Transmission case for an engineering vehicle

Abstract

The application relates to a transmission box for engineering vehicles, which comprises a transmission box body and a multifunctional brake device, the transmission box body contains a casing, an input shaft and an output shaft, the input shaft and the output shaft are transmissionally connected through a gear transmission mechanism; the multifunctional brake device comprises a fixed sleeve, the inner end of the fixed sleeve is fixedly connected to the casing, a limiting sleeve is movably arranged on the outer side of the fixed sleeve; a hydraulic brake is fixedly arranged at the mounting port of the fixed sleeve; a spiral spring is fixedly arranged on the inner side of the limiting sleeve, the inner end of the spiral spring is fixedly connected to the limiting sleeve, and the rotation direction of the spiral spring is consistent with the transmission direction of the output shaft; and a driving mechanism is used for driving the hydraulic brake of the multifunctional brake device to act. The application can effectively and accurately detect the shaking of the output shaft of the transmission box for engineering vehicles, and effectively makes the output shaft under obvious shaking conditions stop suddenly according to the detection condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission boxes, in particular to an engineering vehicle transmission box. BACKGROUND

[0002] The gear transmission box is a commonly used component in automobiles, which plays a very important role in the overall transmission of the automobile and the transmission efficiency of the engine, and plays a crucial role in the driving process of the automobile. Among them, the actual working condition of the engineering vehicle is relatively complex, and the load is generally large, so the failure rate of the existing engineering vehicle transmission box is relatively high during use.

[0003] The output shaft of the existing engineering vehicle transmission box often appears obvious shaking during transmission due to large load during use, and when the shaking amplitude of the output shaft of the engineering vehicle transmission box exceeds the design value, it is easy to be damaged, and the transmission gear set is also damaged. To solve this problem, the existing method is generally to install a vibration sensor on the housing of the engineering vehicle transmission box, and when the output shaft of the engineering vehicle transmission box shakes obviously under high load conditions, the corresponding transmission gear set will also vibrate obviously, and when the vibration amount collected by the vibration sensor exceeds the set value, it can be judged that the output shaft of the engineering vehicle transmission box may have obvious shaking, and the corresponding information is sent to the vehicle control system to issue a warning message for troubleshooting. In this way, although the running condition of the output shaft of the engineering vehicle transmission box can be monitored to some extent, human assistance is still needed for troubleshooting, and when the output shaft of the engineering vehicle transmission box is found to have obvious shaking, corresponding remedial measures cannot be taken in time, and only through shutdown inspection, the engineering vehicle transmission box during operation still has the probability of damage, which is very troublesome.

[0004] Therefore, the research purpose of the present application is to design an engineering vehicle transmission box which can accurately detect the shaking of the output shaft of the engineering vehicle transmission box and effectively stop the output shaft under obvious shaking conditions, thereby effectively reducing the damage probability of the equipment. SUMMARY

[0005] In view of the technical problems existing in the prior art, the present application provides an engineering vehicle transmission box which can effectively solve the technical problems existing in the prior art.

[0006] The technical scheme of the present application is:

[0007] The utility model provides an engineering vehicle transmission case, including transmission case body, the transmission case body contains the shell and the input shaft and output shaft are rotatably installed on the shell, and the input shaft and output shaft are connected through the gear transmission mechanism, the utility model also provides a multifunctional brake device, the utility model discloses a multifunctional brake device, comprising:

[0008] The fixed sleeve is sleeved on the periphery of the output shaft, the inner end of the fixed sleeve is fixedly connected to the shell, and a corresponding mounting hole is arranged on the inner side of the fixed sleeve, and the outer side of the fixed sleeve is movably connected with a corresponding limiting sleeve through screw connection.

[0009] The hydraulic brake is fixedly connected to the mounting hole of the fixed sleeve, and a brake pad matched with the hydraulic brake is fixedly connected to the output shaft.

[0010] The spiral spring is fixedly sleeved on the inner side of the limiting sleeve, the inner end of the spiral spring is fixedly connected to the limiting sleeve, and the rotation direction of the spiral spring is consistent with the transmission direction of the output shaft, the spiral spring is sleeved on the outer side of the output shaft and is arranged in a gap with the outer side of the output shaft.

