Novel speed reducer

Abstract

The utility model relates to the technical field of speed reducers, and provides a novel speed reducer which comprises a shell, an input shaft in transmission connection with a motor is installed on the shell, the input shaft is in transmission connection with a clutch assembly, the clutch assembly comprises a middle shaft, the middle shaft is rotatably installed on the shell, one end of the middle shaft extends to the outer side of the shell and is provided with an oil connector, and the oil connector is connected with the motor. A low-speed middle gear and a high-speed middle gear are rotationally installed at the two ends, in the axial direction, of the middle shaft respectively and are in transmission connection with the clutch assembly, the low-speed middle gear is in transmission connection with a low-speed bottom gear, the low-speed bottom gear is installed on the output shaft, and the output shaft is rotationally installed on the shell. The two ends of the output shaft extend to the outer side of the shell to form output ends, and a high-speed bottom gear is further installed on the output shaft and is in transmission connection with the high-speed middle gear. According to the utility model, free switching between a high-speed advancing state and a low-speed advancing state can be realized, and the operation intensity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reducer technical field especially relates to a novel reducer. BACKGROUND

[0002] The reducer is generally used for the transmission equipment of speed reduction and torque increase, and the motor, internal combustion engine or other high-speed operation power is through the gear of the input shaft of the speed reducer and engages the large gear on the output shaft to achieve the purpose of speed reduction.

[0003] At present, the driving structure of small and medium-sized electric loaders has four kinds, which are single-gear reducer, two-gear reducer, four-gear reducer and motor direct drive, and each driving structure has different shortcomings in the use process.

[0004] 1. The single-gear reducer has the disadvantage of not considering low speed and high speed, and can only be biased to low speed and high speed, and if both are considered, the motor needs to have a large torque or a high speed;

[0005] 2. The two-gear reducer is divided into two kinds, one is synchronizer shifting, and the synchronizer shifting mostly needs to stop shifting, and if shifting in the process, it will have the problems of difficult shifting or loud shifting sound; the other is to use the motor or hydraulic cylinder to shift on the basis of the synchronizer shifting, but the above problems still exist;

[0006] 3. The four-gear reducer is modified on the basis of the fuel vehicle reducer, and the hydraulic torque converter is removed and directly driven by the motor, but the original reducer is loud, which is not suitable for electric loaders;

[0007] 4. The motor direct drive is directly driven by the motor, and the torque of the motor needs to be very large, which makes the controller difficult to match and easy to damage. CONTENT OF THE UTILITY MODEL

[0008] In order to overcome the defects of the prior art pointed out above, the utility model provides a novel reducer, which can realize free switching in high-speed running and low-speed running state, and reduce the operation strength.

[0009] To solve the above technical problems, the technical scheme of the utility model is:

[0010] The utility model provides a new type of speed reducer, including the casing, the input shaft is installed with motor drive connection on casing, input shaft drive connection clutch assembly, clutch assembly includes the middle axle, the middle axle is rotatably installed on the casing, and one end extends to the outside of casing, and is equipped with oil joint, the both ends of middle axle along the axial direction rotatably installed low speed middle gear and high speed middle gear respectively, low speed middle gear and high speed middle gear are drive connected with clutch assembly respectively, low speed middle gear drive connection low speed bottom gear, low speed bottom gear is installed on output shaft, output shaft is rotatably installed on the casing, and both ends extend to the outside of casing respectively, and form output end, output shaft is also equipped with high speed bottom gear, high speed bottom gear is drive connected with high speed middle gear.

[0011] As an improved technical solution, the clutch assembly further comprises a clutch housing, the outer side of the clutch housing is drive connected with the input shaft, the inner side of the clutch housing is relatively drive connected with two driving piece groups, the two driving piece groups are gap matched with two friction piece groups respectively, and the two friction piece groups are drive connected with the low speed middle gear and the high speed middle gear respectively.

[0012] The middle axle is further provided with two pistons which are communicated with the oil joint, and the two pistons are corresponded with the two driving piece groups respectively, and the two pistons are further respectively compressed with springs between the two pistons and the clutch housing.

[0013] As an improved technical solution, the outer side of the clutch housing is provided with a housing outer gear, and the input shaft is provided with an input gear, and the input gear is drive connected with the housing outer gear through gear meshing.

