Double-sided toothed belt

Abstract

The utility model relates to the technical field of motor vehicles, and discloses a double-sided toothed belt which comprises a first belt body and a second belt body. The first belt body is annular; a first tooth groove is formed in the inner ring curved surface of the first belt body; the second belt body is arranged on the outer ring curved surface of the first belt body in an annular structure in a surrounding manner; a second tooth groove is formed in the outer ring curved surface of the second belt body; in the second direction, the two sides of the first belt body are provided with binding surfaces, and the two sides of the second belt body are provided with tangent planes; the included angle between the binding face and the tangent plane is lambda, and lambda is larger than 90 degrees and smaller than 180 degrees. The tangent plane is arranged on the side, close to the second belt body, of the attaching face, the included angle between the tangent plane and the attaching face is set to range from 90 degrees to 180 degrees, then the exhaust space between the side wall of the second belt body and an external transmission wheel is enlarged, gas pressed out due to high-speed rotation can obtain a larger oscillation space, and the oscillation effect is improved. Therefore, the vibration frequency and amplitude of the pressed gas are effectively reduced, whistling sound is reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor vehicles, in particular to a double-sided toothed belt. Background Art

[0002] A motor vehicle refers to a wheeled vehicle driven or towed by a power device and used for carrying passengers or transporting goods on roads and performing special engineering operations. There are many types of motor vehicles, including large vehicles, small vehicles, special vehicles, special-purpose vehicles, three-wheeled motorcycles, two-wheeled motorcycles and trailers, etc. The transmission system of a motor vehicle includes an automatic transmission system, a manual transmission system and a continuously variable transmission system. Among them, the biggest feature of the continuously variable transmission system is that it steplessly controls the output speed ratio. During driving, the passengers can't feel the shift impact and the power connection is continuous. Therefore, the motor vehicle equipped with the continuously variable transmission system has better driving comfort and is more adopted by high-end vehicles.

[0003] The internal of the continuously variable transmission system doesn't have the gear transmission structure of the traditional gearbox. Instead, it is driven by two drive wheels with variable diameters, with a double-sided toothed belt sleeved in the middle. However, when the existing continuously variable transmission system shifts gears, the belt rotates at high speed, and the air between the belt teeth is quickly squeezed out, thereby generating a whistling sound, which has always been a technical problem difficult to solve in the continuously variable transmission system and affects the user experience. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is:

[0005] The double-sided toothed belt generates a whistling sound during the high-speed rotation process, affecting the user experience.

[0006] To solve the above technical problem, the utility model provides a double-sided toothed belt with an intersecting first direction and second direction. The double-sided toothed belt includes:

[0007] A first belt body, which is arranged in an annular structure; a first tooth groove is arranged on the inner curved surface of the first belt body, and the first tooth groove is in a groove shape and extends from the inner curved surface of the first belt body along the first direction towards the inside of the first belt body; and

[0008] A second belt body, connected to the first belt body, and the second belt body is arranged in an annular structure around the outer curved surface of the first belt body; a second tooth groove is arranged on the outer curved surface of the second belt body, and the second tooth groove is in a groove shape and extends from the outer curved surface of the second belt body along the first direction towards the inside of the second belt body;

[0009] Wherein, fitting surfaces are arranged on both sides of the first belt body in the second direction, and cutting surfaces are arranged on both sides of the second belt body in the second direction; the included angle between the extension plane where the fitting surface is located and the extension plane where the cutting surface is located is λ, and 90° < λ < 180°.

[0010] In one embodiment, the depth of the second tooth groove is B, and the height of the section is H;

[0011] Among them, H≥0.75B.

[0012] In one embodiment, in the first direction, the depth of the first tooth groove is D;

[0013] Among them, 1.5B<D<3B.

[0014] In one embodiment, the cut surfaces on both sides are parallel to each other and extend along the first direction.

[0015] In one embodiment, the fitting surfaces on both sides extend obliquely from the second belt body toward the first belt body in a gradually approaching manner.

[0016] In one embodiment, the double-sided toothed belt further includes a cord; the cord is in the shape of an elongated strip and is inserted into the first belt body along the circumference of the first belt body.

