Gear clutch structure

Abstract

The invention relates to the technical field of clutches, and discloses a gear clutch structure, the tooth number of driving teeth is z1, the tooth number of driven teeth is z2, the tooth number of meshing teeth is n, and z2 = nz / z1; one of the driving teeth and the driven teeth is uniformly distributed in the circumferential direction and is uniformly divided into a first tooth groups, and the interval between two adjacent teeth in the same first tooth group is 360 / n degrees; the other tooth group is divided into n second tooth groups, and each second tooth group comprises b adjacent teeth; teeth, at the same position, of any group in each second tooth group can be meshed with teeth in any first tooth group, in the meshed state, the distance of two times of the tooth thickness exists between one tooth, except the meshed teeth, in each second tooth group and one tooth in one first tooth group, and in the two teeth with the distance of two times of the tooth thickness, the tooth thickness of the tooth is larger than that of the tooth in the first tooth group. The driving teeth are located on the rear sides of the driven teeth. Through the tooth reduction design, the problems of tooth collision and tooth clamping are solved, the driving gear can be meshed with the driven gear when rotating by any angle relative to the driven gear, and the clutch function is normally achieved.

Description

Technical Field

[0001] The present application relates to the technical field of clutches, and in particular to a gear clutch structure. Background Art

[0002] Related art gear clutch 1 'such as Figure 1 As shown, the gear clutch 1' comprises a driving gear 11' and a driven gear 12', wherein 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 coupled, the driving gear 11' drives the driven gear 12' to rotate, and the driving gear 11' achieves engagement or separation with the driven gear 12' by axial movement, thereby achieving a clutch function.

[0003] It can be seen that in the gear clutch 1' of the related art, the driving gear 11' and the driven gear 12' are meshed through all the teeth, and the number of meshing teeth is relatively large. It is easy for the teeth to collide or get stuck during axial meshing, causing damage to the tooth shape and limiting the clutch function; and the processing accuracy requirements of the driving gear 11' and the driven gear 12' are high, and they are not easy to process and shape, which increases production costs and reduces production efficiency. Summary of the invention

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

[0005] In order to solve the above technical problems, the present application provides a gear clutch structure, including a driving gear and a driven gear, wherein the number of teeth of the driving gear including the driving teeth is z1, the number of teeth of the driven gear including the driven teeth is z2, the number of meshing teeth of 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 complete 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] The driving teeth and one of the driven teeth are evenly distributed along the circumferential direction, and the driving teeth and one of the driven teeth are 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)°;

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

[0009] The teeth in the same position of any group in each of the second tooth groups can mesh with the teeth 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 except the meshing teeth and one of the teeth in the first tooth group, and of the two teeth with a distance of twice the tooth thickness, the driving tooth is located on the rear side of the driven tooth.

[0010] The gear clutch structure of the present application is designed with reduced teeth for the driving gear and / or the driven gear. The driving gear and the driven gear are meshed only through n teeth (rather than complete teeth). Each second tooth group only needs a single tooth to be aligned with the teeth of the first tooth group, thereby reducing the phenomenon of tooth collision or tooth jamming caused by multiple tooth alignment, avoiding tooth shape damage, and reducing the processing accuracy of the driving gear and / or the driven gear, so that the driving gear and / or the driven gear are easy to process and form, 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; and no matter how the driving gear rotates relative to the driven gear at any angle, they can mesh with each other, ensuring that the gear clutch structure can perform the clutch function normally; each second tooth group meshes with the teeth of the first tooth group through one tooth, ensuring that the meshing points are evenly distributed on the circumference, thereby improving the transmission stability.

[0011] Optionally, n is the smallest number of 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, and there is a distance of five times the tooth thickness between two adjacent teeth closest to each other in the second tooth group.

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

[0014] Optionally, b=6, and the distance between two adjacent teeth in two adjacent first tooth groups is eleven times the tooth thickness.

[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 twice the distance of the tooth thickness than the distance between two adjacent teeth close to each other in the first tooth group, and the distance between the two closest teeth in the second tooth group is one tooth thickness.

[0016] Optionally, a=b=4, the distance between two adjacent teeth in the second tooth group 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 is one tooth thickness.

