Driving disc and centrifugal clutch capable of rotating in two directions

Abstract

The driving disc and the centrifugal clutch capable of rotating in the two directions comprise a driving disc body, and multiple sets of limiting clamping and supporting parts are arranged on the outer circumference of the driving disc at equal intervals. Each limiting clamping and supporting part is composed of a pair of clamping and supporting blocks of the same structure. The pair of clamping and supporting blocks are oppositely arranged at intervals; the first inner side inclined faces of the clamping and supporting blocks intersect with the outer circumferential face of the driving disc. The first inner side inclined faces of the clamping and supporting blocks and the outer circumferential surface section, located between the first inner side inclined faces, of the driving disc define a fan-shaped clamping groove which is used for assembling the shoe blocks, and the fan-shaped clamping groove in the driving disc body can provide smooth contact conditions for the shoe blocks so as to restrain the centrifugal movement direction of the shoe blocks, so that the shoe blocks can be assembled more stably. Due to the fact that the two sides of the fan-shaped clamping groove are consistent in structure, and other shoe block fixing connecting pieces do not exist, the shoe block can adapt to bidirectional rotating transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal clutches, in particular to an active disc and a centrifugal clutch capable of bidirectional rotation. Background Art

[0002] A centrifugal clutch is a component that transfers power to a mechanical device. It uses centrifugal force to transfer power. When the engine crankshaft speed is high, the shoe structure in the centrifugal clutch will generate a centrifugal force that deviates from the center during rotation, causing it to rub against the inner surface of the clutch cover to transmit power to the gearbox connected to the cover. When the engine crankshaft speed is low, under the tension of the tension spring, the shoe structure separates from the cover, cutting off power transmission.

[0003] The existing shoe structure is generally fixed to the active disk through a fixed hinge pin, and the fixed hinge pin connects one side of the shoe structure to the active disk through bolts or other means, which has low installation efficiency. Since the fixed hinge pin is connected to the active disk through one side, the shoe structure rotates unidirectionally around the fixed hinge pin as the center. When rotating clockwise, power can be transmitted normally, but when rotating counterclockwise, power transmission will be greatly affected.

[0004] Therefore, those skilled in the art are committed to studying an active disc structure and a bidirectionally rotatable centrifugal clutch that can solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a driving plate and a centrifugal clutch capable of bidirectional rotation, so as to solve the problems of low installation efficiency of the driving plate and the shoe block proposed in the above background technology and large difference in bidirectional rotation transmission efficiency of the existing centrifugal clutch.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an active disk, including an active disk body, wherein a plurality of groups of limit clamping branches are arranged at equal intervals on the outer circumference of the active disk; each of the limit clamping branches is composed of a pair of clamping blocks with the same structure; the pair of clamping blocks are arranged relatively spaced apart; the first inner side inclined surfaces of the clamping blocks respectively intersect with the outer circumferential surface of the active disk; the first inner side inclined surfaces of the pair of clamping blocks and the outer circumferential surface segment of the active disk located between the first inner side inclined surfaces form a fan-shaped clamping groove.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] The utility model forms a fan-shaped slot through the opposite side surfaces of a pair of support blocks and the outer circumferential surface of the active disk. The fan-shaped slot can be used to assemble the shoe. The assembly process does not require fixed connection, so the assembly method is simple. In addition, the fan-shaped slot on the active disk body can also provide a smooth contact condition for the shoe, thereby constraining the direction of the centrifugal movement of the shoe. Since the structures on both sides of the fan-shaped slot are consistent and there are no other shoe fixing connectors, the problem of the fixed hinge pin interfering with the shoe movement from one side is avoided, so that the shoe can adapt to bidirectional rotation transmission.

[0009] In order to facilitate the assembly of the shoe, the first inner side inclined surface includes a first inclined surface segment, a transverse surface segment and a second inclined surface segment which are connected in sequence, and the second inclined surface segment intersects with the outer circumferential surface of the active disk.

[0010] Preferably, the vertical inclination angle of the first inner inclined surface is 20°-30°; or the vertical inclination angle of the first inclined surface segment is 20°-30°.

[0011] In order to facilitate the installation of the shoe block and provide installation and accommodation space for the tension spring connecting the shoe block, the surface of the clamping block opposite to the first inner side inclined surface is the second side surface; the clamping blocks belonging to different limit clamping parts and adjacent to each other are connected as a whole through the second side surface;

[0012] The middle sections of the two second side surfaces are circular outwardly curved surfaces.

[0013] In order to facilitate the installation of the cover plate on the active disk, a cover plate installation hole is opened on the upper end of the support block.

