Transmission connection structure and transmission mechanism comprising same

Abstract

The utility model provides a transmission connection structure and a transmission mechanism comprising the transmission connection structure, relates to the technical field of connection structures, and solves the technical problems that a key connection mode in the transmission mechanism is complex in processing, high in cost, easy to concentrate stress and easy to break. The transmission connection structure comprises a wedge-shaped mortise and tenon joint structure located between two transmission parts, and transmission connection between the two transmission parts in the transmission mechanism is achieved through the wedge-shaped mortise and tenon joint structure. The wedge-shaped mortise and tenon joint structure comprises a base, an elastic piece and a connecting piece. Connection is achieved through the wedge-shaped mortise and tenon joint structure, machining processes are reduced, machining cost is reduced, stress concentration is reduced, connection firmness is enhanced, the risk of shaft breakage is reduced, and transmission stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of connection structures, in particular to a transmission connection structure and a transmission mechanism comprising the same. Background Art

[0002] Most of the traditional synchronous pulleys, gears, and sprocket transmissions use key connections. This connection process requires machining keyways on the drive shaft and driven components (synchronous pulleys, gears, and sprockets) respectively. Since the drive shaft is a non-standard part, machining keyways makes the machining process complicated and the consistency of machining cannot be maintained, which not only increases the machining cost, but also the change in shaft shape and the reduction in cross-sectional area can easily cause stress concentration and lead to fracture. Utility Model Content

[0003] The utility model aims to provide a transmission connection structure and a transmission mechanism including the same, so as to solve the technical problems of the key connection method in the transmission mechanism in the prior art, such as complex processing, high cost, easy stress concentration and fracture.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a transmission connection structure, comprising a wedge-shaped mortise and tenon structure located between two transmission components, and the transmission connection between the two transmission components in the transmission mechanism is achieved through the wedge-shaped mortise and tenon structure.

[0006] The transmission connection structure provided by the utility model adopts a wedge-shaped mortise and tenon structure to replace a traditional keyway connection, and utilizes the balance of wedge force and the law of conservation of energy to ensure that the transmission parts are firmly connected.

[0007] As a further improvement of the utility model, the wedge-shaped mortise and tenon structure comprises: a base, an elastic member and a connecting member; wherein:

[0008] One side of the base extends outward to form a clamping portion with adjustable diameter; a transmission component is inserted into the clamping portion to realize connection with the base by using the clamping portion;

[0009] The elastic member is sleeved on the outside of the clamping part to use elastic force to pop the base out of another transmission component;

[0010] Another transmission component is sleeved on the outside of the base and a transmission component. One end of the connecting member is connected to one transmission component, and the other end is connected to another transmission component. The pressure applied to the elastic member is adjusted by adjusting the connection depth between the connecting member and the transmission component.

[0011] As a further improvement of the utility model, the base is a flange structure, and a plurality of connecting holes are evenly arranged along the circumferential direction for the connecting parts to pass through or connect; the clamping part includes a hollow clamping tube with a certain taper and a plurality of V-notches opened at the end of the clamping tube.

[0012] As a further improvement of the present invention, the number of the V-notches is four, which are evenly arranged along the circumferential direction of the holding tube.

[0013] As a further improvement of the present invention, the depth of the V-notch is equal to 1 / 3-2 / 3 of the length of the holding tube.

[0014] As a further improvement of the present invention, a limiting groove for limiting the elastic member is provided on the base toward the side of the clamping portion.

[0015] As a further improvement of the present invention, the elastic member is a cylindrical spring.

[0016] The utility model utilizes the elastic deformation characteristics of spring metal materials, the force balance theory and the principle of vibration absorption to improve the connection force, anti-loosening and mechanical impact reduction capabilities of the transmission parts, thereby solving the problems of decreased connection force, easy loosening and mechanical impact, and difficult disassembly of the transmission parts.