[0017] In one embodiment, a plurality of the cords are provided, and each of the cords is spirally wound along the circumference of the first belt body.

[0018] In one embodiment, the first tooth groove penetrates the fitting surfaces on both sides along the second direction, and a plurality of first tooth grooves are provided, and the first tooth grooves are evenly spaced along the circumference of the first belt body.

[0019] In one embodiment, the second tooth groove penetrates the cut surface on both sides along the second direction, and a plurality of second tooth grooves are provided, and the second tooth grooves are evenly spaced along the circumference of the second belt body.

[0020] In one embodiment, the number of the second tooth grooves is the same as the number of the first tooth grooves, and the second tooth grooves are respectively arranged between two adjacent first tooth grooves.

[0021] Compared with the prior art, the above double-sided toothed belt has the following beneficial effects:

[0022] The conventional double-sided toothed belt only has inclined fitting surfaces on both sides. The present application provides a cut surface on the side of the fitting surface close to the second belt body, and sets the angle between the cut surface and the fitting surface to ninety to one hundred and eighty degrees, thereby increasing the exhaust space between the side wall of the second belt body and the external transmission wheel, so that the gas pressed out of the first tooth groove and the second tooth groove due to high-speed rotation obtains a larger oscillation space, thereby effectively reducing the vibration frequency and amplitude of the pressed gas, thereby reducing the howling sound and improving the user experience.

[0023] By making the height dimension of the cut surface larger than the depth dimension of the second tooth groove in the first direction, it is possible to prevent gas from leaking out first from the second tooth groove during the extrusion process. Premature leakage of gas from the second tooth groove can cause the concentrated release of internal gas stress. Therefore, by avoiding the concentrated release of internal gas stress from the end of the second tooth groove, the vibration frequency and amplitude of the gas during extrusion can be further reduced, thereby significantly reducing the whistling sound and further improving the user experience.

[0024] Since cut surfaces are provided on both sides of the second belt body for the purpose of reducing the whistling sound, the contact area between the double-sided toothed belt and the external driving wheel is reduced. To solve the above problem, through experimental testing, by setting the depth of the first tooth groove to be between 1.5 times and 3 times the depth of the second tooth groove, the contact area between the first belt body and the driving wheel can be effectively increased, thereby ensuring the tightness of the connection between the driving wheel and the double-sided toothed belt and the reliability of power transmission. At the same time, it is avoided that the depth of the first tooth groove is too large, resulting in too small an inner side dimension of the first belt body and insufficient load-bearing capacity, which may cause deformation of the first belt body during high-speed rotation, and further lead to slippage between the double-sided toothed belt and the driving wheel. Therefore, by setting the depth of the first tooth groove to be between 1.5 times and 3 times the depth of the second tooth groove, the contact area between the first belt body and the driving wheel can be effectively increased while ensuring that the strength of the first belt body is sufficient to support no deformation and slippage during high-speed rotation, thereby improving the stability of the double-sided toothed belt for power transmission. Description of the Drawings

[0025] Figure 1 Structural schematic diagram of the double-sided toothed belt in the assembled state according to an embodiment of the present invention;

[0026] Figure 2 is Figure 1 Partial structural schematic diagram of the double-sided toothed belt in ;

[0027] Figure 3 is Figure 2 Circumferential cross-sectional schematic diagram of the double-sided toothed belt in ;

[0028] Figure 4 is Figure 2 Side view schematic diagram of the double-sided toothed belt in ;

[0029] Figure 5 Side view schematic diagram of the double-sided toothed belt of another embodiment;

[0030] Figure 6 Schematic diagram of the result of the noise test of the double-sided toothed belt in this application compared with the existing structure.

