Chain type large log conveying device

Abstract

The invention relates to the technical field of wood processing, in particular to a chain type large log conveying device which comprises a bottom plate, a driving motor is fixedly mounted at the top of the bottom plate, a main friction disc is fixedly mounted at the output end of the driving motor, and an auxiliary friction disc matched with the main friction disc is arranged at the top of the bottom plate. A main driving wheel and a transmission rod are rotationally arranged at the top of the bottom plate, an auxiliary driving wheel is fixedly installed between every two adjacent first sleeve rods, and a transmission belt is wound between the main driving wheel and the auxiliary driving wheels. When it is detected that logs are in the slicing working condition, the conveying speed is synchronously reduced so as to adapt to the high-resistance working condition; the stability of machining operation is guaranteed, and meanwhile the output torque is increased to meet the high-resistance operation requirement; after the slicing operation is finished, the device automatically recovers to the initial conveying speed, the conveying efficiency of the round logs to the slicer is improved, meanwhile, the torque is synchronously reduced, and the situation that a clutch friction disc is damaged due to long-term high-load working conditions is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wood processing, and particularly relates to a chain type large log conveying device. BACKGROUND

[0002] As a core equipment in the field of log processing, the log splitting machine will bear a large cutting resistance when implementing the splitting operation on the log, especially in the initial stage of the contact between the cutter and the log, and thus is prone to unstable phenomena such as backward movement and vibration, which not only affects the splitting precision and processing quality, but also may cause additional damage to the equipment parts. The current mainstream log conveying device adopts a constant speed conveying mode, which cannot adaptively adjust according to the resistance change in the cutting process. When the cutting resistance of the log is transmitted to the conveying device, the conveying device still maintains the original speed to run, which further aggravates the unstable state of the log and causes problems such as shifting and deviation, and seriously restricts the processing stability. In order to improve the above working conditions, some technical solutions detect the running state of the log in real time by setting multiple sensors, and then dynamically control the speed and torque of the motor to realize the adaptation of conveying and cutting. However, a large amount of debris is generated in the log cutting process, and such debris is easy to adhere to and invade the surface and internal structure of the sensor, causing damage to the sensor, leading to the attenuation of detection accuracy and even functional failure. The sensor needs to be cleaned and maintained frequently, which additionally increases the labor and time cost, and the overall cost of the multi-sensor linkage structure is high, which is difficult to be widely applied in small and medium-sized processing scenes. Therefore, the present application provides a chain type large log conveying device. SUMMARY

[0003] The present application aims to provide a chain type large log conveying device to solve the problems in the background art.

[0004] The technical scheme of the present application is: a chain type large log conveying device, comprising a bottom plate, a driving motor is fixedly installed on the top of the bottom plate, a main friction disc is fixedly installed on the output end of the driving motor, an auxiliary friction disc is arranged on the top of the bottom plate and matched with the main friction disc, a main drive wheel and a transmission rod are rotatably arranged on the top of the bottom plate, a gear one and a rotating disc are fixedly installed at the two ends of the transmission rod respectively, a plurality of water holes penetrating the central through hole are arranged on the outer ring surface of the rotating disc at equal intervals, a plurality of sleeve one are communicated at equal intervals on the outer ring surface of the rotating disc, and the sleeve one are communicated with the corresponding water holes respectively, a sleeve rod one is slidably arranged in each sleeve one, an auxiliary drive wheel is fixedly installed between every two adjacent sleeve rod ones, and a transmission belt is wound between the main drive wheel and the plurality of auxiliary drive wheels. The device adopts a pure mechanical structure to detect the debarking operation state of the log. When the log is detected to be in the debarking operation state, the transmission power of the driving motor to the conveying mechanism is actively adjusted through the linkage structure. In the debarking operation stage, the conveying speed is reduced synchronously to adapt to the high resistance working condition, the stability of the processing operation is ensured, the output torque is increased to match the high resistance operation demand, and the normal advancement of the debarking operation is ensured. After the debarking operation is completed, the device automatically recovers to the initial conveying speed, the conveying efficiency of the log to the debarking machine is improved, the torque is reduced synchronously, and the damage of the clutch friction disc due to long-term high load working condition is avoided. The device has fewer electric elements, lower failure rate in the running process, and more controllable overall manufacturing cost.

