A large speed ratio transmission and automobile

Abstract

The invention discloses a large-speed ratio transmission and a car, comprising a clutch housing, a transmission housing, a front auxiliary case, a main case and a rear auxiliary case; a shaft, a front auxiliary case intermediate shaft and a front auxiliary case shift fork shaft are arranged in the front auxiliary case, a front auxiliary case input gear is sleeved on the rear end of the shaft, and the front auxiliary case input gear is connected to the front auxiliary case intermediate shaft via the front auxiliary case intermediate shaft gear; two shafts and a main case intermediate shaft are arranged in the main case, the front end of the two shafts is coaxially connected to the rear end of the shaft via a hollow shaft, and a gear seat is connected to the end of the hollow shaft close to the shaft; the two shafts are connected to the intermediate shaft transmission gear via the shaft gear, and the intermediate shaft transmission gear is sleeved on the main case intermediate shaft; the main case intermediate shaft is coaxially connected to the front auxiliary case intermediate shaft; a front auxiliary case sliding sleeve is sleeved on the rear end of the shaft, and the front auxiliary case sliding sleeve is connected to the front auxiliary case shift fork arranged on the front auxiliary case shift fork shaft, and the front auxiliary case sliding sleeve can move axially along the shaft under the drive of the front auxiliary case shift fork, and is connected to the front auxiliary case input gear or the gear seat.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile transmission, relates to a transmission, and in particular to a large speed ratio transmission and an automobile. Background Art

[0002] With the continuous development of the commercial vehicle market, some special operation vehicles require the transmission to have a large first gear ratio to achieve the purpose of low-speed driving. For example, the first gear ratio of the transmission for road construction vehicles must be above 26. The commonly used high-speed ratio transmission in the prior art usually adopts a main and auxiliary box double intermediate shaft structure, with three rows of gears and two sets of cylinders in the auxiliary box. Its defects are: complex structure, large number of parts and high cost. Therefore, it is urgent to develop a high-speed ratio transmission with simple structure and small number of parts for special operation vehicles. Summary of the invention

[0003] In view of the technical problems existing at this stage, the purpose of the present invention is to provide a high-speed ratio transmission and a vehicle to solve the technical problems of complex structure and high cost of high-speed ratio transmissions in the prior art.

[0004] In order to achieve the above object, the present invention discloses the following technical solutions:

[0005] A high-speed ratio transmission, comprising a clutch housing, a transmission housing, a front auxiliary housing, a main housing and a rear auxiliary housing; the front auxiliary housing is located in a cavity formed by the clutch housing and the front end of the transmission housing, and the main housing and the rear auxiliary housing are sequentially connected from front to back and arranged in the transmission housing;

[0006] A shaft, a front auxiliary box intermediate shaft and a front auxiliary box shift fork shaft are arranged in the front auxiliary box, a front auxiliary box input gear is sleeved on the rear end of the shaft, and the front auxiliary box input gear is connected to the front auxiliary box intermediate shaft via the front auxiliary box intermediate shaft gear;

[0007] The main box is provided with two shafts and a main box intermediate shaft, the front end of the two shafts is coaxially connected with the rear end of the one shaft via a hollow shaft, and the end of the hollow shaft close to the one shaft is connected with a gear seat; the two shafts are connected with the intermediate shaft transmission gear via a shaft gear, and the intermediate shaft transmission gear is sleeved on the main box intermediate shaft; the main box intermediate shaft is coaxially connected with the front auxiliary box intermediate shaft;

[0008] A front auxiliary box sliding sleeve is provided at the rear end sleeve of the first shaft, and the front auxiliary box sliding sleeve is connected to the front auxiliary box fork arranged on the front auxiliary box fork shaft. The front auxiliary box sliding sleeve can move axially along the first shaft driven by the front auxiliary box fork and is connected to the front auxiliary box input gear or gear seat.

