A gear clutch structure

Abstract

The present application relates to the technical field of clutches, and discloses a gear clutch structure. The number of teeth of the driving gear is z1, the number of teeth of the driven gear is z2, and the number of meshing teeth is n, where z2 = nz / z1. One of the driving gear and the driven gear is evenly distributed circumferentially and divided into a first tooth groups, and the interval between two adjacent teeth in the same first tooth group is (360 / n)°. The other is divided into n second tooth groups, and each second tooth group includes b adjacent teeth. The teeth at the same position in any one of the second tooth groups can mesh with the teeth in any one of the first tooth groups. In the meshing state, there is a distance of twice the tooth thickness between one of the teeth in the second tooth group except the meshing teeth and one of the teeth in a first tooth group. Among the two teeth with a distance of twice the tooth thickness, the driving gear is located behind the driven gear. The present application solves the problems of tooth collision and tooth jamming through tooth reduction design, and the driving gear and the driven gear can mesh with each other at any rotation angle, and the clutch function can be normally exerted.

Description

Technical Field

[0001] This application relates to the technical field of clutches, and particularly to a gear clutch structure. Background Art

[0002] The related art gear clutch 1' is as Figure 1 shown. The gear clutch 1' includes a driving gear 11' and a driven gear 12'. The driving gear 11' has driving teeth 111', and the driven gear 12' has driven teeth 121'. When the driving teeth 111' and the driven teeth 121' are engaged, the driving gear 11' drives the driven gear 12' to rotate. The driving gear 11' moves axially to achieve meshing or separation from the driven gear 12', thereby realizing the clutch function.

[0003] It can be seen that in the related art gear clutch 1', the driving gear 11' and the driven gear 12' are engaged through all the teeth, and the number of engaged teeth is relatively large. It is easy to collide or jam teeth during axial meshing, causing tooth profile damage and limiting the clutch function. Moreover, the processing accuracy requirements for the driving gear 11' and the driven gear 12' are high, and it is not easy to be processed into shape, increasing the production cost and reducing the production efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a gear clutch structure to solve the problems of tooth collision and jamming during axial meshing and ensure the normal exertion of the clutch function.

[0005] To solve the above technical problems, this application provides a gear clutch structure, including a driving gear and a driven gear. The number of teeth of the driving teeth of the driving gear is z1, and the number of teeth of the driven teeth of the driven gear is z2. The number of meshing teeth between the driving gear and the driven gear is n. z1 is an integer multiple of n, z2 is an integer multiple of n, and the relationship between z2 and z1 is: z2 = nz / z1;

[0006] Wherein: z is the total number of teeth of the driving gear and the driven gear, z is a composite number, n is a factor of z, 3 ≤ n < z, and n is divisible by 360, and at least one of z1 and z2 is less than z;

[0007] One of the driving teeth and the driven teeth is evenly distributed circumferentially, and one of the driving teeth and the driven teeth is divided into a first tooth groups. a = z1 / n, or a = z2 / n. The interval between two adjacent teeth in the same first tooth group is (360 / n)°;

[0008] The other of the driving teeth and the driven teeth is divided into n second tooth groups, and each second tooth group includes adjacent b teeth, b = z1 / n, or b = z2 / n;

[0009] Any tooth at the same position in any one of the second tooth groups can mesh with the teeth in any one of the first tooth groups. In the meshing state, there is a distance of twice the tooth thickness between one of the teeth in the second tooth group except the meshing teeth and one of the teeth in one of the first tooth groups, and among the two teeth with the distance of twice the tooth thickness, the driving tooth is located behind the driven tooth.

[0010] In the gear clutch structure of the present application, a tooth reduction design is carried out on the driving gear and / or the driven gear. The driving gear and the driven gear are meshed only through n teeth (instead of complete teeth). Each second tooth group only needs a single tooth to align with the teeth of the first tooth group, reducing the phenomenon of tooth collision or jamming caused by multi-tooth alignment, avoiding tooth profile damage, reducing the machining accuracy of the driving gear and / or the driven gear, making the driving gear and / or the driven gear easy to be machined and formed, reducing the production cost of the driving gear and / or the driven gear, and improving the production efficiency of the driving gear and / or the driven gear; moreover, no matter how the driving gear rotates relative to the driven gear by any angle, they can mesh with each other, ensuring that the gear clutch structure can normally perform the clutch function; each second tooth group meshes with the teeth of the first tooth group through a single tooth, ensuring that the meshing points are evenly distributed on the circumference and improving the transmission smoothness.

[0011] Optionally, n is the smallest number among the factors of z that are not less than 3.

[0012] Optionally, a = 2, b is an even number greater than 2. The teeth in the second tooth group are symmetrically arranged about the circumferential center line of the second tooth group. There is a distance of one tooth thickness between the two teeth closest to the circumferential center line. There is a distance of three times the tooth thickness between two adjacent teeth on the same side of the circumferential center line. There is a distance of five times the tooth thickness between the two closest teeth in two adjacent second tooth groups.

[0013] Optionally, b = 4. There is a distance of seven times the tooth thickness between two adjacent teeth in two adjacent first tooth groups that are close to each other.

[0014] Optionally, b = 6. There is a distance of eleven times the tooth thickness between two adjacent teeth in two adjacent first tooth groups that are close to each other.

[0015] Optionally, a = b, a > 3, b > 3. The distance between two adjacent teeth in the second tooth group is equal. The distance between two adjacent teeth in the second tooth group is two times the tooth thickness larger than the distance between two adjacent teeth in two adjacent first tooth groups that are close to each other. There is a distance of one tooth thickness between the two closest teeth in two adjacent second tooth groups.

[0016] Optionally, a = b = 4. There is a distance of nine times the tooth thickness between two adjacent teeth in the second tooth group, a distance of seven times the tooth thickness between two adjacent teeth in the first tooth group, and a distance of one tooth thickness between the two closest teeth in two adjacent second tooth groups.

