Friction transmission device

Abstract

The utility model relates to the technical field of roller way conveying, and discloses a friction transmission device which is installed below a driving roller way and a driven roller way which are adjacent, a plurality of driving rollers are arranged between the driving roller ways in parallel, a plurality of driven rollers are arranged between the driven roller ways in parallel, and the friction transmission device comprises a friction wheel which is connected with a swing arm device. And the friction wheel extends between the driving roller and the driven roller which are adjacent under the action of the swing arm device, two sides of the friction wheel are respectively pressed and contacted with the driving roller and the driven roller, and the power of the driving roller is transmitted to the driven roller. According to the utility model, the friction wheels are additionally arranged between the driving roller way of the adjacent driving roller way conveyor and the driven roller way of the driven roller way conveyor, so that the power on the driving roller way conveyor is transmitted to the driven roller way conveyor, and each driven roller way conveyor does not need to be independently connected with a power device; the system has the beneficial effects of flexible layout, low cost and reliable performance.

Description

Technical Field

[0001] The utility model relates to the technical field of roller conveyors, in particular to a friction drive device. Background Art

[0002] As a light conveyor equipment with rollers as the conveying carrier and realizing conveying through a reduction motor or an electric roller, power is transmitted between adjacent rollers through a multi-wedge belt. It is mainly used for conveying light materials such as cartons, plastic boxes, turnover boxes, etc. with the weight of a single piece of material not greater than 50 kg, and is widely used in industries such as tobacco, wine, electric power, e-commerce and pharmacy.

[0003] The roller conveyor can be divided into an active roller conveyor and a passive roller conveyor. Each roller conveyor needs to be equipped with a reduction motor or an electric roller. If it is used as a multi-layer receiving platform of a vertical elevator, the roller conveyor on each layer also needs to be equipped with a power device separately, which will lead to an increase in transportation costs and energy waste; in addition, in the case of a large number of layers, as the height increases, the maintenance difficulty and cost of the reduction motor or the electric roller will also increase. Summary of the Utility Model

[0004] In order to overcome the problems in the above background art that each roller conveyor needs to be equipped with a power device separately, resulting in an increase in transportation costs and an increase in the maintenance cost of the power device, the utility model provides a friction drive device. By adding a friction wheel between the active roller of the adjacent active roller conveyor and the passive roller of the passive roller conveyor, the power on the active roller conveyor is transmitted to the passive roller conveyor, and there is no need to connect a power device to each passive roller conveyor separately, which has the beneficial effects of flexible layout, low cost and reliable performance.

[0005] The technical solution of the utility model is as follows:

[0006] A friction drive device is installed below adjacent active rollers and passive rollers. A number of active rollers are arranged in parallel between the active rollers, and a number of passive rollers are arranged in parallel between the passive rollers. The device includes a friction wheel, which is connected to a swing arm device. Under the action of the swing arm device, the friction wheel extends into the space between the adjacent active roller and passive roller, and its two sides are respectively in pressing contact with the two, and transmits the power of the active roller to the passive roller.

[0007] Compared with the prior art, the beneficial effect of this technical solution lies in:

[0008] The friction wheel is in contact with the driving roller and the driven roller in a freely rotating manner, and the torque is transmitted from the driving roller to the driven roller through the frictional force generated at the contact part. The friction drive device realizes power transmission in a mechanical way, which can transmit the power on the driving roller conveyor to the driven roller conveyor. Only a power device needs to be provided for the driving roller conveyor, and there is no need to provide a power device for each driven roller conveyor, thereby reducing costs, saving energy, and the position of the driving roller conveyor can be flexibly adjusted, facilitating the maintenance of the friction drive device, and solving the problems in the background technology that each roller conveyor needs to be equipped with a separate power device, resulting in an increase in transportation costs and an increase in the maintenance cost of the power device; in addition, when the friction wheel does not need to transmit power, the friction wheel can also be lowered and retracted through the swing arm device, which will not affect the normal operation of the roller conveyor. The friction drive device provided by this technical solution has the advantages of flexible layout, simple and compact structure, low cost, reliable performance, energy saving, and convenient maintenance, and is very suitable for popularization and implementation.

[0009] Preferably, the swing arm device includes an outer swing arm. Under the action of the driving device, the outer swing arm rotates up and down around one end thereof, and the other end is connected to the friction wheel and sends the friction wheel between the driving roller and the driven roller when moving upward.

