Transmission mechanism and speed reducer with same

Abstract

The utility model relates to the technical field of transmission, provides a transmission mechanism and a speed reducer with the transmission mechanism, and aims to solve the problem that a worm and gear assembly is not favorable for torque transmission between a motor and a main shaft of a photovoltaic support. The transmission mechanism comprises a base with a cylindrical cavity, a driving shaft and a driven shaft which are coaxially arranged in the cavity in a penetrating mode, a plurality of shifting blocks distributed on the opposite end faces of the driving shaft and the driven shaft around the axis, and columnar blocks inserted between the adjacent shifting blocks in a one-to-one correspondence mode. The shifting block comprises a first shifting block and a second shifting block which are distributed outwards in the radial direction and are directly and fixedly connected, two locking positions, a non-locking position between the locking positions, an elastic piece at the non-locking position and movable pieces on the two sides of the elastic piece are arranged between the limiting face, away from the axis of the driven shaft, of the columnar block and the inner wall of the cavity, and the movable pieces are arranged on the two sides of the elastic piece. When the driving shaft is static, the elastic piece enables the movable piece to be in the locking position so that the driven shaft can be locked when having the rotating trend, and when the driving shaft rotates, the second shifting block and the first shifting block push the movable piece and the columnar block in sequence.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission technical field, specifically provide a transmission mechanism and the speed reducer with the transmission mechanism of having. BACKGROUND

[0002] Solar photovoltaic module is usually installed on photovoltaic support, motor is driven connection with the main shaft of photovoltaic support, in order to drive the main shaft of photovoltaic support to rotate through motor, so that solar cell panel in photovoltaic module can be always perpendicular to the light of sunlight, improve the absorption and utilization efficiency of solar cell panel to solar energy. When encountering extreme weather such as strong wind, wind load acts on solar cell panel, so that the main shaft of photovoltaic support produces corresponding torque and is transmitted to motor, thereby influence the use reliability of motor.

[0003] In order to solve the above problem, motor and the main shaft of photovoltaic support are driven connection through worm gear reducer, utilize the self locking of worm gear assembly to avoid the torque produced by the main shaft of photovoltaic support transmission to motor. However, the torque transmission efficiency of worm gear assembly is low, is not conducive to the torque transmission between motor and the main shaft of photovoltaic support.

[0004] Therefore, the prior art needs a new technical scheme to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the above technical problem, that is, solving the problem that worm gear assembly is not conducive to the torque transmission between motor and the main shaft of photovoltaic support.

[0006] In a first aspect, the utility model provides a kind of transmission mechanism, the transmission mechanism includes: pedestal, it has cylindrical cavity;Driving shaft, with the cavity coaxial and its output end inserts the cavity, the end face of the output end is formed with multiple push blocks distributed around its axis, each the push block includes sequentially distributed, directly fixed connection first push block and second push block along the radial direction of the end face;Driven shaft, with the cavity coaxial and its input end inserts the cavity, the end face of the input end is formed with the columnar block distributed around its axis, one by one correspondingly inserted between adjacent two the push block, each the columnar block has the limiting surface away from the axis of the driven shaft, along the circumferential direction of the driven shaft, between each the limiting surface and the inner wall of the cavity there are two locking positions and the non-locking position between the locking position, elastic member located in the non-locking position and the movable element only can move between the locking position and the non-locking position on the two sides of the elastic member, the elastic member is used to make the movable element be in the locking position when the driving shaft is stationary, so that the driven shaft reaches locking state when the driven shaft has rotation tendency;The columnar block and the locking position are located on the movement path of the first push block and the second push block respectively, the push block is set to be able to first push the movable element away from the locking position by the second push block during the rotation of the driving shaft and then push the columnar block rotates around the axis of the driven shaft by the first push block.

[0007] In the preferred technical solutions of the above transmission mechanism, the first push block and the second push block are integrally formed.

[0008] In the preferred technical solutions of the above transmission mechanism, the second push block is a fan ring-shaped push block with the intermediate axis collinear with the axis of the driving shaft, and the outer diameter arc surface of the fan ring-shaped push block is coplanar with the outer peripheral surface of the output end of the driving shaft.

[0009] In the preferred technical solutions of the above transmission mechanism, the first push block is a fan ring-shaped push block with the intermediate axis collinear with the axis of the driving shaft, and the columnar block has side planes located on the two sides of the limiting surface along the circumferential direction of the driven shaft, and the side planes extend along the radial direction of the driven shaft.

[0010] In the preferred technical solutions of the above transmission mechanism, the end face of the output end extends towards the input end with a support shaft, the outer wall of the support shaft is a cylindrical surface coaxial with the driving shaft, the columnar block has a side surface opposite to and parallel with the axis of the driven shaft, and the side surface is in sliding fit with the cylindrical surface.

[0011] In the preferred technical solutions of the above transmission mechanism, the side surface is a circular arc surface in line contact with the cylindrical surface, or the side surface is a circular arc surface in surface contact with the cylindrical surface.

[0012] In the preferred technical solution of the transmission mechanism, the first pushing block is directly fixedly connected with the supporting shaft or is integrally formed.

[0013] In the preferred technical solution of the transmission mechanism, the movable part is a cylindrical part; and / or the elastic part is a V-shaped elastic sheet.

[0014] In the case of adopting the technical solution, the transmission mechanism comprises a base having a cylindrical cavity, a driving shaft coaxial with the cavity and having an output end inserted into the cavity, an end face of the output end being formed with a plurality of pushing blocks distributed around an axis of the driving shaft, each pushing block comprising first and second pushing blocks directly fixedly connected and sequentially distributed along a radial direction of the end face, a driven shaft coaxial with the cavity and having an input end inserted into the cavity, an end face of the input end being formed with cylindrical blocks distributed around an axis of the driven shaft and one-to-one corresponding to the pushing blocks, each cylindrical block having a limiting face away from the axis of the driven shaft, between each limiting face and an inner wall of the cavity, there are two locking positions, a non-locking position between the locking positions, an elastic part located at the non-locking position, and movable parts located at both sides of the elastic part and only movable between the locking positions and the non-locking position, the elastic part being used to make the movable parts be in the locking positions when the driving shaft is stationary, so as to make the driven shaft reach a locked state when the driven shaft has a rotating tendency; the cylindrical blocks and the locking positions are located on moving paths of the first and second pushing blocks, respectively, and the pushing blocks are arranged to be able to push the movable parts away from the locking positions through the second pushing blocks and then push the cylindrical blocks to rotate around the axis of the driven shaft through the first pushing blocks during rotation of the driving shaft.

[0015] Through such an arrangement, the driving shaft is coaxial with the driven shaft, the end face of the output end of the driving shaft is opposite to the end face of the input end of the driven shaft, the pushing blocks on the end face of the output end of the driving shaft and the cylindrical blocks on the end face of the input end of the driven shaft are alternately distributed around the axis of the driving shaft; when the driving shaft rotates, the second pushing block in the pushing blocks contacts with the movable part in front of and close to the rotating path of the second pushing block, pushes the movable part to move from the locking position to the non-locking position along the limiting face on the cylindrical block, the elastic part between the movable parts is compressed, with continuous rotation of the driving shaft, the first pushing block in the pushing blocks contacts with the cylindrical block and pushes the cylindrical block to rotate around the axis of the driven shaft, so as to realize torque transmission between the driving shaft and the driven shaft, the coaxial torque transmission manner of the driving shaft and the driven shaft makes the torque transmission efficiency of the transmission mechanism of the utility model far greater than that of the worm gear assembly.

