Transmission device and crushing equipment

Abstract

The utility model belongs to the technical field of mechanical production equipment, and particularly relates to a transmission device and crushing equipment. An oil inlet channel system and an oil return channel system are arranged in a shell of the transmission device, a first channel system is arranged in a first bearing seat, a second channel system is arranged in a second bearing seat, and an oil supply pipeline system is arranged in the oil inlet channel system. Oil is directly sprayed to a bearing in the first bearing seat through the oil supply pipeline system and the first channel system, oil is directly sprayed to a bearing in the second bearing seat through the oil supply pipeline system and the second channel system, the oil is directly sprayed into the bearing in the mode, and therefore the bearing is rapidly cooled.

Description

Technical Field

[0001] The present application belongs to the technical field of mechanical production equipment, and specifically relates to transmission devices and crushing equipment. Background Art

[0002] In mechanical production and processing, it is necessary to complete the production and processing by crushing materials. During the operation of such equipment, the shaft inside the transmission device needs to run at high speed, and the bearings in the bearing seats set on the shaft need to be continuously lubricated to reduce the temperature of the bearings. In the existing scheme, unified oil circuit lubrication is adopted to lubricate the bearings through the oil injection holes of the sleeve. Since the oil injection holes of the sleeve are very small and easy to be blocked, this causes insufficient lubricating oil in the bearings and increases the bearing temperature, thus affecting the service life of the transmission device. Utility Model Content

[0003] One of the invention purposes of the present application is to provide a transmission device, which directly sprays oil to lubricate the bearings in the bearing seats in the transmission device by adding pipelines, thereby reducing the problem of temperature increase of the bearings and ensuring the service life of the transmission device.

[0004] Another invention object of the present application is to provide a comminution device, which includes the above-mentioned transmission device.

[0005] According to an embodiment of the present application, a first aspect provides a transmission device, the transmission device comprising:

[0006] A housing, wherein an oil inlet channel system and an oil return channel system are provided on the housing;

[0007] A shaft body, the shaft body is arranged in the inner cavity of the housing, one end of the shaft body is provided with a first bearing seat, the other end of the shaft body is provided with a second bearing seat, the first bearing seat is provided with a first channel system respectively connected with the oil inlet channel system and the oil return channel system, the other end of the shaft body opposite to the shaft body is provided with a second bearing seat, the second bearing seat is provided with a second channel system respectively connected with the oil inlet channel system and the oil return channel system;

[0008] An oil supply pipeline system is arranged in the oil inlet channel system. The oil supply pipeline system sprays oil for lubrication to the bearing in the first bearing seat through the first channel system, and sprays oil for lubrication to the bearing of the second bearing seat through the second channel system.

[0009] In one embodiment, the channel system includes a first channel, a second channel and a third channel, the first channel is connected to the oil inlet channel system, the oil supply pipeline system sprays oil for lubrication to the first bearing seat through the first channel, the second channel is connected to the oil groove of the first bearing seat, one end of the third channel is connected to the second channel, and the other end is connected to the sealing ring of the first bearing seat, the sealing ring of the first bearing seat is connected to the oil return channel system, and the first bearing seat returns oil to the oil return channel system through the second channel and the third channel.

[0010] In one embodiment, the size of the first bearing seat is larger than that of the second bearing seat, the cross-sectional area of ​​the shell near the first bearing seat is larger than the cross-sectional area of ​​the shell near the second bearing seat, and the angle between the second channel and the third channel is 35° to 45°.

[0011] In one embodiment, the second channel system includes a fourth channel, the fourth channel is connected to the oil inlet channel system, the oil groove of the second bearing seat and the sealing ring of the second bearing seat are respectively connected to the oil supply pipeline system and return oil to the oil return channel system.

[0012] In one embodiment, the oil supply pipeline system includes a flow control module.

[0013] In one embodiment, a counterweight is provided at one end of the shaft body close to the first bearing seat, one end of the bearing close to the first bearing seat is a power input end, and one end of the shaft body close to the second bearing seat is a power output end.