[0017] Optionally, a = 3 and b = 4. The second tooth group includes a first tooth, a second tooth, a third tooth, and a fourth tooth arranged in sequence. There is a distance of three times the tooth thickness between the first tooth and the second tooth, a distance of five times the tooth thickness between the second tooth and the third tooth, and a distance of three times the tooth thickness between the third tooth and the fourth tooth. There is a distance of nine times the tooth thickness between the two closest teeth in two adjacent second tooth groups, and a distance of seven times the tooth thickness between two mutually approaching teeth in two adjacent first tooth groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a related-art gear clutch;

[0019] Figure 2 is a schematic structural diagram of the first specific embodiment of the gear clutch structure provided by the present application in the coupled state;

[0020] Figure 3 is Figure 2 a schematic structural diagram of the gear clutch structure in the separated state;

[0021] Figure 4 is Figure 2 a schematic structural diagram of the gear clutch structure in the first engaged state;

[0022] Figure 5 is Figure 2 a schematic structural diagram of the gear clutch structure in the second engaged state;

[0023] Figure 6 is Figure 2 a schematic structural diagram of the gear clutch structure in the third engaged state;

[0024] Figure 7 is Figure 2 a schematic structural diagram of the gear clutch structure in the fourth engaged state;

[0025] Figure 8 is a schematic structural diagram of the second specific embodiment of the gear clutch structure provided by the present application in the first engaged state;

[0026] Figure 9 is Figure 8 a schematic structural diagram of the gear clutch structure in the second engaged state;

[0027] Figure 10 is Figure 8Schematic diagram of the gear clutch structure in the third engagement state;

[0028] Figure 11 For Figure 8 Schematic diagram of the gear clutch structure in the fourth engagement state;

[0029] Figure 12 For Figure 8 Schematic diagram of the gear clutch structure in the fifth engagement state;

[0030] Figure 13 For Figure 8 Schematic diagram of the gear clutch structure in the sixth engagement state;

[0031] Figure 14 This is the schematic diagram of the gear clutch structure provided by this application in the first engagement state of the third specific embodiment;

[0032] Figure 15 For Figure 14 Schematic diagram of the gear clutch structure in the second engagement state;

[0033] Figure 16 For Figure 14 Schematic diagram of the gear clutch structure in the third engagement state;

[0034] Figure 17 For Figure 14 Schematic diagram of the gear clutch structure in the fourth engagement state;

[0035] Figure 18 This is the schematic diagram of the gear clutch structure provided by this application in the first engagement state of the fourth specific embodiment;

[0036] Figure 19 For Figure 18 Schematic diagram of the gear clutch structure in the second engagement state;

[0037] Figure 20 For Figure 18 Schematic diagram of the gear clutch structure in the third engagement state;

[0038] Figure 21 For Figure 18 Schematic diagram of the gear clutch structure in the fourth engagement state;

[0039] Among them, Figure 1 The reference numerals in are as follows:

[0040] 1'-Gear clutch; 11'-Driving gear; 12'-Driven gear;

[0041] Among them, Figures 2 - 21 The reference numerals in are as follows:

[0042] 1 - Driving gear; 11 - Driving teeth; 11a - First driving tooth; 11b - Second driving tooth; 11c - Third driving tooth; 11d - Fourth driving tooth;

[0043] 2 - Driven gear; 21 - Driven teeth; 2a - Second tooth group; 21a - First driven tooth; 21b - Second driven tooth; 21c - Third driven tooth; 21d - Fourth driven tooth; 21e - Fifth driven tooth; 21f - Sixth driven tooth. Detailed implementation mode

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0046] It should be understood that the "some embodiments" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the "in some embodiments" that appear throughout the specification do not necessarily refer to the same embodiments. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0047] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. 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.

[0048] In the related art of gear clutches, the driving gear and the driven gear are engaged through all their teeth. Since the number of engaged teeth is relatively large, it is easy to cause tooth collision or jamming during axial engagement, resulting in tooth profile damage and limited clutch function. Moreover, the processing accuracy requirements for the driving gear and the driven gear are high, making it difficult to machine and form them, increasing production costs and reducing production efficiency.

[0049] Since the driving gear and the driven gear need to be continuously engaged or disengaged, therefore, if the number of teeth of the driving gear and the driven gear is reduced to solve the problems of tooth collision and jamming, it is necessary to ensure that the driving gear and the driven gear can be engaged regardless of the rotation angle.

[0050] Please refer to Figures 2 - 7 , Figure 2 which is a schematic structural diagram of the first specific embodiment of the gear clutch structure provided by this application in the coupled state; Figure 3 It is Figure 2 a schematic structural diagram of the gear clutch structure in the separated state; Figure 4 It is Figure 2 a schematic structural diagram of the gear clutch structure in the first engagement state; Figure 5 It is Figure 2 a schematic structural diagram of the gear clutch structure in the second engagement state; Figure 6 It is Figure 2 a schematic structural diagram of the gear clutch structure in the third engagement state; Figure 7 It is Figure 2 a schematic structural diagram of the gear clutch structure in the fourth engagement state.

[0051] This embodiment provides a gear clutch structure, which includes a driving gear 1 and a driven gear 2. The driving gear 1 includes driving teeth 11 with the number of teeth z1, and the driven gear 2 includes driven teeth 21 with the number of teeth z2. The number of engaged teeth between the driving gear 1 and the driven gear 2 is n. z1 is an integer multiple of n, z2 is an integer multiple of n, and the relationship between z2 and z1 is: z2 = nz / z1;

[0052] Wherein: z is the total number of teeth of the driving gear 1 and the driven gear 2, z is a composite number, n is a factor of z, 3 ≤ n < z, and n is divisible by 360. At least one of z1 and z2 is less than z;

[0053] One of the driving teeth 11 and the driven teeth 21 is evenly distributed circumferentially, and one of the driving teeth 11 and the driven teeth 21 is divided into a first tooth groups. a = z1 / n, or a = z2 / n. The interval between two adjacent teeth in the same first tooth group is (360 / n)°;

[0054] The other of the driving teeth 11 and the driven teeth 21 is divided into n second tooth groups 2a, and each second tooth group 2a includes b adjacent teeth, b = z1 / n, or b = z2 / n;

[0055] Any tooth at the same position in any of the second tooth groups 2a can mesh with a tooth in any of the first tooth groups. In the meshing state, there is a distance of twice the tooth thickness between one of the teeth in the second tooth group 2a other than the meshing teeth and one of the teeth in one of the first tooth groups, and among the two teeth with a distance of twice the tooth thickness, the driving tooth 11 is located behind the driven tooth 21.

