A balance wheel motor device

Abstract

The present invention belongs to the technical field of transportation devices, and specifically relates to a balance wheel motor device, comprising: a frame, on which a first motor and a second motor are arranged; a transmission wheel, which is transmission-connected to the first motor; a balance wheel assembly, which comprises a swing bracket and a roller, wherein the swing bracket is rotationally connected to the frame in a vertical direction, and the roller is rotationally connected to the swing bracket in a horizontal direction, and a transmission belt, wherein the transmission belt is sleeved between the transmission wheel and the roller; and further comprising a tensioning wheel, which is movably connected to the frame so that the tensioning wheel can tighten or loosen the transmission belt between the transmission wheel and the roller. The present invention can realize adaptive adjustment of the tension of the transmission belt through the tensioning wheel, reduce the tension fluctuation amplitude of the transmission belt during the swinging of the roller, avoid excessive tension or relaxation of the transmission belt, and ensure reliable power transmission between the transmission belt and the transmission wheel at any angle of the roller within the stroke.

Description

Technical Field

[0001] The invention belongs to the technical field of transportation devices, and in particular relates to a balance wheel motor device. Background Art

[0002] The balance wheel device is installed on the conveyor line to change the flow direction of goods. The movement process of the balance wheel device mainly has two actions, namely the horizontal rotation movement of the balance wheel itself and the swing of the balance wheel along the vertical axis. The existing balance wheel device often uses O-belt rotation to realize the horizontal rotation movement of the balance wheel itself, that is, the driving wheel transmits power to the balance wheel through the O-belt. Since the O-belt has a certain elasticity, it can ensure that the power between the driving wheel and the balance wheel is not interrupted during the swing of the balance wheel along the vertical axis. However, even so, since the tension of the O-belt will change greatly during the swing of the balance wheel, it will cause the O-belt to be too tight or loose at certain angles. If the O-belt is too tight, the transmission resistance will increase, and if the O-belt is too loose, it will cause the balance wheel to slip. Therefore, there is an urgent need for a device that can adaptively adjust the tension of the O-belt according to the swing angle of the balance wheel. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a balance motor device which can adaptively adjust the tension of the O-belt according to the swing angle of the balance wheel.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a balance wheel motor device, comprising:

[0005] A frame, wherein a first motor and a second motor are provided on the frame;

[0006] A transmission wheel is rotatably connected to the frame in a horizontal direction, and the transmission wheel is transmission-connected to the first motor;

[0007] The balance wheel assembly comprises a swing bracket and a roller, wherein the swing bracket is rotatably connected to the frame in a vertical direction, and the roller is rotatably connected to the swing bracket in a horizontal direction.

[0008] A transmission belt, wherein the transmission belt is an endless belt structure made of elastic material and is sleeved between the transmission wheel and the roller;

[0009] A first linkage mechanism is provided between the second motor and the swing bracket, and the second motor drives the swing bracket to swing between a first angle and a second angle through the first linkage mechanism. When the swing bracket is at the first angle, the axis of the roller is parallel to the axis of the transmission wheel. When the swing bracket is at the second angle, the axis of the roller forms a certain angle with the axis of the transmission wheel.

[0010] It also includes a tensioning wheel, which is in contact with the transmission belt between the transmission wheel and the roller, and the tensioning wheel is movably connected to the frame so that the tensioning wheel can tighten or loosen the transmission belt between the transmission wheel and the roller; a second linkage mechanism is provided between the tensioning wheel and the second motor, and the second linkage mechanism is assembled so that when the second motor drives the swing bracket to swing from the first angle to the second angle, the second motor can drive the tensioning wheel to loosen the transmission belt between the transmission wheel and the roller through the second linkage mechanism, and when the second motor drives the swing bracket to swing from the second angle to the first angle, the second motor can drive the tensioning wheel to tighten the transmission belt between the transmission wheel and the roller through the second linkage mechanism.

[0011] In an optional embodiment of the present invention, the output shaft of the second motor is arranged in a vertical direction, the second linkage mechanism includes a first translation bracket, the first translation bracket is movably connected to the frame along a first direction, the first direction is a horizontal direction perpendicular to the axis of the transmission wheel, the tensioning wheel is movably arranged on the first translation bracket, a first swing arm is provided on the output shaft of the second motor, a first pin is provided at the swinging end of the first swing arm, a waist-shaped hole is provided on the first translation bracket, the length direction of the waist-shaped hole is parallel to the axis direction of the transmission wheel, the first pin is slidably pivoted to the waist-shaped hole, the first swing arm is assembled so that when the output shaft of the second motor is in an initial position, the length direction of the first swing arm is parallel to the first direction, and the initial position refers to the position where the output shaft of the second motor is located when the swing bracket is at the first angle.

