Taper connecting device for hub driving system and engineering vehicle

Abstract

The utility model discloses a taper connecting device for a hub driving system and an engineering vehicle. The taper connecting device comprises a motor coupler, a motor half shaft and a connecting sleeve arranged in the hub driving system. A conical hole which axially extends inwards is formed in one axial end surface of the motor coupling; the portion, extending out of the motor shell, of the motor half shaft is arranged to be a conical part matched with the conical hole, the conical part is tightly inserted into the conical hole, then the motor half shaft and the motor coupler are fixed together in a taper connection mode, and torque is transmitted through friction force. The opposite circumferential surfaces of the connecting sleeve and the motor coupler are connected through a spline to transmit torque; if the spline on the motor coupler is worn, only the motor coupler needs to be replaced, the whole motor half shaft does not need to be replaced, and the operation is simple and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of taper connecting devices for hub drive system, belong to engineering vehicle technical field. BACKGROUND

[0002] At present, hub drive system is the key core component of large engineering machinery such as mining dump truck, and its quality directly determines the vehicle performance and reliability. The power of electric drive mining dump truck hub drive system comes from motor, and the motor transmits power to hub drive system through motor half shaft to realize the driving of vehicle. In the prior art, the motor half shaft is an integral half shaft, which transmits power by connecting the outer teeth of the motor half shaft with the inner teeth of the coupling sleeve of the hub drive system. This structure needs to disassemble the motor and replace the motor half shaft when the motor half shaft outer teeth are worn or damaged. This form of structure is simple, but the maintenance cycle is long and the cost is high. SUMMARY

[0003] According to the deficiencies of the prior art, the utility model provides a taper connecting device for hub drive system, which is reliable in performance and the motor half shaft will not be worn. If the motor coupling outer teeth are damaged, it can be easily replaced and repaired without replacing the entire motor half shaft.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In a first aspect, the utility model provides a taper connecting device for hub drive system, comprising:

[0006] The motor coupling has an inwardly axially extending tapered hole at one axial end face;

[0007] The motor half shaft is arranged to match the tapered hole at the part extending from the motor housing, and the tapered part is tightly inserted into the tapered hole, thereby fixing the motor half shaft and the motor coupling together through taper connection, and transmitting torque by relying on friction force;

[0008] The coupling sleeve arranged in the hub drive system is sleeved on the motor coupling, and the torque is transmitted by spline coupling between the opposite circumferential surfaces of the two.

[0009] In some embodiments, a circle of outer splines is arranged on the radial outer circumferential surface of the motor coupling along its circumferential direction, a circle of inner splines is arranged on the radial inner circumferential surface of the coupling sleeve along its circumferential direction, and the outer splines and the inner splines are matched to form the spline coupling.

[0010] In some embodiments, at least one annular oil groove is arranged on the radial circumferential surface of the tapered hole, and a radial oil passage is arranged on the motor coupling and communicates with the annular oil groove, and an oil plug is arranged at the inlet of the radial oil passage.

[0011] In some embodiments, one annular oil groove is arranged on the front and rear regions of the radial circumferential surface of the tapered hole, and each annular oil groove matches one radial oil passage.

[0012] In some embodiments, the tapered hole is a stepped hole, and the front axial end surface of the motor half shaft abuts against the stepped surface of the stepped hole to axially fix the motor half shaft.

[0013] In some embodiments, a threaded hole extending axially inward is arranged on the central region of the front axial end surface of the motor half shaft, which is used for fixing the tooling when the motor coupling is assembled and disassembled.

[0014] In some embodiments, a flange structure is arranged on the radial outer circumferential surface of the motor coupling close to the motor, and a spacer ring axially positioning the coupling sleeve is arranged on the motor coupling between the flange structure and the coupling sleeve.

[0015] In some embodiments, a sealing assembly is arranged at the connection between the motor coupling and the motor half shaft.