[0005] Preferably, a base is slidably arranged on the top of the bottom plate, a disc is rotatably connected to the base, two symmetrical slide rods one are slidably arranged on the disc, the slide rods one are fixedly connected with the side wall of the auxiliary friction disc, a spring one is wound on the outer ring surface of each slide rod one, and the plurality of springs one are connected between the disc and the auxiliary friction disc. A slide rod two is slidably arranged on the side wall of the auxiliary friction disc. In use, the driving motor drives the main friction disc to rotate, the auxiliary friction disc is tightly abutted with the main friction disc under the elastic force of the spring one, and the rotating main friction disc drives the auxiliary friction disc to rotate synchronously.

[0006] Preferably, a frame is fixedly installed on the top of the bottom plate, a slide block one is slidably arranged in the slide way on the two sides of the frame, a transmission shaft is rotatably connected between the two slide block ones, and the main drive wheel is fixedly sleeved on the transmission shaft. A universal joint is arranged between the transmission shaft and the slide rod two. The subsequently arranged auxiliary friction disc drives the slide rod two, the universal joint, the transmission shaft and the main drive wheel to rotate, and the main drive wheel drives the plurality of auxiliary drive wheels to rotate synchronously around the rotating disc as the axis through the transmission belt. Preferably, the bottom plate top fixedly installed with the main frame body, the main frame body is rotatably connected with a plurality of linkage roller, a plurality of linkage roller around the chain, the chain is fixedly installed with a plurality of concave tooth plate at equal intervals, one of the linkage roller end fixedly installed with drive rod, the drive rod away from the linkage roller side end fixedly installed with gear two, the gear one and gear two around the transmission chain, the auxiliary drive wheel driven sleeve rod one, sleeve one, rotating disc, transmission rod and gear one rotation, the gear one is driven by the transmission chain gear two, drive rod and one of the linkage roller rotation; one of the linkage roller through the chain drive a plurality of linkage roller synchronous rotation, in turn, the chain on the concave tooth plate drive to be flaked log flaker direction of movement.

[0007] Preferably, the main frame body both ends between the side wall fixedly installed with auxiliary frame body, the auxiliary frame body both sides of the slide are slidably provided with slide block two, two slide block two between fixedly installed with cross bar, the cross bar body is fixedly provided with auxiliary upper clamping wheel, each of the slide block two side wall is welded with sleeve rod two, each of the sleeve rod two rod body around spring two, the auxiliary frame body both sides are fixedly installed with sleeve two, and a plurality of sleeve rod two are respectively slidably arranged in the corresponding sleeve two inside, the setting of auxiliary upper clamping wheel can assist the concave tooth plate to the delivery work of round wood, in turn, keep the stability of round wood conveying process.

[0008] Preferably, the frame body side wall fixedly installed with sleeve three, the sleeve three and sleeve two between the pipeline one, one of the slide block one is welded with push rod one, the rotating disc end rotatably connected with sleeve four, and the push rod one both sides end respectively slide in sleeve three and sleeve four.

