Transmission device and feeder including the transmission device

Abstract

The present invention relates to the technical field of variable speed transmission, and more specifically, to a transmission device and a feeder including the transmission device, comprising a housing and a driving shaft and a driven shaft arranged in parallel, wherein the driving shaft and the driven shaft are both rotatably connected in the housing, the driving shaft is coaxially sleeved with a plurality of driving gears, and the driven shaft is sleeved with a plurality of driven gears, the driving gears and the driven gears are one-to-one corresponding to each other and the corresponding driving gears and the driven gears are meshed; the transmission device also includes a clutch sleeve and a shifting mechanism, wherein the clutch sleeve is sleeved on the outer periphery of the driven shaft so as to be axially slidable but non-rotatable relative to the driven shaft. Transmission grooves are arranged on both end surfaces of the clutch sleeve, and a transmission member is arranged on the end surface of the driven gear. The shifting mechanism is connected to the clutch sleeve and is used to drive the clutch sleeve to move axially along the driven shaft. The present invention can realize speed change without disassembling any parts, and the shifting mechanism is directly connected to the clutch sleeve without connecting a shift fork, so the structure is simple and the manufacturing cost is lower.

Description

Technical Field

[0001] The present invention relates to the technical field of variable speed transmission, and more particularly to a transmission device and a feeder comprising the transmission device. Background Art

[0002] At present, when the feeder changes speed, under the factory-set gear ratio, there are only two speeds, fast and slow. If you want to get a speed other than the factory-set gear ratio, you need to remove the rear cover screws, rear cover, gear locking nuts, gaskets, gears, flat keys and other parts, replace the gears with the new gear ratio, and then reinstall the above parts to get the new speed. If the speed obtained by replacing the new gear ratio does not meet the actual production needs, you need to repeat the above disassembly and assembly steps, which is time-consuming and laborious. Frequent disassembly and assembly of the feeder will not only increase the maintenance cost and affect the life of the feeder parts, but also a large amount of lubricating grease at the meshing position during the disassembly process is easy to leak and pollute the working environment; in addition, the disassembly and assembly of the feeder requires professional technical requirements, and the disassembly and assembly operation is cumbersome. If the disassembly and assembly operation is improper, it will leave safety hazards.

[0003] Chinese patent CN112081880A and Chinese patent CN112081881A both disclose a transmission structure. When shifting gears, the shift shaft is driven to rotate 180 degrees by the shift knob. The rotation of the boss drives the long groove of the shift fork to slide along the support member. The shift fork therefore slides along the support member. The support member is parallel to the input shaft. The shift fork can drive the sliding guide sleeve to slide axially. The key of the sliding guide sleeve slides to the axial position corresponding to the gear set with different tooth ratios, thereby realizing speed shifting. The above schemes all use the rotation of the boss on the shift shaft to drive the shift fork to slide, and then the shift fork drives the sliding guide sleeve to slide axially. However, the above schemes have the following technical problems: (1) The shift fork is not a standard part, and the shift fork needs to be used in conjunction with a guide mechanism. It requires many parts and has high requirements for the coordination between the parts, resulting in high costs and reduced working reliability; (2) When the multi-speed shift fork shift scheme is used for two-speed shift, if the number of gears is directly reduced and the shift fork shift scheme is continued, and the shift fork is used to shift the guide sleeve to achieve shifting, although the design and development cost is reduced, the problem pointed out in point (1) still exists; if the shift fork is used to directly shift the gear, although the number of parts is reduced, at high speeds, problems such as tooth clashing and failure to engage the gear will occur, and it is difficult to balance cost and working reliability; (3) When turning the shift knob to shift gears, it cannot be guaranteed to rotate to the correct gear position. Rotating a few more angles or a few less angles will easily result in a neutral position.

