocking steel ball is in contact connection with the inner end part of the universal joint part, and the other side of the blocking steel ball is blocked on an oil outlet passage of the valve body and is used for controlling the on-off of the oil storage cavity and the oil cylinder.
The piston rod assembly comprises a piston rod for outputting power and a piston for sealing, the inner end of the piston rod is inserted into the inner cavity of the oil cylinder and is in sealing sliding connection with the oil cylinder through the piston arranged at the inner end, and the piston rod linearly reciprocates along the axial direction of the oil cylinder.
When the upper end surface of the throttling sleeve is in sealing contact with the mounting end surface of the valve body to form a sealing surface, the over-position hole is just communicated with the oil outlet of the oil cylinder.
And a gap for passing oil is reserved between the throttling sleeve and the outer wall of the throttling pin.
The oil storage cavity is provided with an oil drain hole.
The tail end of the second branch is provided with a plugging component which comprises a blocking steel ball and a plugging bolt, wherein the end part of the plugging bolt is inserted into the first branch of the valve body and is in threaded connection with the first branch; the blocking steel ball is arranged in the first branch, and the spherical surface of the blocking steel ball is in contact connection with the blocking bolt.
The top surface of spacer pin is equipped with the recess that is used for the draining.
And (3) realizing a throttling process:
when the jack is used for lifting a heavy object and the valve body needs to be unloaded, the universal joint part moves towards the A direction, and the plugging steel ball also moves towards the A direction under the action of the pressure difference of the hydraulic oil.
At the moment, the throttle pin can move towards the direction B in the throttle sleeve under the action of the pressure difference of the hydraulic oil, the throttle sleeve can also move towards the direction B under the action of the pressure difference of the hydraulic oil, and the upper end surface of the throttle sleeve and the mounting end surface in the valve body form a sealing surface.
When the throttling pin moves towards the direction B and exceeds the over-position hole on the throttling sleeve, the hydraulic oil can only flow back to the oil storage cavity through a small gap between the central through hole of the throttling sleeve and the excircle of the throttling pin, so that the throttling process is realized.
When the jack is unloaded or bears small pressure, when the valve body is unloaded, the hydraulic pressure difference between the upper end surface and the lower end surface of the throttle pin is not enough to push the throttle pin and the throttle pin pressure spring to move together to the B direction until the over-position hole is completely sealed, most of hydraulic oil at the moment directly flows back to the oil storage cavity through the over-position hole, and the over-position hole is larger, so that the flow of the hydraulic oil is larger, and the unloading process of the valve body part of the jack is quicker.
The operation of the limiting pin mainly prevents the throttling pin from being limited at a certain position when the throttling pin meets large pressure, and prevents the pressure spring of the throttling pin from being damaged by the pressure of the throttling pin to cause the failure of the pressure spring of the throttling pin. Meanwhile, the plane of the limit pin is provided with a larger groove for oil drainage.
The utility model has the advantages that: the pressure bearing of the jack can be adapted to different oil drainage speeds, so that the jack can stably descend.
Drawings
Fig. 1 is a structural view of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
With reference to the accompanying drawings:
the throttling control component 6 comprises a throttling sleeve 61 capable of axially moving along a throttling cavity, a throttling pin 62 capable of axially moving along the throttling sleeve, a throttling pin pressure spring 63 and a limiting pin 64, wherein the throttling sleeve 61 is axially provided with a central through hole which is communicated up and down, and the middle part of the side wall is provided with an over-position hole 611 used for being communicated with an oil outlet of the oil cylinder; the limiting pin 64 and the throttling pin 62 are sequentially inserted into the central through hole of the throttling sleeve 61 from top to bottom, and the limiting pin 64 and the throttling pin 62 are connected through a throttling pin pressure spring 63;
the oil drainage control part 7 comprises a universal joint part 71 and a blocking steel ball 72, the outer end part of the universal joint part 71 is connected with the snap 8, and the inner end part of the universal joint part abuts against one side of the blocking steel ball 71 and is in contact connection with the blocking steel ball 71; the plugging steel ball 71 is arranged at a pressure relief cavity at the joint of the throttling section and the flow section, wherein one side of the plugging steel ball 71 is in contact connection with the inner end part of the universal joint part 71, and the other side of the plugging steel ball 71 is plugged on an oil outlet passage of the valve body 1 and used for controlling the connection and disconnection between the oil storage cavity 11 and the oil cylinder 3.
The piston rod assembly 4 comprises a piston rod for outputting power and a piston for sealing, the inner end of the piston rod is inserted into the inner cavity of the oil cylinder and is in sealed sliding connection with the oil cylinder through the piston arranged at the inner end, and the piston rod can linearly reciprocate along the axial direction of the oil cylinder.
When the upper end surface of the throttle sleeve 61 is in sealing contact with the mounting end surface 12 of the valve body 1 to form a sealing surface, the over-position hole 611 is just communicated with the oil outlet of the oil cylinder 3.
A gap for oil passing is reserved between the throttling sleeve 61 and the outer wall of the throttling pin 62.
The oil storage chamber 11 is provided with an oil drain hole.
The end of the second branch 522 is provided with a plugging component which comprises a blocking steel ball and a plugging bolt, wherein the end part of the plugging bolt is inserted into the first branch of the valve body and is in threaded connection with the first branch; the blocking steel ball is arranged in the first branch, and the spherical surface of the blocking steel ball is in contact connection with the blocking bolt.