[0014] In one embodiment, the transmission device further includes an outer sleeve and an axial drive unit, the shell is disposed in the outer sleeve, and the axial drive unit drives the shell to reciprocate along the axial direction of the shaft body.

[0015] In one embodiment, the axial drive unit includes a first hydraulic drive unit and a second hydraulic drive unit, a closed oil injection chamber is arranged between the outer sleeve and the shell, the shell is provided with a push plate, the push plate corresponds to the oil injection chamber, the first hydraulic drive unit transports hydraulic oil into the oil injection chamber to control the push plate to move along the first direction, and the second hydraulic drive unit transports hydraulic oil into the oil injection chamber to control the push plate to move in the opposite direction of the first direction.

[0016] In one embodiment, the transmission device further includes a pressing unit, which is disposed on the outer sleeve. The pressing unit includes a pressing portion, which faces the shell and can apply a pressing force to the shell to restrict the shell in the inner cavity of the outer sleeve.

[0017] According to an embodiment of the present application, a second aspect provides a pulverizing device, comprising the transmission device.

[0018] The transmission device of the present application arranges an oil inlet channel system and an oil return channel system in the housing of the transmission device, arranges a first channel system in the first bearing seat, arranges a second channel system in the second bearing seat, and arranges an oil supply pipeline system in the oil inlet channel system. Oil is directly sprayed to the bearing in the first bearing seat through the oil supply pipeline system and the first channel system, and oil is directly sprayed to the bearing in the second bearing seat through the oil supply pipeline system and the second channel system. In this way, oil is directly sprayed into the bearings, thereby achieving rapid cooling of the bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of a transmission device in one embodiment of the present application;

[0020] Figure 2 for Figure 1 A local enlarged schematic diagram in FIG.

[0021] Figure 3 It is a schematic structural diagram of a transmission device in another embodiment of the present application.

[0022] Description of Figure Numbers:

[0023] 100, housing; 110, oil inlet channel system; 120, oil return channel system; 130, push plate;

[0024] 200, shaft body;

[0025] 300, first bearing seat; 311, first channel; 312, second channel; 313, third channel;

[0026] 400, second bearing seat; 410, fourth channel;

[0027] 500. Oil supply pipeline system;

[0028] 600, outer jacket; 610, oil filling chamber;

[0029] 700, axial drive unit; 710, first hydraulic drive unit; 720, second hydraulic drive unit;

[0030] 800. Pressure unit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0033] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0034] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] As mentioned in the background, in mechanical production and processing, it is necessary to complete the production and processing by crushing materials. During the operation of such equipment, the shaft inside the transmission device needs to run at high speed, and it is also necessary to continuously lubricate the bearings in the bearing seat arranged on the shaft to reduce the temperature of the bearings. In the existing scheme, a unified oil circuit lubrication is adopted to lubricate the bearings through the oil spray holes of the shaft sleeves. Since the oil spray holes of the shaft sleeves are very small and easy to be clogged, this causes insufficient lubricating oil in the bearings and increases the bearing temperature, thereby affecting the service life of the transmission device. In order to better solve this problem, the researchers of this application proposed to set an oil supply pipeline system in the transmission device, and directly spray oil to the bearings of the bearing seat through the oil supply pipeline system, so as to achieve rapid cooling of the bearings, which better solves the problem of increased bearing temperature when the transmission device is running at high speed.

[0036] like Figure 1 As shown, Figure 1: is a cross-sectional schematic diagram of a transmission device in an embodiment of the present application. The transmission device includes a housing 100, a shaft 200, a first bearing seat 300, a second bearing seat 400 and an oil supply pipeline system 500, wherein the shaft 200 is arranged in the inner cavity of the housing 100, the first bearing seat 300 is arranged at one end of the shaft 200, the second bearing seat 400 is arranged at the other end of the shaft 200, and the oil supply pipeline system 500 is arranged in the housing 100 and is connected to the first bearing seat 300 and the second bearing seat 400 respectively. When the shaft 200 is working, the oil supply pipeline system 500 can directly spray oil to the bearing in the first bearing seat 300 and spray oil to the bearing in the second bearing seat 400, so as to cool the bearings.

