Rear power take-off assembly and engineering vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a rear power take-off assembly and an engineering vehicle. The rear power take-off assembly comprises a gear shaft, a power output assembly, a connecting assembly, a pushing assembly and a reset assembly. At the first position, the connecting assembly is used for connecting the gear shaft with the power output assembly; and in the second position, the connecting assembly is used for separating the gear shaft from the power output assembly. The gear shaft is sleeved with the pushing assembly; a first mounting gap is defined by the pushing assembly, the connecting assembly and the outer side face of the gear shaft. The pushing assembly is in sliding fit with the gear shaft in the axial direction, and the first end of the pushing assembly is connected with the connecting assembly and used for driving the connecting assembly to move to the second position. The reset assembly is located in the first installation gap, connected with the gear shaft and the pushing assembly and used for driving the gear shaft to move to the first position through the pushing assembly. The rear power take-off assembly solves the problem that a rear power take-off assembly in the prior art cannot give consideration to operation stability and size.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a rear power take-off assembly and an engineering vehicle. Background Art

[0002] Existing engineering vehicles, such as cement mixers, sanitation vehicles and other vehicles with upper-mounted devices, have power from the main engine and the auxiliary engine. For the power from the main engine, it is necessary to install a power take-off assembly at the engine, gearbox, transfer case and other locations. The power take-off assembly of existing vehicles includes a gear shaft, a clutch mechanism and an output flange; the gear shaft is meshed with the engine, the output flange is connected to the upper-mounted device, and the clutch mechanism is used to control the gear shaft and the output flange to switch between the connected state and the disconnected state. In the connected state, the gear shaft transmits power to the output flange, and the output flange drives the upper-mounted device to work. In the disconnected state, the gear shaft cannot transmit power to the output flange, and the upper-mounted device stops working. Although the existing power take-off assembly can stop the upper-mounted device from working when the engine is working, thereby reducing the engine fuel consumption, the existing power take-off assembly has an unreasonable structural layout and cannot take into account the problems of operational stability and volume. Therefore, how to reduce the volume of the rear power take-off assembly on the basis of ensuring motion stability is an urgent problem to be solved in the industry. Utility Model Content

[0003] The utility model provides a rear power take-off assembly and an engineering vehicle, which are used to solve the problem that the rear power take-off assembly in the prior art cannot take into account both running stability and volume.

[0004] The utility model provides a rear power take-off assembly, comprising:

[0005] A gear shaft, used for meshing connection with an engine;

[0006] A power output assembly, used for connection with upper equipment;

[0007] A connecting assembly connected to the gear shaft and the power output assembly, wherein when in a first position, the connecting assembly is used to connect the gear shaft with the power output assembly; when in a second position, the connecting assembly is used to separate the gear shaft from the power output assembly;

[0008] A pushing component is sleeved on the gear shaft, and the pushing component, the connecting component and the outer side surface of the gear shaft enclose a first installation gap; the pushing component and the gear shaft are axially slidably matched, and the first end of the pushing component is connected to the connecting component to drive the connecting component to move to the second position;

[0009] A reset component is located in the first installation gap, and the reset component is connected to the gear shaft and the pushing component, and is used to drive the gear shaft to move to the first position through the pushing component.

[0010] According to the rear power take-off assembly provided by the utility model, the pushing component includes:

[0011] A first pusher, sleeved on the gear shaft;

[0012] A second pushing member is sleeved on the gear shaft, a first end of the second pushing member is connected to the connecting assembly, and the second pushing member, the connecting assembly and the outer side surface of the gear shaft form the first installation gap;

[0013] The connecting bearing is sleeved on the outer side surface of the second pushing member and rotatably cooperates with the second pushing member. A side surface of the connecting bearing away from the second pushing member is connected to the first pushing member.

[0014] According to the rear power take-off assembly provided by the utility model, a first thrust plate is arranged between the first pushing member and the gear shaft; a second thrust plate is arranged between the second pushing member and the gear shaft; the hardness of the first thrust plate and the hardness of the second thrust plate are both greater than the hardness of the gear shaft.