[0014] A centrifugal clutch capable of bidirectional rotation comprises a shoe and the above-mentioned active disk, wherein each of the fan-shaped slots corresponds to a shoe, and the shoe is provided with an inner convex portion matching the outer shape of the fan-shaped slot; the inner convex portion is clearance-matched with the fan-shaped slot.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a fan-shaped slot on the active disk and a corresponding inner convex portion on the shoe, so that the two cooperate with each other, thereby avoiding the influence of external force of the fixed connection between the two on the shoe transmission. Therefore, no matter whether the active disk rotates clockwise or counterclockwise, the shoe will move outward along the axial direction in the fan-shaped slot, and the shoe transmission efficiency is always guaranteed. More preferably, the contact surface between the fan-shaped slot and the inner convex portion can be made as smooth as possible, so as to further reduce the interference of external force on the shoe transmission.

[0017] More preferably, the inner convex portion includes a front end surface, a left side surface and a right side surface; the vertical angle between the left side surface and the right side surface and the front end surface is 20° to 30°;

[0018] The front end surface is an arc surface, and a clearance groove is formed between the arc surface and the outer circumferential surface of the driving disk, which makes it easier to assemble the shoe block and the driving disk.

[0019] In order to facilitate the connection between the shoe and the tension spring and meet the requirements of simple and efficient assembly, the shoe has a bilaterally symmetrical structure, and the first ear and the second ear with the same structure are symmetrically arranged on both sides of the inner convex portion; the first ear and the second ear are provided with tension spring mounting holes; adjacent shoes are connected end to end through tension springs and are arranged on the outer circumference of the active disk.

[0020] Specifically, in order to ensure that the tension spring is located at the periphery of the arc-shaped surface in the middle section of the second side surface of the support block, the inner convex portion is arranged in the fan-shaped groove.

[0021] In order to fix the driving disk and the shoe to ensure transmission, it also includes a cover shell and a cover plate. The driving disk and the shoe are both arranged in the cover shell. The driving disk is located at the center. The three shoe blocks are connected end to end through tension springs and surround the outer circumference of the driving disk. The outer circumferential surface of the shoe block is in clearance with the inner circumferential surface of the cover shell.

[0022] The cover plate is connected to the surface of the active disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the active disk;

[0024] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of a centrifugal clutch capable of bidirectional rotation;

[0026] Figure 4 It is a schematic diagram of the internal structure of a centrifugal clutch capable of bidirectional rotation after removing the cover plate;

[0027] Figure 5 It is a schematic diagram of the explosion structure of a centrifugal clutch capable of bidirectional rotation;

[0028] Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure of the middle hoof block;

[0029] In the figure:

[0030] 200, active disk;

[0031] 21. Position-limiting clamping part; 22. Clamping block; 221. First inner inclined surface; 221a. First inclined surface section; 221b. Horizontal vertical surface section; 221c. Second inclined surface section; 222. Second side surface; 223. Arc surface; 23. Fan-shaped clamping groove; 24. Cover plate connecting hole;

[0032] 100, shoe block; 11, inner convex portion; 11a, front end surface; 11b, left side surface; 11c, right side surface; 12, first lug; 13, second lug; 14, tension spring mounting hole;

[0033] 300. tension spring; 400. cover shell; 500. cover plate.

[0034] Explanation of reference numerals: 1. Reference numerals in brackets are spatial structures. For example, reference numeral 23 is a fan-shaped slot formed by reference numerals 221 and 223, which is a spatial structure. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0036] See also Figure 1-4 The utility model provides an active disk, including an active disk body, a plurality of groups of limit clamping branches 21 are arranged at equal intervals on the outer circumference of the active disk; each limit clamping branch 21 is composed of a pair of clamping blocks 22 with the same structure; the pair of clamping blocks 22 are arranged at relative intervals;

[0037] The first inner inclined surfaces 221 of the support blocks 22 intersect with the outer circumferential surfaces of the active disks respectively; a pair of first inner inclined surfaces 221 of the support blocks 22 and the outer circumferential surface segment of the active disk located between the first inner inclined surfaces 221 form a fan-shaped slot 23; the first inner inclined surface 221 includes a first inclined surface segment 221a, a transverse surface segment 221b and a second inclined surface segment 221c connected in sequence, and the second inclined surface segment 221c intersects with the outer circumferential surface of the active disk.

