Improved excavator hydraulic pump cover with interaction force structure

Abstract

The utility model discloses an excavator hydraulic pump pump cover of improved interaction force structure, including pump cover body, the pump cover body is connected through bolt between pump body, the periphery of pump cover body all movably installs the flap, is located the square groove of flap department on the pump cover body, the guide plate of being located square groove inside is fixedly installed on the flap. According to one embodiment of the present disclosure, by setting the flap, the guide plate, the clamping block and the limiting assembly, when the pump cover body is connected on the pump body through the bolt, the staff can make the flaps around the pump cover body gather each other through the limiting assembly, so that the flap moves to the middle part of the pump cover body, and then the clamping block can be inserted into the reserved slot hole on the surface of the pump body, so that when the pump cover body bears the pressure inside the pump body, the clamping block and the flap can share part of the pressure, reduce the interaction force that the bolt and the pump body thread hole receive, thereby avoiding the bolt excessive fatigue service life reduction.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pump cover technology, and more specifically, to an excavator hydraulic pump cover with an improved interaction force structure. Background Technology

[0002] The engine, hydraulic pump, and distribution valve are considered the three core components of an excavator. Unlike the power transmission method in automobiles, excavators are not directly driven by the engine. Instead, the engine drives the hydraulic pump to rotate. The hydraulic pump is responsible for efficiently converting mechanical energy into fluid pressure energy. Common types of hydraulic pumps in excavators include gear pumps and piston pumps. Both types of pumps share the characteristic of applying pressure to fluid by changing its volume. The pump cover on the hydraulic pump serves a sealing function. For example, publication number CN218717447U discloses a hydraulic pump cover plate with a sealing mechanism, including a cover plate body, a connecting sleeve, and a fixing frame. The right end of the cover plate body is provided with... The device includes a connecting sleeve that is fixedly connected to the cover plate body. The cover plate body has a groove on its right end. This invention allows for quick installation of the device and sealing gasket by setting a locking block and a second spring, and by setting a sealing gasket, the sealing performance of the cover plate body connection can be increased. The air groove can increase the connection area between the sealing gasket and the hydraulic pump after connection, further increasing the sealing performance. The buffer plate can contact the hydraulic oil in the hydraulic pump, and the telescopic rod can connect the buffer plate and the pad, so that the first spring and the second spring can absorb the energy on the buffer plate, thereby avoiding damage to the cover plate body due to excessive pressure.

[0003] However, existing technologies have some problems: when the cover plate is connected to the pump body, it is still fixed to the pump body by bolts through the fixing groove on the cover plate. As a result, when the cover plate is subjected to the internal pressure of the pump body, the cover plate and the bolts will be subjected to outward thrust, and the threaded hole on the pump body will be subjected to the tensile force of the bolt threads. The interaction force is large, which can easily cause bolt fatigue and thread wear, thus affecting the connection effect between the cover plate and the pump body. Therefore, we propose an excavator hydraulic pump cover with an improved interaction force structure. Utility Model Content

[0004] One objective of this invention is to provide a new technical solution for an excavator hydraulic pump cover with an improved interaction force structure.

[0005] According to a first aspect of the present invention, an improved interaction force structure for an excavator hydraulic pump cover is provided, comprising a pump cover body, wherein the pump cover body is bolted to a pump body, and folding plates are movably installed around the circumference of the pump cover body. A square groove is provided on the pump cover body at the folding plate, and a guide plate is fixedly installed on the folding plate inside the square groove. A locking block is also fixedly installed on the folding plate, and the other end of the locking block extends into a pre-reserved slot on the surface of the pump body. The folding plate and the pump cover body are also connected by a limiting component, which enables the folding plate and the locking block to remain stable, thereby improving the connection strength between the pump cover body and the pump body.

[0006] Optionally, the limiting component includes a bushing, which is fixedly installed on the pump cover body. A rotating disk is rotatably connected to the outer surface of the bushing, and an arc hole is provided on the rotating disk. A circular block located inside the arc hole is fixedly installed on the folding plate.

[0007] Optionally, the circular block is slidably connected inside the arc hole, and the inner wall of the arc hole is coated with a lubricating layer.