[0014] As an improved technical solution, the housing outer gear and the clutch housing are integrally formed or connected through a key groove.

[0015] The input gear and the input shaft are integrally formed or connected through a key groove.

[0016] As an improved technical solution, the low speed middle gear, the high speed middle gear, the low speed bottom gear, the high speed bottom gear, the housing outer gear and the input gear all adopt helical tooth grinding structure.

[0017] As an improved technical solution, the outer periphery of the driving piece group is provided with a driving piece outer gear, the inner side of the clutch housing is provided with a housing inner gear, and the housing inner gear is drive connected with the driving piece outer gear through meshing.

[0018] The inner side of the friction piece group is provided with a friction piece inner gear, and the friction piece inner gear is drive connected with the low speed middle gear and the high speed middle gear respectively.

[0019] As an improved technical scheme, the two pistons are respectively provided with a first chamber and a second chamber, the middle shaft is provided with a first oil channel, a second oil channel and a third oil channel, the first oil channel, the second oil channel and the third oil channel are all communicated with the oil connector, one end of the first oil channel away from the oil connector is communicated with the first chamber, one end of the second oil channel away from the oil connector is communicated with the second chamber, and one end of the third oil channel away from the oil connector is communicated with the driving piece group and the friction piece group.

[0020] As an improved technical scheme, the end cover is arranged on the shell and close to the input end of the input shaft, and the flange seat for connecting the motor is arranged on the end cover.

[0021] As an improved technical scheme, the shift valve is arranged on the shell, the shift valve is communicated with the pressure regulating valve, and the pressure regulating valve is communicated with the oil connector.

[0022] The shell is further provided with the lifting ring and the fixing seat.

[0023] After the above technical scheme is adopted, the beneficial effects of the present application are as follows.

[0024] The input shaft driven by the motor is arranged on the shell, the clutch assembly is driven by the input shaft, the middle shaft of the clutch assembly is rotatably arranged on the shell and extends to the outside of the shell at one end and is provided with the oil connector, the low-speed middle gear and the high-speed middle gear are arranged at the two ends of the middle shaft along the axial direction, the low-speed middle gear and the high-speed middle gear are respectively driven by the clutch assembly, the low-speed bottom gear is driven by the low-speed middle gear, the low-speed bottom gear is arranged on the output shaft, the output shaft is rotatably arranged on the shell and extends to the outside of the shell at both ends to form the output end, the high-speed bottom gear is arranged on the output shaft and is driven by the high-speed middle gear, the input shaft power input and the independent output of the high-speed and low-speed power states of the output shaft are realized by arranging the input shaft, the clutch assembly, the low-speed middle gear, the high-speed middle gear, the low-speed bottom gear and the high-speed bottom gear, and the low-speed and high-speed switching in the non-stop state can be realized by controlling the driving connection between the clutch assembly and the low-speed middle gear or the high-speed middle gear, and the operation is convenient.

[0025] The clutch assembly further comprises a clutch shell, the outer side of the clutch shell is in transmission connection with the input shaft, the inner side of the clutch shell is in transmission connection with two driving piece groups, the two driving piece groups are in clearance fit with the two friction piece groups respectively, the two friction piece groups are in transmission connection with the low-speed middle gear and the high-speed middle gear respectively; two pistons are further slidably arranged on the middle shaft, the two pistons are in communication with the oil connector, the two pistons correspond to the two driving piece groups respectively, springs are further compressed between the two pistons and the clutch shell respectively, when oil is filled into one of the pistons through the oil connector, the piston will compress the spring to move close to one of the driving piece groups, and the driving piece group is pushed to be in close contact with the friction piece group, since the outer side of the clutch shell is in transmission connection with the input shaft, and the inner side of the clutch shell is in transmission connection with the two driving piece groups, the input shaft can drive the clutch shell to rotate, the clutch shell drives the driving piece group to rotate, since the driving piece group is in close contact with the friction piece group, the friction piece group is further driven to rotate synchronously, thus the friction piece group can drive the low-speed middle gear or the high-speed middle gear to rotate, thereby realizing independent output of low-speed or high-speed power, at the same time, by controlling the other piston to move close to the other driving piece group through oil pressure, free switching between low-speed and high-speed can be realized without stopping, the operation strength is reduced, and the operation is more convenient.

