Telescopic conveyor

Abstract

The utility model discloses a telescopic conveyor which comprises a base frame, wherein a roller mechanism is mounted below the base frame; the base frame comprises a base side frame and a base bottom frame; comprising a telescopic frame, a telescopic driving mechanism and a telescopic transmission mechanism, and the telescopic frame is movably installed above the lower frame of the base frame; the telescopic driving mechanism controls the telescopic frame to stretch out of or retract into the base frame through the telescopic transmission mechanism. And the belt driving mechanism drives the conveying belt to operate through a belt transmission mechanism. According to the utility model, the design is ingenious, the conveying stroke distance of the goods can be prolonged through the telescopic frame capable of stretching and retracting, and the height of the conveyed goods can be adjusted by lifting and descending the front part of the base frame and the telescopic frame; and in the process that the telescopic frame extends out of the base frame, the gravity center of the conveyor is adjusted through the balance weight mechanism, so that balanced stretching and retracting are achieved, and the stability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyors, in particular to a telescopic conveyor. Background Art

[0002] In the process of agricultural production, when loading grains, fertilizers, etc., using a conveyor for loading can save a large amount of manpower and greatly improve labor efficiency. However, some current conveyors have a short conveying stroke path and a fixed conveying height, which cannot meet more needs. For example, when the conveying stroke path of some conveyors is short, the vehicle needs to be parked close to the conveyor. Sometimes, due to road or other conditions, this requirement cannot be met. And if the conveyor is made to adapt to the sufficient length of the path required for conveying goods, it must be made very long, which is not conducive to the transportation and storage of the conveyor. Or as the height of the goods piled up on the vehicle during conveying continuously increases, it is necessary to increase the height reached by the goods during conveying to increase the loading volume. Therefore, it is necessary to improve the existing conveyor to provide a conveyor that can not only be telescoped to increase the conveying stroke distance but also adjust the height reached by the goods during conveying. Summary of the Invention

[0003] Therefore, based on the above background, the utility model provides a telescopic conveyor, which can not only extend the conveying stroke distance of goods through a telescopic frame that can be telescoped, but also adjust the height reached by the goods during conveying by lifting and lowering the front part of the base frame and the telescopic frame.

[0004] The technical solution provided by the utility model is as follows:

[0005] A telescopic conveyor, characterized in that it comprises:

[0006] A base frame, with a roller mechanism installed below; the base frame includes a base side frame and a base bottom frame;

[0007] A telescopic mechanism, including a telescopic frame, a telescopic drive mechanism, and a telescopic transmission mechanism, the telescopic frame is movably installed above the lower frame of the base frame; the telescopic drive mechanism controls the telescopic frame to extend or retract into the base frame through the telescopic transmission mechanism;

[0008] A belt drive mechanism, the belt drive mechanism drives the conveyor belt to run through a transmission mechanism.

[0009] One implementation is that it further includes a lifting mechanism, the lifting mechanism includes a lifting drive mechanism and a lifting component, and the lifting drive mechanism controls the front part of the base frame and the telescopic frame to be lifted and lowered through the lifting component.

[0010] One implementation is that a counterweight mechanism for cooperating with the telescopic movement of the telescopic frame is provided on the base side frame.

[0011] One implementation is that a first idler roller is rotatably provided on the base side frame, and the telescopic frame is located between the first idler roller and the base bottom frame.

[0012] One implementation is that a first roller shaft and a second roller shaft are respectively provided corresponding to the front and rear parts of the telescopic frame 2;

[0013] A third roller shaft is provided at the rear part of the base frame;

[0014] The belt driving mechanism is connected with a driving roller shaft through a transmission mechanism;

[0015] When the telescopic frame is in a partially or fully retracted state, the conveyor belt is wound and cooperated with the first roller shaft, the second roller shaft, the third roller shaft and the driving roller shaft. When the telescopic frame is in a fully extended state, the conveyor belt is wound and cooperated with the first roller shaft, the third roller shaft and the driving roller shaft.

