Synchronous toothed belt gear assembly

Abstract

The utility model relates to a synchronous toothed belt gear assembly which comprises a synchronous gear and a synchronous toothed belt meshed with the synchronous gear, a plurality of limiting blocks are arranged on the synchronous toothed belt, and limiting grooves matched with the limiting blocks are formed in the synchronous gear. The multiple limiting blocks are evenly distributed on the central axis of the synchronous toothed belt in the length direction of the synchronous toothed belt at intervals, and the limiting grooves are formed in the circumferential central line of the outer side of the synchronous gear. The utility model solves the problems of inaccurate deviation rectification, unstable transmission, low efficiency and incompact structure in the traditional synchronous toothed belt transmission, realizes accurate deviation rectification and power transmission of the gear, improves the stability and reliability of transmission, optimizes the transmission efficiency, reduces the noise and vibration, and reduces the production cost. And efficient transmission is realized in a limited space.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field especially is related to a synchronous toothed belt gear assembly. BACKGROUND

[0002] Synchronous toothed belt drive is widely used in industrial automation, precision instruments and other fields due to its high transmission efficiency, no sliding and fixed ratio transmission advantage.

[0003] The traditional synchronous toothed belt drive system generally adopts the structure of installing a check ring on both sides of the synchronous toothed belt wheel to realize axial positioning.

[0004] The prior art in the above has the following defects: although the synchronous toothed belt body reserves the position for installing the check ring, it can prevent the synchronous toothed belt from moving in the actual transmission, but at the same time, it increases the production cost, including the increase of material and process cost, the synchronous toothed belt wheel body needs to reserve the check ring installation position, which leads to the increase of raw material width and the improvement of production process complexity, and the check ring itself needs to be purchased additionally.

[0005] In addition, in order to prevent the check ring from falling off, a welding or screw fixing process needs to be added, which increases the cost of reinforcement measures; meanwhile, there are reliability and maintenance problems, the check ring has the risk of falling off and foreign matter blocking the teeth, and the foreign matter falling into the tooth groove is blocked by the check ring and cannot be discharged.

[0006] There is also a problem of transmission performance, the sharp edge of the check ring is easy to cut the synchronous toothed belt, which causes the synchronous toothed belt to wear out, in order to avoid the height limitation of the check ring, the thickness of the synchronous toothed belt is increased, and the turning radius is also increased, which leads to the increase of the outer diameter of the synchronous toothed belt wheel, and causes the decrease of the compactness of the equipment. UTILITY MODEL CONTENTS

[0007] In view of the defects of the prior art, the utility model aims at providing a synchronous toothed belt gear assembly, which has the effects of accurate deviation correction of the gear, stable and reliable transmission, high transmission efficiency, cost saving, noise reduction and vibration reduction.

[0008] The above utility model of the utility model is realized by the following technical scheme:

[0009] A synchronous toothed belt gear assembly comprises a synchronous gear and a synchronous toothed belt engaged with the synchronous gear, a plurality of limiting blocks are arranged on the synchronous toothed belt, and limiting grooves matched with the limiting blocks are formed on the synchronous gear.

[0010] By matching the limiting blocks on the synchronous toothed belt with the limiting grooves of the synchronous gear, the accurate positioning and anti-disengagement of the synchronous toothed belt and the synchronous gear are realized, the synchronous toothed belt is prevented from slipping or mispositioning in the transmission process, and the transmission stability and reliability are improved.

[0011] The further technical scheme of the utility model discloses: a plurality of limiting blocks are evenly spaced on the central axis of the synchronous tooth belt along the length direction.

[0012] Through the above technical scheme, the limiting blocks are evenly spaced along the length direction of the synchronous tooth belt, so that the synchronous tooth belt and the synchronous gear are uniformly stressed when transmitting, vibration and noise are reduced, and the service life of the assembly is prolonged.

[0013] The further technical scheme of the utility model discloses: the limiting slot is arranged on the central line of the outer side of the synchronous gear.

[0014] Through the above technical scheme, the limiting slot is arranged on the central line of the outer side of the synchronous gear, so that the centering optimization of the synchronous tooth belt and the synchronous gear is realized, the precise engagement of the limiting block and the limiting slot is ensured, and the transmission efficiency and motion accuracy are improved.

