Plunger pump gearbox for four-wheel steering loader

Abstract

The plunger pump gearbox comprises a gearbox body and a conjoined torque converter shell which are fixedly connected, a hydraulic torque converter is installed in the conjoined torque converter shell, a turbine shaft is arranged in the hydraulic torque converter in a penetrating mode, a pump opening driving gear is installed on the turbine shaft, and the pump opening driving gear is connected with the pump opening driving gear. The pump opening driving gear is sequentially in transmission connection with the idle wheel and the pump opening driven gear, and the pump opening driving gear, the idle wheel and the pump opening driven gear are all located in the connected torque converter shell. The pump opening driven gear is installed on a pump sleeve, the pump sleeve penetrates through the gearbox body and the conjoined torque converter shell, pump openings are formed in the two ends of the pump sleeve, and plunger pumps are installed outside the pump openings in the gearbox body. According to the plunger pump gearbox provided by the utility model, the position of the pump opening can be adjusted to the gearbox body from the torque converter shell, and the plunger pump is arranged on the gearbox body, so that the appearance of the whole gearbox is reduced, and the layout of a vehicle is facilitated.

Description

Technical Field

[0001] The utility model relates to a plunger pump gearbox for a four-wheel steering loader, belonging to the technical field of engineering machinery speed change devices. Background Art

[0002] The torque converter and transmission work together in the transmission system to achieve power transmission and speed change. The torque converter is primarily responsible for transmitting torque between the engine and transmission, changing torque, shifting speeds, and engaging clutches. The transmission, on the other hand, achieves speed and torque changes through hydraulic transmission and a combination of gears. They each play a unique role, but together they ensure the proper functioning of the transmission system.

[0003] Patent No. CN201520633275.9 discloses a new structure of a hydraulic torque converter for a small loader gearbox. The hydraulic torque converter housing is provided with a pump port connected to a plunger pump, and the pump sleeve rotates to drive the plunger pump outside the pump port to work.

[0004] With respect to the technical solutions disclosed in the above patent documents, it is believed that the following technical problems still exist in practice:

[0005] The pump port is located on the torque converter housing, so the plunger pump needs to be installed on the torque converter housing, which will cause the entire transmission device to have larger dimensions and is not conducive to vehicle layout.

[0006] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0007] In response to the deficiencies in the background technology, the utility model provides a plunger pump gearbox for a four-wheel steering loader. The pump port position can be adjusted from the torque converter housing to the gearbox body, and the plunger pump is installed on the gearbox body, so that the entire transmission device is smaller in size, which is beneficial to the vehicle layout.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A plunger pump gearbox for a four-wheel steering loader comprises a fixedly connected gearbox body and a conjoined torque converter housing; a hydraulic torque converter is mounted within the conjoined torque converter housing, a turbine shaft is passed through the hydraulic torque converter, a pump port driving gear is mounted on the turbine shaft, the pump port driving gear is sequentially connected to an idler gear and a pump port driven gear, the pump port driving gear, the idler gear and the pump port driven gear are all located within the conjoined torque converter housing; the pump port driven gear is mounted on a pump sleeve, which passes through the gearbox body and the conjoined torque converter housing; pump ports are provided at both ends of the pump sleeve, and a plunger pump is mounted outside the pump port on the gearbox body.

[0010] Furthermore, the output end of the turbine shaft extends into the gearbox body, and an input gear is installed on the output end of the turbine shaft.

[0011] Furthermore, a forward clutch shaft, a reverse clutch shaft, an intermediate shaft and an output shaft are installed inside the transmission case and are sequentially connected in transmission.

[0012] Furthermore, the intermediate shaft is equipped with a first gear and a second gear, and both the first gear and the second gear are connected to the intermediate shaft via splines.

[0013] Furthermore, the reverse clutch shaft is equipped with a hub gear that meshes with the first gear for transmission.

