Gear transmission assembly for motor tricycle

Abstract

The utility model provides a gear transmission assembly for a motor tricycle, which relates to the technical field of transmissions, and comprises a box body, the box body consists of a middle box body, a clutch box body and a rear box body, the clutch box body and the rear box body are respectively arranged at two ends of the middle box body, and a raised circulating gear shifting box body is arranged above the middle box body; the shaft assembly is installed in the middle box body, the clutch box body and the rear box body, the shaft assembly comprises an input shaft assembly, an output shaft assembly and a middle shaft assembly, and synchronizers are arranged on the input shaft assembly, the output shaft assembly and the middle shaft assembly; the synchronizer arranged on the intermediate shaft assembly is further provided with an outer gear participating in gear transmission. The transmission case has the advantages that the case body is spliced in a three-section mode, the number of transmission gears is reduced due to the long-input-shaft and short-output-shaft structure, the overall structure is more compact, the space size and weight are reduced, the structural strength is improved, the transmission efficiency is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of transmission, especially relates to a gear transmission assembly for three-wheeled motorcycle. BACKGROUND

[0002] The transmission is one of the core components of the automobile power transmission system, and is mainly used for adjusting the matching of the engine output power and the rotating speed.

[0003] The authorized patent with the publication number CN222097850U discloses a multi-stage gear transmission device for three-wheeled motorcycle, and belongs to the technical field of motorcycle transmission, which comprises a first shifter and a second shifter, the first shifter is connected with a gear shifting swing rod, the gear shifting swing rod has a first gear shifting yoke and a second gear shifting yoke, the first gear shifting yoke is in abutment with a first gear shifting lever, the second gear shifting yoke is in abutment with a second gear shifting lever or a third gear shifting lever, the gear shifting swing rod has a first working state, a second working state and a third working state, and the second shifter drives the gear shifting swing rod to switch between the three working states.

[0004] In the prior art represented by the above patent, at least the following problems exist:

[0005] The multiple shifters and gear shifting mechanisms increase the overall axial size of the device and the space layout is not compact enough. INVENTION CONTENTS

[0006] The utility model provides a gear transmission assembly for three-wheeled motorcycle for solving the above technical problems.

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme: a gear transmission assembly for three-wheeled motorcycle, comprising:

[0008] The box body is composed of a middle box body, a clutch box body and a rear box body, the clutch box body and the rear box body are respectively installed at both ends of the middle box body, and a convex circulating gear shifting box body is arranged above the middle box body.

[0009] The shaft assembly is installed in the middle box body, the clutch box body and the rear box body, and the shaft assembly comprises an input shaft assembly, an output shaft assembly and an intermediate shaft assembly, a synchronizer is arranged on each of the input shaft assembly, the output shaft assembly and the intermediate shaft assembly, and an external gear participating in gear transmission is further arranged on the synchronizer arranged on the intermediate shaft assembly.

[0010] Further, it further comprises:

[0011] The rotating drum is installed inside the circulating gear shifting box body, and the rotating drum is connected with the synchronizer through a plurality of gear shifting forks of different gears.

[0012] Further, the shaft assembly comprises:

[0013] An input shaft is installed in the middle box body and the clutch box body;

[0014] An input shaft high-speed synchronizer is installed on the input shaft, and the input shaft high-speed synchronizer is connected with the three-fourth gear shift fork connected with the rotating drum for adjusting the three-fourth gear shift position, and a three-gear gear and a four-gear gear are respectively connected at both ends of the input shaft high-speed synchronizer.

[0015] An input shaft overspeed synchronizer is installed on the input shaft, and the input shaft overspeed synchronizer is connected with the five-sixth gear shift fork connected with the rotating drum for adjusting the five-sixth gear shift position, and an input shaft five-gear gear and an input shaft six-gear gear are respectively connected at both ends of the input shaft overspeed synchronizer.