[0012] In an optional embodiment of the present invention, the tensioning wheel is rotatably arranged on a rotating bracket, the rotating bracket is rotatably connected to a sliding seat along an axis parallel to the first direction, and the sliding seat is slidably connected to the first translation bracket along a direction parallel to the axis of the transmission wheel.

[0013] In an optional embodiment of the present invention, an annular groove is provided on the wheel surface of the tension wheel, the depth of the annular groove is greater than the cross-sectional diameter of the transmission belt, and the transmission belt passes through the annular groove.

[0014] In an optional embodiment of the present invention, a rotating shaft is provided at the lower end of the swing bracket, a second swing arm is provided on the rotating shaft, a third swing arm is provided on the output shaft of the second motor, the second swing arm and the third swing arm are parallel and equal in length, and the first linkage mechanism includes a second translation bracket, and the second translation bracket is hinged to the swing ends of the second swing arm and the third swing arm, respectively.

[0015] In an optional embodiment of the present invention, a guard plate is provided at the upper end of the swing bracket, the guard plate is arranged horizontally, a hollow portion is provided on the guard plate, and part of the wheel surface of the roller protrudes above the guard plate through the hollow portion.

[0016] In an optional embodiment of the present invention, the transmission wheel, the balance wheel assembly and the tension wheel are provided in plurality, and each of the transmission wheels, each of the balance wheel assemblies and each of the tension wheels are arranged in a rectangular array.

[0017] In an optional embodiment of the present invention, each of the tensioning wheels is mounted on the same first translation bracket, the first translation bracket is provided with a crossbeam arranged parallel to the axis of the transmission wheel, the crossbeam is provided with a slide rail, and the sliding seats corresponding to the tensioning wheels in the same row are slidably connected to the slide rail on the same crossbeam.

[0018] In an optional embodiment of the present invention, the angle difference between the first angle and the second angle is ±70°.

[0019] In an optional embodiment of the present invention, the transmission wheel and the first motor are connected via a synchronous belt pulley mechanism.

[0020] The technical effect of the present invention is that the present invention can realize adaptive adjustment of the tension of the transmission belt through the tensioning wheel, reduce the tension fluctuation amplitude of the transmission belt during the swing of the roller, avoid excessive tension or relaxation of the transmission belt, and ensure reliable power transmission between the transmission belt and the transmission wheel at any angle of the roller within the stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of a balance wheel motor device provided by an embodiment of the present invention;

[0022] Figure 2 is a side view of a balance wheel motor device provided by an embodiment of the present invention;

[0023] Figure 3 is a partial stereoscopic diagram of the balance wheel motor device provided by an embodiment of the present invention in a first state with the frame hidden;

[0024] Figure 4 is a partial stereoscopic diagram of the balance wheel motor device provided by an embodiment of the present invention in a first state with the frame hidden from another viewing angle;

[0025] Figure 5 is a partial top view of the balance wheel motor device provided by an embodiment of the present invention in a first state with the frame hidden;

[0026] Figure 6 yes Figure 5 AA section view;

[0027] Figure 7 is a partial stereoscopic diagram of the balance wheel motor device provided by an embodiment of the present invention in the second state with the frame hidden;

[0028] Figure 8 is a partial stereoscopic diagram of another perspective of the balance wheel motor device provided by an embodiment of the present invention in the second state with the frame hidden;

[0029] Fig. 9 is a partial front view of the balance wheel motor device provided by an embodiment of the present invention in the second state with the frame hidden;

[0030] Fig.10 is a partial top view of the balance wheel motor device provided by an embodiment of the present invention in the second state with the frame hidden;

[0031] Fig.11 yes Fig.10 BB cross-sectional view;

