CN209818229U - Hydraulic connecting mechanism - Google Patents
Hydraulic connecting mechanism Download PDFInfo
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- CN209818229U CN209818229U CN201920632606.5U CN201920632606U CN209818229U CN 209818229 U CN209818229 U CN 209818229U CN 201920632606 U CN201920632606 U CN 201920632606U CN 209818229 U CN209818229 U CN 209818229U
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- piston rod
- ball
- annular groove
- inner annular
- conical surface
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Abstract
The utility model discloses a hydraulic connecting mechanism, including sloping cam plate (1) and piston rod (2), be equipped with the installation cavity on sloping cam plate (1), the installation cavity comprises notch (16), inner annular groove (14) and ball socket (13), have two symmetric distribution and cross-section for semicircular first cambered surface (11) on the lateral wall of inner annular groove (14), link to each other through two first planes (12) between two first cambered surfaces (11) and become the circularity, the bottom surface of inner annular groove (14) is connected with ball socket (13), the top surface of inner annular groove (14) links to each other with notch (16); the end part of the piston rod (2) is provided with a ball head (21) positioned in the mounting cavity, the ball head (21) is in ball joint with the ball socket (13), the middle part of the ball head (21) is provided with a first conical surface (22), and the first conical surface (22) is connected with the side wall of the piston rod (2) through a second conical surface (23). The utility model has the advantages of the subassembly assembly is simple, subassembly processing cycle is short and with low costs.
Description
Technical Field
The utility model belongs to the coupling mechanism field of piston rod and sloping cam plate among the variable plunger pump especially relates to a hydraulic pressure coupling mechanism.
Background
The variable displacement piston pump is internally provided with an assembly consisting of a swash plate and a piston rod, and the connecting structure between the piston rod and the swash plate comprises a threaded connection and a ball hinge. When the piston rod is in threaded connection with the swash plate, the piston rod is only required to be turned with threads during processing, and a threaded hole is formed in the corresponding position of the swash plate, so that the processing procedures are few, the processing is easy, but the piston rod cannot rotate around the swash plate and axially move, the assembly is easy to over-position during assembly, the assembly is difficult to install into a variable displacement plunger pump, and the problem of difficult assembly of the assembly is solved; when connecting with ball pivot between piston rod and the sloping cam plate, because the piston rod can rotate around the sloping cam plate, be difficult to appear the location during the subassembly assembly, pack into behind the subassembly in the variable plunger pump easily, but there is the problem of processing difficulty, at first need process out the bulb on the piston rod, then need process out the binding off that allows the piston rod to pass on the sloping cam plate, the inboard processing of binding off and bulb complex installation cavity, the complexity of processing is high, the manufacturing procedure that involves is many, processing cycle is very long, and the machining dimension of binding off is difficult to guarantee, the bulb is difficult to the tight fit to pass the binding off when binding off the undersize and packs into the installation cavity, when binding off too big, the bulb is thrown off from the installation cavity easily, piston rod and sloping cam plate take place the separation, so size precision to the binding off department requires extremely high, lead to the processing qualification. Therefore, the existing connecting structure for the connection between the swash plate and the piston rod has the defects of difficult assembly of components or long processing period and high cost of the components.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic pressure coupling mechanism. The utility model has the advantages of the subassembly assembly is simple, subassembly processing cycle is short and with low costs.
The technical scheme of the utility model: a hydraulic connecting mechanism comprises a swash plate and a piston rod, wherein an installation cavity is arranged on the swash plate and consists of a notch, an inner annular groove and a ball socket which are respectively positioned at the top, the middle and the bottom of the installation cavity; the end part of the piston rod is provided with a ball head positioned in the mounting cavity, the ball head is hinged with the ball socket ball, the middle part of the ball head is provided with a first conical surface, and the first conical surface is connected with the side wall of the piston rod through a second conical surface.
In the hydraulic connection mechanism, an included angle of 30-60 ° is formed between the top surface of the inner annular groove and the central axis of the inner annular groove.
In the hydraulic connection mechanism, an included angle of 45 ° is formed between the top surface of the inner annular groove and the central axis of the inner annular groove.