[0037] It should be noted that the inner cavity of the housing 100 can accommodate the shaft body 200, the first bearing seat 300 and the second bearing seat 400, and the bearing cap in the first bearing seat 300 and the bearing cap in the second bearing seat 400 are respectively connected and fixed to the housing 100. When the shaft body 200, the first bearing seat 300 and the second bearing seat 400 are arranged in the inner cavity of the housing 100, the housing 100 and the shaft body 200, the first bearing seat 300 and the second bearing seat 400 can be understood as a whole. In addition, since the housing 100 has a certain thickness, a hole can be drilled in the housing 100 for installing the oil supply pipeline system 500. The oil supply pipeline system 500 can be a circulating oil system, which can be understood that after the oil supply pipeline system 500 sprays oil into the first bearing seat 300 and the second bearing seat 400, the oil for cooling the bearing can flow back to the oil supply pipeline system 500 again.

[0038] In this embodiment, the researchers intend to reduce the temperature of the bearing and ensure the service life of the transmission device by spraying oil directly into the bearing in the bearing seat.

[0039] Specifically, the housing 100 is provided with an oil inlet channel system 110 and an oil return channel system 120; the shaft body 200 is provided in the inner cavity of the housing 100, a first bearing seat 300 is provided at one end of the shaft body 200, a second bearing seat 400 is provided at the other end of the shaft body 200, the first bearing seat 300 is provided with a first channel system respectively connected to the oil inlet channel system 110 and the oil return channel system 120, and a second bearing seat 400 is provided at the other opposite end of the shaft body 200, and the second bearing seat 400 is provided with a second channel system respectively connected to the oil inlet channel system 110 and the oil return channel system 120. It should be noted that the oil inlet channel system 110 can be understood as being composed of a plurality of branch channels generated by drilling holes in the housing 100, the first channel system can be understood as being composed of a plurality of branch channels formed by drilling holes in the first bearing seat 300, and the second channel system can be understood as being composed of a plurality of branch channels formed by drilling holes in the second bearing seat 400.

[0040] The oil supply pipeline system 500 is arranged in the oil inlet channel system 110, and the oil supply pipeline system 500 sprays oil to lubricate the bearing in the first bearing seat 300 through the first channel system, and sprays oil to lubricate the bearing of the second bearing seat 400 through the second channel system. It should be noted that the size of the oil injection port of the oil supply pipeline system 500 can be designed as needed.

[0041] In this embodiment, when the transmission device rotates at a high speed, the oil supply pipeline system 500 disposed in the housing 100 can spray oil to the bearing in the first bearing seat 300, and spray oil to the bearing in the second bearing seat 400, so as to cool the bearing. Specifically, the oil supply pipeline system 500 directly sprays oil to the bearing in the first bearing seat 300 through the first channel system in the first bearing seat 300, and directly sprays oil to the bearing in the second bearing seat 400 through the second channel system in the second bearing seat 400, in this way, the temperature of the bearing is prevented from rising, thereby ensuring the service life of the transmission device.

[0042] In one embodiment, see Figure 1 and Figure 2 As shown, the first channel system includes a first channel 311, a second channel 312 and a third channel 313, wherein the first channel 311 is connected to the oil inlet channel system 110, the oil supply pipeline system 500 sprays oil to the first bearing seat 300 through the first channel 311 for lubrication, the second channel 312 is connected to the oil groove of the first bearing seat 300, one end of the third channel 313 is connected to the second channel 312, and the other end is connected to the sealing ring of the first bearing seat 300, the sealing ring of the first bearing seat 300 is connected to the oil return channel system 120, and the first bearing seat 300 returns oil to the oil return channel system 120 through the second channel 312 and the third channel 313. It should be noted that the oil entering the oil return channel system 120 can be circulated into the oil inlet channel system 110 again.