[0038] like Figure 1-Figure 4As shown, the first inner inclined surfaces 221 of the two clamping branches and the outer circumferential surface section of the active disk located between the first inner inclined surfaces 221 of the two clamping branches form a fan-shaped clamping groove 23, and the inner convex portion is correspondingly set on the shoe block, so that the inner convex portion and the fan-shaped clamping groove cooperate with each other. When the active disk 200 rotates at high speed, due to the action of centrifugal force, the shoe block 100 in the active disk 200 moves outward along the direction of the centrifugal force. Regardless of whether the active disk 200 rotates clockwise or counterclockwise, the movement direction of the shoe block will not change. The shoe block 100 always moves outward along the axial direction in the fan-shaped clamping groove, so that the shoe block can adapt to bidirectional rotation transmission. The utility model directly sets a clamping groove around the active disk for limiting the shoe block. There is no fixed connection of bolts or fixing pins in the transfer process of the shoe block and the active disk. Therefore, the assembly process only needs to be installed in the correct position, so the assembly efficiency can be greatly improved.

[0039] In some embodiments, the vertical inclination angle of the first inner inclined surface 221 is 20°~30°; or the vertical inclination angle of the first inclined surface segment 221a is 20°~30°. In this embodiment, the vertical inclination angle of the first inner inclined surface 221 is specifically 23°, so the angle between the first inner inclined surfaces of the two support blocks 22 is 50°.

[0040] In some embodiments, the surface of the support block 22 opposite to the first inner inclined surface 221 is a second side surface 222; the support blocks 22 belonging to different limiter support parts 21 and adjacent to each other are connected as a whole through the second side surfaces 222; the middle sections of the two second side surfaces are circular outwardly facing arc surfaces 223. The design of the arc surface 223 can provide installation space for the tension spring, which is beneficial for faster assembly of the clutch.

[0041] In some embodiments, a cover plate connecting hole 24 is formed at the upper end of the support block 22 to facilitate connection with the cover plate 500 above the active disk 200 . Example

[0042] Embodiment 2 is a centrifugal clutch using embodiment 1. Figure 1-Figure 4 As shown, it is specifically a centrifugal clutch capable of bidirectional rotation, including a shoe 100 and an active disk 200, each sector-shaped slot 23 on the active disk corresponds to a shoe 100, and the shoe 100 is provided with an inner convex portion 11 matching the outer shape of the sector-shaped slot 23; the inner convex portion 11 is clearance-matched with the sector-shaped slot 23; specifically, the inner convex portion 11 includes a front end face 11a, a left side face 11b and a right side face 11c; the vertical angles between the left side face and the right side face and the front end face are 20°-30°; the first inner side inclined surface 221 of the support block 22 matches the left side face 11b and the right side face 11c respectively, and in this embodiment, the vertical angles between the left side face and the right side face and the front end face are 23°.

[0043] In some embodiments, the front end face 11a is an arcuate face. Since the first inner inclined surface 221 of the clamping part close to the outer circumference of the active disk is a transverse straight surface segment 221b and a second inclined surface segment 221c, the arcuate front end face 11a of the inner convex portion of the shoe block contacts the transverse straight surface segment 221b of the first inner inclined surface of the clamping part, thereby forming an installation clearance groove between the front end face of the inner convex portion of the shoe block and the outer circumferential surface of the active disk. The thickness of the installation clearance groove is determined by the length of the second inclined surface segment 221c, which facilitates the installation of the shoe block on the active disk.

[0044] In some embodiments, the shoe block 100 has a bilaterally symmetrical structure, and a first support ear 12 and a second support ear 13 with the same structure are symmetrically arranged on both sides of the inner convex portion; a tension spring mounting hole 14 is provided on the first support ear 12 and the second support ear 13; adjacent shoe blocks 100 are connected end to end through a tension spring 300 and are arranged on the outer circumference of the active disk 200; the tension spring 300 is located on the periphery of the arc surface 223 in the middle section of the second side surface of the clamping block 22, and the inner convex portion is arranged in the fan-shaped clamping groove 23.

[0045] In some embodiments, the bidirectionally rotatable centrifugal clutch further includes a cover shell 400 and a cover plate 500. The active disk 200 and the shoe block 100 are both arranged in the cover shell 400, the active disk 200 is located in the center, and three shoe blocks 100) are connected end to end by tension springs and surround the outer circumference of the active disk 200. The outer circumferential surface of the shoe block 100) is gap-matched with the inner circumferential surface of the cover shell 400; the cover plate 500) is arranged on the surface of the active disk 200), and a closed space for installing the shoe block and the active disk is formed between the cover plate 500 and the cover shell 400.

