WO2024045209A1

WO2024045209A1 - Split connecting structure for output shaft of universal power unit

Info

Publication number: WO2024045209A1
Application number: PCT/CN2022/117630
Authority: WO
Inventors: 蒋成林
Original assignee: 重庆拓思动力科技有限公司
Priority date: 2022-09-02
Filing date: 2022-09-07
Publication date: 2024-03-07

Abstract

Disclosed is a split connecting structure for an output shaft of a universal power unit, comprising a front housing and an output shaft rotatably mounted in the front housing. The output shaft comprises a main shaft and a transmission shaft arranged separately; the front end of the front housing is provided with an assembly space; the main shaft is rotatably mounted in the front housing, and the front end of the main shaft extends into the assembly space; the transmission shaft is directly or indirectly and detachably connected to the front end of the main shaft, and a shaft extension end of the transmission shaft extends out of the front housing. According to the present application, the output shaft is configured in a split mode, so that when different working machines need to be installed thereon, the structural shape of the shaft extension end of the output shaft can be changed simply by replacing the transmission shaft so as to adapt to different working machines, without the need to replace the entire output shaft; therefore, the replacement is simpler and more convenient, and the universality is better.

Description

Universal power unit output shaft split connection structure

Technical field

The invention relates to the technical field of general power, and in particular to a split connection structure of an output shaft of a general power unit.

Background technique

The Chinese invention patent application with publication number CN112602255A discloses an electric power unit mounted on an object. It is equipped with a motor and electrical components for driving the motor, and can be mounted on various working machines; in When in use, the electric power unit is connected to the mounted object through the shaft of the motor to provide power to the mounted object. However, due to different mounting objects, the input end structures and shapes of the mounting objects are diverse. When this kind of electric power unit is mounted on different mounting objects, it is necessary to set up a shaft that matches the mounting object. The production and management costs increase, and the storage cost increases. There are certain inconveniences during transportation, and the versatility is subject to certain limitations.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a highly versatile universal power unit output shaft split connection structure.

The technical solution adopted by the present invention is:

A universal power unit output shaft split connection structure, including a front housing and an output shaft rotatably installed in the front housing. It is characterized in that the output shaft includes a main body shaft and a transmission shaft that are separately arranged. The front end of the front housing has an assembly space, the main body shaft is rotatably installed in the front housing, and its front end extends into the assembly space, and the transmission shaft is directly or indirectly detachably connected to the main body shaft. The front end of the transmission shaft extends out of the front housing.

According to at least one embodiment of the present invention, when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, the split connection mechanism further includes a transmission flange, and the transmission flange can The transmission shaft is detachably connected to the front end of the main body shaft, and the transmission shaft is detachably connected to the transmission flange. When the transmission shaft is directly detachably connected to the front end of the main body shaft, the transmission shaft is detachably connected to the front end of the main body shaft. The shaft is detachably connected to the front end of the main body shaft.

According to at least one embodiment of the present invention, a locking nut is further included. The locking nut is threadedly connected to the front housing and divides the assembly space into a first space and a second space. The first space is located at Outside the locking nut, the second space is located inside the locking nut. The main body shaft is installed on the front housing through a bearing, and its front end passes through the locking nut and extends into within the first space.

According to at least one embodiment of the present invention, the main body shaft has an assembly section with a shoulder at the rear end of the assembly section. The assembly section is installed on the bearing, and the bearing is installed on the front shell. On the body and in the second space inside the lock nut, the main body shaft is limited by the shoulder, and the bearing is limited by the front housing and the lock nut.

According to at least one embodiment of the present invention, an oil seal is further included. The lock nut has an accommodating space inside, and the oil seal is sleeved on the assembly section and located in the accommodating space.

According to at least one embodiment of the present invention, the lock nut is provided with a through hole for the main body shaft to pass through, and the inner diameter of the through hole is larger than the outer diameter of the assembly section.

According to at least one embodiment of the present invention, when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, the transmission flange is embedded in the first space and is detachably connected to the first space. on the main body axis and rotates with the main body axis.

According to at least one embodiment of the present invention, the transmission flange is connected to the main body shaft through spline connection, key connection, profile connection or pin connection.