[0026] The low-speed middle gear, the high-speed middle gear, the low-speed bottom gear, the high-speed bottom gear, the shell outer gear and the input gear all adopt the helical tooth grinding structure, the helical tooth grinding structure is designed on the gears in mutual meshing transmission, and the noise of transmission is reduced.

[0027] In conclusion, the novel speed reducer can realize free switching between high-speed and low-speed running states, and reduce the operation strength. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0029] Figure 1 It is a structural schematic view of the utility model;

[0030] Figure 2 It is a structural schematic view of the utility model from another angle direction;

[0031] Figure 3 It is a transmission structure schematic view of the novel speed reducer inside;

[0032] Figure 4 It is a transmission structure schematic view of the clutch assembly;

[0033] Reference numerals: 1. Housing; 2. Input shaft; 201. Input gear; 3. Clutch assembly; 301. Central shaft; 3011. First oil passage; 3012. Second oil passage; 3013. Third oil passage; 302. Clutch housing; 303. Drive plate assembly; 304. Friction plate assembly; 305. Piston; 3051. First chamber; 3052. Second chamber; 306. Spring; 307. External gear; 308. External gear of drive plate; 309. Internal gear of housing; 310. Internal gear of friction plate; 4. Oil connector; 5. Low-speed intermediate gear; 6. High-speed intermediate gear; 7. Low-speed bottom gear; 8. Output shaft; 9. High-speed bottom gear; 10. End cover; 11. Flange seat; 12. Shift valve; 13. Pressure regulating valve; 14. Lifting ring; 15. Fixed seat. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. However, the uses and purposes of these exemplary embodiments are only for illustrating the present invention and do not constitute any limitation on the actual protection scope of the present invention, nor are they intended to limit the protection scope of the present invention to these embodiments.

[0035] like Figures 1-4 As shown, a novel speed reducer includes a housing 1. An input shaft 2, which is driven and connected to a motor, is mounted on the housing 1. The input shaft 2 is driven and connected to a clutch assembly 3. The clutch assembly 3 includes a central shaft 301, which is rotatably mounted on the housing 1 via bearings. One end of the central shaft 301 extends to the outside of the housing 1 and is fitted with an oil connector 4. A low-speed intermediate gear 5 and a high-speed intermediate gear 6 are rotatably mounted at both ends of the central shaft 301 along the axial direction. In this embodiment, both the low-speed intermediate gear 5 and the high-speed intermediate gear 6 can rotate on the central shaft 301. The low-speed intermediate gear 5 and the high-speed intermediate gear 6 are driven and connected to the clutch assembly 3. The low-speed intermediate gear 5 is driven and connected to a low-speed bottom gear 7 via gear meshing. The low-speed bottom gear 7 is mounted on the output shaft 8, which is rotatably mounted on the housing 1 via bearings. Both ends of the output shaft 8 extend to the outside of the housing 1 and form output ends. The output shaft 8 is also equipped with a high-speed bottom gear 9, which is connected to the high-speed intermediate gear 6. By setting the input shaft 2, clutch assembly 3, low-speed intermediate gear 5, high-speed intermediate gear 6, low-speed bottom gear 7, and high-speed bottom gear 9, the input shaft 2 can input power and the output shaft 8 can output power in two states: high speed and low speed. At the same time, by operating the clutch assembly 3 to connect with the low-speed intermediate gear 5 or the high-speed intermediate gear 6, the low-speed and high-speed switching can be achieved without stopping the machine, making operation convenient.

[0036] In this embodiment, the connection method between the gear and the shaft is common in daily life and is common knowledge to those skilled in the art, so it will not be described in detail here.

[0037] Combination Figures 3-4As shown, the clutch assembly 3 further comprises a clutch shell 302, the outer side of the clutch shell 302 is in driving connection with the input shaft 2, the inner side of the clutch shell 302 is in driving connection with two driving piece groups 303, the two driving piece groups 303 are in clearance fit with two friction piece groups 304, power transmission can only be carried out when the driving piece groups 303 and the friction piece groups 304 are attached together, the two friction piece groups 304 are in driving connection with the low-speed intermediate gear 5 and the high-speed intermediate gear 6, that is, one friction piece group 304 is in driving connection with the low-speed intermediate gear 5, and the other friction piece group 304 is in driving connection with the high-speed intermediate gear 6, thus, the low-speed and high-speed power transmission is realized by the attachment of different driving piece groups 303 and friction piece groups 304.

