Hydraulic differential stepless speed change drive axle and vehicle

Abstract

The utility model relates to a vehicle driving structure, in particular to a hydraulic differential stepless speed change drive axle. Comprising a power input assembly, a hydraulic base and two driving half bridges which are symmetrically arranged on the hydraulic base and are the same in structure, and each driving half bridge comprises a hydraulic motor assembly, a transmission assembly and a power output assembly. The hydraulic base comprises a base body, a hydraulic channel in the hydraulic base is a circular channel which is formed by drilling and has a smooth and straight inner wall, a hydraulic input port and two hydraulic output ports, and the hydraulic input port and the hydraulic output ports are communicated through the interior of the base body; the power input assembly is connected with the hydraulic input port, the hydraulic motor assembly is connected with the hydraulic output port, and the hydraulic motor assembly is connected with the power output assembly through the transmission assembly. According to the hydraulic differential stepless speed change drive axle adopting the scheme, self-adaptive differential drive is achieved by controlling the hydraulic pressure of a single vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drive structure and vehicle, concretely relates to a kind of hydraulic differential stepless variable speed drive axle and a kind of vehicle with this drive axle. BACKGROUND

[0002] The differential in the stepless variable speed drive axle in prior art is the differential of two sides wheel differential turning by planetary gear set, and the differential of this mechanical structure is more complex, needs more parts in production and assembly process, and assembly process is more complex, and the differential of planetary gear set structure is easy to wear.

[0003] And, the vehicle with the differential of mechanical structure planetary gear set, one of the wheels is easy to produce skidding idling condition in turning process, influence normal driving of vehicle. SUMMARY

[0004] The utility model intends to provide a kind of hydraulic differential stepless variable speed drive axle for realizing differential function by hydraulic structure.

[0005] The hydraulic differential stepless variable speed drive axle in the scheme, including a power input component, a hydraulic base and two identical drive half-axles being symmetrically arranged on the hydraulic base, the drive half-axle includes a hydraulic motor assembly, a transmission assembly and a power output component, the hydraulic base includes a base body, the hydraulic channel in its interior is formed by drilling processing, the smooth and straight inner wall of circular channel, a hydraulic input port and two hydraulic output ports, the hydraulic input port and the hydraulic output port are communicated by the hydraulic channel in the base body, which is formed by drilling processing, the smooth and straight inner wall of circular channel;The power input component is connected with the hydraulic input port, the hydraulic motor assembly is connected with the hydraulic output, and the hydraulic motor assembly is connected with the power output component by the transmission assembly.

[0006] The utility model has the advantages that: the characteristics of hydraulic are utilized in the scheme, the hydraulic of one side is reduced, the hydraulic of the other side is naturally increased, differential is realized, and the complex mechanical planetary gear structure in prior art is saved.Adaptive differential drive is realized by controlling single vehicle hydraulic.

[0007] Further, the base body is N-shaped structure, the hydraulic input port is arranged on the top of the base body, and the two hydraulic output ports are arranged on the two outer side end faces of the base body respectively.

[0008] Further, the hydraulic motor assembly is connected with the base body by motor shaft.

[0009] Furthermore, the transmission assembly includes a primary driving gear, a primary driven gear, a secondary driving gear, and a secondary driven gear. The motor shaft passes through the side wall of the base body. One end of the motor shaft is outside the base body and is used to connect to the hydraulic motor assembly. The other end is between the two side walls of the base body and is used to fix the primary driving gear. The primary driving gear meshes with the primary driven gear, the primary driven gear meshes with the secondary driven gear, and the secondary driven gear is connected to a power output assembly.

[0010] Furthermore, the hydraulic motor assembly includes a hydraulic motor and a hydraulic motor swashplate base. The hydraulic motor is sleeved on a motor shaft and its end face is connected to the hydraulic input port. The motor shaft end outside the hydraulic motor is located inside the hydraulic motor swashplate base.

[0011] Furthermore, the power input assembly includes an input shaft, a hydraulic pump, and a hydraulic pump displacement and flow direction adjustment base. The input shaft is rotatably mounted on the base body, and the hydraulic pump and the hydraulic pump displacement and flow direction adjustment base are mounted on the input shaft. The hydraulic pump is attached to the hydraulic input port, and the hydraulic pump displacement and flow direction adjustment base is mounted on the hydraulic pump.

[0012] Furthermore, the power input component is a half-shaft, one end of which is fixedly connected to the center hole of the primary driven gear, and the other end of which is the power output end.

[0013] Furthermore, the fixed ends of both half-shafts pass through the central hole of the primary driven tooth and are close to each other. Both fixed ends of the two half-shafts are provided with external teeth, and a differential lock is provided on the external teeth of one of the half-shafts. The differential lock can slide on the external teeth of the two half-shafts.

