A hydraulic drive arrangement

Abstract

The utility model discloses a kind of hydraulic drive devices, including central component, the central component is provided with non-parallel pump running surface and motor running surface, and first hydraulic passage and second hydraulic passage;First arc port and second arc port are provided on the pump running surface, third arc port and fourth arc port are provided on the motor running surface;First hydraulic passage is communicated first arc port and third arc port, and second hydraulic passage is communicated second arc port and fourth arc port;In the first hydraulic passage and second hydraulic passage, at least one end of one hydraulic passage extends in the linear direction of angle with motor running surface.Effect in that it is beneficial is as follows: can effectively shorten hydraulic passage path, reduce the volume of central component, make structure more compact;At the same time, the shortening and reasonable layout of hydraulic passage path can reduce fluid efficiency loss, improve transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic braking technology, specifically a hydraulic drive device. Background Technology

[0002] US7065964B2 discloses a central portion of a hydraulic drive device, comprising: a first operating surface including a first pair of arcuate ports formed thereon; a second operating surface perpendicular to the first operating surface and including a second pair of arcuate ports formed thereon; a first system port formed in the central portion and connecting one of the first pair of arcuate ports to one of the second pair of arcuate ports; a second system port formed in the central portion and connecting the other of the first pair of arcuate ports to the other of the second pair of arcuate ports; and a first check valve located in the central portion and connected to the first system port, and a second check valve located in the central portion and connected to the second system port, each check valve including a valve body located in a check valve opening formed on the outer surface of the central portion; wherein at least a portion of at least one system port and the entire body of at least one check valve body are directly below the first operating surface, thereby intersecting the check valve body and a portion of the system port with a line perpendicular to and passing through the first operating surface. At least a portion of the other system port and the entire body of the other check valve body lie directly below the first operating surface, whereby a second line, parallel to the first line and passing through the first operating surface, intersects the other system port and the other check valve body. The orientation of both check valves is approximately perpendicular to the first operating surface.

[0003] A first operating surface includes a first pair of arcuate ports formed thereon; a second operating surface is perpendicular to the first operating surface and includes a second pair of arcuate ports formed thereon; a first system port is formed in a central portion and connects one of the first pair of arcuate ports to one of the second pair of arcuate ports, wherein at least a portion of the first system port is located directly below the first operating surface; a second system port is formed in the central portion and connects the other of the first pair of arcuate ports to the other of the second pair of arcuate ports; a first check valve is connected to the first system port, the first check valve including a first valve body located in a first check valve opening formed on the outer surface of the central portion, wherein at least a portion of the first valve body is directly below one of the first pair of arcuate ports; and a second check valve is connected to the second system port, the second check valve including a second valve body located in a second check valve opening formed on the outer surface of the central portion.

[0004] The aforementioned document discloses a hydraulically driven central component for connecting a pump and a motor. Their orientation can be changed according to the space requirements specified by the vehicle's size and configuration. The central component contains a fluid channel. While minimizing the number of mounting components while ensuring hydraulic transmission, practical applications have revealed that the hydraulic oil path connecting the pump and motor units is too long, reducing transmission efficiency and increasing manufacturing costs, which hinders the widespread application of the product.

[0005] A recently filed patent application, CN120116733A, discloses a hydraulic differential continuously variable transmission (CVT) drive axle. It includes a power input component, a hydraulic base, and two identical drive half-axles symmetrically mounted on the hydraulic base. Each drive half-axle includes a hydraulic motor assembly, a transmission assembly, and a power output assembly. The hydraulic base includes a base body, an internal hydraulic channel formed by drilling, a smooth and straight circular channel, a hydraulic input port, and two hydraulic output ports. The hydraulic input port and hydraulic output ports are connected through a connection within the base body. The power input component is connected to the hydraulic input port, the hydraulic motor assembly is connected to the hydraulic output port, and the hydraulic motor assembly is connected to the power output assembly via the transmission assembly.

[0006] The aforementioned application mentions that the hydraulic channels are formed by drilling. Machining has solved some of the manufacturing problems, but the core issue of low fluid transmission efficiency remains unresolved. Utility Model Content

[0007] The purpose of this invention is to provide a hydraulic drive device with a compact structure that can simultaneously improve fluid transmission efficiency.

[0008] To achieve the above objectives, the basic solution of this utility model provides a hydraulic drive device, including a central component. The central component has a pump operating surface and a motor operating surface that are not parallel to each other, as well as a first hydraulic channel and a second hydraulic channel. The pump operating surface has a first arc-shaped port and a second arc-shaped port, and the motor operating surface has a third arc-shaped port and a fourth arc-shaped port. The first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port. In the first hydraulic channel and the second hydraulic channel, at least one end of the hydraulic channel extends in a straight line direction at an angle to the motor operating surface.

[0009] This utility model also provides another hydraulic drive device, including a central component, on which a pump operating surface and a motor operating surface are provided, which are not parallel to each other, as well as a first hydraulic channel and a second hydraulic channel; a first arc-shaped port and a second arc-shaped port are provided on the pump operating surface, and a third arc-shaped port and a fourth arc-shaped port are provided on the motor operating surface; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; in the first hydraulic channel and the second hydraulic channel, at least one end of the hydraulic channel extends in a straight line direction at an angle to the pump operating surface.

