Power box chain wheel and chain protection device

Abstract

The utility model relates to the technical field of cleaning machine accessories, in particular to a power box chain wheel and chain protection device which is symmetrically installed on the two sides of a smallest chain wheel of a power box so as to play a role in increasing wrap angles of the small chain wheel and enable chain transmission operation to be more stable and reliable, and therefore the risk of chain tooth skipping is eradicated, and the service life of the power box is prolonged. The chain protection device is composed of a square-opening grooved wheel, a fixing shaft, a bearing, a gasket and a bolt, the bolt, the power box end plate, the gasket and the square-opening grooved wheel sequentially penetrate through the fixing shaft from left to right, and the bearing is arranged between the square-opening grooved wheel and the fixing shaft. The beneficial effects of the utility model are that the device can avoid the problems that the photovoltaic module is worn due to the idle running of the power box caused by the clamping stagnation of the cleaning robot, and the rotation center of each chain wheel and the brush deviates from the center line due to the bending of the end plate caused by the chain jumping out of the chain wheel, thereby avoiding the serious consequence of damaging the transmission shaft and the bearing; the service life of the cleaning robot is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning machine accessories, in particular to a power box sprocket chain protection device. Background Art

[0002] Photovoltaic cleaning robots are devices used to remove dust and other coverings on the surface of photovoltaic panels. Their overall shape is similar to the structure disclosed in the Chinese utility model patent with publication number CN215198455U. This type of cleaning robot includes a main frame, with a power box installed at each end of the frame. The power box is generally driven by a synchronous belt or chain. Chain drive is widely used because it is economical and practical, reliable in operation, and can transmit large power.

[0003] After summarizing a large amount of field operation experimental data, it was found that when the cleaning robot encounters a large resistance and gets stuck, the chain-driven power box idling in place rubs against the photovoltaic modules, which will not only damage the photovoltaic modules, but also cause the chain to jump teeth, sprockets to fall off, etc., which will cause very serious damage to the cleaning machine once it occurs. The end plate is subjected to excessive force and elastic deformation occurs, and even plastic deformation occurs until it breaks. At the same time, the bending deformation of the end plate will indirectly cause the rotation center of each sprocket and brush to deviate, resulting in damage to the transmission shaft, bearings and other components, affecting the service life of the cleaning robot.

[0004] To this end, the present application designs a power box sprocket chain protection device to solve the above problems. Utility Model Content

[0005] In order to make up for the deficiencies in the prior art, the utility model provides a power box sprocket chain protection device.

[0006] A power box sprocket chain protection device, comprising a chain protection device, characterized in that:

[0007] The chain protection device is symmetrically installed on both sides of the smallest sprocket of the power box to increase the wrap angle of the small sprocket, making the chain transmission run more smoothly and reliably, thereby eliminating the risk of chain jumping teeth. The chain protection device consists of a square groove wheel, a fixed shaft, a bearing, a gasket and a bolt. The bolt, the power box end plate, the gasket and the square groove wheel pass through the fixed shaft from left to right in sequence, and a bearing is provided between the square groove wheel and the fixed shaft.

[0008] Furthermore, in order to better realize the utility model, the outer ring of the square groove wheel is provided with a square groove, and the inner ring is also processed with two identical bearing mounting holes, and a bearing is tightly installed on each bearing mounting hole to ensure that the square groove wheel rotates synchronously with the running direction of the chain.

[0009] Furthermore, in order to better realize the utility model, a chain is placed in the middle of the opening of the square groove wheel, and the two side walls of the opening of the square groove wheel limit the up and down movement of the chain during operation. The gap between the square groove wheel and the lower bent plate of the power box end plate is controlled at 5mm. This gap can prevent the chain from sliding out of the opening of the square groove wheel when it falls off.

[0010] Furthermore, in order to better realize the utility model, the shape of the fixed shaft is similar to that of a hexagonal head bolt, and one end is a regular hexagon that can be conveniently tightened with a wrench; a shoulder is processed adjacent to the hexagon, which serves to fix the square groove wheel, and the size of the shoulder is just equal to the inner ring thickness of the bearing in the square groove wheel, and does not affect the rotation of the bearing.

[0011] Furthermore, in order to better realize the utility model, the middle part of the fixed shaft is a high-precision outer circle part, and the outer circle is tightly matched with the bearing in the square-mouth groove wheel; the other end of the fixed shaft is processed with a thread, and the size of the thread is smaller than the size of the high-precision outer circle, so that the square-mouth groove wheel can be fixed with a gasket, and then fixedly installed on the end plate of the power box.

