Multi-motor coupled transmission

Abstract

The invention relates to a multi-motor coupled transmission which comprises a box body, an output shaft and at least two input shafts are installed in the box body, one end or two ends of each input shaft is / are connected with a driving motor, and the box body is provided with a bearing lubricating structure of the input shafts. A mounting structure for preventing the output shaft of the motor from being blocked is arranged between the driving motor and the box body, and an anti-deformation structure connected with a vehicle is arranged at the outer side end of the driving motor. According to the transmission, the lubricating effect of the bearing can be improved, and the situation that a motor deforms and even a motor shaft is broken is effectively avoided.

Description

Technical Field

[0001] The invention relates to a transmission with multiple motors coupled. Background Art

[0002] In order to save energy and reduce the cost of use, mining vehicles will be modified and equipped with electric transmissions. The bearing lubrication method of the input shaft of the electric transmission is usually to use the lubricating oil swung when the gear pair rotates. Since the bearing is set in the bearing hole, the amount of lubricating oil swung by the gear pair that can enter the bearing hole is small. Especially for electric transmissions with multiple input motors, the position of the input shaft bearing hole on the upper part of the transmission case is usually higher than the lubricating oil level, and the amount of lubricating oil that can be obtained is small, which can easily cause insufficient lubrication of the bearing and affect the service life of the input shaft bearing.

[0003] After the existing electric transmission was installed on the mining vehicle and used for a period of time, it was found that a gap appeared on the upper part between the end surface where the input motor of the electric transmission was connected to the gearbox body, and there was dust in the gap, and the motor was deformed (the axis of the motor was not in the same straight line as the input axis in the gearbox body), and even the motor output shaft was broken, which affected the use of the electric transmission. After some inspection and research, it was found that the case of the electric transmission was connected to the beam of the vehicle, and the outer end of the motor was a suspended installation structure, which caused the electric transmission to deform under the action of gravity and a gap to appear between the motor and the gearbox body after a period of use.

[0004] In addition, when the motor of the existing electric transmission is connected to the input shaft, the output shaft of the motor produced by the manufacturer is installed with two bearings to connect to the motor housing, and the input shaft in the electric transmission housing for connecting to the motor output shaft is also connected to the housing with two bearings, which makes the motor output shaft over-positioned when connected to the input shaft, and requires a very high coaxiality. This causes the motor output shaft to be stuck, unable to rotate or broken due to the deviation of coaxiality when the motor is in use, which seriously affects the normal use of the electric transmission. Summary of the invention

[0005] An object of the present invention is to provide a transmission for coupling multiple motors, which helps to improve the lubrication effect of the bearings and effectively avoids deformation of the motors or even breakage of the motor shafts.

[0006] The technical solution of the present invention is: a multi-motor coupled transmission, including a housing, in which an output shaft and at least two input shafts are installed, one end or both ends of the input shaft are connected to a drive motor, the housing is provided with a bearing lubrication structure of the input shaft, a mounting structure is provided between the drive motor and the housing to prevent the motor output shaft from being suffocated, and an anti-deformation structure for connecting to a vehicle is provided at the outer end of the drive motor.

[0007] Furthermore, the bearing lubrication structure includes a main oil channel transversely arranged on the top of the box body, and a hydraulic valve block mounting seat is arranged on the box body. The main oil channel is connected with the oil outlet channel on the hydraulic valve block mounting seat through an oil inlet channel, and both ends of the main oil channel are provided with oil supply channels leading to the input shaft bearing mounting holes at the corresponding side ends.

[0008] Furthermore, the gearbox housing is composed of a main housing and a side housing covering one side end of the main housing, the oil inlet channel is opened on the upper part of the end surface where the main housing and the side housing match, and the oil inlet channel is connected to the oil outlet channel on the hydraulic valve block mounting seat through the oil inlet hole.

[0009] Furthermore, the oil supply channel includes a vertical oil channel connected to the end of the main channel, the vertical oil channel leads to the input shaft bearing mounting hole located at the corresponding side end and at the upper part, an oil guide structure is provided at the bottom of the input shaft bearing mounting hole located at the upper part, and an oil guide groove leading to the input shaft bearing mounting hole located at the lower part is provided in the housing, and the oil guide structure is connected to the oil guide groove.