[0010] Further preferably, the driving device includes a cylinder. The end of the piston rod of the cylinder is movably connected to the swing arm device. When the piston rod expands and contracts, it drives the outer swing arm to rotate up and down.

[0011] Further preferably, the cylinder is installed on a cylinder fixing seat and is hinged and fixed to the cylinder fixing seat. The cylinder fixing seat is fixed on a fixed support. Both ends of the fixed support are vertically fixed to the frames on both sides of the driving roller.

[0012] Further preferably, there are two groups of the outer swing arms, which are symmetrically arranged on both sides inside the driving roller. One end of each group is fixedly connected together through a first connecting shaft. The first connecting shaft is perpendicular to the frames on both sides of the driving roller and is fixedly connected to the fixed support through a bearing and can rotate freely in the bearing.

[0013] Further preferably, the middle parts of the two groups of the outer swing arms are respectively fixedly connected to both ends of a cross brace. The cylinder joint at the end of the piston rod of the cylinder is hinged to the mounting seat at the bottom of the cross brace. The piston rod of the cylinder drives the outer swing arm to rotate up and down through the cross brace.

[0014] Further preferably, the two groups of the outer swing arms are arranged vertically opposite to each other. Each group of the outer swing arms includes an integrally formed long rod section and a short rod section. The connection part between the long rod section and the short rod section is an acute angle. Among them, the ends of the long rod sections of the two groups of the outer swing arms are respectively connected to both ends of the first connecting shaft, and the ends of the short rod sections are respectively provided with limit waist holes. Both ends of a third connecting shaft pass through the corresponding limit waist holes and are movably connected thereto.

[0015] Further preferably, friction wheels are respectively connected to the shaft bodies at both ends of the third connecting shaft. The friction wheels are fixed between the bushing and the gland. The bushing is fixedly connected to the third connecting shaft by means of a key connection.

[0016] Further preferably, the swing arm device further includes inner swing arms. There are two groups of inner swing arms, which are respectively located inside the two groups of outer swing arms and are respectively connected in parallel with the outer swing arms.

[0017] Further preferably, one end of the inner swing arm is connected to one end of the second connecting shaft through a bearing. The other end of the second connecting shaft is movably connected to the connection point of the long rod section and the short rod section of the outer swing arm. The other end of the inner swing arm is connected to the third connecting shaft through a bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be described with reference to the drawings, where:

[0019] Figure 1 is the front view of the friction drive device in two states of the cylinder expansion and contraction;

[0020] Figure 2 is the top view of the present utility model;

[0021] Figure 3 is the front view of the friction drive device when the cylinder of the present utility model extends;

[0022] Figure 4 is the front view of the friction drive device when the cylinder of the present utility model retracts;

[0023] Figure 5 is the schematic structural view of the outer swing arm of the present utility model;

[0024] Figure 6 is the schematic structural view of the inner swing arm of the present utility model.

[0025] Reference numerals: driving roller path 1, driving roller 11, driven roller path 2, driven roller 21, frame 3, fixed support 31, friction wheel 4, bushing 41, gland 42, swing arm device 5, outer swing arm 51, long rod section 511, short rod section 512, limit waist hole 513, inner swing arm 52, first connecting shaft 53, second connecting shaft 54, third connecting shaft 55, cross brace 56, mounting seat 561, driving device 6, cylinder 61, piston rod 611, cylinder fixed seat 612, cylinder joint 613, bearing 7, bearing fixed seat 71. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] Embodiment 1: As Figures 1 to 6 shown, a friction drive device is installed below the adjacent driving roller path 1 and the driven roller path 2. The driving roller path 1 includes frames 3 on both sides and a number of driving rollers 11 arranged in sequence along the length direction of the frame 3. The driven roller path 2 includes frames 3 on both sides and a number of driven rollers 21 arranged in sequence along the length direction of the frame 3. Among them, the driven roller path 2 can be raised or lowered. When the driven roller path 2 is set at the same height as the driving roller path 1, the length directions of both extend along the same horizontal line. The friction drive device includes a friction wheel 4, and the friction wheel 4 is connected to a swing arm device 5. The friction wheel 4 extends into the space between the adjacent driving roller 11 and the driven roller 21 under the action of the swing arm device 5, and its two sides are respectively in pressing contact with the side parts of the driving roller 11 and the driven roller 21. When the driving roller 11 rotates, a rotational frictional force is generated with the friction wheel 4, and the friction wheel 4 can transmit the power of the driving roller 11 to the driven roller 21 under the action of the rotational frictional force.