[0016] One implementation is that a second idler roller is rotatably provided on the side frame of the telescopic frame, and a second idler roller bracket is provided below the second idler roller;

[0017] The telescopic transmission mechanism includes a telescopic roller shaft, a first pulling rope and a first guide pulley. The telescopic driving mechanism is connected with the telescopic roller shaft, and the telescopic driving mechanism drives the telescopic roller shaft to rotate; the first guide pulley is installed on the second idler roller bracket;

[0018] One end part of the first pulling rope is wound around the telescopic roller shaft, and after the other end is knotted and fixed to the second frame rod at the rear part of the bottom frame of the telescopic frame, it is connected to the telescopic roller shaft after being turned by the first guide pulley.

[0019] One implementation is that the roller mechanism includes a first roller, and the first rollers are connected by an axle shaft;

[0020] The lifting assembly includes a second roller, a second pulling rope and a second guide pulley. The second roller is rotatably sleeved on the first connecting shaft. The first connecting shaft is connected with the axle shaft through a second connecting shaft, and the end part of the second connecting shaft is rotatably installed on the axle shaft;

[0021] A U-shaped frame is provided below the base frame. The U-shaped frame includes a second bottom rod, and the second bottom rod cooperates with the second roller, and the second roller can slide along the second bottom rod.

[0022] The lifting driving mechanism is connected with a wire reel, and the lifting driving mechanism drives the wire reel to rotate;

[0023] After one end portion of the second drawstring winds around the wire reel, the other end thereof is connected to the first frame rod after passing through a second guide wheel on the first frame rod respectively located on the first connecting shaft and the bottom frame of the base.

[0024] In one implementation, the counterweight mechanism includes a counterweight block, a guide rod consistent with the extending direction of the side frame of the base, a third drawstring, and a third guide wheel;

[0025] The front and rear sides of the counterweight block are respectively connected to one end of the third drawstring, and the other end of the third drawstring is respectively connected to the second roller bracket after being deflected by the third guide wheel;

[0026] The counterweight block is slidably connected in cooperation with the guide rod.

[0027] In one implementation, there is a guide wheel on the base frame that cooperates with the first bottom rod of the side frame of the telescopic frame.

[0028] Adopting the above technical solution, the beneficial effects are as follows:

[0029] The utility model is ingeniously designed. It can not only extend the conveying travel distance of goods through the telescopic frame that can be telescoped, but also adjust the height at which the goods are conveyed to reach by lifting and lowering the front part of the base frame and the telescopic frame;

[0030] During the process of the telescopic frame extending out of the base frame, the counterweight mechanism adjusts the center of gravity of the conveyor to achieve balanced telescoping and improve the stability of the device. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 Structural schematic of the present utility model Figure 1 。

[0033] Figure 2 Structural schematic of the present utility model Figure 2 。

[0034] Figure 3 Structural schematic of the present utility model Figure 3 。

[0035] Figure 4 Structural schematic of the present utility model Figure 4。

[0036] Figure 5 is the structural schematic diagram of the present utility model Figure 5 。

[0037] Figure 6 is the structural schematic diagram of the present utility model Figure 6 。

[0038] Figure 7 is Figure 6 the enlarged structural view of the circled part.

[0039] Figure 8 is the structural schematic diagram of the present utility model Figure 7 。

[0040] Figure 9 is the structural schematic diagram of the present utility model Figure 8 。

[0041] Figure 10 is the structural schematic diagram of the present utility model Figure 9 。

[0042] Figure 11 is Figure 10 the enlarged structural view of the circled part.

[0043] Figure 12 is the structural schematic diagram of the lifting mechanism of the present utility model.

[0044] Figure l3 is the structural schematic diagram of the counterweight mechanism.

[0045] Figure 14 is the structural schematic diagram of the present utility model Figure 10 。 Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0047] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0048] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0049] The present utility model will be further described below with reference to the accompanying drawings.

[0050] Embodiment 1: Refer to Figures 1 to 14 a telescopic conveyor as shown, which is characterized in that it includes:

[0051] a base frame 1, with a roller mechanism installed below; the base frame 1 includes a base side frame 11 and a base bottom frame;

[0052] a telescopic mechanism 2, including a telescopic frame 2, a telescopic drive mechanism 7, and a telescopic transmission mechanism. The telescopic frame 2 is movably installed above the lower frame of the base frame 1; the telescopic drive mechanism 7 controls the telescopic frame 2 to extend or retract into the base frame 1 through the telescopic transmission mechanism;

[0053] a belt drive mechanism 5, which drives the conveyor belt 4 to run through a belt transmission mechanism.