[0043] In this embodiment, the first channel 311, the second channel 312 and the third channel 313 are used to realize the oil spraying lubrication of the bearing in the first bearing seat 300 and the recovery after the oil spraying. The oil supply pipeline system 500 can spray oil to the bearing of the first bearing seat 300 through the first channel 311, and the oil groove in the first bearing seat 300 can provide oil storage to ensure that there is enough oil to supply the first bearing seat 300. This can make the oil lubricate the bearing evenly and continuously, and also help to disperse and absorb the heat generated by the operation of the bearing, playing a cooling role. In addition, the setting of the sealing ring in the first bearing seat 300 is intended to prevent oil leakage and ensure that the oil can flow in a predetermined path. Through the connection between the sealing ring and the oil return channel system 120, the used oil can be effectively recovered. That is, the oil for cooling the bearing in the first bearing seat 300 can pass through the second channel 312, the third channel 313 and the sealing ring, and finally flow back to the oil return channel system 120.

[0044] Furthermore, in one embodiment, the size of the first bearing seat 300 is larger than the size of the second bearing seat 400, the cross-sectional area of ​​the shell 100 near the first bearing seat 300 is larger than the cross-sectional area of ​​the shell 100 near the second bearing seat 400, and the angle between the second channel 312 and the third channel 313 is 35° to 45°.

[0045] In this embodiment, the transmission device has different requirements for transmitting torque in actual operation, so the size of the bearing seat is also different when selecting. In one working condition, the size of the first bearing seat 300 is larger than the size of the second bearing seat 400. For this reason, the researchers designed the cross-sectional area of ​​the housing 100 close to the first bearing seat 300 to be larger than the cross-sectional area of ​​the housing 100 close to the second bearing seat 400. At the same time, the researchers also considered that in one case, a sealing layer may be provided on the side of the first bearing seat 300 close to the housing 100. If the second channel 312 is directly connected to the first bearing seat 300, it is necessary to destroy the sealing layer and affect the sealing performance of the bearing seat. For this reason, an angle is set between the second channel 312 and the third channel 313, and the angle range is 35° to 45°, so that the oil in the oil groove in the first bearing seat 300 can enter the sealing ring of the first bearing seat 300 through the second channel 312 and the third channel 313, and then flow back to the oil return channel system 120 through the sealing ring.

[0046] In another embodiment, see Figure 1 As shown, the second channel system includes a fourth channel 410, the fourth channel 410 is connected to the oil inlet channel system 110, the oil supply pipeline system 500 sprays oil for lubrication to the second bearing seat 400 through the third channel 313, and the oil groove of the second bearing seat 400 and the sealing ring of the second bearing seat 400 are respectively connected to the oil supply pipeline system 500 and return oil to the oil return channel system 120.

[0047] In this embodiment, the researchers set a fourth channel 410 in the second bearing seat 400 so that the oil in the oil supply pipeline system 500 can be sprayed to the bearing in the second bearing seat 400 through the fourth channel 410. In the second bearing, the oil after cooling the bearing can flow back to the oil return channel system 120 through the oil groove in the second bearing seat 400 and the sealing ring in the second bearing seat 400.

[0048] In one embodiment, the oil supply pipeline system 500 includes a flow control module.

[0049] In this embodiment, the researchers set up a flow control module, such as a flow meter module, in the oil supply pipeline system 500. In this way, the situation of the oil supply pipeline system 500 spraying oil to the first bearing seat 300 and the second bearing seat 400 can be obtained in real time.

[0050] In one embodiment, a counterweight is provided at one end of the shaft body 200 close to the first bearing seat 300, the end of the bearing close to the first bearing seat 300 is the power input end, and the end of the shaft body 200 close to the second bearing seat 400 is the power output end.