[0015] The further technical scheme of the utility model discloses: on one side of the limiting block on the synchronous tooth belt, a plurality of first teeth and a plurality of first grooves are alternately and symmetrically distributed along the length direction of the synchronous tooth belt, on the other side of the limiting block, a plurality of second teeth and a plurality of second grooves are alternately and symmetrically distributed along the length direction of the synchronous tooth belt, the first tooth and the first groove are arranged on the synchronous gear and are engaged with the first groove and the first tooth respectively, the second tooth and the second groove are arranged on the synchronous gear and are engaged with the second groove and the second tooth respectively.

[0016] Through the above technical scheme, the first tooth, the first groove, the second tooth and the second groove are respectively located on the two sides of the limiting block, and the tooth and the groove on the two sides are mirror-symmetrically distributed, the bidirectional engagement structure of the tooth groove symmetrically distributed on the two sides of the synchronous tooth belt and the corresponding tooth groove of the synchronous gear realizes the bidirectional transmission capacity of the synchronous tooth belt and the synchronous gear, and adapts to the demand of complex transmission scenes.

[0017] The further technical scheme of the utility model discloses: the width of the upper surface of the limiting block is equal to the interval between the outer edge of the upper surface of the adjacent two first teeth and the adjacent two second teeth in the transmission direction of the synchronous tooth belt.

[0018] Through the above technical scheme, the equal design of the width of the limiting block and the interval of the adjacent tooth makes the limiting block and the tooth form a close cooperation relationship in the width direction of the synchronous tooth belt, realizes the close embedding of the limiting block and the limiting groove of the synchronous gear, further improves the stability and the anti-twisting performance of the synchronous tooth belt, prevents the transverse movement of the synchronous tooth belt during transmission, enhances the positioning stability, and still can keep good running state when high-speed transmission.

[0019] As a further technical scheme of the utility model: the first toothed section is trapezoidal, the tooth top and tooth root of the first tooth are circular arc, the second toothed section is trapezoidal, the tooth top and tooth root of the second tooth are circular arc.

[0020] Through the above technical scheme, the toothed design of the trapezoidal section helps to disperse stress in the transmission process, reduce stress concentration at the tooth root, and improve the fatigue life of the synchronous tooth belt.

[0021] As a further technical scheme of the utility model: the tooth shape of the first gear tooth and the second gear tooth is trapezoidal, the tooth top and tooth root of the first gear tooth and the second gear tooth are parallel to the synchronous gear axis, and the tooth top and tooth bottom of the first gear tooth and the second gear tooth are circular arc.

[0022] Through the above technical scheme, the gear tooth design of the trapezoidal tooth shape and the tooth top and tooth root parallel to the synchronous gear axis realizes efficient meshing of the synchronous gear and the synchronous tooth belt and ensures the consistency of the transmission direction, and the circular arc processing can reduce impact and friction loss.

[0023] As a further technical scheme of the utility model: the inner side surface of the first gear tooth and the inner side surface of the second gear tooth jointly form a positioning surface, the positioning surface includes a first positioning surface and a second positioning surface, the first positioning surface and the second positioning surface are both inclined away from the central axis direction of the synchronous gear, and a limiting groove for meshing with the limiting mechanism of the synchronous tooth belt is formed between the two.

[0024] Through the above technical scheme, the structure design of the inclined positioning surface forming the limiting groove makes the limiting groove have a certain opening angle in the radial direction of the synchronous gear, which is beneficial to the smooth entry of the limiting mechanism of the synchronous tooth belt into the limiting groove, strengthens the wedge-shaped cooperation of the limiting block of the synchronous tooth belt and the limiting groove of the synchronous gear, realizes accurate correction and positioning, enhances the axial positioning ability of the synchronous tooth belt and the synchronous gear, and improves the meshing accuracy and transmission stability of the gear and the synchronous tooth belt.

[0025] In summary, the utility model has at least one of the following beneficial technical effects:

[0026] 1. The utility model discloses a synchronous tooth belt gear assembly, which realizes the axial accurate positioning of the synchronous tooth belt and the synchronous gear through the matching meshing of the limiting block on the synchronous tooth belt and the limiting groove on the synchronous gear, prevents the tooth belt from deviating or slipping off in the transmission process, and ensures the synchronization accuracy and stability.