[0016] The plurality of poking blocks are distributed around the axis of the driven shaft on the end face of the output end, the plurality of columnar blocks are distributed around the axis of the driving shaft on the end face of the input end, and the plurality of columnar blocks are inserted between two adjacent poking blocks one by one, so that the plurality of poking blocks and the plurality of columnar blocks are alternately distributed around the axis of the driving shaft. During torque transmission, the force is distributed around the axes of the driving shaft and the driven shaft, and the torque is transmitted by multiple points. Compared with single-point force torque transmission, a larger torque can be transmitted between the driving shaft and the driven shaft without changing the material of the driving shaft and the driven shaft.

[0017] Preferably, the plurality of poking blocks are uniformly distributed around the axis of the driven shaft on the end face of the output end, and the plurality of columnar blocks are uniformly distributed around the axis of the driving shaft on the end face of the input end.

[0018] Through such an arrangement, during torque transmission, the force is uniformly distributed around the axes of the driving shaft and the driven shaft, so that the force on the driving shaft and the driven shaft is more balanced, further reducing the risk of deviation due to poor force balance of the driving shaft and the driven shaft, making the rotation of the driving shaft and the driven shaft more smooth, and ensuring the stability of the transmission.

[0019] The first poking block and the second poking block are directly fixedly connected, which can improve the rigidity and strength of the first poking block and the second poking block, reduce the deformation of the first poking block and the second poking block when they are subjected to force, improve the ability of the second poking block to push the movable part from the locking position to the non-locking position, prolong the service life of the first poking block and the second poking block, and further improve the torque transmission capacity between the driving shaft and the driven shaft.

[0020] When the driven shaft stops rotating, the elastic member restores the elastic deformation, so that the movable part moves to the locking position. When the driven shaft rotates under the action of the load, the limiting surface on the columnar block and the movable part produce a small amount of relative movement, the radial distance between the area where the limiting surface contacts the movable part and the area where the inner wall of the cavity contacts the movable part is further reduced, so that the limiting surface and the inner wall of the cavity generate a larger extrusion force on the movable part, thereby keeping the driven shaft, the movable part and the base relatively stationary, achieving locking of the driven shaft, and avoiding continuous rotation of the driven shaft.

[0021] Preferably, the first poking block and the second poking block are integrally formed.

[0022] Through such an arrangement, the rigidity and strength of the first poking block and the second poking block can be further improved, the deformation of the first poking block and the second poking block when they are subjected to force can be reduced, the ability of the second poking block to push the movable part from the locking position to the non-locking position can be improved, the service life of the first poking block and the second poking block can be prolonged, and the torque transmission capacity between the driving shaft and the driven shaft can be further improved.

[0023] Preferably, the second shifting block is a sector ring-shaped shifting block with a middle axis line in line with the axis line of the driving shaft, and the outer diameter arc surface of the sector ring-shaped shifting block is coplanar with the outer peripheral surface of the output end of the driving shaft.

[0024] It should be noted that the sector ring-shaped shifting block refers to a shifting block extending along the axis line of the driving shaft and having a sector ring-shaped cross section perpendicular to the axis line of the driving shaft, and the middle axis line of the sector ring-shaped shifting block refers to the rotary line of the arc surface of the sector ring-shaped shifting block.

[0025] With such an arrangement, the first shifting block and the second shifting block are further away from the axis line of the driving shaft, so that in the state where the first shifting block pushes the columnar block, the force arm of the acting force of the first shifting block is longer, and in the case where the acting force is unchanged, the transmitted torque is larger. Therefore, without changing the material and diameter of the driving shaft and the driven shaft, the maximum torque that the transmission mechanism can transmit is larger, thereby improving the ability of the transmission mechanism to transmit torque.

[0026] Preferably, the first shifting block is a sector ring-shaped shifting block with a middle axis line in line with the axis line of the driving shaft, and the columnar block has side planes on both sides of the limiting surface along the circumferential direction of the driven shaft, and the side planes extend along the radial direction of the driven shaft.

[0027] With such an arrangement, when the first shifting block rotates to contact the columnar block along with the driving shaft, the side plane of the first shifting block is just fitted with the corresponding side plane of the columnar block. Since the side planes extend along the radial direction of the driven shaft, the acting force between the side plane of the first shifting block and the corresponding side plane of the columnar block is just perpendicular to the radial direction of the driven shaft, that is, the acting force between the side plane of the first shifting block and the corresponding side plane of the columnar block is perpendicular to the force arm of the acting force, thereby making the driving shaft and the driven shaft more effectively transmit torque.

[0028] Preferably, the end surface of the output end extends a support shaft towards the input end, the outer wall of the support shaft is a cylindrical surface coaxial with the driving shaft, the columnar block has a side surface opposite to and parallel to the axis line of the driven shaft, and the side surface is in sliding fit with the cylindrical surface.

[0029] With such an arrangement, the support shaft can support the columnar block, and when the torque is transmitted between the driving shaft and the driven shaft, the risk of the columnar block being deformed by a larger acting force and deviating towards the axis line of the driven shaft is reduced, thereby improving the stability and reliability of the torque transmission between the driving shaft and the driven shaft. In addition, this can also more effectively ensure the coaxiality of the driving shaft and the driven shaft, and ensure the smoothness of the torque transmission between the driving shaft and the driven shaft.

[0030] The side surface is an arc surface in line contact with the cylindrical surface, or the side surface is an arc surface in surface contact with the cylindrical surface.

[0031] When the side surface is a circular arc surface in contact with the cylindrical surface, the contact area between the side surface and the cylindrical surface can be reduced, thereby reducing the friction therebetween and reducing the loss during torque transmission.

[0032] Preferably, the first shifting block is directly fixedly connected with the support shaft or is integrally formed.

[0033] Through such an arrangement, the rigidity and strength of the first shifting block and the second shifting block can be further improved, the deformation of the first shifting block and the second shifting block when subjected to force can be reduced, the ability of the second shifting block to push the movable member from the locking position to the non-locking position can be improved, the service life of the first shifting block and the second shifting block can be prolonged, and the ability of torque transmission between the driving shaft and the driven shaft can be improved.

[0034] Preferably, the movable member is a cylindrical member.

[0035] Through such an arrangement, the second shifting block can more easily drive the movable member to move from the locking position to the non-locking position.

[0036] In a second aspect, the utility model also provides a speed reducer, the speed reducer includes speed reduction gear set and the transmission mechanism of any one of above-mentioned technical schemes, the output end of speed reduction gear set is driven with the input end of driving shaft connection, or the input end of speed reduction gear set is driven with the output end of driven shaft connection.

[0037] It needs to be explained that the speed reducer has all the technical effects of the transmission mechanism of any one of the above technical solutions, which will not be repeated here.

