Flexible motor connecting shaft

Abstract

The utility model belongs to the technical field of flexible shafts, and particularly relates to a flexible motor connecting shaft which comprises two connecting parts, an elastic piece is arranged between the two connecting parts, and the two connecting parts are in central symmetry relative to the elastic piece. The elastic piece comprises a rubber piece and a spring assembly, and a first bolt used for fixing is screwed in a screw hole formed in the connecting position of the spring assembly and the connecting part. According to the motor connecting shaft, the elastic piece is arranged between the two connecting parts, and the elastic piece is composed of the rubber piece and the spring assembly, so that the rubber piece and the spring assembly are matched to increase the elasticity of the motor connecting shaft, and the problem that the elasticity is insufficient when only rubber is adopted as the elastic piece for resetting is solved; and the problem that when only the spring is adopted as the elastic piece, plastic deformation is likely to occur due to overlarge deformation quantity is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flexible shafts, and in particular relates to a flexible motor connecting shaft. Background Art

[0002] Flexible motor couplings are primarily used to connect two shafts, enabling them to rotate together and transmit torque. Compared to traditional rigid couplings, flexible couplings offer the following significant advantages: 1. Elasticity: Due to the presence of an intermediate elastic element, flexible couplings can compensate for axis misalignment between the two shafts within a certain range, including radial, axial, and angular misalignment. 2. Cushioning and shock absorption: When the transmission system is subjected to shock or vibration, the elastic element acts as a buffer, reducing the impact of vibration on the system.

[0003] Traditional flexible motor connecting shafts often use rubber or springs as the elastic parts of the flexible motor connecting shaft. However, when using rubber as the elastic part, the elastic force is insufficient during reset, and when using springs as the elastic part, plastic deformation problems may occur due to excessive deformation.

[0004] Based on this, a flexible motor connecting shaft composed of rubber parts and spring components is designed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present invention provides a flexible motor connecting shaft. The specific technical solution is as follows:

[0006] A flexible motor connecting shaft comprises two connecting parts, an elastic member is arranged between the two connecting parts, and the two connecting parts are centrally symmetrical about the elastic member;

[0007] The elastic member includes a rubber member and a spring assembly. The rubber member is sleeved on the outside of the spring assembly. A screw hole is provided at the connection between the spring assembly and the connecting portion, and a first bolt for fixing is screwed in the screw hole.

[0008] Preferably, the connecting part includes an outer sleeve and three baffles integrally formed at the end of the outer sleeve, an inner sleeve is integrally formed inside the outer sleeve near one end of the baffle, a limiting groove is provided on the inner surface of the inner sleeve, the rubber part is installed between the baffles of the two connecting parts, and the two ends of the spring assembly are fixed in the inner sleeve by a first bolt.

[0009] Preferably, the rubber part includes a rubber strip and a connecting plate, and the connecting plate is integrally formed between two adjacent rubber strips. There are six rubber strips and six connecting plates. The baffles at the ends of the two connecting parts are staggered to form six cavities, and the six rubber strips are located in the six cavities. The connecting plate is located at the end of the baffle.

[0010] Preferably, the spring assembly includes two symmetrically arranged baffles, a first spring and a second spring are welded between the two baffles, the second spring is sleeved on the outside of the first spring, a hexagonal prism is welded on the outer surface of the baffle, and the hexagonal prism is installed in the limiting groove, and the first bolt is screwed into the screw holes opened on the surface of the inner sleeve, the baffle and the hexagonal prism.

[0011] Preferably, the first spring and the second spring rotate in opposite directions.

[0012] Preferably, a shaft is sleeved in the outer sleeve, an inner hexagonal hole is provided at the end of the shaft, and the inner hexagonal hole is sleeved on the outside of the inner sleeve, and a second bolt is screwed into the screw holes provided in the surfaces of the outer sleeve and the shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. An elastic member is provided between the two connecting parts, and the elastic member is composed of a rubber member and a spring assembly. The rubber member and the spring assembly cooperate to increase the elasticity of the motor connecting shaft, thereby solving the problem of insufficient elastic force when only rubber is used as the elastic member for reset, and also solving the problem of plastic deformation caused by excessive deformation when only springs are used as the elastic member.

[0015] 2. Through the connecting part composed of the outer sleeve, the baffle, the inner sleeve and the limiting groove, the rubber part is installed between the baffles of the two connecting parts, and the two ends of the spring assembly are fixed in the inner sleeve by the first bolt, thereby facilitating the installation of the elastic part between the two connecting parts and increasing the stability of the installation of the elastic part.

