Clamping conveying wheel pair and conveying device for conveying bars

Abstract

The utility model discloses a clamping conveying wheel pair and a conveying device for conveying bars, and belongs to the technical field of air valve machining equipment. The wheel pair comprises a driving wheel and a pressing wheel, the driving wheel comprises a rotating shaft arranged in the left-right direction and a roller, a pressing disc and a fixing cover which are sequentially arranged on the rotating shaft, the roller, the pressing disc and the fixing cover are all coaxially arranged with the rotating shaft, the roller is rotationally arranged on the rotating shaft, the side, close to the pressing disc, of the roller is a rough surface, and the fixing cover is fixed to the rotating shaft; the pressing disc can only move in the direction of the rotating shaft, a friction disc is coaxially fixed to the side, close to the rolling wheel, of the pressing disc, and a plurality of springs are arranged between the side, away from the rolling wheel, of the pressing disc and the fixing cover so that the friction disc can abut against the rough face of the rolling wheel. The plurality of springs are uniformly distributed around the rotating shaft and are arranged in the left-right direction; when the bars are conveyed, the rotating shaft drives the roller to rotate through the friction disc; when the bars cannot be conveyed backwards, the friction force between the rollers and the bars is increased, so that the friction discs slip relative to the rollers, and the rotating shafts cannot drive the rollers to rotate.

Description

Technical Field

[0001] This utility model belongs to the technical field of valve processing equipment, and specifically relates to a clamping and conveying wheel pair and conveying device for conveying bar stock. Background Technology

[0002] The function of engine valves is specifically to input air into the engine and expel exhaust gases after combustion. Valves are typically machined from bar stock. The actual machining process is as follows: After the steel bar is straightened, it is cut into valve blanks (specifically, long bars, such as those longer than 2 meters). The circumference of the long bars is then ground using a centerless grinder. After passing inspection (such as flaw detection), they are slit into short bars of suitable length, which are then used to manufacture valves. A bar stock conveying device is required during the slitting process to output the bars to the slitting device.

[0003] For example, application number CN201810676435.6 discloses a bar shearing device, including a single bar feeding mechanism, a measuring and clamping feeding mechanism, a clamping and shearing mechanism, and a discharge mechanism arranged sequentially on the same straight line. The clamping and shearing mechanism includes a moving blade, a stationary blade, a first clamping device, and a second clamping device. The moving blade is fixed on a blade holder, which is fixed to the punch press body via a connecting plate. A sensor is installed on the discharge mechanism. The first clamping device includes a clamping cylinder, an L-shaped support block, a connecting rod, and a rocker arm connected sequentially. The clamping cylinder is fixed above a cylinder mounting base and connected to a control... The L-shaped support block's horizontal and vertical arms are hinged to the cylinder mounting base at their intersection. The end of the L-shaped support block's vertical arm is hinged to the piston rod of the clamping cylinder. The two ends of the connecting rod are connected to the end of the L-shaped support block's horizontal arm and one end of the rocker arm, respectively, with the two ends of the connecting rod located on opposite sides of the L-shaped support block's vertical arm. The other end of the rocker arm is hinged to the cylinder mounting base. A pressure block is located in the middle of the rocker arm, and a pad is located at a corresponding position on the cylinder mounting base. When the clamping cylinder retracts, the intersection of the L-shaped support block's horizontal and vertical arms aligns with the connecting rod, forming a self-locking structure. The pressure block is close to the pad. The clamping device includes a clamping cylinder, a cylindrical connecting block, a sliding rod, and a top block. Two sliding rods are arranged in parallel, passing through the cylinder mounting base and sliding within it. The cylindrical connecting block is fixed to one end of the sliding rod, and a spring is installed between the cylindrical connecting block and the cylinder mounting base. The top block and the cylindrical connecting block are located on corresponding side surfaces of the cylinder mounting base. A spherical recess is provided on the side of the cylindrical connecting block away from the cylinder mounting base. The piston rod end of the clamping cylinder is provided with a spherical connector that mates with the spherical recess. The clamping cylinder presses against the cylindrical connecting block through the spherical connector and the spherical recess. Above; a mounting base is provided at the other end of the slide rod that passes through the cylinder fixing seat. A top block is provided in the middle of the mounting base. The working surfaces of the top block and the pad block are parallel, and a stationary blade is fixed between them. The stationary blade is fixed to the cylinder fixing seat by a connecting plate. During shearing, the top block corresponds to the moving blade. When the moving blade shears forward, it will push the clamping cylinder to retract through the top block. The clamping cylinder, the clamping cylinder, and the punch are all connected to the controller. During shearing, the first clamping device and the second clamping device clamp the bar. The moving blade and the stationary blade form a "scissor" shape to shear the bar between the first clamping device and the second clamping device.The measuring and clamping feeding mechanism includes a measuring device, a clamping device, and a guiding device. The measuring device includes an encoder and a first roller that cooperates with the encoder. The bar stock moves forward between the encoder and the first roller. The clamping device includes a pressure wheel and a second roller that cooperates with the pressure wheel. The pressure wheel is fixed to the end of the horizontal shaft of the "L"-shaped pressure arm. A cross block is fixed above the pressure arm. The end of the vertical shaft of the pressure arm abuts against one end of the horizontal shaft of the cross block. A vertical spring screw is fixed to the other end of the horizontal shaft of the cross block. A spring is installed at the lower end of the spring screw, and the spring abuts against the horizontal shaft of the pressure arm. The guiding device includes a first guide. The device includes a measuring device and a second guiding device. The first guiding device is a cylinder that matches the bar and is located between the measuring device and the clamping device. The second guiding device includes a V-groove and a pressure plate arranged axially along the V-groove. A screw is arranged above the pressure plate to adjust the gap between the pressure plate and the V-groove. The bar material conveyed by the feeding mechanism passes through the measuring device, the first guiding device, the clamping device, and the second guiding device in sequence and enters the clamping and shearing mechanism for fixed-length shearing. The first roller and the second roller are driven by the same motor to move the bar material forward. The motor and the encoder are both connected to the controller.