[0016] Further, the shaft assembly further comprises:

[0017] An output shaft is installed in the rear box body, and the output shaft is coaxially arranged with the input shaft;

[0018] An output shaft high-low speed synchronizer is installed on the output shaft, and an output shaft low-speed transmission gear and an output shaft high-speed transmission gear are respectively connected at both ends of the output shaft high-low speed synchronizer.

[0019] Further, the shaft assembly further comprises:

[0020] A middle shaft is installed in the middle box body;

[0021] A middle shaft low-speed synchronizer is installed on the middle shaft, and a first-gear gear and a second-gear gear are connected at both ends of the middle shaft low-speed synchronizer;

[0022] A high-gear drive gear is installed on the middle shaft, and the high-gear drive gear is engaged with the output shaft high-speed transmission gear;

[0023] A middle shaft five-gear gear is fixedly installed on the middle shaft, and the middle shaft five-gear gear is engaged with the input shaft five-gear gear;

[0024] A middle shaft six-gear gear is fixedly installed on the middle shaft, and the middle shaft six-gear gear is engaged with the input shaft six-gear gear.

[0025] Further, the shaft assembly further comprises:

[0026] A power take-off output shaft is installed in the rear box body, and a power take-off transmission gear is installed on the power take-off output shaft;

[0027] A power take-off yoke is installed in the rear box body, and a power take-off yoke is installed on the power take-off yoke.

[0028] Further, the clutch yoke assembly comprises:

[0029] A clutch release bearing is sleeved on the clutch box body;

[0030] A clutch yoke shaft assembly is installed on the clutch box body, and the clutch yoke shaft assembly is connected with the clutch release bearing through a torsional spring;

[0031] A clutch rotating arm is installed on one end of the clutch yoke shaft assembly.

[0032] Further, it further comprises:

[0033] A reverse idle gear shaft is installed between the clutch box body and the intermediate box body, the reverse idle gear shaft is arranged on the side of the input shaft away from the intermediate shaft, and a reverse idle gear is sleeved on the reverse idle gear shaft.

[0034] Further, it further comprises:

[0035] A high-low gear and reverse gear shifting assembly is installed above the intermediate box body, a high-low gear shifting fork is arranged at one end of the high-low gear and reverse gear shifting assembly close to the output shaft, the high-low gear shifting fork is connected with the output shaft high-low speed synchronizer, a reverse gear shifting fork is arranged at one end of the high-low gear and reverse gear shifting assembly away from the output shaft, and the reverse gear shifting fork is connected with the reverse idle gear.

[0036] Further, it further comprises:

[0037] A gear shifting block assembly is installed in the circulating gear shifting box body, and the gear shifting block assembly is located on the side of the rotating drum away from the output shaft.

[0038] According to the above technical scheme, the gear shifting assembly for the three-wheeled motorcycle has the following beneficial effects:

[0039] 1. The three-section distribution of the box body improves the structural strength of the box body, the long input shaft and short output shaft structure improves the strength of the input shaft, the output shaft high-speed transmission gear is arranged on the output shaft as the main reduction gear, the intermediate shaft low-speed synchronizer is arranged on the intermediate shaft, the three-fourth gear synchronizer and the fifth-sixth gear synchronizer are arranged on the side of the input shaft close to the output shaft, the layout is balanced, the structure is compact, and vibration is reduced.

[0040] 2. The outer meshing teeth are arranged on the outer circle of the intermediate shaft low-speed synchronizer tooth sleeve, and one transmission gear is reduced.

[0041] 3. The output shaft high speed transmission gear is compatible with the constant engagement transmission gear and idler function, reducing one transmission gear;

[0042] 4. The above scheme reduces the number of transmission gears, making the overall structure more compact, reducing the space volume and weight, improving the structural strength, improving the transmission efficiency and service life. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0044] Fig. 1 The overall internal structure diagram provided by the embodiment of the present application;

[0045] Fig. 2 The overall external structure diagram provided by the embodiment of the present application;

[0046] Fig. 3 The overall internal structure of the embodiment of the present application is improved.