[0004] In addition, Chinese patent CN203754045U discloses an improved structure of the feeding wheel transmission of a material feeder, which drives the driving pinion through the worm gear shaft and then drives the driving gear, so as to drive the driving shaft of the gear transmission group to drive the driving gear, two pinions and two driven gears to rotate in sequence, and the driven gear synchronously drives the gear transmission chain to rotate to drive the first and second conveying wheel groups to operate. The above scheme is transmitted through a five-gear and five-axis structure of a driving pinion, a driving gear, a driving gear, a pinion, and a driven gear. The number of gears required is large, and two transition shafts need to be set. The meshing relationship between the gears is complicated, resulting in high manufacturing and installation costs. In addition, if the installation accuracy is not enough, it will affect the working stability of the feeder. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a transmission device and a feeder including the transmission device. The shifting mechanism directly acts on the clutch sleeve so that the clutch sleeve slides axially to the axial position corresponding to the driven gear with different tooth ratios. The clutch sleeve and the driven gear are arranged in coordination through transmission grooves and transmission parts to achieve smooth speed shifting, simple structure, easy manufacturing, and save manufacturing costs.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A transmission device is provided, comprising a housing, a driven shaft rotatably connected in the housing, and a plurality of driven gears sleeved on the driven shaft; the transmission device also comprises a clutch sleeve and a shift mechanism, wherein the clutch sleeve is sleeved on the outer periphery of the driven shaft so as to be axially slidable but non-rotatable relative to the driven shaft. Transmission grooves are arranged on both end surfaces of the clutch sleeve, and a transmission member is arranged on the end surface of the driven gear. The shift mechanism is connected to the clutch sleeve and is used to drive the clutch sleeve to move axially along the driven shaft, and the clutch sleeve is connected to the driven gear when the transmission groove is inserted into the transmission member.

[0008] The transmission device of the present invention has a shift mechanism that is directly connected to the clutch sleeve without connecting the shift fork, so that the clutch sleeve slides axially to the axial position corresponding to the driven gear of different gear ratios, and the transmission groove is nested with the transmission member to achieve shifting. The structure is simple, easy to manufacture, and saves manufacturing costs. The speed change can be achieved without disassembling any parts, which can shorten the machine adjustment time, improve production efficiency, reduce the use time and cost of consumables, reduce the safety risks caused by disassembly, reduce the requirements for the user's professional skills, and extend the service life of the equipment; the driving mechanism provides power for the rotation of the driving shaft, and the rotation of the driving shaft drives the driving gear located on the driving shaft to rotate together and then drives the driven gear nested with the clutch sleeve to rotate, thereby driving the driven shaft to rotate to output power and achieve speed change. The transmission device of the present invention has a simple structure, reliable performance, and can reduce manufacturing costs.

[0009] Furthermore, an annular groove is provided on the outer peripheral surface of the clutch sleeve, and the shifting mechanism includes a shift shaft and a protrusion located at the end of the shift shaft, the axis of the shift shaft is perpendicular to the axis of the driven shaft, the protrusion is eccentrically arranged at one end of the shift shaft relative to the axis of the shift shaft, and the protrusion is inserted into the annular groove.

[0010] Furthermore, the other end of the shift shaft is provided with a cam step with crests and troughs formed by changing the radial distance relative to the axis of the shift shaft, and the shift shaft sleeve is provided with a sleeve end cover, and the sleeve end cover is located at the outer periphery of the cam step; the sleeve end cover is provided with a through hole, and a spring-ball structure including a ball and a spring is built into the through hole, one end of the spring abuts against the housing, and the other end of the spring abuts against the ball, and the ball abuts against the outer peripheral surface of the cam step; when the gear shift is completed, the ball abuts against the trough of the cam step.

[0011] Furthermore, the spring ball structure is divided into two groups, and the two groups of spring ball structures are symmetrical on both sides of the central axis of the cam step.

[0012] Furthermore, a limit block is provided on the outer periphery of the driven shaft, a limit groove is provided at the inner hole of the clutch sleeve, and the limit block is slidably connected to the limit groove.

[0013] Furthermore, the limit block is an external spline step arranged on the outer periphery of the driven shaft, the limit groove is a spline inner hole arranged at the inner hole of the clutch sleeve, and the external spline step is slidably connected to the spline inner hole.

[0014] Furthermore, a plurality of equally spaced first bosses are provided at both ends of the clutch sleeve, the transmission groove is located between adjacent first bosses, and the transmission member is a second boss equally spaced from the driven gear facing the end surface of the clutch sleeve.

[0015] Furthermore, the span angle occupied by the first boss is smaller than the span angle occupied by the interval between adjacent first bosses, and the span angle occupied by the second boss is smaller than the span angle occupied by the interval between adjacent second bosses.

