CN211370706U - Stop limit structure of micro pump transmission shaft - Google Patents
Stop limit structure of micro pump transmission shaft Download PDFInfo
- Publication number
- CN211370706U CN211370706U CN201922408430.8U CN201922408430U CN211370706U CN 211370706 U CN211370706 U CN 211370706U CN 201922408430 U CN201922408430 U CN 201922408430U CN 211370706 U CN211370706 U CN 211370706U
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- plate
- pump body
- limit structure
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model relates to a locking limit structure of micropump transmission shaft, micropump include the transmission shaft, the valve plate, the sloping cam plate and the pump body, and in the valve plate and sloping cam plate were worn to establish by the transmission shaft, locking limit structure included the locating part, and the locating part setting is on the pump body, and the locating part supports respectively to press valve plate and sloping cam plate, the locating part is located the radial direction of valve plate and sloping cam plate. The utility model discloses a stop limit structure of micropump transmission shaft has increased the locating part through the pump body, fixes valve plate and sloping cam plate to prevent that they from taking place the displacement radially and axially, guarantee the normal operating of cylinder body, satisfy the normal operating requirement of micropump.
Description
Technical Field
The utility model relates to a plunger pump technical field of small discharge capacity, in particular to locking limit structure of micropump transmission shaft.
Background
The plunger pump is a common power driving element in the hydraulic industry, is widely applied to various industries such as aerospace, ships, marine equipment, mine metallurgy, energy sources and intelligent equipment, has large market demand and wide application range, but along with the increasing demands of increasingly lightening, intelligentizing and centralized control on the plunger pump by social fine division, artificial intelligence, small robots and the like, the traditional plunger pump can not meet the increasing market demand on the miniature plunger pump in various industries gradually. However, at present, the miniature plunger pump in domestic market is only provided with a foreign individual brand, and the miniature plunger pump with an independent brand is not put on the market. With the increasing demand of micro integrated hydraulic systems, various robots and other working conditions requiring large output force, the demand of micro hydraulic plunger pumps is also called. The product is imported from foreign countries all the time, at present, the micro pump has large market demand in China, but is still in the research and development stage in China, so that the micro displacement plunger pump which is suitable for robots and intelligent equipment and has small volume and large output force is urgently needed to be developed so as to fill the blank in the field in China.
The transmission shaft is one of important parts of the micro pump, and is usually in a drum spline transmission mode with a cylinder body to convert hydraulic pressure into mechanical force; due to the floating operation of the transmission shaft, when the cylinder block runs at a high speed, the rotation of the thrust plate and the swash plate in the radial direction can be generated, so that the plunger pair and the cylinder block can not work normally, and the service performance and the service life of the pump are directly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem, provide one kind and can restrict sloping cam plate, valve plate in the rotation of the radial direction of the pump body to satisfy the locking limit structure of the transmission operation requirement's of pump micropump transmission shaft, concrete technical scheme is as follows:
the utility model provides a stop limit structure of micropump transmission shaft, micropump includes the transmission shaft, the valve plate, sloping cam plate and the pump body, and the transmission shaft is worn to establish in valve plate and sloping cam plate, and stop limit structure includes the locating part, and the locating part sets up on the pump body, and the locating part supports respectively and presses valve plate and sloping cam plate, the locating part is located the radial direction of valve plate and sloping cam plate.
The following is the attached technical proposal of the utility model.
Furthermore, the limiting part comprises a first limiting part and a second limiting part, the valve plate is provided with a first limiting groove, the first limiting part is inserted into the first limiting groove, the swash plate is provided with a second limiting groove, and the second limiting part is inserted into the second limiting groove.
Further, the limiting part is a set screw.
Furthermore, the pump body is provided with a mounting hole, and the limiting part is arranged in the mounting hole.
Furthermore, a first bearing is arranged between the transmission shaft and the valve plate and is arranged in a fixing hole of the valve plate.