[0054] Specifically, the front and rear orientations involved in this embodiment are the corresponding orientations during actual use, such as Figure 1 the orientation FB pointed by the arrow, and the left and right orientations are LR pointed by the arrow.

[0055] It further includes a lifting mechanism, which includes a lifting drive mechanism 6 and a lifting component. The lifting drive mechanism 6 controls the front part of the base frame and the telescopic frame 2 to be lifted and lowered through the lifting component.

[0056] The base side frame 11 is provided with a counterweight mechanism that cooperates with the telescopic movement of the telescopic frame 2.

[0057] A first idler 12 is rotatably provided on the base side frame 11, and the telescopic frame 2 is located between the first idler 12 and the bottom frame.

[0058] Specifically, as Figure 7 shown, a first idler support 13 is provided on the base side frame below the first idler 12. The number of a set of first idlers is 2. One end of the first idler is rotatably installed on the base side frame, and the other end is rotatably installed on the docking base 131, and the docking base is installed on the first idler support 131. Specifically, the telescopic frame is located between the first idler support 13 and the bottom frame.

[0059] A first roller shaft 23 and a second roller shaft 24 are respectively rotatably provided at the front and rear parts of the telescopic frame 2;

[0060] A third roller shaft 14 is provided at the rear part of the base frame 1;

[0061] The belt driving mechanism 5 is connected with a driving roller shaft 61 through a transmission mechanism, and the belt driving mechanism drives the driving roller shaft to rotate through the transmission mechanism. Specifically, the first roller shaft 23, the second roller shaft 24, and the third roller shaft 14 can all be installed on the telescopic frame and the base frame through bearings correspondingly.

[0062] When the telescopic frame 2 is in a partially or fully retracted state, the conveyor belt is wound and matched with the first roller shaft 23, the second roller shaft 24, the third roller shaft 14, and the driving roller shaft 61. When the telescopic frame is in a fully extended state, the conveyor belt is wound and matched with the first roller shaft 23, the third roller shaft 14, and the driving roller shaft 61. In specific implementation, when the telescopic frame 2 is in a fully extended state, it does not disengage from the base frame.

[0063] In specific implementation, the belt driving mechanism includes a first motor, and the first motor can be a unidirectional motor or a bidirectional motor. The transmission mechanism includes a first transmission mechanism 8 and a second transmission mechanism 9 (as can be seen Figure 4As shown in the figure, specifically, the first transmission mechanism and the second transmission mechanism are both belt transmission mechanisms. The first transmission mechanism and the second transmission mechanism are connected by a transmission shaft. Specifically, the first transmission mechanism includes a first driving pulley and a first driven pulley connected to the first motor shaft. A belt is wound around and cooperates with the first driving pulley and the first driven pulley. The second transmission mechanism includes a second driving pulley and a second driven pulley. A belt is wound around and cooperates with the second driving pulley and the second driven pulley. The first driven pulley is connected to a transmission shaft, and the other end of the transmission shaft is connected to the second driving pulley. A driving roller shaft is connected to the second driven transmission wheel. In this way, it can be realized that the first motor can drive the driving roller shaft to rotate by using the transmission mechanism. The cooperation of the driving roller shaft with the first roller shaft, the second roller shaft, and the third roller shaft can drive the conveyor belt 4 to run when the telescopic frame is partially or fully in the retracted state. When the telescopic frame is in the maximum extended state (i.e., the fully extended state), the conveyor belt is disengaged from the winding and cooperation state with the second roller shaft. The cooperation of the driving roller shaft, the second roller shaft, and the third roller shaft drives the conveyor belt 4 to run. In this way, the conveyor belt can adapt to the telescopic change of the telescopic frame.

[0064] More specifically, as Figure 2 shown, there may be another embodiment. Guide and limit rods extending in the left-right direction are provided on the base frame and the telescopic frame. The conveyor belt can be suitably passed through between the guide and limit rods and the first frame rod and the second frame rod, which not only plays a supporting role but also can play a guiding and limiting role.

[0065] A second idler roller 22 is rotatably provided on the side frame 21 of the telescopic frame 2. A second idler roller bracket 25 is provided below the second idler roller 22. The structures of the second idler roller and the second idler roller bracket are similar to the structures of the first idler roller and the first idler roller bracket.

