An extendable belt conveyor

Abstract

This utility model discloses a retractable belt conveyor, including a belt, a roller, a support frame, a drive device, and a tensioning device. The belt is tensioned on the roller, which is mounted on the support frame. The roller includes a driving roller, a driven roller, and a tensioning roller. The drive device is connected to the driving roller, and the tensioning device is connected to the tensioning roller and adjusts its position. The support frame includes a main body and a telescopic part. The telescopic part is slidably mounted on the main body via a slider-rail assembly. This retractable belt conveyor uses a sliding rail and slider for guidance, resulting in minimal error and smoother operation during telescopic movement. The use of an electric roller enables forward belt transport and saves space. The tensioning roller has a knurled surface, and the belt is designed to prevent deflection, increasing axial friction and preventing belt misalignment. The tensioning roller incorporates back-to-back angular contact bearings, making it less prone to damage under large axial forces.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyors, and in particular to a retractable belt conveyor. Background Technology

[0002] A belt conveyor is a continuous transport machine that uses a conveyor belt as the traction and load-bearing component. In practical applications, telescopic belt conveyors are set up according to usage needs, which are telescopic belt conveyors.

[0003] The telescopic belt conveyor mainly consists of a belt, rollers, support frame, drive unit, tensioning device, and other components. When the telescopic belt conveyor starts, the drive unit provides power to rotate the rollers, thereby driving the belt to move. The material is placed on the belt, and as the rollers rotate, the material is transported to the designated area.

[0004] Due to varying transport distances, the telescopic length of the belt conveyor needs to be adjusted according to actual conditions. This telescopic function is typically achieved by adjusting the position of the support frame or changing the installation position of the rollers.

[0005] The most common malfunction of belt conveyors during operation is belt misalignment. To avoid belt misalignment, it is crucial to pay close attention to the dimensional accuracy of the installation. Furthermore, if the belt conveyor's extension length is adjusted, the tension of the belt on the rollers will also change, affecting the dimensional accuracy of the belt installation and making it prone to misalignment. Summary of the Invention

[0006] The purpose of this invention is to construct a retractable belt conveyor guided by a slider rail, based on the existing belt conveyor and the need to reduce the dimensional deviation caused by adjusting the telescopic length of the belt conveyor.

[0007] A retractable belt conveyor includes a belt, a roller, a support frame, a drive unit, and a tensioning device. The belt is tensioned on the roller, which is mounted on the support frame. The roller includes a drive roller, a driven roller, and a tensioning roller. The drive unit is connected to the drive roller and provides it with power. The tensioning device is connected to the tensioning roller and adjusts its position. The support frame includes a main body and a telescopic part, and the telescopic part is slidably mounted on the main body via a slider rail assembly.

[0008] Furthermore, the drive device includes a motor, a drive shaft, a driven shaft, a first chain drive mechanism, and a second chain drive mechanism, with the motor mounted on the main body.

[0009] The first chain drive mechanism consists of a first driving sprocket, a first driven sprocket, and a first chain. The first chain meshes with the first driving sprocket and the first driven sprocket. The motor is connected to the first driving sprocket.

[0010] The second chain drive mechanism has two sets located at the two ends of the driving and driven shafts, respectively. The second chain drive mechanism consists of a second driving sprocket, a second driven sprocket, and a second chain. The second chain meshes with the second driving sprocket and the second driven sprocket.

[0011] The first driven sprocket and the second driving sprocket are both mounted on the driving drive shaft, the second driven sprocket is mounted on the driven drive shaft, and the second chain is provided with a connector, through which the telescopic part is fixedly connected to the second chain.

[0012] Furthermore, the main body includes vertically arranged plates that are symmetrical in the left and right positions (with the extension direction of the telescopic part as the front). A slide rail is provided on the side of the plate near the center of symmetry, and a slider is slidably connected on the slide rail. The left and right outer walls of the telescopic part are respectively fixedly connected to the sliders located on the left and right sides.

[0013] Furthermore, the support frame is provided with a fixed protective plate and a telescopic protective plate symmetrically positioned on the left and right sides. The fixed protective plate is vertically arranged on the main body, and the telescopic protective plate is vertically arranged on the telescopic part. The telescopic protective plate is slidably connected to the fixed protective plate, and the telescopic protective plate slides as the telescopic part extends and retracts.