[0016] Furthermore, it also includes a driving shaft rotatably connected to the shell, the driving shaft and the driven shaft are arranged in parallel, the driving shaft is connected to a driving mechanism that drives the driving shaft to rotate, the driving shaft is coaxially sleeved with a plurality of driving gears fixed relative to the driving shaft, the driven gear can rotate relative to the driven shaft but is sleeved on the driven shaft with limited axial movement, the driving gears and the driven gears correspond to each other one by one and the corresponding driving gears and driven gears are meshed.

[0017] Further, the driving gear includes a first driving gear and a second driving gear, the driven gear includes a first driven gear and a second driven gear, the first driving gear is meshed with the first driven gear, the second driving gear is meshed with the second driven gear, and the clutch sleeve is located between the first driven gear and the second driven gear.

[0018] Furthermore, the driving mechanism includes a driving motor, a worm and a worm wheel, the worm is connected to the output end of the driving motor, the worm is meshed with the worm wheel, the worm wheel is coaxially fixedly connected to the driving shaft and the worm wheel is located between the first driving gear and the second driving gear.

[0019] The present invention further provides a feeder, comprising a power distribution mechanism and the transmission device as described above, wherein the input member of the power distribution mechanism is connected to the output end of the driven shaft.

[0020] Furthermore, the power distribution mechanism includes a transition shaft balanced on the driven shaft, supported on the housing through bearings and freely rotatable relative to the housing, two first drive shafts balanced on the transition shafts, supported on the housing through bearings and freely rotatable relative to the housing, and two second drive shafts balanced on the first drive shafts and supported on the housing through bearings and freely rotatable relative to the housing. A driving sprocket is fixedly sleeved on the protruding part of the driven shaft from the housing, a driven sprocket is fixedly sleeved on the transition shaft, the driving sprocket and the driven sprocket are connected and meshed by a chain, a transition gear is sleeved on the inner side of the driven sprocket on the transition shaft, two passive gears are fixedly sleeved on the two first drive shafts, and the transition gear meshes with the two passive gears at the same time; a first sprocket is provided on the end of the two first drive shafts, and a second sprocket is provided on the end of the two second drive shafts, the first sprocket and the second sprocket have the same number of teeth, and power is transmitted through the meshing of the first chain and the second chain respectively.

[0021] The feeder of the present invention adopts the above-mentioned transmission device, which can achieve smooth speed change without disassembling any parts, shorten the machine adjustment time, improve production efficiency, reduce the use time and cost of consumables, reduce the safety risks caused by disassembly, reduce the requirements for users' professional skills, and extend the service life of the equipment; and has a simple structure, reliable performance, and can reduce manufacturing costs. In addition, the number of transmission gears required for the power distribution mechanism of the feeder of the present invention is reduced, and the structure is simplified, thereby reducing the manufacturing cost of the product.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The transmission device of the present invention and the feeder including the transmission device can achieve speed change without disassembling any parts, which can shorten the machine adjustment time, improve production efficiency, reduce the use time and cost of consumables, reduce the safety risks caused by disassembly, reduce the requirements for users' professional skills, and extend the service life of the equipment; the shift mechanism is directly connected to the clutch sleeve without the need to connect the shift fork, has a simple structure, lower manufacturing cost, and better economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded schematic diagram of a transmission device;

[0025] Figure 2 It is a partial structural schematic diagram of a transmission device;

[0026] Figure 3 It is a schematic diagram of the principle of gear shifting of the transmission device;

[0027] Figure 4 It is a schematic diagram of the structure of the shift shaft of the transmission device;

[0028] Figure 5 A schematic structural diagram of the shift shaft of the transmission device from another perspective;

[0029] Figure 6 This is an exploded diagram of the feeder;

[0030] Figure 7 It is a structural schematic diagram of the feeder;

[0031] Figure 8 It is a structural schematic diagram of the feeder from another perspective;