[0004] In the prior art, the drive wheel and the pressure wheel constitute a wheel for conveying bar stock; the structure of the wheel pair can also be found in patent application number CN202420378112.X, which discloses a bar stock conveying structure, including a frame and N rollers arranged side by side on it, the rollers being arranged in a left-right direction; the conveying structure also includes a metal detector, a wheel-type meter counter, a support on the frame, two pressure rollers and a cylinder for driving the pressure rollers up and down, the two pressure rollers being located directly above two adjacent rollers, and the cylinder being mounted on the support. The pressure roller is arranged on the frame in a left-right direction, directly above the bar stock. It can be driven by a cylinder to move downwards to the upper side of the bar stock. The metal detector and the wheel-type meter counter are both mounted on the bracket, arranged sequentially from front to back, between the two pressure rollers, and flush with the rollers. They are used to detect whether the bar stock has passed and to measure the length of the bar stock, respectively. When the metal detector is triggered, the front pressure roller moves downwards, and the rear pressure roller moves downwards simultaneously or with a delay so that it is positioned adjacent to the top of the bar stock when the rear end of the bar stock reaches the rear pressure roller.

[0005] During slitting, the bar stock is clamped and slit, at which point the stock stops. If the wheelset continues to rotate at this point, it will not only scratch the bar stock (friction increases when stopped), but also cause wear on the drive wheel itself. If the wheelset is stopped, the drive wheel will frequently start and stop, which will not only affect the lifespan of the motor, but also the processing speed (starting and stopping both take time, and the initial speed is slower). Summary of the Invention

[0006] To address the aforementioned problems, this utility model provides a clamping and conveying wheel pair and a conveying device for conveying bar stock. When the bar stock stops being conveyed, the drive wheel stops rotating (while the drive motor continues to operate normally), thus avoiding rotational friction between the bar stock and the drive wheel when the bar stock stops, and also ensuring processing speed. The technical solution is as follows:

[0007] On one hand, this utility model embodiment provides a clamping conveyor wheel pair for conveying bar stock, including a drive wheel 2 and a pressure wheel 3 arranged side by side, both the drive wheel 2 and the pressure wheel 3 are arranged in a left-right direction and have V-shaped grooves on their circumferences that mate with the bar stock 1; the drive wheel 2 includes a rotating shaft 4 arranged in a left-right direction and a roller 5, a pressure plate 7 and a fixing cover 9 arranged sequentially on it, the roller 5, the pressure plate 7 and the fixing cover 9 are all coaxially arranged with the rotating shaft 4, the roller 5 is rotatably mounted on the rotating shaft 4 and its side near the pressure plate 7 is roughened, the fixing cover 9 is fixed to the rotating shaft 4; the pressure plate 7 It can only move along the direction of the rotating shaft 4 and cannot rotate relative to the rotating shaft 4. A friction disc 6 is coaxially fixed on the side of it near the roller 5. Multiple springs 8 are provided between the side of it away from the roller 5 and the fixed cover 9 to press the friction disc 6 against the rough surface of the roller 5. The multiple springs 8 are evenly distributed around the rotating shaft 4 and are all arranged in the left and right direction. When the bar stock 1 is being conveyed, the rotating shaft 4 drives the roller 5 to rotate through the friction disc 6. When the bar stock 1 cannot be conveyed backward, the friction between the roller 5 and the bar stock 1 increases, causing the friction disc 6 to slip relative to the roller 5, and thus the rotating shaft 4 cannot drive the roller 5 to rotate.