[0011] The driving mechanism comprises a hydraulic cavity arranged on the outer end of the fixed sleeve, the outer end of the hydraulic cavity is sealingly fixedly connected with a corresponding cover plate, the inner side of the cover plate is movably provided with a corresponding piston, the outer side of the piston is fixedly connected with a plurality of piston shafts extending outwardly to the outer side of the cover plate, the inner side of the fixed sleeve is provided with a three-way guide hole in communication with the hydraulic cavity, the oil inlet end of the hydraulic brake is connected to the bottom side of the three-way guide hole, and the top of the three-way guide hole is connected to an external hydraulic control system.

[0012] The fixed sleeve is fixedly provided with a corresponding stroke detection device for detecting the stroke of the limiting sleeve, when the limiting sleeve moves inwardly to the position of the stroke detection device, the stroke detection device sends an alarm signal outwardly.

[0013] The stroke detection device comprises a control module fixedly installed on the fixed sleeve, and a signal emitting module and a trigger switch connected to the control module, the trigger switch is opposite to the limiting sleeve, when the limiting sleeve moves inwardly to touch the trigger switch, the control module controls the signal emitting module to send an alarm signal outwardly.

[0014] The signal emitting module is a Bluetooth module.

[0015] The outer ends of the piston shafts are respectively provided with corresponding abutting balls.

[0016] The inner walls of the fixed sleeve and the limiting sleeve are respectively fixedly provided with a corresponding damping and noise reduction material layer.

[0017] The shell comprises an input shaft mounting portion and an output shaft mounting portion, the input shaft and the output shaft are rotatably mounted on the input shaft mounting portion and the output shaft mounting portion through corresponding mounting bearings respectively, the input shaft mounting portion and the output shaft mounting portion are integrally connected through a plurality of corresponding locking screw pairs, and a gear mounting cavity is arranged between the input shaft mounting portion and the output shaft mounting portion.

[0018] The inner end of the fixing sleeve is integrally connected to the output shaft mounting portion, and a plurality of corresponding link reinforcing rib plates are uniformly arranged on the input shaft mounting portion and the output shaft mounting portion respectively.

[0019] The inner ends of the input shaft and the output shaft extend into the gear mounting cavity, the gear transmission mechanism comprises a main transmission gear mounted on the end of the input shaft, a corresponding transmission shaft is rotatably mounted in the gear mounting cavity, a first link gear meshing with the main transmission gear is mounted on the transmission shaft, and a second link gear is fixedly mounted on the side of the transmission shaft without the first link gear, and a driven transmission gear meshing with the second link gear is fixedly mounted on the end of the output shaft.

[0020] Corresponding annular sealing gaskets are fixedly mounted at the link portions of the input shaft mounting portion and the output shaft mounting portion.

[0021] Compared with the prior art, the application has the following advantages and positive effects:

[0022] 1) The application adds a multifunctional brake device, which comprises a fixing sleeve sleeved on the periphery of the output shaft, the inner end of the fixing sleeve is fixedly connected to the shell, and the inner side of the fixing sleeve is provided with a mounting port, the outer side of the fixing sleeve is movably mounted with a limiting sleeve through a threaded connection, a hydraulic brake is fixedly mounted at the mounting port of the fixing sleeve, and a brake pad is fixedly connected to the output shaft, and a spiral spring is fixedly sleeved on the inner side of the limiting sleeve, wherein the inner end of the spiral spring is fixedly connected to the limiting sleeve, and the outer side of the output shaft is arranged in a gap.

[0023] On this basis, the application correspondingly adds a driving mechanism for driving the multifunctional brake device, which comprises a hydraulic chamber arranged at the outer end of the fixing sleeve, the outer end of the hydraulic chamber is sealingly fixedly connected with a corresponding cover plate, the inner side of the cover plate is movably provided with a corresponding piston, the outer side of the piston is outwardly fixedly connected with a plurality of piston shafts extending through to the outer side of the cover plate, the inner side of the fixing sleeve is provided with a three-way guide hole in communication with the hydraulic chamber, the oil inlet end of the hydraulic brake is connected to the bottom side of the three-way guide hole, and the top of the three-way guide hole is connected to an external hydraulic control system.

[0024] When the output shaft needs to be braked during operation, the external hydraulic control system controls the hydraulic oil to enter the hydraulic brake through the three-way guide hole to brake the brake pad (output shaft); when the output shaft is in obvious vibration, the outer side of the output shaft is in contact with the spiral spring, and the high-speed rotating output shaft and the spiral spring form sufficient friction to drive the spiral spring to wind around the output shaft, so that the spiral spring is tightened on the output shaft to preliminarily slow down the output shaft; at the same time, the output shaft drives the spiral spring to rotate, and further drives the limiting sleeve to rotate into the fixed sleeve to push the piston shaft and the piston, and further drives the hydraulic brake to brake the brake pad (output shaft). In this way, the vibration of the output shaft of the transmission box of the engineering vehicle can be accurately detected, and the output shaft in obvious vibration can be effectively stopped, thereby effectively reducing the damage probability of the equipment.