[0066] Specifically, as Figure 10 shown, the telescopic transmission mechanism includes a telescopic roller shaft 130, a first pulling rope 140, and a first guide pulley 150. The telescopic driving mechanism 7 is connected to the telescopic roller shaft 130, and the telescopic driving mechanism drives the telescopic roller shaft 130 to rotate. The first guide pulley 160 is installed on the second idler roller bracket 25. The telescopic driving 7 mechanism includes a two-way second motor. The second motor drives the telescopic roller shaft 130 to rotate through a third transmission mechanism. Specifically, the third transmission mechanism is a chain transmission mechanism. The chain transmission mechanism includes a driving sprocket and a driven sprocket connected to the rotating shaft of the second motor. The driving sprocket and the driven sprocket are wound and cooperated with a chain, and the driven sprocket is connected to the telescopic roller shaft 130. Specifically, the telescopic driving mechanism and the telescopic roller shaft are suitably installed on the base frame.

[0067] One end portion of the first drawstring 140 is wound around the telescopic roller shaft 130. After its other end is knotted and fixed to the second frame rod 25 at the rear of the bottom frame of the telescopic frame 2, it is connected to the telescopic roller shaft 130 after being deflected by the first guide wheel 150. That is, the middle portion of the drawstring is knotted and fixed to the second frame rod 25. More specifically, the first drawstring will not wind and change on the second frame rod.

[0068] Specifically, the connections of the two ends of the first drawstring to the telescopic roller shaft are respectively located on both sides of it. For example Figure 10 as described, one end portion of the first drawstring is wound around the right side of the telescopic roller shaft, and the other end is connected to the left side of the telescopic roller shaft, and a part of the first drawstring can also be wound around this end.

[0069] The operation process of the upper telescopic transmission mechanism is as follows:

[0070] As Figure 1 and Figure 10 shown, when the telescopic frame is in the fully contracted state, when controlling the telescopic frame to be in the extended state, by controlling the rotation of the second motor, the telescopic roller shaft 130 rotates (as Figure 10 shown, the telescopic roller shaft rotates counterclockwise), so that the part of the first drawstring wound around the telescopic roller shaft on the right side of the telescopic roller shaft is released, and the other end (connected to the left side of the telescopic roller shaft) is wound around it as the telescopic roller shaft rotates. During this process, the first drawstring applies a force to the second frame rod, pulling it to move forward to the front part of the base frame, thereby driving the telescopic frame to extend out of the base frame; when contracting, the second motor is controlled to make the telescopic roller shaft rotate (as Figure 10 shown, the telescopic roller shaft rotates clockwise), so that the first drawstring on the right side of the telescopic roller shaft rotates and winds around it, and the part of the first drawstring of the other end ((connected to the left side of the telescopic roller shaft)) wound around the telescopic roller shaft is released. During this process, the first drawstring applies a force to the second frame rod, pulling it to move backward to the rear part of the base frame, thereby driving the telescopic frame to continuously be located between the first idler roller and the bottom frame for contraction.

[0071] As Figure 4 and Figure 12As shown, the roller mechanism includes a first roller 3, and the first rollers 3 are connected by an axle shaft 31; the lifting assembly includes a second roller 190, a second cable 200, and a second guide pulley 220. The second roller 190 is rotatably sleeved on a first connecting shaft 180. The first connecting shaft 180 is connected to the axle shaft 31 through a second connecting shaft 170. The end of the second connecting shaft 170 is rotatably installed on the axle shaft 31. Specifically, as shown in the figure, both ends of the second connecting shaft 170 can be rotatably sleeved on the axle shaft and the first connecting shaft through sleeves. More specifically, the base frame is connected to the axle shaft through a third connecting shaft 16. A U-shaped frame 15 is provided below the base frame 1. The U-shaped frame 15 is located behind the axle shaft. The U-shaped frame includes a second bottom rod 151. The second bottom rod 151 cooperates with the second roller 190, and the second roller 190 can slide along the second bottom rod 151. The lifting drive mechanism is connected to a cable reel 61, and the lifting drive mechanism drives the cable reel 61 to rotate; the lifting drive includes a third motor, and the rotating shaft of the third motor is connected to the cable reel. One end of the second cable 200 is partially wound around the cable reel 61, and the other end is connected to the first frame rod 15 on the first connecting shaft 180 and the base bottom frame through the second guide pulley 200 located thereon.