Furthermore, a gland is arranged in the pump body and is in threaded connection with the pump body, and the gland is arranged on one side of the valve plate and is located at the tail end of the pump body.
The technical effects of the utility model: the utility model discloses a stop limit structure of micropump transmission shaft has increased the locating part through the pump body, fixes valve plate and sloping cam plate to prevent that they from taking place the displacement radially and axially, guarantee the normal operating of cylinder body, satisfy the normal operating requirement of micropump.
Drawings
Fig. 1 is a schematic diagram of a micropump in an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion C in fig. 1 according to the present invention.
Fig. 3 is an enlarged view of a portion B of fig. 1 according to the present invention.
Fig. 4 is an enlarged view of a portion E of fig. 1 according to the present invention.
Fig. 5 is an enlarged view of a portion D in fig. 1 according to the present invention.
Description of reference numerals: 1-transmission shaft, 2-cylinder block, 3-valve plate, 4-first bearing, 5-second bearing, 6-swash plate, 7-return stroke ball, 8-pump body, 9-locating piece, 11-terminal portion, 12-shaft shoulder, 13-spline, 21-plunger, 22-wave spring, 23-rotary sealing piece, 31-inner end face, 32-fixed orifices, 33-first spacing groove, 61-second spacing groove, 81-gland, 83-return stroke dish, 82, 83-O type sealing washer, 84-mounting hole, 91-first locating piece, 92-second locating piece.
Detailed Description
The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the embodiments listed.
As shown in fig. 1 to 5, a floating type transmission mechanism of the present embodiment is applied to a micro displacement plunger pump, i.e., a micro pump. The floating type transmission mechanism comprises a transmission shaft 1, and the transmission shaft 1 is connected with the cylinder body 2 through a spline. The end part 11 of the transmission shaft 1 is positioned in the port plate 3, and a floating clearance L is formed between the end part 11 and the inner end surface 31 of the port plate 3, and when the transmission shaft 1 rotates, the transmission shaft can float within the axial range allowed by the floating clearance L. In the technical scheme, the transmission shaft 1 and the cylinder body 2 adopt a drum-shaped spline transmission mode to convert hydraulic pressure into mechanical force; when the transmission shaft 1 rotates, micro floating can be performed in the axial range allowed by the floating clearance L, and the maximum range reaches the position of the inner end surface 31 of the valve plate, so that the requirements of the micro pump on transmission stability and high-speed operation are met. Through the technical scheme, the floating type transmission structure can eliminate transmission accumulated stress in a certain range, so that the transmission shaft and other parts are more stable and efficient in connection movement.
In this embodiment, the end portion 11 of the drive shaft 1 is provided with the first bearing 4, and the first bearing 4 is disposed in the fixing hole 32 of the port plate 3. In this embodiment, the transmission shaft 1 has a shoulder 12, and the shoulder 12 supports the inner ring of the second bearing 5, so that the rotation of the transmission shaft 1 is more stable. In this embodiment, the shoulder 12 is located in the swashplate 6. Through above-mentioned technical scheme, can keep the rotation of transmission shaft steady while can float.
In this embodiment, the second bearing 5 is a deep groove ball bearing, and the first bearing 4 is a drawn cup needle bearing. In the embodiment, the matched connecting parts of the transmission shaft 1 in the axial direction comprise a return ball 7 and a cylinder body 2, the transmission shaft and the two parts are connected by a spline, and the return ball 7 and the cylinder body 2 rotate along with the movement of the transmission shaft 1; the shaft shoulder part of the transmission shaft can support the inner ring of the micro deep groove ball bearing; the tail end part supports a drawn outer ring needle roller bearing, the needle roller bearing is assembled in a fixing hole of the port plate, and a certain floating gap is reserved between a transmission shaft at the left end part of the needle roller bearing in the axial direction and the inner end face of the port plate.
In this embodiment, the transmission shaft 1 has a spline 13, the shoulder 12 is located on one side of the spline 13, and the transmission shaft can be connected to the cylinder body by providing the spline 13.