[0038] In the above preferred technical solutions of the speed reducer, the transmission mechanism includes two driving shafts and two driven shafts, the two driving shafts are located in the base and between the two driven shafts, and the two driving shafts are synchronously connected through an intermediate shaft; the speed reduction gear set includes a first speed reduction gear set and a second speed reduction gear set, the first speed reduction gear set includes a first driving bevel gear and a first driven bevel gear which mesh with each other, the second speed reduction gear set includes a second driving bevel gear and a second driven bevel gear which mesh with each other, and the first driven bevel gear and the second driven bevel gear are both arranged on the intermediate shaft and coaxial with the intermediate shaft; the speed reducer further includes a first driving motor and a second driving motor, the output shafts of the first driving motor and the second driving motor are both inserted from the side wall of the base and are fixedly connected with the first driving bevel gear and the second driving bevel gear coaxially, respectively.

[0039] With this configuration, when the reducer is used to drive the main shaft of the photovoltaic bracket, the two driven shafts of the reducer are connected in series on the main shaft of the photovoltaic bracket. The rotation of the intermediate shaft is driven by the first and second drive motors through the reduction gear set, which in turn causes the drive shaft to drive the driven shaft to rotate, thus driving the rotation of the main shaft of the photovoltaic bracket through the two driven shafts. This increases the output torque of the reducer and improves its driving capability. Attached Figure Description

[0040] The preferred embodiments of this utility model will now be described with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a schematic diagram of the structure of a speed reducer according to one embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the reducer structure after removing the base according to one embodiment of the present invention;

[0043] Figure 3 This is an exploded view of a speed reducer according to one embodiment of the present invention;

[0044] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0045] Figure 5 yes Figure 3 A magnified view of part B in the middle;

[0046] Figure 6 yes Figure 3 A magnified view of part C in the middle;

[0047] Figure 7 This is a schematic diagram of the structure of the first drive shaft in a speed reducer according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of the first driven shaft in a speed reducer according to an embodiment of the present invention;

[0049] Figure 9 This is a front view of the assembly structure of the first drive shaft and the first driven shaft in a speed reducer according to an embodiment of the present invention;

[0050] Figure 10 It is along Figure 9 A cross-sectional view of the DD plane.

[0051] List of reference numerals in the attached diagram:

[0052] 1, base; 11, cavity; 12, mounting hole; 21, first end cover; 211, first leg; 22, second end cover; 221, second leg; 31, first driving shaft; 311, first push block; 3111, first push block a; 3112, second push block a; 312, first support shaft; 3121, first shaft hole; 32, second driving shaft; 41, first driven shaft; 411, first columnar block; 4111, first limiting surface; 4112, first circular surface; 4113, first side plane; 42, second driven shaft; 421, second columnar block; 5, intermediate shaft; 61, first reduction gear set; 611, first driving bevel gear; 612, first driven bevel gear; 62, second reduction gear set; 621, second driving bevel gear; 622, second driven bevel gear; 71, first driving motor; 711, first bearing; 72, second driving motor; 721, second bearing; 81, first V-shaped elastic sheet; 82, second V-shaped elastic sheet; 91, first roller; 92, second roller. DETAILED DESCRIPTION

[0053] First, those skilled in the art should understand that the embodiments described below are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0054] It should be noted that in the description of the utility model, the terms "left", "right" and the like indicating the direction or positional relationship of the terms are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be direct connection, or indirect connection. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0056] Based on the problem mentioned in the background art that worm gear assemblies are not conducive to torque transmission between the motor and the main shaft of the photovoltaic bracket, this utility model provides a transmission mechanism, which includes: a base having a cylindrical cavity; a drive shaft coaxial with the cavity and its output end inserted into the cavity, with multiple actuating blocks distributed around its axis on the end face of the output end, each actuating block including a first actuating block and a second actuating block that are directly fixedly connected and distributed radially outward along the end face; and a driven shaft coaxial with the cavity and its input end inserted into the cavity, with columnar blocks distributed around its axis and correspondingly inserted between two adjacent actuating blocks on the end face of the input end, each columnar block having... There are limiting surfaces that are away from the axis of the driven shaft. Along the circumference of the driven shaft, each limiting surface has two locking positions, a non-locking position between the locking positions, an elastic element located in the non-locking position, and movable elements located on both sides of the elastic element that can only move between the locking and non-locking positions. The elastic element is used to lock the movable element when the driving shaft is stationary so that the driven shaft can reach the locked state when it has a tendency to rotate. The columnar block and the locking position are located on the moving paths of the first and second paddle blocks, respectively. The paddle block is configured to first push the movable element to move away from the locking position through the second paddle block and then push the columnar block to rotate around the axis of the driven shaft through the first paddle block during the rotation of the driving shaft.

[0057] With this configuration, the driving shaft and driven shaft are coaxial, and the end face of the output end of the driving shaft faces the end face of the input end of the driven shaft. The actuating block on the end face of the output end of the driving shaft and the columnar block on the end face of the input end of the driven shaft are alternately distributed around the axis of the driving shaft. When the driving shaft rotates, the second actuating block in the actuating block contacts the movable part in front of it and close to it, pushing the movable part to move from the locked position to the unlocked position along the limiting surface on the columnar block. The elastic element between the movable parts is compressed. As the driving shaft continues to rotate, the first actuating block in the actuating block contacts the columnar block and pushes the columnar block to rotate around the axis of the driven shaft, thereby realizing the torque transmission between the driving shaft and the driven shaft. The way in which the driving shaft and the driven shaft transmit torque coaxially makes the torque transmission efficiency of the transmission mechanism of this utility model much greater than that of the worm gear assembly.

[0058] On the other hand, this utility model also provides a speed reducer, which includes a speed reduction gear set and the transmission mechanism described in the above technical solution. The output end of the speed reduction gear set is driven to be connected to the input end of the drive shaft, or the input end of the speed reduction gear set is driven to be connected to the output end of the driven shaft.

[0059] The following reference Figures 1 to 10 This invention will be described in detail in conjunction with the speed reducer. Figure 1 This is a schematic diagram of the structure of a speed reducer according to one embodiment of the present invention; Figure 2This is a schematic diagram of the reducer structure after removing the base according to one embodiment of the present invention; Figure 3 This is an exploded view of a speed reducer according to one embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of part A in the middle; Figure 5 yes Figure 3 A magnified view of part B in the middle; Figure 6 yes Figure 3 A magnified view of part C in the middle; Figure 7 This is a schematic diagram of the structure of the first drive shaft in a speed reducer according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first driven shaft in a speed reducer according to an embodiment of the present invention; Figure 9 This is a front view of the assembly structure of the first drive shaft and the first driven shaft in a speed reducer according to an embodiment of the present invention; Figure 10 It is along Figure 9 A cross-sectional view of the DD plane.