[0017] The transmission connection structure provided by the utility model adopts a wedge-shaped mortise and tenon connection structure to replace the traditional keyway connection, utilizes the balance of wedge force and the law of conservation of energy to firmly connect the transmission parts, and solves the problem of cumbersome keyway processing procedures and fracture caused by stress concentration.

[0018] In a second aspect, the utility model provides a transmission mechanism, comprising a first transmission component, a second transmission component and the transmission connection structure; the transmission connection structure is arranged between the first transmission component and the second transmission component to achieve a transmission connection between the two transmission components.

[0019] As a further improvement of the present invention, the first transmission component is a rotating shaft; the rotating shaft passes through the second transmission component and the wedge-shaped mortise and tenon structure in sequence; and / or,

[0020] The second transmission component is a driven gear, which is provided with a recessed groove for accommodating the base in the wedge-shaped mortise and tenon structure; the driven gear is also provided with a wedge-shaped through hole for the clamping part in the base to pass through.

[0021] As a further improvement of the present invention, the thickness of the second transmission component is greater than the thickness of the wedge-shaped mortise and tenon structure.

[0022] As a further improvement of the utility model, a limiting slot is provided in the middle of the recessed groove near the position of the wedge-shaped through hole to limit the elastic member in the wedge-shaped mortise and tenon structure; and / or, a plurality of threaded connection holes are provided in the recessed groove along the circumferential direction for the connection member in the wedge-shaped mortise and tenon structure to pass through.

[0023] The transmission mechanism provided by the utility model adopts a wedge-shaped mortise and tenon structure to achieve connection, which not only reduces processing technology, reduces processing costs, and reduces stress concentration, but also enhances connection firmness, reduces the risk of shaft breakage, and improves transmission stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is an assembly structure diagram of the driven gear and the base in the transmission mechanism of the utility model;

[0026] Figure 2 It is a top view of the driven gear and the base in the transmission mechanism of the utility model when they are assembled together;

[0027] Figure 3 yes Figure 2 The main view of

[0028] Figure 4 yes Figure 3 AA section view;

[0029] Figure 5 yes Figure 2 Bottom view of

[0030] Figure 6 It is an exploded view of the driven gear and the base in the transmission mechanism of the utility model;

[0031] Figure 7 It is a cross-sectional view of the transmission mechanism of the utility model;

[0032] Figure 8 It is an axonometric view of the transmission mechanism of the utility model;

[0033] Fig. 9 It is an isometric view of a driven gear in the transmission mechanism of the utility model from one perspective;

[0034] Fig.10 It is an isometric view of the driven gear in the transmission mechanism of the utility model from another perspective;

[0035] Fig.11 It is a top view of the driven gear in the transmission mechanism of the utility model;

[0036] Fig.12 yes Fig.11 Middle BB section view;

[0037] Fig.13 It is an isometric view of the base in the transmission connection structure of the utility model;

[0038] Fig.14 It is a front view of the base in the transmission connection structure of the utility model;

[0039] Fig.15 yes Fig.14 Middle CC section view;

[0040] Fig.16 It is an isometric view of the elastic member in the transmission connection structure of the utility model;

[0041] Fig.17 It is a front view of the elastic member in the transmission connection structure of the utility model;

[0042] Fig.18 It is a top view of the elastic member in the transmission connection structure of the utility model.

[0043] In the figure, 1, base; 11, clamping part; 111, clamping tube; 112, V-notch; 12, connecting hole; 13, limiting groove; 2, elastic member; 3, connecting member; 4, rotating shaft; 5, driven gear; 51, recessed groove; 52, wedge-shaped through hole; 53, limiting slot; 54, threaded connecting hole. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0045] Embodiment 1:

[0046] like Figure 7-Figure 8 As shown, in this embodiment, the utility model provides a transmission connection structure, which is used for the transmission connection between two transmission components in a transmission mechanism; specifically, the transmission connection structure includes a wedge-shaped mortise and tenon structure located between the two transmission components, and the transmission connection between the two transmission components in the transmission mechanism is achieved through the wedge-shaped mortise and tenon structure.