[0009] The present invention also has the following technical features:

[0010] Specifically, a first axial hole is provided at the front end of the main box intermediate shaft, a first internal spline is provided on the inner circumference of the first axial hole, and the rear end of the front auxiliary box intermediate shaft is passed through the first axial hole; a first external spline is provided on the outer circumference of the rear end of the front auxiliary box intermediate shaft, and the first internal spline and the first external spline can cooperate with each other.

[0011] Furthermore, an air circuit control valve is provided in the transmission housing, a first air inlet A is provided on a first side wall of the air circuit control valve, a first air outlet B and a second air outlet C are provided on a second side wall of the air circuit control valve; the first air inlet A is connected to a high-pressure air source by means of a normal air pipe; a front auxiliary box cylinder is provided in the clutch housing, a shift piston is provided in the front auxiliary box cylinder, a front cavity and a rear cavity are respectively provided on both sides of the shift piston in the front auxiliary box cylinder, the first air outlet B is connected to the front cavity via a high-speed air circuit, and the second air outlet C is connected to the rear cavity via a low-speed air circuit.

[0012] Furthermore, a first exhaust port P1 and a second exhaust port P2 are formed on the first side wall of the gas circuit control valve, and ventilation plugs are disposed on the first exhaust port P1 and the second exhaust port P2.

[0013] Furthermore, the rear end of the shift piston is connected to the front auxiliary box shift fork shaft, and the front auxiliary box shift fork shaft can move axially driven by the shift piston.

[0014] Furthermore, the valve core contact of the gas circuit control valve can be connected to the gear shifter disposed in the transmission housing;

[0015] The gear shifting head includes a main body, a shifting head is fixedly arranged at the lower end of the main body, a gear shifting end capable of cooperating with the valve core contact is arranged at the lower part of the side wall of the main body close to the valve core contact, and a neutral gear avoidance arc surface is arranged at the upper part of the side wall of the main body close to the valve core contact; the outer end surface of the gear shifting end includes a low gear in place contact surface and a low gear triggering inclined surface, the lower side edge of the low gear in place contact surface is connected to the bottom surface of the gear shifting end, the upper side edge of the low gear in place contact surface is connected to the lower side edge of the low gear triggering inclined surface to form a limiting step, and the upper side edge of the low gear triggering inclined surface is connected to the neutral gear avoidance arc surface.

[0016] Furthermore, the second shaft is coaxially connected to the rear auxiliary box main shaft arranged in the rear auxiliary box; the second shaft is also sleeved with a sliding sleeve, and the sliding sleeve can move axially along the second shaft and is connected to the second shaft climbing gear sleeved on the second shaft to achieve gear shifting.

[0017] Furthermore, the one shaft is connected to the clutch housing through an input bearing, and the hollow shaft is connected to the transmission housing through a shaft bearing; the front auxiliary box intermediate shaft is connected to the transmission housing through a first intermediate shaft bearing; and the main box intermediate shaft is connected to the transmission housing through a second intermediate shaft bearing.

[0018] The present invention also protects a vehicle, which is equipped with the above-mentioned large-speed ratio transmission.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention achieves the purpose of ultra-low speed gear by adding a front auxiliary gearbox module with a first-stage gear reduction to the front end structure of the existing dual intermediate shaft transmission housing. The front auxiliary gearbox module does not work in normal gear. When the low gear is engaged and half of the displacement is reached, the front auxiliary gearbox air circuit is completely switched to low gear, thereby avoiding the difficulty of engaging the main gearbox climbing gear due to the increase in inertia after switching the front auxiliary gearbox first, reducing the wear of the sliding sleeve, and shortening the entire working switching time.

[0021] (2) Compared with the existing transmission with three rows of gear reduction and two sets of cylinders, the present invention has a simple structure, low assembly difficulty, a small number of parts and low cost.