[0056] It should be noted that the complete number of teeth of the driving gear 1 here refers to the number of driving teeth 11 in the driving gear 1 when the driving teeth 11 are evenly distributed circumferentially and there is a tooth thickness between adjacent driving teeth 11; similarly, the complete number of teeth of the driven gear 2 refers to the number of driven teeth 21 in the driven gear 2 when the driven teeth 21 are evenly distributed circumferentially and there is a tooth thickness between adjacent driven teeth 21. The complete number of teeth of the driving gear 1 and the complete number of teeth of the driven gear 2 are the same.

[0057] It should also be noted that if a driving tooth 11 rotates in the direction of approaching a driven tooth 21 along the rotation direction of the driving gear 1, then it is defined that the driving tooth 11 is located behind the driven tooth 21.

[0058] It should also be noted that the tooth thickness mentioned here is both the tooth thickness of the driving tooth 11 and the tooth thickness of the driven tooth 21. The tooth thickness is usually the pitch circle tooth thickness of the driving tooth 11 or the driven tooth 21.

[0059] Taking the complete number of teeth of the driving gear 1 and the driven gear 2 as 24 as an example, the factors of 24 that are not less than 3, less than 24, and divisible by 360 include 3, 4, 6, 8, 12. Therefore, in some embodiments, the number of meshing teeth n = 3. Under the conditions that z1 is an integer multiple of n, z2 is an integer multiple of n, and z2 = nz / z1, z1 and z2 can be:

[0060] z1 = 3, z2 = 24;

[0061] z1 = 6, z2 = 12;

[0062] z1 = 12, z2 = 6;

[0063] z1 = 24; z2 = 3.

[0064] Taking z1 = 6 and z2 = 12 as an example for explanation, for Figures 4 - 7 understanding, the driving gear 1 includes the number of driving teeth 11 z1 = 6, and the driving teeth 11 are evenly distributed circumferentially. The driven gear 2 includes the number of driven teeth 21 z2 = 12. The number of meshing teeth n of the driving gear 1 and the driven gear 2 is 3. The driving teeth are evenly divided into two first tooth groups, and the adjacent two teeth in the same first tooth group are spaced 120°. From Figure 4It can be seen that the three driving teeth 11 connected by the blue triangle form a first tooth group, and the three driving teeth 11 connected by the yellow triangle form a first tooth group;

[0065] From Figure 4 It can be seen that with the three red dotted lines as the boundaries, the driven teeth are evenly divided into three second tooth groups 2a. Each second tooth group 2a includes 4 adjacent teeth. Define the two adjacent driving teeth 11 in the two first tooth groups as the first driving tooth 11a and the second driving tooth 11b respectively. The driven teeth 21 in each second tooth group 2a include the first driven tooth 21a, the second driven tooth 21b, the third driven tooth 21c, and the fourth driven tooth 21d arranged in sequence along the circumferential direction. The teeth at the same position in any one of the second tooth groups 2a can mesh with the teeth in any one of the first tooth groups. That is to say, the gear clutch structure includes four meshing states. Specifically:

[0066] As Figure 4 shown, in the first meshing state, the second driving tooth 11b meshes with the third driven tooth 21c. Figure 4 Among them, the three driving teeth 11 connected by the yellow triangle mesh with the driven gear 2, and there is a distance of twice the tooth thickness between the first driven tooth 21a and the first driving tooth 11a located behind it.

[0067] Thus, starting from Figure 4 the meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of one tooth, when meshing, the first driving tooth 11a meshes with the first driven tooth 21a, and the driving gear 1 and the driven gear 2 are in the second meshing state as shown in Figure 5 .

[0068] As Figure 5 shown, in the second meshing state, the first driving tooth 11a meshes with the first driven tooth 21a. Figure 5 Among them, the three driving teeth 11 connected by the blue triangle mesh with the driven gear 2, and there is a distance of twice the tooth thickness between the fourth driven tooth 21d and the second driving tooth 11b located behind it.

[0069] Thus, starting from Figure 4 the meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of two teeth, when meshing, the second driving tooth 11b meshes with the fourth driven tooth 21d, and the driving gear 1 and the driven gear 2 are in the third meshing state as shown in Figure 6 .

[0070] As Figure 6 shown, in the third meshing state, the second driving tooth 11b meshes with the fourth driven tooth 21d. Figure 6The three driving teeth 11 connected by the yellow triangle in the middle mesh with the driven gear 2, and there is a distance of twice the tooth thickness between the second driven tooth 21b and the first driving tooth 11a behind it.

[0071] Thus, starting from Figure 4 the meshing state, if in the separated state, when the driving gear 1 rotates relative to the driven gear 2 by an angle of three teeth, when meshing, the first driving tooth 11a and the second driven tooth 21b mesh, and the driving gear 1 and the driven gear 2 are in the fourth meshing state as Figure 7 shown.

[0072] As Figure 7 shown, in the fourth meshing state, the first driving tooth 11a and the second driven tooth 21b mesh, Figure 7 the three driving teeth 11 connected by the blue triangle in the middle mesh with the driven gear 2, and there is a distance of twice the tooth thickness between the third driven tooth 21c and the first driving tooth 11a behind it.

[0073] Thus, starting from Figure 4 the meshing state, if in the separated state, when the driving gear 1 rotates relative to the driven gear 2 by an angle of four teeth, when meshing, the driving gear 1 and the driven gear 2 will return to the first meshing state as Figure 4 shown to achieve a cycle.

[0074] It can be seen from this that in the separated state of the driving gear 1 and the driven gear 2, no matter how the driving gear 1 rotates relative to the driven gear 2 by any angle, they can mesh with each other, ensuring that the gear clutch structure can normally perform the clutch function.