[0017] Optionally, a=3, b=4, the second tooth group includes 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 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the gear clutch in a disengaged state;

[0021] Figure 4 for Figure 2 A schematic structural diagram of the gear clutch structure in a first meshing state;

[0022] Figure 5 for Figure 2 A schematic structural diagram of the gear clutch structure in a second meshing state;

[0023] Figure 6 for Figure 2 A schematic structural diagram of the gear clutch structure in a third meshing state;

[0024] Figure 7 for Figure 2 A schematic structural diagram of the gear clutch structure in a fourth meshing state;

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

[0026] Fig. 9 for Figure 8 A schematic structural diagram of the gear clutch structure in a second meshing state;

[0027] Fig.10 for Figure 8A schematic structural diagram of the gear clutch structure in a third meshing state;

[0028] Fig.11 for Figure 8 A schematic structural diagram of the gear clutch structure in a fourth meshing state;

[0029] Fig.12 for Figure 8 A schematic diagram of the structure of the gear clutch in the fifth meshing state;

[0030] Fig.13 for Figure 8 A schematic diagram of the structure of the gear clutch in the sixth meshing state;

[0031] Fig.14 This is a schematic structural diagram of a third specific embodiment of the gear clutch structure provided by the present application in a first meshing state;

[0032] Fig.15 for Fig.14 A schematic structural diagram of the gear clutch structure in a second meshing state;

[0033] Fig.16 for Fig.14 A schematic structural diagram of the gear clutch structure in a third meshing state;

[0034] Fig.17 for Fig.14 A schematic structural diagram of the gear clutch structure in a fourth meshing state;

[0035] Fig.18 This is a schematic structural diagram of a fourth specific embodiment of the gear clutch structure provided by the present application in a first meshing state;

[0036] Fig.19 for Fig.18 A schematic structural diagram of the gear clutch structure in a second meshing state;

[0037] Fig. 20 for Fig.18 A schematic structural diagram of the gear clutch structure in a third meshing state;

[0038] Fig.21 for Fig.18 A schematic structural diagram of the gear clutch structure in a fourth meshing state;

[0039] in, Figure 1 The reference numerals in the figures are as follows:

[0040] 1'-gear clutch; 11'-driving gear; 12'-driven gear;

[0041] in, Figure 2-Figure 21 The reference numerals in the figures are as follows:

[0042] 1-driving gear; 11-driving tooth; 11a-first driving tooth; 11b-second driving tooth; 11c-third driving tooth; 11d-fourth driving tooth;

[0043] 2-driven gear; 21-driven tooth; 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 DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0046] It should be understood that the reference to "some embodiments" throughout the specification means 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" appearing throughout the specification does not necessarily refer to the same embodiment. 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 specified 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 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the gear clutch of related technology, the driving gear and the driven gear are meshed through all the teeth, and the number of meshing teeth is relatively large. It is easy for the teeth to collide or get stuck during axial meshing, causing damage to the tooth shape and limiting the clutch function. In addition, the processing accuracy requirements of the driving gear and the driven gear are high, and they are not easy to process and shape, which increases production costs and reduces production efficiency.

[0049] Since the driving gear and the driven gear need to be constantly engaged or disengaged, if the number of teeth of the driving gear and the driven gear is reduced to solve the problem of tooth collision and tooth jamming, it is necessary to ensure that the driving gear and the driven gear can be engaged no matter how they are rotated to any angle.

[0050] Please refer to Figure 2-Figure 7 , Figure 2 This is a schematic structural diagram of the first specific embodiment of the gear clutch structure provided by the present application in a coupled state; Figure 3 for Figure 2 A schematic diagram of the structure of the gear clutch in a disengaged state; Figure 4 for Figure 2 A schematic structural diagram of the gear clutch structure in a first meshing state; Figure 5 for Figure 2 A schematic structural diagram of the gear clutch structure in a second meshing state; Figure 6 for Figure 2 A schematic structural diagram of the gear clutch structure in a third meshing state; Figure 7 for Figure 2 Structural schematic diagram of the gear clutch structure in the fourth meshing state.