[0031] The meanings of the reference numerals in the drawings are as follows:

[0032] 100. Double-sided toothed belt;

[0033] 10. First belt body; 11. First tooth groove; 15. Fitting surface;

[0034] 20. Second belt body; 21. Second tooth groove; 25. Cutting surface;

[0035] 30. Wire rope;

[0036] 90. Driving wheel;

[0037] X. First direction; Y. Second direction. Detailed implementation mode

[0038] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation mode of the present utility model is made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0044] It should be noted that according to Figures 2 to 5 As shown, in the embodiment of the present utility model, the X-axis direction intersects with the Y-axis direction. For the convenience of description, the first direction is defined as the X-axis direction and the second direction is defined as the Y-axis direction. In this embodiment, the X-axis direction and the Y-axis direction are coplanar and relatively perpendicular to each other, and the first direction and the second direction are relatively perpendicular. Further, in the present application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximately parallelism commonly recognized in engineering. For example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the state of -1° to 1°; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximately perpendicularity commonly recognized in engineering. For example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the state of 89° to 91°. Equal distance or equal angle includes not only the case of absolute equality, but also the case of approximately equality commonly recognized in engineering, that is, there may be a certain error, such as the state within the tolerance range of -1% to 1%.

[0045] Please refer to Figures 1 to 6 , a double-sided toothed belt 100 according to an embodiment of the present invention, which includes a first belt body 10 and a second belt body 20. The first belt body 10 is arranged in an annular structure; a first tooth groove 11 is provided on the inner curved surface of the first belt body 10, and the first tooth groove 11 is in the shape of a groove and extends from the inner curved surface of the first belt body 10 along a first direction towards the inside of the first belt body 10. The second belt body 20 is connected to the first belt body 10, and the second belt body 20 is arranged in an annular structure around the outer curved surface of the first belt body 10; a second tooth groove 21 is provided on the outer curved surface of the second belt body 20, and the second tooth groove 21 is in the shape of a groove and extends from the outer curved surface of the second belt body 20 along the first direction towards the inside of the second belt body 20. Wherein, fitting surfaces 15 are provided on both sides of the first belt body 10 in a second direction, and cutting surfaces 25 are provided on both sides of the second belt body 20 in the second direction; the included angle between the extension plane where the fitting surface 15 is located and the extension plane where the cutting surface 25 is located is λ, and 90° < λ < 180°. The double-sided toothed belt 100 is annular, and in the assembled state, the double-sided toothed belt 100 is sleeved on the outside of a driving wheel 90, and the double-sided toothed belt 100 is used for power transmission. The first belt body 10 is arranged on the inner side of the double-sided toothed belt 100, and the second belt body 20 is arranged on the outside of the double-sided toothed belt 100. Fitting surfaces 15 are provided on both sides of the first belt body 10, and the fitting surfaces 15 are in contact with the driving wheel 90, thereby ensuring the power transmission of the double-sided toothed belt 100. By providing the cutting surfaces 25 on both sides of the second belt body 20, and there is an included angle between the cutting surfaces 25 and the extension surface, the second belt body 20 is separated from the driving wheel 90. During the high-speed rotation process, the gas in the first tooth groove 11 and the second tooth groove 21 is pressed out. Since there is a spaced arrangement between the cutting surfaces 25 and the driving wheel 90, an oscillation space is provided for the pressed-out gas, avoiding high-frequency vibration caused by concentrated leakage of the gas, thereby effectively reducing the oscillation frequency and amplitude of the pressed-out gas through the cutting surfaces 25, further reducing the whistling sound and improving the user experience.

[0046] Further, the first belt body 10 is in an annular structure, and a first tooth groove 11 is provided on the inner curved surface of the first belt body 10. A plurality of the first tooth grooves 11 are provided, and the first tooth grooves 11 are evenly spaced along the circumferential direction of the first belt body 10. The first tooth groove 11 is used to improve the flexibility of the inner side surface of the double-sided toothed belt 100, thereby ensuring the use stability of the first belt body 10 during the process of being repeatedly bent at high speed during high-speed rotation. Fitting surfaces 15 are provided on both sides of the first belt body 10 in the second direction, and the first tooth groove 11 penetrates through the fitting surfaces 15 on both sides along the second direction.