[0016] In some embodiments, the sealing assembly comprises:

[0017] a sealing seat arranged at the connection between the motor coupling and the motor half shaft, and fixed on the axial surface of the motor housing by the circumferential screws arranged axially;

[0018] a first O-ring arranged between the sealing seat and the motor housing;

[0019] a sealing tube arranged on the motor coupling and the coupling sleeve, and the outer axial annular surface of the sealing tube abuts against the annular groove recessed on the axial annular surface of the sealing seat;

[0020] a second O-ring arranged between the sealing tube and the sealing seat.

[0021] In some embodiments, an annular support extending along the entire circumferential surface is arranged on the radial inner circumferential surface of the inner axial end of the sealing tube, and the annular support contacts the coupling sleeve to support and guide the coupling sleeve; the middle region of the radial outer circumferential surface of the sealing tube is post-welded to the boss on the radial inner circumferential surface of the frame in the hub drive system through the stop structure.

[0022] The utility model provides a kind of engineering vehicle, including the taper connecting device for hub drive system of above-mentioned.

[0023] The utility model has the beneficial effects that:

[0024] The utility model is used for the device of motor connection of hub drive system, the structure can be replaced by the hydraulic device and the motor shaft coupling is removed when the motor half shaft outer gear wears or is damaged, reduces the wear of motor half shaft;Motor shaft coupling can design pressure distance value according to the size of transmission torque, is convenient to replace when maintaining, easy to operate;Motor half shaft universality is stronger, can realize modular design. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are part of the present application, serve to further understand the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, but do not constitute undue limitations on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] In the drawings:

[0027] Figure 1 It is a whole structure schematic view of the taper connecting device for hub drive system of the utility model;

[0028] Figure 2 It is a motor half shaft structure schematic view of the utility model;

[0029] Figure 3 It is a motor shaft coupling structure schematic view of the utility model.

[0030] Drawing mark: 1-motor half shaft, 2-oil plug, 3-motor shaft coupling, 4-first O ring, 5-sealing seat, 6-second O ring, 7-separation ring, 8-rack, 9-coupling sleeve, 10-sealing tube, 11-annular support, 1-1-conical part, 1-2-thread hole, 3-1-conical hole, 3-2-external spline, 3-3-annular oil groove.

[0031] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0033] In the description of the utility model, it should be explained that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] In the description of the utility model, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium.

[0035] As shown in Figure 1 , Figure 2 , Figure 3 A kind of taper connection device for hub drive system, including motor shaft coupling 3, motor half shaft 1 and coupling sleeve 9 arranged in hub drive system;One axial end surface of motor shaft coupling 3 is equipped with an inward axial taper hole 3-1;The part of motor half shaft 1 that extends from motor housing is set to the taper part 1-1 matched with taper hole 3-1, taper part 1-1 is tightly inserted in taper hole 3-1, in turn motor half shaft 1 and motor shaft coupling 3 are fixed together by taper connection mode, rely on friction to transmit torque;Coupling sleeve 9 is sleeved on motor shaft coupling 3, and torque is transmitted by spline coupling between the opposite circumferential surfaces of the two.

[0036] It should be noted that the taper of taper hole 3-1 and taper part 1-1 is 1:50, and motor half shaft 1 and motor shaft coupling 3 are fixed by taper connection mode, and the taper matching length and pressure distance value can be designed according to the size of transmitted torque.

[0037] As shown in Figure 1 , Figure 3 A circle of outer splines is arranged on the radial outer circumferential surface of motor shaft coupling 3 along the circumferential direction thereof, a circle of inner splines is arranged on the radial inner circumferential surface of coupling sleeve 9 along the circumferential direction thereof, and the outer splines and the inner splines are matched to form spline coupling.

[0038] Further solutions, such as Figure 1 、 Figure 3 As shown, at least one annular oil groove 3-3 is provided on the radial circumferential surface of the tapered hole 3-1, and a radial oil channel connected to the annular oil groove 3-3 is provided on the motor coupling 3, and an oil plug 2 is installed at the entrance of the radial oil channel.