[0047] The transmission connection structure provided by the utility model adopts a wedge-shaped mortise and tenon structure to replace a traditional keyway connection, and utilizes the balance of wedge force and the law of conservation of energy to ensure that the transmission parts are firmly connected.

[0048] Embodiment 2:

[0049] The difference between the second embodiment and the first embodiment is that, in the present embodiment, the wedge-shaped mortise and tenon structure is specifically defined. Figure 1-Figure 18 As shown, in this embodiment, the wedge-shaped mortise and tenon structure includes: a base 1, an elastic member 2 and a connecting member 3; wherein:

[0050] like Figure 13-Figure 15 As shown, an axial center on one side of the base 1 extends outward to form a clamping portion 11, and the clamping portion 11 is a hollow structure with an adjustable diameter. The wedge-shaped mortise and tenon structure is realized by adjusting the diameter thereof, thereby realizing the adjustment of the clamping force. A transmission component is passed through the clamping portion 11 to utilize the clamping portion 11 to realize the connection with the base 1, that is, one of the transmission components is passed through the clamping portion 11, and the diameter of the clamping portion 11 is adjustable. When it is necessary to increase the connection strength, the diameter of the clamping portion 11 can be controlled to be further reduced, and its function is similar to the wedge-shaped mortise and tenon structure, thereby improving the connection strength and stability between the base 1 and the moving component. It should be noted here that the clamping part 11 with adjustable diameter can be implemented in various forms. For example, the clamping part can be made of a material with a certain elastic deformation ability, and then deform and shrink when pressure is applied. The diameter can also be adjusted in the form of an airbag. For example, when the airbag is inflated with more air, the inner diameter becomes smaller to achieve a reduction in diameter, and when the airbag is inflated with less air, the inner diameter becomes larger and the diameter increases. Of course, other forms can also be used to achieve adjustable diameter, which are not specifically limited here.

[0051] like Figure 16-Figure 18 As shown, the elastic member 2 is sleeved on the outside of the clamping part 11 to use the elastic force to pop the base 1 out of another transmission component. The elastic member 2 can be a spring. Due to the characteristics of the spring, the main function of the spring is to pre-tighten, prevent loosening and rebound during disassembly. During operation, the rotating shaft 4 and the driven gear 5 are in a tight fit state. If there is no spring, it is necessary to use a screw or knock to remove the driven gear 5 from the rotating shaft 4 during disassembly. The spring can directly pop the base 1 out of the rotating shaft 4 under the action of the spring force, thus realizing the disassembly of the wedge-shaped mortise and tenon structure, thereby facilitating the disassembly between the two transmission components.

[0052] Another transmission component is sleeved on the outside of the base 1 and a transmission component. One end of the connecting member 3 is connected to one transmission component, and the other end is connected to another transmission component. The pressure applied to the elastic member 2 is adjusted by adjusting the connection depth between it and the transmission component.

[0053] It should be noted here that if Figure 9-12As shown, the two transmission components in this embodiment can be a rotating shaft 4 and a driven gear 5, that is, the driven gear 5 is sleeved on the outside of the base 1 and the rotating shaft 4, the base 1 is located between the driven gear 5 and the rotating shaft 4, the base 1 is first pressed on the elastic member 2, and then the connecting member 3 first passes through the base 1 and is connected to the driven gear 5. Since the elastic member 2 is located between the base 1 and the driven gear 5, when the connecting member 3 is connected to the driven gear 5, the pressure applied by the base 1 to the elastic member 2 can be achieved by adjusting the connection depth, and the diameter of the clamping portion 11 can be adjusted by the pressure of the elastic member 2, thereby adjusting the connection strength between the driven gear 5 and the rotating shaft 4.