[0032] In the accompanying drawings: 100, transmission device; 110, housing; 111, box body; 112, box cover; 120, driving shaft; 121, middle step; 122, first step; 123, second step; 124, first bearing; 125, second bearing; 130, driven shaft; 131, external spline step; 132, third step; 133, fourth step; 134, third bearing; 135, fourth bearing; 136, driving sprocket; 140, driving mechanism; 141, driving motor; 142, worm; 143, worm wheel; 150, driven gear; 151, transmission member; 152, first driven gear; 153, second driven gear; 160, driving gear; 161, first driving gear; 162, second driving gear; 170, clutch sleeve; 171, transmission groove; 172, spline inner hole; 173, first boss; 174, ring groove; 180, shift mechanism; 181, shift shaft; 182, protrusion; 183, knob; 184, cam step; 185, sleeve end cover; 186, through hole; 187, spring; 189, ball; 200, power distribution mechanism; 210, transition shaft; 211, driven sprocket; 220, first driving shaft; 221, driven gear; 222, first sprocket; 230, second driving shaft; 231, second sprocket; 240, spacer; 250, transition gear; 260, roller chain; 270, first roller chain; 280, second roller chain. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] like Figures 1 to 5 The figure shows an embodiment of a transmission device 100 of the present invention, comprising a housing 110 and a driving shaft 120 and a driven shaft 130 arranged in parallel. The driving shaft 120 and the driven shaft 130 are both rotatably connected in the housing 110 through bearings. The driving shaft 120 is connected to a driving mechanism 140 for driving the driving shaft 120 to rotate. The driving shaft 120 is coaxially sleeved with a plurality of driving gears 160 fixed relative to the driving shaft 120. The driven shaft 130 is sleeved with a plurality of driven gears 150 rotatable relative to the driven shaft 130 but limited in axial movement. The driving gears 160 and the driven gears 150 correspond to each other one by one and the corresponding driving gears 160 and the driven gears 150 are meshed. The transmission device 100 also includes a clutch sleeve 170 and a shift mechanism 180. The clutch sleeve 170 is sleeved on the outer periphery of the driven shaft 130 so as to be axially slidable relative to the driven shaft 130 but not rotatable. Transmission grooves 171 are provided on both end surfaces of the clutch sleeve 170, and transmission parts 151 are provided on the end surfaces of the driven gear 150. The shifting mechanism 180 is connected to the clutch sleeve 170 and is used to drive the clutch sleeve 170 to move axially along the driven shaft 130. When the clutch sleeve 170 moves axially to the transmission groove 171 and is nested in the transmission part 151, it is connected to the driven gear 150.

[0037] When this embodiment is implemented, the shift mechanism 180 is directly connected to the clutch sleeve 170 without connecting the shift fork, so that the clutch sleeve 170 slides axially to the axial position corresponding to the driven gear 150 with different gear ratios, and the transmission groove 171 is nested with the transmission member 151 to achieve gear shifting; after the gear shifting is completed, the driving mechanism 140 provides power for the rotation of the driving shaft 120, and the rotation of the driving shaft 120 drives the driving gear 160 located on the driving shaft 120 to rotate together, thereby driving the driven gear 150 nested with the clutch sleeve 170 to rotate, thereby driving the driven shaft 130 to rotate and output power to achieve speed change. The shift mechanism 180 and the clutch sleeve 170 of this embodiment can be applied to two-speed shifting or even multi-speed shifting. The positions and numbers of the driving gear 160, the driven gear 150, and the clutch sleeve 170 are set accordingly to achieve two-speed shifting or multi-speed shifting.

[0038] The outer circumferential surface of the clutch sleeve 170 is provided with an annular groove 174. The shift mechanism 180 includes a shift shaft 181 and a cylindrical protrusion 182 on the shift shaft 181. The axis of the shift shaft 181 is perpendicular to the axis of the driven shaft 130. The protrusion 182 is eccentrically arranged at one end of the shift shaft 181 relative to the axis of the shift shaft 181, and the protrusion 182 is inserted into the annular groove 174, but does not affect the rotation of the clutch sleeve 170. Figure 3 , Figure 4 As shown. When the shifting shaft 181 rotates a certain angle, the protrusion 182 drives the clutch sleeve 170 to move a certain distance along the axial direction of the driven shaft 130, so that the clutch sleeve 170 and the driven gear 150 are engaged or disengaged: when the clutch sleeve 170 and the driven gear 150 are engaged, the driven shaft 130 will also rotate together during the process of the driven gear 150 meshing and rotating with the driving gear 160; when the clutch sleeve 170 and the driven gear 150 are disengaged, the driven shaft 130 will not rotate together during the process of the driven gear 150 meshing and rotating with the driving gear 160. Among them, the protrusion 182 is set as a small protruding cylinder to improve the stability of the protrusion 182 sliding in the annular groove 174, and the other end of the shifting shaft 181 is connected to a knob 183 to facilitate the shifting operation. In addition, it should be noted that the use of rotating the shift shaft 181 to achieve gear shifting is a preferred method for convenient operation and is not a restrictive provision of the present invention. Other gear shifting mechanisms 180 that can linearly push the clutch sleeve 170 to slide are also applicable to the present invention.