[0051] The present embodiment provides a gear clutch structure, including a driving gear 1 and a driven gear 2, wherein the driving gear 1 includes a driving tooth 11 with a number of teeth z1, the driven gear 2 includes a driven tooth 21 with a number of teeth 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;

[0052] 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 less than z;

[0053] One of the driving teeth 11 and the driven teeth 21 is evenly distributed along the circumferential direction, 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, and the interval between two adjacent teeth in the same first tooth group is (360 / n)°;

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

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

[0056] It should be noted that the complete number of teeth of the driving gear 1 mentioned here refers to the number of teeth of the driving gear 1 when each driving tooth 11 in the driving gear 1 is evenly distributed along the circumferential direction and there is a tooth thickness between two adjacent driving teeth 11; similarly, the complete number of teeth of the driven gear 2 refers to the number of teeth of the driven teeth 21 when each driven tooth 21 in the driven gear 2 is evenly distributed along the circumferential direction and there is a tooth thickness between two 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 along the rotation direction of the driving gear 1 , a driving tooth 11 rotates in a direction close to a driven tooth 21 , it is defined that the driving tooth 11 is located at the rear side of the driven tooth 21 .

[0058] It should also be noted that the tooth thickness mentioned here refers to 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 are not less than 3 and less than 24, and the factors that can be divided by 360 include 3, 4, 6, 8, and 12. 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:

[0060] z1=3,z2=24;

[0061] z1=6, z2=12;

[0062] z1=12, z2=6;

[0063] z1=24;z2=3.

[0064] Take z1=6, z2=12 as an example to illustrate. Figure 4-Figure 7 It is understood that the driving gear 1 includes a driving tooth 11 with a number of teeth z1=6, and each driving tooth 11 is evenly distributed along the circumferential direction. The driven gear 2 includes a driven tooth 21 with a number of teeth z2=12. The number of meshing teeth of the driving gear 1 and the driven gear 2 is n=3. The driving teeth are evenly divided into two first tooth groups. The interval between two adjacent teeth in the same first tooth group is 120°. Figure 4It can be seen that the three active teeth 11 connected by the blue triangle are a first tooth group, and the three active teeth 11 connected by the yellow triangle are a first tooth group;

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

[0066] like Figure 4 As shown, in the first meshing state, the second driving tooth 11b and the third driven tooth 21c are meshed, Figure 4 The three driving teeth 11 connected by the yellow triangle are meshed with the driven gear 2, and the distance between the first driven tooth 21a and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0067] So, Figure 4 The meshing state is the starting point. If the driving gear 1 rotates one tooth angle relative to the driven gear 2 in the disengaged state, 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 state as follows: Figure 5 The second meshing state is shown.

[0068] like Figure 5 As shown, in the second meshing state, the first active tooth 11a and the first driven tooth 21a are meshed, Figure 5 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the fourth driven tooth 21d and the second driving tooth 11b located at the rear thereof have a distance twice the tooth thickness.

[0069] So, Figure 4 The meshing state is the starting point. If the driving gear 1 rotates two teeth relative to the driven gear 2 in the disengaged state, the second driving tooth 11b and the fourth driven tooth 21d are meshed when meshing. The driving gear 1 and the driven gear 2 are in the state as follows: Figure 6 The third meshing state is shown.

[0070] like Figure 6 As shown, in the third meshing state, the second driving tooth 11b and the fourth driven tooth 21d are meshed, Figure 6The three driving teeth 11 connected by the yellow triangle are meshed with the driven gear 2, and the distance between the second driven tooth 21b and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0071] So, Figure 4 The meshing state is the starting point. If the driving gear 1 rotates three teeth relative to the driven gear 2 in the disengaged state, 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 state as follows: Figure 7 The fourth meshing state is shown.

[0072] like Figure 7 As shown, in the fourth meshing state, the first active tooth 11a and the second driven tooth 21b are meshed. Figure 7 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the distance between the third driven tooth 21c and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0073] So, Figure 4 The meshing state is the starting point. If the driving gear 1 rotates four teeth relative to the driven gear 2 in the disengaged state, the driving gear 1 and the driven gear 2 will return to the meshing state. Figure 4 The first meshing state shown completes the cycle.

[0074] It can be seen that when the driving gear 1 and the driven gear 2 are in the separated state, they can mesh with each other regardless of any angle at which the driving gear 1 rotates relative to the driven gear 2, thereby ensuring that the gear clutch structure can normally perform the clutch function.