[0047] In the figure: 101 - middle box; 102 - clutch box; 103 - rear box; 104 - circulating gear shift box; 2 - rotating drum; 202 - three-four gear shift fork; 203 - five-six gear shift fork; 501 - input shaft; 502 - input shaft high speed synchronizer; 5021 - three gear; 5022 - four gear; 503 - input shaft overspeed synchronizer; 5031 - input shaft five gear; 5032 - input shaft six gear; 601 - output shaft; 603 - output shaft high-low speed synchronizer; 6031 - output shaft low speed transmission gear; 6032 - output shaft high speed transmission gear; 701 - intermediate shaft; 702 - intermediate shaft low speed synchronizer; 7021 - first gear; 7022 - second gear; 703 - high gear drive gear; 704 - intermediate shaft five gear; 705 - intermediate shaft six gear; 801 - clutch separating bearing; 802 - clutch pull fork shaft assembly; 803 - clutch rotating arm; 901 - power take-off output shaft; 9011 - power take-off transmission gear; 902 - power take-off pull fork shaft; 10 - reverse idle gear shaft; 1001 - reverse idle gear; 11 - shift knob assembly. DETAILED DESCRIPTION

[0048] The embodiments of the present application will be described in detail below with reference to the drawings.

[0049] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0051] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Embodiment:

[0053] In order to solve the above technical problems, as Figs. 1-3As shown, the embodiment provides a gear transmission assembly for a three-wheeled motorcycle, comprising: a box body composed of a middle box body 101, a clutch box body 102 and a rear box body 103, the clutch box body 102 and the rear box body 103 are respectively installed at both ends of the middle box body 101, and a raised circulating gear shift box body 104 is arranged above the middle box body 101; a shaft assembly, comprising an input shaft assembly, an output shaft assembly, an intermediate shaft assembly and a power take-off output shaft assembly, the input shaft assembly is installed in the middle box body 101 and the clutch box body 102, the output shaft assembly is installed in the rear box body 103, the input shaft assembly and the output shaft assembly are coaxially arranged, the intermediate shaft assembly is installed in the middle box body 101, the intermediate shaft assembly is arranged in parallel with the input shaft assembly and the output shaft assembly, the power take-off output shaft assembly is installed in the rear box body 103, and the power take-off output shaft assembly is arranged on the side of the intermediate shaft assembly away from the input shaft assembly; a rotating drum 2 is installed inside the circulating gear shift box body 104, the rotating drum 2 is connected with the input shaft assembly, the output shaft assembly and the intermediate shaft assembly through a plurality of shift forks 201 of different gears; a clutch pull fork assembly is installed outside the clutch box body 102; a high-low and reverse gear shift assembly is installed on the middle box body 101, a high-low gear shift fork 3 is arranged at one end of the high-low and reverse gear shift assembly close to the output shaft assembly, and a reverse gear shift fork 4 is arranged at one end of the high-low and reverse gear shift assembly away from the output shaft assembly.

[0054] The box is composed of a middle box, a clutch box and a rear box. A raised circulation gear shift box is further arranged above the middle box to provide support and protection for the internal structure and support for the structure installed outside the box. The input shaft 501 and the output shaft 601 are coaxially arranged, the length of the input shaft 501 is longer than that of the output shaft 601, and the input shaft 501 and the output shaft 601 are arranged in parallel with the intermediate shaft 701. The rotary drum 2 is installed in the circulation gear shift box 104 and arranged above the intermediate shaft assembly. The power take-off output shaft assembly is arranged on the side of the intermediate shaft assembly away from the input shaft assembly. The clutch yoke assembly is arranged at the end of the input shaft 501 away from the output shaft 601 and installed outside the clutch box 102. The high-low gear reverse gear shift assembly is installed on the middle box 101. The power output by the engine is transmitted to the input shaft assembly and then transmitted to the output shaft assembly through gear engagement, and the intermediate shaft assembly assists in completing power transmission. The operation of the rotary drum 2 drives the shift fork of different gears to move. When the shift fork moves, the synchronizer moves to drive the corresponding gears on the input shaft assembly, the output shaft assembly and the intermediate shaft assembly to rotate synchronously, realizing power output of different gears. When the clutch yoke assembly moves, the clutch can be separated and combined to complete the interruption or connection of power. When the transmission needs to drive additional equipment, the power take-off output shaft assembly can obtain power from the intermediate shaft assembly and then transmit it out. The high-low gear shift fork is used to realize the switching of high-low gears, and the reverse gear shift fork 4 is used to realize reverse gear.