[0012] The beneficial effects of the utility model are:

[0013] The device of the utility model can avoid the problem that the cleaning robot's power box idles and wears out the photovoltaic components due to jamming, the chain jumps out of the sprocket and falls off, causing the end plate to bend, causing the rotation center of each sprocket and brush to deviate from the center line, avoids the serious consequences of damaging the transmission shaft and bearings, and extends the service life of the cleaning robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the installation diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is a cross-sectional view of the square groove wheel of the utility model;

[0017] Figure 4 This is a fixed shaft parts diagram of the utility model.

[0018] In the figure,

[0019] 1. Chain protection device, 2. Power box, 3. Power box end plate, 4. Square groove wheel, 5. Fixed shaft, 6. Bearing, 7. Gasket, 8. Bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] Figure 1-Figure 4 This is a specific embodiment of the utility model, which is a power box chain protection device, including a square groove wheel, a fixed shaft, a bearing, a nut and a gasket. The outer ring of the square groove wheel is provided with a square groove, and the inner ring is processed with two bearing mounting holes, each of which is tightly installed with a bearing; the fixed shaft has a similar appearance to a hexagonal head bolt, one end is hexagonal and can be conveniently tightened with a wrench, and the other end is processed with a thread, which can be used to fix the groove wheel with a nut, and then fixed to the end plate of the power box. The middle part of the fixed shaft is a high-precision outer circle that is tightly matched with the bearing in the square groove wheel; when in use, the chain is placed in the middle of the opening of the square groove wheel, and the two side walls of the opening limit the chain from moving up and down during operation. The gap between the square groove wheel and the lower curved plate of the power box end plate is controlled at 5mm, and this gap can prevent the chain from sliding out of the opening of the square groove wheel when it falls off. Two bearings are symmetrically installed in the middle of the square groove wheel to ensure that the groove wheel can rotate synchronously with the running direction of the chain. Two sets of chain protection devices need to be symmetrically installed for each set of power boxes. The chain protection device is symmetrically installed on both sides of the smallest sprocket to increase the wrap angle of the small sprocket, thereby eliminating the risk of chain jumping. By installing the chain protection device, the cleaning robot can avoid problems such as idling of the power box and wearing of photovoltaic components due to jamming, and the chain jumping off the sprocket and falling off, causing the end plate to bend, resulting in the rotation center of each sprocket and brush deviating from the center line. The serious consequences of damaging the drive shaft and bearings are avoided, and the service life of the cleaning robot is extended.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A power box sprocket chain protection device, comprising a chain protection device (1), characterized in that: The chain protection device (1) is symmetrically mounted on both sides of the smallest sprocket of the power box (2) to increase the wrap angle of the small sprocket, thereby making the chain transmission run more smoothly and reliably, thereby eliminating the risk of chain tooth jumping. The chain protection device (1) is composed of a square groove wheel (4), a fixed shaft (5), a bearing (6), a gasket (7) and a bolt (8). The bolt (8), the power box end plate (3), the gasket (7) and the square groove wheel (4) are passed through the fixed shaft (5) from left to right in sequence. A bearing (6) is provided between the square groove wheel (4) and the fixed shaft (5).

2. The power box sprocket chain protection device according to claim 1 is characterized in that: The outer ring of the square groove wheel (4) is provided with a square groove, and the inner ring is also processed with two identical bearing mounting holes, and a bearing is tightly mounted on each of the bearing mounting holes, so as to ensure that the square groove wheel (4) rotates synchronously with the running direction of the chain.

3. The power box sprocket chain protection device according to claim 1 is characterized in that: A chain is placed in the middle of the opening of the square groove wheel (4), and the two side walls of the opening of the square groove wheel (4) restrict the chain from moving up and down during operation. The gap between the square groove wheel (4) and the lower curved plate of the power box end plate (3) is controlled to be 5 mm, and this gap can prevent the chain from sliding out of the opening of the square groove wheel (4) when it falls off.

4. The power box sprocket chain protection device according to claim 1, characterized in that: The fixed shaft (5) has an appearance similar to that of a hexagonal bolt, with one end being a regular hexagon that can be easily tightened with a wrench; a shaft shoulder is machined adjacent to the hexagon, and the shaft shoulder serves to fix the square groove wheel (4); the size of the shaft shoulder is just equal to the thickness of the inner ring of the bearing (6) in the square groove wheel, and does not affect the rotation of the bearing (6).

5. The power box sprocket chain protection device according to claim 1, characterized in that: The middle part of the fixed shaft (5) is a high-precision outer circle part, and the outer circle is tightly matched with the bearing (6) in the square groove wheel (4); the other end of the fixed shaft (5) is processed with a thread, and the size of the thread is smaller than the size of the high-precision outer circle, thereby being able to cooperate with the gasket (7) to fix the square groove wheel (4), and then fixedly installed on the power box end plate (3).

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