[0032] Explanation of the reference numerals: 10, frame; 101, synchronous pulley mechanism; 11, first motor; 12, second motor; 20, balance wheel assembly; 21, roller; 22, swing bracket; 23, guard plate; 30, first translation bracket; 31, first swing arm; 32, first pin shaft; 33, waist-shaped hole; 34, crossbeam; 35, slide rail; 40, second translation bracket; 41, third swing arm; 42, second swing arm; 50, transmission wheel; 60, tensioning wheel; 61, swivel bracket; 62, slide seat; 70, transmission belt. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] The balance wheel motor device provided by the present invention can be applied to conveyor lines, especially conveyor lines of logistics sorting systems. The balance wheel motor device uses the rotation of the roller in the balance wheel assembly to drive the feeding of goods, and uses the swing of the roller along the vertical axis to adjust the feeding direction of the goods. The roller is driven by the transmission wheel and the transmission belt. The present invention realizes adaptive adjustment of the tension of the transmission belt through the tensioning wheel, reduces the fluctuation amplitude of the tension of the transmission belt during the swing of the roller, avoids excessive tension or relaxation of the transmission belt, and ensures that reliable power transmission can be performed between the transmission belt and the transmission wheel at any angle within the travel of the roller.

[0036] The technical solution of the present invention is described in detail below in conjunction with specific embodiments:

[0037] See also Figure 1-Figure 11 As shown, the balance wheel motor device provided by the embodiment of the present invention includes a frame 10, a transmission wheel 50, a balance wheel assembly 20, a transmission belt 70 and a tension wheel 60; the frame 10 is provided with a first motor 11 and a second motor 12; the transmission wheel 50 is rotatably connected to the frame 10 in the horizontal direction, and the transmission wheel 50 is transmission-connected to the first motor 11; the balance wheel assembly 20 includes a swing bracket 22 and a roller 21, the swing bracket 22 is rotatably connected to the frame 10 in the vertical direction, and the roller 21 is rotatably connected to the swing bracket 22 in the horizontal direction; the transmission belt 70 is an endless belt structure made of elastic material, and the transmission belt 70 is sleeved between the transmission wheel 50 and the roller 21; a first linkage mechanism is provided between the second motor 12 and the swing bracket 22, and the second motor 12 drives the swing bracket 22 to swing between a first angle and a second angle through the first linkage mechanism, and when the swing bracket 22 is at the first angle, the axis of the roller 21 is parallel to the axis of the transmission wheel 50, and the swing When the bracket 22 is located at the second angle, the axis of the roller 21 forms a certain angle with the axis of the transmission wheel 50; the tensioning wheel 60 contacts the transmission belt 70 between the transmission wheel 50 and the roller 21, and the tensioning wheel 60 is movably connected to the frame 10 so that the tensioning wheel 60 can tighten or loosen the transmission belt 70 between the transmission wheel 50 and the roller 21; a second linkage mechanism is provided between the tensioning wheel 60 and the second motor 12, and the second linkage mechanism is configured such that when the second motor 12 drives the swing bracket 22 to swing from the first angle to the second angle, the second motor 12 can drive the tensioning wheel 60 to loosen the transmission belt 70 between the transmission wheel 50 and the roller 21 through the second linkage mechanism, and when the second motor 12 drives the swing bracket 22 to swing from the second angle to the first angle, the second motor 12 can drive the tensioning wheel 60 to tighten the transmission belt 70 between the transmission wheel 50 and the roller 21 through the second linkage mechanism.

[0038] It should be understood that since the vertical distance between the roller 21 and the transmission wheel 50 is fixed, in the absence of a tensioning wheel 60, when the roller 21 swings relative to the transmission wheel 50, the path length of the transmission belt 70 will change. Specifically, when the roller 21 is at a first angle, the path length of the transmission belt 70 is the shortest. When the roller 21 swings from the first angle to the second angle, the path length of the transmission belt 70 increases and the transmission belt 70 is stretched. When installing the transmission belt 70, if the tension of the transmission belt 70 is appropriately ensured at the first angle, the transmission belt 70 will be too tight at the second angle. If the tension of the transmission belt 70 is appropriately ensured at the second angle, the transmission belt 70 will be too loose at the first angle.

[0039] The present invention provides a tensioning wheel 60, and when the swing bracket 22 swings from the first angle to the second angle, as shown in FIG. Fig.11 As shown, the tension wheel 60 loosens the transmission belt 70 between the transmission wheel 50 and the roller 21, and when the swing bracket 22 swings from the second angle to the first angle, as shown in FIG. Figure 6 As shown, the tension wheel 60 compresses the transmission belt 70 between the transmission wheel 50 and the roller 21, so the length of the transmission belt 70 can be designed with a certain redundancy. When the roller 21 is at a first angle, the tension wheel 60 compresses the redundant part of the transmission belt 70, and when the roller 21 is at a second angle, the tension wheel 60 releases the redundant part of the transmission belt 70 to supplement the stretching of the transmission belt 70 caused by the torsion, ensuring that the transmission belt 70 can have a better tension at both the first angle and the second angle. It should be understood that the specific tension of the transmission belt 70 needs to be determined based on factors such as the torque and rotation speed of the transmission wheel 50, and the surface friction coefficient of the roller 21, the transmission wheel 50, and the transmission belt 70. Those skilled in the art should be able to select a suitable tension based on these factors, and the specific value of the tension is not the focus of the present invention, so the present invention will not repeat it.