[0072] The working process of lifting on it is as follows:

[0073] When the present invention is working, as Figure 1 shown, the rear part of the base frame is inclined downward and touches the ground. Then the second bottom rod of the U-shaped frame 15 is inclined, with the front end higher than the rear end. When it is necessary to lift the front part of the base frame and the telescopic frame, the third motor is controlled to drive the cable reel to rotate, so that one end of the second cable is wound around the cable reel. During this process, the non-wound part of the second cable is continuously shortened, generating a pulling force on the first connecting shaft 180, thereby driving the second roller to move upward along the second bottom rod. Then, the axle is pushed upward through the second connecting shaft, thereby driving the front part of the base frame and the telescopic frame upward. If the front part of the base frame and the telescopic frame are to be lowered, the third motor is controlled to release the second cable from the cable reel, so that the second roller slides downward along the second bottom rod.

[0074] As Figure 13As shown in the figure, the counterweight mechanism includes a counterweight block 100, a guide rod 102 that is consistent with the extension direction of the side frame of the base, a third pulling rope 102, and a third guide pulley 150. The front and rear sides of the counterweight block 100 are respectively connected to one end of the third pulling rope 102, and the other ends of the third pulling ropes are respectively turned through the third guide pulley 150 and then connected to the second idler bracket 25. Specifically, the two ends of the third pulling rope can be respectively connected to the same second idler bracket, for example, by bolt connection or tying connection. The counterweight block 100 is slidably connected in cooperation with the guide rod. There is a guide pulley 120 on the base frame 1 that cooperates with the first bottom rod 26 of the side frame 21 of the telescopic frame 2.

[0075] Specifically, as Figure 13 shown in the figure, the guide rod 102 is welded to the base frame, a third roller 101 is welded to the lower part of the counterweight block, a guide groove is provided on the guide rod, and the third roller can move along the guide groove. However, the implementation method is not limited to the above. For example, through the cooperation relationship between the second roller and the second bottom rod, at this time, the second guide rod can be a round rod, and the third roller is laterally matched with the second guide rod.

[0076] When the present utility model is in use, its rear part is in contact with the ground. During the telescopic process of the telescopic frame, it will affect the center of the overall equipment. For example, when the telescopic frame extends, the center of the equipment moves forward, which may cause the rear part of the base frame to be unable to contact the ground. Therefore, a counterweight mechanism is adopted to balance the center of gravity of the equipment during the telescopic process of the telescopic frame, so that the rear part of the base frame always contacts the ground to ensure stability.

[0077] The working process of the center balance of the counterweight mechanism:

[0078] When the telescopic frame continuously extends from the base frame, as the telescopic frame continuously moves forward, the counterweight block is pulled backward by the third pulling rope to balance the forward movement of the center of gravity caused by the telescopic frame extending from the base frame. Correspondingly, when the telescopic frame contracts onto the base frame, as the telescopic frame continuously moves backward, the counterweight block is pulled forward by the third pulling rope.

[0079] Specifically, the counterweight block is a solid iron block.

[0080] During specific implementation, the first pulling rope, the second pulling rope, and the third pulling rope are preferably steel wires, specifically oiled steel wires. The conveyor belt is a rubber conveyor belt.

[0081] It should be noted here that in order to better display the component structure of this embodiment, some frame rods of the base frame and the telescopic frame are omitted. Attached Figure l4It is a relatively more complete framework, with more perfect reinforcing support diagonal bars compared to other drawings, especially on the base side frame 11 and the telescopic side frame. Of course, in specific implementation, the base frame and the telescopic frame can be adaptively designed under the condition of meeting the functions.

[0082] The utility model has been trial-produced and put into operation. When the telescopic frame is fully telescoped, the length of the equipment can reach 8m, and when the telescopic frame is fully extended, the length of the equipment can reach 13m.

[0083] Embodiment 2: According to Figures 1 to 14 a telescopic conveyor as described above, in this embodiment, a control box (not shown) is provided on the base frame, and control buttons corresponding to the first motor, the second motor, and the third motor are arranged in the control box.