According to at least one embodiment of the present invention, when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, studs extending toward the transmission shaft are provided along the circumference of the transmission flange, so The fixed end of the transmission shaft has a fixing hole that matches the stud. The stud passes through the fixing hole and is locked and fixed by a nut.

According to at least one embodiment of the present invention, when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, a threaded hole is axially provided along the front end of the main body shaft, and a locking bolt passes through The inner hole of the flange is threadedly connected in the threaded hole, and the fixed end of the transmission shaft is provided with an avoidance recess that is recessed toward its shaft extension end to avoid the locking bolt.

According to at least one embodiment of the present invention, when the transmission shaft is directly and detachably connected to the front end of the main body shaft, the fixed end of the transmission shaft extends into the first space and is connected with the The front end of the main body shaft is detachably connected.

According to at least one embodiment of the present invention, the transmission shaft and the main body shaft are connected through spline connection, key connection, profile connection or pin connection.

According to at least one embodiment of the present invention, when the transmission shaft is directly and detachably connected to the front end of the main body shaft, a threaded hole is axially provided along the front end of the main body shaft, and a threaded hole is provided along the front end of the main body shaft. There are through holes extending through both ends of the transmission shaft in the axial direction, and a locking bolt passes through the through hole of the transmission shaft and is threadedly connected in the threaded hole.

According to at least one embodiment of the present invention, the extension end of the transmission shaft is provided with external threads, keyways, threaded holes, splines or tapered surfaces.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the drawings that need to be used in the description of the specific implementations or the prior art will be briefly introduced below. Throughout the drawings, similar elements or portions are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn to actual scale.

Figure 1 is an exploded view of the split connection structure of the output shaft of the general power unit provided by the embodiment of the present application.

Figure 2 is a schematic diagram of the installation structure of the main shaft and transmission flange provided by the embodiment of the present application.

Figure 3 is a schematic diagram of the partial installation structure of the main body shaft provided by the embodiment of the present application.

Figure 4 is a schematic structural diagram of the transmission flange provided by the embodiment of the present application.

Figure 5 is a schematic structural diagram of a transmission shaft provided by an embodiment of the present application.

Figure 6 is another structural schematic diagram of a transmission shaft provided by an embodiment of the present application.

Figure 7 is a schematic diagram of the application of the split connection structure of the output shaft of the universal power unit provided by the embodiment of the present application.

Figure 8 is an exploded view of the split connection structure of the output shaft of the general power unit provided by the embodiment of the present application.

Figure 9 is a schematic diagram of the main body shaft installation structure provided by the embodiment of the present application.

Figure 10 is a schematic diagram of the partial installation structure of the main body shaft provided by the embodiment of the present application.

Figure 11 is a schematic structural diagram of the transmission shaft provided by the embodiment of the present application.

Figure 12 is another structural schematic diagram of a transmission shaft provided by an embodiment of the present application. .

Figure 13 is a schematic diagram of the application of the split connection structure of the output shaft of the general power unit provided by the embodiment of the present application.

Figure 14 is a schematic diagram of another application of the split connection structure of the output shaft of the general power unit provided by the embodiment of the present application.

Detailed ways

The embodiments of the technical solution of the present invention will be described in detail below with reference to specific examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and are therefore only examples and cannot be used to limit the scope of the present invention.

The terms or words used in this specification and the claims should not be limited to their common or dictionary meanings, but should be based on the concept of "the inventor appropriately defines the terms in order to explain his own invention in the best way." In principle, only the meanings and concepts consistent with the technical ideas of the present invention will be interpreted.

As a component of the universal power unit, the connection structure of this application is used to output the driving power of the universal power unit to the working machinery when the universal power unit is mounted on different working machines. Working machinery includes but is not limited to construction machinery, agricultural machinery, garden machinery, etc. Since the universal power unit is mounted on different working machinery of known structure and size, it is required that the universal power unit should be compact and miniaturized to suit Equipped with different working machines to improve its versatility.

Referring to Figures 1 to 3, the present application provides a universal power unit output shaft split connection structure, including a front housing 120 and an output shaft rotatably installed in the front housing 120. The output shaft includes a split main body shaft. 110 and transmission shaft 180, the main shaft 110 is rotatably installed in the front housing 120; there is an assembly space at the front end of the front housing 120, and a transmission flange 160 is detachably connected to the front end of the main shaft 110 and is located in the assembly space Inside, the transmission shaft 180 is detachably connected to the transmission flange 160, and its shaft extension extends out of the front housing 120.

This application separates the output shaft, including the main shaft 110 that is rotatably installed in the front housing 120 and the transmission shaft 180 that is detachably connected to the main shaft 110 through the transmission flange 160; on the one hand, when it is necessary to carry different When using a working machine, you only need to replace the transmission shaft 180 to change the structural shape of the shaft extension end of the output shaft to adapt to different working machines. There is no need to replace the entire output shaft. The replacement is simpler and more convenient, and the versatility is better. On the other hand, during packaging, transportation and storage, since the transmission shaft 180 is detachable, the size of the main body of the power unit can be reduced, thereby reducing the size of the packaging box, making packaging, transportation and storage more convenient, and it can be disassembled The transmission shaft 180 can be stored separately, which can better prevent the transmission shaft 180 from being damaged by rust, scratches, etc.

In order to connect the separately arranged transmission shaft 180 with the main body shaft 110 to transmit torque, the present application also includes a transmission flange 160 through which the main body shaft 110 and the transmission shaft 180 are connected.

In order to ensure the versatility of the universal power unit, it is necessary to ensure that the overall dimensions do not change on the basis of increasing the structure. It is necessary to ensure that the assembly surface of the transmission flange 160 is flush with the front housing 120, so the output shaft output end bearing 130 And the position of oil seal 140 must be moved inwards. However, considering the convenience of assembly, a recessed assembly space is provided outside the output front housing 120 to place the bearing 130 and the oil seal 140, and the bearing 130 and the oil seal 140 are changed to be external.

The assembly space includes a first space 121 and a second space. The transmission flange 160 is assembled in the first space 121, and the bearing 130 and the oil seal 140 are assembled in the second space.

In order to ensure the position of the bearing 130 and the oil seal 140, a lock nut 150 is also included. The lock nut 150 is threadedly connected to the front housing 120 and divides the assembly space into a first space 121 and a second space. The first space 121 is located Outside the locking nut 150 , the second space is located inside the locking nut 150 . The main body shaft 110 is installed on the front housing 120 through the bearing 130 . The front end of the main body shaft 110 passes through the lock nut 150 and extends into the first space 121 .

Specifically, external threads are provided along the outer circumference of the lock nut 150, and corresponding internal threads are provided in the front housing 120. The lock nut 150 is connected to the front housing 120 through the external threads on its outer periphery. The locking nut 150 is provided with a through hole 151 for the main body shaft 110 to pass through. The front end of the main body shaft 110 passes through the through hole 151 and extends into the first space 121. In the first space 121, it communicates with the embedded transmission. Flange 160 connection.

In order to assemble the main body shaft 110 on the front housing 120, there is an assembly section 111 on the main body shaft 110, and a shoulder 112 is provided at the rear end of the assembly section 111; the bearing 130 is installed on the front housing 120 and is located on the lock. In the second space inside the lock nut 150, the assembly section 111 is limited by the shoulder 112 and mounted on the bearing 130. The bearing 130 is limited by the lock nut 150, so that the main shaft 110 is rotationally mounted on the front housing 120.

The locking nut 150 threadedly connected in the front housing 120 and the end surface of the front housing 120 respectively limit the front and rear sides of the bearing 130 to prevent the main body shaft 110 from axial movement.

The oil seal 140 is provided between the lock nut 150 and the bearing 130 . Specifically, there is an accommodating space inside the lock nut 150 , and the oil seal 140 is sleeved on the assembly section 111 and located in the accommodating space, forming a sealed sliding connection with the main shaft 110 .

The inner diameter of the through hole 151 of the lock nut 150 is larger than the outer diameter of the assembly section 111 , the outer diameter of the front end of the main shaft 110 is smaller than the outer diameter of the assembly section 111 , and the front end of the main shaft 110 passes through the through hole 151 of the lock nut 150 , and is located in the first space 121 to facilitate connection with the transmission shaft 180 .

The front end of the main shaft 110 does not exceed the front end of the front housing 120, so that the front end of the main shaft 110 is kept in the first space 121, which not only facilitates connection with the transmission shaft 180, but also avoids protruding outside the front housing 120 and affecting the power unit. Overall dimensions.

Referring to Figure 4, the transmission flange 160 can be detachably connected to the main body shaft 110 using a conventional connection method, and rotates with the main body shaft 110. The connection methods include but are not limited to spline connection, key connection, profile connection or pin. Connection etc.

In one embodiment, the transmission flange 160 is splined to the body shaft 110 . The front end of the main shaft 110 is provided with external splines, and the inner hole of the transmission flange 160 is provided with internal splines. The transmission flange 160 is embedded in the first space and sleeved on the main shaft 110. The two pass through the inner hole. , external spline connection; a threaded hole 113 is provided along the front end of the main shaft 110 in the axial direction, and a locking bolt 170 passes through the inner hole of the transmission flange 160 and is threadedly connected in the threaded hole 113; through splines and locks Tighten the bolt 170 to fix the transmission flange 160 on the front end of the main body shaft 110 and rotate with the main body shaft 110 .

In another embodiment, the transmission flange 160 and the main body shaft 110 are connected through a key, and the two are connected and fixed axially through a locking bolt 170 .

In another embodiment, the transmission flange 160 and the main body shaft 110 are processed with mating profiles, and the transmission flange 160 and the main body shaft 110 are connected to each other to prevent rotation through the mating profiles. Then connect and fix through locking bolt 170.

In another embodiment, the body shaft 110 fits within the drive flange 160 and the two are connected by radially inserted pins.

In order to realize the connection between the transmission flange 160 and the transmission shaft 180, studs 161 extending toward the transmission shaft 180 are provided along the circumference of the transmission flange 160. The fixed end 181 of the transmission shaft 180 has a fixing hole 182 that matches the stud 161. The stud 161 passes through the fixing hole 182 and is locked and fixed by a nut.

In this embodiment, three studs 161 extending in the direction of the drive shaft 180 are spaced along the circumferential direction of the transmission flange 160. The three studs 161 are evenly distributed, and the ends of the three studs 161 all extend out of the assembly space. It is convenient to connect with the drive shaft 180. The fixed end 181 of the transmission shaft 180 is a disc-shaped structure that cooperates with the transmission flange 160. A fixed hole 182 that cooperates with the stud 161 is provided along the circumferential direction of the fixed end 181 of the transmission shaft 180. The fixed end 181 is embedded in the first space 121. , so that the studs 161 on the transmission flange 160 pass through the corresponding fixing holes 182 respectively, and are locked and fixed by the nuts, thereby realizing the connection and fixation between the transmission shaft 180 and the transmission flange 160 .

In order to adapt to different working machines, the shaft extension end of the transmission shaft 180 is provided with external threads, keyways, threaded holes, splines or tapered surfaces. The structure, shape and size of the shaft extension end of the transmission shaft 180 can be set according to the working machine. This application does not limit this. In addition to the shaft extension end structure mentioned above, the shaft extension end of the transmission shaft 180 can also be set to Other structures or shapes.

As shown in Figure 5, the shaft extension end of the transmission shaft 180 is provided with external threads; as shown in Figure 6, the shaft extension end of the transmission shaft 180 is provided with a keyway, and a threaded hole with an internal thread is provided axially along the shaft extension end. ; As shown in Figure 7, the shaft extension end of the transmission shaft 180 is connected to the pulley through the keyway.

The fixed end 181 of the transmission shaft 180 is provided with an escape recess recessed toward the shaft extension end to avoid the locking bolt 170; the head of the locking bolt 170 is located in the escape recess.

In the above embodiment, the indirect connection method of the main body shaft and the transmission shaft is described in detail. In addition, the main body shaft and the transmission shaft can also be directly connected. The direct connection method will be exemplified below.