[0009] Preferably, the sleeve five is fixedly installed on the side wall of the frame, the pipeline two is communicated between the sleeve four and the sleeve five, the push rod two is fixedly installed on the side wall of the base, and the side end of the push rod two away from the base is slidably arranged in the sleeve five; when the log is in contact with the cutting blade of the debarking machine, the log is driven to move the auxiliary upper clamping wheel to the rear side by a small amplitude due to a large cutting resistance; at this time, the auxiliary upper clamping wheel drives the horizontal rod, the sliding block two and the sleeve rod two to move, so that the sleeve rod two moves to the inside of the sleeve two and pushes the hydraulic oil in the inside of the sleeve two to flow to the inside of the sleeve three through the pipeline one; the hydraulic oil in the sleeve three pushes the push rod one, the sliding block one, the transmission shaft and the main drive wheel to move, so that the main drive wheel moves to the direction of the auxiliary drive wheel; at the same time, the push rod one slides into the sleeve four and pushes the hydraulic oil in the sleeve four to flow into the sleeve one through the water hole, so that the plurality of auxiliary drive wheels arranged at equal intervals on the circumference are synchronously expanded outward, and the transmission belt loosened due to the movement of the main drive wheel is re-tensioned; in addition, the path surrounded by the plurality of expanded auxiliary drive wheels is lengthened, so that the main drive wheel drives the plurality of auxiliary drive wheels arranged on the circumference to move at a reduced speed, thereby reducing the log conveying speed of the conveying device, avoiding unstable phenomena such as vibration of the log caused by too fast conveying speed, and improving debarking precision and processing quality; in addition, part of the hydraulic oil in the sleeve four flows into the sleeve five through the pipeline two, so that the push rod two in the sleeve five drives the base, the disc, the sliding rod one and the auxiliary friction plate to move, so that the auxiliary friction plate and the main friction plate are more closely abutted, the slipping caused by excessive resistance is improved, and the stability of the log during debarking is ensured.

[0010] The chain type large log conveying device provided by the application has the following improvements and advantages compared with the prior art. Summary: The device detects the debarking operation state of the log by using a pure mechanical structure, and actively adjusts the transmission power of the driving motor to the conveying mechanism through the linkage structure when the log is detected to be in the debarking working condition: during the debarking operation stage, the conveying speed is reduced synchronously to adapt to the high resistance working condition, the stability of the processing operation is ensured, the output torque is increased to match the high resistance operation demand, and the normal advancement of the debarking operation is ensured; after the debarking operation is completed, the device automatically restores to the initial conveying speed, the conveying efficiency of the log to the debarking machine is improved, the torque is synchronously reduced, and damage to the clutch friction plate caused by long-term high load working condition is avoided. The device has fewer electrical components, lower failure rate during operation, and more controllable overall manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0011] The application will be further explained in combination with the drawings and embodiments: Figure 1 It is a perspective structural schematic diagram of the application; Figure 2This is a side view of the present invention; Figure 3 This is a schematic diagram of the auxiliary upper clamping wheel structure of the present invention; Figure 4 This is the present invention. Figure 3 Enlarged schematic diagram of part A; Figure 5 This is a schematic diagram of the drive rod structure of the present invention; Figure 6 This is the present invention. Figure 5 Enlarged schematic diagram of section B structure; Figure 7 This is a schematic diagram of the transmission belt structure of the present invention; Figure 8 This is the present invention. Figure 7 Enlarged schematic diagram of section C; Figure 9 This is the present invention. Figure 7 Enlarged schematic diagram of the D-section structure; Figure 10 This is the present invention. Figure 9 An enlarged schematic diagram of the E-section structure.

[0012] Explanation of reference numerals in the attached figures: 1. Base plate; 2. Drive motor; 3. Main friction disc; 4. Auxiliary friction disc; 5. Main drive wheel; 6. Transmission rod; 7. Gear 1; 8. Rotary disc; 9. Water hole; 10. Sleeve 1; 11. Sleeve rod 1; 12. Auxiliary drive wheel; 13. Transmission belt; 14. Base; 15. Disc; 16. Slide rod 1; 17. Spring 1; 18. Slide rod 2; 19. Frame; 20. Slider 1; 21. Drive shaft; 22. Universal joint; 23. 24. Main frame; 25. Linkage roller; 26. Chain; 27. Concave toothed plate; 28. Drive rod; 29. ​​Gear II; 30. Transmission chain; 31. Auxiliary frame; 32. Slider II; 33. Crossbar; 34. Auxiliary upper clamping wheel; 35. Sleeve II; 36. Spring II; 37. Sleeve II; 38. Pipe I; 39. Push rod I; 40. Sleeve IV; 41. Sleeve V; 42. Pipe II; 43. Push rod II. Detailed Implementation