[0010] This utility model also provides a third type of hydraulic drive device, including a central component, on which a pump operating surface and a motor operating surface are provided, which are not parallel to each other, as well as a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; in the first hydraulic channel and the second hydraulic channel, at least one end of the hydraulic channel extends in a straight line direction at an angle to the motor operating surface, and the other end extends in a straight line direction at an angle to the pump operating surface.

[0011] The beneficial effects of the above scheme are as follows: by extending the hydraulic channel in several ways at an angle to the motor running surface, the pump running surface, and the motor running surface and pump running surface, the hydraulic channel path can be effectively shortened, the volume of the central component can be reduced, and the structure can be made more compact; at the same time, the shortening of the hydraulic channel path and the rational layout can reduce fluid efficiency loss and improve transmission efficiency.

[0012] Furthermore, this utility model also provides a fourth hydraulic drive device, including a central component, on which a pump operating surface and a motor operating surface are provided, which are not parallel to each other, as well as a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; characterized in that: in the first hydraulic channel and the second hydraulic channel, at least one of the hydraulic channels is composed of multiple straight channel segments connected together.

[0013] The beneficial effects of this solution are as follows: the hydraulic channel composed of multiple interconnected channel segments can be adapted to a smaller spatial layout, effectively reducing the volume of the central component and making the structure more compact; at the same time, the shortening of the hydraulic channel path and the rational layout can reduce fluid efficiency loss and improve transmission efficiency.

[0014] Preferably, in the above scheme, at least one of the first, second, third, and fourth arc-shaped ports extends one end into the corresponding hydraulic channel, forming an extension that communicates with the hydraulic channel. At the connection point between the arc-shaped port and the hydraulic channel, by extending the port at the connection point into the hydraulic channel to form an extension, fluid flow is smoothly guided, allowing the fluid to enter the hydraulic channel more smoothly, avoiding sudden changes in flow velocity and eddies, effectively reducing fluid resistance and efficiency loss.

[0015] Preferably, the first hydraulic channel and / or the second hydraulic channel are divided into section A and section B; section A is used to accommodate the extension of the connected arc-shaped port, and section B intersects with the connected arc-shaped port. This can effectively improve fluid transfer efficiency and reduce turbulence losses.

[0016] Preferably, the second arc-shaped port and the fourth arc-shaped port are arranged adjacent to each other. This effectively shortens the path of the second hydraulic channel, making the structure more compact, and also effectively reduces fluid transmission losses.

[0017] Preferably, the second arc-shaped port and the third arc-shaped port are arranged adjacent to each other. In a hydraulic environment opposite to the above-mentioned preference, this facilitates the rational arrangement of the two hydraulic channels, making the structure more compact and reducing fluid transmission losses.

[0018] Preferably, the second hydraulic channel is parallel to the motor running surface. This shortens the path of the second hydraulic channel.

[0019] Preferably, the first hydraulic channel and / or the second hydraulic channel are channels formed by machining. Hydraulic channels with good surface quality and smoothness can reduce fluid loss and improve fluid transfer efficiency.

[0020] Preferably, a shaft mounting hole perpendicular to the motor's running surface is provided, and the first hydraulic channel is arranged along one side of the shaft mounting hole and close to the pump's running surface. Placing the first hydraulic channel on one side of the shaft mounting hole improves the compactness of the central component while also increasing the support strength of the shaft mounting hole.

[0021] Preferably, the first hydraulic channel and / or the second hydraulic channel are provided with threaded holes that communicate with the outside.

[0022] This utility model has the following beneficial effects: In the field of hydraulic transmission, this technical solution, through its ingenious arrangement, effectively shortens the fluid path and improves fluid transmission efficiency. The clever arrangement of the hydraulic channels effectively shortens the fluid path, thereby successfully reducing the volume of the central component and making the overall structure more compact. This not only saves space but also better adapts to various application scenarios. Simultaneously, by optimizing the fluid flow path, fluid resistance is greatly reduced, thus significantly minimizing efficiency loss and elevating transmission efficiency to a new level. Furthermore, the technology's process design fully considers ease of manufacturing, effectively reducing production costs while balancing transmission efficiency and structural compactness, achieving a clever balance between performance and cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the pump operating surface structure according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the motor running surface structure according to an embodiment of the present invention.

[0025] Figure 3 This is a cross-sectional view of the first hydraulic channel in an embodiment of the present invention.

[0026] Figure 4 This is a cross-sectional view of the second hydraulic channel in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the motor running surface from another angle according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the pump operating surface structure according to another embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the motor running surface structure according to another embodiment of the present invention.

[0030] Figure 8 This is a cross-sectional view of the first hydraulic channel in another embodiment of the present invention.