[0010] Furthermore, the oil introduction structure comprises an oil introduction groove which is located on the bottom surface of the upper input shaft bearing mounting hole and is recessed downward, and the oil introduction groove is connected to the oil guide groove via a transversely arranged oil introduction port.

[0011] Furthermore, the top surface of the input shaft bearing mounting hole at the upper part is provided with a first oil inlet groove which is recessed upward and connected to the vertical oil passage; the top surface of the input shaft bearing mounting hole at the lower part is provided with a second oil inlet groove which is connected to the lower end of the oil guide groove.

[0012] Furthermore, the mounting structure includes a first bearing arranged at both ends of the input shaft and rotatably connected to the housing, one end of the motor output shaft of the drive motor is rotatably connected to the motor housing via a second bearing, and the other end of the motor output shaft passes through the motor housing and extends into the input shaft to be connected to the input shaft.

[0013] Furthermore, a connecting cavity for the other end of the motor output shaft to extend into is axially arranged at the end of the input shaft, and the other end of the motor output shaft is connected and fixed to the connecting cavity via a spline.

[0014] Furthermore, the anti-deformation structure includes a fixing plate installed on the outer end of the driving motor, a suspension plate is laterally fixed to the upper end of the fixing plate, and both ends of the suspension plate are respectively provided with fixed support components for connecting to the beam body of the vehicle.

[0015] Furthermore, the fixed support assembly includes an L-shaped plate for connecting to the beam body of the vehicle, and a buffer pad is arranged between the transverse plate portion of the L-shaped plate and the lower side of the end portion of the suspension plate, and the end portion of the suspension plate is connected and fixed to the L-shaped plate via fixing bolts passing through the buffer pad and the transverse plate portion of the L-shaped plate.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This transmission helps to improve the lubrication effect of the bearings and effectively avoids motor deformation or even motor shaft breakage. It is suitable for transmissions with multiple motor couplings such as four-motor transmissions and six-motor speed transmissions.

[0017] 2. The transmission increases the lubrication of the input shaft bearing by providing an oil guide channel on the housing that connects the hydraulic valve block with the input shaft bearing mounting hole located at the upper portion; at the same time, by providing an oil guide groove that connects the remaining input shaft bearing mounting holes, the bearings on the remaining input shafts can also be lubricated, thereby ensuring the lubrication effect of each input shaft bearing.

[0018] 2. The transmission opens an oil guide groove on the inner wall of the case and then welds a cover plate to form the oil guide groove, which effectively reduces the difficulty of making the oil guide groove. The oil guide groove and the cover plate on it are both set on the inner wall of the case, which is not only beautiful, but also does not need to worry about oil leakage.

[0019] 3. The transmission eliminates a bearing on the output shaft of the drive motor, turning the motor output shaft into a cantilever shaft, effectively overcoming the over-positioning problem and increasing the margin of activity of the motor output shaft, so that the motor output shaft will not be stuck or even broken.

[0020] 4. The transmission is connected to the outer end cover of the drive motor by setting a fixing plate, and the fixing plate is connected to the beam of the vehicle through a suspension plate, so that the outer side end of the drive motor is changed from a cantilever state to a fixed state, thereby preventing the drive motor from being deformed due to suspension after the transmission is installed on the vehicle and used for a period of time, affecting the normal use of the transmission, avoiding the formation of gaps between the motor and the gearbox body, and further preventing the motor output shaft from being suffocated or broken due to motor deformation.