[0054] The transmission connection structure provided by the utility model adopts a wedge-shaped mortise and tenon connection structure to replace the traditional keyway connection, utilizes the balance of wedge force and the law of conservation of energy to firmly connect the transmission parts, and solves the problem of cumbersome keyway processing procedures and fracture caused by stress concentration.

[0055] In order to facilitate processing and match the appearance of the transmission mechanism, in this embodiment, the base 1 is a flange structure, and a plurality of connecting holes 12 are evenly arranged along the circumferential direction for the connecting member 3 to pass through or connect;

[0056] It should be noted here that the connection hole 12 can be a plain hole or a threaded hole, and can be set according to actual needs.

[0057] The holding portion 11 includes a hollow holding tube 111 with a certain taper and a plurality of V-notches 112 formed at the end of the holding tube 111 .

[0058] It should be noted here that the holding tube 111 is a frustoconical structure with a relatively thin wall thickness, which can move inward and deform when under pressure. By setting a V-notch 112, a plurality of holding blades are formed at the end of the holding tube 111. Each holding blade can move inward after being subjected to pressure from the elastic part 2 on the outside, thereby reducing the diameter of the holding portion 11.

[0059] In this embodiment, there are four V-notches 112 , thereby forming four clamping blades. The four V-notches 112 are evenly arranged along the circumferential direction of the clamping tube 111 .

[0060] In order to ensure a good deformation effect, that is to say to achieve a good wedge-shaped mortise and tenon joint effect, the depth of the V-notch 112 is equal to 1 / 3-2 / 3 of the length of the clasping tube 111. As for which depth to adopt, it can be selected and set according to actual conditions.

[0061] It should be noted that, in the present embodiment, the elastic member 2 is a cylindrical spring, which is sleeved on the outside of the clamping portion 11 , and the upper end of the cylindrical spring abuts against the base 1 , and the bottom end abuts against the driven gear 5 .

[0062] The utility model utilizes the elastic deformation characteristics of spring metal materials, the force balance theory and the principle of vibration absorption to improve the connection force, anti-loosening and mechanical impact reduction capabilities of the transmission parts, thereby solving the problems of decreased connection force, easy loosening and mechanical impact, and difficult disassembly of the transmission parts.

[0063] Embodiment 3:

[0064] The difference between the present embodiment 3 and the embodiment 2 is that, in the present embodiment, Figure 4 , Figure 6 , Figure 7 , Fig.13 As shown, a limiting groove 13 for limiting the elastic member 2 is provided on the base 1 toward the side of the holding portion 11. The limiting groove 13 is located between the holding portion 11 and the connecting hole 12.

[0065] Furthermore, since the elastic member 2 is a cylindrical spring having a certain inner diameter and line width, in the present embodiment, the limit groove 13 is a circular ring structure, and the width of the circular ring can be equal to the line width of the cylindrical spring. Through this structural setting, not only can the end of the cylindrical spring abutting against the base 1 be inserted into the limit groove 13 to achieve axial limitation, but it can also prevent it from moving radially, thereby achieving radial limitation.

[0066] Embodiment 4:

[0067] In this embodiment, if Figure 1 Fig.18 As shown, a transmission mechanism provided by the utility model includes a first transmission component, a second transmission component and a transmission connection structure as in Example 1 and Example 2, or, Examples 1-3; the transmission connection structure is arranged between the first transmission component and the second transmission component to realize the transmission connection between the two transmission components.

[0068] Specifically, in this embodiment, the first transmission component is the rotating shaft 4; the rotating shaft 4 passes through the second transmission component and the wedge-shaped mortise and tenon structure in sequence; at this time, the second transmission component can be a sprocket, a synchronous pulley, a gear, etc.; the transmission connection between the rotating shaft 4 and the sprocket or synchronous pulley or the gear is realized by the wedge-shaped mortise and tenon structure, and there is no need to open a key groove on the rotating shaft 4 and the second transmission component, which not only reduces the processing technology, reduces the processing cost, and reduces stress concentration, but also enhances the connection firmness, reduces the risk of shaft breakage, and improves the transmission stability.