[0016] 3. The rubber piece is composed of a rubber strip and a connecting plate, and there are six rubber strips and six connecting plates. The connecting plate is integrally formed between two rubber strips, and the six connecting plates are staggered, which makes it easy for the rubber strip to be installed in the cavity between the six baffles. The staggered connecting plates are located at the end of the baffle, which increases the stability of the rubber piece installed between the two connecting parts.

[0017] 4. A spring assembly consisting of a baffle, a first spring, a second spring and a hexagonal prism is provided, and the first spring and the second spring are welded between the two baffles. At the same time, the rotation directions of the first spring and the second spring are arranged so that the first spring and the second spring cooperate to provide elastic force for the spring assembly. The hexagonal prism welded on the outside of the baffle is installed in the limit groove, and the first bolt is screwed into the holes opened on the surface of the inner sleeve, the baffle and the hexagonal prism, so that the two ends of the spring assembly are fixed in the inner sleeve by the first bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the parts structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the connecting portion structure in the present utility model;

[0022] Figure 5 This is a schematic diagram of the rubber component structure in the present utility model;

[0023] Figure 6 This is a schematic diagram of the spring assembly structure in the present utility model.

[0024] Figure numerals: 1. Connecting part; 11. Outer sleeve; 12. Baffle; 13. Inner sleeve; 14. Limiting groove; 2. Rubber part; 21. Rubber strip; 22. Connecting plate; 3. Spring assembly; 31. Baffle; 32. First spring; 33. Second spring; 34. Hexagonal prism; 4. First bolt; 5. Shaft; 6. Hexagonal socket; 7. Second bolt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present utility model are described below.

[0026] See also Figure 1-6 The utility model provides a technical solution: a flexible motor connecting shaft, comprising a connecting portion 1, two connecting portions 1 are provided, an elastic member is provided between the two connecting portions 1, and the two connecting portions 1 are centrally symmetrical about the elastic member;

[0027] The elastic member includes a rubber member 2 and a spring assembly 3. The rubber member 2 is sleeved on the outside of the spring assembly 3. A screw hole is provided at the connection between the spring assembly 3 and the connecting part 1, and a first bolt 4 for fixing is screwed in the screw hole.

[0028] In this embodiment, an elastic member is provided between the two connecting parts 1, and the elastic member is composed of a rubber member 2 and a spring assembly 3. The rubber member 2 is sleeved on the outside of the spring assembly 3, so that the rubber member 2 and the spring assembly 3 cooperate to increase the elasticity of the motor connecting shaft, thereby solving the problem of insufficient elastic force when only rubber is used as the elastic member for reset, and also solving the problem of plastic deformation caused by excessive deformation when only spring is used as the elastic member.

[0029] Specifically, the connecting portion 1 includes an outer sleeve 11 and three retaining bars 12 integrally formed at the end of the outer sleeve 11. An inner sleeve 13 is integrally formed inside the outer sleeve 11 near one end of the retaining bar 12. The inner surface of the inner sleeve 13 defines a limiting groove 14. The rubber member 2 is mounted between the retaining bars 12 of the two connecting portions 1, and the ends of the spring assembly 3 are fixed within the inner sleeve 13 via a first bolt 4. In this embodiment, the connecting portion 1, which is composed of the outer sleeve 11, retaining bars 12, inner sleeve 13, and retaining grooves 14, and the rubber member 2 is mounted between the retaining bars 12 of the two connecting portions 1, while the ends of the spring assembly 3 are fixed within the inner sleeve 13 via the first bolt 4, facilitates the installation of the elastic member between the two connecting portions 1, and increases the stability of the elastic member installation.

[0030] Specifically, the rubber member 2 includes a rubber strip 21 and a connecting plate 22. The connecting plate 22 is integrally formed between two adjacent rubber strips 21. Six rubber strips 21 and six connecting plates 22 are provided. After the ends of the two connecting portions 1 are connected via the spring assembly 3, the baffles 12 between the two ends are staggered to form six cavities. The six rubber strips 21 correspond to the six cavities, and the connecting plates 22 are located at the ends of the baffles 12. In this embodiment, the rubber member 2 is composed of rubber strips 21 and connecting plates 22. Six rubber strips 21 and six connecting plates 22 are provided. The connecting plates 22 are integrally formed between two rubber strips 21, and the six connecting plates 22 are staggered. This facilitates the installation of the rubber strips 21 in the cavities between the six baffles 12. The staggered connecting plates 22 are located at the ends of the baffles 12, thereby increasing the stability of the rubber member 2 installed between the two connecting portions 1.

