High-sealing lifting pump
By using stable structure, seals, smoothing and limiting parts in the lifting pump, the problems of unsmooth operation and poor sealing of the drive shaft are solved, the operating efficiency and life of the pump body are improved, and the noise is reduced.
Patent Information
- Application Number
- CN202422914711.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The transmission shaft of the traditional lift pump is not smooth and the cover plate and the housing are poorly sealed, resulting in high noise and low operating efficiency.
A high-seal lift pump is designed, using a stable structure to increase oil pressure flow and seals to improve seal strength, optimize the smoothness and stability of the spindle and countershaft through smoothing and limiting parts, and perform precision on gears. The grinding process is processed to reduce noise.
It improves the oil pressure, stability and service life of the pump body, while reducing noise, avoiding high-temperature heating when the pump body size increases and gear meshing.
Smart Images
Figure CN222254318U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lift pumps, in particular to a high-seal lift pump. Background Art
[0002] A lift pump is a hydraulic device used to lift and lower a truck cab, and includes a housing and a cover plate connected to both sides of the housing to close a pump chamber. A double-gear external meshing structure is provided in the pump chamber of the housing, i.e., the main shaft and the secondary shaft are meshed through their respective gears. In the pump chamber of a traditional lift pump, the space between the two gears and the pump chamber is small, resulting in limited and too low flow. The prior art has a technical structure for increasing the size of the pump chamber, but changing the size of the pump chamber is likely to increase the size of the housing, and then increase the size of the pump body itself. At the same time, the tooth surface of the gears of the traditional pump body is not smooth, resulting in excessive noise when the lift pump is working, and the traditional main shaft and secondary shaft do not run smoothly enough, which affects the operating efficiency of the pump body. Utility Model Content
[0003] In view of the shortcomings of the prior art, the utility model provides a high-sealing lift pump to solve the problems of uneven operation of the transmission shaft of the traditional lift pump and poor sealing between the cover plate and the shell.
[0004] To achieve the above-mentioned purpose, the utility model provides a high-sealing lifting pump, including a shell, cover plates are detachably connected on both sides of the shell, a pump chamber is opened on the shell, a main gear and a sub-gear are movably arranged in the pump chamber, the main gear and the sub-gear are meshingly arranged, the main gear is coaxially connected to a main shaft for passing through the cover plate, the sub-gear is coaxially connected to the sub-shaft, the main gear and the sub-gear are both provided with a stabilizing structure for increasing the flow rate and stability of the operating oil pressure, a sealing member for improving the sealing strength between the cover plate and the shell is provided between the cover plate and the shell, a through hole for the main shaft to pass through and a sub-hole for rotating with the sub-shaft are penetrated on the cover plate, a smoothing member for improving the smoothness and stability of the operation of the main shaft and the sub-shaft and a limiting member for cooperating with the smoothing member to avoid the smoothing member affecting the operation of the main shaft and the sub-shaft are provided on the through hole and the sub-hole.
[0005] The benefits of adopting the above technical solution are: in the above technology, the oil pressure flow and stability of the lifting pump are increased through a stable structure, the sealing strength between the cover plate and the shell is improved through a seal, and the running smoothness and stability of the main shaft and the secondary shaft are improved through smooth parts, and the smooth parts are restricted by limiting parts to avoid affecting the rotation of the main shaft and the secondary shaft. The above technology is set up to increase the oil pressure and oil volume of the pump body, improve the running stability and service life of the pump body, and reduce the noise generated by the operation of the pump body.
[0006] The utility model is further configured as follows: adjacent teeth of the main gear are connected by a smooth arc surface to form a first arc chamber, and adjacent teeth of the auxiliary gear are connected by a smooth arc surface to form a second arc chamber, and the first arc chamber and the second arc chamber are stable structures.
[0007] The benefits of adopting the above technical solution are: in the above technology, a smooth arc surface is machined between adjacent teeth to form a first arc chamber and a second arc chamber, so that the oil pressure flow rate is increased through the first arc chamber and the second arc chamber, that is, the space between the smooth arc surface and the inner circumferential wall of the pump chamber is increased to increase the oil pressure flow rate, thereby improving the overall operating efficiency and operating smoothness of the pump chamber. Through the arrangement of the first arc chamber and the second arc chamber, the oil pressure flow rate can be increased without increasing the pump chamber space, thereby avoiding an increase in the size of the pump body.
[0008] The utility model is further configured as follows: two sealing grooves are arranged on the outer edge of the pump chamber, and the two sealing grooves are respectively opened circumferentially on the side walls of the shell. The sealing member includes a sealing ring arranged in the sealing groove, and the sealing ring is made of a rubber sealing material. The outer wall of the sealing ring is set to be tightly fitted with the inner wall of the adjacent cover plate.