A micro pump comprises a pump body 8, wherein a floating type transmission mechanism is arranged in the pump body 8. The transmission shaft 1 drives the cylinder body 2 to rotate, so that the plungers 21 uniformly distributed on the cylinder body 2 do reciprocating linear rotation in the plunger cavities. The end of each plunger 21 is provided with a slipper, the slipper is pressed on a swash plate 6 which has a certain inclination angle with the axis by a return mechanism through a central wave spring 22, the other end surface of the cylinder body 2 is pressed on the port plate 3, when the cylinder body 2 rotates, the plunger 21 does reciprocating motion, and the oil suction and oil pressing actions of the pump are completed through an oil suction window and an oil pressing window on the port plate 3. The return mechanism includes a return disc 83 and a return ball 7.
In this embodiment, a rotary sealing member 23 is disposed between the transmission shaft 1 and the pump body 8, so as to seal the transmission shaft 1 and the pump body 8.
In this embodiment, the pump body 8 is provided with a port plate 3 and a gland 81, the gland 81 is disposed on the side surface of the port plate 3, and an O-ring 82 is disposed between the gland 81 and the port plate 3, so as to improve the sealing performance. An O-shaped sealing ring 83 is arranged between the valve plate 3 and the pump body 8. In this embodiment, the gland 81 is fixed to the pump body 8 through a thread, the gland 81 is disposed on one side of the port plate 3 and located at the tail end of the pump body 8, and the gland can limit the port plate to move towards the tail end of the pump in the axial direction, so as to prevent the port plate from moving towards the tail end of the pump body.
In this embodiment, the micropump includes a stop limit structure, the stop limit structure includes a limiting member 9, the limiting member 9 is disposed on the pump body 8, the limiting member 9 respectively supports against the port plate 3 and the swash plate 6, and the limiting member 9 is located in the radial direction of the port plate 3 and the swash plate 6. Due to the floating operation of the transmission shaft 1, when the cylinder block 2 runs at a high speed, the rotation of the thrust plate 3 and the swash plate 6 in the radial direction may be generated, so that the possibility that the plunger pair and the cylinder block cannot work normally is caused, and the service performance and the service life of the pump are directly influenced. In the above technical solution, the thrust plate 3 and the swash plate 6 are fixed in the radial direction by adding a stopper to the pump body, so as to prevent the displacement in the radial direction and the axial direction. If the stop limit fixing is not carried out, the valve plate can rotate along with the rotation of the cylinder body in the radial direction, and if the valve plate runs to a certain angle, the pump can not normally absorb and press oil; if the swash plate is not stopped and limited and fixed, the swash plate rotates along with the rotation of the transmission shaft, so that the plunger pair cannot perform reciprocating linear motion, the normal operation of the cylinder body is influenced, and the integral micro pump cannot work.
In this embodiment, the limiting member 9 includes a first limiting member 91 and a second limiting member 92, the port plate 3 is provided with a first limiting groove 33, the first limiting member 91 is inserted into the first limiting groove 33, the swash plate 6 is provided with a second limiting groove 61, and the second limiting member 92 is inserted into the second limiting groove 61. Through the technical scheme, the limiting piece can stably position the valve plate and the swash plate. In this embodiment, the limiting member 9 is a set screw.
In this embodiment, the pump body 8 is provided with a mounting hole 84, and the limiting member 9 is disposed in the mounting hole 84, so that the limiting member can be fixed on the pump body 8.
It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides a stop limit structure of micropump transmission shaft, micropump includes the transmission shaft, the valve plate, sloping cam plate and the pump body, and the transmission shaft is worn to establish in valve plate and sloping cam plate, its characterized in that, stop limit structure include the locating part, and the locating part setting is on the pump body, and the locating part supports respectively to press valve plate and sloping cam plate, the locating part is located the radial direction of valve plate and sloping cam plate.