[0015] According to the rear power take-off assembly provided by the utility model, the reset component includes an elastic member; two ends of the elastic member are respectively connected to the pushing component and the gear shaft, and are used for telescopic deformation along the axial direction of the gear shaft.

[0016] The rear power take-off assembly provided by the utility model also includes:

[0017] The bearing assembly is sleeved on one end of the center axis of the gear shaft close to the gear, and the bearing assembly is rotationally matched with the center axis.

[0018] According to the rear power take-off assembly provided by the utility model, the bearing assembly includes:

[0019] A plurality of bearing members are arranged at intervals along the axial direction of the gear shaft and are all rotatably matched with the central shaft.

[0020] According to the rear power take-off assembly provided by the utility model, the stress intensity of the bearing component close to the gear is greater than the stress intensity of the bearing component far from the gear.

[0021] According to the rear power take-off assembly provided by the utility model, a sliding hole is formed inside the gear shaft; the power output assembly includes:

[0022] The output shaft is sleeved on the outer side surface of the gear shaft and forms a third installation gap with the outer side surface of the gear shaft; the connecting assembly is located in the third installation gap;

[0023] A slider, one end of which is connected to the output shaft, and the other end of which is slidably matched with the slide hole along the axial direction of the gear shaft.

[0024] According to the rear power take-off assembly provided by the utility model, a gap is left between the outer side surface of the sliding block and the inner side surface of the sliding hole, and the gap is connected to the third installation gap for passing lubricating oil.

[0025] A second aspect of the utility model provides an engineering vehicle, comprising any one of the above-mentioned rear power take-off assemblies.

[0026] The rear power take-off assembly provided by the utility model is provided with a connecting assembly connected to both the gear shaft and the power output assembly, and the connecting assembly can be switched between a first position and a second position. In the first position, the connecting assembly is used to connect the gear shaft with the power output assembly, and the gear shaft can transmit the power output of the engine to the power output assembly, thereby causing the upper device to move. In the second position, the connecting assembly is used to separate the gear shaft from the power output assembly, and at this time, the gear shaft cannot transmit the power output of the engine to the power output assembly, thereby causing the upper device to stop moving, thereby achieving the purpose of reducing the power consumption of the engine. By sleeve-arranging a pushing assembly on the outer side surface of the gear shaft, and the first end of the pushing assembly is connected to the connecting assembly, the rear power take-off assembly can be made more compact as a whole while the connecting assembly is stably pushed to the second position, which is conducive to the miniaturization design of the rear power take-off assembly. By enclosing the outer side surfaces of the pushing assembly, the connecting assembly and the gear shaft to form a first installation gap, and the reset assembly is installed at the first installation gap, the rear power take-off assembly can be further made more compact as a whole while the connecting assembly is stably pushed to the first position, which is conducive to the miniaturization design of the rear power take-off assembly, and solves the problem that the rear power take-off assembly in the prior art cannot take into account both the operation stability and the volume.

[0027] The engineering vehicle of the utility model has at least the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the rear power take-off assembly provided by the utility model.

[0030] Figure 2 It is a cross-sectional structural schematic diagram of the rear power take-off assembly provided by the utility model.

[0031] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0032] Reference numerals:

[0033] 100, gear shaft; 110, gear; 120, middle shaft; 130, sliding hole;

[0034] 200, power output assembly; 210, output shaft; 220, slider; 230, output flange;

[0035] 300, connecting assembly; 310, dynamic friction plate; 320, static friction plate;

[0036] 400, a pushing assembly; 410, a first pushing member; 420, a second pushing member; 430, a connecting bearing; 440, a first thrust plate; 450, a second thrust plate;

[0037] 500, reset component;

[0038] 600, housing; 610, air inlet; 620, air flow channel;

[0039] 700. Bearing assembly; 710. Bearing part. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0043] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Combine the following Figures 1 to 3 The rear power take-off assembly of the utility model is described in detail.