[0008] In this embodiment of the invention, the rotating shaft 4 has a convex ring 10 coaxially arranged in the middle, with a drive wheel 11 coaxially arranged at one end and a flat end 12 at the other end. A bushing 13 is coaxially arranged on the flat end 12 between the convex ring 10 and the drive wheel 11. The roller 5 is rotatably mounted on the rotating shaft 4 via a bearing 14. A bearing cover 15 is coaxially fixed on the side of the roller 5 near the pressure plate 7. An inner retaining ring 16 is coaxially arranged at the end of the inner retaining ring 16 away from the pressure plate 7. The inner diameter of the inner retaining ring 16 is larger than the diameter of the convex ring 10. The side of the inner retaining ring 16 near the pressure plate 7 is the same as the side of the inner retaining ring 10 near the pressure plate 7. The bearing 14 is located between the roller 5 and the shaft 4, with one side abutting against the convex ring 10 and the inner retaining ring 16. The bearing cover 15 abuts against the other side of the bearing 14, locking the bearing 14 in place on the center hole of the roller 5. The side of the bearing cover 15 near the pressure plate 7 is rough. The friction disc 6 abuts against the rough surface of the bearing cover 15 on the side near the roller 5. The two opposite sides of the flat end 12 are flattened to make its cross-section drum-shaped. The pressure plate 7 and the fixing cover 9 are both located on the flat end 12. The center hole of the pressure plate 7 is a drum-shaped hole that mates with the flat end 12.

[0009] Specifically, in this embodiment of the present invention, the friction disc 6, pressure disc 7, fixing cover 9 and bearing cover 15 are all circular rings coaxially arranged with the rotating shaft 4. The inner diameter of the friction disc 6 and the bearing cover 15 is larger than the diameter of the rotating shaft 4. The pressure disc 7 is clearance-fitted with the flat end 12 and has a circular groove coaxially provided on the side near the roller 5 for installing the friction disc 6.

[0010] Furthermore, in this embodiment of the present invention, the fixing cover 9 is provided with a plurality of spring mounting grooves 91 for mounting springs 8 on the side near the roller 5. The spring mounting grooves 91 are arranged in the left and right direction and are round holes that cooperate with springs 8; one end of spring 8 is located in the spring mounting groove 91.

[0011] Preferably, in this embodiment of the present invention, the fixing cover 9 is flexibly mounted on the flat end 12 and threadedly connected to the flat end 12. N sets of locking pairs are provided on the side of the cover away from the pressure plate 7. Each locking pair includes two pin holes 92 symmetrically arranged around the rotating shaft 4. The 2N pin holes 92 are evenly distributed around the rotating shaft 4 and are located on the same circle concentric with the rotating shaft 4. The clamping conveyor wheel pair also includes a locking component 17, which includes a locking plate 71, locking bolts 72, and two pins 73 fixedly connected to both ends of the locking plate 71. The locking plate 71 is arranged radially along the rotating shaft 4, and its side near the flat end 12 is arranged along its... A convex key 74 is provided in the direction of the plate, with a through hole 75 at its midpoint for the locking bolt 72 to pass through; a threaded hole coaxially provided at the center of the flat end 12 to mate with the locking bolt 72, and a keyway 18 provided thereto to mate with the convex key 74; the convex key 74 is embedded in the keyway 18; the locking bolt 72 and the pin 73 are located on the side of the locking plate 71 near the rotating shaft 4, and are both arranged in the left-right direction; the locking bolt 72 is threadedly connected to the locking threaded hole, which locks and fixes the locking plate 71 on the flat end 12; the two pins 73 are symmetrically arranged with respect to the locking bolt 72, and are respectively inserted into the two pin holes 92 of a set of locking pairs.

[0012] Specifically, in this embodiment of the present invention, there are 3 springs 8, and the included angle between two adjacent springs 8 is 120°; there are 6 pin holes 92, and the included angle between two adjacent pin holes 92 is 60°; the springs 8 and the pin holes 92 are arranged alternately.

[0013] On the other hand, this utility model embodiment also provides a conveying device for conveying bar stock. The device includes a frame 21, a drive structure 22, two lifting plates 23, and the aforementioned M clamping conveying wheel pairs 24. The two lifting plates 23 are respectively located on the upper and lower parts of the frame 21, and can move synchronously towards or away from each other. The M clamping conveying wheel pairs 24 are arranged side by side, with their drive wheels 2 and clamping wheels 3 respectively located on the two lifting plates 23. The drive structure 22 is used to synchronously drive the M drive wheels 2, and it is located on the same lifting plate 23 as the drive wheels 2.

[0014] Furthermore, the device also includes M-1 guide tubes 25 through which the bar stock 1 passes, and M-1 guide tubes 25 and M clamping conveyor wheel pairs 24 are arranged alternately; the guide tubes 25 are arranged in the front-back direction, coaxially located outside the bar stock 1, fixed on the frame 21, and located between two lifting plates 23.

[0015] Specifically, in this embodiment of the present invention, there are two clamping and conveying wheel pairs 24 and one conduit 25.

[0016] Furthermore, the device also includes a rack and pinion synchronization structure 28, a cylinder 27, a wheeled meter counter 29, a support wheel 30, and two slide rails 26; in this embodiment, M drive wheels 2 are arranged side-by-side on the upper lifting plate 23, and M pressing wheels 3 are arranged side-by-side on the lower lifting plate 23; the two slide rails 26 are arranged side-by-side on the frame 21, both vertically oriented; the front and rear ends of the lifting plate 23 are slidably mounted on the two slide rails 26; the cylinder 27 is vertically oriented and positioned between the lower lifting plate 23 and the frame 21. Located between two slide rails 26, it is used to drive the lower lifting plate 23 to slide up and down; the rack and pinion synchronization structure 28 is located between the two lifting plates 23, on the side of the lifting plate 23 away from the clamping conveyor wheel pair 24, and is used to make the two lifting plates 23 move towards each other or away from each other synchronously; the wheel-type meter counter 29 and the support wheel 30 are located on the upper and lower sides of the bar stock 1 respectively, and are respectively set on the upper lifting plate 23 and the lower lifting plate 23. The support wheel 30 is arranged in the left and right direction, and the wheel-type meter counter 29 is located directly above the support wheel 30.

[0017] The beneficial effects of the technical solution provided by this utility model embodiment are as follows: This utility model embodiment provides a clamping conveyor wheel pair and conveying device for conveying bar stock. When the bar stock stops conveying, the drive wheel stops rotating (while the drive motor works normally), avoiding rotational friction between the bar stock and the drive wheel when the bar stock stops, and also ensuring the processing speed. In addition, the structure of this patent makes it easy to replace the friction disc. The friction force between the friction disc and the bearing cover can also be adjusted by adjusting the fixing cover. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the conveying device for conveying bar stock in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive wheel;

[0020] Figure 3 This is a side view of the drive wheel;

[0021] Figure 4 yes Figure 3Sectional view along axis AA;

[0022] Figure 5 This is a schematic diagram of the rotating shaft;

[0023] Figure 6 This is a structural diagram of the fixed cover;

[0024] Figure 7 This is a structural diagram of the locking component;

[0025] Figure 8 This is a schematic diagram of the rack and pinion synchronization structure;

[0026] Figure 9 This is a schematic diagram of the driving structure.

[0027] In the diagram: 1 bar stock, 2 drive wheel, 3 clamping wheel, 4 rotating shaft, 5 roller, 6 friction disc, 7 pressure plate, 8 spring, 9 fixed cover, 10 convex ring, 11 drive wheel, 12 flat end, 13 bushing, 14 bearing, 15 bearing cover, 16 inner retaining ring, 17 locking element, 18 keyway;

[0028] 21 Frame, 22 Drive structure, 23 Lifting plate, 24 Clamping conveyor wheel pair, 25 Conduit, 26 Slide rail, 27 Cylinder, 28 Rack and pinion synchronization structure, 29 Wheeled meter counter, 30 Support wheel;

[0029] 71 Locking plate, 72 Locking bolt, 73 Pin, 74 Raised key, 75 Through hole;

[0030] 91 Spring mounting slot, 92 Pin hole. Detailed Implementation

[0031] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] See Figure 1-6 Example 1 provides a clamping conveyor wheel pair for conveying bar stock, including a drive wheel 2 and a clamping wheel 3 arranged side by side. Both the drive wheel 2 and the clamping wheel 3 are arranged in the left-right direction, and their circumferential surfaces are provided with V-shaped grooves that cooperate with the bar stock 1, which are located on the upper and lower sides of the bar stock 1 respectively.

[0034] The drive wheel 2 includes a rotating shaft 4 and rollers 5, pressure plate 7, fixing cover 9, and bearing cover 15 arranged sequentially on it. The rotating shaft 4 is arranged in a left-right direction, with a convex ring 10 coaxially arranged in its middle. One end (left or right end) is coaxially arranged with a drive wheel 11 (specifically a sprocket, which is connected to the drive structure 22 for transmission), and the other end is a flat end 12. A bushing 13 is coaxially arranged on the flat end 12 between the convex ring 10 and the drive wheel 11. The bushing 13 is located on the lifting plate 23. The two opposite sides of the flat end 12 are flattened to make its cross-section drum-shaped. The friction plate 6, pressure plate 7, fixing cover 9, and bearing cover 15 are all circular rings coaxially arranged with the rotating shaft 4. The inner diameter of the friction plate 6 and the bearing cover 15 is larger than the diameter of the rotating shaft 4. Roller 5 is coaxially mounted on shaft 4 and rotatably mounted on shaft 4 via bearing 14. A bearing cover 15 is coaxially fixed to the side of roller 5 closest to pressure plate 7. An inner retaining ring 16 is coaxially mounted at the end of roller 5 away from pressure plate 7, with a V-groove on its circumference to mate with bar stock 1. The inner diameter of the inner retaining ring 16 is larger than the diameter of the convex ring 10, and its side (left or right) closest to pressure plate 7 is flush with the side of the convex ring 10 closest to pressure plate 7. Bearing 14 is positioned between roller 5 and shaft 4, with one side abutting against the convex ring 10 and inner retaining ring 16. Bearing cover 15 abuts against the other side of bearing 14, locking bearing 14 in place on the center hole of roller 5; its side closest to pressure plate 7 has a rough surface. A fixing cover 9 is fixed to the end of flat end 12. The pressure plate 7 can only move along the direction of the rotating shaft 4. It is slidably mounted on the flat end 12 and cannot rotate relative to the rotating shaft 4. A friction disc 6 is coaxially fixed on the side of the pressure plate 7 near the roller 5. Multiple springs 8 are provided between the side of the pressure plate 7 away from the roller 5 and the fixed cover 9 to press the friction disc 6 against the rough surface of the roller 5. The central hole of the friction disc 6 is a drum-shaped hole that mates with the flat end 12, and it is clearance-fitted with the flat end 12. A circular groove for mounting the friction disc 6 is coaxially provided on the side of the pressure plate 7 near the roller 5. The side of the friction disc 6 near the roller 5 rests against the rough surface of the bearing cover 15. Multiple (2-6) springs 8 are evenly distributed around the rotating shaft 4 and are all arranged in the left-right direction.

[0035] When bar stock 1 is being conveyed, the friction between roller 5 and bar stock 1 is relatively small, and the rotating shaft 4 drives roller 5 to rotate through friction disc 6. When bar stock 1 cannot be conveyed backward, the friction between roller 5 and bar stock 1 increases, causing friction disc 6 to slip relative to roller 5, and thus the rotating shaft 4 cannot drive roller 5 to rotate.

[0036] Further, see Figure 4 and 6 In this embodiment of the invention, the fixing cover 9 is provided with a plurality of spring mounting grooves 91 (the number of which is the same as the number of springs 8) on the side near the roller 5. The spring mounting grooves 91 are arranged in the left-right direction and are round holes that mate with the springs 8. One end of the spring 8 (the end away from the pressure plate 7) is located in the spring mounting groove 91.

[0037] Example 2

[0038] See Figure 1-7 Example 2 provides a clamping conveyor wheel pair for conveying bar stock, which has a structure that is basically the same as that of Example 1, except that the clamping conveyor wheel pair for conveying bar stock in this example also includes a locking element 17.

[0039] In this embodiment, the fixed cover 9 is flexibly mounted on the flat end 12 and is threadedly connected to the flat end 12. On the side of the fixed cover 9 away from the pressure plate 7, there are N (N is an integer from 2 to 4) sets of locking pairs. Each set of locking pairs includes two pin holes 92 symmetrically arranged around the rotating shaft 4; the 2N pin holes 92 are evenly distributed around the rotating shaft 4 and are located on the same circle concentric with the rotating shaft 4.

[0040] The locking component 17 includes a locking plate 71, a locking bolt 72, and two pins 73. The locking plate 71 is radially positioned along the shaft 4, located at the end face of the flat end 12. A key 74 is provided on the side of the plate near the flat end 12, with a through hole 75 (specifically a circular hole, arranged in the left-right direction) at its midpoint for the locking bolt 72 to pass through. A threaded hole coaxially located at the center of the flat end 12, mates with the locking bolt 72, and has a keyway 18 (radially positioned along the shaft 4) that mates with the key 74. The key 74 is embedded in the keyway 18. The locking bolt 72 and pins 73 are located on the side of the locking plate 71 near the shaft 4, both arranged in the left-right direction. The locking bolt 72 is threaded into the locking threaded hole, securing the locking plate 71 to the flat end 12. Two pins 73 are fixed at both ends of the locking plate 71, and are symmetrically arranged with locking bolts 72. They are inserted into the two pin holes 92 of a set of locking pairs.