2. A stop limit structure for a micro pump transmission shaft according to claim 1, wherein the limit member comprises a first limit member and a second limit member, the port plate is provided with a first limit groove into which the first limit member is inserted, the swash plate is provided with a second limit groove into which the second limit member is inserted.
3. The stop and limit structure of a micro pump drive shaft according to claim 1, wherein the limit member is a set screw.
4. The stop and limit structure of a micro pump transmission shaft according to claim 1, wherein the pump body is provided with a mounting hole, and the limit member is disposed in the mounting hole.
5. The stop limit structure of a transmission shaft of a micro-pump according to claim 1, wherein a first bearing is arranged between the transmission shaft and the port plate, and the first bearing is arranged in a fixing hole of the port plate.
6. The stop limit structure of a micro pump transmission shaft according to claim 1, wherein the pump body is provided with a gland, the gland is in threaded connection with the pump body, and the gland is arranged on one side of the port plate and is located at the tail end of the pump body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922408430.8U CN211370706U (en) | 2019-12-27 | 2019-12-27 | Stop limit structure of micro pump transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922408430.8U CN211370706U (en) | 2019-12-27 | 2019-12-27 | Stop limit structure of micro pump transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211370706U true CN211370706U (en) | 2020-08-28 |
Family
ID=72153774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922408430.8U Active CN211370706U (en) | 2019-12-27 | 2019-12-27 | Stop limit structure of micro pump transmission shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211370706U (en) |
-
2019
- 2019-12-27 CN CN201922408430.8U patent/CN211370706U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202833001U (en) | Swash plate type rotary valve flow distributing pure water plunger pump | |
| CN111396279B (en) | Force balance type two-dimensional plunger pump | |
| CN103883493B (en) | The axial piston pump that a kind of cylinder body is static | |
| CN111059011A (en) | Axial plunger pump | |
| CN201739111U (en) | Inclined disc connecting rod type axial water pressure plunger pump | |
| CN211370706U (en) | Stop limit structure of micro pump transmission shaft | |
| CN111120238A (en) | Floating transmission mechanism and micropump | |
| CN110748468B (en) | High-speed high-pressure axial plunger pump | |
| CN111022426B (en) | Flexibly-supported coaxial-drive high-speed high-pressure connecting rod plunger device | |
| CN210087717U (en) | Telescopic rotary hydraulic cylinder | |
| CN107269520B (en) | Magnetic compensation floating side plate sub-assembly | |
| CN215213791U (en) | Axial plunger pump plunger and axial plunger pump | |
| CN106150955A (en) | Hydraulic axial plunger pump (motor) drive mechanism | |
| CN209621591U (en) | A kind of plunger linking combination | |
| CN108425820A (en) | A kind of cam-type axial piston pump of included slippage pump | |
| CN208221073U (en) | The plunger assembly of axial plunger pump | |
| CN210033747U (en) | Plunger pump | |
| CN104500363B (en) | There is the plunger displacement pump of lubricating system | |
| CN111102259B (en) | Two-dimensional pulse width modulation mechanism | |
| CN201851349U (en) | Novel small control plunger piston of radial plunger pump | |
| CN112539147A (en) | Integrated valve plate and micropump | |
| CN216842076U (en) | Bidirectional high-pressure high-speed axial plunger pump | |
| CN205638826U (en) | Plunger pump | |
| CN104989636A (en) | Port plate of swash plate type plunger pump and motor and matching cylinder body thereof | |
| CN205025701U (en) | No profit pump of rotatory four plungers of curved surface variable high pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.2667, Xinglong Avenue, Yongchuan District, Chongqing 402160 Patentee after: China Shipbuilding Chongqing Hydraulic Electromechanical Co.,Ltd. Address before: No.2667, Xinglong Avenue, Yongchuan District, Chongqing 402160 Patentee before: CSIC CHONGQING HYDRAULIC MECHANICAL-ELECTRONICAL Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |