WO2021110151A1

WO2021110151A1 - Multi-row floating combined type heavy load overrunning clutch

Info

Publication number: WO2021110151A1
Application number: PCT/CN2020/134041
Authority: WO
Inventors: 薛荣生; 张引航; 陈俊杰; 王靖; 陈同浩; 谭志康; 邓天仪; 邓云帆; 梁品权; 颜昌权
Original assignee: 西南大学
Priority date: 2019-12-04
Filing date: 2020-12-04
Publication date: 2021-06-10
Also published as: CN111059169B; CN111059169A

Abstract

A multi-row floating combined type heavy load overrunning clutch comprising an inner center wheel cam sleeve (7), an outer ring (6a) and at least two inner center wheels (6c) arranged between the inner center wheel cam sleeve (7) and the outer ring (6a) side by side, wherein rolling bodies (6d, 6e) are arranged between the outer ring (6a) and the inner center wheels (6c) respectively, outer teeth (6c1) on the peripheries of the inner center wheels (6c) directly are opposite in a one-to-one correspondence manner, and the rolling bodies (6d, 6e) around the adjacent inner center wheels (6c) are arranged directly opposite in a one-to-one correspondence manner. The structure is novel, the design is ingenious, the number of inner center wheels (6c) and the corresponding rolling bodies (6d, 6e) can be infinitely increased according to actual needs, due to the fact that the inner center wheels (6c) and the rolling bodies (6d, 6e) are short in length, stress is uniform, reliability is high in the usage process, the situation that the rolling bodies (6d, 6e) are broken is avoided, while production machining precision requirements are low, manufacturing is easy, the cost is low, and assembly is simple, such that the heavy load overrunning clutch which is extremely high in reliability and can bear a super-large load can be manufactured at relatively low production cost.

Description

Multi-row floating combined heavy-duty overrunning clutch

Technical field

The invention relates to the technical field of overrunning clutch devices, in particular to a multi-row floating combined heavy-load overrunning clutch.

Background technique

The overrunning clutch is an important component used for power transmission and separation between the prime mover and the working machine or between the driving shaft and the driven shaft inside the machine. It is a device with self-clutching function by using the speed change or rotation direction change of the main and driven parts.

The traditional roller-type overrunning clutch is made of one material. In order to take into account the torsion resistance and wear resistance, it can only be comprehensively selected in a compromise. Generally, it cannot meet the extreme use scenarios of heavy load and large torque. In order to be suitable for application scenarios with large loads, the existing roller-type overrunning clutches can only withstand larger loads by extending the outer ring, inner wheel and rolling elements (rollers). However, the inner wheel and rolling elements cannot be extended indefinitely, especially the thinnest roller. If it is too long, not only will it be prone to uneven force, it may cause breakage, and the machining accuracy is difficult to guarantee, and it is prone to poor meshing. , Resulting in huge production difficulty, low yield rate, high requirements for materials, and high production costs. Those skilled in the art usually only have a technical background in a single subject, and do not have comprehensive capabilities in materials, structures, and processes. Therefore, there is no overrunning clutch that can use the existing conventional materials without greatly increasing the cost. It can meet the application scenarios of super load.

Therefore, there is an urgent need to design an overrunning clutch that achieves both structural and functional breakthroughs. It is easy to manufacture, low cost, easy to assemble, able to withstand large loads, and has a wide range of applications.

Summary of the invention

In order to solve the technical problems of insufficient reliability of the existing roller-type heavy-duty overrunning clutch, short service life, difficult to guarantee machining accuracy, and prone to poor meshing, resulting in huge production difficulties, low yields, and high production costs. The invention provides a multi-row floating combined heavy-load overrunning clutch.

The technical scheme is as follows:

A multi-row floating combined heavy-duty overrunning clutch, its main points are, including:

At least two inner wheels arranged side by side, and the outer teeth provided on the outer circumference of each inner wheel are directly opposite to each other; and

The outer ring is sleeved on the outside of each inner core wheel, and rolling bodies are respectively arranged between the outer ring and each inner core wheel, and the rolling bodies around the adjacent inner core wheels are directly opposed to each other.

With the above structure, the number of inner wheels and corresponding rolling elements can be freely selected according to actual needs, or even increased indefinitely, which doubles the load bearing capacity of the overrunning clutch and breaks through the load-bearing limit of the traditional overrunning clutch; due to the inner wheel and rolling The length of the body is short, the force is uniform, the reliability is high during use, and it is difficult to break the rolling elements. At the same time, it has low requirements for production and processing accuracy, easy manufacturing, simple assembly, and low material requirements. However, the manufacturing cost is relatively low, so that a heavy-duty overrunning clutch with extremely high reliability and capable of withstanding a large load can be manufactured at a low production cost.

Preferably, the inner wheels arranged side by side are sleeved on the same inner wheel cam sleeve, the inner wheel cam sleeve is made of high-strength torsion-resistant material, and the inner wheel is made of pressure-resistant and wear-resistant material. By adopting the above scheme, the inner wheel cam sleeve has high torsion resistance, which can ensure the reliability and stability of transmission, and the inner wheel has strong wear resistance and pressure resistance, which can delay the wear speed and ensure the reliable cooperation with the rolling elements. The wheel cam sleeve and the inner wheel are made of two different materials, which can make full use of the material characteristics, which not only effectively saves production costs, but also greatly extends the service life of the overrunning clutch and improves the performance of the overrunning clutch.

Preferably, the material of the cam sleeve of the inner wheel is alloy steel, and the material of the inner wheel is bearing steel or alloy steel or cemented carbide. With the above scheme, free choices can be made according to specific needs, and the adaptability is strong.

As a preference: the rolling bodies distributed along the outer circumference of each inner wheel are composed of alternately arranged thick rolling bodies and thin rolling bodies, and two opposite cages are provided on the outer circumferential surface of each inner wheel, and each The inner wall of the cage is provided with a ring of annular grooves, and both ends of each thin rolling body can be slidably inserted into the corresponding annular grooves. With the above structure, the thick rolling elements play the role of meshing, and the small rolling elements play the role of sorting, so that each thin rolling element can follow-up, which improves the reliability of the overrunning clutch and increases the service life; at the same time, the The thick rolling elements and the thin rolling elements are independent of each other, follow each other, do not interfere with each other, and are self-adaptive, which further improves the overall reliability.

Preferably, outer ring brackets are installed on both sides of the outer ring, and each outer ring bracket is sleeved on the cam sleeve of the inner wheel through a corresponding mounting bearing. With the above structure, the positioning outer ring, inner wheel, cage and rolling elements can be reliably installed.

Preferably, the outer wall of the outer ring has input driven teeth arranged along the circumferential direction. With the above structure, power transmission can be reliably realized.

Preferably, the outer wall of the cam sleeve of the inner center wheel is spline-fitted with the inner wall of each inner center wheel. The power transmission can be reliably realized.

Preferably, the number of internal spline teeth of the inner core wheel is twice the number of external teeth. The above structure is adopted to facilitate installation and debugging, so as to solve the problem of non-synchronization of each inner chakra.

Preferably, the external tooth includes a top arc section and a short side section and a long side section respectively located on both sides of the top arc section, the short side section is an inwardly concave arc structure, and the long side section is outward In the convex arc structure, the curvature of the short side section is smaller than the curvature of the long side section. With the above structure, the stability and reliability of the one-way transmission function can be ensured.

Preferably, the end surface of one end of the cam sleeve of the inner core wheel has a cam profile structure. With the above structure, the cam pair can be matched with the adjacent components, thereby realizing power transmission. With the above structure, the cam pair can be matched with the adjacent components, thereby realizing power transmission.

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

The multi-row floating combined heavy-duty overrunning clutch adopting the above technical scheme has novel structure and ingenious design. The number of inner wheels and corresponding rolling elements can be freely selected according to actual needs, or even increased indefinitely, which doubles the load of the overrunning clutch. The ability to break through the load-bearing limit of the traditional overrunning clutch; due to the short length of the inner wheel and rolling elements, uniform force, high reliability during use, it is difficult to break the rolling elements, and at the same time, the accuracy of production and processing Low requirements, easy manufacturing, simple assembly, low material requirements, ordinary bearing steel can be used, and the manufacturing cost is relatively low, so that a heavy-duty overrunning clutch with extremely high reliability and capable of withstanding large loads can be manufactured at a low production cost.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a schematic diagram of the matching relationship between the outer ring, the inner wheel and the rolling elements;

Figure 3 is a schematic diagram of the structure of the cage;

Figure 4 is a schematic diagram of the structure of the outer ring bracket.

Detailed ways

The present invention will be further described below in conjunction with the embodiments and the drawings.

As shown in Figures 1 and 2, a multi-row floating combined heavy-duty overrunning clutch mainly includes an inner cam sleeve 7, an outer ring 6a, and at least two arranged side by side between the inner cam sleeve 7 and the outer ring 6a. Rolling bodies are arranged between the outer ring 6a and each inner ring 6c. It should be pointed out that the outer teeth 6c1 on the outer circumference of each inner ring 6c are directly opposite each other, and the rolling elements around the adjacent inner ring 6c The bodies are facing one by one, so as to ensure the synchronization of the inner chakras 6c.

The inner cam sleeve 7 is made of high-strength torsion resistant material, and the inner wheel 6c is made of compressive and wear-resistant material. Specifically, the inner cam sleeve 7 is made of alloy steel. The material of the wheel 6c is bearing steel or alloy steel or cemented carbide. In this embodiment, the material of the inner wheel cam sleeve 7 is preferably 20CrMnTi, which has strong torsion resistance, low cost, and high cost performance. The material of the inner wheel 6c preferably adopts GCr15, which has good wear resistance and compression performance, and is relatively cost-effective. Low and cost-effective. The inner wheel cam sleeve 7 has high torsion and compression resistance, which can ensure the reliability and stability of the transmission. The inner wheel 6c has strong wear resistance and compression resistance. Therefore, the inner wheel cam sleeve 7 and the inner wheel 6c are made of two different materials. Manufacturing not only effectively saves production costs, but also greatly extends the service life of the multi-row floating combined heavy-load overrunning clutch.

Referring to Figures 1 to 3, the rolling bodies distributed along the outer circumference of each inner wheel 6c are composed of alternately arranged thick rolling bodies 6d and thin rolling bodies 6e, and two inner wheels 6c are provided on the outer circumferential surface of each rolling body. Each cage 6f has a ring of annular grooves 6f1 on the inner wall of each cage 6f, and both ends of each thin rolling body 6e can be slidably inserted into the corresponding annular grooves 6f1. With the above structure, each thin rolling element 6e can follow-up, which improves the overall stability and reliability, and increases the service life.

1 and 4, outer ring brackets 28 are installed on both sides of the outer ring 6a, and each outer ring bracket 28 is sleeved on the inner cam sleeve 7 through a corresponding mounting bearing 29, respectively. Specifically, the outer ring bracket 28 includes a bearing support portion 28a, a cage support portion 28b, and an outer ring connection portion 28c from the inside to the outside. The outer edge of the bearing support portion 28a is bent radially inward to form a bearing positioning portion 28d, which can reliably position and install the bearing 29. Between the cage support portion 28b and the outer ring connecting portion 28c there is a support protrusion 28e extending in the direction close to the outer ring 6a, the outer ring 6a can be supported on the support protrusion 28e, and the outer ring 6a The role of positioning. A bolt connection hole 28f is opened on the outer ring connecting portion 28c, so that the outer ring connecting portion 28c can be fixedly connected to the outer ring 6a by bolts.

Referring to FIG. 1, the outer wall of the outer ring 6a has input driven teeth 6b arranged in the circumferential direction. The outer wall of the inner wheel cam sleeve 7 is spline-fitted with the inner wall of each inner wheel 6c. With the above structure, power transmission can be reliably performed.

Referring to Fig. 2, the number of teeth of the inner spline of the inner wheel 6c is twice the number of teeth of the outer tooth 6c1. It is easy to install and debug to solve the problem of non-synchronization of each inner chakra.

The outer tooth 6c1 includes a top arc section 6c12, and a short side section 6c11 and a long side section 6c13 respectively located on both sides of the top arc section 6c12. The short side section 6c11 is an inwardly concave arc structure, and the long side section 6c13 is an arc-shaped structure protruding outward, and the curvature of the short side section 6c11 is smaller than the curvature of the long side section 6c13. With the above structure, the stability and reliability of the one-way transmission function can be ensured.

Please refer to FIG. 1, one end surface of the inner cam sleeve 7 has a cam profile structure, so that the cam pair can be matched with adjacent components, thereby realizing power transmission.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the enlightenment of the present invention, those skilled in the art can make a variety of similar methods without violating the purpose and claims of the present invention. It means that all such transformations fall within the protection scope of the present invention.

Claims

A multi-row floating combined heavy-duty overrunning clutch is characterized in that it comprises:

At least two inner wheels (6c) arranged side by side, and the outer teeth (6c1) arranged on the outer circumference of each inner wheel (6c) are directly opposite; and

The outer ring (6a) is sleeved on the outside of each inner wheel (6c). Rolling bodies are arranged between the outer ring (6a) and each inner wheel (6c), and the rolling bodies around the adjacent inner wheel (6c) Right one by one.
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, characterized in that: the inner wheel (6c) arranged side by side is sleeved on the same inner wheel cam sleeve (7), and the inner wheel cam sleeve (7) ) Is made of high-strength torsion resistant material, and the inner wheel (6c) is made of compressive and wear-resistant material.
The multi-row floating combined heavy-duty overrunning clutch according to claim 2, characterized in that: the material of the inner wheel cam sleeve (7) is alloy steel, and the material of the inner wheel (6c) is bearing steel or alloy Steel or cemented carbide.
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, characterized in that the rolling bodies distributed along the outer circumference of each inner wheel (6c) consist of alternately arranged thick rolling bodies (6d) and thin rolling bodies ( 6e) composition, two opposite cages (6f) are provided on the outer peripheral surface of each of the inner wheels (6c), and a ring of annular grooves (6f1) are provided on the inner wall of each cage (6f) , Both ends of each thin rolling element (6e) can be slidably inserted into the corresponding annular groove (6f1).
The multi-row floating combined heavy-duty overrunning clutch according to claim 4, characterized in that: outer ring brackets (28) are installed on both sides of the outer ring (6a), and each outer ring bracket (28) is respectively The corresponding mounting bearing (29) is sleeved on the inner cam sleeve (7).
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, wherein the outer wall of the outer ring (6a) has input driven teeth (6b) arranged in the circumferential direction.
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, characterized in that: the outer wall of the inner cam sleeve (7) of the inner core wheel (7) is spline-fitted with the inner wall of each inner wheel (6c).
The multi-row floating combined heavy-duty overrunning clutch according to claim 7, characterized in that: the number of teeth of the inner spline of the inner wheel (6c) is twice the number of teeth of the outer teeth (6c1).
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, characterized in that: the external teeth (6c1) include a top arc section (6c12) and short side sections respectively located on both sides of the top arc section (6c12) (6c11) and the long side section (6c13), the short side section (6c11) is an inwardly concave arc structure, the long side section (6c13) is an outwardly convex arc structure, the short side The curvature of the segment (6c11) is smaller than the curvature of the long side segment (6c13).
The multi-row floating combined heavy-duty overrunning clutch according to claim 1, characterized in that: one end surface of the inner cam sleeve (7) has a cam profile structure.