[0014] Furthermore, the driving roller is disposed on the main body, the driven roller includes a head roller and a redirecting roller, the head roller is disposed at the front end of the telescopic part, the redirecting roller is disposed between the left and right sliders, the tensioning roller is disposed on the main body through a tensioning device, and the belt is tensioned on the driving roller, the head roller, the redirecting roller and the tensioning roller.

[0015] Furthermore, the knurled surface of the tensioning roller increases axial friction, making it less likely for the belt to deviate.

[0016] Furthermore, the belt is designed to prevent deflection, ensuring that the belt is not prone to deviation.

[0017] Furthermore, the tensioning roller has a built-in back-to-back angular contact bearing, which makes the tensioning roller less prone to damage when subjected to large axial forces.

[0018] Furthermore, the drive roller is either an electric roller or connected to a power source. Since the structure of the telescopic belt conveyor is relatively complex, using an electric roller as the drive roller is the optimal choice.

[0019] Furthermore, the tensioning device is provided in two sets, and is located on the left and right sides of the tensioning roller respectively. The tensioning device includes a guide shaft, a limiting bolt and a mounting base. The tensioning roller is disposed between the guide shafts on the left and right sides. The mounting bases on the left and right sides are respectively disposed on the left and right outer walls of the main body. The guide shaft is disposed on the mounting base by the limiting bolt.

[0020] Furthermore, the main body is also provided with limit switches. There are two limit switches located on the same horizontal line, and the distance between the touch points on the two limit switches is the extension distance of the telescopic part.

[0021] Furthermore, the lower part of the telescopic protective plate is provided with bristles, which bend as the telescopic part retracts, and the length of the bristles is greater than the telescopic stroke of the telescopic part.

[0022] Furthermore, the lower end of the main body is provided with four support leg assemblies, which are respectively located at the four corners.

[0023] The beneficial effects of this utility model are as follows: 1. Traditional telescopic belt conveyors use bearing-guided telescopic movement, while the belt conveyor in this utility model uses a combination of slide rails and sliders for guidance, resulting in smaller errors and smoother operation during the sliding telescopic movement of the telescopic part; 2. The drive roller is an electric roller, which can achieve positive-direction conveying of the belt by adjusting the electric roller, and saves space in the belt conveyor; 3. The tension roller has knurled surfaces, which increases axial friction and makes the belt less prone to deviation; 4. The belt is an anti-deflection belt, which makes it less prone to deviation; 5. The tension roller has built-in back-to-back angular contact bearings, which makes the tension roller less prone to damage when subjected to large axial forces.

[0024] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a specific example of the belt conveyor of this utility model;

[0027] Figure 2 yes Figure 1 The left view;

[0028] Figure 3 yes Figure 1 The main view;

[0029] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0030] Figure 5 This is a partial structural schematic diagram of a specific example of the belt conveyor of this utility model;

[0031] Figure 6 yes Figure 5 Top view;

[0032] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure;

[0033] In the diagram: 101, belt; 102, telescopic protective plate; 103, brush bristles; 104, fixed protective plate; 105, outrigger assembly; 106, mounting side plate; 107, stroke device; 108, tensioning device; 110, motor; 112, head roller; 113, second chain drive mechanism; 114, connector; 115, telescopic side plate; 116, slide rail; 117, drive roller; 118, tensioning roller; 119, redirecting roller; 120, slider; 121, second mounting beam; 122, first mounting beam; 123, first chain drive mechanism; 124, connecting rib; 125, limit bolt; 128, guide shaft; 129, mounting base; 130, driven drive shaft; 131, drive drive shaft; 133, mounting front plate. Detailed Implementation

[0034] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] The retractable belt conveyor of this utility model will be further described with reference to the accompanying drawings.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the belt conveyor in this embodiment includes a support frame, which consists of a main body and a telescopic part, with the telescopic part slidably mounted on the active part. The main body includes a mounting side plate 106, a first mounting beam 122, and a second mounting beam 121. The first mounting beam 122 and the second mounting beam 121 are arranged in parallel. The mounting side plate 106 has two parts, located on the left and right sides respectively. The left and right ends of the first mounting beam 122 and the second mounting beam 121 are fixedly connected to the mounting side plate 106. A front mounting plate 133 is fixedly mounted on the front end of the mounting side plate 106.