[0075] In summary, the gear clutch structure of this embodiment is designed with reduced teeth for the driving gear 1 and / or the driven gear 2. The driving gear 1 and the driven gear 2 are meshed only by n teeth (rather than complete teeth). Each second tooth group 2a only needs a single tooth to align with the teeth of the first tooth group, thereby reducing the collision or jamming of teeth caused by multiple teeth alignment, avoiding tooth shape damage, and reducing the processing accuracy of the driving gear 1 and / or the driven gear 2, so that the driving gear 1 and / or the driven gear 2 are easy to process 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; and no matter how the driving gear 1 rotates relative to the driven gear 2 at 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 teeth of the first tooth group through one tooth, ensuring that the meshing points are evenly distributed on the circumference, and improving the transmission stability.

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

[0077] In the above embodiment, the number of meshing teeth n is 3. In some other embodiments, the number of meshing 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, under the premise of ensuring the transmission stability of the driving gear 1 and the driven gear 2, the fewer the meshing teeth of the driving gear 1 and the driven gear 2, the less the collision or jamming of teeth can be, and the damage to the tooth shape can be avoided. Therefore, in the design, the meshing teeth number n is usually selected as the minimum number of factors of z that are not less than 3.

[0083] Further, in some embodiments of the present application, the number of 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, the two teeth closest to the circumferential center line L1 have a distance of one tooth thickness between them, the two adjacent teeth on the same side of the circumferential center line L1 have a distance of three times the tooth thickness between them, and the two closest teeth in two adjacent second tooth groups 2a have a distance of five times the tooth thickness between them.

[0084] by Figure 4 For example, the number of first tooth groups is two, that is, a=2, and each second tooth group 2a includes four adjacent teeth. The first driven tooth 21a and the second driven tooth 21b are located on one side of the circumferential center line L1, and the third driven tooth 21c and the fourth driven tooth 21d are located 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, and the second driven tooth 21b and the third driven tooth 21c are symmetrically arranged about the circumferential center line L1. There is a distance of one tooth thickness between the second driven tooth 21b and the third driven tooth 21c, a distance of three times the tooth thickness between the first driven tooth 21a and the second driven tooth 21b, a distance of three times the tooth thickness between the third driven tooth 21c and the fourth driven tooth 21d, and a distance of five times the tooth thickness between the two closest teeth in the 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, compared with the 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, compared with the 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 dividing line, that is, compared with the complete tooth, two driven teeth 21 are subtracted between the two teeth closest to the red dividing line.

[0086] In this way, the gear clutch structure has the four meshing states as described above, so that the driving gear 1 can mesh with the driven gear 2 at any angle, ensuring that the gear clutch structure can perform the clutch function normally.

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

[0088] Specific to Figure 4 In the embodiment shown, there is a distance of seven times the tooth thickness between two teeth close to each other in two adjacent first tooth groups, that is, there is a distance of seven times the tooth thickness between the first active tooth 11a and the second active tooth 11b. Since the active teeth 11 are evenly distributed, that is, there is a distance of seven times the tooth thickness between two adjacent active teeth 11. Compared with a complete tooth, three active teeth 21 are reduced between two adjacent active teeth 11.

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

[0090] In this embodiment, the number of teeth of the driving gear 1 and the driven gear 2 is 36, the factors of 36 are not less than 3 and less than 36, and the factors divisible by 360 include 3, 4, 6, 9, 12, and 18. 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:

[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] Take z1=6, z2=18 as an example to illustrate. Figure 8-Figure 13 It is understood that the driving gear 1 includes a driving tooth 11 with a tooth number z1=6, and each driving tooth 11 is evenly distributed along the circumferential direction. The driven gear 2 includes a driven tooth 21 with a tooth number z2=18. The number of meshing teeth of the driving gear 1 and the driven gear 2 is n=3. The driving teeth are evenly divided into two first tooth groups. The interval between two adjacent teeth in the same first tooth group is 120°. Figure 8 It can be seen that the three active teeth 11 connected by the blue triangle are a first tooth group, and the three active teeth 11 connected by the red triangle are a first tooth group;