[0013] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] This invention provides an improved chain-type large log conveying device. The technical solution of this invention is as follows: likeFigures 1-10 As shown, a chain type large log conveying device, including the base plate 1, the top of the base plate 1 is fixedly installed with the driving motor 2, the output end of the driving motor 2 is fixedly installed with the main friction disc 3, the top of the base plate 1 is provided with the auxiliary friction disc 4 matched with the main friction disc 3, the top of the base plate 1 is rotatably provided with the main drive wheel 5 and the transmission rod 6, the transmission rod 6 is fixedly installed with the gear one 7 and the rotating disc 8 at both ends respectively, a plurality of water holes 9 penetrating the center through hole are equally spaced and circumferentially provided on the outer ring surface of the rotating disc 8, a plurality of sleeve one 10 are equally spaced and circumferentially communicated on the outer ring surface of the rotating disc 8, and the plurality of sleeve one 10 are communicated with the corresponding water hole 9 respectively, the sleeve rod one 11 is slidably arranged in each sleeve one 10, the auxiliary drive wheel 12 is fixedly installed between every two adjacent sleeve rod one 11, the transmission belt 13 is wound between the main drive wheel 5 and the plurality of auxiliary drive wheels 12, the base plate 1 is slidably provided with the base 14 on the top, the disc 15 is rotatably connected on the base 14, the two slide rods one 16 are symmetrically and slidably arranged on the disc 15, and the two slide rods one 16 are fixedly connected with the side wall of the auxiliary friction disc 4, the spring one 17 is wound on the outer ring surface of each slide rod one 16, and the plurality of spring one 17 are connected between the disc 15 and the auxiliary friction disc 4, the slide rod two 18 is slidably arranged on the side wall of the auxiliary friction disc 4, in use, the driving motor 2 is arranged to drive the main friction disc 3 to rotate, the auxiliary friction disc 4 is tightly abutted with the main friction disc 3 under the elastic force of the spring one 17, so that the main friction disc 3 drives the auxiliary friction disc 4 to rotate synchronously.

[0015] Further, the top of the bottom plate 1 is fixedly installed with a frame 19, sliding blocks one 20 are slidingly arranged in the sliding channels on both sides of the frame 19, a transmission shaft 21 is rotatably connected between the two sliding blocks one 20, the main drive wheel 5 is fixedly sleeved on the transmission shaft 21, a universal joint 22 is arranged between the transmission shaft 21 and the sliding rod two 18, the auxiliary friction disc 4 arranged subsequently drives the sliding rod two 18, the universal joint 22, the transmission shaft 21 and the main drive wheel 5 to rotate, the main drive wheel 5 is arranged to drive the plurality of auxiliary drive wheels 12 to perform synchronous circular motion with the rotating disc 8 as the axis through the transmission belt 13; the top of the bottom plate 1 is fixedly installed with a main frame body 23, a plurality of linkage rollers 24 are rotatably connected on the main frame body 23, a chain 25 is wound between the plurality of linkage rollers 24, a plurality of concave toothed plates 26 are fixedly installed on the chain 25 at equal intervals, one end of one of the linkage rollers 24 is fixedly installed with a drive rod 27, one side end of the drive rod 27 away from the linkage roller 24 is fixedly installed with a gear two 28, the transmission chain 29 is wound between the gear one 7 and the gear two 28, the auxiliary drive wheels 12 performing synchronous circular motion drive the sleeve rod one 11, the sleeve one 10, the rotating disc 8, the transmission rod 6 and the gear one 7 to perform rotary motion, the gear one 7 arranged drives the gear two 28, the drive rod 27 and one of the linkage rollers 24 to rotate through the transmission chain 29; one of the linkage rollers 24 drives the plurality of linkage rollers 24 to rotate synchronously through the chain 25, so that the concave toothed plate 26 on the chain 25 drives the log to be debarked to move towards the debarking machine.