[0075] To sum up, in the gear clutch structure of this embodiment, a tooth reduction design is carried out on the driving gear 1 and / or the driven gear 2. The driving gear 1 and the driven gear 2 are meshed only through n teeth (instead of complete teeth). Each second tooth group 2a only needs a single tooth to align with the tooth of the first tooth group, reducing the phenomenon of tooth collision or jamming caused by multi-tooth alignment, avoiding tooth profile damage, reducing the machining accuracy of the driving gear 1 and / or the driven gear 2, making the driving gear 1 and / or the driven gear 2 easy to machine and form, reducing the production cost of the driving gear 1 and / or the driven gear 2, and improving the production efficiency of the driving gear 1 and / or the driven gear 2; moreover, no matter how the driving gear 1 rotates relative to the driven gear 2 by any angle, they can mesh with each other, ensuring that the gear clutch structure can normally perform the clutch function; each second tooth group 2a meshes with the tooth of the first tooth group through one tooth, ensuring that the meshing points are evenly distributed on the circumference and improving the transmission smoothness.

[0076] It can also be seen from the above description that the number of teeth included in each second tooth group 2a is the number of meshing states of the gear clutch structure.

[0077] In the above embodiments, the number of engaged teeth n is 3. In some other embodiments, the number of engaged teeth n can also be 4. Under the conditions that z1 is an integer multiple of n, z2 is an integer multiple of n, and z2 = nz / z1, z1 and z2 can be:

[0078] z1 = 4, z2 = 24;

[0079] z1 = 8, z2 = 12;

[0080] z1 = 12, z2 = 8;

[0081] z1 = 24; z2 = 4.

[0082] Of course, on the premise of ensuring the smooth transmission of the driving gear 1 and the driven gear 2, the fewer the number of engaged teeth of the driving gear 1 and the driven gear 2, the more the phenomenon of tooth collision or jamming can be reduced, and the tooth profile damage can be avoided. Therefore, usually in the design, the number of engaged teeth n is selected as the smallest number among the factors of z that are not less than 3.

[0083] Further, in some embodiments of the present application, the number of the first tooth groups is two, b is an even number greater than 2, the teeth in the second tooth group 2a are symmetrically arranged about the circumferential center line L1 of the second tooth group 2a, there is a tooth thickness distance between the two teeth closest to the circumferential center line L1, there is a three-tooth-thickness distance between two adjacent teeth on the same side of the circumferential center line L1, and there is a five-tooth-thickness distance between the two closest teeth in two adjacent second tooth groups 2a.

[0084] Take Figure 4 as an example, the number of the first tooth groups is two, that is, a = 2, each second tooth group 2a includes four adjacent teeth, the first driven tooth 21a and the second driven tooth 21b are on one side of the circumferential center line L1, the third driven tooth 21c and the fourth driven tooth 21d are on the other side of the circumferential center line L1, the first driven tooth 21a and the fourth driven tooth 21d are symmetrically arranged about the circumferential center line L1, the second driven tooth 21b and the third driven tooth 21c are symmetrically arranged about the circumferential center line L1, there is a tooth thickness distance between the second driven tooth 21b and the third driven tooth 21c, there is a three-tooth-thickness distance between the first driven tooth 21a and the second driven tooth 21b, there is a three-tooth-thickness distance between the third driven tooth 21c and the fourth driven tooth 21d, and there is a five-tooth-thickness distance between the two closest teeth in two adjacent second tooth groups 2a, that is, the two teeth closest to the red dividing line.

[0085] There is a distance of three times the tooth thickness between the first driven tooth 21a and the second driven tooth 21b. That is to say, compared with a complete tooth, one driven tooth 21 is subtracted between the first driven tooth 21a and the second driven tooth 21b; there is a distance of three times the tooth thickness between the third driven tooth 21c and the fourth driven tooth 21d. That is to say, compared with a complete tooth, one driven tooth 21 is subtracted between the third driven tooth 21c and the fourth driven tooth 21d; there is a distance of five times the tooth thickness between the two teeth closest to the red demarcation line. That is to say, compared with a complete tooth, two driven teeth 21 are subtracted between the two teeth closest to the red demarcation line.

[0086] In this way, the gear clutch structure has the four meshing states as described above, so that the driving gear 1 and the driven gear 2 can mesh with each other no matter how many degrees the driving gear 1 rotates relative to the driven gear 2, ensuring that the gear clutch structure can normally perform the clutch function.

[0087] In an embodiment of the present application, b = 4, and there is a distance of seven times the tooth thickness between two adjacent teeth in the two adjacent first tooth groups that are close to each other.

[0088] Specifically Figure 4 In the shown embodiment, there is a distance of seven times the tooth thickness between two adjacent teeth in the two adjacent first tooth groups that are close to each other, that is, there is a distance of seven times the tooth thickness between the first driving tooth 11a and the second driving tooth 11b. Since each driving tooth 11 is evenly distributed, that is to say, there is a distance of seven times the tooth thickness between two adjacent driving teeth 11. Compared with a complete tooth, three driving teeth 11 are subtracted between two adjacent driving teeth 11.

[0089] Please refer to Figures 8 - 13 , Figure 8 which is a schematic structural diagram of the second specific embodiment of the gear clutch structure provided by the present application in the first meshing state; Figure 9 is Figure 8 a schematic structural diagram of the gear clutch structure in the second meshing state; Figure 10 is Figure 8 a schematic structural diagram of the gear clutch structure in the third meshing state; Figure 11 is Figure 8 a schematic structural diagram of the gear clutch structure in the fourth meshing state; Figure 12 is Figure 8 a schematic structural diagram of the gear clutch structure in the fifth meshing state; Figure 13 is Figure 8 a schematic structural diagram of the gear clutch structure in the sixth meshing state

[0090] In this embodiment, the complete number of teeth of the driving gear 1 and the driven gear 2 is 36. The factors of 36 that are not less than 3, less than 36, and divisible by 360 include 3, 4, 6, 9, 12, 18. Therefore, in some embodiments, the number of meshing teeth n = 3. Under the conditions that z1 is an integer multiple of n, z2 is an integer multiple of n, and z2 = nz / z1, z1 and z2 can be:

[0091] z1 = 3, z2 = 36;

[0092] z1 = 6, z2 = 18;

[0093] z1 = 9, z2 = 12;

[0094] z1 = 12, z2 = 9;

[0095] z1 = 18; z2 = 6;

[0096] z1 = 36; z2 = 3.