[0038] In addition, the driving piece group 303 contains at least one driving piece, and the friction piece group 304 contains at least one friction piece, in the embodiment, the driving piece group 303 contains five driving pieces, and the friction piece group 304 contains five friction pieces, the driving pieces and the friction pieces are arranged in cross interval;

[0039] The intermediate shaft 301 further slidably has two pistons 305, the two pistons 305 are in communication with the oil connector 4, the two pistons 305 correspond to the two driving piece groups 303 respectively, the two pistons 305 further respectively compress springs 306 between the two pistons 305 and the clutch shell 302, the oil supply of the oil connector 4 realizes the movement of the two pistons 305 in different directions, thereby compressing the springs 306, and making the corresponding driving piece groups 303 and the friction piece groups 304 attached, realizing the power transmission and the switching of high and low speed power, when there is no oil, the pistons 305 return to the initial position under the action of the springs 306;

[0040] Thus, when one of the pistons 305 is filled with oil pressure through the oil connector 4, the piston 305 will compress the spring 306 to approach one of the driving piece groups 303, and push the driving piece group 303 to attach with the friction piece group 304, since the outer side of the clutch shell 302 is in driving connection with the input shaft 2, and the inner side of the clutch shell 302 is in driving connection with the two driving piece groups 303, therefore, the input shaft 2 can drive the clutch shell 302 to rotate, the clutch shell 302 drives the driving piece group 303 to rotate, since the driving piece group 303 is attached with the friction piece group 304, thereby driving the friction piece group 304 to rotate synchronously, thus, the friction piece group 304 can drive the low-speed intermediate gear 5 or the high-speed intermediate gear 6 to rotate, thereby realizing the independent output of low-speed or high-speed power, at the same time, by controlling the other piston 305 to approach the other driving piece group 303 through oil pressure, the free switching of low-speed and high-speed can be realized without stopping, which reduces the strength of operation, and the operation is more convenient.

[0041] In combination Figures 3-4As shown, the outer side of the clutch housing 302 is provided with a housing outer gear 307, and the input shaft 2 is provided with an input gear 201, the input gear 201 and the housing outer gear 307 are connected through gear meshing transmission, and the housing outer gear 307 and the input gear 201 are arranged to realize the power transmission between the input shaft 2 and the clutch housing 302.

[0042] In combination Figures 3-4 As shown, the housing outer gear 307 and the clutch housing 302 are an integral structure or are connected through a key groove;

[0043] The input gear 201 and the input shaft 2 are an integral structure or are connected through a key groove, and the housing outer gear 307 and the clutch housing 302 are designed as an integral structure, and the input gear 201 and the input shaft 2 are designed as an integral structure, which simplifies the process and is convenient to assemble.

[0044] In combination Figures 3-4 As shown, the low-speed middle gear 5, the high-speed middle gear 6, the low-speed bottom gear 7, the high-speed bottom gear 9, the housing outer gear 307 and the input gear 201 all adopt a helical tooth grinding structure, and the gears meshing with each other are designed to adopt a helical tooth grinding structure, which reduces the noise of transmission.

[0045] In combination Figures 3-4 As shown, the outer periphery of the driving piece group 303 is arranged with a driving piece outer gear 308, and the inner side of the clutch housing 302 is arranged with a housing inner gear 309, the housing inner gear 309 and the driving piece outer gear 308 are in meshing transmission, and the driving piece outer gear 308 and the housing inner gear 309 are arranged to realize the power transmission between the clutch housing 302 and the driving piece group 303.

[0046] The inner side of the friction piece group 304 is arranged with a friction piece inner gear 310, the friction piece inner gear 310 is respectively in meshing transmission with the low-speed middle gear 5 and the high-speed middle gear 6, and the friction piece inner gear 310 is arranged to realize the power transmission between the friction piece group 304 and the low-speed middle gear 5 and the high-speed middle gear 6.