[0039] The other end of the shifting shaft 181 is provided with a cam step 184 with a radial distance change relative to the axis of the shifting shaft 181 to form a wave crest and a wave trough. The shifting shaft 181 is sleeved with a sleeve end cover 185, and the sleeve end cover 185 is located on the outer periphery of the cam step 184; the sleeve end cover 185 is provided with a through hole 186, and the through hole 186 has a spring ball structure including a ball 189 and a spring 187 built therein, one end of the spring 187 abuts against the housing 110, and the other end of the spring 187 abuts against the ball 189, and the ball 189 abuts against the outer peripheral surface of the cam step 184, as shown in FIG. Figure 3 , Figure 4 , Figure 5 As shown; when the gear shift is completed, the ball 189 abuts against the trough of the cam step 184. There are two groups of spring ball structures, and the two groups of spring ball structures are symmetrical on both sides of the central axis of the cam step 184. In this embodiment, the peaks and troughs on the cam step 184 are symmetrically distributed. During the rotation of the shifting shaft 181, the ball 189 always presses and abuts against the outer peripheral surface of the cam step 184: when the gear shift is completed, the ball 189 abuts against the trough of the cam step 184; when the gear shift is not in place, the ball 189 abuts against the peak or other waist position of the cam step 184. At this time, under the action of the spring 187, the shifting shaft 181 continues to rotate and reset to the trough of the cam step 184, which can effectively prevent the occurrence of a neutral gear situation. In order to obtain a better reset and shifting effect, the peak of this embodiment can be set at the middle position where the ball 189 abuts against the cam step 184 when there are two shifting positions, such as Figure 5 When two groups of spring ball structures are provided, the sleeve end cover 185 is also radially symmetrically provided with two through holes 186 penetrating the inner hole, and the through holes 186 limit the ball 189 to move only along the axis of the through hole 186; the housing 110 half-wraps the sleeve end cover 185, that is, the sleeve end cover 185 is partially provided inside the housing 110 and partially provided outside the housing 110. In addition, the shifting shaft 181 of this embodiment is sleeved with an O-ring, which is pressed by the corresponding inner hole wall of the housing 110 and the corresponding step surface of the shifting shaft to achieve a sealing effect.

[0040] The outer periphery of the driven shaft is provided with a limit block, and the inner hole of the clutch sleeve is provided with a limit groove. The limit block is slidably connected with the limit groove, so that the clutch sleeve 170 can slide axially but cannot rotate relative to the driven shaft 130. Specifically in this embodiment, the driven shaft 130 is provided with an external spline step 131, and the clutch sleeve 170 is provided with a spline inner hole 172. The external spline step 131 serves as a limit block, and the spline inner hole 172 serves as a limit groove. The external spline step 131 is slidably connected with the spline inner hole 172, and the clutch sleeve 170 can move axially relative to the driven shaft 130, but the clutch sleeve 170 cannot rotate relative to the driven shaft 130. Figure 1Of course, the sliding connection between the outer spline step 131 and the spline inner hole 172 is not the only form of connection between the clutch sleeve 170 and the driven shaft 130 of the present invention, and other limiting structures that can limit the rotation of the clutch sleeve 170 relative to the driven shaft 130 can also be applied to the present invention.

[0041] Both ends of the clutch sleeve 170 are provided with a plurality of equally spaced first bosses 173, the transmission groove 171 is located between adjacent first bosses 173, and the transmission member 151 is a second boss equally spaced on the end surface of the driven gear 150 facing the clutch sleeve 170, such as Figure 1 As shown. When the second boss is embedded in the transmission groove 171, the clutch sleeve 170 and the driven gear 150 are in a mating state, which can limit the relative rotational movement between the driven gear 150 and the driven shaft 130. Among them, the span angle occupied by the first boss 173 is smaller than the span angle occupied by the interval between adjacent first bosses 173, and the span angle of the second boss is smaller than the span angle occupied by the interval between adjacent second bosses. The span angle occupied by all bosses with equal intervals is smaller than the span angle occupied by the interval between adjacent bosses. When the boss is embedded in the interval gap, there is a certain span angle virtual position, which makes it easier for the two to be embedded when they start to mate from the disengaged state when there is a relatively large speed difference.

