Variable automatic reset mechanism of plunger pump
By adopting a combined structure of double-sided springs and limit plates in the automatic reset mechanism of the plunger pump, the problem of uneven stress caused by traditional single-sided springs is solved, and the structural stability and endurance are improved.
Patent Information
- Application Number
- CN202421639147.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The automatic reset mechanism of traditional plunger pumps usually uses a single-sided spring, which leads to uneven force and is easily damaged when a large force is applied.
A variable automatic reset mechanism of a plunger pump is designed, and a combined structure of a double-sided spring and a limiting plate is adopted. Through the combination of a connecting rod, the first spring bracket, the second spring bracket, the rotating bracket and the limiting plate, the force on both sides of the structure is ensured to be uniform.
Through the design of the double-sided spring, the problem of uneven stress is avoided, the stability and endurance of the reset structure are improved, and damage is prevented when subjected to greater force.
Smart Images
Figure CN222924596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a variable automatic reset mechanism of a plunger pump. Background Art
[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder block to change the volume of the sealed working chamber to achieve oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation. The variable automatic reset mechanism of the plunger pump is an important structure of the plunger pump. The traditional automatic reset mechanism usually uses a single-side spring to achieve the reset function, which will cause problems such as uneven force, and may cause damage to the reset structure when applying a large force. Content of the Utility Model
[0003] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art and provide a variable automatic reset mechanism of a plunger pump.
[0004] A variable automatic reset mechanism of a plunger pump includes a connecting rod, a first spring bracket, a second spring bracket, a rotating bracket, and a limiting piece. The connecting rod sequentially passes through the limiting piece, the first spring bracket, the second spring bracket, and the rotating bracket. Two through holes are provided on the surface of the limiting piece. One through hole is used for sleeving on the connecting rod, and the other through hole is used for a first bolt to pass through and be fixedly connected to the plunger pump housing. Through holes are provided at the centers of the first spring bracket and the second spring bracket. The first spring bracket and the second spring bracket are rotationally sleeved on the connecting rod through the through holes.
[0005] The rotating bracket is fixedly connected to the connecting rod. Springs are provided between the upper end of the first spring bracket and the lower end of the second spring bracket, and between the upper end of the second spring bracket and the lower end of the first spring bracket. First and second tabs are respectively provided on the rotating bracket and the limiting piece. The first and second tabs are respectively located between the upper section of the first spring bracket and the lower section of the second spring bracket or between the upper section of the second spring bracket and the lower section of the first spring bracket. The first tab is used to drive the first spring bracket or the second spring bracket to move, and the second tab is used to limit the movement of the first spring bracket or the second spring bracket.
[0006] Preferably, the first spring bracket is an axisymmetric structure. The first spring bracket includes an upper section, a middle section, and a lower section. The upper section and the lower section have the same structure, both of which are "Z" - shaped structures. The middle section is a straight structure. The two ends of the middle section are respectively connected to one end of the upper section and the lower section. The "Z" - shaped structure includes a first cross bar, a second cross bar, and a vertical bar. The two ends of the vertical bar are respectively connected to one end of the first cross bar and the second cross bar. The first cross bar is used to connect to one end of the spring, and the second cross bar is used to connect to the first tab or the second tab.
[0007] Preferably, the structure of the second spring bracket is the same as that of the first spring bracket.
[0008] Preferably, both the first flap and the second flap are of right-angle bending structure.
[0009] Preferably, hooks are provided at both ends of the spring, and the inner sides of the hooks are connected to the grooves formed on the outer surface of the first cross bar.
[0010] Preferably, the connecting rod is of cylindrical structure, the outer side surface of its front end is a conical arc surface, the front end of the connecting rod is inserted into the conical blind hole, the conical arc surface is connected to the inner side wall of the conical blind hole, the conical blind hole is formed on the surface of the rotating bracket, and the connecting rod and the rotating bracket are locked by the second bolt passing through the bottom of the conical blind hole and the front end face of the connecting rod.
[0011] Preferably, washers are provided between the inner side walls of the limiting piece, the first spring bracket and the second spring bracket and the outer side wall of the connecting rod.
[0012] Beneficial effects: Compared with the prior art, the present utility model adopts a combination of a limiting piece, a spring bracket, a spring and a rotating bracket, making the structure of the reset device simple. The limiting piece and the spring bracket both adopt stamping forming methods, greatly reducing the manufacturing cost. Springs are adopted on both sides, which can ensure uniform force on both sides of the structure and prevent damage when subjected to a large force.