[0098] Depend on Figure 8It can be seen that the driven teeth are divided into three second tooth groups 2a with the three red dotted lines as boundaries, each second tooth group 2a includes 6 adjacent teeth, and the two adjacent active teeth 11 in the two first tooth groups are defined as the first active tooth 11a and the second active 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, the fourth driven tooth 21d, the fifth driven tooth 21e, and the 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 circumferential center line L1. On the other side, the first driven tooth 21a and the sixth driven tooth 21f are symmetrically arranged about the circumferential center line L1, the second driven tooth 21b and the fifth driven tooth 21e are symmetrically arranged about the circumferential center line L1, the third driven tooth 21c and the fourth driven tooth 21d are symmetrically arranged about the circumferential center line L1, the first driven tooth 21a and the second driven tooth 21b have a distance of three times the tooth thickness, the second driven tooth 21b and the third driven tooth 21c have a distance of three times the tooth thickness, the third driven tooth 21c and the fourth driven tooth 21d have a distance of one tooth thickness, the fourth driven tooth 21d and the fifth driven tooth 21e have a distance of three times the tooth thickness, the fifth driven tooth 21e and the sixth driven tooth 21f have a distance of three times the tooth thickness, and the two teeth closest to the red dividing line have a distance of five times the tooth thickness.

[0099] The gear clutch structure includes six meshing states, specifically:

[0100] like Figure 8 As shown, in the first meshing state, the second driving tooth 11b and the fourth driven tooth 21d are meshed, Figure 8 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the first driven tooth 21a and the first driving tooth 11a located at the rear side thereof have a distance twice the tooth thickness.

[0101] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates one tooth angle relative to the driven gear 2 in the disengaged state, 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 state as follows: Fig. 9 The second meshing state is shown.

[0102] like Fig. 9 As shown, in the second meshing state, the first active tooth 11a and the first driven tooth 21a are meshed. Fig. 9 The three driving teeth 11 connected by the red triangle are meshed with the driven gear 2, and the distance between the fifth driven tooth 21e and the second driving tooth 11b located at the rear side thereof is twice the tooth thickness.

[0103] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates two teeth relative to the driven gear 2 in the disengaged state, 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 state as follows: Fig.10 The third meshing state is shown.

[0104] like Fig.10 As shown, in the third meshing state, the second driving tooth 11b and the fifth driven tooth 21e are meshed. Fig.10 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the distance between the second driven tooth 21b and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0105] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates three teeth relative to the driven gear 2 in the disengaged state, 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 state as follows: Fig.11 The fourth meshing state is shown.

[0106] like Fig.11 As shown, in the fourth meshing state, the first active tooth 11a and the second driven tooth 21b are meshed. Fig.11 The three driving teeth 11 connected by the red triangle are meshed with the driven gear 2, and the distance between the sixth driven tooth 21f and the second driving tooth 11b located at the rear side thereof is twice the tooth thickness.

[0107] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates four teeth relative to the driven gear 2 in the disengaged state, the second driving tooth 11b and the sixth driven tooth 21f are meshed when meshing. The driving gear 1 and the driven gear 2 are in the state as follows: Fig.12 The fifth meshing state is shown.

[0108] like Fig.12 As shown, in the fifth meshing state, the second driving tooth 11b and the sixth driven tooth 21f are meshed, Fig.12 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the distance between the third driven tooth 21c and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0109] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates five teeth relative to the driven gear 2 in the disengaged state, the first driving tooth 11a and the third driven tooth 21c are meshed when meshing. The driving gear 1 and the driven gear 2 are in the state as follows: Fig.13 The sixth meshing state is shown.

[0110] like Fig.13 As shown, in the sixth meshing state, the first active tooth 11a and the third driven tooth 21c are meshed. Fig.13 The three driving teeth 11 connected by the red triangle are meshed with the driven gear 2, and the fourth driven tooth 21d and the first driving tooth 11a located at the rear side thereof have a distance of twice the tooth thickness.

[0111] So, Figure 8 The meshing state is the starting point. If the driving gear 1 rotates six teeth relative to the driven gear 2 in the disengaged state, the driving gear 1 and the driven gear 2 will return to the meshing state. Figure 8 The first meshing state shown completes the cycle.

[0112] It can be seen that when the teeth in the second tooth group 2a are arranged as above, the driving gear 1 and the driven gear 2 can mesh with each other in the separated state regardless of the rotation angle of the driving gear 1 relative to the driven gear 2, thereby ensuring that the gear clutch structure can perform the clutch function normally.

[0113] In this embodiment, b=6, and the distance between two adjacent teeth in the first tooth group is eleven times the tooth thickness, that is, the distance between the first active tooth 11a and the second active tooth 11b is eleven times the tooth thickness. Since the active teeth 11 are evenly distributed, that is, the distance between two adjacent active teeth 11 is eleven times the tooth thickness. Compared with the complete teeth, five active teeth 21 are reduced between two adjacent active teeth 11.