[0041] The process of adjusting the fixing cover 9 is as follows: loosen the locking bolt 72, remove the locking part 17, rotate the fixing cover 9 (e.g., 60°, 90°, etc.), then install the locking part 17, and finally lock the locking part 17 with the locking bolt 72.

[0042] Example 3

[0043] See Figure 6 Example 3 provides a clamping conveyor wheel pair for conveying bar stock. Its structure is basically the same as that of Example 2, except that: in this example, there are 3 springs 8, and the included angle between two adjacent springs 8 is 120°. There are 6 pin holes 92, and the included angle between two adjacent pin holes 92 is 60°. The springs 8 and pin holes 92 are arranged alternately.

[0044] Example 4

[0045] See Figure 2Example 4 provides a clamping conveyor wheel pair for conveying bar stock. Its structure is basically the same as that of Example 2, except that: in this example, the drive wheel 11 is located at the left end of the rotating shaft 4, the bushing 13 is located on the left side of the rotating shaft 4, and the roller 5, pressure plate 7, fixing cover 9, and bearing cover 15 are located on the right side of the rotating shaft 4, arranged sequentially from left to right. The fixing cover 9 is located at the right end of the rotating shaft 4. The friction disc 6 is located on the left side of the pressure plate 7, the spring mounting groove 91 is located on the left side of the fixing cover 9, and the bearing cover 15 is located on the right side of the roller 5, with its right side having a rough surface. The locking bolt 72 and two pins 73 are located on the left side of the locking plate 71.

[0046] Example 5

[0047] See Figure 1 , 8 Example 5 provides a conveying device for conveying bar stock. This device includes a frame 21, a drive structure 22, two lifting plates 23, and M (an integer from 1 to 4) clamping conveyor wheel pairs 24 as described in any one of Examples 1-4. The two lifting plates 23 are respectively located at the upper and lower parts of the frame 21, and can move synchronously towards or away from each other. They are arranged in the front-to-back direction and slidably mounted on the frame 21. The M clamping conveyor wheel pairs 24 are arranged side-by-side, with their drive wheels 2 (mounted on the lifting plates 23 via bushings 13) and clamping wheels 3 respectively mounted on the two lifting plates 23. The drive structure 22 is used to synchronously drive (specifically via a chain, the chain being wound around the drive wheels 11 of the M drive wheels 2) the M drive wheels 2, and the drive wheels 2 are located on the same lifting plate 23.

[0048] Example 6

[0049] See Figure 1 Example 6 provides a conveying device for conveying bar stock, which has a structure that is basically the same as that of Example 5, except that the device in this example also includes M-1 guide tubes 25 through which the bar stock 1 passes, and the M-1 guide tubes 25 and M clamping conveying wheel pairs 24 are arranged alternately. The guide tubes 25 are arranged in the front-back direction, coaxially outside the bar stock 1, fixed on the frame 21, and located between two lifting plates 23. They are circular tubes larger than the bar stock 1 and are located between the drive wheel 2 and the clamping wheel 3.

[0050] Example 7

[0051] See Figure 1 , 8 Example 7 provides a conveying device for conveying bar stock, which has a structure that is basically the same as that of Example 5, except that: in this example, M drive wheels 2 are arranged side by side on the upper lifting plate 23, and M pressing wheels 3 are arranged side by side on the lower lifting plate 23.

[0052] Example 8

[0053] See Figure 1 , 8 Example 8 provides a conveying device for conveying bar stock, which has a structure basically the same as that of Example 5, except that the conveying device for conveying bar stock in this example also includes a rack and pinion synchronization structure 28, a cylinder 27, a wheeled meter counter 29, a support wheel 30, and two slide rails 26. The two slide rails 26 are arranged side-by-side on the frame 21, both vertically oriented. The front and rear ends of the lifting plate 23 are slidably mounted on the two slide rails 26. The upper lifting plate 23 is slidably mounted on the upper part of the slide rail 26, and the lower lifting plate 23 is slidably mounted on the lower part of the slide rail 26. The cylinder 27 is vertically oriented, positioned between the lower lifting plate 23 and the frame 21, between the two slide rails 26, and is used to drive the lower lifting plate 23 to slide up and down. A rack and pinion synchronization structure 28 is located between two lifting plates 23, on the side of the lifting plates 23 away from the clamping conveyor wheelset 24. It is used to allow the two lifting plates 23 to move synchronously towards or away from each other. It includes a synchronization gear (located on the frame 21 along the left-right direction, on the left or right side of the two lifting plates 23) and two synchronization racks (vertically arranged, located on the front and rear sides of the synchronization gear, respectively, on the two lifting plates 23). A wheel-type meter counter 29 and a support wheel 30 are located on the upper and lower sides of the bar stock 1, respectively, on the upper and lower lifting plates 23. The support wheel 30 is arranged along the left-right direction, and the wheel-type meter counter 29 is located directly above the support wheel 30.