[0022] (3) In the case of damage to the front auxiliary gearbox, the present invention only reduces the gear ratio of the climbing gear and cannot achieve the ultra-low gear. The use of other gears of the vehicle is not affected. During maintenance, only the front auxiliary gearbox module needs to be removed, which is convenient for maintenance and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 2 A top view of the present invention;

[0026] Figure 3 It is a schematic diagram of the front auxiliary box structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the gear shift knob of the present invention;

[0029] Figure 6 It is a schematic diagram of the state of the gear shifter and the gas circuit control valve contact in the neutral state;

[0030] Figure 7 It is a schematic diagram of the state of the gear shifter and the gas circuit control valve contact in the pre-gear state;

[0031] Figure 8 It is a schematic diagram of the state of the gear shifting head and the gas circuit control valve contact in the gear shifting 1 / 2 stroke state;

[0032] Fig. 9 This is a schematic diagram of the gear shifting stroke of Example 1.

[0033] Numbers in the figure:

[0034] 1-clutch housing, 2-transmission housing, 3-first shaft, 4-front auxiliary box intermediate shaft, 5-front auxiliary box fork shaft, 6-front auxiliary box input gear, 7-second shaft, 8-main box intermediate shaft, 9-hollow shaft, 10-gear seat, 11-first shaft gear, 12-intermediate shaft transmission gear, 13-front auxiliary box sliding sleeve, 14-front auxiliary box fork, 15-air circuit control valve, 16-normal ventilation pipeline, 17-front auxiliary box cylinder, 18-shift piston, 19-high-grade air circuit , 20-low gear air circuit, 21-gear shift head, 22-rear auxiliary box main shaft, 23-input bearing, 24-first shaft bearing, 25-first intermediate shaft bearing, 26-second intermediate shaft bearing, 27-sleeve, 28-second shaft climbing gear, 29-front auxiliary box intermediate shaft gear; 211-body, 212-shift head, 213-gear end; 2111-neutral gear avoidance arc surface; 2131-low climbing gear in place contact surface, 2132-low climbing gear triggering inclined surface.

[0035] The present solution is described in detail below with reference to the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0036] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0037] The terms "upper", "lower", "front", "rear", etc. used in the present invention to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. "Inside" and "outside" refer to the inside and outside of the contour of the corresponding component, and the above terms cannot be understood as limitations on the present invention.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0039] In the present invention, unless otherwise specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Unless otherwise specified, the components in the present invention can be purchased from the market.

[0041] Example 1

[0042] Following the above technical solution, Figures 1 to 7 As shown, this embodiment provides a high-speed ratio transmission, including a clutch housing 1, a transmission housing 2, a front auxiliary box, a main box and a rear auxiliary box; the front auxiliary box is located in a cavity formed by the clutch housing 1 and the front end of the transmission housing 2, the main box and the rear auxiliary box are sequentially connected from front to back and arranged in the transmission housing 2, a shaft 3, a front auxiliary box intermediate shaft 4 and a front auxiliary box shift fork shaft 5 are arranged in the front auxiliary box, and a front auxiliary box input gear 6 is hollowly sleeved at the rear end of the shaft 3, and the front auxiliary box input gear 6 is connected to the front auxiliary box intermediate shaft 4 through the front auxiliary box intermediate shaft gear;

[0043] The main box is provided with a second shaft 7 and a main box intermediate shaft 8. The front end of the second shaft 7 is coaxially connected to the rear end of the first shaft 3 via a hollow shaft 9. The end of the hollow shaft 9 close to the first shaft 3 is connected to a gear seat 10. The second shaft 7 is connected to the intermediate shaft transmission gear 12 via the first shaft gear 11. The intermediate shaft transmission gear 12 is sleeved on the main box intermediate shaft 8. The main box intermediate shaft 8 is coaxially connected to the front auxiliary box intermediate shaft 4.

[0044] A front auxiliary box sliding sleeve 13 is provided at the rear end of the first shaft 3, and the front auxiliary box sliding sleeve 13 is connected to a front auxiliary box fork 14 arranged on the front auxiliary box fork shaft 5. The front auxiliary box sliding sleeve 13 can move axially along the first shaft 3 driven by the front auxiliary box fork 14 and is connected to the front auxiliary box input gear 6 or the gear seat 10.