[0016] Further, the main frame body 23 is fixedly installed with an auxiliary frame body 30 between the side walls at both ends, sliding blocks two 31 are slidingly arranged in the sliding channels on both sides of the auxiliary frame body 30, a cross rod 32 is fixedly installed between the two sliding blocks two 31, an auxiliary upper clamping wheel 33 is fixedly sleeved on the rod body of the cross rod 32, a sleeve rod two 34 is welded on the side wall of each sliding block two 31, a spring two 35 is wound on the rod body of each sleeve rod two 34, a sleeve two 36 is fixedly installed on both sides of the auxiliary frame body 30, and the plurality of sleeve rod twos 34 are slidingly arranged in the corresponding sleeve twos 36, the auxiliary upper clamping wheel 33 arranged can assist the concave toothed plate 26 in the conveying operation of the log, so as to maintain the stability during the conveying of the log.

[0017] Furthermore, a sleeve 37 is fixedly installed on the side wall of the frame 19, and a pipe 38 connects the sleeve 37 and the sleeve 2 36. A push rod 39 is welded to one of the sliders 20. A sleeve 40 is rotatably connected to the end of the rotating disk 8, and the two ends of the push rod 39 slide in the sleeve 37 and the sleeve 40 respectively. A sleeve 5 41 is fixedly installed on the side wall of the frame 19, and a pipe 2 42 connects the sleeve 40 and the sleeve 5 41. A push rod 2 43 is fixedly installed on the side wall of the base 14, and the end of the push rod 2 43 away from the base 14 slides in the sleeve 5 41. When the log comes into contact with the cutting blade of the slitting machine, the log experiences significant cutting resistance, causing the auxiliary upper clamping wheel 33 to move slightly backward. At this time, the auxiliary upper clamping wheel 33 drives the crossbar 32, slider 2 31, and sleeve rod 2 34 to move, causing sleeve rod 2 34 to move into sleeve 2 36 and push the hydraulic oil inside sleeve 2 36 through pipe 1 38 into sleeve 37. The hydraulic oil entering sleeve 37 then pushes push rod 1 39, slider 1 20, drive shaft 21, and main drive wheel 5 to move, causing the main drive wheel 5 to move towards the auxiliary drive wheel 12. Simultaneously, push rod 39 slides into sleeve 40, pushing hydraulic oil inside sleeve 40 through water hole 9 into sleeve 10. This causes the circumferentially arranged auxiliary drive wheels 12 to expand outward synchronously, thereby re-tensioning the transmission belt 13, which had become loose due to the movement of the main drive wheel 5. Furthermore, the path formed by the expanded auxiliary drive wheels 12 is lengthened, causing the main drive wheel 5 to drive the circumferentially arranged auxiliary drive wheels 12 to decelerate. This reduces the log conveying speed of the conveying device, thus preventing instability such as vibration caused by excessively high conveying speed. This improves the precision and quality of the splitting process. It should be noted that due to the universal joint 22, even if the main drive wheel 5 moves, it will not affect the power transmission of the drive motor 2 to the main drive wheel 5. In addition, some of the hydraulic oil in the sleeve 40 enters the sleeve 5 41 through the pipe 2 42, which causes the push rod 2 43 in the sleeve 5 41 to push the base 14, disc 15, slide rod 16 and auxiliary friction disc 4 to move, so that the auxiliary friction disc 4 and the main friction disc 3 are in closer contact, improving the slippage caused by excessive resistance, and thus ensuring the stability of the log splitting process.