[0046] like Figure 1 and Figure 2As shown, the first aspect of the utility model provides a rear power take-off assembly. The rear power take-off assembly includes a gear shaft 100, a power output assembly 200, a connecting assembly 300, a pushing assembly 400 and a reset assembly 500. The gear shaft 100 is used to mesh with the engine. The power output assembly 200 is used to connect with the upper equipment. The connecting assembly 300 is connected with the gear shaft 100 and the power output assembly 200. When in the first position, the connecting assembly 300 is used to connect the gear shaft 100 with the power output assembly 200; when in the second position, the connecting assembly 300 is used to separate the gear shaft 100 from the power output assembly 200. The pushing assembly 400 is sleeved on the gear shaft 100; the outer side surfaces of the pushing assembly 400, the connecting assembly 300 and the gear shaft 100 are enclosed to form a first installation gap; the pushing assembly 400 and the gear shaft 100 are axially slidably matched, and the first end of the pushing assembly 400 is connected to the connecting assembly 300, which is used to drive the connecting assembly 300 to move to the second position. The reset assembly 500 is located in the first installation gap, and the reset assembly 500 is connected to the gear shaft 100 and the pushing assembly 400 , and is used to drive the gear shaft 100 to move to the first position through the pushing assembly 400 .

[0047] In this embodiment, by setting the connecting assembly 300 that is connected to both the gear shaft 100 and the power output assembly 200, and the connecting assembly 300 can be switched between the first position and the second position, in the first position, the connecting assembly 300 is used to connect the gear shaft 100 with the power output assembly 200, and the gear shaft 100 can transfer the power output of the engine to the power output assembly 200, so that the upper device moves. In the second position, the connecting assembly 300 is used to separate the gear shaft 100 from the power output assembly 200, at which time the gear shaft 100 cannot transfer the power output of the engine to the power output assembly 200, so that the upper device stops moving, which serves the purpose of reducing the power consumption of the engine. By sleeve-arranging the pushing assembly 400 on the outer side surface of the gear shaft 100, and the first end of the pushing assembly 400 is connected to the connecting assembly 300, the rear power take-off assembly can be made more compact as a whole while the connecting assembly 300 is stably pushed to the second position, which is conducive to the miniaturization design of the rear power take-off assembly. By enclosing the outer side surfaces of the pushing component 400, the connecting component 300 and the gear shaft 100 to form a first installation gap, and installing the reset component 500 in the first installation gap, the connecting component 300 can be stably pushed to the first position while further making the overall rear power take-off assembly more compact, which is conducive to the miniaturized design of the rear power take-off assembly and solves the problem in the prior art that the rear power take-off assembly cannot take into account both operational stability and volume.

[0048] In addition, a vehicle equipped with the rear power take-off assembly of this embodiment does not need to install an auxiliary engine, which can avoid the problem of difficult-to-control emissions and is beneficial to environmental protection.

[0049] In some embodiments, the gear shaft 100 includes a gear 110 and a middle shaft 120. The gear 110 is mounted on one end of the middle shaft 120, and the gear 110 is used for engine meshing connection. The other end of the outer side of the middle shaft 120 is connected or separated with the power output assembly 200 through the connecting assembly 300.

[0050] In some embodiments, the rear power take-off assembly further includes a housing 600; a receiving cavity is formed inside the housing 600, the gear 110 of the gear shaft 100 is located outside the receiving cavity, and the central axis 120 of the gear shaft 100 is passed through the receiving cavity; the housing 600 is rotatably matched with the power output assembly 200. The housing 600 is used to protect the structure in the receiving cavity.

[0051] like Figure 3 As shown, in some embodiments, the connection assembly 300 includes a dynamic friction plate 310 and a static friction plate 320; the static friction plate 320 is sleeved on the outer side of the gear shaft 100 and fixedly connected to the gear shaft 100; the static friction plate 320 is sleeved on the outer side of the power output assembly 200 and fixedly connected to the power output assembly 200. Specifically, the static friction plate 320 is sleeved on the outer side of the middle shaft 120 and fixedly connected to the middle shaft 120. The dynamic friction plate 310 is sleeved on the outer side of the middle shaft 120, and the outer side of the dynamic friction plate 310 is fixedly connected to the output shaft 210. Along the axial direction of the gear shaft 100, the dynamic friction plate 310 and the static friction plate 320 are spaced apart, and the dynamic friction plate 310 can slide relative to the static friction plate 320 along the axial direction of the gear shaft 100. The connecting component 300 pushes the dynamic friction plate 310 or the static friction plate 320, so that the dynamic friction plate 310 and the static friction plate 320 abut against each other, thereby connecting the gear shaft 100 with the power output component 200. At this time, the gear shaft 100 can transmit the power output of the engine to the power output component 200 through the connecting component 300, so that the power output component 200 can drive the upper equipment to move.