[0027] 2.The utility model discloses a synchronous toothed belt gear assembly, which is uniformly distributed through the limiting block, symmetrically and alternately distributed through the tooth and the groove / tooth and the wheel groove, and designed in shape through the tooth and the tooth, reduces the contact stress concentration and the abrasion, reduces the transmission noise, improves the load bearing capacity and the transmission efficiency simultaneously, prolongs the service life of the assembly.

[0028] 3.The utility model discloses a synchronous toothed belt gear assembly, which forms a limiting groove through the inclination design of the positioning surface, realizes the automatic centering function in the transmission process through the meshing constraint of the tooth / tooth on both sides, ensures that the meshing surface of the synchronous toothed belt and the synchronous gear is uniformly stressed, and avoids abnormal wear or failure caused by unilateral partial load. DRAWINGS

[0029] Figure 1 It is a structure schematic view of the embodiment one.

[0030] Figure 2 It is a right view of the embodiment one.

[0031] Figure 3 It is a front view of the synchronous toothed belt in the embodiment one.

[0032] Figure 4 It is a structure schematic view of the synchronous toothed belt in the embodiment one.

[0033] Figure 5 It is a right view of the synchronous gear in the embodiment one.

[0034] Figure 6 It is a structure schematic view of the synchronous gear in the embodiment one.

[0035] Figure 7 It is a front view of the synchronous gear in the embodiment one.

[0036] Reference signs: 1, synchronous toothed belt; 1A, synchronous toothed belt body; 11, limiting mechanism; 111, limiting block; 12, transmission mechanism; 121, first toothed belt surface; 1211, first tooth; 1212, first groove; 122, second toothed belt surface; 1221, second tooth; 1222, second groove; 2, synchronous gear; 21, wheel body; 22, synchronous gear surface; 221, first synchronous gear surface; 2211, first tooth; 2212, first groove; 222, second synchronous gear surface; 2221, second tooth; 2222, second groove; 23, limiting groove; 24, positioning surface; 241, first positioning surface; 242, second positioning surface. DETAILED DESCRIPTION

[0037] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described; obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments in the present application shall fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Embodiment one:

[0041] Referring to Figure 1 and Figure 2 The utility model discloses a synchronous toothed belt gear assembly, including synchronous toothed belt 1 and synchronous gear 2.

[0042] Synchronous toothed belt 1 includes synchronous toothed belt main body 1A, and the synchronous toothed belt main body 1A is provided with limiting mechanism 11 and transmission mechanism 12, limiting mechanism 11 is used for rectifying the synchronous gear 2 that is engaged with synchronous toothed belt main body 1A, and transmission mechanism 12 is engaged with synchronous gear 2 and is used for transmitting power.

[0043] Synchronous toothed belt main body 1A is made of high-strength composite material, and limiting mechanism 11 and transmission mechanism 12 are integrated, replacing traditional check ring, limiting mechanism 11 is distributed along the longitudinal center line symmetry, and transmission mechanism 12 includes first toothed belt surface 121 and second toothed belt surface 122 arranged on the same surface of synchronous toothed belt main body 1A, first toothed belt surface 121 and second toothed belt surface 122 are symmetrical axes with the longitudinal center line of limiting mechanism 11, and are respectively arranged on the two sides of limiting mechanism 11.

[0044] Referring toFigure 1 and Figure 2 The synchronous gear 2 comprises a wheel body 21, and a synchronous gear surface 22 and a limiting slot 23 distributed circumferentially on the outer periphery of the wheel body 21, the limiting slot 23 being used for cooperating with the limiting mechanism 11 to correct the synchronous gear 2, and the synchronous gear surface 22 being used for engaging with the transmission mechanism 12 to transmit power.