[0055] Further, as shown in Figs. 1-3 The input shaft assembly includes:

[0056] The input shaft 501 is installed in the middle box 101 and the clutch box 102.

[0057] The input shaft high-speed synchronizer 502 is installed on the input shaft 501 and connected with the shift fork 201 of the third and fourth gears connected with the rotary drum 2. The third gear 5021 and the fourth gear 5022 are respectively connected at both ends of the input shaft high-speed synchronizer 502.

[0058] The input shaft overspeed synchronizer 503 is installed on the input shaft 501 and connected with the shift fork 201 of the fifth and sixth gears connected with the rotary drum 2. The input shaft fifth gear 5031 and the input shaft sixth gear 5032 are respectively connected at both ends of the input shaft overspeed synchronizer 503.

[0059] When the rotating drum 2 rotates, the third / fourth gear shift fork 202 or the fifth / sixth gear shift fork 203 is driven to move, so that the input shaft high-speed synchronizer 502 drives the third gear 5021 or the fourth gear 5022 to rotate synchronously with the input shaft 501, or the input shaft overspeed synchronizer 503 drives the input shaft fifth gear 5031 or the input shaft sixth gear 5032 to rotate synchronously with the input shaft 501, so as to realize power transmission of different gears. The input shaft 501 is a power input component of the transmission, which receives power provided by the engine and transmits it to other components. The input shaft high-speed synchronizer 502 and the overspeed synchronizer 503 cooperate with gears of different gears, so as to smoothly realize output of different gear powers of the input shaft 501, so that the vehicle can obtain more matched power output during driving.

[0060] Further, as shown in Figs. 1-3 the output shaft assembly comprises:

[0061] an output shaft 601 installed in the rear box body 103, the output shaft 601 being coaxially arranged with the input shaft 501;

[0062] an output shaft high / low speed synchronizer 603 installed on the output shaft 601, the output shaft high / low speed synchronizer 603 being connected with an output shaft low speed transmission gear 6031 and an output shaft high speed transmission gear 6032 at two ends respectively.

[0063] When the high / low gear shift fork 3 works, it will drive the output shaft high / low speed synchronizer 603 to connect gears of different gears. When it is needed to switch to a high speed gear, the output shaft high / low speed synchronizer 603 is actuated to connect the output shaft high speed transmission gear 6031, so as to drive the output shaft 601 to rotate, realizing power transmission of the high speed gear. When it is needed to switch to a low speed gear, the output shaft high / low speed synchronizer 603 is actuated to connect the output shaft low speed transmission gear 6032, so as to drive the output shaft 601 to rotate, realizing power output of the low speed gear.

[0064] Further, as shown in Figs. 1-3 the intermediate shaft assembly comprises:

[0065] an intermediate shaft 701 installed in the middle box body 101;

[0066] an intermediate shaft low speed synchronizer 702 installed on the intermediate shaft 701, the intermediate shaft low speed synchronizer 702 being connected with a first gear 7021 and a second gear 7022 at two ends;

[0067] a high gear drive gear 703 installed on the intermediate shaft 701, the high gear drive gear 703 being engaged with the output shaft high speed transmission gear 6032;

[0068] The intermediate shaft fifth gear 704 is fixedly installed on the intermediate shaft 701, and the intermediate shaft fifth gear 704 is engaged with the input shaft fifth gear 5031.

[0069] The intermediate shaft sixth gear 705 is fixedly installed on the intermediate shaft 701, and the intermediate shaft sixth gear 705 is engaged with the input shaft sixth gear 5032.