[0097] Taking z1 = 6, z2 = 18 as an example for illustration, combined with Figures 8 - 13 Understand that the driving gear 1 includes the driving teeth 11 with the number of teeth z1 = 6, and the driving teeth 11 are evenly distributed along the circumferential direction. The driven gear 2 includes the driven teeth 21 with the number of teeth z2 = 18. The number of meshing teeth n = 3 between the driving gear 1 and the driven gear 2. The driving teeth are evenly divided into two first tooth groups. The angle between two adjacent teeth in the same first tooth group is 120°. It can be Figure 8 seen that the three driving teeth 11 connected by blue triangles form a first tooth group, and the three driving teeth 11 connected by red triangles form a first tooth group;

[0098] From Figure 8It can be seen that, bounded by three red dotted lines, the driven teeth are evenly divided into three second tooth groups 2a, and each second tooth group 2a includes 6 adjacent teeth. Define two adjacent driving teeth 11 in the two first tooth groups as the first driving tooth 11a and the second driving tooth 11b respectively. The driven teeth 21 in each second tooth group 2a include a first driven tooth 21a, a second driven tooth 21b, a third driven tooth 21c, a fourth driven tooth 21d, a fifth driven tooth 21e, and a sixth driven tooth 21f arranged in sequence along the circumferential direction. The first driven tooth 21a, the second driven tooth 21b, and the third driven tooth 21c are located on one side of the circumferential center line L1, and the fourth driven tooth 21d, the fifth driven tooth 21e, and the sixth driven tooth 21f are located on the other side of the circumferential center line L1. The first driven tooth 21a and the sixth driven tooth 21f are symmetrically arranged with respect to the circumferential center line L1. The second driven tooth 21b and the fifth driven tooth 21e are symmetrically arranged with respect to the circumferential center line L1. The third driven tooth 21c and the fourth driven tooth 21d are symmetrically arranged with respect to the circumferential center line L1. There is a distance of three tooth thicknesses between the first driven tooth 21a and the second driven tooth 21b. There is a distance of three tooth thicknesses between the second driven tooth 21b and the third driven tooth 21c. There is a distance of one tooth thickness between the third driven tooth 21c and the fourth driven tooth 21d. There is a distance of three tooth thicknesses between the fourth driven tooth 21d and the fifth driven tooth 21e. There is a distance of three tooth thicknesses between the fifth driven tooth 21e and the sixth driven tooth 21f. There is a distance of five tooth thicknesses between the two teeth closest to the red dividing line.

[0099] The gear clutch structure includes six meshing states. Specifically:

[0100] As Figure 8 shown, in the first meshing state, the second driving tooth 11b and the fourth driven tooth 21d are meshed, Figure 8 and the three driving teeth 11 connected by the blue triangle in

[0101] are meshed with the driven gear 2. There is a distance of two tooth thicknesses between the first driven tooth 21a and the first driving tooth 11a located behind it. Figure 8 Thus, starting from Figure 9 this meshing state, if in the separated state, the driving gear 1 rotates by an angle of one tooth relative to the driven gear 2, when meshing, the first driving tooth 11a and the first driven tooth 21a are meshed, and the driving gear 1 and the driven gear 2 are in the second meshing state as shown in

[0102] As Figure 9 shown, in the second meshing state, the first driving tooth 11a and the first driven tooth 21a are meshed, Figure 9 and the three driving teeth 11 connected by the red triangle in

[0103] Thus, starting from the Figure 8 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of two teeth, when meshing, the second driving tooth 11b and the fifth driven tooth 21e are meshed, and the driving gear 1 and the driven gear 2 are in the Figure 10 third meshing state as shown.

[0104] As Figure 10 shown, in the third meshing state, the second driving tooth 11b and the fifth driven tooth 21e are meshed, Figure 10 and the three driving teeth 11 connected by the blue triangle in the figure are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the second driven tooth 21b and the first driving tooth 11a located behind it.

[0105] Thus, starting from the Figure 8 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of three teeth, when meshing, the first driving tooth 11a and the second driven tooth 21b are meshed, and the driving gear 1 and the driven gear 2 are in the Figure 11 fourth meshing state as shown.

[0106] As Figure 11 shown, in the fourth meshing state, the first driving tooth 11a and the second driven tooth 21b are meshed, Figure 11 and the three driving teeth 11 connected by the red triangle in the figure are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the sixth driven tooth 21f and the second driving tooth 11b located behind it.

[0107] Thus, starting from the Figure 8 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of four teeth, when meshing, the second driving tooth 11b and the sixth driven tooth 21f are meshed, and the driving gear 1 and the driven gear 2 are in the Figure 12 fifth meshing state as shown.

[0108] As Figure 12 shown, in the fifth meshing state, the second driving tooth 11b and the sixth driven tooth 21f are meshed, Figure 12 and the three driving teeth 11 connected by the blue triangle in the figure are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the third driven tooth 21c and the first driving tooth 11a located behind it.

[0109] Thus, starting from the Figure 8 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of five teeth, when meshing, the first driving tooth 11a and the third driven tooth 21c are meshed, and the driving gear 1 and the driven gear 2 are in the Figure 13 sixth meshing state as shown.

[0110] As shown Figure 13 in the sixth meshing state, the first driving tooth 11a meshes with the third driven tooth 21c, Figure 13 and the three driving teeth 11 connected by the red triangle in the figure mesh with the driven gear 2. There is a distance of twice the tooth thickness between the fourth driven tooth 21d and the first driving tooth 11a located behind it.

[0111] Thus, starting from Figure 8 the meshing state, if in the separated state, the driving gear 1 rotates by an angle of six teeth relative to the driven gear 2, when meshing, the driving gear 1 and the driven gear 2 will return to Figure 8 the first meshing state as shown in the figure to achieve a cycle.

[0112] It can be seen that when the teeth in the second tooth group 2a are arranged as above, in the separated state, no matter how the driving gear 1 rotates relative to the driven gear 2 by any angle, they can mesh with each other, ensuring that the gear clutch structure can normally perform the clutch function.