[0051] In this embodiment, the researchers set a counterweight at one end of the shaft body 200 close to the first bearing seat 300 to help balance the mass of the entire shaft body 200, especially in the power input stage. The transmission device will encounter the maximum unbalanced force at startup. Therefore, in the startup stage, the counterweight helps to reduce the vibration and stress at startup, thereby protecting the bearing from excessive load. Secondly, setting the power input on the side with the counterweight can make the power transmission from the input end to the output end smoother. Since the counterweight improves the mass distribution of the entire system, it helps to maintain the stability of the shaft body 200 during high-speed rotation and reduces vibration caused by imbalance; and setting the power output end on the side without the counterweight allows this side of the shaft body 200 to focus on the effective transmission and utilization of power.

[0052] In one embodiment, see Figure 1 and Figure 3 As shown, the transmission device further includes a sleeve 600 and an axial drive unit 700 . The housing 100 is disposed in the sleeve 600 . The axial drive unit 700 drives the housing 100 to reciprocate along the axial direction of the shaft body 200 .

[0053] In this embodiment, the researchers took into account that the housing 100 in the transmission device needs to be driven to move to the workstation in advance, and then perform the torque transmission. To this end, the researchers set a jacket 600 and an axial drive unit 700 in the transmission device. The housing 100 is arranged in the jacket 600, and the jacket 600 can protect the housing 100, and the axial drive unit 700 can drive the housing 100 to reciprocate along the axial direction of the shaft body 200. It should be noted that during the movement of the housing 100, the shaft body 200, the first bearing seat 300 and the second bearing seat 400 arranged in the inner cavity of the housing 100 move synchronously with the housing 100. When the axial drive unit 700 transports the housing to the designated workstation, the shaft body 200 begins to rotate.

[0054] Further, in one embodiment, see Figure 1 and Figure 3 As shown, the axial drive unit 700 includes a first hydraulic drive unit 710 and a second hydraulic drive unit 720. A closed oil injection chamber 610 is provided between the outer sleeve 600 and the shell 100. The shell 100 is provided with a push plate 130. The push plate 130 corresponds to the oil injection chamber 610. The first hydraulic drive unit 710 conveys hydraulic oil into the oil injection chamber 610 to control the push plate 130 to move in a first direction. The second hydraulic drive unit 720 conveys hydraulic oil into the oil injection chamber 610 to control the push plate 130 to move in the opposite direction of the first direction.

[0055] In this embodiment, the researchers designed the axial drive unit 700 as a first hydraulic drive unit 710 and a second hydraulic drive unit 720. Through hydraulic drive, the housing 100 can move relative to the outer sleeve 600 along the extension direction of the shaft body 200, so that the housing 100 drives the shaft body 200 to enter a predetermined position. The first direction is the extension direction of the shaft body 200, which can be referred to in Figure 1 The direction pointed by arrow a.

[0056] In one embodiment, see Figure 1 and Figure 3 As shown, the transmission device also includes a pressing unit 800, which is disposed on the outer sleeve 600. The pressing unit 800 includes a pressing portion, which faces the shell 100 and can apply a pressing force to the shell 100 to restrict the shell 100 in the inner cavity of the outer sleeve 600.

[0057] In this embodiment, the researchers considered that when the housing 100 moves relative to the outer jacket 600, if the position of the housing 100 is not fixed, the housing 100 may move radially relative to the outer jacket 600 under external force, which affects the stability of the transmission device. In order to better solve this problem, the researchers set a pressing unit 800 on the outer jacket 600, and the pressing part in the pressing unit 800 can apply a force to the housing 100, thereby reducing the movement of the housing 100 relative to the outer jacket 600. It should be noted that the pressing part in the pressing unit 800 can include a spring, and the force generated by the compression of the spring presses on the housing 100.

[0058] The present application also proposes a pulverizing device, wherein the pulverizing device includes the above-mentioned transmission device. When the above-mentioned transmission device is installed in the pulverizing device, when the transmission device is running at a high speed, the bearings in the first bearing seat 300 and the bearings in the second bearing seat 400 can be cooled down well, and the damage of the transmission device is well avoided, so that the pulverizing device has better stability.