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

[0115] Further, 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 twice the distance of the tooth thickness than the distance between two teeth close to each other in two adjacent first tooth groups, and the distance between the two closest teeth in two adjacent second tooth groups 2a is one tooth thickness.

[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] Combination Figure 14-17 It is understood that the total number of teeth of the driving gear 1 and the driven gear 2 is 48, the factors of 48 are not less than 3 and less than 48, and the factors that can be divided 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] Take z1=12, z2=12 as an example to illustrate. Figure 14-17 It is understood that the driving gear 1 includes a driving tooth 11 with a tooth number z1=12, each driving tooth 11 is evenly distributed along the circumferential direction, the driven gear 2 includes a driven tooth 21 with a tooth number z2=12, the number of meshing teeth of the driving gear 1 and the driven gear 2 is n=3, the driving teeth are evenly divided into four first tooth groups, and the interval between two adjacent teeth in the same first tooth group is 120°. Fig.14 It can be seen that the three driving teeth 11 connected by blue triangles are a first tooth group, the three driving teeth 11 connected by red triangles are a first tooth group, the three driving teeth 11 connected by black triangles are a first tooth group, and the three driving teeth 11 connected by yellow triangles are a first tooth group.

[0125] Depend on Fig.14 It can be seen that the driven teeth are divided into three second tooth groups 2a by the three black dotted lines, each second tooth group 2a includes four adjacent teeth, and the four adjacent driving teeth 11 in the four first tooth groups are defined 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 along the circumferential direction.

[0126] The spacing 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 spacing 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, and the spacing 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 active teeth 11 is seven times the tooth thickness, that is, compared with the state where the active gear 1 has complete teeth, three teeth are reduced between two adjacent active teeth 11. The distance between two adjacent teeth in the second tooth group 2a is two times the tooth thickness greater than the distance between two adjacent teeth in the first tooth group, and the two teeth closest to the dotted line, that is, the two closest teeth in two adjacent second tooth groups 2a, have a distance of one tooth thickness.

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

[0129] like Fig.14 As shown, in the first meshing state, the first active tooth 11a and the first driven tooth 21a are meshed. Fig.14 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the distance between the second driven tooth 21b and the second driving tooth 11b located at the rear side thereof is twice the tooth thickness.

[0130] So, Fig.14 The meshing state is the starting point. If the driving gear 1 rotates one tooth angle relative to the driven gear 2 in the disengaged state, when meshing, the second driving tooth 11b meshes with the second driven tooth 21b. The driving gear 1 and the driven gear 2 are in the state as follows: Fig.15 The second meshing state is shown.

[0131] like Fig.15 As shown, in the second meshing state, the second driving tooth 11b and the second driven tooth 21b are meshed with each other. Fig.15 The three driving teeth 11 connected by the red triangle are meshed with the driven gear 2, and the distance between the third driven tooth 21c and the third driving tooth 11c located at the rear side thereof is twice the tooth thickness.

[0132] So, Fig.14 The meshing state is the starting point. If the driving gear 1 rotates two teeth relative to the driven gear 2 in the disengaged state, 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 follows: Fig.16The third meshing state is shown.

[0133] like Fig.16 As shown, in the third meshing state, the third driving tooth 11c and the third driven tooth 21c are meshed. Fig.16 The three driving teeth 11 connected by the black triangle are meshed with the driven gear 2, and the fourth driven tooth 21d and the fourth driving tooth 11d located at the rear side thereof have a distance of twice the tooth thickness.

[0134] So, Fig.14 The meshing state is the starting point. If the driving gear 1 rotates three teeth relative to the driven gear 2 in the disengaged state, 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 state as follows: Fig.17 The fourth meshing state is shown.

[0135] like Fig.17 As shown, in the fourth meshing state, the fourth driving tooth 11d and the fourth driven tooth 21d are meshed. Fig.17 The three driving teeth 11 connected by the yellow triangle are meshed with the driven gear 2 , and the distance between the first driving tooth 11 a and the driving tooth 11 located at the rear side thereof is twice the tooth thickness.

[0136] So, Fig.14 The meshing state is the starting point. If the driving gear 1 rotates four teeth relative to the driven gear 2 in the disengaged state, the driving gear 1 and the driven gear 2 will return to the meshing state. Fig.14 The first meshing state shown completes the cycle.