[0013] At the same time, the movement of the first spring bracket and the second spring bracket is controlled by the first flap and the second flap, enabling the movement of the spring bracket to be linked with the rotating bracket. The structure is ingenious and simple, and the cost is low. Description of the Drawings
[0014] Figure 1 is a schematic diagram of the rotating bracket of a variable automatic reset mechanism of a plunger pump in the middle position;
[0015] Figure 2 is a schematic diagram of the structure when the rotating bracket rotates;
[0016] Figure 3 is a cross-sectional view of a variable automatic reset mechanism of a plunger pump;
[0017] In the figure, 1. Rotating bracket, 2. First spring bracket, 3. Second spring bracket, 4. Spring, 5. First flap, 6. Second flap, 7. Limiting piece, 8. First bolt, 9. Second bolt, 10. Connecting rod, 11. Washer. Detailed Embodiment
[0018] In order to deepen the understanding of the present utility model, the present utility model will be further described in detail below in combination with embodiments and drawings. The embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model.
[0019] As Figures 1-3As shown, a rotating bracket 1, a first spring bracket 2, a second spring bracket 3, a spring 4, a first paddle 5, a second paddle 6, a limiting piece 7, a first bolt 8, a second bolt 9, a connecting rod 10, a washer 11;
[0020] A variable automatic reset mechanism of a plunger pump includes a connecting rod 10, a first spring bracket 2, a second spring bracket 3, a rotating bracket 1, and a limiting piece 7. The connecting rod 10 sequentially passes through the limiting piece 7, the first spring bracket 2, the second spring bracket 3, and the rotating bracket 1. Two through holes are provided on the surface of the limiting piece 7. One through hole is used for sleeving on the connecting rod 10, and the other through hole is for the first bolt 8 to pass through and be fixedly connected to the plunger pump housing. Through holes are provided at the centers of the first spring bracket 2 and the second spring bracket 3. The brackets of the first spring 4 and the second spring bracket 3 are rotatably sleeved on the connecting rod 10 through the through holes. Washers 11 are provided between the inner side walls of the limiting piece 7, the first spring bracket 2, and the second spring bracket 3 and the outer side wall of the connecting rod 10;
[0021] The rotating bracket 1 is fixedly connected to the connecting rod 10. The connecting rod 10 is of a cylindrical structure, and the outer side surface of its front end is a conical arc surface. The front end of the connecting rod 10 is inserted into a conical blind hole, and the conical arc surface is connected to the inner side wall of the conical blind hole. The conical blind hole is opened on the surface of the rotating bracket 1. The connecting rod 10 and the rotating bracket 1 are locked by the second bolt 9 passing through the bottom of the conical blind hole and the front end surface of the connecting rod 10.
[0022] It should be noted that washers 11 are respectively installed in the holes where the limiting piece 7 and the spring 4 bracket pass through the connecting rod 10 to reduce friction and wear. The rotating bracket 1 and the connecting rod 10 are finally locked through a taper shaft fit by the second fixing bolt. The taper shaft fit can minimize the gap between the connecting rod 10 and the rotating bracket 1, making the control variable of the plunger pump more accurate.
[0023] The structure of the second spring bracket 3 is the same as that of the first spring bracket 2. Springs 4 are provided between the upper end of the first spring bracket 2 and the lower end of the second spring bracket 3, and between the upper end of the second spring bracket 3 and the lower end of the first spring bracket 2. The first spring bracket 2 is an axisymmetric structure. The first spring bracket 2 includes an upper section, a middle section, and a lower section. Its upper section and lower section have the same structure, both being "Z"-shaped structures. The middle section is a straight structure, and both ends of the middle section are respectively connected to one end of the upper section and the lower section. The "Z"-shaped structure includes a first cross bar, a second cross bar, and a vertical bar. Both ends of the vertical bar are respectively connected to one end of the first cross bar and the second cross bar. The first cross bar is used for connecting to one end of the spring 4. Both the first paddle 5 and the second paddle 6 are right-angled bending structures. The second cross bar is used for connecting to the first paddle 5 or the second paddle 6.