[0018] Working principle: During use, the drive motor 2 drives the main friction disk 3 to rotate. The auxiliary friction disk 4, under the elastic force of the spring 17, is in close contact with the main friction disk 3, causing the rotating main friction disk 3 to drive the auxiliary friction disk 4 to rotate synchronously. Subsequently, the auxiliary friction disk 4 drives the slide rod 18, universal joint 22, drive shaft 21, and main drive wheel 5 to rotate. The main drive wheel 5 drives several auxiliary drive wheels 12 to perform synchronous circular motion around the rotating disk 8 as the axis through the transmission belt 13. The auxiliary drive wheels 12 performing synchronous circular motion drive the sleeve rod 1... 11. Sleeve 10, rotary disk 8, transmission rod 6 and gear 7 rotate. Gear 7 drives gear 28, drive rod 27 and one of the linkage rollers 24 to rotate via transmission chain 29. One of the linkage rollers 24 drives several linkage rollers 24 to rotate synchronously via chain 25, thereby causing the concave toothed plate 26 on chain 25 to move the log to be split towards the splitting machine. The auxiliary upper clamping wheel 33 assists the concave toothed plate 26 in conveying the log, thereby maintaining the stability of the log during the conveying process. When the log comes into contact with the cutting blade of the slitting machine, the log experiences significant cutting resistance, causing the auxiliary upper clamping wheel 33 to move slightly backward. At this time, the auxiliary upper clamping wheel 33 drives the crossbar 32, slider 2 31, and sleeve rod 2 34 to move, causing sleeve rod 2 34 to move into sleeve 2 36 and push the hydraulic oil inside sleeve 2 36 through pipe 1 38 into sleeve 3 37. The hydraulic oil entering sleeve 3 37 then pushes push rod 1 39, slider 1 20, drive shaft 21, and main drive wheel 5 to move, causing the main drive wheel 5 to move towards the auxiliary drive wheel 12. Simultaneously, push rod 1 39 slides into sleeve 40 and pushes the hydraulic oil inside sleeve 40 to flow into sleeve 1 10 through water hole 9, causing the several auxiliary drive wheels 12, arranged in an evenly spaced circular pattern, to expand outward simultaneously. This, in turn, causes the transmission belt 13, which had loosened due to the movement of the main drive wheel 5, to be re-tensioned. Tight; In addition, the path formed by the expanded auxiliary drive wheels 12 is lengthened, causing the main drive wheel 5 to drive the circumferentially arranged auxiliary drive wheels 12 to decelerate, thereby reducing the log conveying speed of this conveying device, thus avoiding unstable phenomena such as vibration of the log due to excessively fast conveying speed, and improving the splitting accuracy and processing quality; It should be noted that due to the universal joint 22, even if the main drive wheel 5 moves, it will not affect the power transmission of the drive motor 2 to the main drive wheel 5; In addition, some of the hydraulic oil in the sleeve four 40 enters the sleeve five 41 through the pipe two 42, thereby causing the push rod two 43 in the sleeve five 41 to push the base 14, disc 15, slide rod one 16 and auxiliary friction disc 4 to move, so that the auxiliary friction disc 4 and the main friction disc 3 are in closer contact, improving the slippage caused by excessive resistance, and thus ensuring the stability of the log splitting; This device employs a purely mechanical structure to detect the log splitting operation status. When the log is detected to be in the splitting condition, the drive motor 2 can be actively adjusted to transmit power to the conveying mechanism via a linkage structure: during the splitting operation, the conveying speed is simultaneously reduced to adapt to the high-resistance condition, ensuring the stability of the processing operation, while the output torque is increased to match the high-resistance operation requirements, ensuring the normal progress of the splitting operation; after the splitting operation is completed, the device automatically returns to the initial conveying speed, improving the efficiency of the log conveying to the splitter, while simultaneously reducing the torque to prevent damage to the clutch friction disc due to prolonged high-load conditions. This device has fewer electrical components, resulting in a lower failure rate during operation, and the overall manufacturing cost is more controllable.