[0060] like Figures 1 to 3 As shown, the reducer includes a transmission mechanism, a reduction gear set, and a drive motor. The transmission mechanism includes a base 1, a first drive shaft 31, a first driven shaft 41, a second drive shaft 32, and a second driven shaft 42. The base 1 is cylindrical in shape and has a cylindrical cavity 11. Annular first end caps 21 and second end caps 22 are fixedly connected to both ends of the base 1. The outer edge of the first end cap 21 has two integrally formed first legs 211, and the outer edge of the second end cap 22 has two integrally formed second legs 221. The first legs 211 and second legs 221 are used to fix the reducer to the installation site, thus fixing the base 1 in a fixed state. The first drive shaft 31 and the second drive shaft 32 are both located inside the cavity 11. The input ends of the first driven shaft 41 and the second driven shaft 42 pass through both ends of the cavity 11 and are respectively driven and connected to the output ends of the first drive shaft 31 and the second drive shaft 32. The first drive shaft 31 and the second drive shaft 32 are synchronously connected through an intermediate shaft 5. The output ends of the first driven shaft 41 and the second driven shaft 42 pass through the middle of the first end cover 21 and the second end cover 22, respectively. The first driving shaft 31, the second driving shaft 32, the first driven shaft 41 and the second driven shaft 42 are coaxially rotatably connected to the inner wall of the cavity 11 through bearings (not shown in the figure).

[0061] like Figure 3 and Figure 5As shown, the speed reduction gear set includes a first speed reduction gear set 61 and a second speed reduction gear set 62, the first speed reduction gear set 61 includes a first driving bevel gear 611 and a first driven bevel gear 612 meshing with each other, the second speed reduction gear set 62 includes a second driving bevel gear 621 and a second driven bevel gear 622 meshing with each other, the first driven bevel gear 612 and the second driven bevel gear 622 are both arranged on the shaft segment of the intermediate shaft 5 between the first driving shaft 31 and the second driving shaft 32 and fixedly connected with the intermediate shaft 5. As shown Figures 1 to 3 As shown, the outer wall of the base 1 is provided with two symmetrical mounting holes 12, the driving motor includes a first driving motor 71 and a second driving motor 72, the part of the bodies of the first driving motor 71 and the second driving motor 72 close to the output shafts are fixedly connected to the two mounting holes 12 respectively, the two mounting holes 12 are respectively provided with a first bearing 711 and a second bearing 721 corresponding to the first driving motor 71 and the second driving motor 72, the output shafts of the first driving motor 71 and the second driving motor 72 pass through the inner rings of the first bearing 711 and the second bearing 721 respectively and are coaxially fixedly connected with the first driving bevel gear 611 and the second driving bevel gear 621 respectively.

[0062] As shown Figure 4 and Figure 7 As shown, the end face of the output end of the first driving shaft 31 is formed with four first push blocks 311 extending along the axial direction thereof towards the input end of the first driven shaft 41, the four first push blocks 311 are uniformly distributed around the axis of the first driving shaft 31, each first push block 311 includes a first push block a3111 and a second push block a3112 distributed in the radial direction of the end face of the output end of the first driving shaft 31 in sequence. The second push block a3112 is a sector ring-shaped push block with the intermediate axis collinear with the axis of the first driving shaft 31, the outer diameter circular surface of the sector ring-shaped push block is coplanar with the outer peripheral surface of the output end of the first driving shaft 31. The first push block a3111 is a sector ring-shaped push block with the intermediate axis collinear with the axis of the first driving shaft 31. The first push block a3111 and the second push block a3112 are both symmetrical about the same plane passing through the axis of the first driving shaft 31. The first push block a3111 and the second push block a3112 are directly fixedly connected. Specifically, the first push block a3111 and the second push block a3112 are integrally formed to realize the direct fixed connection therebetween. The end face of the output end of the first driving shaft 31 is provided with a first support shaft 312 extending along the axial direction thereof towards the input end of the first driven shaft 41, the outer wall of the first support shaft 312 is a cylindrical surface coaxial with the first driving shaft 31, the first support shaft 312 is integrally formed with the first push block a3111. The first driving shaft 31 is formed with a first shaft hole 3121 extending along the axial direction thereof coaxial with the axis thereof and penetrating the first support shaft 312, one end of the intermediate shaft 5 penetrates into the first shaft hole 3121 so as to realize the coaxial fixed connection between the intermediate shaft 5 and the first driving shaft 31.

[0063] As shown in Figure 3 and Figure 8 , four first cylindrical blocks 411 are formed on the end face of the input end of the first driven shaft 41 along the axial direction thereof towards the output end of the first driving shaft 31, the four first cylindrical blocks 411 are evenly distributed around the axis of the first driven shaft 41, and the four first cylindrical blocks 411 are inserted into the adjacent two first driving blocks 311 one by one, so that the first driving blocks 311 and the first cylindrical blocks 411 are alternately distributed around the axis of the first driving shaft 31 (see Figure 10 ), thereby achieving the driving connection between the first driving shaft 31 and the first driven shaft 41 (as shown in Figure 9 ). As shown in Figure 8 and Figure 10 , each first cylindrical block 411 has a first limiting face 4111 away from the axis of the first driven shaft 41, a first side face opposite to and parallel to the axis of the first driven shaft 41, and two first side planes 4113 on both sides of the first limiting face 4111 along the circumferential direction of the first driven shaft 41, the first limiting face 4111 is an arc face symmetrically extending from the middle to both sides, the first side face is a first circular arc face 4112 in line contact with the cylindrical face of the first support shaft 312, the first circular arc face 4112 is in sliding fit with the cylindrical face of the first support shaft 312, and the first side plane 4113 extends along the radial direction of the first driven shaft 41.

[0064] As shown in Figure 10 , a first V-shaped elastic sheet 81 as a first elastic member is arranged between each first limiting face 4111 and the inner wall of the cavity 11, and two first rollers 91 as first movable members are arranged on both sides of the first V-shaped elastic sheet 81 along the circumferential direction of the first driven shaft 41. Along the circumferential direction of the first driven shaft 41, the radial distance between each first limiting face 4111 and the inner wall of the cavity 11 gradually decreases from the middle to both sides to form two locking positions and a non-locking position between the locking positions, and the first V-shaped elastic sheet 81 is used to drive the first roller 91 to move to the locking position. The first cylindrical block 411 and the locking position are respectively located on the movement path of the first driving block a3111 and the second driving block a3112. The first driving block 311 can first push the first roller 91 away from the locking position through the second driving block a3112 and then push the first cylindrical block 411 to rotate around the axis of the first driven shaft 41 through the first driving block a3111 during the rotation of the first driving shaft 31.

[0065] As shown in Figure 6 and referring to Figure 7The second drive shaft 32 has the same structure as the first drive shaft 31. Four second actuating blocks (not shown in the figure) extend axially towards the input end of the second driven shaft 42 on the end face of the output end of the second drive shaft 32. These four actuating blocks are evenly distributed around the axis of the second drive shaft 32. Each second actuating block includes a first actuating block b (not shown in the figure) and a second actuating block b (not shown in the figure) sequentially distributed radially outward (i.e., radially away from the center) along the end face of the output end of the second drive shaft 32. The second actuating block b is a fan-shaped annular actuating block whose intermediate axis is collinear with the axis of the second drive shaft 32. The outer diameter arc surface of this fan-shaped annular actuating block is coplanar with the outer circumferential surface of the output end of the second drive shaft 32. The first actuating block b is also a fan-shaped annular actuating block whose intermediate axis is collinear with the axis of the second drive shaft 32. Both the first actuating block b and the second actuating block b are symmetrical about the same plane passing through the axis of the second drive shaft 32. The first actuating block b and the second actuating block b are directly fixedly connected. Specifically, the first actuating block b and the second actuating block b are integrally formed to achieve their direct fixed connection. A second support shaft (not shown in the figure) extends axially toward the input end of the second driven shaft 42 from the output end face of the second drive shaft 32. The outer wall of the second support shaft is a cylindrical surface coaxial with the second drive shaft 32. The second support shaft is integrally formed with the first lever block b. A second shaft hole (not shown in the figure) is formed on the second drive shaft 32, extending axially, coaxial with its axis, and penetrating the second support shaft. The other end of the intermediate shaft 5 passes through the second shaft to achieve a coaxial fixed connection between the intermediate shaft 5 and the second drive shaft 32.