[0021] 5. The transmission also connects the motors on the same side of the transmission through a fixing plate, thereby improving overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the box structure of the transmission of the present invention; Figure 3 A cross-sectional view of a transmission case of the present invention; Figure 4 It is a cross-sectional view of the cooperation between the vertical oil passage, the main oil passage and the first oil inlet groove of the present invention; Figure 5 The cross-sectional view of the output shaft and the housing of the present invention is shown in FIG. Figure 1 ; Figure 6 The cross-sectional view of the output shaft and the housing of the present invention is shown in FIG. Figure 2 ; Figure 7 For the present invention Figure 5 A magnified image of area A; Figure 8 It is a cross-sectional view of the input shaft and the housing of the present invention; Fig. 9 For the present invention Figure 8 A magnified view of area B; Fig.10 It is a schematic diagram of the matching structure of the anti-deformation structure and the transmission of the present invention; Fig.11 For the present invention Fig.10 Magnified image of area C; Fig.12 It is a schematic diagram of the structure of the fixed plate and the suspension plate of the present invention; In the figure: 1-box, 1a-main housing, 1b-side housing, 11-hydraulic valve block mounting seat, 111-oil outlet channel, 112-hydraulic valve block, 12-main oil channel, 121-gear lubricating oil channel, 13-oil inlet channel, 131-oil inlet hole, 14-input shaft bearing mounting hole at the upper part, 141-first oil inlet groove, 142-oil inlet groove, 143-oil inlet port, 15-vertical oil channel, 16-sleeve mounting cavity, 17-oil guide groove, 171-oil guide groove, 172-cover plate, 18-input shaft bearing mounting hole at the lower part, 181-second oil inlet groove, 19- Bearing lubrication oil inlet channel, 101-end face; 2-output shaft, 21-internal lubrication oil channel, 22-second bearing lubrication hole, 23-radial oil outlet hole; 3-sleeve, 31-first bearing lubrication hole; 4-input shaft, 41-first bearing, 42-connecting cavity, 43-spline; 5-drive motor, 51-motor output shaft, 52-second bearing; 6-fixed plate, 61-bolt hole, 62-avoidance hole, 63-folded edge, 64-hollow part; 7-suspension plate, 71-waist-shaped hole, 72-pad; 8-fixed support assembly; 8-fixed support assembly, 81-L-shaped plate, 811-L-shaped plate transverse plate part, 812-waist-shaped hole, 813-reinforcement rib plate, 82-buffer pad. DETAILED DESCRIPTION

[0023] In order to make the above features and advantages of the present invention more easily understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0024] refer to Figures 1 to 12 A multi-motor coupled transmission comprises a housing 1, in which an output shaft 2 and at least two input shafts 4 are installed, one end or both ends of the input shaft are connected to a drive motor 5, the housing is provided with a bearing lubrication structure for the input shaft, a mounting structure is provided between the drive motor and the housing to prevent the motor output shaft 51 from being suffocated and broken, and an anti-deformation structure is provided at the outer end of the drive motor for connecting with a beam body 6 of a vehicle to prevent the motor from being deformed.

[0025] In this embodiment, the bearing lubrication structure includes a main oil passage 12 transversely arranged on the top of the box body, a hydraulic valve block mounting seat 11 is arranged on the box body, the main oil passage is connected to the oil outlet passage 111 on the hydraulic valve block mounting seat through the oil introduction channel 13, and both ends of the main oil passage are provided with oil supply passages leading to the input shaft bearing mounting holes at the corresponding side ends. The lubricating oil in the oil tank is pumped out through the pump body installed on the transmission, and the lubricating oil is distributed by the hydraulic valve block 112 installed on the hydraulic valve block mounting seat, and the lubricating oil is introduced into the input shaft bearing mounting hole through the oil introduction channel, the main oil passage, and the oil supply passage, so that the lubricating oil lubricates the bearing.

[0026] In this embodiment, in order to better open the oil introduction channel and the main oil channel, the gearbox housing is composed of a main housing 1a and a side housing 1b sealed at one side end of the main housing. The oil introduction channel is opened at the upper part of the end surface 101 where the main housing and the side housing match. The oil introduction channel is connected to the oil outlet channel on the hydraulic valve block mounting seat through the oil introduction hole 131 that penetrates the main housing horizontally, thereby introducing the lubricating oil into the main oil channel. Vertical holes connecting the main oil channel and the upper input shaft bearing mounting hole are vertically opened on the other side end of the main housing and the side housing, and the upper end of the vertical hole is blocked to form a vertical oil channel.