[0045] As a preferred solution of this embodiment, the first shaft 3, the front auxiliary box intermediate shaft 4 and the front auxiliary box shift fork shaft 5 are arranged in parallel.

[0046] As a preferred solution of this embodiment, a first axial hole is provided at the front end of the main box intermediate shaft 8, and the rear end of the front auxiliary box intermediate shaft 4 is inserted into the first axial hole; a first internal spline is provided on the inner circumference of the first axial hole, and a first external spline is provided on the outer circumference of the rear end of the front auxiliary box intermediate shaft 4, and the first internal spline and the first external spline can cooperate with each other.

[0047] As a preferred solution of this embodiment, Figure 2 and Figure 4 As shown, an air circuit control valve 15 is provided in the transmission housing 2, a first air inlet A is provided on a first side wall of the air circuit control valve 15, a first air outlet B and a second air outlet C are provided on a second side wall of the air circuit control valve 15; the first air inlet A is connected to a high-pressure air source by means of a constant air pipe 16; a front auxiliary box cylinder 17 is provided in the front auxiliary box, a piston accommodating chamber is provided in the front auxiliary box cylinder 17, a shift piston 18 is movably provided in the piston accommodating chamber, the shift piston 18 divides the piston accommodating chamber into a front cavity and a rear cavity, the first air outlet B is connected to the front cavity via a high-grade air circuit 19, and the second air outlet C is connected to the rear cavity via a low-grade air circuit 20.

[0048] As a preferred solution of this embodiment, a first exhaust port P1 and a second exhaust port P2 are further provided on the first side wall of the gas circuit control valve 15 , and ventilation plugs are provided on the first exhaust port P1 and the second exhaust port P2 .

[0049] As a preferred solution of this embodiment, the rear end of the shift piston 18 is connected to the front auxiliary box shift fork shaft 5 , and the front auxiliary box shift fork shaft 5 can move axially driven by the shift piston 18 .

[0050] As a preferred solution of this embodiment, the valve core contact 151 of the air circuit control valve 15 can be connected to the shifting head 21 disposed in the transmission housing 2;

[0051] like Figure 5 As shown, the gear shifting head 21 includes a main body 211, a shifting head 212 is fixedly arranged at the lower end of the main body 211, a gear shifting end 213 capable of cooperating with the valve core contact 151 is arranged at the lower part of the side wall of the main body 211 close to the valve core contact 151; a neutral gear avoidance arc surface 2111 is arranged at the upper part of the side wall of the main body 211 close to the valve core contact 151; the outer end surface of the gear shifting end 213 includes a low gear in place contact surface 2131 and a low gear triggering inclined surface 2132, the lower side edge of the low gear in place contact surface 2131 is connected to the bottom surface of the gear shifting end 213, the upper side edge of the low gear in place contact surface 2131 is connected to the lower side edge of the low gear triggering inclined surface 2132 to form a limiting step, and the upper side edge of the low gear triggering inclined surface 2132 is connected to the neutral gear avoidance arc surface 2111.

[0052] As a preferred solution of this embodiment, the second shaft 7 is coaxially connected to the rear auxiliary box main shaft 22 arranged in the rear auxiliary box; the second shaft 7 is also sleeved with a sliding sleeve 27, which can move axially along the second shaft 7 and be connected to the second shaft climbing gear 28 sleeved on the second shaft 7 to achieve gear shifting.

[0053] As a preferred solution of this embodiment, a shaft 3 is connected to the clutch housing 1 through an input bearing 23, and a hollow shaft 9 is connected to the transmission housing 2 through a shaft bearing 24; the front auxiliary box intermediate shaft 4 is connected to the transmission housing 2 through a first intermediate shaft bearing 25; and the main box intermediate shaft 8 is connected to the transmission housing 2 through a second intermediate shaft bearing 26.