[0054] Example 9

[0055] See Figure 1 , 8 Example 9 provides a conveying device for conveying bar stock, which has a structure that is basically the same as that of Example 5, except that: in this example, there are two clamping conveying wheel pairs 24, one guide tube 25 located between the two clamping conveying wheel pairs 24, and the chain is in the shape of an isosceles triangle.

[0056] Example 10

[0057] See Figure 1 Example 10 provides a conveying device for conveying bar stock, which has a structure that is basically the same as that of Example 8, except that: in this example, the conveying device for conveying bar stock is located upstream of the slitting device, and the wheel meter counter 29 and the support wheel 30 are located at the front or rear end of the lifting plate 23 and are located at one end close to the slitting device.

[0058] Example 11

[0059] Example 11 provides a conveying device for conveying bar stock, which may also consist of only one lifting plate 23. The drive wheel 2 is mounted on the frame 21, and the clamping wheel 3 is mounted on the lifting plate 23 and is located directly above the drive wheel 2.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping conveyor wheel pair for conveying bar stock, comprising a drive wheel (2) and a clamping wheel (3) arranged side by side, wherein both the drive wheel (2) and the clamping wheel (3) are arranged in a left-right direction and have V-shaped grooves on their circumferences that mate with the bar stock (1); characterized in that, The drive wheel (2) includes a rotating shaft (4) arranged in a left-right direction and a roller (5), a pressure plate (7), and a fixed cover (9) arranged sequentially on it. The roller (5), pressure plate (7), and fixed cover (9) are all coaxially arranged with the rotating shaft (4). The roller (5) is rotatably mounted on the rotating shaft (4), and its side near the pressure plate (7) is rough. The fixed cover (9) is fixed on the rotating shaft (4). The pressure plate (7) can only move in the direction of the rotating shaft (4) and cannot rotate relative to the rotating shaft (4). A friction disc is coaxially fixed on its side near the roller (5). 6) Multiple springs (8) are provided between the side away from the roller (5) and the fixed cover (9) to press the friction disc (6) against the rough surface of the roller (5); the multiple springs (8) are evenly distributed around the rotating shaft (4) and are all arranged in the left and right direction; when the bar stock (1) is being conveyed, the rotating shaft (4) drives the roller (5) to rotate through the friction disc (6); when the bar stock (1) cannot be conveyed backward, the friction between the roller (5) and the bar stock (1) increases, causing the friction disc (6) to slip relative to the roller (5), and thus the rotating shaft (4) cannot drive the roller (5) to rotate.

2. The clamping conveyor wheel pair for conveying bar stock according to claim 1, characterized in that, The rotating shaft (4) has a convex ring (10) coaxially arranged in the middle, with a drive wheel (11) coaxially arranged at one end and a flat end (12) at the other end. A bushing (13) is coaxially arranged on the convex ring (10) and between the drive wheel (11). The roller (5) is rotatably mounted on the rotating shaft (4) via a bearing (14). A bearing cover (15) is coaxially fixed on the side of the roller (5) near the pressure plate (7). An inner retaining ring (16) is coaxially arranged at the end of the roller (5) away from the pressure plate (7). The inner diameter of the inner retaining ring (16) is larger than the diameter of the convex ring (10), and the side of the inner retaining ring (16) near the pressure plate (7) is flush with the side of the inner retaining ring (10) near the pressure plate (7). The bearing (14) is located between the roller (5) and the shaft (4), with one side abutting against the convex ring (10) and the inner retaining ring (16); the bearing cover (15) abuts against the other side of the bearing (14), which locks the bearing (14) in place on the center hole of the roller (5), and the side of the bearing close to the pressure plate (7) is rough; the friction disc (6) abuts against the rough surface of the bearing cover (15) on the side close to the roller (5), and the two opposite sides of the flat end (12) are flattened to make its cross-section drum-shaped. The pressure plate (7) and the fixing cover (9) are both located on the flat end (12), and the center hole of the pressure plate (7) is a drum-shaped hole that mates with the flat end (12).

3. The clamping conveyor wheel pair for conveying bar stock according to claim 2, characterized in that, The friction disc (6), pressure plate (7), fixing cover (9) and bearing cover (15) are all circular rings coaxially arranged with the rotating shaft (4). The inner diameter of the friction disc (6) and bearing cover (15) is larger than the diameter of the rotating shaft (4). The pressure plate (7) is clearance-fitted with the flat end (12) and has a circular groove coaxially arranged on the side near the roller (5) for installing the friction disc (6).