[0031] Figure 9 This is a cross-sectional view of the second hydraulic channel in another embodiment of the present invention. Detailed Implementation

[0032] 1. Definitions and Explanations The phrase "at least one end of a hydraulic channel extends in a straight line at an angle to the running surface of the motor" in this utility model mainly refers to the hydraulic channel extending in a direction inclined relative to the running surface of the motor. The specific positional relationship between the two includes the case where the extended line of the center line of the hydraulic channel forms an angle with the running surface of the motor (excluding parallel, perpendicular, and coincident relationships).

[0033] The phrase "at least one end of a hydraulic channel extends in a straight line at an angle to the pump operating surface" in this utility model mainly refers to the hydraulic channel extending in a direction inclined relative to the pump operating surface. The specific positional relationship between the two includes the case where the extension of the center line of the hydraulic channel forms an angle with the pump operating surface (excluding parallel, perpendicular, and coincident relationships).

[0034] The phrase "at least one hydraulic channel extends at one end in a straight line at an angle to the motor running surface and at the other end in a straight line at an angle to the pump running surface" in this utility model refers to the same concept as described above and will not be repeated here.

[0035] The "corresponding" in this utility model refers to the connected.

[0036] 2. Existing and well-known technologies In the hydraulic drive systems of small vehicles such as ride-on lawnmowers, the key to the coordinated operation of the hydraulic pump unit and the hydraulic motor unit lies in the efficient transmission of hydraulic oil through the hydraulic oil channels. As the "lifeline" for hydraulic oil transport, the processing quality and transmission efficiency of the hydraulic oil channels directly affect the performance of the entire hydraulic drive system. From a manufacturing perspective, hydraulic oil passages require extremely high precision. Taking the surface roughness of the passage's inner wall as an example, if the surface is too rough, the hydraulic oil will experience greater frictional resistance during flow, increasing energy loss and potentially leading to higher oil temperature, thus affecting the hydraulic oil's performance and lifespan. With the development of precision machining technology, advanced processes such as electrical discharge machining (EDM) and laser machining are increasingly being applied to hydraulic oil passage processing. EDM can precisely control the electrodes to produce complex-shaped, high-precision oil passages, effectively reducing surface roughness. Laser machining utilizes the thermal effect of a high-energy laser beam to rapidly melt and vaporize materials, achieving high-precision oil passage processing while also reducing stress deformation during the process. In terms of transmission efficiency, the design and layout of hydraulic passages play a decisive role. Inappropriate passage length, bending angles, and cross-sectional shapes all increase the flow resistance of hydraulic oil, leading to increased pressure loss and reduced transmission efficiency. For example, excessively long passages or excessive bends can cause eddies and turbulence in the hydraulic oil during flow, consuming a significant amount of energy. To improve transmission efficiency, the passage design needs to be optimized. Adopting a short and straight passage layout, reducing unnecessary bends and turns, can lower the flow resistance of the hydraulic oil. Appropriately selecting the cross-sectional shape of the passages, such as a circular cross-section which has a lower flow resistance coefficient than other shapes, helps to increase the flow velocity and flow rate of the hydraulic oil. Furthermore, applying an anti-friction coating inside the passages can effectively reduce friction between the hydraulic oil and the passage's inner wall, further improving transmission efficiency. In conclusion, the design, machining, and transmission efficiency of hydraulic oil passages have a crucial impact on the performance of the hydraulic drive system of a ride-on lawnmower. Only through reasonable machining techniques and optimized oil passage design can the machining quality and transmission efficiency of hydraulic oil passages be effectively improved, thereby enhancing the reliability and working efficiency of the entire hydraulic drive system.

[0037] To meet the above requirements, this utility model provides a hydraulic drive device, which will be further described in detail below through specific embodiments.

[0038] 3. Examples and Descriptions The instruction manual includes Figure 1-9 The reference numerals in the figures include: 1-pump running surface, 11-first arc-shaped port, 12-second arc-shaped port, 2-motor running surface, 11-third arc-shaped port, 12-fourth arc-shaped port, 23-shaft mounting hole, 3-first hydraulic channel, and 4-second hydraulic channel.

[0039] This embodiment provides a hydraulic drive device, including a central component, on which a pump running surface 1 and a motor running surface 2 are provided, which are not parallel to each other, as well as a first hydraulic channel 3 and a second hydraulic channel 4; the pump running surface 1 is provided with a first arc-shaped port 11 and a second arc-shaped port 12, and the motor running surface 2 is provided with a third arc-shaped port 21 and a fourth arc-shaped port 22; the first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0040] In the first hydraulic channel 3 and the second hydraulic channel 4, at least one end of the hydraulic channel extends in a straight direction at an angle to the motor running surface 2. This includes embodiments where one end of the first hydraulic channel 3 extends in a direction at an angle to the motor running surface 2, i.e., the first hydraulic channel 3 is inclined; the other two embodiments are where one end of the second hydraulic channel 4 extends in a direction at an angle to the motor running surface 2, i.e., the second hydraulic channel 4 is inclined; and embodiments where both the first hydraulic channel 3 and the second hydraulic channel 4 extend in a direction at an angle to the motor running surface 2, i.e., both hydraulic channels are inclined.