[0052] like Figure 2 As shown, in some embodiments, a sliding hole 130 is formed inside the gear shaft 100; the power output assembly 200 includes an output shaft 210 and a slider 220. The output shaft 210 is sleeved on the outer side of the gear shaft 100, and the output shaft 210 and the outer side of the gear shaft 100 form a third installation gap; the connecting assembly 300 is located in the third installation gap. One end of the slider 220 is connected to the output shaft 210, and the other end is slidably matched with the sliding hole 130 along the axial direction of the gear shaft 100. Specifically, the output shaft 210 and the slider 220 are both provided with a receiving cavity, the gear shaft 100, the slider 220 and the output shaft 210 are coaxially arranged, the right end of the slider 220 is fastened and installed on the output shaft 210 by bolts, and the left end of the slider 220 extends into the sliding hole 130 and is slidably matched with the sliding hole 130 along the axial direction of the gear shaft 100. The output shaft 210 is installed in the receiving cavity of the housing 600 and is rotationally matched with the housing 600.

[0053] Furthermore, a gap is left between the outer side of the slider 220 and the inner side of the sliding hole 130, and the gap is connected to the third installation gap for passing lubricating oil. Specifically, the housing 600 is provided with an oil inlet, and the sliding hole 130 is connected to the oil inlet. The lubricating oil entering from the oil inlet can enter the third installation gap through the sliding hole 130 and the gap to achieve lubrication of the connecting assembly 300.

[0054] Furthermore, the power output assembly 200 further includes an output flange 230; the output flange 230 is connected to one end of the output shaft 210 away from the slider 220, and the output flange 230 is used to connect to the upper device. The output shaft 210 drives the upper device to rotate through the output flange 230. By providing the output flange 230, a mounting base can be provided for the upper device. By changing the structure of the output flange 230, it can be applied to different upper devices.

[0055] Specifically, the output flange 230 is coaxially arranged with the output shaft 210 , and the output flange 230 and the slider 220 are fastened to the output shaft 210 together by the same fastener, thereby saving the number of fasteners and reducing material costs.

[0056] In some embodiments, the pushing assembly 400 includes a first pushing member 410, a second pushing member 420 and a connecting bearing 430. The first pushing member 410 is sleeved on the gear shaft 100. The second pushing member 420 is sleeved on the gear shaft 100, and the first end of the second pushing member 420 is connected to the connecting assembly 300, and the outer side of the second pushing member 420, the connecting assembly 300 and the gear shaft 100 form a first installation gap. The connecting bearing 430 is sleeved on the outer side of the second pushing member 420 and is rotatably matched with the second pushing member 420, and the side of the connecting bearing 430 away from the second pushing member 420 is connected to the first pushing member 410. By installing and arranging the first pushing member 410, the second pushing member 420 and the connecting bearing 430 in a sleeve manner, the connecting assembly 300 can be stably moved while making the rear power take-off assembly more compact as a whole, which is conducive to the miniaturization design of the rear power take-off assembly. By providing the connecting bearing 430 , the second pushing member 420 can rotate synchronously with the connecting assembly 300 , thereby reducing the friction on the connecting assembly 300 and increasing the service life of the connecting assembly 300 .

[0057] Specifically, the first pusher 410, the second pusher 420 and the connecting bearing 430 are all coaxially arranged with the gear shaft 100, and are all located in the accommodating cavity of the housing 600. The first pusher 410 is connected to the second pusher 420 through the connecting bearing 430, and the second pusher 420 and the connecting bearing 430 are rotatably matched. The first pusher 410 can push the second pusher 420 to move along the axial direction of the gear shaft 100 through the connecting bearing 430, so that the first end of the second pusher 420 pushes the connecting assembly 300 to move to the second position.