[0027] In this embodiment, the oil supply channel includes a vertical oil channel 15 connected to the end of the main channel, and the vertical oil channel leads to the input shaft bearing mounting hole 14 located at the corresponding side end and at the upper part. An oil guide structure is provided at the bottom of the input shaft bearing mounting hole located at the upper part, and an oil guide groove 17 leading to the input shaft bearing mounting hole located at the lower part is provided in the housing. The oil guide structure is connected to the oil guide groove, so as to collect and introduce the lubricating oil into the input shaft bearing mounting hole located at the lower part.

[0028] Specifically, the oil introduction structure includes an oil introduction groove 142 which is arranged on the bottom surface of the input shaft bearing mounting hole located at the upper part and is recessed downward, and the oil introduction groove is connected to the oil guide groove through a transversely arranged oil introduction port 143. The lubricating oil is collected through the oil introduction groove, and then the lubricating oil is allowed to enter the oil guide groove through the oil introduction port, and then sent to the input shaft bearing mounting hole located at the lower part.

[0029] In this embodiment, in order to allow the lubricating oil to better diffuse into the input shaft bearing mounting hole, the top surface of the input shaft bearing mounting hole located at the upper portion is provided with a first oil inlet groove 141 which is recessed upward and connected to the vertical oil passage; the top surface of the input shaft bearing mounting hole 18 located at the lower portion is provided with a second oil inlet groove 181 which is connected to the lower end of the oil guide groove.

[0030] In this embodiment, in order to better process the oil guide groove and feed the lubricating oil into the input shaft bearing mounting hole located at the bottom, the inner wall of the box body is provided with an oil guide groove 171, and a cover plate 172 is welded on the oil guide groove to form the oil guide groove. In the six-motor transmission, the oil guide groove is in an inverted U shape, and the two side ends of the inverted U shape correspond to the two input shaft bearing mounting holes located at the bottom.

[0031] In this embodiment, in order to lubricate the gears in the transmission case, gear lubrication oil passages 121 are vertically arranged in the transmission case and on both sides of the main oil passage.

[0032] In this embodiment, in order to lubricate the bearing on the output shaft, a bearing lubrication oil inlet channel 19 for the output shaft 2 is provided on one side of the transmission housing, one end of the bearing lubrication oil inlet channel is connected to the oil outlet channel on the hydraulic valve block mounting seat, and the other end of the bearing lubrication oil inlet channel is connected to the sleeve mounting cavity 16 provided in the transmission housing, a sleeve 3 (circular ring sleeve) sleeved on the output shaft is installed in the sleeve mounting cavity, and a first bearing lubrication hole 31 leading to the output shaft bearing mounting hole on one side is axially provided on the sleeve 3 (circular ring sleeve), and the lubricating oil leaked through the open ring between the output shaft and the sleeve is introduced into the bearing mounting hole on one side of the transmission through the first bearing lubrication hole, so as to lubricate the bearing. An internal lubricating oil channel 21 connected to the sleeve mounting cavity is provided in the output shaft, and a second bearing lubricating hole 22 leading to the output shaft bearing mounting hole on the other side is axially provided on the internal lubricating oil channel, and a plug is provided at the other end of the internal lubricating oil channel, and a small hole is formed on the plug to form the second bearing lubrication hole, so that the lubricating oil is supplied to the bearing at the other end for lubrication.

[0033] In this embodiment, the output shaft is located in the transmission case and is provided with radial oil outlet holes 23 connected to the internal lubricating oil channel, so that the gears on the output shaft and the bearings in the gears can be lubricated through the radial oil outlet holes.

[0034] The lubricating oil in the oil tank is pumped into the valve block mounting seat through the pump body originally installed on the transmission. The hydraulic valve block on the valve block mounting seat controls the lubricating oil input into the main oil channel and the bearing lubrication oil inlet channel. The lubricating oil entering the main oil channel is sent to the input shaft bearing mounting hole located at the upper part, and then sent to the input shaft bearing mounting hole located at the lower part through the oil guide groove. The lubricating oil finally flows into the transmission case for circulation. The lubricating oil entering the bearing lubrication oil inlet channel is supplied to the bearing lubrication on the output shaft.