[0025] 2) The fixed sleeve and the limiting sleeve of the present application can effectively assemble the multifunctional brake device and the driving mechanism, and form a corresponding damping area. During operation of the overall transmission assembly, the vibration generated by the power output end, i.e. the output shaft, is the largest, and most of the vibration generated by the operation of the output shaft will be transmitted to the fixed sleeve and the limiting sleeve during transmission to the machine shell, thereby effectively reducing the vibration transmitted to the machine shell, and reducing the mechanical damage of the vibration generated by the operation of the output shaft to the transmission box of the engineering vehicle.

[0026] 3) The fixed sleeve of the present application is fixedly installed with a corresponding travel detection device, which detects the travel of the limiting sleeve. When the limiting sleeve moves inward to the position of the travel detection device, the travel detection device sends an alarm signal outward. In this way, the alarm signal can be effectively sent out while the output shaft is stopped, thereby further accurately detecting the vibration of the output shaft of the transmission box of the engineering vehicle.

[0027] 4) The outer end of the piston shaft of the present application is respectively installed with a corresponding abutting ball, so as to ensure that the limiting sleeve and the piston shaft are in rolling contact during rotation, thereby reducing the negative effects caused by friction, and ensuring the smooth operation of the emergency stop of the output shaft.

[0028] 5) The inner side wall of the fixed sleeve and the limiting sleeve of the present application is respectively fixedly connected with a corresponding damping and noise reduction material layer, so as to quickly reduce the vibration transmitted to the fixed sleeve and the limiting sleeve, thereby further effectively reducing the vibration transmitted to the machine shell. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The figure is a structural schematic view of the present application.

[0030] Figure 2A sectional view of the present application.

[0031] Figure 3 A sectional view of the present application.

[0032] Figure 4 A sectional view of the present application. Figure 3 A partial enlarged view of part A in the figure.

[0033] Figure 5 An assembly schematic view of the driving mechanism of the present application.

[0034] Figure 6 A structural schematic view of the stroke detection device of the present application.

[0035] In the figure: transmission case body 1, casing 101, input shaft mounting portion 1011, output shaft mounting portion 1012, input shaft 102, output shaft 103, gear transmission mechanism 2, main transmission gear 201, transmission shaft 202, first engaging gear 203, second engaging gear 204, driven transmission gear 205, multifunctional brake device 3, fixed sleeve 301, limiting sleeve 302, hydraulic brake 303, brake pad 304, helical spring 305, driving mechanism 306, hydraulic cavity 3061, cover plate 3062, piston 3063, piston shaft 3064, three-way guide hole 3065, mounting port 4, stroke detection device 5, control module 501, signal emitting module 502, trigger switch 503, abutting ball 6, vibration and noise reduction material layer 7, locking bolt 8, gear mounting cavity 9, engaging reinforcing rib plate 10, annular sealing gasket 11. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the present application is further described in detail below in combination with the figures and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0037] Reference Figures 1-6 A transmission case for engineering vehicles, comprising a transmission case body 1, the transmission case body 1 comprising a casing 101, and an input shaft 102 and an output shaft 103 rotatably mounted on the casing 101, the input shaft 102 and the output shaft 103 being transmissionally connected through a corresponding gear transmission mechanism 2, the transmission case for engineering vehicles further comprising a multifunctional brake device 3, the multifunctional brake device 3 comprising:

[0038] A fixed sleeve 301 is sleeved on the periphery of the output shaft 103, the inner end of the fixed sleeve 301 is fixedly connected to the casing 101, and a corresponding mounting port 4 is provided on the inner side of the fixed sleeve 301, and a limiting sleeve 302 is movably installed on the outer side of the fixed sleeve 301 through a threaded connection;

[0039] A hydraulic brake 303 is fixedly connected to the mounting opening 4 of the fixed sleeve 301, and a brake pad 304 adapted to the hydraulic brake 303 is fixedly connected to the output shaft 103;