[0028] The swing arm device 5 can drive the friction wheel 4 to move up and down. When the friction drive device is needed to transmit power between the driving roller path conveyor and the driven roller path conveyor, as Figure 1 and Figure 3 shown, the swing arm device 5 drives the friction wheel 4 to move upward and extend into the middle position between the adjacent driving roller 11 and the driven roller 21, and presses against both of them. The driving roller 11 can automatically rotate under the action of the power device. When it contacts the friction wheel 4, the friction force generated at the contact part can drive the friction wheel 4 to rotate freely. The friction wheel 4 contacts the driven roller 21 again, and can also drive the driven roller 21 to rotate freely through the friction force generated at the contact part. Thus, the friction wheel 4 can transmit the power of the driving roller 11 to the driven roller 21, and further achieve the purpose of power transmission; when the friction wheel 4 is not needed to transmit power between the driving roller path conveyor and the driven roller path conveyor, as Figure 1 and Figure 4As shown, the swing arm device 5 drives the friction wheel 4 to move downward away from the driving roller 11 and the driven roller 21, and then conveys the driving roller conveyor to the required working station. Therefore, the friction drive device provided in this embodiment can transfer the power on the driving roller conveyor to the driven roller conveyor. Only a power device needs to be provided for the driving roller conveyor, and there is no need to provide a power device for each driven roller conveyor, which greatly reduces the transportation cost. Moreover, the position of the driving roller conveyor can be flexibly adjusted to facilitate the maintenance of the friction drive device, solving the problems in the background art that each roller conveyor needs to be equipped with a separate power device, resulting in an increase in transportation cost and the maintenance cost of the power device. In addition, when the friction wheel 4 is not required to transfer power, the friction wheel 4 can also be lowered and retracted by the swing arm device 5, without affecting the normal operation of the roller conveyor.

[0029] Embodiment 2: On the basis of Embodiment 1, the swing arm device 5 is preferably designed. The swing arm device 5 includes an outer swing arm 51. The outer swing arm 51 is arranged along the length direction of the frame 3 of the driving roller path 1. One end of it is arranged below the driving roller path 1. Under the action of the driving device 6, the outer swing arm 51 rotates up and down around this end, and the other end is connected to the friction wheel 4 and sends the friction wheel 4 between the driving roller 11 and the driven roller 21 when moving upward. Among them, the driving device 6 includes a cylinder 61. The end of the piston rod 611 of the cylinder 61 is movably connected to the swing arm device 5. When the piston rod 611 expands and contracts, it drives the outer swing arm 51 to rotate up and down. The cylinder 61 is installed on the cylinder fixed seat 612 and is hinged and fixed to the cylinder fixed seat 612. That is, when the piston rod 611 makes a telescopic movement, the whole cylinder 61 can rotate around the connection point with the cylinder fixed seat 612, thereby adjusting the force application direction of the piston rod 611 during expansion and contraction to the swing arm device 5. The cylinder fixed seat 612 is fixed on the fixed support 31, and both ends of the fixed support 31 are fixedly connected to the frames 3 on both sides of the driving roller path 1. In addition, the driving device 6 can also select a motor as the power source.

[0030] Further optimize the design of the outer rotating arm 51. There are two sets of outer rotating arms 51, symmetrically arranged on both sides inside the frame 3 of the active roller path 1 and parallel to the frame 3. One end of the outer rotating arm 51 is fixedly connected together through the first connecting shaft 53, that is, one end of each of the two sets of outer rotating arms 51 is fixedly connected to both ends of the first connecting shaft 53. The connection method can adopt the combined action of key connection and threaded connection to ensure the stability of the connection. The length direction of the first connecting shaft 53 is perpendicular to the length direction of the frame 3 on both sides of the active roller path 1 and is fixedly connected to the fixed support 31 through the bearing 7, that is, the shaft bodies at both ends of the first connecting shaft 53 are respectively sleeved in the bearing 7, and the bearing 7 is fixed in the bearing fixing seat 71. One side of the bearing fixing seat 71 is fixedly connected to the side of the fixed support 31. Thus, the first connecting shaft 53 can maintain a stable connection with the fixed support 31 and can rotate freely in the bearing 7. One end of the outer rotating arm 51 can also rotate up and down effectively and stably with the connection end of the first connecting shaft 53 as the center.