[0041] This embodiment provides another hydraulic drive device, including a central component, on which a pump running surface 1 and a motor running surface 2, which are not parallel to each other, are provided, as well as a first hydraulic channel 3 and a second hydraulic channel 4; the pump running surface 1 is provided with a first arc-shaped port 11 and a second arc-shaped port 12, and the motor running surface 2 is provided with a third arc-shaped port 21 and a fourth arc-shaped port 22; the first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0042] In the first hydraulic channel 3 and the second hydraulic channel 4, at least one end of the hydraulic channel extends in a straight direction at an angle to the pump operating surface 1. This includes embodiments where one end of the first hydraulic channel 3 extends in a direction at an angle to the pump operating surface 1, i.e., the first hydraulic channel 3 is inclined; the other two embodiments are where one end of the second hydraulic channel 4 extends in a direction at an angle to the pump operating surface 1, i.e., the second hydraulic channel 4 is inclined; and embodiments where both the first hydraulic channel 3 and the second hydraulic channel 4 extend in a direction at an angle to the pump operating surface 1, i.e., both hydraulic channels are inclined.

[0043] This embodiment provides a third type of hydraulic drive device, including a central component, on which a pump running surface 1 and a motor running surface 2 are provided, which are not parallel to each other, as well as a first hydraulic channel 3 and a second hydraulic channel 4; the pump running surface 1 is provided with a first arc-shaped port 11 and a second arc-shaped port 12, and the motor running surface 2 is provided with a third arc-shaped port 21 and a fourth arc-shaped port 22; the first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0044] In the first hydraulic channel 3 and the second hydraulic channel 4, at least one end of the hydraulic channel extends in a straight direction at an angle to the pump operating surface 1, and the other end extends in a straight direction at an angle to the motor operating surface 2. This includes two embodiments: one where one end of the first hydraulic channel 3 extends in a direction at an angle to the pump operating surface 1, and the other end extends in a direction at an angle to the motor operating surface 2, i.e., the inclined hydraulic channel (the extension of the center line) is at an angle to both operating surfaces in space; the other two embodiments are: one end of the second hydraulic channel 4 extends in a direction at an angle to the pump operating surface 1, and the other end extends in a direction at an angle to the motor operating surface 2, i.e., the second hydraulic channel 4 is inclined; and the other embodiments are: one end of the first hydraulic channel 3 extends in a direction at an angle to the pump operating surface 1, and the other end extends in a direction at an angle to the motor operating surface 2, and one end of the second hydraulic channel 4 extends in a direction at an angle to the pump operating surface 1, and the other end extends in a direction at an angle to the motor operating surface 2, i.e., both the first hydraulic channel 3 and the second hydraulic channel 4 are inclined at an angle to both operating surfaces.

[0045] This embodiment provides a fourth type of hydraulic drive device, including a central component, on which a pump operating surface 1 and a motor operating surface 2 are provided, which are not parallel to each other, as well as a first hydraulic channel 3 and a second hydraulic channel 4; the pump operating surface 1 is provided with a first arc-shaped port 11 and a second arc-shaped port 12, and the motor operating surface 2 is provided with a third arc-shaped port 21 and a fourth arc-shaped port 22; the first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22; in the first hydraulic channel and the second hydraulic channel, at least one of the hydraulic channels is composed of multiple straight channel segments connected together.

[0046] Even better, within the same hydraulic channel segment, at least two adjacent segments intersect to form a bend. That is, when fluid enters an adjacent channel segment from one segment, the main flow direction changes.

[0047] Based on the first, second, and third types of first hydraulic drive devices, it is even better that hydraulic channel 3 and / or second hydraulic channel 4 are straight channels.

[0048] In this embodiment, at least one of the arc-shaped ports 11, 12, 21, and 22 extends into the corresponding hydraulic channel at one end, forming an extension that communicates with the hydraulic channel. In this embodiment, "corresponding" refers to being connected to the corresponding hydraulic channel. For example, in one implementation, one end of the arc-shaped port 11 extends into the first hydraulic channel 3, forming an extension that communicates with the first hydraulic channel 3. When the extension and the first hydraulic channel 3 are projected from a direction perpendicular to the pump operating surface 1, the projections of the extension and the first hydraulic channel 3 overlap. Preferably, the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​the first hydraulic channel 3.

[0049] Better still, the first hydraulic channel 3 and / or the second hydraulic channel 4 are divided into segment A and segment B; segment A is used to accommodate the extension of the corresponding arc-shaped port, and segment B intersects with the arc-shaped port connected to it.

[0050] Better still, the first hydraulic channel 3 and / or the second hydraulic channel 4 are channels formed by machining.

[0051] Better still, the first hydraulic passage and / or the second hydraulic passage are provided with an opening or hole that communicates with the outside; the inside of the hole may be provided with threads for fitting a plug or pressure relief valve.

[0052] Example 1: The first implementation method provided in this embodiment is as follows: Figure 1 , 2The hydraulic drive device shown in Figure 5 includes a central component, on which a pump running surface 1 and a motor running surface 2 are provided. The two running surfaces are preferably arranged perpendicular to each other, but they can also be arranged to adapt to other application scenarios. As long as they are not parallel, the purpose of this utility model can be achieved.