Referring to Figures 8 to 10, the present application provides a split connection structure for a universal power unit output shaft, including a front housing 220 and an output shaft rotatably installed in the front housing 220. The output shaft includes a split body shaft. 210 and the transmission shaft 260 have an assembly space at the front end of the front housing 220. The main shaft 210 is rotatably installed in the front housing 220, and its front end extends into the assembly space. The transmission shaft 260 is detachably connected to the main shaft 210. The front end and its shaft extension end extend out of the front housing 220 .

In this application, the output shaft is arranged separately, including the main shaft 210 that is rotatably installed in the front housing 220 and the transmission shaft 260 that is detachably connected to the main shaft 210; on the one hand, when different working machines need to be mounted, only If you need to replace the transmission shaft 260, you can change the structural shape of the shaft extension end of the output shaft to adapt to different working machines. There is no need to replace the entire output shaft. The replacement is simpler and more convenient, and the versatility is better; on the other hand, in During packaging, transportation and storage, since the transmission shaft 260 can be detached, the size of the main body of the power unit can be reduced, thereby reducing the size of the packaging box, making packaging, transportation and storage more convenient, and the removed transmission shaft 260 can be Separate storage can better prevent the drive shaft 260 from being damaged by rust, scratches, etc.

In order to ensure the versatility of the universal power unit, it is necessary to ensure that the overall dimensions do not change on the basis of increasing the structure. It is necessary to ensure that the assembly surface of the transmission shaft 260 is flush with the front housing 220, so the output shaft output end bearing 230 and the oil seal The 240 position must be moved inward. However, considering the convenience of assembly, a recessed assembly space is provided outside the front output housing 220 to place the bearing 230 and the oil seal 240, and the bearing 230 and the oil seal 240 are changed to be external.

The assembly space includes a first space 221 and a second space. The transmission shaft 260 is detachably connected to the main body shaft 210 in the first space 221. The bearing 230 and the oil seal 240 are assembled in the second space.

In order to ensure the position of the bearing 230 and the oil seal 240, a locking nut 250 is also included. The locking nut 250 is threadedly connected to the front housing 220 and divides the assembly space into a first space 221 and a second space. The first space 221 is located Outside the locking nut 250 , the second space is located inside the locking nut 250 . The main body shaft 210 is installed on the front housing 220 through the bearing 230 . The front end of the main body shaft 210 passes through the lock nut 250 and extends into the first space 221 .

Specifically, external threads are provided along the outer periphery of the locking nut 250, and corresponding internal threads are provided in the front housing 220. The locking nut 250 is connected to the front housing 220 through the external threads on its outer periphery. The lock nut 250 is provided with a through hole 251 for the main body shaft 210 to pass through. The front end of the main body shaft 210 passes through the through hole 251 and extends into the first space 221. In the first space 221, it is connected with the embedded The fixed end 261 of the transmission shaft 260 is detachably connected.

In order to assemble the main body shaft 210 on the front housing 220, there is an assembly section 211 on the main body shaft 210, and a shoulder 212 is provided at the rear end of the assembly section 211; the bearing 230 is installed on the front housing 220 and is located on the lock. In the second space inside the lock nut 250, the assembly section 211 is limited by the shoulder 212 and mounted on the bearing 230. The bearing 230 is limited by the lock nut 250, so that the main shaft 210 is rotationally mounted on the front housing 220.

The locking nut 250 threadedly connected to the front housing 220 and the end surface of the front housing 220 respectively limit the front and rear sides of the bearing 230 to prevent the main body shaft 210 from axial movement.

The oil seal 240 is provided between the lock nut 250 and the bearing 230 . Specifically, there is an accommodating space inside the lock nut 250, and the oil seal 240 is sleeved on the assembly section 211 and located in the accommodating space, forming a sealed sliding connection with the main shaft 210.

The inner diameter of the through hole 251 of the lock nut 250 is larger than the outer diameter of the assembly section 211. The outer diameter of the front end of the main shaft 210 is smaller than the outer diameter of the assembly section 211. The front end of the main shaft 210 passes through the through hole 251 of the lock nut 250. , and is located in the first space 221 to facilitate connection with the transmission shaft 260 .