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

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

[0139] In one 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, 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 close teeth in two adjacent first tooth groups have a distance of seven times the tooth thickness.

[0140] Combination Figure 18-Figure 21 It is understood that the number of teeth of the driving gear 1 and the driven gear 2 is 36, the factors of 36 are not less than 3 and less than 36, and the factors that can be divided by 360 include 3, 4, 6, 9, 12, and 18. 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:

[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 and z2=12 as an example, the driving gear 1 includes a driving tooth 11 with a number of teeth z1=9, and each driving tooth 11 is evenly distributed along the circumference. The driven gear 2 includes a driven tooth 21 with a number of teeth z2=12. The number of meshing teeth of the driving gear 1 and the driven gear 2 is n=3. The driving teeth are evenly divided into three first tooth groups. The interval between two adjacent teeth in the same first tooth group is 120°. Fig.18 It can be seen 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, and the three driving teeth 11 connected by the black triangle are a first tooth group.

[0148] Depend on Fig.18 It can be seen that the driven teeth are divided into three second tooth groups 2a by the three dotted lines, each second tooth group 2a includes four adjacent teeth, and the three adjacent driving teeth 11 in the three first tooth groups are defined 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 along the circumferential direction.

[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 reduced 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 reduced 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 reduced 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 two adjacent 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 from the two closest teeth in two adjacent second tooth groups 2a.

[0151] 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 reduced between two adjacent driving teeth 11 .

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

[0153] like Fig.18 As shown, in the first meshing state, the second driving tooth 11b and the second driven tooth 21b are meshed with each other. Fig.18 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the fourth driven tooth 21d and the third driving tooth 11c located at the rear side thereof have a distance of twice the tooth thickness.

[0154] So, Fig.18 The meshing state is the starting point. If the driving gear 1 rotates one tooth angle relative to the driven gear 2 in the disengaged state, 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 state as shown in FIG. Fig.19 The second meshing state is shown.

[0155] like Fig.19 As shown, in the second meshing state, the third driving tooth 11c and the fourth driven tooth 21d are meshed, Fig.19 The three driving teeth 11 connected by the red triangle are meshed with the driven gear 2, and the distance between the first driven tooth 21a and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0156] So, Fig.18The meshing state is the starting point. If the driving gear 1 rotates two teeth relative to the driven gear 2 in the disengaged state, 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 state as follows: Fig. 20 The third meshing state is shown.

[0157] like Fig. 20 As shown, in the third meshing state, the first active tooth 11a and the first driven tooth 21a are meshed. Fig. 20 The three driving teeth 11 connected by the black triangle are meshed with the driven gear 2, and the distance between the third driven tooth 21c and the second driving tooth 11b located at the rear side thereof is twice the tooth thickness.

[0158] So, Fig.18 The meshing state is the starting point. If the driving gear 1 rotates three teeth relative to the driven gear 2 in the disengaged state, the second driving tooth 11b and the third driven tooth 21c are meshed when meshing. The driving gear 1 and the driven gear 2 are in the state as follows: Fig.21 The fourth meshing state is shown.

[0159] like Fig.21 As shown, in the fourth meshing state, the second driving tooth 11b and the third driven tooth 21c are meshed, Fig.21 The three driving teeth 11 connected by the blue triangle are meshed with the driven gear 2, and the distance between the second driven tooth 21b and the first driving tooth 11a located at the rear side thereof is twice the tooth thickness.

[0160] So, Fig.18 The meshing state is the starting point. If the driving gear 1 rotates four teeth relative to the driven gear 2 in the disengaged state, the driving gear 1 and the driven gear 2 will return to the meshing state. Fig.18 The first meshing state shown completes the 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, the driving gear 1 can mesh with the driven gear 2 at any angle relative to the driven gear 2, ensuring that the gear clutch structure can perform the clutch function normally.

[0162] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection 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) degrees; 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 driving tooth (11) is located at the rear side of the driven tooth (12).

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 located 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, and 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 a distance 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, a distance of nine times the tooth thickness exists between two adjacent teeth in the second tooth group (2a), a distance of seven times the tooth thickness exists between two adjacent teeth in the first tooth group, and a distance of one tooth thickness exists between two adjacent teeth that are closest to each other in the second tooth group (2a).

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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