[0053] like Figure 3 , 4 As shown, a first hydraulic channel 3 and a second hydraulic channel 4 are provided on the central component; preferably, the two hydraulic channels are straight channels, and the cross-section can preferably be circular or elliptical.

[0054] In this embodiment, as Figure 1 As shown, two arc-shaped ports are provided on the pump operating surface 1, namely the first arc-shaped port 11 and the second arc-shaped port 12. The first arc-shaped port 11 and the second arc-shaped port 12 are not connected, and the two arc-shaped ports are arranged facing each other around the center point of the pump operating surface 1.

[0055] like Figure 2 As shown, two arc-shaped ports are also provided on the motor running surface 2, namely the third arc-shaped port 21 and the fourth arc-shaped port 22. The third arc-shaped port 21 and the fourth arc-shaped port 22 are not connected and are arranged facing each other around the center line of the motor running surface 2.

[0056] The first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0057] like Figure 1 , 2 The second arc-shaped port 12 and the fourth arc-shaped port 22 are arranged adjacent to each other. That is, the distance from the second arc-shaped port 12 to the fourth arc-shaped port 22 is less than the distance from the second arc-shaped port 12 to the third arc-shaped port 21, and also less than the distance from the first arc-shaped port 11 to the third arc-shaped port 21.

[0058] Preferably, the second hydraulic channel 4 is parallel to the motor running surface 2.

[0059] Even better, the second hydraulic channel 4 is parallel not only to the motor operating surface 2 but also to the pump operating surface 1. This is equivalent to the second hydraulic channel 4 being parallel to both operating surfaces, which can minimize the channel path, making the structure more compact and improving fluid transfer efficiency.

[0060] like Figure 3 As shown, preferably, one end of the first hydraulic channel 3 extends in a direction that is at an angle to the motor running surface 2. In this embodiment, the angle can preferably be an acute angle. Specifically, the angle between the extension of the center line of the first hydraulic channel 3 and the motor running surface 2 is α, where 0° < α < 90°.

[0061] Overall, the first hydraulic channel is inclined at 30%, with each end connected to an arc-shaped port. This design minimizes the fluid path, reduces fluid resistance, and increases transmission efficiency.

[0062] Of course, the second hydraulic channel 4 can also be set in such an inclined manner, or both the first hydraulic channel 3 and the second hydraulic channel 4 can be set in an inclined manner.

[0063] Better, such as Figure 3 , 4 As shown, both the first hydraulic channel 3 and the second hydraulic channel 4 are designed to be divided into sections A and B. For the first hydraulic channel 3, section A connects to the first arc-shaped port 11. One end of the first arc-shaped port 11 extends inward toward section A, forming an extension that connects to section A. The maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​section A. Section B intersects and connects to the third arc-shaped port 21. For the second hydraulic channel 4, section A connects to the second arc-shaped port 12. One end of the second arc-shaped port 12 extends inward toward section A, forming an extension that connects to section A. The maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​section A. Section B intersects and connects to the fourth arc-shaped port 22. This embodiment provides an implementation where both the first hydraulic channel 3 and the second hydraulic channel 4 are divided into sections A and B. The purpose of this invention can also be achieved if a single channel is implemented using sections A and B.

[0064] In this embodiment, an opening or hole communicating with the outside is provided at the end of section B of the first hydraulic channel 3 and the end of section A of the second hydraulic channel 4; more preferably, a thread can be provided on the inner wall of the hole for use with a plug or pressure relief valve.

[0065] Among these, machining is the preferred method for processing hydraulic channels. Machining is relatively convenient, and it also improves the quality of the inner wall of the hydraulic channels (such as surface finish), thus better reducing fluid efficiency losses.

[0066] Furthermore, a shaft mounting hole 23 is provided on the motor running surface 2, and the axis of the shaft mounting hole 23 is perpendicular to the motor running surface 2. The first hydraulic passage 3 is arranged along one side of the shaft mounting hole 23 and close to the pump running surface 1.

[0067] This embodiment also provides another specific implementation method: like Figure 6 , 7 The hydraulic drive device shown includes a central component, on which a pump running surface 1 and a motor running surface 2 are provided. The two running surfaces are preferably arranged perpendicular to each other, but they can also be arranged to adapt to other application scenarios. As long as they are not parallel, the purpose of this utility model can be achieved.

[0068] like Figure 3 ,4 As shown, a first hydraulic channel 3 and a second hydraulic channel 4 are provided on the central component; preferably, the two hydraulic channels are straight channels, and the cross-section can preferably be circular or elliptical.

[0069] In this embodiment, as Figure 6 As shown, two arc-shaped ports are provided on the pump operating surface 1, namely the first arc-shaped port 11 and the second arc-shaped port 12. The first arc-shaped port 11 and the second arc-shaped port 12 are not connected, and the two arc-shaped ports are arranged facing each other around the center point of the pump operating surface 1. like Figure 7 As shown, two arc-shaped ports are also provided on the motor running surface 2, namely the third arc-shaped port 21 and the fourth arc-shaped port 22. The third arc-shaped port 21 and the fourth arc-shaped port 22 are not connected and are arranged facing each other around the center line of the motor running surface 2.