The front end of the main shaft 210 does not exceed the front end of the front housing 220, so that the front end of the main shaft 210 is kept in the first space 221, which not only facilitates connection with the transmission shaft 260, but also avoids protruding outside the front housing 220 and affecting the power unit. Overall dimensions.

The outer diameter of the fixed end 261 of the transmission shaft 260 is larger than the outer diameter of the shaft extension end. By processing a connection structure on the fixed end 261 of the transmission shaft 260 that matches the front end of the main shaft 210, the transmission shaft 260 can be directly connected to the main shaft 210. 210 is detachably connected, the connection structure is simpler, and the overall size of the transmission shaft 260 can be further shortened, making the entire machine more compact.

The transmission shaft 260 can be detachably connected to the main shaft 210 using a conventional connection method, and rotates with the main shaft 210. The connection methods include but are not limited to spline connection, key connection, profile connection or pin connection.

In one embodiment, an external spline is provided at the front end of the main shaft 210, a fixing hole 262 is provided along the fixed end 261 of the transmission shaft 260, and an internal spline is provided in the fixed hole 262. The fixed end of the transmission shaft 260 261 is embedded in the assembly space and sleeved on the main body shaft 210, and the two are connected through internal and external splines.

In order to limit the axial freedom of the transmission shaft 260 along the main body shaft 210, a threaded hole 213 is provided along the axial direction of the front end of the main body shaft 210, and a through hole 263 is provided along the axial direction of the transmission shaft 260. The through hole 263 may be a light hole. , or an internal thread corresponding to the threaded hole 213 can be processed in the through hole 263, and a locking bolt 270 passes through the through hole 263 and is threadedly connected in the threaded hole 213; through the spline and the locking bolt 270, the transmission shaft 260 is fixed on the front end of the main body shaft 210 and rotates with the main body shaft 210 .

In another embodiment, the transmission shaft 260 and the main body shaft 210 are connected through a key, and the two are axially connected and fixed through a locking bolt 270.

In another embodiment, the transmission shaft 260 and the main body shaft 210 are processed with mating profiles. The transmission shaft 260 and the main body shaft 210 are connected through the mating profiles to prevent rotation, and the two are axially connected through the lock. Tighten bolt 270 to connect and fix.

In another embodiment, body shaft 210 fits within drive shaft 260 and the two are connected by radially inserted pins.

Referring to Figures 11 and 12, in order to adapt to different working machines, the extension end of the transmission shaft 260 is provided with a keyway or a tapered surface. The structure, shape and size of the shaft extension end of the transmission shaft 260 can be set according to the working machine. This application does not limit this. In addition to the shaft extension end structure mentioned above, the shaft extension end of the transmission shaft 260 can also be set to Other structures or shapes.

As shown in Figure 13, the extension end of the transmission shaft 260 is provided with a keyway, and through holes 263 are provided along the axial direction of the transmission shaft 260 through both ends of the transmission shaft 260. The pulley is sleeved on the extension end of the transmission shaft 260 and connected with the transmission shaft. The shaft 260 is connected by a key, and the locking bolt 270 passes through the through hole 263 and the fixing hole 262 and is threadedly connected in the threaded hole 213 of the main shaft 210. The head of the locking bolt 270 is provided with a gasket or nut to limit the outside of the pulley. Bit.

As shown in Figure 14, the extension end of the transmission shaft 260 is provided with a tapered surface, and along the axial direction of the transmission shaft 260, through holes 263 are provided through both ends of the transmission shaft 260. The inner hole of the pulley is a corresponding tapered surface, and the pulley is sleeved on the transmission The extension end of the shaft 260 is connected with the conical surface of the transmission shaft 260. The locking bolt 270 passes through the through hole 263 and the fixing hole 262, and is threadedly connected in the threaded hole 213 of the main shaft 210. The head of the locking bolt 270 There are washers or nuts to limit the outside of the pulley.

In this application, unless otherwise clearly stated and limited, the terms "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integrated ; It can be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present invention, numerous specific details are described. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail so as not to obscure the understanding of this description.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , systems, materials, or features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. scope, they should be covered by the claims and the scope of the description of the present invention.