[0040] See also Figure 3-Figure 11As shown, in an optional embodiment of the present invention, the output shaft of the second motor 12 is arranged in a vertical direction, and the second linkage mechanism includes a first translation bracket 30, and the first translation bracket 30 is movably connected to the frame 10 along a first direction, and the first direction is a horizontal direction perpendicular to the axis of the transmission wheel 50, and the tensioning wheel 60 is movably arranged on the first translation bracket 30, and a first swing arm 31 is provided on the output shaft of the second motor 12, and a first pin shaft 32 is provided at the swinging end of the first swing arm 31, and a waist-shaped hole 33 is provided on the first translation bracket 30, and the length direction of the waist-shaped hole 33 is parallel to the axis direction of the transmission wheel 50, and the first pin shaft 32 is slidably pivoted with the waist-shaped hole 33, and the first swing arm 31 is assembled so that when the output shaft of the second motor 12 is in an initial position, the length direction of the first swing arm 31 is parallel to the first direction, and the initial position refers to the position where the output shaft of the second motor 12 is located when the swing bracket 22 is at the first angle. It should be noted that, in a specific embodiment, two second angles are generally provided, and the two second angles are symmetrical about the first angle, so that the balance wheel assembly 20 can guide the goods to both sides of the conveyor line as needed. The swing of the balance wheel assembly 20 from the first angle to two different second angles needs to be achieved by the forward and reverse rotation of the second motor 12. To this end, the present invention assembles the first swing arm 31 so that when the output shaft of the second motor 12 is in the initial position, the length direction of the first swing arm 31 is parallel to the first direction. At this time, no matter whether the second motor 12 rotates forward or reverse, the first swing arm 31 can drive the first translation bracket 30 to translate in the same direction, thereby ensuring that no matter whether the second motor 12 rotates forward or reverse, the tensioning wheel 60 can loosen the transmission belt 70.

[0041] See also Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, in an optional embodiment of the present invention, the tension wheel 60 is rotatably arranged on a swivel bracket 61, the swivel bracket 61 is rotatably connected to a slide 62 along an axis parallel to the first direction, and the slide 62 is slidably connected to the first translation bracket 30 along a direction parallel to the axis of the transmission wheel 50. An annular groove is provided on the wheel surface of the tension wheel 60, the depth of the annular groove is greater than the cross-sectional diameter of the transmission belt 70, and the transmission belt 70 passes through the annular groove. It should be understood that when the roller 21 is located at the second angle, the transmission belt 70 will be twisted, that is, the projection of the transmission belt 70 in the first direction will be tilted, as shown in FIG. Fig. 9As shown, in order to ensure that the tensioning wheel 60 can smoothly press the transmission belt 70 when the roller 21 returns to the first angle, the present invention arranges the tensioning wheel 60 into a movable structure, that is, the tensioning wheel 60 can swing freely following the transmission belt 70, and the tensioning wheel 60 is always inseparable from the transmission belt 70 under the limiting action of the annular groove, thereby ensuring that the tensioning wheel 60 can smoothly press the transmission belt 70 when the roller 21 returns to the first angle.

[0042] See also Figure 3 , Figure 7 As shown, in an optional embodiment of the present invention, a rotating shaft is provided at the lower end of the swing bracket 22, a second swing arm 42 is provided on the rotating shaft, a third swing arm 41 is provided on the output shaft of the second motor 12, the second swing arm 42 and the third swing arm 41 are parallel and of equal length, and the first linkage mechanism includes a second translation bracket 40, and the second translation bracket 40 is respectively hinged to the swing ends of the second swing arm 42 and the third swing arm 41. It should be understood that the second swing arm 42, the third swing arm 41, the second translation bracket 40 and the frame 10 in this embodiment constitute a parallel four-bar linkage mechanism, so the swing bracket 22 and the output shaft of the second motor 12 can achieve synchronous rotation.