[0054] The process of shifting down and climbing gear in this embodiment is as follows: the driver manipulates the hand ball to the reverse climbing gear position, such as Figures 6 to 9 As shown, the gear shifting head 21 first rotates clockwise by an angle (3.48° in this embodiment) to make the sliding sleeve 27 mounted on the second shaft 7 move an idle stroke distance (the purpose of reserving the idle stroke is to ensure that the gear can be completely disengaged to avoid the phenomenon of being unable to shift gears or the sliding sleeve being worn) to shift into gear, wherein the gear shifting stroke L = the gear shifting head rotation radius R*sinQ (Q is the gear shifting head rotation radius), which is 3.98mm in this embodiment. At this time, the low-speed air path 20 is slightly opened (that is, the normal air pipeline 16 is slightly connected to the low-speed air path 20). The high-speed air circuit 19 is completely closed; the low-speed air circuit 20 and the right side of the shift piston 18 are in an inflated state. When the gear is halfway engaged, the valve core contact 151 of the air hole control valve 15 is compressed to a certain position by the low gear triggering slope 2132 of the gear shifting head 21, and the low-speed air circuit 20 is fully opened (that is, the normal air pipeline 16 and the low-speed air circuit 20 are fully connected), pushing the shift piston 18 to move axially and drive the front auxiliary box shift fork 5 and the front auxiliary box sliding sleeve 13 to engage in gear, so that the internal spline of the front auxiliary box sliding sleeve 13 is engaged with the external spline of the front auxiliary box input gear 6, completing the gear engagement operation, and the reduction module of the front auxiliary box is connected.

[0055] The low climbing gear power transmission process of this embodiment is: 3→13→6→29→4→8→28→27→7→22. Specifically, the engine power is input through the first shaft 3, transmitted to the front auxiliary box sliding sleeve 13 through the spline, then transmitted to the front auxiliary box input gear 6 through the spline, then transmitted to the front auxiliary box intermediate shaft gear 29 through gear meshing, then transmitted to the front auxiliary box intermediate shaft 4 through interlocking and welding connection, then transmitted to the main box intermediate shaft 8 through the spline, then transmitted to the second shaft climbing gear 28 through gear meshing, then transmitted to the sliding sleeve 27 through the spline connection, then transmitted to the second shaft 7 through the spline connection, and finally transmitted to the rear auxiliary box main shaft 22 through the rear auxiliary box gear pair for power output.

[0056] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

Claims

1. A high-speed ratio transmission, comprising a clutch housing (1), a transmission housing (2), a front auxiliary housing, a main housing and a rear auxiliary housing; the front auxiliary housing is located in a cavity formed by the clutch housing (1) and the front end of the transmission housing (2); the main housing and the rear auxiliary housing are sequentially connected from front to back and arranged in the transmission housing (2), characterized in that: A shaft (3), a front auxiliary box intermediate shaft (4) and a front auxiliary box shift fork shaft (5) are arranged in the front auxiliary box, and a front auxiliary box input gear (6) is sleeved at the rear end of the shaft (3), and the front auxiliary box input gear (6) is connected to the front auxiliary box intermediate shaft (4) via a front auxiliary box intermediate shaft gear (29); The main box is provided with two shafts (7) and a main box intermediate shaft (8); the front end of the two shafts (7) is coaxially connected to the rear end of the one shaft (3) via a hollow shaft (9); the end of the hollow shaft (9) close to the one shaft (3) is connected to a gear seat (10); the two shafts (7) are connected to an intermediate shaft transmission gear (12) via a shaft gear (11); the intermediate shaft transmission gear (12) is sleeved on the main box intermediate shaft (8); the main box intermediate shaft (8) is coaxially connected to the front auxiliary box intermediate shaft (4); A front auxiliary box sliding sleeve (13) is sleeved on the rear end of the shaft (3); the front auxiliary box sliding sleeve (13) is connected to a front auxiliary box shift fork (14) arranged on the front auxiliary box shift fork shaft (5); the front auxiliary box sliding sleeve (13) can move axially along the shaft (3) driven by the front auxiliary box shift fork (14) and is connected to the front auxiliary box input gear (6) or the gear seat (10).