[0069] It should be noted here that in order to ensure the appearance effect, reduce material input and lower processing costs, in this embodiment, the thickness of the second transmission component is greater than the thickness of the wedge-shaped mortise and tenon structure. Through this structural setting, the wedge-shaped mortise and tenon structure cannot be seen on the outside of the second transmission component, but is embedded in the second transmission component. Under the premise of ensuring a good connection, the appearance structure is not damaged.

[0070] Furthermore, the second transmission component can be a driven gear 5, which has a recessed groove 51 in the middle, and the recessed groove 51 is used to accommodate the base 1 in the wedge-shaped mortise and tenon structure; the driven gear 5 is also provided with a wedge-shaped through hole 52 for the clamping part 11 in the base 1 to pass through, and the wedge-shaped through hole 52 is a conical through hole with a certain taper ratio.

[0071] In order to further ensure the connection effect and stability and prevent the elastic member 2 from shaking and moving, in the present embodiment, a limiting slot 53 can be provided in the middle of the recessed groove 51 near the wedge-shaped through hole 52 to limit the elastic member 2 in the wedge-shaped mortise and tenon structure; specifically, the limiting slot 53 is a circular ring structure, and its inner diameter is equal to the inner diameter of the cylindrical spring, and its outer diameter is equal to the outer diameter of the cylindrical spring; when in use, the bottom of the elastic member 2 can be inserted into the limiting slot 53, thereby realizing the axial and radial limitation of the elastic member 2.

[0072] It should be noted here that in order to achieve the limitation of the elastic member 2, the limiting groove 13 can be set only on the base 1, or the limiting card groove 53 can be set only in the recessed groove 51, or the limiting groove 13 can be set on the base 1 and the limiting card groove 53 can be set in the recessed groove 51 at the same time. As for which method is adopted, the utility model does not make any specific limitation, and the setting can be selected according to actual needs.

[0073] Four equally spaced connecting holes 12 are provided on the base 1 along the circumferential direction, and the taper ratio of the clamping portion 11 is consistent with the taper ratio of the wedge-shaped through hole 52 .

[0074] In order to facilitate the connection of the connecting member 3, a plurality of threaded connecting holes 54 are evenly distributed along the circumferential direction in the recessed groove 51 for the connecting member 3 in the wedge-shaped mortise and tenon structure to penetrate. Further, in this embodiment, the connecting member 3 is a fastening screw.

[0075] The transmission mechanism provided by the utility model adopts a wedge-shaped mortise and tenon structure to achieve connection, which not only reduces processing technology, reduces processing costs, and reduces stress concentration, but also enhances connection firmness, reduces the risk of shaft breakage, and improves transmission stability.

[0076] After the transmission mechanism of the present invention is assembled, the four V-notches 112 on the clamping part 11 cause the clamping part 11 to deform. During the tightening process of the fastening screw, the cross-sectional area gradually decreases, thereby forming a contraction and closing, so that the rotating shaft 4 is firmly held.

[0077] Assembly method:

[0078] First, insert the base 1 into the rotating shaft 4, then put the cylindrical spring into the limiting groove 13 of the base 1, and then insert the driven gear 5, rotate it to the connecting hole 12 and the threaded connecting hole 54, and then insert the fastening screw. After the fastening screw passes through the connecting hole 12 of the base 1, it is connected to the threaded connecting hole 54 of the driven gear 5. At this time, the base 1 and the driven gear 5 form a wedge, and under the rotational torque of the fastening screw, the driven gear 5 is pushed forward toward the base 1. Since there are four triangular V-notches 112 on the four sides of the conical cylindrical clamping part 11 of the base 1, it advances and retracts under the action of the rotational torque (when the screw is tightened, under the action of the screw tension, the base 1 and the driven gear 5 come together, the cylindrical spring is compressed, the driven gear 5 is displaced forward, and the front end is closed and contracted). Utilize the wedge, force balance and the law of conservation of energy to firmly clamp the rotating shaft 4.