[0014] Furthermore, the primary driven tooth and the secondary driving tooth are concentrically fixed, and the primary driven tooth and the secondary driving tooth of the two sets of driving sub-bridges are located on the same fixed shaft.

[0015] One type of vehicle in this solution includes the aforementioned hydraulic differential continuously variable transmission drive axle. Attached Figure Description

[0016] Figure 1 This is a perspective view of a hydraulic differential continuously variable transmission drive axle according to the present invention.

[0017] Figure 2 This is a bottom view of a hydraulic differential continuously variable transmission drive axle according to this utility model.

[0018] Figure 3 This is a perspective view of the hydraulic base in this utility model;

[0019] Figure 4This is a front view of the hydraulic base in this utility model;

[0020] Figure 5 for Figure 4 Sectional view of AA;

[0021] Figure 6 for Figure 4 A cross-sectional view of BB. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] according to Figures 1 to 6 As shown, a hydraulic differential continuously variable transmission drive axle includes a power input component, a hydraulic base 1, and two identical drive half-axles symmetrically mounted on the hydraulic base 1. See details... Figure 3 The hydraulic base 1 includes a base body 1-1, a hydraulic channel inside the base body 1-1, a hydraulic input port 1-3, and two hydraulic output ports 1-4. The base body 1-1 has an N-type structure. The hydraulic input port 1-3 is located at the top of the base body 1-1, and the two hydraulic output ports 1-4 are respectively located on the two outer end faces of the base body 1-1. The hydraulic channel inside the base body 1-1 is a circular channel 1-2 with a smooth and straight inner wall formed by drilling.

[0024] See details Figures 4-6 The hydraulic input port 1-3 and the hydraulic output port 1-4 are connected by a hydraulic channel 1-2 inside the base body 1-1, which is a circular channel 1-2 with a smooth and straight inner wall formed by drilling. The hydraulic channel 1-2 includes a horizontal flow channel 21 and a vertical flow channel 22. The horizontal flow channel 21 is located at the top horizontal part of the N-shaped structure, and the vertical flow channel 22 is located at the two vertical parts on both sides of the N-shaped structure. The hydraulic input port 1-3 is located at the horizontal flow channel 21, and the hydraulic output port 1-4 is located at the vertical flow channel 22.

[0025] See details Figure 1 , Figure 2 The power input component is connected to hydraulic input ports 1-3, the hydraulic motor component is connected to hydraulic output ports 1-4, and the hydraulic motor component is connected to the power output component through the transmission component.

[0026] In this embodiment, the power input component includes an input shaft 9, a hydraulic pump 10, and a hydraulic pump displacement and flow direction adjustment base 11. The input shaft 9 is rotatably mounted on the base body 1-1. The hydraulic pump 10 and the hydraulic pump displacement and flow direction adjustment base 11 are mounted on the input shaft 9. The hydraulic pump 10 is in contact with the hydraulic input port 1-3, and the hydraulic pump displacement and flow direction adjustment base 11 is mounted on the hydraulic pump 10.

[0027] The drive half-bridge includes a hydraulic motor assembly, a transmission assembly and a power output assembly. The hydraulic motor assembly is connected to the base body 1-1 via a motor shaft 2.

[0028] The transmission assembly includes a primary driving gear 3, a primary driven gear 4, a secondary driving gear 5, and a secondary driven gear 6. The motor shaft 2 passes through the side wall of the base body 1-1. One end of the motor shaft 2 is outside the base body 1-1 and is used to connect the hydraulic motor assembly. The other end is between the two side walls of the base body 1-1 and is used to fix the primary driving gear 3. The primary driving gear 3 meshes with the primary driven gear 4, the primary driven gear 4 meshes with the secondary driven gear 6, and the secondary driven gear 6 is connected to a power output assembly.

[0029] The primary driven gear 4 and the secondary driving gear 5 are two concentrically fixed gears with large and small outer diameters, used to reduce speed and increase torque. The primary driven gear 4 and the secondary driving gear 5 of the two sets of drive bridges are set on the same fixed shaft to keep the speed of both sides synchronized.

[0030] Specifically, the hydraulic motor assembly includes a hydraulic motor 7 and a hydraulic motor swashplate base 8. The hydraulic motor 7 is mounted on a motor shaft 2 and its end face is connected to the hydraulic input port 1-3. The end of the motor shaft 2 outside the hydraulic motor 7 is located inside the hydraulic motor swashplate base 8.

[0031] In this embodiment, the power input component is a half shaft 12. One end of the half shaft 12 is fixedly connected to the center hole of the primary driven gear 4, and the other end of the half shaft 12 is the power output end.