[0046] Working principle: First, the active disk 200 is rotated rapidly, and the active disk 200 drives the surrounding shoes 100 and the tension spring 300 to rotate rapidly to generate centrifugal force. Since the fan-shaped groove 23 of the active disk 200 matches the left and right sides of the inner convex part 11 of the shoe structure, a surface of smooth contact between the shoe 100 and the outer circumference of the active disk 200 is constructed, which can not only fix the relative position of the active disk 200 and the shoe 100, but also ensure that under the action of centrifugal force, since the left and right sides of the shoe 100 are limited by the limit of the groove 23, they always move outward along the center direction of the circle, so that the shoe 100 is away from the active disk 200, contacts with the cover shell 400 to generate friction, and drives the cover shell 400 to rotate; when the speed of the active disk 200 decreases, the centrifugal force decreases, the tension of the tension spring 300 exceeds the centrifugal force, the tension spring 300 drives the shoe 100 to approach the active disk 200, the shoe 100 is out of contact with the cover shell 400, the power transmission is cut off, and the cover shell 400 stops rotating.

[0047] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0048] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An active disk, comprising an active disk body, characterized in that: A plurality of groups of position-limiting clamping branches (21) are arranged at equal intervals on the outer circumference of the active disk; each of the position-limiting clamping branches (21) is composed of a pair of clamping blocks (22) with the same structure; and the pair of clamping blocks (22) are arranged at a relative interval; The first inner inclined surfaces (221) of the clamping blocks (22) respectively intersect with the outer circumferential surface of the active disk; a pair of first inner inclined surfaces (221) of the clamping blocks (22) and an outer circumferential surface segment of the active disk located between the first inner inclined surfaces (221) together form a fan-shaped clamping groove (23).

2. The active disk according to claim 1, characterized in that: The first inner inclined surface (221) comprises a first inclined surface segment (221a), a transverse surface segment (221b), and a second inclined surface segment (221c) which are connected in sequence, and the second inclined surface segment (221c) intersects with the outer circumferential surface of the active disk.

3. The active disk according to claim 2, characterized in that: The vertical inclination angle of the first inner inclined surface (221) is 20° to 30°; or the vertical inclination angle of the first inclined surface section (221a) is 20° to 30°.

4. The active disk according to claim 1, characterized in that: The surface of the support block (22) opposite to the first inner inclined surface (221) is a second side surface (222); the support blocks (22) belonging to different position-limiting support parts (21) and adjacent to each other are connected as a whole via the second side surface (222); The middle sections of the two second side surfaces are circular outwardly facing arc-shaped surfaces (223).

5. The active disk according to any one of claims 1 to 4, characterized in that: A cover plate connecting hole (24) is provided at the upper end of the support block (22).

6. A centrifugal clutch capable of bidirectional rotation, comprising a shoe (100), characterized in that: The active disk (200) comprises any one of claims 1 to 5, each of the fan-shaped slots (23) corresponds to a shoe block (100), and the shoe block (100) is provided with an inner convex portion (11) matching the outer shape of the fan-shaped slot (23); the inner convex portion (11) and the fan-shaped slot (23) are clearance-matched.

7. The bidirectionally rotatable centrifugal clutch according to claim 6, characterized in that: The inner convex portion (11) comprises a front end surface (11a), a left side surface (11b) and a right side surface (11c); the vertical angles between the left side surface and the right side surface and the front end surface are 20° to 30°.

8. The bidirectionally rotatable centrifugal clutch according to claim 6, characterized in that: The shoe block (100) is a bilaterally symmetrical structure, and a first support ear (12) and a second support ear (13) having the same structure are symmetrically arranged on both sides of the inner convex portion; the first support ear (12) and the second support ear (13) are both provided with tension spring mounting holes (14); adjacent shoe blocks (100) are connected end to end via tension springs (300) and are arranged on the outer circumference of the active disk (200).

9. The bidirectionally rotatable centrifugal clutch according to claim 8, characterized in that: The tension spring (300) is located on the periphery of the arc-shaped surface (223) in the middle section of the second side surface of the support block (22), and the inner convex portion (11) is arranged in the fan-shaped clamping groove (23).

10. The bidirectionally rotatable centrifugal clutch according to claim 9, characterized in that: It also includes a cover shell (400) and a cover plate (500), the active disk (200) and the shoe block (100) are both arranged in the cover shell (400), the active disk (200) is located at the center, the three shoe blocks (100) are connected end to end by tension springs and surround the outer circumference of the active disk (200), and the outer circumferential surface of the shoe block (100) is clearance-matched with the inner circumferential surface of the cover shell (400); The cover plate (500) is arranged on the surface of the active disk (200).

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