[0035] In this embodiment, in order to prevent the connection between the input shaft and the motor output shaft from being over-positioned, and the motor output shaft from being stuck (unable to rotate) or broken, the mounting structure includes a first bearing 41 disposed at both ends of the input shaft and mounted in the input shaft bearing mounting hole of the housing, and the input shaft and the housing are rotatably connected through the two first bearings. One end of the motor output shaft of the drive motor is rotatably connected to the motor housing via a second bearing 52, and the other end of the motor output shaft is not installed with a bearing and passes through the motor housing and extends into the input shaft to be connected with the input shaft. Thus, by installing only three bearings between the input shaft and the motor output shaft, and the motor output shaft becomes a cantilever shaft to increase the activity space (margin), thereby avoiding the occurrence of the motor output shaft being stuck or broken due to coaxiality deviation and the like.

[0036] In this embodiment, a connecting cavity 42 is axially provided at the end of the input shaft for the other end of the motor output shaft to extend into, and the other end of the motor output shaft is connected and fixed to the connecting cavity via a spline 43 structure, thereby realizing power input.

[0037] In this embodiment, in order to prevent the deformation of the drive motor caused by the cantilever installation of the motor after a period of use, which further causes the motor output shaft to be stuck or broken, the anti-deformation structure includes a fixing plate 6 installed on the outer end of the drive motor, a suspension plate 7 is transversely fixed to the upper end of the fixing plate, and both ends of the suspension plate are respectively provided with a fixed support assembly 8 for connecting to the beam body of the vehicle. Through the cooperation of the fixing plate and the suspension plate, the outer end of the drive motor is changed from the original cantilever installation mode to a structure connected to the component, so as to avoid the outer end of the drive motor being suspended and installed, thereby preventing the drive motor from being deformed.

[0038] In this embodiment, in order to better connect with the motor of the transmission, a threaded hole is provided on the end cover of the transmission motor, and a plurality of bolt holes 61 are provided on the fixing plate for being screwed with the threaded holes on the end cover of the transmission motor via bolts. Specifically, a plurality of bolt holes 61 connected with the end cover of the transmission motor are provided on both sides of the lower part and the middle part of the upper side of the fixing plate, so as to better connect with the outer ends of the three motors on the same side of the transmission.

[0039] In this embodiment, a circumvention hole 62 is provided in the middle of the fixing plate for the output shaft to pass through, so as to avoid the output shaft for power output. In order to improve the strength of the fixing plate and reduce the deformation of the fixing plate, each side edge of the fixing plate is provided with a folded edge 63. In order to reduce the weight of the fixing plate, hollow portions 64 are provided on both sides of the fixing plate.

[0040] In this embodiment, the fixed support assembly includes an L-shaped plate 81 for connecting to the beam body of the vehicle, and a buffer pad 82 is arranged between the transverse plate portion of the L-shaped plate and the lower side of the end of the suspension plate. The end of the suspension plate is laterally provided with a waist-shaped hole 71 and is connected and fixed to the L-shaped plate through fixing bolts passing through the buffer pad and the transverse plate portion 811 of the L-shaped plate, thereby realizing the connection of the suspension plate and the beam body of the vehicle into one.

[0041] In this embodiment, pads 72 for contacting with the buffer pads are fixed to the lower sides of both ends of the suspension plate, thereby increasing the contact area with the buffer pads. The upper part of the fixing plate is provided with a plurality of bolt holes and is connected and fixed to the suspension plate via a plurality of connecting bolts, thereby connecting the fixing plate and the suspension plate into one.

[0042] In this embodiment, the vertical plate portion of the L-shaped plate is vertically provided with a waist-shaped hole 812 so that it can be connected to the beam body of the vehicle by means of fixing bolts passing through the waist-shaped hole 812. A reinforcing rib plate 813 is provided between the vertical plate portion and the horizontal plate portion of the L-shaped plate to improve the strength of the L-shaped plate.

[0043] In this embodiment, the transmission housing is further provided with a mounting assembly connected to the beam of the vehicle.