[0042] Embodiment 2

[0043] The embodiment of the transmission device 100 of the present invention is similar to the embodiment 1, except that the transmission device 100 of the present embodiment performs two-speed conversion. The driving gear 160 includes a first driving gear 161 and a second driving gear 162, and the driven gear 150 includes a first driven gear 152 and a second driven gear 153. The first driving gear 161 is meshed with the first driven gear 152, and the second driving gear 162 is meshed with the second driven gear 153. The clutch sleeve 170 is located between the first driven gear 152 and the second driven gear 153. The driving mechanism 140 includes a driving motor 141, a worm 142 and a worm wheel 143. The worm 142 is connected to the output end of the driving motor 141, the worm 142 is meshed with the worm wheel 143, and the worm wheel 143 is coaxially fixedly connected with the driving shaft 120 and the worm wheel 143 is located between the first driving gear and the second driving gear. In the present embodiment, the housing 110 includes a detachably connected box body 111 and a box cover 112.

[0044] Specifically, the worm wheel 143 is fixedly sleeved at the middle step 121 of the driving shaft 120, and the first step 122 and the second step 123 are arranged on both sides of the middle step 121. The first driving gear 161 and the second driving gear 162 are respectively fixed on the first step 122 and the second step 123. Specifically, the first driving gear 161, the second driving gear 162 and the worm wheel 143 are all fixedly connected and installed with the driving shaft 120 through a flat key. The worm wheel 143 is fixedly connected and installed as a whole relative to the driving shaft 120. The worm wheel 143 meshes with the worm 142. When power is input from the worm 142, the worm wheel 143 and the driving shaft 120 are driven as a whole to rotate around the axis at a certain proportional speed. In addition, the first bearing 124 and the second bearing 125 are also installed at both ends of the driving shaft 120. The first bearing 124 and the second bearing 125 are supported on the box body 111 and the box cover 112 respectively. The driving shaft 120 can rotate relative to the housing 110 but the axial position is fixed. The driven shaft 130 is provided with an external spline step 131, and the external spline step 131 is arranged in the middle part of the driven shaft 130. A third step 132 and a fourth step 133 are arranged on both sides of the external spline step 131. The first driven gear 152 and the second driven gear 153 are respectively installed on the third step 132 and the fourth step 133. The first driven gear 152 and the second driven gear 153 can rotate freely relative to the driven shaft 130 but the axial movement is limited. In addition, a third bearing 134 and a fourth bearing 135 are installed at both ends of the driven shaft 130. The third bearing 134 and the fourth bearing 135 are supported on the box body 111 and the box cover 112 respectively. A sealing ring is installed on the outer side of the fourth bearing 135, which is pressed by the corresponding step surface of the driven shaft and the inner hole surface of the box cover 112 to achieve a sealing effect. The driven shaft 130 is rotatable relative to the housing 110 but the axial position is fixed. When the clutch sleeve 170 cooperates with the first driven gear 152 or the second driven gear 153, the rotation of the first driven gear 152 or the second driven gear 153 will drive the driven shaft 130 to rotate around the axis at a certain ratio of speed, such as Figure 1 shown.

[0045] In this embodiment, the other end of the shifting shaft 181 is provided with a cam step 184 with crests and troughs formed by varying radial distances relative to the axis of the shifting shaft 181. The cam step 184 is provided with four crests and four troughs, and the four crests and four troughs are spaced, evenly, and symmetrically distributed, such as Figure 4 , Figure 5 There are two groups of spring ball structures, and the two groups of spring ball structures are symmetrical on both sides of the central axis of the cam step 184, as shown in FIG. Figure 3As shown. When the clutch sleeve 170 is engaged with the first driven gear 152 and disengaged from the second driven gear 153, the position of the ball 189 is recorded as position A. When the clutch sleeve 170 is disengaged from the first driven gear 152 and engaged with the second driven gear 153, the position of the ball 189 is recorded as position B. The wave crest is at the middle position of the angle between position A and position B, and both position A and position B are located at the wave valley. The ball 189 is pressed by the spring 187 to abut against the shifting shaft cam step 184. When the shifting shaft is rotated, the cam step 184 forces the ball 189 to move radially over the wave crest. When the contact point between the ball 189 and the shifting shaft cam step 184 is not the valley value, the shifting shaft is driven by the force of the spring 187 to rotate in the direction of the nearest wave valley so that the ball 189 falls to a certain wave valley of the cam step 184.