[0014] Furthermore, a high-speed output gear and a low-speed output gear are rotatably mounted on the output shaft. The high-speed output gear is meshed with the first gear for transmission, and the low-speed output gear is meshed with the second gear for transmission.

[0015] Furthermore, an engaging sleeve is provided between the high-speed output gear and the low-speed output gear, and the engaging sleeve is connected to the shift fork mechanism.

[0016] Furthermore, output flanges are installed on both ends of the output shaft.

[0017] Compared with the prior art, the present invention has the following advantages after adopting the above technical solution:

[0018] The pump port driving gear in the utility model transmits power to the idler gear, the pump port driven gear and the pump sleeve in sequence. The pump sleeve is set through the gearbox body and the integrated torque converter housing. Pump ports are provided at both ends of the pump sleeve. A plunger pump is installed outside the pump port on the gearbox body.

[0019] The utility model adjusts the pump port position from the torque converter housing to the transmission case, and installs the plunger pump on the transmission case, so that the entire transmission device is smaller in size, which is beneficial to the vehicle layout;

[0020] The utility model changes the double pump sleeve structure in the prior art into a single pump sleeve structure, and can optimize the layout space of the torque converter, thereby reducing the cost.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a transmission principle diagram of the present utility model.

[0023] In the figure, 1-transmission body, 2-connected torque converter housing, 3-torque converter, 4-turbine shaft, 5-pump port driving gear, 6-idler gear, 7-pump sleeve, 8-pump port driven gear, 9-input gear, 10-forward clutch shaft, 11-reverse clutch shaft, 12-intermediate shaft, 13-output shaft, 14-disc hub gear, 15-first gear, 16-second gear, 17-high-speed output gear, 18-low-speed output gear, 19-meshing sleeve, 20-output flange. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the utility model provides a plunger pump gearbox for a four-wheel steering loader, comprising a gearbox body 1 and a connected torque converter housing 2 that are fixedly connected.

[0026] The integrated torque converter housing 2 houses a hydraulic torque converter 3, which is penetrated by a turbine shaft 4. The output end of the turbine shaft 4 extends into the transmission case 1, and an input gear 9 is mounted on the output end of the turbine shaft 4. The hydraulic torque converter 3 transmits power to the transmission case 1.

[0027] A pump port driving gear 5 is installed on the turbine shaft 4, and the pump port driving gear 5 is sequentially connected to the idler gear 6 and the pump port driven gear 8. The pump port driving gear 5, the idler gear 6 and the pump port driven gear 8 are all located inside the integrated torque converter housing 2.

[0028] The pump port driven gear 8 is mounted on the pump sleeve 7 , and the pump sleeve 7 is arranged through the transmission case 1 and the integral torque converter housing 2 .

[0029] Both ends of the pump sleeve 7 are provided with pump ports, one pump port is located on the gearbox body 1 and the other is located on the integrated torque converter housing 2, wherein a plunger pump is installed outside the pump port on the gearbox body 1.

[0030] The transmission case 1 is internally mounted with a forward clutch shaft 10 , a reverse clutch shaft 11 , an intermediate shaft 12 and an output shaft 13 which are sequentially connected in transmission.

[0031] The specific structure of the forward clutch shaft 10, the reverse clutch shaft 11 and the components installed thereon belongs to the prior art and has been disclosed in Patent Publication No. CN201621194987.6, so it will not be described in detail in this application.

[0032] The intermediate shaft 12 is equipped with a first gear 15 and a second gear 16 , and the first gear 15 and the second gear 16 are both connected to the intermediate shaft 12 via splines.

[0033] The reverse clutch shaft 11 is equipped with a hub gear 14 that meshes with the first gear 15 for transmission.

[0034] A high-speed output gear 17 and a low-speed output gear 18 are rotatably mounted on the output shaft 13 . The high-speed output gear 17 is meshed with the first gear 15 for transmission, and the low-speed output gear 18 is meshed with the second gear 16 for transmission.