[0066] like Figure 3 As shown and referenced Figure 8 The second driven shaft 42 has the same structure as the first driven shaft 41. Four second columnar blocks 421 are formed on the end face of the input end of the second driven shaft 42, extending axially towards the output end of the second driving shaft 32. These four second columnar blocks 421 are evenly distributed around the axis of the second driven shaft 42, and are inserted one-to-one between two adjacent second actuating blocks. This alternating distribution of the second actuating blocks and the second columnar blocks 421 around the axis of the second driving shaft 32 achieves the driving connection between the second driving shaft 32 and the second driven shaft 42. (Refer to...) Figure 8 and Figure 10 Each second columnar block 421 has a second limiting surface opposite to the axis of the second driven shaft 42, a second side surface facing the axis of the second driven shaft 42 and parallel to the axis of the second driven shaft 42, and two second side planes located on both sides of the second limiting surface along the circumference of the second driven shaft 42. The second limiting surface is an arc surface that extends symmetrically from the middle to both sides. The second side surface is a second arc surface that contacts the cylindrical surface of the second support shaft. The second arc surface slides in fit with the cylindrical surface of the second support shaft. The second side planes extend radially along the second driven shaft 42.

[0067] like Figure 6shown and with reference to Figure 10 A second V-shaped spring 82 as a second elastic member is arranged between each second limiting surface and the inner wall of the cavity 11, and two second rollers 92 as second movable members are arranged on both sides of the second V-shaped spring 82 along the circumference of the second driven shaft 42. Along the circumference of the second driven shaft 42, the radial distance between each second limiting surface and the inner wall of the cavity 11 gradually decreases from the middle to both sides to form two locking positions and a non-locking position between the locking positions. The second V-shaped spring 82 is used to drive the second roller 92 to move to the locking position. The second cylindrical block 421 and the locking position are located on the movement path of the first and second shifting blocks b, respectively. The second shifting block can first push the second roller 92 away from the locking position through the second shifting block b and then push the second cylindrical block 421 to rotate around the axis of the second driven shaft 42 through the first shifting block b during the rotation of the second driving shaft 32.

[0068] In the use state, the output ends of the first and second driven shafts 41 and 42 of the speed reducer are coaxially driven and connected with the rotating shaft of the load. When the speed reducer is working, one of the first and second driving motors 71 and 72 rotates forward and the other rotates reversely, and the rotation speeds of the first and second driving motors 71 and 72 are the same, so that the first and second driven bevel gears 612 and 622 rotate synchronously around the axis of the intermediate shaft 5, and the intermediate shaft 5 rotates synchronously, and the first and second driving shafts 31 and 32 rotate synchronously with the intermediate shaft 5.

[0069] The second shifting block a 3112 in the first shifting block 311 contacts the first roller 91 close to it in front of its rotation path, pushes the first roller 91 to move along the first limiting surface 4111 on the first cylindrical block 411 from the locking position to the non-locking position, and the first V-shaped spring 81 between the first rollers 91 is compressed. With the continuous rotation of the first driving shaft 31, the first shifting block a 3111 in the first shifting block 311 contacts and pushes the first cylindrical block 411 to rotate around the axis of the first driven shaft 41.

[0070] The second shifting block b in the second shifting block contacts the second roller 92 close to it in front of its rotation path, pushes the second roller 92 to move along the second limiting surface on the second cylindrical block 421 from the locking position to the non-locking position, and the second V-shaped spring 82 between the second rollers 92 is compressed. With the continuous rotation of the second driving shaft 32, the first shifting block b in the second shifting block contacts and pushes the second cylindrical block 421 to rotate around the axis of the second driven shaft 42.

[0071] When the speed reducer is not working, the first driving motor 71 and the second driving motor 72 stop rotating. The first V-shaped elastic sheet 81 restores the elastic deformation, so that the first roller 91 moves to the locking position; the second V-shaped elastic sheet 82 restores the elastic deformation, so that the second roller 92 moves to the locking position. When the first driven shaft 41 rotates under the action of the load, the first limiting surface 4111 on the first columnar block 411 produces a small amount of relative movement with the first roller 91, the radial distance between the area where the first limiting surface 4111 contacts the first roller 91 and the area where the inner wall of the cavity 11 contacts the first roller 91 is further reduced, so that the first limiting surface 4111 and the inner wall of the cavity 11 produce a larger extrusion force on the first roller 91, thereby making the first driven shaft 41, the first roller 91 and the base 1 relatively stationary, realizing the locking of the first driven shaft 41, and avoiding the continuous rotation of the first driven shaft 41. When the second driven shaft 42 rotates under the action of the load, the second limiting surface on the second columnar block 421 produces a small amount of relative movement with the second roller 92, the radial distance between the area where the second limiting surface contacts the second roller 92 and the area where the inner wall of the cavity 11 contacts the second roller 92 is further reduced, so that the second limiting surface and the inner wall of the cavity 11 produce a larger extrusion force on the second roller 92, thereby making the second driven shaft 42, the second roller 92 and the base 1 relatively stationary, realizing the locking of the second driven shaft 42, and avoiding the continuous rotation of the second driven shaft 42.

[0072] Through the above-mentioned arrangement of the transmission mechanism in the speed reducer, the coaxial transmission of torque between the driving shaft and the driven shaft is realized, and the torque transmission efficiency is much higher than that of the worm gear assembly. When the driven shaft stops rotating but has a tendency to rotate, the driven shaft is locked to prevent it from continuing to rotate.

[0073] The four first driving blocks 311 are uniformly distributed around the axis of the first driven shaft 41 on the end face of the output end of the first driving shaft 31, the four first columnar blocks 411 are uniformly distributed around the axis of the first driving shaft 31 on the end face of the input end of the first driven shaft 41, and the four first columnar blocks 411 are inserted one by one between adjacent two first driving blocks 311, so that the four first driving blocks 311 and the four first columnar blocks 411 are alternately distributed around the axis of the first driving shaft 31. During the transmission of torque, the force is uniformly distributed around the axes of the first driving shaft 31 and the first driven shaft 41, so that the stress on the first driving shaft 31 and the first driven shaft 41 is more balanced, the risk of imbalance between the first driving shaft 31 and the first driven shaft 41 is reduced, the rotation of the first driving shaft 31 and the first driven shaft 41 is smoother, and the stability of the transmission is ensured. Multiple points generate force to realize the transmission of torque, and compared with single-point force to realize the transmission of torque, the first driving shaft 31 and the first driven shaft 41 can transmit greater torque without changing the material of the first driving shaft 31 and the first driven shaft 41.