[0046] Embodiment 3

[0047] like Figures 6 to 8 The embodiment of the feeder of the present invention is shown, which includes a power distribution mechanism 200 and a transmission device 100 as in the first or second embodiment, wherein the input member of the power distribution mechanism 200 is connected to the output end of the driven shaft 130. Specifically, the end of the driven shaft 130 protrudes from the housing 110 and is connected to the input of the power distribution mechanism 200. The power distribution mechanism 200 includes a transition shaft 210 that is supported on the housing 110 by a bearing and can rotate freely relative to the housing 110, two first drive shafts 220 that are supported on the housing 110 by a bearing and can rotate freely relative to the housing 110, and two second drive shafts 230 that are supported on the housing 110 by a bearing and can rotate freely relative to the housing 110, which are balanced with the transition shaft 210. A driving sprocket 136 is fixedly sleeved on the end of the reduction gearbox driven shaft 130 protruding from the reduction gearbox, and a driven sprocket 211 is fixedly sleeved on the transition shaft 210. The driving sprocket 136 and the driven sprocket 211 are connected and meshed through a roller chain 260.

[0048] A spacer sleeve 240 is sleeved on the inner side of the driven sprocket 211 on the transition shaft 210, and a transition gear 250 is fixedly sleeved on the inner side of the spacer sleeve 240. Two passive gears 221 are fixedly sleeved on the two first drive shafts 220. The transition gear 250 is meshed with the two passive gears 221 at the same time. When the transition gear 250 rotates, it drives the two passive gears 221 to rotate and distribute the power. A first sprocket 222 is provided at the end of the two first drive shafts 220, and a second sprocket 231 is provided at the end of the two second drive shafts 230. The first sprocket 222 and the second sprocket 231 have the same number of teeth, and the power is transmitted through the meshing of the first roller chain 270 and the second roller chain 280 respectively.

[0049] By adopting the power distribution mechanism 200 of this embodiment, the number of required transmission gears is reduced and the structure is simplified, thereby reducing the manufacturing cost of the product.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transmission device (100), comprising a housing (110), a driven shaft rotatably connected to the housing (110), and a plurality of driven gears (150) sleeved on the driven shaft (130); characterized in that: It also includes a clutch sleeve (170) and a shifting mechanism (180), wherein the clutch sleeve (170) is sleeved on the outer periphery of the driven shaft (130) so as to be axially slidable but non-rotatable with respect to the driven shaft (130), transmission grooves (171) are arranged on both end surfaces of the clutch sleeve (170), and a transmission member (151) is arranged on the end surface of the driven gear (150), the shifting mechanism (180) is connected to the clutch sleeve (170) and is used to drive the clutch sleeve (170) to move axially along the driven shaft (130), and the clutch sleeve (170) is connected to the driven gear (150) when it moves axially to the transmission groove (171) and is nested in the transmission member (151); The outer peripheral surface of the clutch sleeve (170) is provided with an annular groove (174); the shift mechanism (180) comprises a shift shaft (181) and a protrusion (182) located at the end of the shift shaft (181); the axis of the shift shaft (181) is perpendicular to the axis of the driven shaft (130); the protrusion (182) is eccentrically arranged at one end of the shift shaft (181) relative to the axis of the shift shaft (181), and the protrusion (182) is inserted into the annular groove (174); The other end of the shifting shaft (181) is provided with a cam step (184) with crests and troughs formed by varying radial distances relative to the axis of the shifting shaft (181); the shifting shaft (181) is sleeved with a shaft sleeve end cover (185), and the shaft sleeve end cover (185) is located on the outer periphery of the cam step (184); the shaft sleeve end cover (185) is provided with a through hole (186), and a spring ball structure including a ball (189) and a spring (187) is built in the through hole (186); one end of the spring (187) abuts against the housing (110), and the other end of the spring (187) abuts against the ball (189), and the ball (189) abuts against the outer peripheral surface of the cam step (184); when the shifting is completed, the ball (189) abuts against the trough of the cam step (184); A limit block is provided on the outer periphery of the driven shaft (130), a limit groove is provided at the inner hole of the clutch sleeve (170), and the limit block is slidably connected to the limit groove.