[0035] A meshing sleeve 19 is provided between the high-speed output gear 17 and the low-speed output gear 18. The meshing sleeve 19 is connected to the fork mechanism. The fork mechanism can drive the meshing sleeve 19 to move left and right along the output shaft 13, so that the meshing sleeve 19 is meshed with the high-speed output gear 17 or the low-speed output gear 18.

[0036] Output flanges 20 are mounted on both ends of the output shaft 13 .

[0037] The specific working principle of this utility model:

[0038] The engine power is input into the transmission case 1 through the turbine shaft 4 after the torque is increased and the pitch is changed by the torque converter 3 , and then passes through a series of transmissions in the transmission case 1 and is finally output from the transmission case 1 through the output flanges 20 at both ends of the output shaft 13 .

[0039] The output shaft 13 has a high-speed and low-speed switching function. When the engaging sleeve 19 engages with the high-speed output gear 17, high speed is output through the output flanges 20 at both ends of the output shaft 13. When the engaging sleeve 19 engages with the low-speed output gear 18, low speed is output through the output flanges 20 at both ends of the output shaft 13.

[0040] The pump port driving gear 5 in the present invention transmits power to the idler gear 6, the pump port driven gear 8 and the pump sleeve 7 in sequence, and then transmits power to the plunger pump through the pump port on the gearbox body 1.

[0041] The above description is merely an example of the preferred embodiment of the present invention. Any details not described in detail are common knowledge within the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A plunger pump gearbox for a four-wheel steering loader, characterized by: The invention comprises a transmission case (1) and a conjoined torque converter case (2) which are fixedly connected; a hydraulic torque converter (3) is installed inside the conjoined torque converter case (2); a turbine shaft (4) is passed through the hydraulic torque converter (3); a pump port driving gear (5) is installed on the turbine shaft (4); the pump port driving gear (5) is sequentially connected to an idler gear (6) and a pump port driven gear (8); the pump port driving gear (5), the idler gear (6) and the pump port driven gear (8) are all located inside the conjoined torque converter case (2); the pump port driven gear (8) is installed on a pump sleeve (7), and the pump sleeve (7) passes through the transmission case (1) and the conjoined torque converter case (2); pump ports are provided at both ends of the pump sleeve (7), and a plunger pump is installed outside the pump port on the transmission case (1).

2. The plunger pump gearbox for a four-wheel steering loader according to claim 1, characterized in that: The output end of the turbine shaft (4) extends into the gearbox body (1), and an input gear (9) is mounted on the output end of the turbine shaft (4).

3. The plunger pump gearbox for a four-wheel steering loader according to claim 1, characterized in that: A forward gear clutch shaft (10), a reverse gear clutch shaft (11), an intermediate shaft (12), and an output shaft (13) are installed inside the transmission case (1) and are sequentially connected in transmission.

4. The plunger pump gearbox for a four-wheel steering loader according to claim 3, characterized in that: The intermediate shaft (12) is equipped with a first gear (15) and a second gear (16), and the first gear (15) and the second gear (16) are both connected to the intermediate shaft (12) via splines.

5. The plunger pump gearbox for a four-wheel steering loader according to claim 4, characterized in that: The reverse clutch shaft (11) is equipped with a hub gear (14) that meshes with the first gear (15) for transmission.

6. The plunger pump gearbox for a four-wheel steering loader according to claim 4, characterized in that: A high-speed output gear (17) and a low-speed output gear (18) are rotatably mounted on the output shaft (13); the high-speed output gear (17) is meshed with the first gear (15) for transmission, and the low-speed output gear (18) is meshed with the second gear (16) for transmission.

7. The plunger pump gearbox for a four-wheel steering loader according to claim 6, characterized in that: An engaging sleeve (19) is provided between the high-speed output gear (17) and the low-speed output gear (18), and the engaging sleeve (19) is connected to the shift fork mechanism.

8. The plunger pump gearbox for a four-wheel steering loader according to claim 6, characterized in that: Output flanges (20) are mounted on both ends of the output shaft (13).

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