[0070] The first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0071] like Figure 6 , 7 As shown, the second arc-shaped port 12 and the third arc-shaped port 21 are arranged adjacent to each other. That is, the distance from the second arc-shaped port 12 to the third arc-shaped port 21 is less than the distance from the second arc-shaped port 12 to the fourth arc-shaped port 22.

[0072] Preferably, the second hydraulic channel 4 is parallel to the motor running surface 2.

[0073] Even better, the second hydraulic channel 4 is parallel not only to the motor operating surface 2, but also to the pump operating surface 1. This is equivalent to the second hydraulic channel 4 being parallel to both operating surfaces, which can minimize the channel path, make the structure more compact, and improve fluid transfer efficiency.

[0074] like Figure 8 As shown, preferably, one end of the first hydraulic channel 3 extends in a direction that is at an angle to the motor running surface 2. In this embodiment, the angle can preferably be an acute angle. Specifically, the angle between the extension of the center line of the first hydraulic channel 3 and the motor running surface 2 is α, where 0° < α < 90°.

[0075] Overall, the first hydraulic channel is inclined at 30%, with each end connected to an arc-shaped port. This design minimizes the fluid path, reduces fluid resistance, and increases transmission efficiency.

[0076] Of course, the second hydraulic channel 4 can also be set in such an inclined manner, or both the first hydraulic channel 3 and the second hydraulic channel 4 can be set in an inclined manner.

[0077] like Figure 8 , 9 As shown, preferably, both the first hydraulic channel 3 and the second hydraulic channel 4 are designed to be divided into segments A and B. For the first hydraulic channel 3, segment A connects to the first arc-shaped port 11, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the third arc-shaped port 21. For the second hydraulic channel 4, segment A connects to the second arc-shaped port 12, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the fourth arc-shaped port 22. This embodiment provides a implementation where both the first hydraulic channel 3 and the second hydraulic channel 4 are segmented. The purpose of this invention can also be achieved if a single channel uses segments A and B.

[0078] In this hydraulic channel, the central axes of segments A and B coincide. Segments A and B can be channels with equal diameters, meaning their cross-sectional areas are equal, or they can be channels with varying diameters, such as segment A having a larger or smaller cross-sectional area than segment B.

[0079] In this embodiment, an opening or hole communicating with the outside is provided at the end of section B of the first hydraulic channel 3 and the end of section A of the second hydraulic channel 4; more preferably, a thread can be provided on the inner wall of the hole for use with a plug or pressure relief valve.

[0080] Among these, machining is the preferred method for processing the hydraulic channels. Machining is relatively convenient, and it also results in better quality of the inner wall of the hydraulic channels, thus reducing fluid efficiency loss.

[0081] Furthermore, a shaft mounting hole 23 is provided on the motor running surface 2, and the axis of the shaft mounting hole 23 is perpendicular to the motor running surface 2. The first hydraulic passage 3 is arranged along one side of the shaft mounting hole 23 and close to the pump running surface 1.

[0082] Example 2: The difference between this embodiment and embodiment 1 is that one end of the first hydraulic channel 3 does not extend in a direction that is at an angle to the motor running surface 2, but extends in a direction that is at an angle to the pump running surface 1.

[0083] Example 3: The difference between this embodiment and embodiment 1 is that one end of the first hydraulic channel 3 extends in a direction that is at an angle to the pump operating surface 1, and the other end extends in a direction that is at an angle to the motor operating surface 2.

[0084] As a further preferred embodiment, the second hydraulic channel 4 can be extended at an angle to both the pump operating surface 1 and the motor operating surface 2.

[0085] Example 4: The first implementation method provided in this embodiment is as follows: Figure 1 , 2 The hydraulic drive device shown in Figure 5 includes a central component, on which a pump running surface 1 and a motor running surface 2 are provided. The two running surfaces are preferably arranged perpendicular to each other, but they can also be arranged to adapt to other application scenarios. As long as they are not parallel, the purpose of this utility model can be achieved.

[0086] The central component is provided with a first hydraulic channel 3 and a second hydraulic channel 4; wherein the first hydraulic channel 3 is composed of multiple channel segments connected end to end and interconnected with each other.

[0087] Even better, in the channel segments that make up the same hydraulic channel, two adjacent channel segments intersect to form a bend, that is, the first hydraulic channel 3 is a hydraulic channel with a bend, and the main direction of the fluid changes at least once during the flow of the fluid through the first hydraulic channel 3; preferably, each channel segment is a straight channel, and the cross-section can preferably be circular or elliptical.

[0088] In this embodiment, as Figure 1 As shown, two arc-shaped ports are provided on the pump operating surface 1, namely the first arc-shaped port 11 and the second arc-shaped port 12. The first arc-shaped port 11 and the second arc-shaped port 12 are not connected, and the two arc-shaped ports are arranged facing each other around the center point of the pump operating surface 1.

[0089] like Figure 2 As shown, two arc-shaped ports are also provided on the motor running surface 2, namely the third arc-shaped port 21 and the fourth arc-shaped port 22. The third arc-shaped port 21 and the fourth arc-shaped port 22 are not connected and are arranged facing each other around the center line of the motor running surface 2.