[0044] The fixing plate is connected to the outer end cover of the drive motor through a fixing plate, and the fixing plate is connected to the beam of the vehicle through a suspension plate, so that the outer end of the drive motor changes from a cantilever state to a fixed state, thereby preventing the motor from being deformed due to suspension after the transmission is installed on the vehicle and used for a period of time, thereby affecting the normal use of the transmission.

[0045] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, designing different forms of multi-motor coupled transmissions does not require creative labor. Without departing from the principles and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A transmission with multiple motors coupled, comprising a housing, wherein an output shaft and at least two input shafts are installed in the housing, wherein one end or both ends of the input shafts are connected to a drive motor, wherein: The housing is provided with a bearing lubrication structure for the input shaft, a mounting structure for preventing the motor output shaft from being stuck is provided between the drive motor and the housing, and an anti-deformation structure for connecting with a vehicle is provided at the outer end of the drive motor.

2. The multi-motor coupled transmission according to claim 1, characterized in that: The bearing lubrication structure includes a main oil channel arranged transversely on the top of the box body, a hydraulic valve block mounting seat is arranged on the box body, the main oil channel is connected with the oil outlet channel on the hydraulic valve block mounting seat through an oil inlet channel, and both ends of the main oil channel are provided with oil supply channels leading to the input shaft bearing mounting holes at the corresponding side ends.

3. The multi-motor coupled transmission according to claim 2, characterized in that: The gearbox housing is composed of a main housing and a side housing sealed at one side end of the main housing. The oil inlet channel is opened on the upper end of the matching end surface of the main housing and the side housing. The oil inlet channel is connected to the oil outlet channel on the hydraulic valve block mounting seat through the oil inlet hole.

4. The multi-motor coupled transmission according to claim 2 or 3, characterized in that: The oil supply channel includes a vertical oil channel connected to the end of the main channel, the vertical oil channel leads to the input shaft bearing mounting hole located at the corresponding side end and at the upper part, an oil guide structure is provided at the bottom of the input shaft bearing mounting hole located at the upper part, an oil guide groove leading to the input shaft bearing mounting hole located at the lower part is provided in the box body, and the oil guide structure is connected to the oil guide groove.

5. The multi-motor coupled transmission according to claim 4, characterized in that: The oil introduction structure comprises an oil introduction groove which is located on the bottom surface of the input shaft bearing mounting hole at the upper part and is recessed downwards. The oil introduction groove is connected to the oil guide groove via a transversely arranged oil introduction port.

6. The multi-motor coupled transmission according to claim 4, characterized in that: The top surface of the input shaft bearing mounting hole at the upper part is provided with a first oil inlet groove which is recessed upward and connected to the vertical oil passage; the top surface of the input shaft bearing mounting hole at the lower part is provided with a second oil inlet groove which is connected to the lower end of the oil guide groove.

7. The multi-motor coupled transmission according to claim 1, 2, 3, 5 or 6, characterized in that: The mounting structure includes a first bearing arranged at both ends of the input shaft and rotatably connected to the housing, one end of the motor output shaft of the drive motor is rotatably connected to the motor housing via a second bearing, and the other end of the motor output shaft passes through the motor housing and extends into the input shaft to be connected to the input shaft.

8. The multi-motor coupled transmission according to claim 7, characterized in that: The end of the input shaft is axially provided with a connecting cavity for the other end of the motor output shaft to extend into, and the other end of the motor output shaft is connected and fixed to the connecting cavity via a spline.

9. The multi-motor coupled transmission according to claim 1, 2, 3, 5, 6 or 8, characterized in that: The anti-deformation structure includes a fixing plate installed on the outer end of the driving motor, a suspension plate is transversely fixed to the upper end of the fixing plate, and both ends of the suspension plate are respectively provided with fixing support components for connecting to the beam body of the vehicle.

10. The multi-motor coupled transmission according to claim 9, characterized in that: The fixed support assembly includes an L-shaped plate for connecting to the beam body of the vehicle, a buffer pad is arranged between the transverse plate portion of the L-shaped plate and the lower side of the end of the suspension plate, and the end of the suspension plate is connected and fixed to the L-shaped plate via fixing bolts passing through the buffer pad and the transverse plate portion of the L-shaped plate.

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