In the hydraulic connection mechanism, an oil through hole connected with the ball socket is formed in the piston rod. The oil through hole is used for introducing oil in the variable plunger pump into the ball socket.
In the hydraulic connection mechanism, an oil storage hole connected with the oil through hole is formed in the bottom surface of the ball socket.
Compared with the prior art, the utility model discloses a do the improvement on current ball articulated connection structure's basis, improve one and lie in changing the shape of installation cavity, improve two and lie in changing the shape of bulb. After improvement, the piston rod can freely rotate around the swash plate, the assembly is not easy to over-position during assembly, the assembly is easy to be installed in the variable displacement plunger pump, and assembly is simple. The piston rod just can pack into the installation cavity after inclining great angle very easily, and the machining precision requirement to the installation cavity is low, does not need the precision of multichannel manufacturing procedure guarantee installation cavity, and the complexity of processing is low, and processing cycle is shorter, and the notch (being equivalent to prior art's binding off) machining precision requirement is low, and the size is guaranteed easily, can not scrap because of the notch size is inaccurate and lead to the sloping cam plate, has improved the processing qualification rate of sloping cam plate, has reduced the cost of subassembly. Therefore, the utility model has the advantages of the subassembly assembly is simple, subassembly processing cycle is short and with low costs.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a front view of the piston chamber.
Fig. 3 is a view from direction K of fig. 2.
Fig. 4 is a schematic view of the structure of the plunger.
The labels in the figures are: 1-a swash plate, 2-a piston rod, 11-a first cambered surface, 12-a first plane, 13-a ball socket, 14-an inner ring groove, 15-an oil storage hole, 16-a notch, 21-a ball head, 22-a first conical surface, 23-a second conical surface and 24-an oil through hole.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. A hydraulic connecting mechanism comprises a swash plate 1 and a piston rod 2, wherein a mounting cavity is arranged on the swash plate 1 and consists of notches 16, an inner annular groove 14 and a ball socket 13 which are respectively positioned at the top, the middle and the bottom of the mounting cavity, two first arc surfaces 11 which are symmetrically distributed and have semicircular sections are arranged on the side wall of the inner annular groove 14, the two first arc surfaces 11 are connected into a ring through two first planes 12, the bottom surface of the inner annular groove 14 is connected with the ball socket 13, and the top surface of the inner annular groove 14 is connected with the notches 16; the end of the piston rod 2 is provided with a ball head 21 positioned in the mounting cavity, the ball head 21 is in ball joint with the ball socket 13, the middle of the ball head 21 is provided with a first conical surface 22, the diameter of the end, facing the piston rod 2, of the first conical surface 22 is larger than that of the end, facing the ball head 21, of the first conical surface 22, the axis of the first conical surface 22 is overlapped with that of the piston rod 2, the first conical surface 22 is connected with the side wall of the piston rod 2 through a second conical surface 23, and the diameter of the end, facing the ball head 21, of the.
The top surface of the inner ring groove 14 and the central axis of the inner ring groove 14 form an included angle A of 45 degrees.
An oil through hole 24 connected with the ball socket 13 is arranged in the piston rod 2. The other end of the oil through hole 24 is communicated with a variable piston of a variable plunger pump, and oil in the pump is communicated through a through hole in the variable piston, such as the variable plunger pump of model A10VO52/53 series.
An oil storage hole 15 connected with an oil through hole 24 is formed in the bottom surface of the ball socket 13.