[0079] The utility model provides a spring between the base 1 and the driven gear 5, utilizing the elastic deformation characteristics of the spring, the force balance theory and the principle of vibration absorption, thereby effectively preventing the connection from loosening and reducing mechanical shock. During disassembly, only four fastening screws need to be loosened, and the base 1 can be ejected under the reaction force of the spring, thereby effectively solving the problem of difficulty in disassembly caused by bite and jamming due to deformation.

[0080] In this embodiment, the working principle of the spring is the same as the spring washer principle in the fastener. According to the force balance theory, the force applied to the spring when compressed is equal to the reaction force of the spring, so the screw can always maintain a certain tightening torque. At the same time, the spring has a vibration absorption effect, which effectively prevents the screw from loosening due to operating vibration.

[0081] It should be noted that the second transmission component in the drawings of the specification is a driven gear, which is only an illustration of an embodiment. It can also be other transmission components, such as synchronous pulleys, gears, sprockets and other transmission components.

[0082] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A transmission connection structure, characterized in that: It includes a wedge-shaped mortise and tenon structure located between two transmission components, and the transmission connection between the two transmission components in the transmission mechanism is realized through the wedge-shaped mortise and tenon structure; the wedge-shaped mortise and tenon structure includes: a base, an elastic member and a connecting member; wherein: One side of the base extends outward to form a clamping portion with adjustable diameter; a transmission component is inserted into the clamping portion to realize connection with the base by using the clamping portion; The elastic member is sleeved on the outside of the clamping part to use elastic force to pop the base out of another transmission component; Another transmission component is sleeved on the outside of the base and a transmission component. One end of the connecting member is connected to one transmission component, and the other end is connected to another transmission component. The pressure applied to the elastic member is adjusted by adjusting the connection depth between the connecting member and the transmission component.

2. The transmission connection structure according to claim 1, characterized in that: The base is a flange structure, and a plurality of connecting holes are evenly arranged along the circumferential direction for the connecting piece to pass through or connect; the clamping part includes a hollow clamping tube with a certain taper and a plurality of V-notches opened at the end of the clamping tube.

3. The transmission connection structure according to claim 2, characterized in that: The number of the V-notches is four and they are evenly arranged along the circumferential direction of the holding tube.

4. The transmission connection structure according to claim 2, characterized in that: The depth of the V-notch is equal to 1 / 3-2 / 3 of the length of the tube.

5. The transmission connection structure according to claim 2, characterized in that: A limiting groove for limiting the elastic member is provided on the base toward one side of the clamping portion.

6. The transmission connection structure according to claim 2, characterized in that: The elastic member is a cylindrical spring.

7. A transmission mechanism, characterized in that: It comprises a first transmission component, a second transmission component and a transmission connection structure as described in any one of claims 1 to 6; the transmission connection structure is arranged between the first transmission component and the second transmission component to realize the transmission connection between the two transmission components.

8. The transmission mechanism according to claim 7, characterized in that: The first transmission component is a rotating shaft; the rotating shaft passes through the second transmission component and the wedge-shaped mortise and tenon structure in sequence; and / or, The second transmission component is a driven gear, which is provided with a recessed groove for accommodating the base in the wedge-shaped mortise and tenon structure; the driven gear is also provided with a wedge-shaped through hole for the clamping part in the base to pass through.

9. The transmission mechanism according to claim 7, characterized in that: The thickness of the second transmission component is greater than the thickness of the wedge-shaped mortise and tenon structure.

10. The transmission mechanism according to claim 8, characterized in that: A limiting slot is provided in the middle of the recessed groove near the wedge-shaped through hole to limit the elastic member in the wedge-shaped mortise and tenon structure; and / or, a plurality of threaded connection holes are provided in the recessed groove along the circumferential direction for the connection member in the wedge-shaped mortise and tenon structure to pass through.

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