[0074] The four second driving blocks are uniformly distributed around the axis of the second driven shaft 42 on the end face of the output end of the second driving shaft 32, the four second columnar blocks 421 are uniformly distributed around the axis of the second driving shaft 32 on the end face of the input end of the second driven shaft 42, and the four second columnar blocks 421 are inserted one by one between adjacent two second driving blocks, so that the four second driving blocks and the four second columnar blocks 421 are alternately distributed around the axis of the second driving shaft 32. During torque transmission, the force is uniformly distributed around the axes of the second driving shaft 32 and the second driven shaft 42, so that the force on the second driving shaft 32 and the second driven shaft 42 is more balanced, the risk of deviation due to poor force balance of the second driving shaft 32 and the second driven shaft 42 is reduced, the rotation of the second driving shaft 32 and the second driven shaft 42 is more smooth, and the stability of transmission is ensured. Multiple points generate force to realize torque transmission. Without changing the material of the second driving shaft 32 and the second driven shaft 42, compared with single-point force to realize torque transmission, the second driving shaft 32 and the second driven shaft 42 can transmit greater torque.

[0075] The first driving block a3111 and the second driving block a3112 are directly fixedly connected, which can improve the rigidity and strength of the first driving block a3111 and the second driving block a3112, reduce the deformation of the first driving block a3111 and the second driving block a3112 when they are stressed, improve the ability of the second driving block a3112 to push the first roller 91 from the locking position to the non-locking position, prolong the service life of the first driving block a3111 and the second driving block a3112, and further improve the torque transmission capacity between the first driving shaft 31 and the first driven shaft 41.

[0076] The first driving block b and the second driving block b are directly fixedly connected, which can improve the rigidity and strength of the first driving block b and the second driving block b, reduce the deformation of the first driving block b and the second driving block b when they are stressed, improve the ability of the second driving block b to push the second roller 92 from the locking position to the non-locking position, prolong the service life of the first driving block b and the second driving block b, and further improve the torque transmission capacity between the second driving shaft 32 and the second driven shaft 42.

[0077] The second shifting block a3112 is a fan ring-shaped shifting block with the middle axis collinear with the axis of the first driving shaft 31, and the outer diameter circular surface of the fan ring-shaped shifting block is coplanar with the outer circumferential surface of the output end of the first driving shaft 31. Through such a setting, the first shifting block a3111 and the second shifting block a3112 are farther away from the axis of the first driving shaft 31, so that in the state that the first shifting block a3111 pushes the first columnar block 411, the force arm of the acting force of the first shifting block a3111 is longer, and in the case that the acting force is unchanged, the transmitted torque is larger. Therefore, without changing the material and diameter of the first driving shaft 31 and the first driven shaft 41, the maximum torque that the first driving shaft 31 and the first driven shaft 41 can transmit is larger, thereby improving the ability to transmit torque.

[0078] The second shifting block b is a fan ring-shaped shifting block with the middle axis collinear with the axis of the second driving shaft 32, and the outer diameter circular surface of the fan ring-shaped shifting block is coplanar with the outer circumferential surface of the output end of the second driving shaft 32. Through such a setting, the first shifting block b and the second shifting block b are farther away from the axis of the second driving shaft 32, so that in the state that the first shifting block b pushes the second columnar block 421, the force arm of the acting force of the first shifting block b is longer, and in the case that the acting force is unchanged, the transmitted torque is larger. Therefore, without changing the material and diameter of the second driving shaft 32 and the second driven shaft 42, the maximum torque that the first driving shaft 31 and the first driven shaft 41 can transmit is larger, thereby improving the ability to transmit torque.

[0079] The first shifting block a3111 is a fan ring-shaped shifting block with the middle axis collinear with the axis of the first driving shaft 31, and the first columnar block 411 along the circumference of the first driven shaft 41 has a first side plane 4113 located on both sides of the first limiting surface 4111, and the first side plane 4113 extends along the radial direction of the first driven shaft 41. Through such a setting, when the first shifting block a3111 rotates to contact the first columnar block 411 along with the first driving shaft 31, the side plane of the first shifting block a3111 just fits the corresponding first side plane 4113 of the first columnar block 411, and since the first side plane 4113 extends along the radial direction of the first driven shaft 41, the acting force between the side plane of the first shifting block a3111 and the corresponding first side plane 4113 of the first columnar block 411 is just perpendicular to the radial direction of the first driven shaft 41, and the acting force between the side plane of the first shifting block a3111 and the corresponding first side plane 4113 of the first columnar block 411 is perpendicular to the force arm of the acting force, thereby making the first driving shaft 31 and the first driven shaft 41 more effectively transmit torque.

[0080] The first shifting block b is a sector ring-shaped shifting block with the middle axis collinear with the axis of the second driving shaft 32, and the second columnar block 421 along the circumference of the second driven shaft 42 has second side planes on both sides of the second limiting surface, and the second side planes extend along the radial direction of the second driven shaft 42. Through such a setting, when the first shifting block b rotates to contact the second columnar block 421 along with the second driving shaft 32, the side plane of the first shifting block b just fits the corresponding second side plane of the second columnar block 421, and since the second side plane extends along the radial direction of the second driven shaft 42, the force between the side plane of the first shifting block b and the corresponding second side plane of the second columnar block 421 is just perpendicular to the radial direction of the second driven shaft 42, and the force between the side plane of the first shifting block b and the corresponding second side plane of the second columnar block 421 is perpendicular to the force arm of the force, so that the torque is more effectively transmitted between the second driving shaft 32 and the second driven shaft 42.

[0081] The end surface of the output end of the first driving shaft 31 extends towards the input end of the first driven shaft 41 with a first supporting shaft 312, the outer wall of the first supporting shaft 312 is a cylindrical surface coaxial with the first driving shaft 31, and the first columnar block 411 has a side surface opposite to and parallel to the axis of the first driven shaft 41, and the side surface is in sliding fit with the cylindrical surface of the first supporting shaft 312. Through such a setting, the first supporting shaft 312 can provide support to the first columnar block 411, and when the torque is transmitted between the first driving shaft 31 and the first driven shaft 41, the risk of deformation of the first columnar block 411 due to large force offsetting along the axis of the first driven shaft 41 is reduced, and the stability and reliability of the torque transmission between the first driving shaft 31 and the first driven shaft 41 are improved. In addition, this can also more effectively ensure the coaxiality of the first driving shaft 31 and the first driven shaft 41, and ensure the smoothness of the torque transmission between the first driving shaft 31 and the first driven shaft 41.

[0082] The end surface of the output end of the second driving shaft 32 extends towards the input end of the second driven shaft 42 with a second supporting shaft, the outer wall of the second supporting shaft is a cylindrical surface coaxial with the second driving shaft 32, and the second columnar block 421 has a side surface opposite to and parallel to the axis of the second driven shaft 42, and the side surface is in sliding fit with the cylindrical surface of the second supporting shaft. Through such a setting, the second supporting shaft can provide support to the second columnar block 421, and when the torque is transmitted between the second driving shaft 32 and the second driven shaft 42, the risk of deformation of the second columnar block 421 due to large force offsetting along the axis of the second driven shaft 42 is reduced, and the stability and reliability of the torque transmission between the second driving shaft 32 and the second driven shaft 42 are improved. In addition, this can also more effectively ensure the coaxiality of the second driving shaft 32 and the second driven shaft 42, and ensure the smoothness of the torque transmission between the second driving shaft 32 and the second driven shaft 42.