[0113] In this embodiment, b = 6, and there is a distance of eleven times the tooth thickness between two adjacent teeth in the first tooth group that are close to each other, that is, there is a distance of eleven times the tooth thickness between the first driving tooth 11a and the second driving tooth 11b. Since the driving teeth 11 are evenly distributed, that is to say, there is a distance of eleven times the tooth thickness between two adjacent driving teeth 11. Compared with the complete teeth, five driving teeth 11 are removed between two adjacent driving teeth 11.

[0114] Please refer to Figures 14 - 17 , Figure 14 which is a schematic structural diagram of the third specific embodiment of the gear clutch structure provided by the present application in the first meshing state; Figure 15 is Figure 14 a schematic structural diagram of the gear clutch structure in the second meshing state; Figure 16 is Figure 14 a schematic structural diagram of the gear clutch structure in the third meshing state; Figure 17 is Figure 14 a schematic structural diagram of the gear clutch structure in the fourth meshing state.

[0115] Furthermore, in some embodiments of the present application, a = b, a > 3, b > 3. The distance between two adjacent teeth in the second tooth group 2a is equal. The distance between two adjacent teeth in the second tooth group 2a is two times the tooth thickness larger than the distance between two adjacent teeth in the first tooth group that are close to each other. There is a distance of one tooth thickness between the two closest teeth in two adjacent second tooth groups 2a.

[0116] Specifically, when a = b = 4, the distance between two adjacent teeth in the second tooth group 2a is nine times the tooth thickness, the distance between two adjacent teeth in the first tooth group is seven times the tooth thickness, and the distance between the two closest teeth in two adjacent second tooth groups 2a is one tooth thickness.

[0117] Combined with Figures 14 - 17 Understand that the complete number of teeth of the driving gear 1 and the driven gear 2 is 48. The factors of 48 that are not less than 3, less than 48, and divisible by 360 include 3, 4, 6, 8, 12, 16, 24. Therefore, in some embodiments, the number of meshing teeth n = 3. Under the condition that z1 is an integer multiple of n, z2 is an integer multiple of n, and z2 = nz / z1, z1 and z2 can be:

[0118] z1 = 3, z2 = 48;

[0119] z1 = 6, z2 = 24;

[0120] z1 = 9, z2 = 16;

[0121] z1 = 12; z2 = 12;

[0122] z1 = 24; z2 = 6;

[0123] z1 = 48; z2 = 3.

[0124] Taking z1 = 12, z2 = 12 as an example for illustration, combined with Figures 14 - 17 Understand that the driving gear 1 includes the driving teeth 11 with the number of teeth z1 = 12, and the driving teeth 11 are evenly distributed circumferentially. The driven gear 2 includes the driven teeth 21 with the number of teeth z2 = 12. The number of meshing teeth n of the driving gear 1 and the driven gear 2 is 3. The driving teeth are evenly divided into four first tooth groups. The angle between two adjacent teeth in the same first tooth group is 120°. It can be seen from Figure 14 that the three driving teeth 11 connected by the blue triangle are a first tooth group, the three driving teeth 11 connected by the red triangle are a first tooth group, the three driving teeth 11 connected by the black triangle are a first tooth group, and the three driving teeth 11 connected by the yellow triangle are a first tooth group.

[0125] It can be seen from Figure 14 that taking the three black dotted lines as the boundaries, the driven teeth are evenly divided into three second tooth groups 2a, and each second tooth group 2a includes four adjacent teeth. Define the four adjacent driving teeth 11 in the four first tooth groups as the first driving tooth 11a, the second driving tooth 11b, the third driving tooth 11c, and the fourth driving tooth 11d respectively. The driven teeth 21 in each second tooth group 2a include the first driven tooth 21a, the second driven tooth 21b, the third driven tooth 21c, and the fourth driven tooth 21d arranged in sequence circumferentially.

[0126] The distance between the first driven tooth 21a and the second driven tooth 21b is nine times the tooth thickness, that is, compared with the state where the driven gear 2 has complete teeth, four teeth are subtracted between the first driven tooth 21a and the second driven tooth 21b. The distance between the second driven tooth 21b and the third driven tooth 21c is nine times the tooth thickness, that is, compared with the state where the driven gear 2 has complete teeth, four teeth are subtracted between the second driven tooth 21b and the third driven tooth 21c. The distance between the third driven tooth 21c and the fourth driven tooth 21d is nine times the tooth thickness, that is, compared with the state where the driven gear 2 has complete teeth, four teeth are subtracted between the third driven tooth 21c and the fourth driven tooth 21d.

[0127] The distance between two adjacent driving teeth 11 is seven times the tooth thickness, that is, compared with the state where the driving gear 1 has complete teeth, three teeth are subtracted between two adjacent driving teeth 11. The distance between two adjacent teeth in the second tooth group 2a is two times the tooth thickness larger than the distance between two adjacent teeth in the first tooth group. The distance between the two teeth closest to the dotted line, that is, the two closest teeth in two adjacent second tooth groups 2a, is one tooth thickness.

[0128] Thus, the gear clutch structure includes four meshing states, specifically:

[0129] As Figure 14 shown, in the first meshing state, the first driving tooth 11a and the first driven tooth 21a are meshed. Figure 14 The three driving teeth 11 connected by the blue triangle in

[0130] are meshed with the driven gear 2. There is a distance of two tooth thicknesses between the second driven tooth 21b and the second driving tooth 11b located behind it. Figure 14 Figure 15 Starting from this meshing state, if in the separated state, the driving gear 1 rotates by an angle of one tooth relative to the driven gear 2, when meshing, the second driving tooth 11b and the second driven tooth 21b are meshed, and the driving gear 1 and the driven gear 2 are in the second meshing state as shown in Figure 15

[0131] As Figure 15 shown, in the second meshing state, the second driving tooth 11b and the second driven tooth 21b are meshed. Figure 15 The three driving teeth 11 connected by the red triangle in

[0132] are meshed with the driven gear 2. There is a distance of two tooth thicknesses between the third driven tooth 21c and the third driving tooth 11c located behind it. Figure 14 Starting from this meshing state, if in the separated state, the driving gear 1 rotates by an angle of two teeth relative to the driven gear 2, when meshing, the third driving tooth 11c and the third driven tooth 21c are meshed, and the driving gear 1 and the driven gear 2 are in the state as shown in Figure 16The third meshing state shown.