[0047] Further, the second belt body 20 has an annular structure. The second belt body 20 is disposed around the outer side of the first belt body 10. Second tooth grooves 21 are provided on the outer circumferential surface of the second belt body 20. A plurality of the second tooth grooves 21 are provided, and the second tooth grooves 21 are evenly spaced along the circumferential direction of the second belt body 20. The second tooth grooves 21 are used to improve the flexibility of the outer side surface of the double-sided toothed belt 100, and further ensure the use stability of the second belt body 20 during the process of being repeatedly bent at high speed. Cut surfaces 25 are provided on both sides of the second belt body 20 in the second direction, and the second tooth grooves 21 penetrate through the cut surfaces 25 on both sides in the second direction.

[0048] Further, please refer to Figure 4 As shown in the figure, the number of the second tooth grooves 21 is the same as that of the first tooth grooves 11. The second tooth grooves 21 are respectively disposed between two adjacent first tooth grooves 11. That is, the first tooth grooves 11 and the second tooth grooves 21 are alternately arranged on the inner and outer sides of the double-sided toothed belt 100. In this way, during the bending process, the position where the first tooth groove 11 is squeezed and deformed corresponds to the position where the second belt body 20 has a high bearing strength, and the position where the second tooth groove 21 is squeezed and deformed corresponds to the position where the first belt body 10 has a high bearing strength. That is, the inner circumferential surface of the first belt body 10 has a high and low alternating distribution due to the provision of the first tooth grooves 11. The first tooth grooves 11 correspond to the low positions, and the inner circumferential surface of the first belt body 10 corresponds to the high positions. Therefore, the bearing strength at the inner circumferential surface of the first belt body 10 is higher than that at the first tooth grooves 11. Similarly, the bearing strength at the position where the second belt body 20 is provided with the second tooth grooves 21 is lower than that at the outer circumferential surface of the second belt body 20. In this way, by alternately arranging the first tooth grooves 11 and the second tooth grooves 21, the low bearing position of the first belt body 10 corresponds to the high bearing position of the second belt body 20, and the high bearing position of the first belt body 10 corresponds to the low bearing position of the second belt body 20. In this way, it is ensured that the double-sided toothed belt 100 can also maintain a certain hardness during the high-speed rotation process, so as to increase the pressure between the double-sided toothed belt 100 and the transmission wheel 90, reduce the occurrence frequency of slipping between the double-sided toothed belt 100 and the transmission wheel 90, and further improve the transmission efficiency of the double-sided toothed belt 100 for power transmission. In this embodiment, since the cut surfaces 25 are provided on both sides of the second belt body 20, it is equivalent to reducing the engagement area between the double-sided toothed belt 100 and the transmission wheel 90. Therefore, it is easy to have a slipping situation. By alternately arranging the first tooth grooves 11 and the second tooth grooves 21 on both sides of the double-sided toothed belt 100, the slipping situation can be effectively reduced, and it is ensured that the transmission efficiency of power can still be maintained after the cut surfaces 25 are provided on both sides of the second belt body 20.

[0049] Further, please refer to Figure 5, another structure of the double-sided toothed belt 100 of another embodiment is disclosed. In this embodiment, the number of the first tooth grooves 11 and the second tooth grooves 21 is also equal. The difference is that the first tooth grooves 11 and the second tooth grooves 21 are oppositely arranged on the inner and outer sides of the double-sided toothed belt 100. The advantage of such a designed structure is that by arranging the first tooth grooves 11 and the second tooth grooves 21 oppositely, the double-sided toothed belt 100 is more easily bent, thereby improving the flexibility of the double-sided toothed belt 100.