[0083] The first roller 91 and the second roller 92 serve as the first movable member and the second movable member, respectively, enabling the second lever a3112 and the second lever b to more easily drive the first movable member and the second movable member to move from the locked position to the unlocked position.

[0084] The reducer includes a first drive motor 71 and a second drive motor 72. The first drive motor 71 and the second drive motor 72 drive the intermediate shaft 5 to rotate through the first reduction gear set 61 and the second reduction gear set 62, respectively. The intermediate shaft 5 is synchronously connected to the first drive shaft 31 and the second drive shaft 32. The first drive shaft 31 and the second drive shaft 32 are both located inside the cavity 11. The input ends of the first driven shaft 41 and the second driven shaft 42 pass through both ends of the cavity 11 and are respectively driven and connected to the output ends of the first drive shaft 31 and the second drive shaft 32. When the reducer is used to drive the main shaft of the photovoltaic bracket, the first driven shaft 41 and the second driven shaft 42 of the reducer are connected in series on the main shaft of the photovoltaic bracket. The rotation of the intermediate shaft 5 is driven by the first drive motor 71 and the second drive motor 72 through the first reduction gear set 61 and the second reduction gear set 62, respectively. This, in turn, causes the first drive shaft 31 and the second drive shaft 32 to drive the first driven shaft 41 and the second driven shaft 42 to rotate, thereby driving the rotation of the main shaft of the photovoltaic bracket through the first driven shaft 41 and the second driven shaft 42. This increases the output torque of the reducer and improves its driving capability.

[0085] Preferably, the side of the second paddle block a3112 that contacts the first roller 91 is an arc surface with the same curvature as the outer circumferential surface of the first roller 91, and the side of the second paddle block b that contacts the second roller 92 is an arc surface with the same curvature as the outer circumferential surface of the second roller 92. In this way, without changing the thrust, the pressure on the contact surface between the second paddle block a3112 and the first roller 91 and the contact surface between the second paddle block b and the second roller 92 can be reduced, thereby extending the service life of the second paddle block a3112, the first roller 91, the second paddle block b, and the second roller 92.

[0086] It should be noted that the method of directly fixing the first lever a3111 and the second lever a3112 by integral molding, and the method of directly fixing the first lever b and the second lever b by integral molding, is only a preferred configuration. In practical applications, adjustments can be made. For example, the first lever a3111 and the second lever a3112 can be in contact with each other and fixedly connected by welding or fasteners, and the first lever b and the second lever b can be in contact with each other and fixedly connected by welding or fasteners. The first support shaft 312 and the first lever a3111 are integrally formed, and the second support shaft and the first lever b are integrally formed. This is only a preferred arrangement. In actual applications, adjustments can be made. For example, in one specific arrangement, the first support shaft 312 and the first lever a3111 are in contact with each other and are welded and fixedly connected or fixedly connected by fasteners, and the second support shaft and the first lever b are in contact with each other and are welded and fixedly connected or fixedly connected by fasteners. In another specific arrangement, the first support shaft 312 and the first lever a3111 are separated from each other (i.e., they are not directly fixedly connected), and the second support shaft and the first lever b are separated from each other (i.e., they are not directly fixedly connected). Furthermore, the first side of the first columnar block 411, which faces the axis of the first driven shaft 41 and is parallel to the axis of the first driven shaft 41, is a first arc surface 4112 that contacts the cylindrical surface of the first support shaft 312. The first arc surface 4112 slides in engagement with the cylindrical surface of the first support shaft 312. Similarly, the second side of the second columnar block 421, which faces the axis of the second driven shaft 42 and is parallel to the axis of the second driven shaft 42, is a second arc surface that contacts the cylindrical surface of the second support shaft. The second arc surface slides in engagement with the cylindrical surface of the second support shaft. This is only one specific configuration; in practice... In practical applications, adjustments can be made. For example, in one specific configuration, the first side of the first columnar block 411, facing the axis of the first driven shaft 41 and parallel to the axis of the first driven shaft 41, is a first arc surface that contacts the cylindrical surface of the first support shaft 312. The first arc surface slides in engagement with the cylindrical surface of the first support shaft 312. Similarly, the second side of the second columnar block 421, facing the axis of the second driven shaft 42 and parallel to the axis of the second driven shaft 42, is a second arc surface that contacts the cylindrical surface of the second support shaft. The second arc surface slides in engagement with the cylindrical surface of the second support shaft. Alternatively, having a first support shaft 312 and a second support shaft, with the first arc surface 4112 sliding in engagement with the cylindrical surface of the first support shaft 312 and the second arc surface sliding in engagement with the cylindrical surface of the second support shaft, is only a preferred configuration. In practical applications, adjustments can be made, such as omitting the first support shaft 312 and / or the second support shaft.Four first actuating blocks 311 are evenly distributed around the axis of the first driving shaft 31, four first columnar blocks 411 are evenly distributed around the axis of the first driven shaft 41, four second actuating blocks are evenly distributed around the axis of the second driving shaft 32, and four second columnar blocks 421 are evenly distributed around the axis of the second driven shaft 42. This is also a preferred arrangement. In practical applications, it can be adjusted, such as the four first actuating blocks 311 being non-uniformly distributed around the axis of the first driving shaft 31, the four first columnar blocks 411 being evenly distributed around the axis of the first driven shaft 41, the four second actuating blocks being non-uniformly distributed around the axis of the second driving shaft 32, and the four second columnar blocks 421 being non-uniformly distributed around the axis of the second driven shaft 42.