[0009] The advantages of adopting the above technical solution are as follows: in the above technology, the sealing between the cover plate and the housing is achieved through the expansion fit between the sealing ring and the cover plate, thereby improving the sealing strength. At the same time, the sealing groove is located at the outer edge of the pump chamber, further improving the sealing between the outer edge of the pump chamber and the cover plate.
[0010] The utility model is further configured that: the smooth member comprises a bearing, the bearing on the through hole is coaxially connected to the main shaft, and the bearing on the secondary hole is coaxially connected to the secondary shaft.
[0011] The benefit of adopting the above technical solution is that the running smoothness and stability of the main shaft and the secondary shaft can be improved by setting the bearings.
[0012] The utility model is further configured as follows: the limiting member includes a limiting ring, the inner circumferential wall of the through hole and the inner circumferential wall of the auxiliary hole are both circumferentially provided with a first tooth groove, the outer circumferential wall of the limiting ring is provided with a second tooth groove for meshing with the first tooth groove, the inner circumferential wall of the limiting ring is provided with a third tooth groove circumferentially, and the outer circumferential wall of the bearing outer ring is provided with a fourth tooth groove circumferentially provided with the third tooth groove.
[0013] The benefits of adopting the above technical solution are: in the above technology, the limiting ring realizes radial limitation and axial rotation limitation of the two limiting rings in the through hole and the auxiliary hole respectively through the engagement of the second tooth groove with the first tooth groove, thereby improving the stability of the limiting ring in the through hole and the auxiliary hole, and at the same time, the engagement of the third tooth groove with the fourth tooth groove realizes the axial rotation limitation and radial limitation of the outer ring of the bearing by the limiting ring, thereby improving the stability of the bearing, to ensure that the bearing will not loosen or shake when the pump body runs at high speed, affecting the operation of the main shaft or the auxiliary shaft, and at the same time avoiding the bearing falling off and causing operation failure.
[0014] The utility model is further configured as follows: the through-holes and the secondary holes are both provided with limit rings for abutting and cooperating with the adjacent bearing outer ring side walls; the pump chamber is provided with a baffle plate for combining with the limit ring to achieve bearing clamping and limiting; the baffle plate is provided with openings for the main shaft and the secondary shaft to pass through.
[0015] The benefits of adopting the above technical solution are: in the above technology, the clamping and limiting of the bearing is achieved through the cooperation of the limit ring and the baffle, so as to ensure that the bearing will not loosen or shake when the pump body runs at high speed, affecting the operation of the main shaft or the secondary shaft, and at the same time avoid the bearing falling off and causing operation failure.
[0016] The utility model is further configured that: the main gear and the auxiliary gear are manufactured by a precision gear grinding process.
[0017] The benefits of adopting the above technical solution are: the above technology is used to reduce the noise generated when the main gear and the auxiliary gear are meshing, and to improve the stability and service life of the two during meshing and operation. At the same time, the above technology is used to make the meshing of the main gear and the auxiliary gear smooth, so that the lifting pump as a whole is not easy to heat up at high temperature, thereby improving the service life and operation stability of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is an exploded three-dimensional view of the utility model. DETAILED DESCRIPTION
[0019] The utility model provides a high-seal lifting pump, including a shell 1, both sides of the shell 1 are detachably connected with a cover plate 2, a pump chamber 11 is opened on the shell 1, a main gear 12 and a sub-gear 13 are movably arranged in the pump chamber 11, the main gear 12 and the sub-gear 13 are meshed, the main gear 12 is coaxially connected to a main shaft 121 for passing through the cover plate 2, the sub-gear 13 is coaxially connected to a sub-shaft 131, the main gear 12 and the sub-gear 13 are both provided with a stabilizing structure for increasing the flow rate and stability of the running oil pressure, a sealing member for improving the sealing strength between the cover plate 2 and the shell 1 is provided between the cover plate 2 and the shell 1, and the cover The plate 2 is penetrated by a through hole 21 for the main shaft 121 to pass through and a secondary hole 22 for rotationally cooperating with the secondary shaft 131. The through hole 21 and the secondary hole 22 are both provided with a smoothing member for improving the smoothness and stability of the operation of the main shaft 121 and the secondary shaft 131 and a limiting member for cooperating with the smoothing member to prevent the smoothing member from affecting the operation of the main shaft 121 and the secondary shaft 131. The adjacent teeth of the main gear 12 are connected by a smooth arc surface and form a first arc chamber 122. The adjacent teeth of