[0090] The first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0091] like Figure 1 , 2 The second arc-shaped port 12 and the fourth arc-shaped port 22 are arranged adjacent to each other. That is, the distance from the second arc-shaped port 12 to the fourth arc-shaped port 22 is less than the distance from the second arc-shaped port 12 to the third arc-shaped port 21, and also less than the distance from the first arc-shaped port 11 to the third arc-shaped port 21.

[0092] Preferably, the second hydraulic channel 4 is parallel to the motor running surface 2.

[0093] Even better, the second hydraulic channel 4 is parallel not only to the motor operating surface 2 but also to the pump operating surface 1. This is equivalent to the second hydraulic channel 4 being parallel to both operating surfaces, which can minimize the channel path, making the structure more compact and improving fluid transfer efficiency.

[0094] Alternatively, one end of the second hydraulic channel 4 may extend in a direction that forms an angle with the motor running surface 2 and / or the pump running surface 1. In this embodiment, the angle may preferably be an acute angle. Specifically, the angle between the extension of the center line of the second hydraulic channel 4 and the motor running surface 2 and / or the pump running surface 1 is α, where 0° < α < 90°.

[0095] Even better, both the first hydraulic channel 3 and the second hydraulic channel 4 are designed to be divided into segments A and B. For the first hydraulic channel 3, segment A connects to the first arc-shaped port 11, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the third arc-shaped port 21. For the second hydraulic channel 4, segment A connects to the second arc-shaped port 12, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the fourth arc-shaped port 22. This embodiment provides an implementation where both the first hydraulic channel 3 and the second hydraulic channel 4 are divided into segments A and B. However, the purpose of this invention can also be achieved if a single channel is implemented using segments A and B.

[0096] In this embodiment, in the first hydraulic channel 3 and the second hydraulic channel 4, the front end of section A and the end of section B are both provided with openings or holes that connect to the outside; more preferably, threads can be provided on the inner wall of the hole for use with plugs or pressure relief valves.

[0097] Among these, machining is the preferred method for processing hydraulic channels. Machining is relatively convenient, and it also improves the quality of the inner wall of the hydraulic channels (such as surface finish), thus better reducing fluid efficiency losses.

[0098] Furthermore, a shaft mounting hole 23 is provided on the motor running surface 2, and the axis of the shaft mounting hole 23 is perpendicular to the motor running surface 2. The first hydraulic passage 3 is arranged along one side of the shaft mounting hole 23 and close to the pump running surface 1.

[0099] This embodiment also provides another specific implementation method: like Figure 6 , 7 The hydraulic drive device shown includes a central component, on which a pump running surface 1 and a motor running surface 2 are provided. The two running surfaces are preferably arranged perpendicular to each other, but they can also be arranged to adapt to other application scenarios. As long as they are not parallel, the purpose of this utility model can be achieved.

[0100] The central component is provided with a first hydraulic channel 3 and a second hydraulic channel 4; wherein the first hydraulic channel 3 is composed of multiple channel segments connected end to end and interconnected with each other, and at least two adjacent channel segments intersect to form a bend, that is, the first hydraulic channel 3 is a hydraulic channel with bends, and the main direction of the fluid changes at least once during the flow of the fluid through the first hydraulic channel 3; preferably, each channel segment is a straight channel, and the cross-section can preferably be circular or elliptical.

[0101] In this embodiment, as Figure 6 As shown, two arc-shaped ports are provided on the pump operating surface 1, namely the first arc-shaped port 11 and the second arc-shaped port 12. The first arc-shaped port 11 and the second arc-shaped port 12 are not connected, and the two arc-shaped ports are arranged facing each other around the center point of the pump operating surface 1. like Figure 7 As shown, two arc-shaped ports are also provided on the motor running surface 2, namely the third arc-shaped port 21 and the fourth arc-shaped port 22. The third arc-shaped port 21 and the fourth arc-shaped port 22 are not connected and are arranged facing each other around the center line of the motor running surface 2.

[0102] The first hydraulic channel 3 connects the first arc-shaped port 11 and the third arc-shaped port 21, and the second hydraulic channel 4 connects the second arc-shaped port 12 and the fourth arc-shaped port 22.

[0103] like Figure 6 , 7 As shown, the second arc-shaped port 12 and the third arc-shaped port 21 are arranged adjacent to each other. That is, the distance from the second arc-shaped port 12 to the third arc-shaped port 21 is less than the distance from the second arc-shaped port 12 to the fourth arc-shaped port 22.

[0104] Preferably, the second hydraulic channel 4 is parallel to the motor running surface 2.

[0105] Even better, the second hydraulic channel 4 is parallel not only to the motor operating surface 2, but also to the pump operating surface 1. This is equivalent to the second hydraulic channel 4 being parallel to both operating surfaces, which can minimize the channel path, make the structure more compact, and improve fluid transfer efficiency.