[0045] Referring to Figure 3 and 4 The limiting mechanism 11 comprises a plurality of limiting blocks 111, the limiting blocks 111 being uniformly spaced along the center line of the longitudinal extension direction of the synchronous tooth belt body 1A, the limiting blocks 111 being made of wear-resistant composite material, the limiting blocks 111 being in the shape of a ladder with the top narrow and the bottom wide, and the side edges of the limiting blocks 111 forming an overlapping angle of 15° with the toothed side edges.

[0046] Referring to Figure 4 The first toothed surface 121 is provided with a plurality of first teeth 1211 arranged at intervals, and a first tooth gap 1212 is formed between adjacent two first teeth 1211, and the second toothed surface 122 is provided with a plurality of second teeth 1221 arranged at intervals, and a second tooth gap 1222 is formed between adjacent two second teeth 1221.

[0047] Referring to Figure 4 The limiting blocks 111 are arranged in a staggered manner with the first teeth 1211 and the second teeth 1221 along the transmission direction of the synchronous tooth belt body 1A, and in a cross section perpendicular to the transmission direction of the synchronous tooth belt body 1A, the two side edges of the limiting blocks 111 form overlapping areas with the side edges of the first teeth 1211 and the side edges of the second teeth 1221 respectively.

[0048] Referring to Figure 4 The width of the upper surface of the limiting block 111 is equal to the distance between the outer edges of the upper surfaces of adjacent two teeth along the same tooth surface in the transmission direction of the synchronous tooth belt body 1A, and when the limiting block 111 is embedded in the gap of the first tooth 1211 or the second tooth 1221, a zero-gap contact interface is formed.

[0049] Referring to Figure 2 and Figure 4 The cross section of the first tooth 1211 and the second tooth 1221 is in the shape of a trapezoid, and the tooth top and the tooth root of the first tooth 1211 and the second tooth 1221 are designed in the shape of a circular arc to reduce the meshing impact.

[0050] Referring to Figure 6 and Figure 7 The synchronous gear surface 22 comprises a first synchronous gear surface 221 and a second synchronous gear surface 222, and the first synchronous gear surface 221 and the second synchronous gear surface 222 are symmetrically arranged on the two sides of the limiting slot 23 respectively.

[0051] A plurality of first teeth 2211 are arranged on the first synchronous gear face 221, a plurality of second teeth 2221 are arranged on the second synchronous gear face 222, a first tooth groove 2212 is formed between two adjacent first teeth 2211, and a second tooth groove 2222 is formed between two adjacent second teeth 2221.

[0052] With reference to Figure 5 and Figure 6 The tooth profile of the first tooth 2211 and the second tooth 2221 is trapezoidal, the tooth top and the tooth root of the first tooth 2211 and the second tooth 2221 are parallel to the axis of the wheel body 21, and the tooth top and the tooth bottom of the first tooth 2211 and the second tooth 2221 are circular arc-shaped.

[0053] With reference to Figure 7 The cross section of the limiting groove 23 is isosceles trapezoidal, the slot width of the limiting groove 23 gradually increases from the center of the wheel body 21 to the outer edge of the wheel body 21, and the inclination angle of the trapezoidal slot of the limiting groove 23 matches the inclination angle of the guide slope of the limiting mechanism 11.

[0054] With reference to Figure 7 The inner side surface of the first tooth 2211 and the inner side surface of the second tooth 2221 jointly constitute a positioning face 24, the positioning face 24 includes a first positioning face 241 and a second positioning face 242, the first positioning face 241 and the second positioning face 242 are both inclined away from the central axis direction of the synchronous gear 2, and a limiting groove 23 for engaging with the limiting mechanism 11 of the synchronous tooth belt 1 is formed between the first positioning face 241 and the second positioning face 242.

[0055] The width of the synchronous tooth belt 1 exceeds the width of the synchronous gear 2 on both sides, forming an extended protection area, which can directly block foreign matter from falling vertically into the tooth groove and prevent the tooth skipping failure.

[0056] When using the synchronous tooth belt gear assembly, first, the synchronous tooth belt 1 is aligned with the synchronous gear 2, and then pushed in the transmission direction, the inclined interface of the wedge-shaped limiting groove 23 automatically guides the limiting block 111 to be embedded, without manual adjustment.

[0057] Under high-speed rotation, the contact interface between the limiting block 111 and the limiting groove 23 continuously generates a radial correction force, which corrects the axial movement of the synchronous tooth belt 1 in real time.