[0059] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A transmission device, characterized in that: The transmission device comprises: A housing (100), wherein the housing (100) is provided with an oil inlet channel system (110) and an oil return channel system (120); A shaft body (200), the shaft body (200) being arranged in the inner cavity of the housing (100), a first bearing seat (300) being arranged at one end of the shaft body (200), a second bearing seat (400) being arranged at the other end of the shaft body (200), the first bearing seat (300) being arranged with a first channel system respectively connected to the oil inlet channel system (110) and the oil return channel system (120), the second bearing seat (400) being arranged with a second channel system respectively connected to the oil inlet channel system (110) and the oil return channel system (120); An oil supply pipeline system (500) is arranged in the oil inlet channel system (110), and the oil supply pipeline system (500) sprays oil for lubrication to the bearing in the first bearing seat (300) through the first channel system, and sprays oil for lubrication to the bearing of the second bearing seat (400) through the second channel system.

2. The transmission device according to claim 1, characterized in that: The first channel system comprises a first channel (311), a second channel (312) and a third channel (313); the first channel (311) is connected to the oil inlet channel system (110); the oil supply pipeline system (500) sprays oil to lubricate the first bearing seat (300) through the first channel (311); the second channel (312) is connected to the oil groove of the first bearing seat (300); one end of the third channel (313) is connected to the second channel (312), and the other end is connected to the sealing ring of the first bearing seat (300); the sealing ring of the first bearing seat (300) is connected to the oil return channel system (120); the first bearing seat (300) returns oil to the oil return channel system (120) through the second channel (312), the third channel (313) and the sealing ring of the first bearing seat (300).

3. The transmission device according to claim 2, characterized in that: The size of the first bearing seat (300) is larger than the size of the second bearing seat (400), the cross-sectional area of ​​the shell (100) close to the first bearing seat (300) is larger than the cross-sectional area of ​​the shell (100) close to the second bearing seat (400), and the angle between the second channel (312) and the third channel (313) is 35° to 45°.

4. The transmission device according to claim 3, characterized in that: The second channel system comprises a fourth channel (410), the fourth channel (410) being in communication with the oil inlet channel system (110), the oil groove of the second bearing seat (400) and the sealing ring of the second bearing seat (400) being respectively in communication with the oil supply pipeline system (500) and returning oil to the oil return channel system (120).

5. The transmission device according to claim 1, characterized in that: The oil supply pipeline system (500) comprises a flow control module.

6. The transmission device according to claim 1, characterized in that: A counterweight is provided at one end of the shaft body (200) close to the first bearing seat (300); one end of the bearing close to the first bearing seat (300) is a power input end; and one end of the shaft body (200) close to the second bearing seat (400) is a power output end.

7. The transmission device according to claim 1, characterized in that: The transmission device further comprises an outer sleeve (600) and an axial drive unit (700), the housing (100) being disposed inside the outer sleeve (600), and the axial drive unit (700) driving the housing (100) to reciprocate along the axial direction of the shaft body (200).

8. The transmission device according to claim 7, characterized in that: The axial drive unit (700) includes a first hydraulic drive unit (710) and a second hydraulic drive unit (720); a closed oil injection chamber (610) is provided between the outer sleeve (600) and the shell (100); the shell (100) is provided with a push plate (130); the push plate (130) corresponds to the oil injection chamber (610); the first hydraulic drive unit (710) transports hydraulic oil into the oil injection chamber (610) to control the push plate (130) to move in a first direction; the second hydraulic drive unit (720) transports hydraulic oil into the oil injection chamber (610) to control the push plate (130) to move in the opposite direction of the first direction.

9. The transmission device according to claim 7, characterized in that: The transmission device further comprises a pressing unit (800), wherein the pressing unit (800) is arranged on the outer sleeve (600), and the pressing unit (800) comprises a pressing portion, wherein the pressing portion faces the shell (100) and can apply a pressing force to the shell (100) to restrict the shell (100) in the inner cavity of the outer sleeve (600).

10. A crushing device, characterized in that: A transmission device comprising any one of claims 1 to 9.

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