[0050] Further, referring to Figures 1 to 4 , the cut surfaces 25 on both sides are parallel to each other and extend along the first direction. The fitting surfaces 15 on both sides extend in a gradually approaching and inclined manner from the second belt body 20 towards the first belt body 10. During the use of the double-sided toothed belt 100, it will be embedded in the transmission wheel 90. The double-sided toothed belt 100 is in contact and fit with the transmission wheel 90 through the fitting surfaces 15 on both sides, and then the power of the driving transmission wheel 90 is transmitted to the driven transmission wheel 90 through the frictional force. In this embodiment, in the first direction, the depth of the second tooth groove 21 is B, and the height of the cut surface 25 is H; where H≥0.75B. By making the height of the cut surface 25 in the first direction greater than 0.75 times the depth of the second tooth groove 21, it is avoided that the gas leaks out from the second tooth groove 21 first during the extrusion process, and further avoided that the stress of the gas is concentrated and released at the second tooth groove 21 during the discharge process, further reducing the vibration frequency and amplitude when the gas is extruded, and further greatly reducing the whistling sound, and further improving the user experience. Referring to Figure 6 , the results of the comparative experiment on the improved structure of the double-sided toothed belt 100 and the existing mass-produced structure; the improved structure of the double-sided toothed belt 100 is the structure with the cut surface 25 provided and the height of the cut surface 25 in the first direction greater than the depth of the second tooth groove 21; the existing mass-produced structure is the structure without the cut surface 25 and only with the fitting surfaces 15 provided on both sides of the double-sided toothed belt 100. The experimental results show that by providing the cut surface 25 and making the height of the cut surface 25 in the first direction greater than the depth of the second tooth groove 21, when accelerating the oil return from 4000 rpm to 1750 rpm, the sound pressure can effectively drop by 2 dB(A) to 5 dB(A), and the sound pressure drops significantly.

[0051] Further, the depth of the first tooth groove 11 is D; wherein, 1.5B<D<3B. Through experimental tests, by setting the depth of the first tooth groove 11 to between 1.5 times and 3 times the depth of the second tooth groove 21, the area of the fitting surface 15 between the first belt body 10 and the transmission wheel 90 can be effectively increased, thereby ensuring the tightness of the connection between the transmission wheel 90 and the double-sided toothed belt 100, and ensuring the reliability of power transmission. At the same time, it is avoided that the depth of the first tooth groove 11 is too large, so that the inner size of the first belt body 10 is too small and the bearing capacity is insufficient, resulting in deformation of the first belt body 10 during high-speed rotation, thereby causing slippage between the double-sided toothed belt 100 and the transmission wheel 90. Therefore, by setting the depth of the first tooth groove 11 to between 1.5 times and 3 times the depth of the second tooth groove 21, the area of the fitting surface 15 between the first belt body 10 and the transmission wheel 90 can be effectively balanced and increased, while ensuring that the strength of the first belt body 10 is sufficient to support the high-speed rotation without deformation and slippage, thereby improving the stability of the double-sided toothed belt 100 for power transmission.

[0052] Furthermore, the double-sided toothed belt 100 also includes a cord 30. The cord 30 is in the shape of a long strip and is arranged in the first belt body 10 along the circumference of the first belt body 10. The cord 30 is used to improve the bearing strength of the double-sided toothed belt 100 and extend the service life of the double-sided toothed belt 100 in a reciprocating bending working state. In this embodiment, the number of the cords 30 is multiple, and each cord 30 is spirally wound along the circumference of the first belt body 10. By spirally winding the cords 30, the comprehensive bearing performance of the cords 30 in all directions after winding is improved, and the service life of the double-sided toothed belt 100 is further extended.

[0053] In summary, the embodiment of the utility model provides a double-sided toothed belt 100, which has the following beneficial effects:

[0054] The conventional double-sided toothed belt 100 only has inclined fitting surfaces 15 on both sides. The present application provides a cut surface 25 on the side of the fitting surface 15 close to the second belt body 20, and sets the angle between the cut surface 25 and the fitting surface 15 to ninety to one hundred and eighty degrees, thereby increasing the exhaust space between the side wall of the second belt body 20 and the external transmission wheel 90, so that the gas pressed out of the first tooth groove 11 and the second tooth groove 21 due to high-speed rotation obtains a larger oscillation space, thereby effectively reducing the vibration frequency and amplitude of the pressed gas, thereby reducing the howling sound and improving the user experience.

[0055] By making the height dimension of the cut surface 25 larger than the depth dimension of the second tooth groove 21 in the first direction, it is prevented that the gas leaks out from the second tooth groove 21 first during the extrusion process. Leaking out from the second tooth groove 21 first will cause the internal stress of the gas to be concentrated and released. Therefore, it is prevented that the internal stress of the gas is concentrated and released from the end of the second tooth groove 21, which can further reduce the frequency and amplitude of the gas when it is pressed out, thereby greatly reducing the howling sound and further improving the user experience.