[0070] The engine power is transmitted to the input shaft 501, and the gears on the input shaft 501 drive the output shaft 601 to rotate to realize power output through the engagement with the corresponding gears on the intermediate shaft 701 and the output shaft 601. When the rotating drum 2 drives the intermediate shaft 701 synchronizer shaft to move axially, the power transmission of the low-speed gear is realized; the intermediate shaft synchronizer is used to ensure the synchronization of the gears during gear shifting, and the power transmission switching of the first and second gears is realized.

[0071] Further, as shown in the figure, Figs. 1-3 The clutch puller assembly includes:

[0072] The clutch release bearing 801 is sleeved on the clutch housing 102;

[0073] The clutch puller shaft assembly 802 is installed outside the clutch housing 102, and the clutch puller shaft assembly 802 is connected with the clutch release bearing 801 through a torsional spring;

[0074] The clutch rotating arm 803 is installed at one end of the clutch puller shaft assembly 802.

[0075] The clutch rotating arm 803 rotates to drive the clutch puller shaft assembly 802 to rotate around its own axis, thereby realizing the operation of disengaging and engaging the clutch.

[0076] Further, as shown in the figure, Figs. 1-3 The power take-off output shaft assembly includes:

[0077] The power take-off output shaft 901 is installed in the rear housing 103, and the power take-off transmission gear 9011 is installed on the power take-off output shaft 901;

[0078] The power take-off puller shaft 902 is installed in the rear housing 103, and the power take-off puller 9021 is installed on the power take-off puller shaft 902, and the power take-off puller 9021 is sleeved on the power take-off transmission gear 9011.

[0079] The power take-off puller 9021 is sleeved on the power take-off transmission gear 9011.

[0080] Further, as shown in Figs. 1-3 Further, as shown in

[0081] The reverse shift fork 4 drives the reverse idler gear 1001 to move axially on the reverse idler gear shaft 10, realizing the reverse driving of the vehicle; when the reverse is not needed, the reverse shift fork 4 drives the reverse idler gear 1001 to move to a position separated from other gears, interrupting the power transmission, the reverse idler gear 1001 idles on the reverse idler gear shaft 10 without engaging with any gear and participating in the power transmission, ensuring the independent control of the reverse, the reverse idler gear 1001 is used to intervene in the transmission chain between the input shaft 501 and the intermediate shaft 701, changing the direction of power transmission.

[0082] Further, as shown in Figs. 1-3 Further, as shown in

[0083] The shift block assembly 11 is used to drive the rotary drum to rotate, ensuring the accuracy of the shift operation.

[0084] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gear transmission assembly for a three-wheeled motorcycle, characterized by, The utility model relates to a kind of gearbox, including: Box, by middle box (101), clutch box (102) and rear box (103) are composed, the clutch box (102) and the rear box (103) are installed in the middle box (101) both ends respectively, the middle box (101) top is equipped with the protruding cycle gear shift box (104); Shaft assembly, installed in the middle box (101), the clutch box (102) and the rear box (103) inside, the shaft assembly includes input shaft assembly, output shaft assembly and intermediate shaft assembly, the input shaft assembly, the output shaft assembly and the intermediate shaft assembly are all provided with synchronizer, the synchronizer on the intermediate shaft assembly is also provided with outer gear to participate in gear transmission.

2. A gear change assembly for a three-wheeled motorcycle as claimed in claim 1 wherein, Also including: Rotary drum (2), installed in cycle gear shift box (104) inside, the rotary drum (2) is connected with the synchronizer by multiple different gear shift fork (201).