[0133] As Figure 16 shown, in the third meshing state, the third driving tooth 11c and the third driven tooth 21c are meshed. Figure 16 Among them, the three driving teeth 11 connected by the black triangle are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the fourth driven tooth 21d and the fourth driving tooth 11d located behind it.

[0134] Thus, starting from Figure 14 the meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of three teeth, when meshing, the fourth driving tooth 11d and the fourth driven tooth 21d are meshed, and the driving gear 1 and the driven gear 2 are in the Figure 17 fourth meshing state shown.

[0135] As Figure 17 shown, in the fourth meshing state, the fourth driving tooth 11d and the fourth driven tooth 21d are meshed. Figure 17 Among them, the three driving teeth 11 connected by the yellow triangle are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the first driving tooth 11a and the driving tooth 11 located behind it.

[0136] Thus, starting from Figure 14 the meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle of four teeth, when meshing, the driving gear 1 and the driven gear 2 will return to the Figure 14 first meshing state shown to achieve a cycle.

[0137] It can be seen from this that when a = b and the teeth in the second tooth group 2a are arranged as above, when the driving gear 1 rotates relative to the driven gear 2 by an angle of one tooth, the teeth in the second tooth group 2a will sequentially mesh with one of the teeth in the first tooth group, ensuring that the gear clutch structure can normally perform the clutch function.

[0138] Please refer to Figures 18 - 21 , Figure 18 which is a schematic structural diagram of the fourth specific embodiment of the gear clutch structure provided by this application in the first meshing state; Figure 19 is Figure 18 a schematic structural diagram of the gear clutch structure in the second meshing state; Figure 20 is Figure 18 a schematic structural diagram of the gear clutch structure in the third meshing state; Figure 21 is Figure 18 a schematic structural diagram of the gear clutch structure in the fourth meshing state.

[0139] In an embodiment of the present application, a = 3, b = 4. The second tooth group 2a includes a first tooth, a second tooth, a third tooth, and a fourth tooth arranged in sequence. There is a distance of three times the tooth thickness between the first tooth and the second tooth, a distance of five times the tooth thickness between the second tooth and the third tooth, a distance of three times the tooth thickness between the third tooth and the fourth tooth, a distance of nine times the tooth thickness between the two closest teeth in two adjacent second tooth groups 2a, and a distance of seven times the tooth thickness between the two approaching teeth in two adjacent first tooth groups.

[0140] Combined with Figures 18 - 21 Understand that the total number of teeth of the driving gear 1 and the driven gear 2 is 36. The factors of 36 that are not less than 3, less than 36, and divisible by 360 include 3, 4, 6, 9, 12, 18. Therefore, in some embodiments, the number of meshing teeth n = 3. Under the conditions that z1 is an integer multiple of n, z2 is an integer multiple of n, and z2 = nz / z1, z1 and z2 can be:

[0141] z1 = 3, z2 = 36;

[0142] z1 = 6, z2 = 18;

[0143] z1 = 9, z2 = 12;

[0144] z1 = 12, z2 = 9;

[0145] z1 = 18; z2 = 6;

[0146] z1 = 36; z2 = 3.

[0147] Taking z1 = 9, z2 = 12 as an example for illustration, the driving gear 1 includes the driving teeth 11 with the number of teeth z1 = 9, and the driving teeth 11 are evenly distributed circumferentially. The driven gear 2 includes the driven teeth 21 with the number of teeth z2 = 12. The number of meshing teeth n of the driving gear 1 and the driven gear 2 is 3. The driving teeth are evenly divided into three first tooth groups. The angle between two adjacent teeth in the same first tooth group is 120°. From Figure 18 It can be seen that the three driving teeth 11 connected by blue triangles form a first tooth group, the three driving teeth 11 connected by red triangles form a first tooth group, and the three driving teeth 11 connected by black triangles form a first tooth group.

[0148] From Figure 18 It can be seen that bounded by three dotted lines, the driven teeth are evenly divided into three second tooth groups 2a. Each second tooth group 2a includes four adjacent teeth. Define the three adjacent driving teeth 11 in the three first tooth groups as the first driving tooth 11a, the second driving tooth 11b, and the third driving tooth 11c respectively. The driven teeth 21 in each second tooth group 2a include the first driven tooth 21a, the second driven tooth 21b, the third driven tooth 21c, and the fourth driven tooth 21d arranged in sequence circumferentially.

[0149] There is a distance of three times the tooth thickness between the first driven tooth 21a and the second driven tooth 21b, that is, compared with the state where the driven gear 2 has complete teeth, one tooth is subtracted between the first driven tooth 21a and the second driven tooth 21b; there is a distance of five times the tooth thickness between the second driven tooth 21b and the third driven tooth 21c, that is, compared with the state where the driven gear 2 has complete teeth, two teeth are subtracted between the second driven tooth 21b and the third driven tooth 21c; there is a distance of three times the tooth thickness between the third driven tooth 21c and the fourth driven tooth 21d, that is, compared with the state where the driven gear 2 has complete teeth, one tooth is subtracted between the third driven tooth 21c and the fourth driven tooth 21d.

[0150] There is a distance of nine times the tooth thickness between the two closest teeth in adjacent two second tooth groups 2a, that is, there is a distance of nine times the tooth thickness between the two teeth closest to the dotted line in the figure. Compared with the state where the driven gear 2 has complete teeth, four teeth are subtracted between the two closest teeth in adjacent two second tooth groups 2a.

[0151] There is a distance of seven times the tooth thickness between adjacent two driving teeth 11, that is, compared with the state where the driving gear 1 has complete teeth, three teeth are subtracted between adjacent two driving teeth 11.

[0152] Thus, the gear clutch structure includes four meshing states, specifically:

[0153] As Figure 18 shown, in the first meshing state, the second driving tooth 11b and the second driven tooth 21b are meshed, Figure 18 the three driving teeth 11 connected by the blue triangle in the figure are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the fourth driven tooth 21d and the third driving tooth 11c located behind it.