[0043] See also Figure 3 , Fig.11 As shown, in an optional embodiment of the present invention, a guard plate 23 is provided at the upper end of the swing bracket 22, the guard plate 23 is horizontally arranged, and a hollow portion is provided on the guard plate 23, and a part of the wheel surface of the roller 21 protrudes above the guard plate 23 through the hollow portion. The guard plate 23 can fill the hole area on the sweeping path of the roller 21 to prevent foreign objects from falling into the lower space and interfering with the transmission mechanism.

[0044] See also Figure 1 , Figure 3-Figure 5 , Figure 7-10 As shown, in an optional embodiment of the present invention, the transmission wheel 50, the balance wheel assembly 20 and the tension wheel 60 are provided in plurality, and each of the transmission wheels 50, each of the balance wheel assembly 20 and each of the tension wheels 60 are arranged in a rectangular array. Each of the tension wheels 60 is mounted on the same first translation bracket 30, and the first translation bracket 30 is provided with a crossbeam 34 arranged parallel to the axis of the transmission wheel 50, and the crossbeam 34 is provided with a slide rail 35, and the slide seat 62 corresponding to the tension wheels 60 in the same row is slidably connected to the slide rail 35 on the same crossbeam 34, which simplifies the transmission structure and reduces the equipment cost.

[0045] In an optional embodiment of the present invention, the angular difference between the first angle and the second angle is ±70°. It should be noted that, since the traditional balance wheel mechanism cannot achieve adaptive adjustment of the tension, in order to avoid the transmission belt 70 being too tight, the swing range of the roller 21 is generally small, about ±45°. Since the present invention achieves adaptive adjustment of the tension of the transmission belt 70, it can effectively increase the swing range of the roller 21.

[0046] See also Figure 1 , Figure 2 As shown, in an optional embodiment of the present invention, the transmission wheel 50 is connected to the first motor 11 via a synchronous pulley mechanism 101. The synchronous pulley mechanism 101 can make the rotation speed of the roller 21 precisely controllable, so as to accurately predict the position of the goods during high-speed sorting.

[0047] In summary, the present invention provides the tensioning wheel 60, and when the swing bracket 22 swings from the first angle to the second angle, as shown in FIG. Fig.11 As shown, the tension wheel 60 loosens the transmission belt 70 between the transmission wheel 50 and the roller 21, and when the swing bracket 22 swings from the second angle to the first angle, as shown in FIG. Figure 6 As shown, the tensioning wheel 60 presses the transmission belt 70 between the transmission wheel 50 and the roller 21, so the length of the transmission belt 70 can be designed with a certain redundancy. When the roller 21 is at the first angle, the tensioning wheel 60 presses the redundant part of the transmission belt 70, and when the roller 21 is at the second angle, the tensioning wheel 60 releases the redundant part of the transmission belt 70 to supplement the stretching caused by the torsion of the transmission belt 70, thereby ensuring that the transmission belt 70 can have a better tension at both the first angle and the second angle; the present invention arranges the tensioning wheel 60 into a movable structure, that is, the tensioning wheel 60 can swing freely with the transmission belt 70, and the tensioning wheel 60 is always inseparable from the transmission belt 70 under the limiting action of the annular groove, thereby ensuring that when the roller 21 returns to the first angle, the tensioning wheel 60 can smoothly press the transmission belt 70.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