[0031] Specifically, the spring assembly 3 includes two symmetrically arranged baffles 31, and a first spring 32 and a second spring 33 are welded between the two baffles 31. The second spring 33 is sleeved on the outside of the first spring 32, and a working gap is set between the two. A hexagonal prism 34 is welded on the outer surface of the baffle 31, and the hexagonal prism 34 is installed in the limiting groove 14. The first bolt 4 is screwed into the screw holes opened on the surface of the inner sleeve 13, the hexagonal prism 34 and the baffle 31. The rotation directions of the first spring 32 and the second spring 33 are opposite. In this embodiment, a spring assembly 3 is composed of a baffle 31, a first spring 32, a second spring 33 and a hexagonal prism 34, and a first spring 32 and a second spring 33 are welded between the two baffles 31. At the same time, the rotation directions of the first spring 32 and the second spring 33 are arranged so that the first spring 32 and the second spring 33 cooperate to provide elastic force for the spring assembly 3. The hexagonal prism 34 welded on the outside of the baffle 31 is installed in the limiting groove 14, and the first bolt 4 is screwed into the holes opened on the surface of the inner sleeve 13, the hexagonal prism 34 and the baffle 31, so that the two ends of the spring assembly 3 are fixed in the inner sleeve 13 by the first bolt 4.

[0032] Specifically, the shaft rod 5 is sleeved in the outer sleeve 11, and the end of the shaft rod 5 is provided with an inner hexagonal hole 6, and the inner hexagonal hole 6 is sleeved on the outside of the inner sleeve 13, and the outer sleeve 11 and the surface of the shaft rod 5 are provided with screw holes, in which the second bolt 7 is screwed. In this embodiment, the shaft rod 5 is sleeved in the outer sleeve 11, and the inner hexagonal hole 6 at the end of the shaft rod 5 is sleeved on the outside of the inner sleeve 13, and the outer sleeve 11 and the surface of the shaft rod 5 are provided with screw holes, in which the second bolt 7 is screwed, thereby facilitating the fixation of the connecting portion 1 and the shaft rod 5.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flexible motor connecting shaft, comprising a connecting portion (1), characterized in that: Two connecting parts (1) are provided, an elastic member is provided between the two connecting parts (1), and the two connecting parts (1) are centrally symmetrical about the elastic member; The elastic member comprises a rubber member (2) and a spring assembly (3); the rubber member (2) is sleeved on the outside of the spring assembly (3); a screw hole is provided at the connection between the spring assembly (3) and the connecting portion (1), and a first bolt (4) for fixing is screwed into the screw hole.

2. The flexible motor connecting shaft according to claim 1, characterized in that: The connecting portion (1) comprises an outer sleeve (11) and three retaining bars (12) integrally formed at the end of the outer sleeve (11); an inner sleeve (13) is integrally formed inside the outer sleeve (11) near one end of the retaining bars (12); a limiting groove (14) is provided on the inner surface of the inner sleeve (13); the rubber member (2) is installed between the retaining bars (12) of the two connecting portions (1); and both ends of the spring assembly (3) are fixed in the inner sleeve (13) by a first bolt (4).

3. The flexible motor connecting shaft according to claim 2, characterized in that: The rubber member (2) comprises a rubber strip (21) and a connecting plate (22), wherein the connecting plate (22) is integrally formed between two adjacent rubber strips (21), and six rubber strips (21) and six connecting plates (22) are provided. The blocking strips (12) at the ends of the two connecting parts (1) are staggered to form six cavities, and the six rubber strips (21) are located in the six cavities. The connecting plate (22) is located at the ends of the blocking strips (12).

4. The flexible motor connecting shaft according to claim 2, characterized in that: The spring assembly (3) includes two symmetrically arranged baffles (31), a first spring (32) and a second spring (33) are welded between the two baffles (31), the second spring (33) is sleeved on the outside of the first spring (32), a hexagonal prism (34) is welded on the outer surface of the baffle (31), and the hexagonal prism (34) is installed in the limiting groove (14), and the first bolt (4) is screwed into the screw holes opened on the surfaces of the inner sleeve (13), the baffle (31) and the hexagonal prism (34).

5. The flexible motor connecting shaft according to claim 4, characterized in that: The first spring (32) and the second spring (33) rotate in opposite directions.

6. The flexible motor connecting shaft according to claim 2, characterized in that: The outer sleeve (11) is sleeved with a shaft (5), an inner hexagonal hole (6) is provided at the end of the shaft (5), and the inner hexagonal hole (6) is sleeved on the outside of the inner sleeve (13), and a second bolt (7) is screwed into the screw holes provided on the surfaces of the outer sleeve (11) and the shaft (5).

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