[0024] A first paddle 5 and a second paddle 6 are respectively provided on the rotary bracket 1 and the limit piece 7. Both the first paddle 5 and the second paddle 6 are right-angle bending structures. The first paddle 5 and the second paddle 6 are respectively located between the upper section of the first spring bracket 2 and the lower section of the second spring bracket 3 or between the upper section of the second spring bracket 3 and the lower section of the first spring bracket 2. The first paddle 5 is used to drive the first spring bracket 2 or the second spring bracket 3 to move, and the second paddle 6 is used to limit the movement of the first spring bracket 2 or the second spring bracket 3.
[0025] Instructions for use: During installation, the connecting rod 10 is connected to the variable structure of the plunger pump. The limit piece 7 passes through the connecting rod 10 and is fixed to the plunger pump housing by the first bolt 8. When variable is required, rotate the rotary bracket 1. The first paddle 5 on the rotary bracket 1 drives the first spring bracket 2 and the second spring bracket 3 to rotate. The second paddle 6 on the limit piece 7 hinders the rotation of the first spring bracket 2 and the second spring bracket 3, depending on the specific situation. For the specific movement effects of the spring 4 bracket and the paddle, see Figure 1 、 Figure 2 ;
[0026] When the variable of the plunger pump is not required, the spring will pull the spring bracket to automatically return the rotary bracket to the middle position, thereby driving the connecting rod to rotate and returning the plunger pump to the middle position.
[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A variable automatic reset mechanism for a plunger pump, characterized in that: It includes a connecting rod, a first spring bracket, a second spring bracket, a rotating bracket, and a limiting plate. The connecting rod passes through the limiting plate, the first spring bracket, the second spring bracket, and the rotating bracket in sequence. The limiting plate has two through holes on its surface, one of which is used to be sleeved on the connecting rod, and the other through hole is used for the first bolt to pass through and be fixedly connected to the plunger pump housing. The first spring bracket and the second spring bracket are provided with a through hole at their centers, and the first spring bracket and the second spring bracket are rotatably sleeved on the connecting rod through the through hole. The rotating bracket is fixedly connected to the connecting rod, and springs are provided between the upper end of the first spring bracket and the lower end of the second spring bracket, and between the upper end of the second spring bracket and the lower end of the first spring bracket. The rotating bracket and the limiting plate are respectively provided with a first paddle and a second paddle, and the first paddle and the second paddle are respectively located between the upper section of the first spring bracket and the lower section of the second spring bracket or between the upper section of the second spring bracket and the lower section of the first spring bracket. The first paddle is used to drive the first spring bracket or the second spring bracket to move, and the second paddle is used to limit the movement of the first spring bracket or the second spring bracket.
2. A variable automatic reset mechanism for a plunger pump according to claim 1, characterized in that: The first spring bracket is an axisymmetric structure, and the first spring bracket includes an upper section, a middle section, and a lower section. The upper section and the lower section have the same structure, which is a "Z"-shaped structure. The middle section is a straight structure, and the two ends of the middle section are respectively connected to one end of the upper section and the lower section. The "Z"-shaped structure includes a first cross bar, a second cross bar, and a vertical bar. The two ends of the vertical bar are respectively connected to one end of the first cross bar and the second cross bar. The first cross bar is used to be connected to one end of the spring, and the second cross bar is used to be connected to the first paddle or the second paddle.
3. A variable automatic reset mechanism for a plunger pump according to claim 2, characterized in that: The structure of the second spring bracket is the same as that of the first spring bracket.
4. A variable automatic reset mechanism for a plunger pump according to claim 3, characterized in that: The first paddle and the second paddle are both right-angle bent structures.
5. The variable automatic reset mechanism of a plunger pump according to claim 3, characterized in that: The two ends of the spring are respectively provided with hooks, and the inner sides of the hooks are connected with the grooves provided on the outer surface of the first cross bar.
6. The variable automatic reset mechanism of a plunger pump according to claim 1, characterized in that: The connecting rod is a cylindrical structure, and the outer side surface of its front end is a conical arc surface. The front end of the connecting rod is inserted into the conical blind hole, and the conical arc surface is connected to the inner wall of the conical blind hole. The conical blind hole is opened on the surface of the rotating bracket. The connecting rod and the rotating bracket are locked by a second bolt passing through the bottom of the conical blind hole and the front end surface of the connecting rod.
7. The variable automatic reset mechanism of a plunger pump according to claim 1, characterized in that: Washers are arranged between the inner side walls of the limiting plate, the first spring bracket, the second spring bracket and the outer side wall of the connecting rod.