[0047] In combination Figures 3-4As shown, the two pistons 305 are respectively provided with first chamber 3051 and second chamber 3052, the middle shaft 301 is provided with first oil channel 3011, second oil channel 3012 and third oil channel 3013, the first oil channel 3011, the second oil channel 3012 and the third oil channel 3013 are all communicated with the oil joint 4, the first oil channel 3011 is communicated with the first chamber 3051 at the end away from the oil joint 4, the second oil channel 3012 is communicated with the second chamber 3052 at the end away from the oil joint 4, the third oil channel 3013 is communicated with the driving piece group 303 and the friction disc group 304 at the end away from the oil joint 4, the first oil channel 3011 is communicated with the first chamber 3051 at the end away from the oil joint 4, the second oil channel 3012 is communicated with the second chamber 3052 at the end away from the oil joint 4, the third oil channel 3013 is communicated with the driving piece group 303 and the friction disc group 304 at the end away from the oil joint 4, by communicating the first oil channel 3011 with oil, one of the pistons 305 can be driven to move to the left side, realizing low speed transmission, by communicating the second oil channel 3012 with oil, the other piston 305 can be driven to move to the right side, realizing high speed transmission, by communicating the third oil channel 3013 with oil, the driving piece group 303 and the friction disc group 304 can be lubricated, and there is also a certain oil return function, and the main oil return is realized through the bottom of the shell 1 and the oil return pipe communicated with the bottom.

[0048] In combination Figures 2-3 As shown, the end cover 10 is installed on the shell 1 and close to the input end of the input shaft 2, the end cover 10 is provided with the flange seat 11 for connecting the motor, and the flange seat 11 is convenient for connecting and fixing with the motor.

[0049] In combination Figures 1-2 As shown, the gear shift valve 12 is installed on the shell 1, the gear shift valve 12 is communicated with the pressure regulating valve 13, and the pressure regulating valve 13 is communicated with the oil joint 4.

[0050] The shell 1 is also provided with the lifting ring 14 and the fixing seat 15.

[0051] In order to facilitate understanding, the working process of the embodiment is described as follows:

[0052] As shown, Figures 1-4 Firstly, the output shaft 8 of the motor is connected with the input shaft 2 of the accelerator through the spline, the motor drives the input shaft 2 to rotate, the input shaft 2 drives the clutch shell 302 to rotate through the input gear 201 and the shell outer gear 307, the clutch shell 302 drives the driving piece group 303 to rotate through the shell inner gear 309 and the driving piece outer gear 308 in the rotating process, since there is a gap between the driving piece group 303 and the friction disc group 304, the speed reducer is in the neutral state at this time.

[0053] Afterwards, the hydraulic oil enters into the oil joint 4 by the pressure regulating valve 13, and then enters into the first chamber 3051 of one of the pistons 305 through the first oil passage 3011 in the middle shaft 301, under the action of the hydraulic oil, the piston 305 compresses the spring 306 to move to the direction of the low-speed intermediate gear 5, and pushes the driving piece group 303 in the direction of the low-speed intermediate gear 5 to adhere and press the friction piece group 304, when the driving piece group 303 adheres and presses the friction piece group 304, the driving piece group 303 will drive the friction piece group 304 to rotate synchronously, the friction piece group 304 is engaged with the low-speed intermediate gear 5 through the friction piece internal gear 310 arranged on the inner side, and drives the low-speed intermediate gear 5 to rotate, the low-speed intermediate gear 5 drives the low-speed bottom gear 7 to rotate through gear engagement, since the low-speed bottom gear 7 is installed on the output shaft 8 through the key, thereby driving the output shaft 8 to rotate at low speed, so as to realize low-speed power transmission.

[0054] When the hydraulic oil enters into the second chamber 3052 of the other piston 305 through the second oil passage 3012 in the middle shaft 301, under the action of the hydraulic oil, the piston 305 compresses the spring 306 to move to the direction of the high-speed intermediate gear 6, and pushes the driving piece group 303 in the direction of the high-speed intermediate gear 6 to adhere and press the friction piece group 304, when the driving piece group 303 adheres and presses the friction piece group 304, the driving piece group 303 will drive the friction piece group 304 to rotate synchronously, the friction piece group 304 is engaged with the high-speed intermediate gear 6 through the friction piece internal gear 310 arranged on the inner side, and drives the high-speed intermediate gear 6 to rotate, the high-speed intermediate gear 6 drives the high-speed bottom gear 9 to rotate through gear engagement, since the high-speed bottom gear 9 is installed on the output shaft 8 through the key, thereby driving the output shaft 8 to rotate at high speed, so as to realize high-speed power transmission.