Claims

A universal power unit output shaft split connection structure, including a front housing and an output shaft rotatably installed in the front housing. It is characterized in that the output shaft includes a main body shaft and a transmission shaft that are separately arranged. The front end of the front housing has an assembly space, the main body shaft is rotatably installed in the front housing, and its front end extends into the assembly space, and the transmission shaft is directly or indirectly detachably connected to the main body shaft. The front end of the transmission shaft extends out of the front housing.
The universal power unit output shaft split connection structure according to claim 1, characterized in that:

In the case where the transmission shaft is indirectly detachably connected to the front end of the main body shaft, the split connection mechanism further includes a transmission flange, and the transmission flange is detachably connected to the front end of the main body shaft. , and the transmission shaft is detachably connected to the transmission flange,

In the case where the transmission shaft is directly detachably connected to the front end of the main body shaft, the transmission shaft is detachably connected to the front end of the main body shaft.
The universal power unit output shaft split connection structure according to claim 2, further comprising a locking nut threadedly connected to the front housing to divide the assembly space into first space and a second space, the first space is located outside the lock nut, the second space is located inside the lock nut, the main body shaft is installed on the front housing through a bearing, The front end passes through the locking nut and extends into the first space.
The universal power unit output shaft split connection structure according to claim 3, characterized in that the main body shaft has an assembly section with a shoulder at the rear end of the assembly section, and the assembly section is installed on the On the bearing, the bearing is installed on the front housing and is located in the second space inside the lock nut. The main body shaft is limited by the shoulder. The bearing is composed of the front housing and the lock nut. Limit.
The universal power unit output shaft split connection structure according to claim 4, further comprising an oil seal, the inside of the lock nut has an accommodation space, the oil seal is sleeved on the assembly section, and located within the accommodation space.
The universal power unit output shaft split connection structure according to claim 4, wherein the lock nut is provided with a through hole for the main body shaft to pass through, and the inner diameter of the through hole is larger than the assembly section. the outer diameter.
The universal power unit output shaft split connection structure according to claim 4, characterized in that when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, the transmission flange is embedded in the In the first space, it is detachably connected to the main body shaft and rotates with the main body shaft.
The universal power unit output shaft split connection structure according to claim 7, characterized in that the transmission flange and the main body shaft are connected through spline connection, key connection, profile connection or pin connection.
The universal power unit output shaft split connection structure according to claim 2, characterized in that when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, the transmission flange is circumferentially provided with There is a stud extending toward the transmission shaft. The fixed end of the transmission shaft has a fixing hole that matches the stud. The stud passes through the fixing hole and is locked and fixed by a nut.
The universal power unit output shaft split connection structure according to claim 2, characterized in that when the transmission shaft is indirectly and detachably connected to the front end of the main body shaft, along the front end of the main body shaft A threaded hole is provided in the direction, and a locking bolt passes through the inner hole of the flange and is threadedly connected in the threaded hole. The fixed end of the transmission shaft is provided with a recess toward its shaft extension end to avoid any obstructions. The above mentioned locking bolt avoidance recess.
The universal power unit output shaft split connection structure according to claim 4, wherein when the transmission shaft is directly and detachably connected to the front end of the main body shaft, the fixed end of the transmission shaft extends into the first space and detachably connected with the front end of the main body shaft.
The universal power unit output shaft split connection structure according to claim 11, characterized in that the transmission shaft and the main body shaft are connected through spline connection, key connection, profile connection or pin connection.
The universal power unit output shaft split connection structure according to claim 11, characterized in that when the transmission shaft is directly and detachably connected to the front end of the main body shaft, along the front end of the main body shaft A threaded hole is provided in the direction, and a through hole is provided through both ends of the transmission shaft along the axial direction of the transmission shaft. A locking bolt passes through the through hole of the transmission shaft and is threadedly connected in the threaded hole.
The universal power unit output shaft split connection structure according to claim 1, characterized in that the shaft extension end of the transmission shaft is provided with external threads, keyways, threaded holes, splines or tapered surfaces.