[0040] A coil spring 305 is fixedly sleeved on the inner side of the limiting sleeve 302, the inner end of the coil spring 305 is fixedly connected to the limiting sleeve 302, and the rotation direction of the coil spring 305 is consistent with the transmission direction of the output shaft 103, the coil spring 305 is sleeved on the outer side of the output shaft 103 and is arranged in a gap with the outer side of the output shaft 103;

[0041] A driving mechanism 306 comprises a hydraulic cavity 3061 arranged on the outer end of the fixed sleeve 301, the outer end of the hydraulic cavity 3061 is sealingly fixedly connected with a corresponding cover plate 3062, the inner side of the cover plate 3062 is movably arranged with a corresponding piston 3063, the outer side of the piston 3063 is fixedly connected with a plurality of piston shafts 3064 extending through to the outer side of the cover plate 3062; the inner side of the fixed sleeve 301 is arranged with a three-way guide hole 3065 in communication with the hydraulic cavity 3061, the oil inlet end of the hydraulic brake 303 is connected to the bottom side of the three-way guide hole 3065, and the top of the three-way guide hole 3065 is connected to an external hydraulic control system.

[0042] The multifunctional brake device 3 is additionally provided, which comprises a fixed sleeve 301 sleeved on the periphery of the output shaft 103, the inner end of the fixed sleeve 301 is fixedly connected to the shell 101, and the inner side of the fixed sleeve 301 is arranged with a mounting opening 4, the outer side of the fixed sleeve 301 is movably arranged with a limiting sleeve 302 through a threaded connection, then a hydraulic brake 303 is fixedly arranged at the mounting opening 4 of the fixed sleeve 301, and a brake pad 304 is fixedly connected to the output shaft 103, and then a coil spring 305 is fixedly sleeved on the inner side of the limiting sleeve 302, wherein the inner end of the coil spring 305 is fixedly connected to the limiting sleeve 302, and the coil spring 305 is arranged in a gap with the outer side of the output shaft 103.

[0043] On this basis, the driving mechanism 306 for driving the multifunctional brake device 3 is additionally provided, which comprises a hydraulic cavity 3061 arranged on the outer end of the fixed sleeve 301, the outer end of the hydraulic cavity 3061 is sealingly fixedly connected with a corresponding cover plate 3062, the inner side of the cover plate 3062 is movably arranged with a corresponding piston 3063, the outer side of the piston 3063 is fixedly connected with a plurality of piston shafts 3064 extending through to the outer side of the cover plate 3062; the inner side of the fixed sleeve 301 is arranged with a three-way guide hole 3065 in communication with the hydraulic cavity 3061, the oil inlet end of the hydraulic brake 303 is connected to the bottom side of the three-way guide hole 3065, and the top of the three-way guide hole 3065 is connected to an external hydraulic control system.

[0044] When the output shaft 103 needs to be braked during operation, the external hydraulic control system controls the hydraulic oil to enter the hydraulic brake 303 through the three-way guide hole 3065 to brake the brake pad 304 (output shaft) to reduce speed; when the amplitude of the output shaft 103 exceeds the set value, the outer surface of the output shaft 103 contacts the spiral spring 305, and the high-speed rotating output shaft 103 forms sufficient friction with the spiral spring 305 to drive the spiral spring 305 to wind around the output shaft 103, so that the spiral spring 305 is tightened on the output shaft 103 to preliminarily reduce the speed of the output shaft 103; at the same time, the output shaft 103 drives the spiral spring 305 to rotate, and further drives the limiting sleeve 302 to rotate into the fixed sleeve 301 to push the piston shaft 3064 and the piston 3063, and further drives the hydraulic brake 303 to brake the brake pad 304 (output shaft). In this way, the vibration of the output shaft 103 of the transmission box of the engineering vehicle can be accurately detected, and the output shaft 103 in the obvious vibration condition can be effectively stopped, thereby effectively reducing the damage probability of the equipment.

[0045] The fixed sleeve 301 and the limiting sleeve 302 of the present application can effectively assemble the multifunctional brake device 3 and the driving mechanism 306, and form a corresponding damping area. During operation of the overall transmission assembly, the vibration generated by the power output end, i.e. the output shaft 103, is the largest, and most of the vibration generated by the operation of the output shaft 103 will be transmitted to the fixed sleeve 301 and the limiting sleeve 302 during transmission to the machine shell 101, thereby effectively reducing the vibration transmitted to the machine shell 101, to reduce the mechanical damage of the vibration generated by the operation of the output shaft 103 to the transmission box of the engineering vehicle.