The top surface of the limit pin 64 is provided with a groove for oil drainage.
And (3) realizing a throttling process:
when the jack is used for lifting a heavy object and the valve body needs to be unloaded, the universal joint part moves towards the A direction, and the plugging steel ball also moves towards the A direction under the action of the pressure difference of the hydraulic oil.
At this time, the throttle pin can move towards the direction B in the throttle sleeve under the action of the pressure difference of the hydraulic oil 9, the throttle sleeve can also move towards the direction B under the action of the pressure difference of the hydraulic oil, and the upper end surface of the throttle sleeve and the mounting end surface in the valve body form a sealing surface.
When the throttling pin moves towards the direction B and exceeds the over-position hole on the throttling sleeve, the hydraulic oil can only flow back to the oil storage cavity through a small gap between the central through hole of the throttling sleeve and the excircle of the throttling pin, so that the throttling process is realized.
When the jack is unloaded or bears small pressure, when the valve body is unloaded, the hydraulic pressure difference between the upper end surface and the lower end surface of the throttle pin is not enough to push the throttle pin and the throttle pin pressure spring to move together to the B direction until the over-position hole is completely sealed, most of hydraulic oil at the moment directly flows back to the oil storage cavity through the over-position hole, and the over-position hole is larger, so that the flow of the hydraulic oil is larger, and the unloading process of the valve body part of the jack is quicker.
The operation of the limiting pin mainly prevents the throttling pin from being limited at a certain position when the throttling pin meets large pressure, and prevents the pressure spring of the throttling pin from being damaged by the pressure of the throttling pin to cause the failure of the pressure spring of the throttling pin. Meanwhile, the plane of the limit pin is provided with a larger groove for oil drainage.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.
Claims (6)
1. The utility model provides an oil pump throttling mechanism of jack, includes the oil pump body, its characterized in that: the oil pump body comprises a valve body, a valve core in sealing sliding fit with the valve body and an oil cylinder with a piston rod assembly, the oil cylinder is arranged in an oil storage cavity in the front of the valve body, the valve core and a universal joint component are arranged at the rear of the valve body, the oil cylinder is communicated with the oil cavity at the front end of the valve core through an oil inlet passage, and the oil cylinder is communicated with the oil storage cavity through an oil outlet passage; the oil outlet passage is sequentially divided into a throttling section and an oil outlet section, wherein an oil saving control part is assembled in a throttling cavity of the throttling section, an oil inlet end of the oil outlet section and an oil outlet end of the throttling section are assembled with an oil drainage control part, the oil outlet end of the oil outlet section is divided into two branches, the first branch is communicated with the oil storage cavity, and the second branch is communicated with the outside of the valve body;
the oil-saving control part comprises a throttling sleeve capable of axially moving along a throttling cavity, a throttling pin capable of axially moving along the throttling sleeve, a throttling pin pressure spring and a limiting pin, wherein the throttling sleeve is axially provided with a central through hole which is communicated up and down, and the middle part of the side wall is provided with an over-position hole which is used for being communicated with an oil outlet of the oil cylinder; the limiting pin and the throttling pin are sequentially inserted into the central through hole of the throttling sleeve from top to bottom, and are connected through a throttling pin compression spring;
the oil drainage control part comprises a universal joint part and a plugging steel ball, the outer end part of the universal joint part is connected with the snap, and the inner end part of the universal joint part is abutted against one side of the plugging steel ball and is in contact connection with the plugging steel ball; the plugging steel ball is arranged at a pressure relief cavity at the joint of the throttling section and the flow section, wherein one side of the plugging steel ball is in contact connection with the inner end part of the universal joint component, and the other side of the plugging steel ball is plugged on an oil outlet passage of the valve body and used for controlling the on-off of the oil storage cavity and the oil cylinder.
2. The oil pump throttling mechanism of a jack as claimed in claim 1, wherein: the piston rod assembly comprises a piston rod for outputting power and a piston for sealing, the inner end of the piston rod is inserted into the inner cavity of the oil cylinder and is in sealing sliding connection with the oil cylinder through the piston arranged at the inner end, and the piston rod linearly reciprocates along the axial direction of the oil cylinder.
3. A jack oil pump throttling mechanism as claimed in claim 2, wherein: when the upper end surface of the throttling sleeve is in sealing contact with the mounting end surface of the valve body to form a sealing surface, the over-position hole is just communicated with the oil outlet of the oil cylinder.
4. A jack oil pump throttling mechanism as claimed in claim 3, wherein: and a gap for passing oil is reserved between the throttling sleeve and the outer wall of the throttling pin.
5. The oil pump throttling mechanism of a jack as claimed in claim 1, wherein: the oil storage cavity is provided with an oil drain hole.
6. The oil pump throttling mechanism of a jack as claimed in claim 1, wherein: the top surface of spacer pin is equipped with the recess that is used for the draining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700391.2U CN211733716U (en) | 2019-10-11 | 2019-10-11 | Oil pump throttling mechanism of jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700391.2U CN211733716U (en) | 2019-10-11 | 2019-10-11 | Oil pump throttling mechanism of jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211733716U true CN211733716U (en) | 2020-10-23 |
Family
ID=72850589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921700391.2U Active CN211733716U (en) | 2019-10-11 | 2019-10-11 | Oil pump throttling mechanism of jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211733716U (en) |
-
2019
- 2019-10-11 CN CN201921700391.2U patent/CN211733716U/en active Active
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