[0037] Fixed protective plates 104 are fixedly installed on the upper surfaces of the mounting side plates 106 on both the left and right sides. A telescopic protective plate 102 is fixedly installed on the upper surface of the telescopic part. The front end of the fixed protective plate 104 has an opening. The telescopic protective plate 102 passes through the opening and is slidably connected to the fixed protective plate 104. Brushes 103 are provided below the telescopic protective plate 102. The brushes 103 will be squeezed and bent by the fixed protective plate 104 as the telescopic part retracts. The length of the brushes 103 is greater than the telescopic stroke of the telescopic part. The brushes 103 can prevent the goods on the belt conveyor from falling or getting stuck in the gaps.

[0038] The main body is equipped with a tensioning device 108 and a stroke device 107. Four support leg assemblies 105 are fixedly installed on the lower end face of the main body, and the support leg assemblies 105 are distributed at the four corners of the main body.

[0039] The support frame is equipped with a drive device, such as Figure 3 , Figure 4 As shown, the drive device includes a motor 110, a drive shaft 131, a driven shaft 130, a first chain drive mechanism 123, and a second chain drive mechanism 113. The motor 110 is fixedly mounted on the first mounting beam 122. The drive shaft 131 and the driven shaft 130 are arranged in parallel and at the same horizontal height. The left and right ends of the drive shaft 131 and the driven shaft 130 are respectively connected to the mounting side plates 106 on the left and right sides.

[0040] The first chain drive mechanism 123 consists of a first driving sprocket, a first driven sprocket, and a first chain. The first driving sprocket is located at the right end of the motor 110, the first driven sprocket is located on the driving drive shaft 131, and the first chain meshes with the first driving sprocket and the first driven sprocket.

[0041] The second chain drive mechanism 113 has two sets located at the left and right ends of the drive shaft 131 and the driven shaft 130, respectively. The second chain drive mechanism consists of a second drive sprocket, a second driven sprocket, and a second chain. The second drive sprocket is mounted on the drive shaft 131, and the second driven sprocket is mounted on the driven shaft 130. The second chain meshes with the second drive sprocket and the second driven sprocket.

[0042] like Figure 5 and Figure 6 As shown, a connector 114 is provided on the upper half of the second chain, and a connecting rib 124 is fixedly installed between the connectors 114 on the left and right sides. The connecting rib 124 is fixedly connected to the lower end face of the telescopic part.

[0043] Slide rails 116 are fixedly installed on the side plates 106 on both the left and right sides. Slider 120 is slidably mounted on slide rails 116. Slider 120 consists of two sliding parts and a mounting plate. The sliding parts are slidably mounted on slide rails 116 and the two sliding parts are connected by the mounting plate.

[0044] like Figure 2 , Figure 4 As shown, the telescopic part includes telescopic side plates 115. There are two telescopic side plates 115, which are symmetrically positioned on the left and right. The two telescopic side plates 115 are fixedly connected to the sliders 120 located on the left and right sides, respectively. The telescopic protective plates 102 on the left and right sides are fixedly installed on the upper ends of the two telescopic side plates 115.

[0045] The support frame is equipped with rollers, and the belt 101 is tensioned on the rollers. The belt is designed to prevent deflection, ensuring that the belt does not easily run off-track.

[0046] like Figure 4 and Figure 7 As shown, the roller includes a drive roller 117, a head roller 112, a redirecting roller 119, and a tensioning roller 118. The drive roller 117 is located at the rear end of the mounting side plate 106, and the head roller 112 is located at the front end of the telescopic side plate 115. The telescopic side plate 115 has an opening at the position where it connects with the slider 120. The redirecting roller 119 is located between the left and right sliders 120 and passes through the opening on the telescopic side plate 115. The left and right ends of the tensioning roller 118 are respectively located on the outer walls of the mounting side plates 106 on the left and right sides through the tensioning device 108. The belt is tensioned on the drive roller 117, the head roller 112, the redirecting roller 119, and the tensioning roller 118.

[0047] The knurled surface of the tension roller 118 increases axial friction, making the belt less prone to deviation.

[0048] The drive roller 117 is an electric roller.

[0049] Two sets of tensioning devices 108 are provided, located on the outer walls of the mounting side plates 106 on the left and right sides respectively. Each tensioning device 108 includes a guide shaft 128, a limiting bolt 125, and a mounting base 129. The tensioning roller 118 includes a back-to-back angular contact bearing built into its end, making it less prone to damage when subjected to large axial forces. The mounting base 129 is fixedly mounted on the outer wall of the mounting side plate 106. The guide shaft 128 is fixedly mounted on the mounting base 129 by the limiting bolt 125. The locking position of the guide shaft 128 is adjustable. The tensioning roller 118 is positioned between the left and right guide shafts 128.