[0039] In a preferred solution, an annular oil groove 3 - 3 is provided in the front area and the rear area of ​​the radial circumference of the tapered hole 3 - 1 , and each annular oil groove 3 - 3 is matched with a radial oil channel.

[0040] It should be noted that the number of annular oil grooves is not limited to the two annular oil grooves mentioned above. In actual design, three annular oil grooves can also be provided. The reason for providing multiple annular oil grooves is that the conical surface can be fully lubricated, which makes it easier to remove the motor coupling from the motor half shaft.

[0041] Further solutions, such as Figure 1 、 Figure 3 As shown, the tapered hole 3 - 1 is a stepped hole, and the front axial end face of the motor half shaft 1 abuts against the stepped surface of the stepped hole, thereby achieving axial fixation of the motor half shaft 1 .

[0042] Further solutions, such as Figure 1 、 Figure 2 As shown, a threaded hole 1-2 extending axially inward is provided in the central area of ​​the front axial end face of the motor half-shaft 1 for fixing the tooling when installing and removing the motor coupling 3.

[0043] Further solutions, such as Figure 1 As shown, the radial outer peripheral surface of the motor coupling 3 is provided with a flange structure near the motor, and a spacer ring 7 for axially positioning the coupling sleeve 9 is sleeved on the motor coupling 3 between the flange structure and the coupling sleeve 9.

[0044] Further solutions, such as Figure 1 As shown, a sealing assembly is arranged at the connection between the motor coupling 3 and the motor half shaft 1.

[0045] The specific structure of the above-mentioned sealing assembly is further described below.

[0046] The sealing assembly comprises a sealing seat 5, a first O-shaped ring 4, a sealing pipe 10 and a second O-shaped ring 6; the sealing seat 5 is sleeved at the connecting position of the motor shaft coupling 3 and the motor half shaft 1, and is fixed on the axial surface of the motor shell through the axially arranged peripheral screws; the first O-shaped ring 4 is arranged between the sealing seat 5 and the motor shell; the sealing pipe 10 is sleeved on the motor shaft coupling 3 and the coupling sleeve 9, and the outer axial annular surface of the sealing pipe 10 is arranged in the annular groove on the axial annular surface of the sealing seat 5; the second O-shaped ring 6 is arranged between the sealing pipe 10 and the sealing seat 5.

[0047] Further solutions, as shown in Figure 1 The inner axial end of the sealing pipe 10 is provided with an annular support 11 extending along the entire circumference of the inner axial end, and the annular support 11 is in contact with the coupling sleeve 9 to support and guide the coupling sleeve 9; the middle region of the radial outer periphery of the sealing pipe 10 is welded to the boss on the radial inner periphery of the rack 8 of the hub drive system through the stop structure.

[0048] In summary, the utility model provides a kind of taper connection device for hub drive system, motor shaft coupling inner wall is provided with tapered hole, motor half shaft is provided with the tapering portion matched with tapered hole, the taper of tapered hole, tapering portion is 1:50, motor half shaft and motor shaft coupling are fixed by the way of taper connection, and taper matching length and pressure distance value can be designed according to the size of transmission torque;Motor shaft coupling end portion is connected with coupling sleeve by internal and external spline, to realize the transmission of motor torque, if the external spline wears, only need to replace motor shaft coupling, do not need to replace motor half shaft, easy and convenient to operate.

[0049] The utility model provides engineering vehicle, and the following description engineering vehicle can be correspondingly referred to the above description of the taper connection device for hub drive system.

[0050] The utility model provides a kind of engineering vehicle, can include the taper connection device for hub drive system as described in any one of the above embodiments.

[0051] The utility model provides engineering vehicle reaches the beneficial effect consistent with the taper connection device for hub drive system provided by the utility model, then here no longer elaborates.