[0084] And the first motor, the second motor, and the third motor can adopt wireless remote control motors. The wireless remote control motors are existing mature products and will not be elaborated here.

[0085] The above has described the utility model and its implementation manners. Such a description is not restrictive. What is shown in the drawings is only one of the implementation manners of the utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the utility model, they shall fall within the protection scope of the utility model.

Claims

1. A telescopic conveyor, characterized in that, Comprising: A base frame, with a roller mechanism installed below; the base frame includes a base side frame and a base bottom frame; A telescopic mechanism, including a telescopic frame, a telescopic drive mechanism, and a telescopic transmission mechanism. The telescopic frame is movably installed above the lower frame of the base frame; the telescopic drive mechanism controls the telescopic frame to extend or retract into the base frame through the telescopic transmission mechanism; A belt drive mechanism, which drives the conveyor belt to run through a transmission mechanism.

2. The telescopic conveyor according to claim 1, characterized in that It further includes a lifting mechanism, which includes a lifting drive mechanism and a lifting component. The lifting drive mechanism controls the front part of the base frame and the telescopic frame to lift and lower through the lifting component.

3. A telescopic conveyor according to claim 1, wherein The base side frame is provided with a counterweight mechanism that cooperates with the telescopic movement of the telescopic frame.

4. A telescopic conveyor according to claim 1, characterized in that, A first idler is rotatably provided on the base side frame, and the telescopic frame is located between the first idler and the base bottom frame.

5. A telescopic conveyor according to claim 1, characterized in that, The front and rear parts of the telescopic frame are respectively provided with a first roller shaft and a second roller shaft; The rear part of the base frame is provided with a third roller shaft; The belt drive mechanism is connected with a drive roller shaft through a transmission mechanism; When the telescopic frame is in a partially or fully retracted state, the conveyor belt is wound and cooperated with the first roller shaft, the second roller shaft, the third roller shaft, and the drive roller shaft. When the telescopic frame is in a fully extended state, the conveyor belt is wound and cooperated with the first roller shaft, the third roller shaft, and the drive roller shaft.

6. A telescopic conveyor according to claim 3, characterized in that, A second idler is rotatably provided on the side frame of the telescopic frame, and a second idler bracket is provided below the second idler; The telescopic transmission mechanism includes a telescopic roller shaft, a first pull rope, and a first guide wheel. The telescopic drive mechanism is connected with the telescopic roller shaft, and the telescopic drive mechanism drives the telescopic roller shaft to rotate; the first guide wheel is installed on the second idler bracket; One end part of the first pull rope is wound around the telescopic roller shaft, and its other end is knotted and fixed to the second frame rod at the rear of the bottom frame of the telescopic frame, and then is connected to the telescopic roller shaft after turning through the first guide wheel.

7. A telescopic conveyor according to claim 2, wherein, The roller mechanism includes a first roller, and the first rollers are connected by an axle; The lifting component includes a second roller, a second pull rope, and a second guide wheel. The second roller is rotatably sleeved on a first connecting shaft, the first connecting shaft is connected with the axle through a second connecting shaft, and the end part of the second connecting shaft is rotatably installed on the axle; A U-shaped frame is provided below the base frame, and the U-shaped frame includes a second bottom rod, and the second bottom rod cooperates with the second roller, and the second roller can slide along the second bottom rod; The lifting drive mechanism is connected with a wire reel, and the lifting drive mechanism drives the wire reel to rotate; One end part of the second pull rope is wound around the wire reel, and its other end is connected to the same first frame rod after passing through the second guide wheels respectively located on the first connecting shaft and the first frame rod on the base bottom frame.

8. A telescopic conveyor according to claim 6, characterized in that, The counterweight mechanism includes a counterweight block, a guide rod consistent with the extending direction of the base side frame, a third pull rope, and a third guide wheel; The front and rear sides of the counterweight are respectively connected to one end of the third pulling rope, and the other ends of the third pulling ropes are respectively connected to the second idler bracket after being turned by the third guide pulley; The counterweight is slidably connected in cooperation with the guide rod.

9. A telescopic conveyor according to claim 1, characterized in that, There are guide pulleys on the base frame that cooperate with the first bottom rod of the side frame of the telescopic frame.

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