[0087] It should also be noted that the second lever a3112 is a fan-shaped annular lever whose intermediate axis is collinear with the axis of the first drive shaft 31, and the outer diameter arc surface of this fan-shaped annular lever is coplanar with the outer peripheral surface of the output end of the first drive shaft 31. The second lever b is a fan-shaped annular lever whose intermediate axis is collinear with the axis of the second drive shaft 32, and the outer diameter arc surface of this fan-shaped annular lever is coplanar with the outer peripheral surface of the output end of the second drive shaft 32. This is only a preferred configuration; adjustments can be made in practical applications. For example, in one specific configuration, the second lever a3112 is a fan-shaped annular lever whose intermediate axis is collinear with the axis of the first drive shaft 31. The radius of curvature of the outer diameter arc surface of the fan-shaped annular paddle is smaller than the radius of curvature of the outer circumferential surface of the output end of the first drive shaft 31. The second paddle b is a fan-shaped annular paddle whose central axis is collinear with the axis of the second drive shaft 32. The radius of curvature of the outer diameter arc surface of the fan-shaped annular paddle is smaller than the radius of curvature of the outer circumferential surface of the output end of the second drive shaft 32. In another specific configuration, the second paddle a3112 is a paddle with a cross-section perpendicular to the axis of the first drive shaft 31, which is rectangular, trapezoidal, or other shaped. The second paddle b is a paddle with a cross-section perpendicular to the axis of the second drive shaft 32, which is rectangular, trapezoidal, or other shaped. In addition, the first lever a3111 is a fan-shaped annular lever whose central axis is collinear with the axis of the first drive shaft 31, and whose first side plane 4113 extends radially along the first driven shaft 41. The first lever b is a fan-shaped annular lever whose central axis is collinear with the axis of the second drive shaft 32, and whose second side plane extends radially along the second driven shaft 42. This is also a preferred configuration. In practical applications, it can be adjusted. For example, the first lever a3111 is a fan-shaped annular lever whose central axis is collinear with the axis of the first drive shaft 31, and whose first side plane 4113 does not extend radially along the first driven shaft 41. The first lever b is a fan-shaped annular lever whose central axis is collinear with the axis of the second drive shaft 32, and whose second side plane does not extend radially along the second driven shaft 42. Furthermore, the first roller 91 and the second roller 92 serve as the first movable member and the second movable member, respectively. This is also a preferred configuration. In practical applications, adjustments can be made. For example, in one specific configuration, the first movable member and the second movable member can be the first ball and the second ball, respectively. In another specific configuration, the first limiting surface 4111 and the second limiting surface are both V-shaped surfaces, that is, the first limiting surface 4111 and the second limiting surface are both composed of two planes. The first movable member and the second movable member are both irregularly shaped parts with a plane and an arc surface. The plane of the first movable member slides in contact with a partial plane of the first limiting surface 4111. The switching between the locked position and the unlocked position is achieved by the first movable member sliding on the partial plane of the first limiting surface 4111. The plane of the second movable member contacts a partial plane of the second limiting surface. The switching between the locked position and the unlocked position is achieved by the second movable member sliding on the partial plane of the second limiting surface.The first V-shaped spring 81 and the second V-shaped spring 82 serve as the first elastic element and the second elastic element, which is only a specific arrangement. In actual applications, they can be adjusted. For example, the first elastic element and the second elastic element can be the first elastic block and the second elastic block, respectively. The first elastic block and the second elastic block can be made of rubber, silicone, or other suitable materials.

[0088] In some other feasible embodiments, unlike the embodiments described above, the reducer includes a drive shaft and a driven shaft, a set of reduction gears, and a drive motor. Specifically, it includes a first drive shaft 31 and a first driven shaft 41, or a second drive shaft 32 and a second driven shaft 42. The reduction gear set can be a combination of a large gear and a small gear. The output shaft of the drive motor is driven by the large gear of the reduction gear set, and the small gear of the reduction gear set is driven by the drive shaft; alternatively, the output shaft of the drive motor is driven by the drive shaft, the driven shaft is driven by the large gear of the reduction gear set, and the shaft of the small gear of the reduction gear set serves as the output shaft of the reducer. Of course, the reducer may also not include a drive motor and instead be driven by an independent motor during use.

[0089] In other feasible embodiments, the present invention also provides a transmission mechanism, which includes the base 1, the first drive shaft 31, and the first driven shaft 41, as well as the connection structure between the first drive shaft 31 and the first driven shaft 41, as described in the above embodiments. The input end of the first drive shaft 31 extends out from the other end of the cavity 11. The base 1 can be fixed to the installation site by means of the first leg 211 on the first end cover 21 and the second leg 221 on the second end cover 22, or by other conventional structures, which will not be elaborated here.

[0090] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A transmission mechanism, characterized in that, The transmission mechanism includes: The base has a cylindrical cavity; A drive shaft, which is coaxial with the cavity and whose output end is inserted into the cavity, has a plurality of actuating blocks distributed around its axis on the end face of the output end. Each actuating block includes a first actuating block and a second actuating block that are directly fixedly connected and distributed radially outward along the end face. A driven shaft, coaxial with the cavity, has its input end inserted into the cavity. The end face of the input end has columnar blocks distributed around its axis, corresponding to each other and inserted between adjacent actuating blocks. Each columnar block has a limiting surface facing away from the axis of the driven shaft. Along the circumference of the driven shaft, each limiting surface has two locking positions, a non-locking position between the locking positions, an elastic element located in the non-locking position, and movable elements located on both sides of the elastic element that can only move between the locking and non-locking positions. The elastic element is used to position the movable element in the locking position when the driving shaft is stationary, so that the driven shaft reaches a locked state when it has a rotational tendency. The columnar block and the locking position are respectively located on the moving paths of the first and second toggle blocks. The toggle block is configured to first push the movable part to move away from the locking position through the second toggle block during the rotation of the drive shaft, and then push the columnar block to rotate around the axis of the driven shaft through the first toggle block.

2. The transmission mechanism according to claim 1, characterized in that, The first and second levers are integrally formed.

3. The transmission mechanism according to claim 1, characterized in that, The second paddle is a fan-shaped annular paddle with its central axis collinear with the axis of the drive shaft, and the outer diameter arc surface of the fan-shaped annular paddle is coplanar with the outer peripheral surface of the output end of the drive shaft.

4. The transmission mechanism according to claim 3, characterized in that, The first lever is a fan-shaped annular lever with its central axis collinear with the axis of the drive shaft. The columnar block has side planes located on both sides of the limiting surface along the circumference of the driven shaft, and the side planes extend radially along the driven shaft.

5. The transmission mechanism according to claim 1, characterized in that, A support shaft extends from the end face of the output end toward the input end. The outer wall of the support shaft is a cylindrical surface coaxial with the drive shaft. The columnar block has a side surface that faces the axis of the driven shaft and is parallel to the axis of the driven shaft. The side surface slides in conjunction with the cylindrical surface.

6. The transmission mechanism according to claim 5, characterized in that, The side surface is an arc surface that contacts the cylindrical surface line, or the side surface is an arc surface that contacts the cylindrical surface.

7. The transmission mechanism according to claim 5, characterized in that, The first lever is directly fixedly connected to the support shaft or integrally formed.

8. The transmission mechanism according to any one of claims 1 to 7, characterized in that, The movable component is a cylindrical component; and / or the elastic component is a V-shaped spring.

9. A speed reducer, characterized in that, The speed reducer includes a speed reduction gear set and a transmission mechanism as described in any one of claims 1 to 8; The output end of the reduction gear set is driven to be connected to the input end of the drive shaft, or the input end of the reduction gear set is driven to be connected to the output end of the driven shaft.

10. The speed reducer according to claim 9, characterized in that, The transmission mechanism includes two drive shafts and two driven shafts. The two drive shafts are located inside the base and between the two driven shafts. The two drive shafts are synchronously connected through an intermediate shaft. The reduction gear set includes a first reduction gear set and a second reduction gear set. The first reduction gear set includes a first driving bevel gear and a first driven bevel gear that mesh with each other. The second reduction gear set includes a second driving bevel gear and a second driven bevel gear that mesh with each other. The first driven bevel gear and the second driven bevel gear are both mounted on the intermediate shaft and are coaxial with the intermediate shaft. The reducer also includes a first drive motor and a second drive motor. The output shafts of the first drive motor and the second drive motor both pass through the side wall of the base and are coaxially and fixedly connected to the first drive bevel gear and the second drive bevel gear, respectively.

Images