4. The clamping conveyor wheel pair for conveying bar stock according to claim 2, characterized in that, The fixed cover (9) is provided with a plurality of spring mounting slots (91) for mounting springs (8) on the side near the roller (5). The spring mounting slots (91) are arranged in the left and right direction and are round holes that cooperate with the springs (8). One end of the spring (8) is located in the spring mounting slots (91).

5. The clamping conveyor wheel pair for conveying bar stock according to claim 4, characterized in that, The fixed cover (9) is adjustable left and right on the flat end (12), and is threaded to the flat end (12). On the side away from the pressure plate (7), there are N sets of locking pairs. Each locking pair includes two pin holes (92) symmetrically arranged around the rotating shaft (4). The 2N pin holes (92) are evenly distributed around the rotating shaft (4) and are located on the same circle concentric with the rotating shaft (4). The clamping conveyor wheel pair also includes a locking component (17), which includes a locking plate (71), a locking bolt (72), and two pins (73) fixedly connected to both ends of the locking plate (71). The locking plate (71) is arranged radially along the shaft (4), and a protruding key (74) is provided on the side near the flat end (12) along its direction, with a through hole (75) at the midpoint for the locking bolt (72) to pass through. A screw that mates with the locking bolt (72) is coaxially provided at the center of the flat end (12). The hole has a keyway (18) that mates with the convex key (74); the convex key (74) is embedded in the keyway (18); the locking bolt (72) and the pin (73) are located on the side of the locking plate (71) near the rotating shaft (4), and they are both arranged in the left and right direction; the locking bolt (72) is threadedly connected to the locking screw hole, which locks and fixes the locking plate (71) on the flat end (12); the two pins (73) are symmetrically arranged with respect to the locking bolt (72), and they are respectively inserted into the two pin holes (92) of a set of locking pairs.

6. The clamping conveyor wheel pair for conveying bar stock according to claim 5, characterized in that, The number of springs (8) is 3, and the included angle between two adjacent springs (8) is 120°; the number of pin holes (92) is 6, and the included angle between two adjacent pin holes (92) is 60°; the springs (8) and pin holes (92) are arranged alternately.

7. A conveying device for conveying bar stock, comprising a frame (21), a drive structure (22), and two lifting plates (23); the two lifting plates (23) are respectively disposed on the upper and lower parts of the frame (21), and can move synchronously toward or away from each other; characterized in that, It also includes M clamping conveyor wheel pairs (24) as described in any one of claims 1-6; the M clamping conveyor wheel pairs (24) are arranged side by side, with their driving wheels (2) and pressing wheels (3) respectively located on two lifting plates (23); the driving structure (22) is used to synchronously drive the M driving wheels (2) and it is located on the same lifting plate (23) as the driving wheels (2).

8. The apparatus according to claim 7, characterized in that, The device also includes M-1 guide tubes (25) through which the bar stock (1) passes, and M-1 guide tubes (25) and M clamping conveyor wheel pairs (24) are arranged alternately; the guide tubes (25) are arranged in the front-back direction, coaxially located outside the bar stock (1), fixed on the frame (21), and located between two lifting plates (23).

9. The apparatus according to claim 8, characterized in that, The number of clamping conveyor wheels (24) is two, and the number of conduits (25) is one.

10. The apparatus according to claim 8, characterized in that, M drive wheels (2) are arranged side by side on the upper lifting plate (23), and M pressing wheels (3) are arranged side by side on the lower lifting plate (23); The device also includes a rack and pinion synchronization structure (28), a cylinder (27), a wheeled meter counter (29), a support wheel (30), and two slide rails (26); the two slide rails (26) are arranged side by side on the frame (21), and are both vertically oriented; the front and rear ends of the lifting plate (23) are respectively slidably mounted on the two slide rails (26); the cylinder (27) is vertically oriented, located between the lower lifting plate (23) and the frame (21), between the two slide rails (26), and is used to drive the lower lifting plate (23) to slide up and down. The rack and pinion synchronization structure (28) is located between the two lifting plates (23), on the side of the lifting plate (23) away from the clamping conveyor wheel pair (24), and is used to make the two lifting plates (23) move towards each other or away from each other synchronously; the wheel-type meter counter (29) and the support wheel (30) are located on the upper and lower sides of the bar stock (1) respectively, and are respectively located on the upper lifting plate (23) and the lower lifting plate (23). The support wheel (30) is arranged in the left and right direction, and the wheel-type meter counter (29) is located directly above the support wheel (30).

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