[0154] Thus, starting from Figure 18 this meshing state, if in the separated state, the driving gear 1 rotates by an angle of one tooth relative to the driven gear 2, when meshing, the third driving tooth 11c and the fourth driven tooth 21d are meshed, and the driving gear 1 and the driven gear 2 are in the second meshing state as Figure 19 shown.

[0155] As Figure 19 shown, in the second meshing state, the third driving tooth 11c and the fourth driven tooth 21d are meshed, Figure 19 the three driving teeth 11 connected by the red triangle in the figure are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the first driven tooth 21a and the first driving tooth 11a located behind it.

[0156] Thus, starting from Figure 18Starting from the meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle corresponding to two teeth, when meshing, the first driving tooth 11a and the first driven tooth 21a are meshed, and the driving gear 1 and the driven gear 2 are in the third meshing state as shown in Figure 20 shown.

[0157] As shown in Figure 20 shown, in the third meshing state, the first driving tooth 11a and the first driven tooth 21a are meshed, Figure 20 and the three driving teeth 11 connected by the black triangle in it are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the third driven tooth 21c and the second driving tooth 11b located behind it.

[0158] Thus, starting from the Figure 18 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle corresponding to three teeth, when meshing, the second driving tooth 11b and the third driven tooth 21c are meshed, and the driving gear 1 and the driven gear 2 are in the fourth meshing state as shown in Figure 21 shown.

[0159] As shown in Figure 21 shown, in the fourth meshing state, the second driving tooth 11b and the third driven tooth 21c are meshed, Figure 21 and the three driving teeth 11 connected by the blue triangle in it are meshed with the driven gear 2, and there is a distance of twice the tooth thickness between the second driven tooth 21b and the first driving tooth 11a located behind it.

[0160] Thus, starting from the Figure 18 meshing state, if in the separated state, the driving gear 1 rotates relative to the driven gear 2 by an angle corresponding to four teeth, when meshing, the driving gear 1 and the driven gear 2 will return to the first meshing state as shown in Figure 18 shown to achieve a cycle.

[0161] It can be seen that when a = 3, b = 4, and the teeth in the second tooth group 2a are arranged as above, no matter how the driving gear 1 rotates relative to the driven gear 2 by any angle, they can be meshed with each other, ensuring that the gear clutch structure can normally perform the clutch function.

[0162] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A gear clutch structure, characterized in that: The invention comprises a driving gear (1) and a driven gear (2), wherein the number of teeth of the driving teeth (11) of the driving gear (1) is z1, the number of teeth of the driven teeth (21) of the driven gear (2) is z2, the number of meshing teeth of the driving gear (1) and the driven gear (2) is n, z1 is an integer multiple of n, z2 is an integer multiple of n, and the relationship between z2 and z1 is: z2=nz / z1; Wherein: z is the complete number of teeth of the driving gear (1) and the driven gear (2), z is a composite number, n is a factor of z, 3≤n<z, and n is divisible by 360, and at least one of z1 and z2 is smaller than z; The driving teeth (11) and one of the driven teeth (21) are evenly distributed along the circumferential direction, and the driving teeth (11) and one of the driven teeth (21) are evenly divided into a first tooth groups, a=z1 / n, or a=z2 / n, and the interval between two adjacent teeth in the same first tooth group is (360 / n)°; The other of the driving tooth (11) and the driven tooth (21) is divided into n second tooth groups (2a), each of the second tooth groups (2a) includes b adjacent teeth, b=z1 / n, or b=z2 / n; The teeth at the same position in any group of the second tooth groups (2a) can mesh with the teeth in any of the first tooth groups. In the meshing state, a distance of twice the tooth thickness exists between one of the teeth in the second tooth group (2a) other than the meshing teeth and one of the teeth in the first tooth group, and of the two teeth having a distance of twice the tooth thickness, the active tooth (11) is located at the rear side of the driven tooth (21).

2. The gear clutch structure according to claim 1, characterized in that: n is the smallest factor of z that is not less than 3.

3. The gear clutch structure according to claim 1 or 2, characterized in that: a=2, b is an even number greater than 2, the teeth in the second tooth group (2a) are symmetrically arranged about the circumferential center line (L1) of the second tooth group (2a), the distance between the two teeth closest to the circumferential center line (L1) is one tooth thickness, the distance between two adjacent teeth on the same side of the circumferential center line (L1) is three times the tooth thickness, and the distance between two adjacent teeth closest to each other in the second tooth group (2a) is five times the tooth thickness.

4. The gear clutch structure according to claim 3, characterized in that: b=4, the distance between two adjacent teeth in the first tooth group that are close to each other is seven times the tooth thickness.

5. The gear clutch structure according to claim 3, characterized in that: b=6, the distance between two teeth close to each other in two adjacent teeth of the first tooth groups is eleven times the tooth thickness.

6. The gear clutch structure according to claim 1 or 2, characterized in that: a=b, a>3, b>3, the distance between two adjacent teeth in the second tooth group (2a) is equal, the distance between two adjacent teeth in the second tooth group (2a) is greater than the distance between two adjacent teeth close to each other in the first tooth group by twice the tooth thickness, and the distance between the two closest teeth in the second tooth group (2a) is one tooth thickness.

7. The gear clutch structure according to claim 6, characterized in that: a=b=4, the distance between two adjacent teeth in the second tooth group (2a) is nine times the tooth thickness, the distance between two adjacent teeth in the first tooth group is seven times the tooth thickness, and the distance between two adjacent teeth closest to each other in the second tooth group (2a) is one tooth thickness.

8. The gear clutch structure according to claim 1 or 2, characterized in that: a=3, b=4, the second tooth group (2a) comprises a first tooth, a second tooth, a third tooth and a fourth tooth arranged in sequence, the first tooth and the second tooth have a distance of three times the tooth thickness, the second tooth and the third tooth have a distance of five times the tooth thickness, the third tooth and the fourth tooth have a distance of three times the tooth thickness, the two closest teeth in two adjacent second tooth groups (2a) have a distance of nine times the tooth thickness, and the two adjacent teeth in two adjacent first tooth groups have a distance of seven times the tooth thickness.

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