[0031] Further optimize the design of the outer rotating arm 51. A cross brace 56 is fixed in the middle of the two sets of outer rotating arms 51. Both ends of the cross brace 56 are fixedly connected to the middle of the two sets of outer rotating arms 51 respectively. The length direction of the cross brace 56 is also perpendicular to the length direction of the frame 3 of the active roller path 1. The end of the piston rod 611 of the air cylinder 61 is fixed with an air cylinder joint 613, and this air cylinder joint 613 is hinged to the mounting seat 561 at the bottom of the cross brace 56. Since the air cylinder 61 is also fixedly connected through hinge to the air cylinder fixing seat 612, the combined cooperation of the two connection methods can enable the piston rod 611 to continuously adjust the force application direction to the cross brace 56 during the extension process, so that the swing arm device 5 can always send the friction wheel 4 upward between the active roller 11 and the passive roller 21. The piston rod 611 of the air cylinder 61 can drive the outer rotating arm 51 to rotate up and down through the cross brace 56.

[0032] Further optimize the design of the two sets of outer rotating arms 51. The two sets of outer rotating arms 51 are arranged vertically opposite to each other. Each set of outer rotating arms 51 includes an integrally formed long rod section 511 and a short rod section 512. The connection part between the long rod section 511 and the short rod section 512 is an acute angle, and the opening of the acute angle faces upward. Among them, the ends of the long rod sections 511 of the two sets of outer rotating arms 51 are respectively fixedly connected to both ends of the first connecting shaft 53. The ends of the short rod sections 512 are respectively provided with limit waist holes 513, and both ends of the third connecting shaft 55 pass through the corresponding limit waist holes 513 and are movably connected to them, that is, both ends of the third connecting shaft 55 can move in the limit waist holes 513 during the rotation process of the outer rotating arm 51. The setting of the limit waist holes 513 enables the third connecting shaft 55 to adapt to the rotation amplitude of the ends of the short rod sections 512 of the outer rotating arm 51.

[0033] Further optimize the design of the friction wheel 4. Each group of friction wheels 4 consists of two mutually pressed cylindrical friction wheels. When working normally, the driving wheel can drive the driven wheel to rotate by means of the friction force, and keep the transmission ratio basically fixed. A group of friction wheels 4 are respectively connected to the shaft bodies at both ends of the third connecting shaft 55. Each group of friction wheels 4 is fixed between the bushing 41 and the gland 42. The bushing 41 is fixedly connected to the third connecting shaft 55 by means of a key connection. The adjacent driving roller 11 and the driven roller 21 are driven by two groups of friction wheels 4 to improve the transmission efficiency.

[0034] Further optimize the design of the swing arm device 5. The swing arm device 5 further includes an inner swing arm 52. Two groups of inner swing arms 52 are provided inside the two groups of outer swing arms 51 respectively, are arranged parallel to the outer swing arms 51, and are respectively connected to the outer swing arms 51. One end of the inner swing arm 52 is connected to one end of the second connecting shaft 54. The other end of the second connecting shaft 54 is movably connected to the opening at the connection point of the long rod section 511 and the short rod section 512 of the outer swing arm 51. The other end of the inner swing arm 52 is connected to the third connecting shaft 55. This connection method enables the second connecting shaft 54 and the third connecting shaft 55 to freely rotate in the bearing 7 as the outer swing arm 51 rotates, and drives the inner swing arm 52 to flexibly adjust the rotation amplitude with one end as the center and the other end restricted by the limit waist hole 513, so as to jointly control the displacement of the friction wheel 4 with the outer swing arm 51. When there is an error in the position between the adjacent driving roller 11 and the driven roller 21, the friction wheel 4 can still be in contact with the driving roller 11 and the driven roller 21 at the same time. The setting of the inner swing arm 52 enables the outer swing arm 51 to adaptively adjust the position of the friction wheel 4 and eliminate the position error between the driving roller 11 and the driven roller 21.

[0035] During operation, when the roller conveyor equipped with the friction drive device reaches the receiving platform, the control system issues an instruction, and the air cylinder 61 drives the swing arm device 5 to make a swinging motion. The friction wheel 4 is in contact with the driving roller 11 and the driven roller 21 by means of free rotation. The frictional force generated at the contact part transfers the torque from the driving roller 11 at the tail of the driving roller conveyor to the driven roller 21 at the end of the receiving platform roller conveyor, thereby driving the receiving platform roller conveyor to complete the material conveying action. After the action is completed, the control system issues an instruction, and the swing arm device 5 is reset under the drive of the air cylinder 61, and the roller conveyor equipped with the friction drive device runs to the next working station.