[0056] Since the two sides of the second belt body 20 are provided with cut surfaces 25 for the consideration of reducing whistling sounds, the contact area 15 between the double-sided toothed belt 100 and the external transmission wheel 90 is reduced. To solve the above problems, through experimental tests, by setting the depth of the first tooth groove 11 to be between 1.5 times and 3 times the depth of the second tooth groove 21, the contact area 15 between the first belt body 10 and the transmission wheel 90 can be effectively increased, thereby ensuring the tight connection between the transmission wheel 90 and the double-sided toothed belt 100 and the reliability of power transmission. At the same time, to avoid the depth of the first tooth groove 11 being too large, resulting in the inner size of the first belt body 10 being too small and the load-bearing capacity being insufficient, causing the first belt body 10 to deform during high-speed rotation, and then causing slippage between the double-sided toothed belt 100 and the transmission wheel 90. Therefore, by setting the depth of the first tooth groove 11 to be between 1.5 times and 3 times the depth of the second tooth groove 21, the contact area 15 between the first belt body 10 and the transmission wheel 90 can be effectively increased while ensuring that the strength of the first belt body 10 is sufficient to support no deformation and slippage during high-speed rotation, thereby improving the stability of the double-sided toothed belt 100 for power transmission.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0058] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A double-sided toothed belt having an intersecting first direction and a second direction, characterized in that, The double-sided toothed belt comprises: A first belt body, wherein the first belt body is provided in an annular structure; a first tooth groove is provided on the inner annular surface of the first belt body, and the first tooth groove is in a groove shape and extends from the inner annular surface of the first belt body along a first direction toward the inside of the first belt body; and A second belt body connected to the first belt body, the second belt body is annularly arranged on the outer annular surface of the first belt body; a second tooth groove is arranged on the outer annular surface of the second belt body, and the second tooth groove is in the shape of a groove and extends from the outer annular surface of the second belt body along the first direction to the inside of the second belt body; The first belt body is provided with fitting surfaces on both sides in the second direction, and the second belt body is provided with cutting surfaces on both sides in the second direction; the angle between the extension plane where the fitting surfaces are located and the extension plane where the cutting surfaces are located is λ, then 90°<λ<180°.

2. The double-sided toothed belt according to claim 1, characterized in that, In the first direction, the depth of the second tooth groove is B, and the height of the section is H; Among them, H≥0.75B.

3. The double-sided toothed belt according to claim 2, characterized in that, In the first direction, the depth of the first tooth groove is D; Among them, 1.5B<D<3B.

4. The double-sided toothed belt according to claim 1, characterized in that The cut surfaces on both sides are parallel to each other and extend along a first direction.

5. The double-sided toothed belt according to claim 4, wherein The fitting surfaces on both sides extend obliquely and gradually approach each other in a direction from the second belt body to the first belt body.

6. The double-sided toothed belt according to claim 1, characterized in that The double-sided toothed belt further includes a cord; the cord is in the shape of an elongated strip and is inserted into the first belt body along the circumference of the first belt body.

7. The double-sided toothed belt according to claim 6, characterized in that There are a plurality of wire ropes, each of which is spirally wound along the circumference of the first belt body.

8. The double-sided toothed belt according to claim 1, characterized in that, The first tooth grooves penetrate the fitting surfaces on both sides along the second direction. There are a plurality of first tooth grooves, and the first tooth grooves are evenly spaced along the circumference of the first belt body.

9. The double-sided toothed belt according to claim 8, wherein, The second tooth grooves penetrate the cut surfaces on both sides along the second direction. There are a plurality of second tooth grooves, and the second tooth grooves are evenly spaced along the circumference of the second belt body.

10. The double-sided toothed belt according to claim 9, characterized in that, The number of the second tooth grooves is the same as the number of the first tooth grooves, and the second tooth grooves are respectively arranged between two adjacent first tooth grooves.

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