[0019] The foregoing description enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chain-type large log conveying device, comprising a base plate (1), characterized in that: A drive motor (2) is fixedly installed on the top of the base plate (1). A main friction disc (3) is fixedly installed at the output end of the drive motor (2). An auxiliary friction disc (4) that cooperates with the main friction disc (3) is provided on the top of the base plate (1). A main drive wheel (5) and a transmission rod (6) are rotatably provided on the top of the base plate (1). A gear (7) and a rotating disc (8) are fixedly installed at both ends of the transmission rod (6). A number of water holes (9) that are connected to the central through hole are opened on the outer ring surface of the rotating disc (8) at equal intervals. A number of sleeves (10) are connected on the outer ring surface of the rotating disc (8) at equal intervals. The sleeves (10) are connected to the corresponding water holes (9). A sleeve rod (11) is slidably provided in each sleeve (10). An auxiliary drive wheel (12) is fixedly installed between each two adjacent sleeve rods (11). A transmission belt (13) is wound between the main drive wheel (5) and the auxiliary drive wheels (12).

2. The chain-type large log conveying device according to claim 1, characterized in that: A base (14) is slidably disposed on the top of the base plate (1). A disc (15) is rotatably connected to the base (14). Two symmetrical sliding rods (16) are slidably disposed on the disc (15). Both sliding rods (16) are fixedly connected to the side wall of the auxiliary friction disc (4). A spring (17) is wound around the outer ring surface of each sliding rod (16). Several springs (17) are connected between the disc (15) and the auxiliary friction disc (4). A sliding rod (18) is slidably disposed on the side wall of the auxiliary friction disc (4).

3. A chain-type large log conveying device according to claim 2, characterized in that: A frame (19) is fixedly installed on the top of the base plate (1). A slider (20) is slidably arranged in the slide rails on both sides of the frame (19). A drive shaft (21) is rotatably connected between the two sliders (20). The main drive wheel (5) is fixedly sleeved on the drive shaft (21). A universal joint (22) is provided between the drive shaft (21) and the slide rod (18).

4. A chain-type large log conveying device according to claim 1, characterized in that: The base plate (1) is fixedly mounted on the top of the main frame (23), and a number of linkage rollers (24) are rotatably connected to the main frame (23). A chain (25) is wound between the linkage rollers (24). A number of concave toothed plates (26) are fixedly mounted on the chain (25) at equal intervals. A drive rod (27) is fixedly mounted at the end of one of the linkage rollers (24). A gear two (28) is fixedly mounted at the end of the drive rod (27) away from the linkage roller (24). A transmission chain (29) is wound between the gear one (7) and the gear two (28).

5. A chain-type large log conveying device according to claim 4, characterized in that: A secondary frame (30) is fixedly installed between the two side walls of the main frame (23). A slider (31) is slidably installed in the slide rails on both sides of the secondary frame (30). A crossbar (32) is fixedly installed between the two sliders (31). An auxiliary upper clamping wheel (33) is fixedly sleeved on the crossbar (32). A sleeve rod (34) is welded on the side wall of each slider (31). A spring (35) is wound around the rod of each sleeve rod (34). A sleeve (36) is fixedly installed on both sides of the secondary frame (30), and several sleeve rods (34) are slidably installed inside the corresponding sleeve (36).

6. A chain-type large log conveying device according to claim 3, characterized in that: A sleeve three (37) is fixedly installed on the side wall of the frame (19). A pipe one (38) is connected between the sleeve three (37) and the sleeve two (36). A push rod one (39) is welded on one of the sliders one (20). A sleeve four (40) is rotatably connected to the end of the rotating disk (8). The two ends of the push rod one (39) slide in the sleeve three (37) and the sleeve four (40) respectively.

7. A chain-type large log conveying device according to claim 6, characterized in that: A sleeve five (41) is fixedly installed on the side wall of the frame (19), and a pipe two (42) is connected between the sleeve four (40) and the sleeve five (41). A push rod two (43) is fixedly installed on the side wall of the base (14), and the end of the push rod two (43) away from the base (14) is slidably disposed in the sleeve five (41).

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