[0046] The fixed sleeve 301 is fixedly installed with a corresponding travel detection device 5 for detecting the travel of the limiting sleeve 302, and when the limiting sleeve 302 moves inward to the position of the travel detection device 5, the travel detection device 5 sends an alarm signal outward.

[0047] The travel detection device 5 comprises a control module 501 fixedly installed on the fixed sleeve 301, and a signal emitting module 502 and a trigger switch 503 connected to the control module 501, and the trigger switch 503 faces the limiting sleeve 302, and when the limiting sleeve 302 moves inward to touch the trigger switch 503, the control module 501 controls the signal emitting module 502 to send an alarm signal outward. The signal emitting module 502 is a Bluetooth module.

[0048] The fixed sleeve 301 is fixedly installed with a corresponding stroke detection device 5, which detects the stroke of the limiting sleeve 302. When the limiting sleeve 302 moves inward to the position of the stroke detection device 5, the stroke detection device 5 sends an alarm signal outward to effectively issue an alarm signal while completing the emergency stop of the output shaft 103, thereby effectively further detecting the jitter of the output shaft 103 of the engineering vehicle transmission case.

[0049] The outer end of the piston shaft 3064 is respectively rollingly installed with a corresponding abutting ball 6 to ensure that the limiting sleeve 302 and the piston shaft 3064 form rolling contact during rotation, thereby reducing the negative effects caused by friction and ensuring smooth operation of the emergency stop of the output shaft 103.

[0050] The inner side walls of the fixed sleeve 301 and the limiting sleeve 302 are respectively fixedly connected with a corresponding vibration and noise reduction material layer 7 to quickly reduce the amount of vibration transmitted to the fixed sleeve 301 and the limiting sleeve 302, thereby further effectively reducing the amount of vibration transmitted to the machine shell 101.

[0051] The machine shell 101 includes an input shaft mounting portion 1011 and an output shaft mounting portion 1012. The input shaft 102 and the output shaft 103 are respectively rotatably mounted on the input shaft mounting portion 1011 and the output shaft mounting portion 1012 through corresponding mounting bearings. The input shaft mounting portion 1011 and the output shaft mounting portion 1012 are integrally connected through a plurality of corresponding locking bolts 8, and a gear mounting cavity 9 is provided between the input shaft mounting portion 1011 and the output shaft mounting portion 1012.

[0052] The inner end of the fixed sleeve 301 is integrally connected to the output shaft mounting portion 1012. The input shaft mounting portion 1011 and the output shaft mounting portion 1012 are respectively provided with a plurality of corresponding link reinforcing rib plates 10.

[0053] The inner ends of the input shaft 102 and the output shaft 103 respectively extend into the gear mounting cavity 9. The gear transmission mechanism 2 includes a main transmission gear 201 mounted on the end of the input shaft 102. A transmission shaft 202 is rotatably mounted in the gear mounting cavity 9. The transmission shaft 202 is provided with a first link gear 203 engaged with the main transmission gear 201. A second link gear 204 is fixedly installed on the side of the transmission shaft 202 where the first link gear 203 is not installed. The end of the output shaft 103 is fixedly installed with a driven transmission gear 205 engaged with the second link gear 204.

[0054] The link between the input shaft mounting portion 1011 and the output shaft mounting portion 1012 is fixedly installed with a corresponding annular sealing gasket 11.

[0055] The above merely describes the preferred embodiments of the present application, but is not intended to limit the present application in other forms. Any person skilled in the art can make changes or modifications to the above disclosed technical contents into equivalent embodiments with equivalent changes, and apply to other fields. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solution content of the present application still belongs to the protection scope of the present application technical solution.