[0008] Optionally, a square plate is fixedly installed on the rotary table, a pin is movably inserted into the square plate, a slot is provided on the bushing, the bottom end of the pin extends into the slot, and a pull handle is fixedly installed on the top of the pin.

[0009] Optionally, a spring is movably sleeved on the outer surface of the pin, and the two ends of the spring are respectively fixedly connected to the square plate and the pull handle.

[0010] Optionally, the pump cover body has an inner groove on the side near the pump body, and the inner groove is annular.

[0011] Optionally, a rubber pad is fixedly installed on the inner wall of the inner groove, and the other end of the rubber pad abuts against the pump body.

[0012] Optionally, a positioning rod is fixedly installed on the side of the pump cover body near the pump body, and the other end of the positioning rod extends into a pre-reserved circular groove on the pump body.

[0013] According to one embodiment of this disclosure, by setting up a folding plate, a guide plate, a locking block, and a limiting component, after the pump cover body is bolted to the pump body, the operator can use the limiting component to make the folding plates around the pump cover body converge with each other. Thus, the folding plates move towards the center of the pump cover body under the guidance of the guide plate, thereby allowing the locking block to be inserted into the pre-reserved slot on the surface of the pump body. Thus, when the pump cover body is subjected to the internal pressure of the pump body, the locking block and the folding plate can share part of the pressure, reduce the interaction force between the bolt and the threaded hole of the pump body, and thus avoid excessive fatigue of the bolt and reduced service life.

[0014] According to one embodiment of this disclosure, by providing a pin, a handle, and a spring, the rotary table can be limited when the bottom of the pin is inserted into the slot. By setting the spring to a stretched state, the pin will tend to move into the slot due to the spring's restoring force, thereby ensuring that the pin is stably inserted into the slot and preventing the rotary table from rotating accidentally and affecting the stability of the folding plate.

[0015] According to one embodiment of this disclosure, by providing an inner groove, a rubber pad, and a positioning rod, and by providing a flange on the pump body that matches the inner groove, the radial force on the bolts can be reduced after the pump cover body is connected to the pump body, thereby further improving the service life of the bolts. When the pump cover body is connected to the pump body, the rubber pad is squeezed, thereby improving the connection sealing between the pump cover body and the pump body, making the sealing effect of the pump cover body on the pump body better. When the pump cover body is installed on the pump body, the pump cover body can be initially positioned by inserting the positioning rod into the reserved circular groove on the pump body, thereby facilitating subsequent installation work.

[0016] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of an excavator hydraulic pump cover with an improved interaction force structure in one embodiment.

[0019] Figure 2 This is a side view of the pump cover of an excavator hydraulic pump according to one embodiment of an improved interaction force structure;

[0020] Figure 3 This is a schematic internal cross-sectional view of the pump cover of an excavator hydraulic pump with an improved interaction force structure in one embodiment.

[0021] Figure 4 This is a schematic diagram of the rotating disc of the pump cover of an excavator hydraulic pump according to one embodiment of an improved interaction force structure;

[0022] Figure 5 This is a schematic diagram of the disassembled structure of the pump cover of an excavator hydraulic pump, which is an improved interaction force structure according to one embodiment.

[0023] The following are marked in the diagram: 1. Pump cover body; 2. Bolt; 3. Folding plate; 4. Square groove; 5. Guide plate; 6. Clamping block; 7. Bushing; 8. Rotary disc; 9. Arc hole; 10. Round block; 11. Square plate; 12. Pin; 13. Slot; 14. Pull handle; 15. Spring; 16. Inner groove; 17. Rubber pad; 18. Positioning rod. Detailed Implementation

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0026] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0027] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0028] like Figures 1-5 As shown, an improved interaction force structure for an excavator hydraulic pump cover includes a pump cover body 1. The pump cover body 1 is connected to the pump body by bolts 2. Folding plates 3 are movably installed around the pump cover body 1. A square groove 4 is opened on the pump cover body 1 at the folding plate 3. A guide plate 5 is fixedly installed on the folding plate 3 inside the square groove 4. A locking block 6 is also fixedly installed on the folding plate 3. The other end of the locking block 6 extends into a pre-reserved slot on the surface of the pump body. The folding plate 3 and the pump cover body 1 are also connected by a limiting component. The limiting component can keep the folding plate 3 and the locking block 6 stable, thereby improving the connection strength between the pump cover body 1 and the pump body.