[0032] As a further improvement to this embodiment, the fixed ends of both half-shafts 12 pass through the center hole of the primary driven gear 4 and are close to each other. Both fixed ends of the two half-shafts 12 are provided with external teeth, and a differential lock 13 is provided on the external teeth of one of the half-shafts 12. The differential lock 13 can slide on the external teeth of both half-shafts 12. The differential lock 13 is provided between the two half-shafts 12 to prevent freewheeling and tire slippage.

[0033] A vehicle comprising the aforementioned hydraulic differential continuously variable transmission drive axle.

[0034] 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 differential continuously variable transmission drive axle, characterized in that: The device includes a power input component, a hydraulic base (1), and two identical drive half-bridges symmetrically arranged on the hydraulic base (1). The drive half-bridges include a hydraulic motor assembly, a transmission assembly, and a power output assembly. The hydraulic base (1) includes a base body (1-1), a hydraulic channel inside which is a circular channel (1-2) with a smooth and straight inner wall formed by drilling, a hydraulic input port (1-3), and two hydraulic output ports (1-4). The hydraulic input port (1-3) and the hydraulic output port (1-4) are connected through the circular channel (1-2) with a smooth and straight inner wall formed by drilling within the base body (1-1). The power input component is connected to the hydraulic input port (1-3), the hydraulic motor assembly is connected to the hydraulic output port (1-4), and the hydraulic motor assembly is connected to the power output assembly through the transmission assembly.

2. The hydraulic differential continuously variable transmission drive axle according to claim 1, characterized in that: The base body (1-1) has an N-type structure. The hydraulic input port (1-3) is located on the top of the base body (1-1), and the two hydraulic output ports (1-4) are respectively located on the two outer end faces of the base body (1-1).

3. A hydraulic differential continuously variable transmission drive axle according to claim 1 or 2, characterized in that: The hydraulic motor assembly is connected to the base body (1-1) via a motor shaft (2).

4. The hydraulic differential continuously variable transmission drive axle according to claim 3, characterized in that: The transmission assembly includes a primary driving gear (3), a primary driven gear (4), a secondary driving gear (5), and a secondary driven gear (6). The motor shaft (2) passes through the side wall of the base body (1-1). One end of the motor shaft (2) is outside the base body (1-1) and is used to connect the hydraulic motor assembly. The other end is between the two side walls of the base body (1-1) and is used to fix the primary driving gear (3). The primary driving gear (3) meshes with the primary driven gear (4). The primary driven gear (4) meshes with the secondary driven gear (6). The secondary driven gear (6) is connected to a power output assembly.

5. A hydraulic differential continuously variable transmission drive axle according to claim 3, characterized in that: The hydraulic motor assembly includes a hydraulic motor (7) and a hydraulic motor swashplate base (8). The hydraulic motor (7) is sleeved on a motor shaft (2) and its end face is connected to the hydraulic input port (1-3). The end of the motor shaft (2) outside the hydraulic motor (7) is located inside the hydraulic motor swashplate base (8).

6. A hydraulic differential continuously variable transmission drive axle according to claim 1, characterized in that: The power input assembly includes an input shaft (9), a hydraulic pump (10), and a hydraulic pump displacement and flow direction adjustment base (11). The input shaft (9) is rotatably mounted on the base body (1-1). The hydraulic pump (10) and the hydraulic pump displacement and flow direction adjustment base (11) are mounted on the input shaft (9). The hydraulic pump (10) is attached to the hydraulic input port (1-3), and the hydraulic pump displacement and flow direction adjustment base (11) is mounted on the hydraulic pump (10).

7. A hydraulic differential continuously variable transmission drive axle according to claim 4, characterized in that: The power input component is a half shaft (12), one end of which is fixedly connected to the center hole of the primary driven gear (4), and the other end of which is the power output end.

8. A hydraulic differential continuously variable transmission drive axle according to claim 7, characterized in that: The fixed ends of the two half-shafts (12) pass through the center hole of the primary driven tooth (4) and are close to each other. The fixed ends of the two half-shafts (12) are provided with external teeth. A differential lock (13) is provided on the external teeth of one of the half-shafts (12). The differential lock (13) can slide on the external teeth of the two half-shafts (12).

9. A hydraulic differential continuously variable transmission drive axle according to claim 4, characterized in that: The primary driven tooth (4) and the secondary driving tooth (5) are concentrically fixed, and the primary driven tooth (4) and the secondary driving tooth (5) of the two sets of driving sub-bridges are located on the same fixed shaft.

10. A vehicle, characterized in that: Including a hydraulic differential continuously variable transmission drive axle as described in any one of claims 1 to 9.

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