[0055] Thus, the low-speed transmission and the high-speed transmission of the speed reducer are independently output, and the low-speed state and the high-speed state can be switched through the movement of the two pistons 305 without stopping.

[0056] In conclusion, the novel speed reducer can realize free switching in the high-speed running state and the low-speed running state, and reduces the operation strength.

[0057] It should be understood that the use of these embodiments is only for illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A new type of speed reducer characterized by: The utility model provides a transmission mechanism of the motor vehicle, including the casing, install with the input shaft with motor drive connection on casing, input shaft drive connection clutch assembly, clutch assembly includes the middle axle, the middle axle rotates and is installed on casing, and one end extends to the outside of casing, and is installed with oil joint, the both ends of middle axle along the axial direction respectively rotates and is installed with low speed middle gear and high speed middle gear, low speed middle gear and high speed middle gear are driven connection respectively with clutch assembly, low speed middle gear drive connection low speed bottom gear, low speed bottom gear is installed on output shaft, output shaft rotates and is installed on casing, and both ends respectively extend to the outside of casing, and form output end, output shaft still is installed with high speed bottom gear, high speed bottom gear is driven connection with high speed middle gear.

2. A new type of speed reducer as claimed in claim 1, characterized in that: The clutch assembly further includes a clutch housing, the outer side of the clutch housing is in transmission connection with the input shaft, the inner side of the clutch housing is in relative transmission connection with two driving piece groups, the two driving piece groups are in gap cooperation with two friction piece groups respectively, and the two friction piece groups are in transmission connection with the low speed middle gear and the high speed middle gear respectively. The middle axle is further provided with two pistons which are in communication with the oil joint, and the two pistons correspond to the two driving piece groups respectively, and springs are further compressed between the two pistons and the clutch housing respectively.

3. A new type of speed reducer as claimed in claim 2, characterized in that: The outer side of the clutch housing is provided with a housing outer gear, and the input shaft is provided with an input gear, the input gear is in transmission connection with the housing outer gear through gear meshing.

4. A new type of speed reducer as claimed in claim 3, characterized in that: The housing outer gear and the clutch housing are in one-piece structure or are connected through a key groove. The input gear and the input shaft are in one-piece structure or are connected through a key groove.

5. A new type of speed reducer as claimed in claim 3, characterized in that: The low speed middle gear, the high speed middle gear, the low speed bottom gear, the high speed bottom gear, the housing outer gear and the input gear all adopt helical tooth grinding structure.

6. A new type of speed reducer as claimed in claim 2, characterized in that: The outer periphery of the driving piece group is provided with a driving piece outer gear, the inner side of the clutch housing is provided with a housing inner gear, and the housing inner gear is in transmission connection with the driving piece outer gear through meshing. The inner side of the friction piece group is provided with a friction piece inner gear, and the friction piece inner gear is in transmission connection with the low speed middle gear and the high speed middle gear respectively.

7. A new type of speed reducer as claimed in claim 2, characterized in that: The two pistons are respectively provided with a first cavity and a second cavity, the middle axle is provided with a first oil channel, a second oil channel and a third oil channel, the first oil channel, the second oil channel and the third oil channel are all in communication with the oil joint, one end of the first oil channel far away from the oil joint is in communication with the first cavity, one end of the second oil channel far away from the oil joint is in communication with the second cavity, and one end of the third oil channel far away from the oil joint is in communication with the driving piece group and the friction piece group.

8. A new type of speed reducer as claimed in claim 1, characterized in that: An end cover is installed on the casing and close to the input end of the input shaft, and a flange seat for connecting the motor is arranged on the end cover.

9. A new type of speed reducer as claimed in claim 1, characterized in that: A shift valve is installed on the casing, the shift valve is in communication with a pressure regulating valve, and the pressure regulating valve is in communication with the oil joint. A lifting ring and a fixing seat are further installed on the casing.

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