[0050] like Figure 1 and Figure 5 As shown, the stroke device 107 is disposed on the outer wall of the right mounting side plate 106. There are two stroke devices 107 and they are located on the same horizontal straight line. The mounting side plate 106 is provided with a slot. The touch point on the stroke device 107 passes through the slot and extends into the interior. The distance between the touch points on the two stroke devices 107 is the extension distance of the extension part.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A retractable belt conveyor, comprising a belt, a roller, a support frame, a drive unit, and a tensioning device, wherein the belt is tensioned on the roller, the roller is mounted on the support frame, the roller includes a driving roller, a driven roller, and a tensioning roller, the drive unit is connected to the driving roller and provides power to it, and the tensioning device is connected to the tensioning roller and adjusts its position, characterized in that, The support frame includes a main body and a telescopic part, wherein the telescopic part is slidably mounted on the main body via a slider and slide rail assembly. The main body includes vertically arranged plates that are symmetrical in the left and right positions. A slide rail is provided on the side of the plate near the center of symmetry, and a slider is slidably connected to the slide rail. The left and right outer walls of the telescopic part are respectively fixedly connected to the sliders located on the left and right sides.

2. The retractable belt conveyor according to claim 1, characterized in that, The drive device includes a motor, a drive shaft, a driven shaft, a first chain drive mechanism, and a second chain drive mechanism. The motor is mounted on the main body. The first chain drive mechanism consists of a first driving sprocket, a first driven sprocket, and a first chain. The first chain meshes with the first driving sprocket and the first driven sprocket. The motor is connected to the first driving sprocket. The second chain drive mechanism has two sets located at the two ends of the driving and driven shafts, respectively. The second chain drive mechanism consists of a second driving sprocket, a second driven sprocket, and a second chain. The second chain meshes with the second driving sprocket and the second driven sprocket. The first driven sprocket and the second driving sprocket are both mounted on the driving drive shaft, the second driven sprocket is mounted on the driven drive shaft, and the second chain is provided with a connector, through which the telescopic part is fixedly connected to the second chain.

3. The retractable belt conveyor according to claim 1, characterized in that, The support frame is provided with fixed protective plates and telescopic protective plates symmetrically positioned on the left and right. The fixed protective plates are vertically arranged on the main body, and the telescopic protective plates are vertically arranged on the telescopic part. The telescopic protective plates are slidably connected to the fixed protective plates, and the telescopic protective plates slide as the telescopic part extends and retracts.

4. The retractable belt conveyor according to claim 1, characterized in that, The driving roller is disposed on the main body, the driven roller includes a head roller and a redirecting roller, the head roller is disposed at the front end of the telescopic part, the redirecting roller is disposed between the left and right sliders, the tensioning roller is disposed on the main body through a tensioning device, and the belt is tensioned on the driving roller, the head roller, the redirecting roller and the tensioning roller.

5. A retractable belt conveyor according to claim 4, characterized in that, The tensioning roller has a knurled surface and a built-in back-to-back angular contact bearing.

6. The retractable belt conveyor according to claim 1, characterized in that, The belt is a belt designed to prevent deflection.

7. A retractable belt conveyor according to claim 4, characterized in that, The drive roller is an electric roller.

8. A retractable belt conveyor according to claim 4, characterized in that, The tensioning device is provided in two sets, and is located on the left and right sides of the tensioning roller respectively. The tensioning device includes a guide shaft, a limiting bolt and a mounting base. The tensioning roller is disposed between the guide shafts on the left and right sides. The mounting bases on the left and right sides are respectively disposed on the left and right outer walls of the main body. The guide shaft is disposed on the mounting base by the limiting bolt.

9. A retractable belt conveyor according to claim 1, characterized in that, The main body is also provided with limit switches. There are two limit switches located on the same horizontal line. The distance between the touch points on the two limit switches is the extension distance of the telescopic part.

10. A retractable belt conveyor according to claim 3, characterized in that, The telescopic protective plate is provided with bristles at its bottom. The bristles bend as the telescopic part retracts, and the length of the bristles is greater than the telescopic stroke of the telescopic part.

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