2. The high speed ratio transmission according to claim 1, characterized in that: The front end of the main box intermediate shaft (8) is provided with a first shaft hole, and the rear end of the front auxiliary box intermediate shaft (4) is inserted into the first shaft hole; the inner circumference of the first shaft hole is provided with a first internal spline, and the outer circumference of the rear end of the front auxiliary box intermediate shaft (4) is provided with a first external spline, and the first internal spline and the first external spline can cooperate with each other.

3. The high speed ratio transmission according to claim 1, characterized in that: The transmission housing (2) is provided with an air circuit control valve (15), a first air inlet A is provided on a first side wall of the air circuit control valve (15), and a first air outlet B and a second air outlet C are provided on a second side wall of the air circuit control valve (15); the first air inlet A is connected to a high-pressure air source by means of a normal air pipe (16); the clutch housing (1) is provided with a front auxiliary box cylinder (17), a piston accommodating chamber is provided in the front auxiliary box cylinder (17), a shift piston (18) is movably provided in the piston accommodating chamber, and the shift piston (18) divides the piston accommodating chamber into a front chamber and a rear chamber, the first air outlet B is connected to the front chamber via a high-speed air circuit (19), and the second air outlet C is connected to the rear chamber via a low-speed air circuit (20).

4. The high speed ratio transmission according to claim 3, characterized in that: A first exhaust port P1 and a second exhaust port P2 are also provided on the first side wall of the gas path control valve (15), and ventilation plugs are provided on the first exhaust port P1 and the second exhaust port P2.

5. The high speed ratio transmission according to claim 3, characterized in that: The rear end of the shift piston (18) is connected to the front auxiliary box shift fork shaft (5), and the front auxiliary box shift fork shaft (5) can move axially under the drive of the shift piston (18).

6. The high speed ratio transmission according to claim 3, characterized in that: The valve core contact (151) of the air circuit control valve (15) can be connected to a gear shifting head (21) arranged in the transmission housing (2); The gear shifting head (21) comprises a body (211), a shifting head (212) is fixedly arranged at the lower end of the body (211), a gear shifting end (213) capable of cooperating with the valve core contact (151) is arranged at the lower part of the side wall of the body (211) close to the valve core contact (151); a neutral gear avoidance arc surface (2111) is arranged at the upper part of the side wall of the body (211) close to the valve core contact (151); the gear shifting end (213) The outer end surface comprises a low gear in place contact surface (2131) and a low gear triggering inclined surface (2132); the lower side edge of the low gear in place contact surface (2131) is connected to the bottom surface of the gear engaging end (213); the upper side edge of the low gear in place contact surface (2131) is connected to the lower side edge of the low gear triggering inclined surface (2132) to form a limiting step; and the upper side edge of the low gear triggering inclined surface (2132) is connected to the neutral gear avoidance arc surface (2111).

7. The high speed ratio transmission according to claim 1, characterized in that: The second shaft (7) is coaxially connected to a rear auxiliary box main shaft (22) arranged in the rear auxiliary box, and a sliding sleeve (27) is also sleeved on the second shaft (7). The sliding sleeve (27) can move axially along the second shaft (7) and connect with a second shaft climbing gear (28) sleeved on the second shaft (7) to achieve gear shifting.

8. The high speed ratio transmission according to claim 1, characterized in that: The first shaft (3) is connected to the clutch housing (1) via an input bearing (23); the hollow shaft (9) is connected to the transmission housing (2) via a first shaft bearing (24); the front auxiliary box intermediate shaft (4) is connected to the transmission housing (2) via a first intermediate shaft bearing (25); and the main box intermediate shaft (8) is connected to the transmission housing (2) via a second intermediate shaft bearing (26).

9. A car, characterized in that: The vehicle is provided with a high-speed ratio transmission according to any one of claims 1 to 8.

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