[0058] The design that the width of the synchronous tooth belt 1 is greater than the width of the synchronous gear 2 can prevent the synchronous tooth belt 1 from skipping due to foreign matter falling into the tooth groove.

[0059] The tooth top and the tooth root of the first tooth 1211, the second tooth 1221, the first tooth 2211, and the second tooth 2221 are designed in a circular arc shape to reduce the engagement impact.

[0060] The symmetrical engagement of the double-toothed belt surface and the double-toothed gear surface uniformly distributes the torque, and when the load exceeds the rated value, the wedge-shaped interface of the limiting block 111 and the limiting groove 23 is elastically deformed to avoid hard impact damage.

[0061] When maintenance and replacement are needed, the synchronous tooth belt 1 can be directly removed from the synchronous gear 2, and the replacement time is shortened compared with the conventional scheme.

[0062] The embodiments of the specific embodiment are the preferred embodiments of the utility model, and are not limited to the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape, material, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A synchronous toothed belt and gear assembly, characterized by, The synchronization gear (2) and the synchronization gear belt (1) engaged with the synchronization gear (2) are provided with a plurality of limiting blocks (111), and the synchronization gear (2) is provided with a plurality of limiting grooves (23) matched with the limiting blocks (111).

2. A synchronous toothed belt and pulley assembly as set forth in claim 1 wherein, A plurality of limiting blocks (111) are uniformly and intermittently distributed on the central axis of the synchronization gear belt (1) along the length direction.

3. A synchronous toothed belt and pulley assembly as set forth in claim 1 wherein, The limiting grooves (23) are arranged on the central line of the outer side of the synchronization gear (2) in the circumferential direction.

4. A synchronous toothed belt and pulley assembly as set forth in claim 1 wherein, On one side of the limiting block (111) on the synchronization gear belt (1), a plurality of first teeth (1211) and a plurality of first grooves (1212) are alternately and symmetrically distributed along the length direction of the synchronization gear belt (1). On the other side of the limiting block (111), a plurality of second teeth (1221) and a plurality of second grooves (1222) are alternately and symmetrically distributed along the length direction of the synchronization gear belt (1). The first gear teeth (2211) and the first gear grooves (2212) are arranged on the synchronization gear (2) and engaged with the first grooves (1212) and the first teeth (1211) respectively. The second gear teeth (2221) and the second gear grooves (2222) are arranged on the synchronization gear (2) and engaged with the second grooves (1222) and the second teeth (1221) respectively.

5. A synchronous toothed belt and pulley assembly as set forth in claim 4 wherein, The width of the upper surface of the limiting block (111) is equal to the distance between the outer edges of the upper surfaces of the adjacent two first teeth (1211) and the adjacent two second teeth (1221) in the transmission direction of the synchronization gear belt (1).

6. A synchronous toothed belt and pulley assembly as set forth in claim 4 wherein, The cross section of the first tooth (1211) is trapezoidal, the tooth top and the tooth root of the first tooth (1211) are circular arc-shaped, the cross section of the second tooth (1221) is trapezoidal, and the tooth top and the tooth root of the second tooth (1221) are circular arc-shaped.

7. A synchronous toothed belt and pulley assembly as set forth in claim 4 wherein, The tooth shape of the first gear tooth (2211) and the second gear tooth (2221) is trapezoidal, the tooth top and the tooth root of the first gear tooth (2211) and the second gear tooth (2221) are parallel to the axis of the synchronization gear (2), and the tooth top and the tooth bottom of the first gear tooth (2211) and the second gear tooth (2221) are circular arc-shaped.

8. A synchronous toothed belt and pulley assembly as set forth in claim 4 wherein, The inner side surface of the first gear tooth (2211) and the inner side surface of the second gear tooth (2221) jointly form a positioning surface (24), the positioning surface (24) includes a first positioning surface (241) and a second positioning surface (242), the first positioning surface (241) and the second positioning surface (242) are inclined away from the central axis of the gear (2), and the limiting groove (23) for engaging with the limiting mechanism (11) is formed between the first positioning surface (241) and the second positioning surface (242).

Images