[0049] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. A balance wheel motor device, characterized in that: include: A frame (10), wherein a first motor (11) and a second motor (12) are provided on the frame (10); A transmission wheel (50) is rotatably connected to the frame (10) in a horizontal direction, and the transmission wheel (50) is transmission-connected to the first motor (11); A balance wheel assembly (20), the balance wheel assembly (20) comprising a swing bracket (22) and a roller (21), the swing bracket (22) being rotatably connected to the frame (10) in a vertical direction, and the roller (21) being rotatably connected to the swing bracket (22) in a horizontal direction. a transmission belt (70), wherein the transmission belt (70) is an endless belt structure made of elastic material, and the transmission belt (70) is sleeved between the transmission wheel (50) and the roller (21); A first linkage mechanism is provided between the second motor (12) and the swing bracket (22); the second motor (12) drives the swing bracket (22) to swing between a first angle and a second angle via the first linkage mechanism; when the swing bracket (22) is at the first angle, the axis of the roller (21) is parallel to the axis of the transmission wheel (50); when the swing bracket (22) is at the second angle, the axis of the roller (21) forms a certain angle with the axis of the transmission wheel (50); The invention also comprises a tensioning wheel (60), wherein the tensioning wheel (60) contacts the transmission belt (70) between the transmission wheel (50) and the roller (21), and the tensioning wheel (60) is movably connected to the frame (10) so that the tensioning wheel (60) can tighten or loosen the transmission belt (70) between the transmission wheel (50) and the roller (21); a second linkage mechanism is provided between the tensioning wheel (60) and the second motor (12), and the second linkage mechanism is arranged so that when the second motor (12) drives the swing bracket (22 ) when the second motor (12) swings from the first angle to the second angle, the second motor (12) can drive the tensioning wheel (60) through the second linkage mechanism to loosen the transmission belt (70) between the transmission wheel (50) and the roller (21); and when the second motor (12) drives the swing bracket (22) to swing from the second angle to the first angle, the second motor (12) can drive the tensioning wheel (60) through the second linkage mechanism to tighten the transmission belt (70) between the transmission wheel (50) and the roller (21); The output shaft of the second motor (12) is arranged in a vertical direction, the second linkage mechanism comprises a first translation bracket (30), the first translation bracket (30) is movably connected to the frame (10) in a first direction, the first direction being a horizontal direction perpendicular to the axis of the transmission wheel (50), the tension wheel (60) is movably arranged on the first translation bracket (30), a first swing arm (31) is arranged on the output shaft of the second motor (12), a first pin shaft (32) is arranged at the swing end of the first swing arm (31), a waist-shaped hole (33) is arranged on the first translation bracket (30), the length direction of the waist-shaped hole (33) is parallel to the axis direction of the transmission wheel (50), the first pin shaft (32) is slidably pivoted to the waist-shaped hole (33), the first swing arm (31) is assembled so that when the output shaft of the second motor (12) is located in an initial position, the length direction of the first swing arm (31) is parallel to the first direction, the initial position refers to the position where the output shaft of the second motor (12) is located when the swing bracket (22) is located at the first angle; A rotating shaft is provided at the lower end of the swing bracket (22), a second swing arm (42) is provided on the rotating shaft, a third swing arm (41) is provided on the output shaft of the second motor (12), the second swing arm (42) and the third swing arm (41) are parallel and of equal length, and the first linkage mechanism comprises a second translation bracket (40), the second translation bracket (40) being hinged to the swing ends of the second swing arm (42) and the third swing arm (41), respectively.

2. The balance wheel motor device according to claim 1, characterized in that: The tension wheel (60) is rotatably mounted on a swivel bracket (61); the swivel bracket (61) is rotatably connected to a slide seat (62) along an axis parallel to the first direction; the slide seat (62) is slidably connected to the first translation bracket (30) along a direction parallel to the axis of the transmission wheel (50).

3. The balance wheel motor device according to claim 2, characterized in that: An annular groove is provided on the wheel surface of the tension wheel (60), the depth of the annular groove being greater than the cross-sectional diameter of the transmission belt (70), and the transmission belt (70) passes through the annular groove.

4. The balance wheel motor device according to claim 1, characterized in that: A guard plate (23) is provided at the upper end of the swing bracket (22). The guard plate (23) is arranged horizontally. A hollow portion is provided on the guard plate (23), and part of the wheel surface of the roller (21) protrudes above the guard plate (23) through the hollow portion.

5. The balance wheel motor device according to claim 2, characterized in that: A plurality of the transmission wheels (50), the balance wheel assemblies (20) and the tension wheels (60) are provided respectively, and the transmission wheels (50), the balance wheel assemblies (20) and the tension wheels (60) are arranged in a rectangular array.

6. The balance wheel motor device according to claim 5, characterized in that: Each of the tensioning wheels (60) is mounted on the same first translation bracket (30); a crossbeam (34) arranged parallel to the axis of the transmission wheel (50) is provided on the first translation bracket (30); a slide rail (35) is provided on the crossbeam (34); and the slide seats (62) corresponding to the tensioning wheels (60) in the same row are slidably connected to the slide rail (35) on the same crossbeam (34).

7. The balance wheel motor device according to claim 1, characterized in that: The angular difference between the first angle and the second angle is ±70°.

8. The balance wheel motor device according to claim 1, characterized in that: The transmission wheel (50) and the first motor (11) are transmission-connected via a synchronous pulley mechanism (101).

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