[0036] The above embodiments only represent the specific implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A friction transmission device, installed below adjacent active rollers (1) and passive rollers (2), wherein a plurality of active rollers (11) are arranged in parallel between the active rollers (1), and a plurality of passive rollers (21) are arranged in parallel between the passive rollers (2), characterized in that: The invention comprises a friction wheel (4), which is connected to a swing arm device (5). Under the action of the swing arm device (5), the friction wheel (4) extends between adjacent active rollers (11) and passive rollers (21), and its two sides are respectively pressed against the two rollers, and the power of the active roller (11) is transmitted to the passive roller (21).

2. A friction transmission device according to claim 1, characterized in that: The swing arm device (5) comprises an outer swing arm (51). Under the action of the driving device (6), the outer swing arm (51) rotates up and down around one end thereof, and the other end thereof is connected to the friction wheel (4). When the outer swing arm (51) is turned upward, the friction wheel (4) is sent between the active roller (11) and the passive roller (21).

3. A friction transmission device according to claim 2, characterized in that: The driving device (6) comprises a cylinder (61), the end of a piston rod (611) of the cylinder (61) being movably connected to the swing arm device (5), and when the piston rod (611) is extended or retracted, it drives the outer rotating arm (51) to rotate up and down.

4. A friction transmission device according to claim 3, characterized in that: The cylinder (61) is mounted on a cylinder fixing seat (612) and is hingedly fixed to the cylinder fixing seat (612). The cylinder fixing seat (612) is fixed on a fixing support (31). The two ends of the fixing support (31) are vertically fixed to the frames (3) on both sides of the active roller conveyor (1).

5. A friction transmission device according to claim 2, characterized in that: The outer rotating arms (51) are provided with two groups, which are symmetrically arranged on both sides of the active roller conveyor (1), and one end of the outer rotating arms (51) are fixedly connected together through a first connecting shaft (53). The first connecting shaft (53) is perpendicular to the frames (3) on both sides of the active roller conveyor (1), and is fixedly connected to the fixed support (31) through a bearing (7), and can rotate freely in the bearing (7).

6. A friction transmission device according to claim 5, characterized in that: The middle parts of the two groups of outer rotating arms (51) are respectively fixedly connected to the two ends of the cross brace (56); the cylinder joint (613) at the end of the piston rod (611) of the cylinder (61) is hinged to the mounting seat (561) at the bottom of the cross brace (56); the piston rod (611) of the cylinder (61) drives the outer rotating arms (51) to rotate up and down through the cross brace (56).

7. A friction transmission device according to claim 5, characterized in that: The two groups of external rotating arms (51) are arranged vertically and stand opposite to each other. Each group of external rotating arms (51) comprises an integrally formed long rod section (511) and a short rod section (512). The connection between the long rod section (511) and the short rod section (512) is an acute angle. The ends of the long rod sections (511) of the two groups of external rotating arms (51) are respectively connected to the two ends of the first connecting shaft (53), and the ends of the short rod sections (512) are respectively provided with limiting waist holes (513). The two ends of the third connecting shaft (55) pass through the corresponding limiting waist holes (513) and are movably connected thereto.

8. A friction transmission device according to claim 7, characterized in that: The shaft bodies at both ends of the third connecting shaft (55) are respectively connected with friction wheels (4), the friction wheels (4) are fixed between the bushing (41) and the pressure cover (42), and the bushing (41) and the third connecting shaft (55) are fixedly connected by a key connection.

9. A friction transmission device according to claim 7, characterized in that: The swing arm device (5) further comprises an inner rotating arm (52). The inner rotating arm (52) is provided with two groups, which are respectively located on the inner sides of the two groups of outer rotating arms (51) and are respectively connected in parallel with the outer rotating arms (51).

10. A friction transmission device according to claim 9, characterized in that: One end of the inner rotating arm (52) is connected to one end of the second connecting shaft (54) via a bearing (7); the other end of the second connecting shaft (54) is movably connected to a connection point between a long rod section (511) and a short rod section (512) of the outer rotating arm (51); and the other end of the inner rotating arm (52) is connected to a third connecting shaft (55) via a bearing (7).

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