[0052] It should be noted that the above engineering vehicle can be a mine dump truck.

[0053] In the description provided herein, a large number of specific details are illustrated. It is understood, however, that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

[0054] Furthermore, to one skilled in the art, it is readily apparent that different features of the various embodiments described herein can be combined with each other, if not merge, to form yet further embodiments, which also fall within the scope of the present application. For example, in the above embodiments, one skilled in the art can use the features in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0055] The above merely provides the preferred embodiments of the present application, but is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solutions of the present application, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still fall within the scope of the present application.

Claims

1. A taper connection device for a wheel hub drive system, characterized by It comprises: A motor coupling, which is provided with a tapered hole extending inwardly and axially at one axial end surface; A motor half shaft, which is provided with a tapered portion at the part extending out of the motor housing, the tapered portion is tightly inserted into the tapered hole, and the motor half shaft and the motor coupling are fixed together by taper connection, and torque is transmitted by friction; A coupling sleeve arranged in the hub drive system, which is sleeved on the motor coupling, and torque is transmitted by spline connection between the opposite circumferential surfaces of the two.

2. The taper connection device for the hub drive system according to claim 1, wherein: A set of external splines is arranged on the radial outer circumferential surface of the motor coupling along the circumferential direction, a set of internal splines is arranged on the radial inner circumferential surface of the coupling sleeve along the circumferential direction, and the external splines and the internal splines are matched to form the spline connection.

3. The taper connection device for the hub drive system according to claim 1, wherein: At least one annular oil groove is arranged on the radial circumferential surface in the tapered hole, and a radial oil passage is arranged on the motor coupling and communicates with the annular oil groove, and an oil plug is arranged at the inlet of the radial oil passage.

4. The taper connection device for the hub drive system according to claim 3, wherein: An annular oil groove is arranged at the front and rear regions of the radial circumferential surface in the tapered hole, and each annular oil groove is matched with a radial oil passage.

5. The taper connection device for the hub drive system according to claim 1, wherein: The tapered hole is a stepped hole, and the front axial end surface of the motor half shaft abuts against the stepped surface of the stepped hole to axially fix the motor half shaft.

6. The taper connection device for the hub drive system according to claim 1, wherein: A threaded hole extending inwardly and axially is arranged at the central region of the front axial end surface of the motor half shaft, and the threaded hole is used for fixing the tooling when the motor coupling is installed and removed.

7. The taper connection device for the hub drive system according to claim 1, wherein: A flange structure is arranged on the radial outer circumferential surface of the motor coupling close to the motor, and a spacer ring is sleeved on the motor coupling between the flange structure and the coupling sleeve to axially position the coupling sleeve.

8. The taper connection device for the hub drive system according to claim 1, wherein: A sealing assembly is arranged at the connection between the motor coupling and the motor half shaft.

9. The taper lock for a hub drive system as defined in claim 8, wherein, The sealing assembly comprises: A sealing seat, which is sleeved on the connection between the motor coupling and the motor half shaft, and is fixed on the axial surface of the motor housing by the circumferential screws arranged axially; A first O-ring, which is arranged between the sealing seat and the motor housing; A sealing tube, which is sleeved on the motor coupling and the coupling sleeve, and the outer axial annular surface of the sealing tube abuts against the annular groove recessed in the axial annular surface of the sealing seat; A second O-ring, which is arranged between the sealing tube and the sealing seat.

10. The taper connection device for the hub drive system according to claim 9, wherein: An annular support is arranged on the radially inner peripheral surface of the inner axial end of the sealing tube, which is in contact with the coupling sleeve and supports and guides the coupling sleeve; The middle region of the radially outer peripheral surface of the sealing tube and the boss on the radially inner peripheral surface of the frame in the hub drive system are fixed by the stop structure and welded together.

11. An engineering vehicle, characterized by: The tapered connecting device for the hub drive system according to any one of claims 1 to 10.

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