the secondary gear 13 are connected by a smooth arc surface and form a second arc chamber 132. The first arc chamber 122 and the second arc chamber 132 are stable structures. The outer edge of the pump chamber 11 is provided with two sealing grooves 3, and the two sealing grooves 3 are respectively opened circumferentially on the side wall of the housing 1. The sealing member includes a sealing ring 31 arranged in the sealing groove 3, and the sealing ring 31 is made of a rubber sealing material. The outer wall of the sealing ring 31 is set with an expansion fit with the inner wall of the adjacent cover plate 2. The smooth member includes a bearing 4, and the bearing 4 on the through hole 21 is coaxially connected to the main shaft 121, and the bearing 4 on the secondary hole 22 is coaxially connected to the secondary shaft 131. The limiting member includes a limiting ring 41, and the inner circumferential wall of the through hole 21 and the inner circumferential wall of the secondary hole 22 are both circumferentially opened with a first tooth groove 23, and the limiting ring 41 A second tooth groove 411 for meshing with the first tooth groove 23 is provided on the outer circumferential wall, a third tooth groove 412 is circumferentially provided on the inner circumferential wall of the limit ring 41, a fourth tooth groove 42 for meshing with the third tooth groove 412 is circumferentially provided on the outer circumferential wall of the outer ring of the bearing 4, a limit ring 5 for abutting and cooperating with the adjacent side wall of the outer ring of the bearing 4 is provided in the through hole 21 and the auxiliary hole 22, a baffle 51 for combining with the limit ring 5 to clamp and limit the bearing 4 is provided in the pump chamber 11, an opening 52 for the main shaft 121 and the auxiliary shaft 131 to pass through is provided on the baffle 51, and the main gear 12 and the auxiliary gear 13 are made by precision gear grinding technology.
[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.
Claims
1. A high-sealing lift pump, comprising a housing, with cover plates detachably connected to both sides of the housing, a pump chamber opened on the housing, a main gear and a sub-gear movably arranged in the pump chamber, the main gear and the sub-gear meshingly arranged, the main gear coaxially connected to a main shaft for passing through the cover plate, the sub-gear coaxially connected to a sub-shaft, characterized in that: The main gear and the secondary gear are both provided with a stabilizing structure for increasing the flow and stability of the operating oil pressure. A sealing member for improving the sealing strength between the cover plate and the housing is provided between the cover plate and the housing. The cover plate is penetrated by a through hole for the main shaft to pass through and a secondary hole for cooperating with the secondary shaft to rotate. The through hole and the secondary hole are both provided with a smoothing member for improving the smoothness and stability of the operation of the main shaft and the secondary shaft, and a limiting member for cooperating with the smoothing member to avoid the smoothing member affecting the operation of the main shaft and the secondary shaft.
2. A high-sealing lift pump according to claim 1, characterized in that: Adjacent teeth of the main gear are connected by a smooth arc surface to form a first arc chamber, and adjacent teeth of the auxiliary gear are connected by a smooth arc surface to form a second arc chamber. The first arc chamber and the second arc chamber are stable structures.
3. A high-sealing lift pump according to claim 1, characterized in that: The outer edge of the pump chamber is provided with two sealing grooves, which are respectively opened circumferentially on the side wall of the shell. The sealing member includes a sealing ring arranged in the sealing groove, and the sealing ring is made of rubber sealing material. The outer wall of the sealing ring is set to be tightly fitted with the inner wall of the adjacent cover plate.
4. A high-sealing lift pump according to claim 1, characterized in that: The smooth member comprises a bearing, the bearing on the through hole is coaxially connected to the main shaft, and the bearing on the secondary hole is coaxially connected to the secondary shaft.
5. A high-seal lift pump according to claim 4, characterized in that: The limiting member includes a limiting ring, the inner circumferential wall of the through hole and the inner circumferential wall of the auxiliary hole are both circumferentially provided with a first tooth groove, the outer circumferential wall of the limiting ring is provided with a second tooth groove for engaging with the first tooth groove, the inner circumferential wall of the limiting ring is provided with a third tooth groove circumferentially, and the outer circumferential wall of the bearing outer ring is provided with a fourth tooth groove circumferentially provided with the third tooth groove.
6. A high-sealing lift pump according to claim 4, characterized in that: The through hole and the secondary hole are both provided with a limiting ring for abutting and cooperating with the side wall of the adjacent bearing outer ring. The pump cavity is provided with a baffle for combining with the limiting ring to achieve bearing clamping and limiting. The baffle is provided with openings for the main shaft and the secondary shaft to pass through.
7. A high-sealing lift pump according to claim 1, characterized in that: The main gear and the auxiliary gear are manufactured by precision gear grinding.