2. The transmission device (100) according to claim 1, characterized in that: The spring ball structures are divided into two groups, and the two groups of spring ball structures are symmetrically arranged on both sides of the central axis of the cam step (184).

3. The transmission device (100) according to claim 1, characterized in that: The limit block is an external spline step (131) arranged on the outer periphery of the driven shaft (130), the limit groove is a spline inner hole (172) arranged at the inner hole of the clutch sleeve (170), and the external spline step (131) is slidably connected to the spline inner hole (172).

4. The transmission device (100) according to claim 1, characterized in that: Both ends of the clutch sleeve (170) are provided with a plurality of first bosses (173) spaced equally apart, the transmission groove (171) is located between adjacent first bosses (173), and the transmission member (151) is a second boss spaced equally apart on the end surface of the driven gear (150) facing the clutch sleeve (170).

5. The transmission device (100) according to claim 4, characterized in that: The span angle occupied by the first boss (173) is smaller than the span angle occupied by the interval between adjacent first bosses (173), and the span angle occupied by the second boss is smaller than the span angle occupied by the interval between adjacent second bosses.

6. The transmission device according to any one of claims 1 to 5, characterized in that: The invention also comprises a driving shaft (120) rotatably connected to the housing (110); the driving shaft (120) and the driven shaft (130) are arranged in parallel; the driving shaft (120) is connected to a driving mechanism (140) for driving the driving shaft (120) to rotate; the driving shaft (120) is coaxially sleeved with a plurality of driving gears (160) fixed relative to the driving shaft (120); the driven gear (150) is sleeved on the driven shaft (130) so as to be rotatable relative to the driven shaft (130) but with limited axial movement; the driving gear (160) and the driven gear (150) correspond to each other one by one and the corresponding driving gears (160) and the driven gears (150) are meshed.

7. The transmission device (100) according to claim 6, characterized in that: The driving gear (160) comprises a first driving gear (161) and a second driving gear (162); the driven gear (150) comprises a first driven gear (152) and a second driven gear (153); the first driving gear (161) is meshed with the first driven gear (152); the second driving gear (162) is meshed with the second driven gear (153); and the clutch sleeve (170) is located between the first driven gear (152) and the second driven gear (153).

8. The transmission device (100) according to claim 6, characterized in that: The driving mechanism (140) comprises a driving motor (141), a worm (142) and a worm wheel (143); the worm (142) is connected to the output end of the driving motor (141); the worm (142) is meshed with the worm wheel (143); and the worm wheel (143) is coaxially fixedly connected to the driving shaft (120).

9. A feeder, characterized in that: It comprises a power distribution mechanism (200) and a transmission device (100) as claimed in any one of claims 1 to 8, wherein the input member of the power distribution mechanism (200) is connected to the output end of the driven shaft (130).

10. The feeder according to claim 9, characterized in that: The power distribution mechanism (200) comprises a transition shaft (210) which is balanced on the driven shaft (130) and supported on the housing (110) through bearings and can rotate freely relative to the housing (110), two first drive shafts (220) which are balanced on the transition shaft (210) and supported on the housing (110) through bearings and can rotate freely relative to the housing (110), and two second drive shafts (230) which are balanced on the first drive shafts (220) and supported on the housing (110) through bearings and can rotate freely relative to the housing (110), the driven shaft (130) protruding from the housing (110) is fixedly sleeved with a driving sprocket (136), and the transition shaft (210) is fixedly sleeved with a A driven sprocket (211), a driving sprocket (136) and a driven sprocket (211) are connected and meshed through a chain; a transition gear (250) is sleeved on the inner side of the driven sprocket (211) on the transition shaft (210); two driven gears (221) are fixedly sleeved on the two first drive shafts (220); and the transition gear (250) meshes with the two driven gears (221) at the same time; a first sprocket (222) is provided at the end of the two first drive shafts (220); a second sprocket (231) is provided at the end of the two second drive shafts (230); and the first sprocket (222) and the second sprocket (231) are meshed and transmit power through a first chain (270) and a second chain (280) respectively.

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