[0106] Alternatively, one end of the second hydraulic channel 4 may extend in a direction that forms an angle with the motor running surface 2 and / or the pump running surface 1. In this embodiment, the angle may preferably be an acute angle. Specifically, the angle between the extension of the center line of the second hydraulic channel 4 and the motor running surface 2 and / or the pump running surface 1 is α, where 0° < α < 90°.

[0107] Better still, both the first hydraulic channel 3 and the second hydraulic channel 4 are designed to be divided into segments A and B. For the first hydraulic channel 3, segment A connects to the first arc-shaped port 11, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the third arc-shaped port 21. For the second hydraulic channel 4, segment A connects to the second arc-shaped port 12, one end of which extends inward toward segment A to form an extension communicating with segment A, and the maximum cross-sectional area of ​​the extension is smaller than the cross-sectional area of ​​segment A. Segment B intersects and connects with the fourth arc-shaped port 22. This embodiment provides a method where both the first hydraulic channel 3 and the second hydraulic channel 4 are segmented. However, the purpose of this invention can also be achieved if a single channel uses a segmented A and B configuration.

[0108] In this hydraulic channel, the central axes of segments A and B coincide. Segments A and B can be channels with equal diameters, meaning the cross-sectional areas of the two segments are equal, or they can be channels with varying diameters, such as the cross-sectional area of ​​segment A being greater than or less than that of segment B.

[0109] In this embodiment, in the first hydraulic channel 3 and the second hydraulic channel 4, the front end of section A and the end of section B are both provided with openings or holes that connect to the outside; more preferably, threads can be provided on the inner wall of the hole for use with plugs or pressure relief valves.

[0110] Among these, machining is the preferred method for processing the hydraulic channels. Machining is relatively convenient, and it also improves the quality of the inner wall of the hydraulic channels, thus reducing fluid efficiency losses.

[0111] Furthermore, a shaft mounting hole 23 is provided on the motor running surface 2, and the axis of the shaft mounting hole 23 is perpendicular to the motor running surface 2. The first hydraulic passage 3 is arranged along one side of the shaft mounting hole 23 and close to the pump running surface 1.

[0112] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A hydraulic drive device, comprising a central component, wherein the central component is provided with a pump operating surface and a motor operating surface that are not parallel to each other, and a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; characterized in that: In the first hydraulic channel and the second hydraulic channel, at least one end of the hydraulic channel extends in a straight direction at an angle to the running surface of the motor.

2. A hydraulic drive device, comprising a central component, wherein the central component is provided with a pump operating surface and a motor operating surface that are not parallel to each other, and a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; characterized in that: In the first hydraulic passage and the second hydraulic passage, at least one end of the hydraulic passage extends in a straight direction at an angle to the pump operating surface.

3. A hydraulic drive device, comprising a central component, wherein the central component is provided with a pump operating surface and a motor operating surface that are not parallel to each other, and a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; characterized in that: In the first hydraulic passage and the second hydraulic passage, at least one end of the hydraulic passage extends in a straight direction at an angle to the motor running surface, and the other end extends in a straight direction at an angle to the pump running surface.

4. A hydraulic drive device, comprising a central component, wherein the central component is provided with a pump operating surface and a motor operating surface that are not parallel to each other, and a first hydraulic channel and a second hydraulic channel; the pump operating surface is provided with a first arc-shaped port and a second arc-shaped port, and the motor operating surface is provided with a third arc-shaped port and a fourth arc-shaped port; the first hydraulic channel connects the first arc-shaped port and the third arc-shaped port, and the second hydraulic channel connects the second arc-shaped port and the fourth arc-shaped port; characterized in that: In the first hydraulic channel and the second hydraulic channel, at least one of the hydraulic channels is composed of multiple connected straight channel segments.

5. The hydraulic drive device according to any one of claims 1-4, characterized in that: In the first arc-shaped port, the second arc-shaped port, the third arc-shaped port, and the fourth arc-shaped port, at least one of the arc-shaped ports extends one end toward the corresponding hydraulic channel and forms an extension that communicates with the hydraulic channel.

6. The hydraulic drive device according to claim 5, characterized in that: The first hydraulic channel and / or the second hydraulic channel are divided into segment A and segment B; segment A is used to accommodate the extension of the connected arc-shaped port, and segment B intersects with the connected arc-shaped port.

7. The hydraulic drive device according to claim 6, characterized in that: The second arc-shaped port and the fourth arc-shaped port are arranged adjacent to each other.

8. The hydraulic drive device according to claim 6, characterized in that: The second arc-shaped port and the third arc-shaped port are arranged adjacent to each other.

9. The hydraulic drive device according to claim 7 or 8, characterized in that: The second hydraulic channel is parallel to the motor running surface.

10. The hydraulic drive device according to claim 9, characterized in that: The first hydraulic channel and / or the second hydraulic channel are channels formed by machining.

11. The hydraulic drive device according to claim 10, characterized in that: The motor running surface is provided with a shaft mounting hole perpendicular to it, and the first hydraulic channel is arranged along one side of the shaft mounting hole and close to the pump running surface.

12. The hydraulic drive device according to any one of claims 1-4, 6-8, 10, and 11, characterized in that: A threaded hole communicating with the outside is provided on the first hydraulic channel and / or the second hydraulic channel.

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