3. A gear change assembly for a three-wheeled motorcycle as claimed in claim 2, wherein, The input shaft assembly includes: Input shaft (501), installed in the middle box (101) and the clutch box (102) inside; Input shaft high-speed synchronizer (502), installed on the input shaft (501), the input shaft high-speed synchronizer (502) is connected with three four gear shift fork (202) for adjusting three four gears connected with the rotary drum (2), three gear (5021) and four gear (5022) are connected in the input shaft high-speed synchronizer (502) both ends respectively; Input shaft overspeed synchronizer (503), installed on the input shaft (501), the input shaft overspeed synchronizer (503) is connected with five six gear shift fork (203) for adjusting five six gears connected with the rotary drum (2), input shaft five gear (5031) and input shaft six gear (5032) are connected in the input shaft overspeed synchronizer (503) both ends respectively.

4. A gear change assembly for a three-wheeled motorcycle as claimed in claim 3 wherein, The output shaft assembly also includes: Output shaft (601), installed in the rear box (103), the output shaft (601) is coaxial with the input shaft (501) arrangement; Output shaft high-low speed synchronizer (603), installed on the output shaft (601), the output shaft high-low speed synchronizer (603) both ends are connected with output shaft low speed transmission gear (6031) and output shaft high speed transmission gear (6032) respectively.

5. A gear change assembly for a three-wheeled motorcycle as claimed in claim 4 wherein, The intermediate shaft assembly also includes: Intermediate shaft (701), installed in the middle box (101); Intermediate shaft low speed synchronizer (702), installed on the intermediate shaft (701), the intermediate shaft low speed synchronizer (702) both ends are connected with one gear (7021) and two gear (7022); High gear drive gear (703), installed on the intermediate shaft (701), the high gear drive gear (703) is engaged with the output shaft high speed transmission gear (6032); Intermediate shaft five gear (704), fixedly installed on the intermediate shaft (701), the intermediate shaft five gear (704) is engaged with the input shaft five gear (5031); The intermediate shaft six-gear gear (705) is fixedly installed on the intermediate shaft (701), and is engaged with the input shaft six-gear gear (5032).

6. A gear change assembly for a three-wheeled motorcycle as claimed in claim 5 wherein, The shaft assembly further comprises: The power take-off output shaft (901) is installed in the rear box body (103), and the power take-off transmission gear (9011) is installed on the power take-off output shaft (901); The power take-off yoke shaft (902) is installed in the rear box body (103), and the power take-off yoke (9021) is installed on the power take-off yoke shaft (902), and the power take-off yoke (9021) is sleeved on the power take-off transmission gear (9011).

7. A gear change assembly for a three-wheeled motorcycle as claimed in claim 6 wherein, Further comprising a clutch yoke assembly, the clutch yoke assembly comprising: The clutch release bearing (801) is sleeved on the clutch box body (102); The clutch yoke shaft assembly (802) is installed outside the clutch box body (102), and the clutch yoke shaft assembly (802) is connected with the clutch release bearing (801) through a torsional spring; The clutch yoke shaft assembly (802) is installed outside the clutch box body (102), and the clutch yoke shaft assembly (802) is connected with the clutch release bearing (801) through a torsional spring; 8. A gear change assembly for a three-wheeled motorcycle as claimed in claim 7, wherein, The reverse idler gear shaft (10) is installed between the clutch box body (102) and the middle box body (101), and the reverse idler gear shaft (10) is arranged on the side of the input shaft (501) away from the intermediate shaft (701), and the reverse idler gear (1001) is sleeved on the reverse idler gear shaft (10). Further comprising:

9. A gear change assembly for a three-wheeled motorcycle as claimed in claim 8, characterised in that, The high-low-reverse shift assembly is installed above the middle box body (101), and the high-low-reverse shift assembly is provided with a high-low shift fork (3) on the side close to the output shaft (601), the high-low shift fork (3) is connected with the output shaft high-low speed synchronizer (603), and the high-low-reverse shift assembly is provided with a reverse shift fork (4) on the side away from the output shaft (601), and the reverse shift fork (4) is connected with the reverse idler gear (1001). Further comprising:

10. A gear change assembly for a three-wheeled motorcycle as claimed in claim 9, wherein, The shift block assembly (11) is installed in the circulating shift box body (104), and the shift block assembly (11) is located on the side of the rotating drum (2) away from the output shaft (601). ​

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