The cross-section of the inner ring groove 14 is larger than the cross-section of the slot opening 16. Further, two symmetrical center planes of the inner ring groove 14 and two symmetrical center planes of the notch 16 are overlapped in pairs, and an intersection line formed between the two symmetrical center planes of the inner ring groove 4 is overlapped with the axis of the oil storage hole 15. The cross section of the inner ring groove 14 and the shape of the notch 16 are similar to an ellipse, the length of the cross section of the inner ring groove 14 is b2, the width of the cross section of the inner ring groove 14 is a2, and the radius of an arc line on the cross section of the inner ring groove 14 is R1; the length of the cross section of the notch 16 is b1, the width of the cross section of the notch 16 is a1, and the arc radius of the cross section of the notch 16 is R. The satisfied relationship is: b2> b1, a2> a 1. The joint of the first conical surface 22 and the second conical surface 23 is the position of the maximum cross section of the ball head 21, the maximum cross section of the ball head 21 is perpendicular to the piston rod 2, and the maximum cross section diameter D, b1 and D of the ball head 21 is greater than a1, so that the piston rod 2 must be inclined to a larger angle to be loaded when the ball head 21 is loaded into the installation cavity, and when the included angle between the piston rod 2 and the central axis of the installation cavity is smaller (when the variable displacement plunger pump works, the maximum included angle between the piston rod 2 and the central axis of the installation cavity also belongs to a smaller included angle), the ball head 21 cannot be separated from the swash plate after being loaded into; meanwhile, a2> D > a1, so that the ball head 21 can be installed in the installation cavity, after the spherical surface of the ball head 21 is attached to the ball socket 13, the piston rod 2 can swing in the installation cavity by taking the ball socket 13 as a fulcrum, and when the piston rod 2 is coaxial with the central axis of the installation cavity, the piston rod 2 cannot be pulled out of the installation cavity.
The utility model has the advantages of the subassembly assembly is simple, subassembly processing cycle is short and with low costs.
Claims (5)
1. A hydraulic coupling mechanism characterized by: the swash plate comprises a swash plate (1) and a piston rod (2), wherein a mounting cavity is arranged on the swash plate (1), the mounting cavity consists of notches (16) which are respectively positioned at the top, the middle and the bottom of the mounting cavity, an inner annular groove (14) and a ball socket (13), two first arc surfaces (11) which are symmetrically distributed and have semicircular sections are arranged on the side wall of the inner annular groove (14), the two first arc surfaces (11) are connected into a ring through two first planes (12), the bottom surface of the inner annular groove (14) is connected with the ball socket (13), and the top surface of the inner annular groove (14) is connected with the notches (16); the end part of the piston rod (2) is provided with a ball head (21) positioned in the mounting cavity, the ball head (21) is in ball joint with the ball socket (13), the middle part of the ball head (21) is provided with a first conical surface (22), and the first conical surface (22) is connected with the side wall of the piston rod (2) through a second conical surface (23).
2. The hydraulic coupling mechanism of claim 1, wherein: the top surface of the inner ring groove (14) and the central axis of the inner ring groove (14) form an included angle of 30-60 degrees.
3. The hydraulic coupling mechanism of claim 1, wherein: and an included angle of 45 degrees is formed between the top surface of the inner ring groove (14) and the central axis of the inner ring groove (14).
4. The hydraulic coupling mechanism of claim 1, wherein: an oil through hole (24) connected with the ball socket (13) is arranged in the piston rod (2).
5. The hydraulic linkage of claim 4, wherein: and an oil storage hole (15) connected with the oil through hole (24) is formed in the bottom surface of the ball socket (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920632606.5U CN209818229U (en) | 2019-05-06 | 2019-05-06 | Hydraulic connecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920632606.5U CN209818229U (en) | 2019-05-06 | 2019-05-06 | Hydraulic connecting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818229U true CN209818229U (en) | 2019-12-20 |
Family
ID=68882641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920632606.5U Active CN209818229U (en) | 2019-05-06 | 2019-05-06 | Hydraulic connecting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237151A (en) * | 2020-03-21 | 2020-06-05 | 哈尔滨工程大学 | Axial plunger pump sliding shoe with surface texture |
-
2019
- 2019-05-06 CN CN201920632606.5U patent/CN209818229U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237151A (en) * | 2020-03-21 | 2020-06-05 | 哈尔滨工程大学 | Axial plunger pump sliding shoe with surface texture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Liyuan Hydraulic Co.,Ltd. Assignor: AVIC LIYUAN HYDRAULIC Co.,Ltd. Contract record no.: X2023520000031 Denomination of utility model: A hydraulic connection mechanism Granted publication date: 20191220 License type: Exclusive License Record date: 20230626 |