[0058] Specifically, an air inlet 610 and an air outlet are formed on the housing 600, and an air flow channel 620 is formed between the housing 600 and the outer side surface of the first pusher 410. One end of the air flow channel 620 is connected to the air inlet 610, and the other end is connected to the air outlet. When the air outlet is closed, the external air source enters the air flow channel 620 from the air inlet 610, and the air pressure in the air flow channel 620 increases, so that the first pusher 410 pushes the connecting bearing 430 and the second pusher 420 to move rightward, so that the dynamic friction plate 310 and the static friction plate 320 of the connecting assembly 300 abut, and then the gear shaft 100 is connected to the output shaft 210, so that the power of the engine is transmitted to the output shaft 210, so that the output shaft 210 drives the upper equipment to move.

[0059] Furthermore, a first thrust plate 440 is provided between the first pusher 410 and the gear shaft 100; a second thrust plate 450 is provided between the second pusher 420 and the gear shaft 100; the hardness of the first thrust plate 440 and the second thrust plate 450 are both greater than the hardness of the gear shaft 100. The thrust plate can protect the gear shaft 100, increase the service life of the gear shaft 100, and reduce the cost.

[0060] In some embodiments, the reset assembly 500 includes an elastic member; the two ends of the elastic member are respectively connected to the push assembly 400 and the gear shaft 100, and are used for axial expansion and contraction deformation along the gear shaft 100. When the push assembly 400 pushes the connecting assembly 300 to move to the second position, the elastic member is compressed and deformed. After the pushing force of the pushing assembly 400 is withdrawn, the restoring force of the elastic member can push the connecting assembly to move to the first position through the pushing assembly 400, so that the connecting assembly 300 returns to the initial position.

[0061] Specifically, the elastic member includes a rubber ring or a spring. Exemplarily, the spring is located in the first installation gap, the spring is sleeved on the central axis 120 of the gear shaft 100, and the two ends of the spring are respectively in contact with the mounting surface of the central axis 120 and the mounting surface of the second pusher 420. When the first pusher 410 pushes the second pusher 420 to move to the right through the connecting bearing 430, the spring is compressed. After the internal gas in the air flow channel 620 is discharged, the spring restores its deformation to push the second pusher 420, the connecting bearing 430 and the first pusher 410 to move to the left, so that the dynamic friction plate 310 is separated from the static friction plate 320, thereby achieving the purpose of separating the output shaft 210 from the gear shaft 100.

[0062] In some embodiments, the rear power take-off assembly further includes a bearing assembly 700; the bearing assembly 700 is sleeved on one end of the middle shaft 120 of the gear shaft 100 close to the gear 110, and the bearing assembly 700 is rotatably matched with the middle shaft 120. Specifically, the bearing assembly 700 is located in the accommodating cavity of the housing 600 and is arranged at one end of the middle shaft 120 away from the power output assembly 200. By providing the bearing assembly 700, the axial force and radial force of the middle shaft 120 of the gear shaft 100 can be eliminated, thereby improving the operating reliability.

[0063] Furthermore, the bearing assembly 700 includes a plurality of bearing members 710. Along the axial direction of the gear shaft 100, the plurality of bearing members 710 are arranged at intervals and are all rotatably matched with the middle shaft 120. By increasing or decreasing the bearing members 710, the rear power take-off assembly can be adapted to vehicles of different lengths while ensuring the output torque.

[0064] Furthermore, the stress intensity of the bearing member 710 close to the gear 110 is greater than the stress intensity of the bearing member 710 far from the gear 110, which can reduce stress loss.

[0065] A second aspect of the utility model provides an engineering vehicle, which includes a rear power take-off assembly according to any of the above embodiments.

[0066] Because the engineering vehicle of this embodiment includes the rear power take-off assembly of any of the above embodiments, it has at least the above advantages, which will not be described in detail here.