Claims

1. A transmission case for an engineering vehicle, comprising a transmission case body (1) containing a housing (101), and an input shaft (102) and an output shaft (103) rotatably mounted on the housing (101), the input shaft (102) and the output shaft (103) being drivingly connected by a corresponding gear transmission mechanism (2), characterized in that, The transmission box for the engineering vehicle further comprises a multifunctional brake device (3), which comprises: a fixed sleeve (301) sleeved on the periphery of the output shaft (103), an inner end of the fixed sleeve (301) being fixedly connected to the shell (101), and an inner side of the fixed sleeve (301) being provided with a corresponding mounting hole (4), an outer side of the fixed sleeve (301) being movably provided with a corresponding limiting sleeve (302) through a threaded connection; a hydraulic brake (303) fixedly connected to the mounting hole (4) of the fixed sleeve (301), and a brake pad (304) fixedly connected to the output shaft (103) and matched with the hydraulic brake (303); a coil spring (305) fixedly sleeved on the inner side of the limiting sleeve (302), an inner end of the coil spring (305) being fixedly connected to the limiting sleeve (302), and a rotation direction of the coil spring (305) being consistent with a transmission direction of the output shaft (103), the coil spring (305) being sleeved on the outer side of the output shaft (103) and being provided with a gap with the outer side of the output shaft (103); a driving mechanism (306) comprising a hydraulic cavity (3061) provided on an outer end of the fixed sleeve (301), an outer end of the hydraulic cavity (3061) being sealingly fixedly provided with a corresponding cover plate (3062), an inner side of the cover plate (3062) being movably provided with a corresponding piston (3063), an outer side of the piston (3063) being outwardly fixedly provided with a plurality of piston shafts (3064) extending through to the outer side of the cover plate (3062); an inner side of the fixed sleeve (301) being provided with a three-way guide hole (3065) in communication with the hydraulic cavity (3061), an oil inlet end of the hydraulic brake (303) being connected to a bottom side of the three-way guide hole (3065), and a top of the three-way guide hole (3065) being connected to an external hydraulic control system.

2. The transmission housing for an engineering vehicle as set forth in claim 1, characterized by A stroke detection device (5) is fixedly mounted on the fixed sleeve (301) and used for detecting the stroke of the limiting sleeve (302), when the limiting sleeve (302) moves inwardly to a position of the stroke detection device (5), the stroke detection device (5) sends an alarm signal outwardly.

3. The transmission housing for an engineering vehicle as set forth in claim 2, characterized by The stroke detection device (5) comprises a control module (501) fixedly mounted on the fixed sleeve (301), and a signal emitting module (502) and a trigger switch (503) connected to the control module (501), the trigger switch (503) being opposite to the limiting sleeve (302), when the limiting sleeve (302) moves inwardly to touch the trigger switch (503), the control module (501) controls the signal emitting module (502) to send an alarm signal outwardly.

4. The transmission housing for an engineering vehicle as set forth in claim 3, characterized by The signal emitting module (502) is a Bluetooth module.

5. The transmission housing of claim 1, wherein: Outer ends of the piston shafts (3064) are respectively rollingly provided with corresponding abutting balls (6).

6. The transmission housing for a work vehicle of claim 1, wherein, Inner side walls of the fixed sleeve (301) and the limiting sleeve (302) are respectively fixedly provided with corresponding layers of damping and noise reduction materials (7).

7. The transmission housing of claim 1, wherein: The machine shell (101) contains an input shaft mounting part (1011) and an output shaft mounting part (1012), the input shaft (102) and the output shaft (103) are respectively rotatably mounted on the input shaft mounting part (1011) and the output shaft mounting part (1012) through corresponding mounting bearings, the input shaft mounting part (1011) and the output shaft mounting part (1012) are integrally connected through a plurality of corresponding locking bolts (8), and a gear mounting cavity (9) is arranged between the input shaft mounting part (1011) and the output shaft mounting part (1012).

8. The transmission housing for an engineering vehicle as set forth in claim 7, characterized by The inner end of the fixing sleeve (301) is integrally connected to the output shaft mounting part (1012), and a plurality of corresponding connecting reinforcing rib plates (10) are uniformly arranged on the input shaft mounting part (1011) and the output shaft mounting part (1012).

9. The transmission housing for an engineering vehicle as set forth in claim 7, wherein The inner ends of the input shaft (102) and the output shaft (103) respectively extend into the gear mounting cavity (9), the gear transmission mechanism (2) contains a main transmission gear (201) mounted on the end of the input shaft (102), a corresponding transmission shaft (202) is rotatably mounted in the gear mounting cavity (9), the transmission shaft (202) is provided with a first connecting gear (203) engaged with the main transmission gear (201), and a second connecting gear (204) is fixedly mounted on the side of the transmission shaft (202) where the first connecting gear (203) is not mounted, and a driven transmission gear (205) engaged with the second connecting gear (204) is fixedly mounted on the end of the output shaft (103).

10. The transmission housing for a work vehicle as set forth in claim 7, wherein The connecting part of the input shaft mounting part (1011) and the output shaft mounting part (1012) is fixedly provided with a corresponding annular sealing gasket (11).

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