[0029] When the locking block 6 is located in the pre-reserved slot on the surface of the pump body, it can share the hydraulic pressure borne by the pump cover body 1 and the bolt 2, thereby optimizing the structural influence of the bolt 2 under the interaction of hydraulic pressure and the tensile force of the bolt 2 on the inner wall of the threaded hole on the pump body, improving the service life of the bolt 2. In addition, the operator can quickly disconnect the locking block 6 from the pump body through the limiting component, which facilitates the disassembly of the pump cover body 1.

[0030] The above-mentioned improved interaction force structure of the excavator hydraulic pump cover includes a limiting component including a bushing 7, which is fixedly installed on the pump cover body 1. A rotating disk 8 is rotatably connected to the outer surface of the bushing 7. An arc hole 9 is opened on the rotating disk 8. A round block 10 located inside the arc hole 9 is fixedly installed on the folding plate 3.

[0031] By rotating the rotary disc 8, the inner wall of the arc hole 9 can be pressed against the outer surface of the round block 10, thereby allowing the four folding plates 3 to move closer or further apart. When the four folding plates 3 move closer together, the locking block 6 on the folding plate 3 can be inserted into the slot reserved on the surface of the pump body, thereby further improving the connection strength between the pump cover body 1 and the pump body. When the four folding plates 3 move further apart, the locking block 6 can be pulled out from the slot reserved on the surface of the pump body, making it convenient to disassemble the pump cover body 1 for pump body maintenance.

[0032] In the above-mentioned improved interaction force structure of the excavator hydraulic pump cover, the circular block 10 is slidably connected inside the arc hole 9, and the inner wall of the arc hole 9 is coated with a lubricating layer.

[0033] By coating the inner wall of the arc hole 9 with a lubricating layer, the circular block 10 can slide more smoothly inside the arc hole 9, making it easier for the operator to rotate the rotary table 8.

[0034] The above-mentioned improved interaction force structure of the excavator hydraulic pump cover has a square plate 11 fixedly installed on the rotary table 8, a pin 12 movably inserted into the square plate 11, a slot 13 opened on the bushing 7, the bottom end of the pin 12 extends into the slot 13, and a pull handle 14 is fixedly installed on the top of the pin 12.

[0035] When the bottom of the pin 12 is inserted into the slot 13, it can limit the rotation of the disc 8 and prevent the disc 8 from rotating accidentally and affecting the stability of the folding plate 3. When the disc 8 needs to be rotated, the operator can pull the pin 12 through the handle 14 to pull the bottom of the pin 12 out of the slot 13, thereby releasing the limitation on the disc 8, and then the disc 8 can be rotated to adjust the position of the folding plate 3.

[0036] In the above-mentioned improved interaction force structure of the excavator hydraulic pump cover, a spring 15 is movably sleeved on the outer surface of the pin 12, and the two ends of the spring 15 are respectively fixedly connected to the square plate 11 and the pull handle 14.

[0037] By setting the spring 15 to a stretched state, the spring 15's elasticity will cause the pin 12 to tend to move into the slot 13, thereby enabling the pin 12 to be stably inserted into the slot 13, thus maintaining the limit on the rotating disk 8 and preventing its accidental rotation.

[0038] The above-mentioned improved interaction force structure of the excavator hydraulic pump cover has an inner groove 16 on the side of the pump cover body 1 near the pump body, and the inner groove 16 is annular.

[0039] The pump body is provided with a flange that matches the inner groove 16, so that after the pump cover body 1 is connected to the pump body, the radial force on the bolt 2 can be reduced, thereby further improving the service life of the bolt 2.

[0040] The excavator hydraulic pump cover with the above-mentioned improved interaction force structure has a rubber pad 17 fixedly installed on the inner wall of the inner groove 16, and the other end of the rubber pad 17 abuts against the pump body.

[0041] When the pump cover body 1 is connected to the pump body, the rubber gasket 17 is squeezed, which improves the sealing performance between the pump cover body 1 and the pump body, making the pump cover body 1 better seal the pump body.

[0042] The above-mentioned improved interaction force structure of the excavator hydraulic pump cover has a positioning rod 18 fixedly installed on the side of the pump cover body 1 near the pump body, and the other end of the positioning rod 18 extends into a reserved circular groove on the pump body.