[0067] Furthermore, the engineering vehicle includes a cement mixer truck or a sanitation truck.

[0068] Specifically, the sanitation vehicle includes a sprinkler truck or a sweeper truck.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A rear power take-off assembly, characterized in that: include: A gear shaft (100) is used for meshing connection with the engine; A power output assembly (200), used for connecting to a top-mounted device; a connecting assembly (300) connected to the gear shaft (100) and the power output assembly (200); when in a first position, the connecting assembly (300) is used to connect the gear shaft (100) and the power output assembly (200); when in a second position, the connecting assembly (300) is used to separate the gear shaft (100) and the power output assembly (200); A pushing component (400) is sleeved on the gear shaft (100), and the outer side surfaces of the pushing component (400), the connecting component (300) and the gear shaft (100) are enclosed to form a first installation gap; the pushing component (400) and the gear shaft (100) are slidably matched along the axial direction, and the first end of the pushing component (400) is connected to the connecting component (300) for driving the connecting component (300) to move to the second position; A reset component (500) is located in the first installation gap, and the reset component (500) is connected to the gear shaft (100) and the pushing component (400), and is used to drive the gear shaft (100) to move to the first position through the pushing component (400).

2. The rear power take-off assembly according to claim 1, characterized in that: The pushing assembly (400) comprises: A first pushing member (410), sleeved on the gear shaft (100); a second pushing member (420) sleeved on the gear shaft (100), wherein a first end of the second pushing member (420) is connected to the connecting assembly (300), and an outer side surface of the second pushing member (420), the connecting assembly (300) and the gear shaft (100) forms the first installation gap; The connecting bearing (430) is sleeved on the outer side surface of the second pushing member (420) and is rotatably matched with the second pushing member (420). A side surface of the connecting bearing (430) away from the second pushing member (420) is connected to the first pushing member (410).

3. The rear power take-off assembly according to claim 2, characterized in that: A first thrust plate (440) is arranged between the first pushing member (410) and the gear shaft (100); a second thrust plate (450) is arranged between the second pushing member (420) and the gear shaft (100); the hardness of the first thrust plate (440) and the hardness of the second thrust plate (450) are both greater than the hardness of the gear shaft (100).

4. The rear power take-off assembly according to claim 1, characterized in that: The resetting component (500) comprises an elastic member; two ends of the elastic member are respectively connected to the pushing component (400) and the gear shaft (100) and are used for telescopic deformation along the axial direction of the gear shaft (100).

5. The rear power take-off assembly according to claim 1, characterized in that: Also includes: The bearing assembly (700) is sleeved on one end of the central axis (120) of the gear shaft (100) close to the gear (110), and the bearing assembly (700) is rotatably matched with the central axis (120).

6. The rear power take-off assembly according to claim 5, characterized in that: The bearing assembly (700) comprises: A plurality of bearing members (710) are arranged at intervals along the axial direction of the gear shaft (100) and are all rotatably matched with the central shaft (120).

7. The rear power take-off assembly according to claim 6, characterized in that: The stress intensity of the bearing component (710) close to the gear (110) is greater than the stress intensity of the bearing component (710) far from the gear (110).

8. The rear power take-off assembly according to any one of claims 1 to 7, characterized in that: A sliding hole (130) is formed inside the gear shaft (100); the power output assembly (200) comprises: The output shaft (210) is sleeved on the outer side surface of the gear shaft (100) and forms a third installation gap with the outer side surface of the gear shaft (100); the connection assembly (300) is located in the third installation gap; A sliding block (220), one end of the sliding block (220) being connected to the output shaft (210), and the other end of the sliding block being slidingly matched with the sliding hole (130) along the axial direction of the gear shaft (100).

9. The rear power take-off assembly according to claim 8, characterized in that: A gap is left between the outer side surface of the sliding block (220) and the inner side surface of the sliding hole (130), and the gap is connected to the third installation gap for passing lubricating oil.

10. An engineering vehicle, characterized in that: Comprising the rear power take-off assembly as described in any one of claims 1 to 9.

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