[0043] When the pump cover body 1 is installed onto the pump body, the pump cover body 1 can be initially positioned by inserting the positioning rod 18 into the reserved circular groove on the pump body, which facilitates the subsequent installation work.

[0044] Working principle and usage process of this utility model:

[0045] When installing the pump cover body 1, the positioning rod 18 is inserted into the pre-drilled groove on the pump body to initially position the pump cover body 1. Then, the operator screws the bolts 2 into the threaded holes on the pump body to ensure a tight connection between the pump cover body 1 and the pump body. Next, the rotating disc 8 is rotated. By rotating the disc 8, the inner wall of the arc hole 9 presses against the outer surface of the circular block 10, thereby causing the four folding plates 3 to move together. This allows the locking blocks 6 on the folding plates 3 to engage with the pre-drilled grooves on the surface of the pump body, further improving the connection between the pump cover body 1 and the pump body. With improved connection strength, once the locking block 6 is inserted into place, the pin 12 also rotates with the rotating disk 8 to the position of the slot 13. At this time, due to the restoring effect of the spring 15, the pin 12 will be stably inserted into the slot 13, thereby maintaining the limit on the rotating disk 8 and preventing its accidental rotation. This completes the installation of the pump cover body 1. Thus, when the pump cover body 1 bears the internal pressure of the pump body, the locking block 6 and the folding plate 3 can share part of the pressure, reducing the interaction force between the bolt 2 and the threaded hole of the pump body, thereby avoiding excessive fatigue and reduced service life of the bolt 2.

[0046] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An improved excavator hydraulic pump cover with an improved interaction force structure, comprising a pump cover body (1), wherein the pump cover body (1) is connected to the pump body by bolts (2), characterized in that: The pump cover body (1) is movably mounted with folding plates (3) on all four sides. The pump cover body (1) has a square groove (4) located at the folding plate (3). A guide plate (5) located inside the square groove (4) is fixedly mounted on the folding plate (3). A locking block (6) is also fixedly mounted on the folding plate (3). The other end of the locking block (6) extends into a slot reserved on the surface of the pump body. The folding plate (3) and the pump cover body (1) are also connected by a limiting component. The limiting component can keep the folding plate (3) and the locking block (6) stable, thereby improving the connection strength between the pump cover body (1) and the pump body.

2. The excavator hydraulic pump cover with an improved interaction force structure according to claim 1, characterized in that: The limiting component includes a bushing (7), which is fixedly installed on the pump cover body (1). A rotating disk (8) is rotatably connected to the outer surface of the bushing (7). An arc hole (9) is provided on the rotating disk (8). A round block (10) located inside the arc hole (9) is fixedly installed on the folding plate (3).

3. The excavator hydraulic pump cover with an improved interaction force structure according to claim 2, characterized in that: The circular block (10) is slidably connected inside the arc hole (9), and the inner wall of the arc hole (9) is coated with a lubricating layer.

4. The excavator hydraulic pump cover with an improved interaction force structure according to claim 2, characterized in that: A square plate (11) is fixedly installed on the rotary disc (8), and a pin (12) is movably inserted into the square plate (11). A slot (13) is provided on the bushing (7), and the bottom end of the pin (12) extends into the slot (13). A pull handle (14) is fixedly installed on the top of the pin (12).

5. The excavator hydraulic pump cover with an improved interaction force structure according to claim 4, characterized in that: A spring (15) is movably sleeved on the outer surface of the pin (12), and the two ends of the spring (15) are fixedly connected to the square plate (11) and the handle (14) respectively.

6. The excavator hydraulic pump cover with an improved interaction force structure according to claim 1, characterized in that: The pump cover body (1) has an inner groove (16) on the side near the pump body, and the inner groove (16) is annular.

7. The excavator hydraulic pump cover with an improved interaction force structure according to claim 6, characterized in that: A rubber pad (17) is fixedly installed on the inner wall of the inner groove (16), and the other end of the rubber pad (17) abuts against the pump body.

8. The excavator hydraulic pump cover with an improved interaction force structure according to claim 1, characterized in that: A positioning rod (18) is fixedly installed on the side of the pump cover body (1) near the pump body, and the other end of the positioning rod (18) extends into a pre-reserved circular groove on the pump body.

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