A roll stock edge trimming device

Abstract

The application provides a roll material cutting device, and relates to the field of raw material cutting. The device comprises a support table, the top end of the support table is provided with two symmetrical mobile processing components, the mobile processing component comprises a moving assembly, the top end of the moving assembly is provided with a shearing assembly, the front and back of one side of the shearing assembly are both provided with a limiting assembly, the rear of the limiting assembly at the back is provided with an edge grinding assembly, the inside of the edge grinding assembly is provided with a sliding assembly, one side of the sliding assembly is provided with an adjusting assembly, one side of the edge grinding assembly is provided with a connecting assembly. The edge grinding assembly is arranged, the raw material is in contact with the edge grinding assembly after being processed by the shearing assembly, burrs on the side of the raw material are removed by the edge grinding assembly, the raw material is further processed, the shearing quality is improved, and the reliability and practicality are improved.

Description

Technical Field

[0001] This utility model relates to the field of raw material cutting, and more specifically, to a device for cutting the edge of rolled materials. Background Technology

[0002] In the field of metal rolling, the edge quality of coil raw materials is crucial. It is necessary to unwind the coil and trim its edges. Traditional trimming devices use disc shears to cut hot-rolled steel coils to remove defects such as oxide chips and microcracks from the edges of sheet or plate-shaped metal materials in order to correct the width and shape. However, the shearing is easily affected by the sharpness of the shearing disc, leaving burrs on the material edges. Moreover, the shearing process itself will generate micro burrs at the cut. The lack of function to remove these burrs limits the quality of correction and shearing.

[0003] For example, the Chinese invention patent (application number: 202310104907.1) discloses a "disc shearing machine," the description of which states that it includes a base, a disc shear body at one end of the base, and several evenly distributed grooves at the upper part of the other end of the base. A suction limiting component is provided within each groove, and the suction limiting component includes a duct disposed within the groove. An air intake is provided on the upper side of the duct, and a fan connected to the ventilation duct is provided on the base. This application has the effect of precisely shearing sheet metal, improving the processing accuracy of sheet metal, and reducing processing errors; the above patent can corroborate the deficiencies of the prior art.

[0004] Therefore, we have made improvements to this by proposing a roll material cutting device. Utility Model Content

[0005] The purpose of this invention is to solve the problem of low cutting quality in current edge-cutting devices.

[0006] To achieve the above-mentioned objectives and improve the above-mentioned problems, this utility model provides a roll material cutting device, including a support platform. The top of the support platform is provided with two symmetrically arranged movable processing components. Each movable processing component includes a moving assembly. The top of the moving assembly is provided with a shearing assembly. Limiting assemblies are provided at the front and rear of one side of the shearing assembly. A grinding assembly is provided behind the limiting assembly located at the rear. A sliding assembly is provided inside the grinding assembly. An adjusting assembly is provided on one side of the sliding assembly. A connecting assembly is provided on one side of the grinding assembly.

[0007] As a preferred technical solution of this application, the edge grinding assembly includes a support base, a connecting plate is fixedly provided on one side of the support base, a grinding spring is provided on one side of the connecting plate, and a grinding texture is provided on one side of the grinding spring.

[0008] As a preferred technical solution of this application, the sliding component includes a mounting frame, a connecting block is slidably provided inside the mounting frame, an elastic element is provided outside the mounting frame, and the two sides of the grinding spring are curved toward one side of the support seat.

[0009] As a preferred technical solution of this application, the adjustment component includes two support plates, and two connecting grooves are formed on the connecting plate. The two connecting grooves are respectively located above and below the mounting frame. The support plate is slidably connected to the interior of the connecting grooves. An installation groove is formed on the side of the support plate near the support seat. A fixing plate is slidably provided inside the installation groove. The fixing plate is fixedly connected to the connecting plate. A control component is provided on the side of the fixing plate away from the support plate. An elastic pad is fixedly provided on the side of the support plate near the grinding spring.

[0010] As a preferred technical solution of this application, the connecting assembly includes a plurality of screws, and the screws have connecting holes opened on the connecting block on the side near the grinding spring. The end of the screw passes through the grinding spring and is connected to the internal thread of the connecting hole.

[0011] As a preferred technical solution of this application, the movable component includes two mounting seats, which are fixed to the top of the support platform. Slide rails are provided at the front and rear of the two mounting seats, and the slide rails are fixedly connected to the support platform. A lead screw is rotatably provided between the two mounting seats, and a fixed seat is driven on the lead screw. A mounting plate is fixedly provided at the top of the fixed seat, and the mounting plate is slidably connected to the slide rail.

[0012] As a preferred technical solution of this application, the shearing assembly includes a mounting shell, which is fixedly connected to the top of the mounting plate. A connecting shaft is rotatably provided inside the mounting shell. A first shearing disc is provided on one side of the mounting shell. One end of the connecting shaft passes through the mounting shell and is fixedly connected to the first shearing disc. An mounting shaft that is rotatably connected to the mounting shell is provided above the connecting shaft. A second shearing disc is provided above the first shearing disc. One end of the mounting shaft passes through the mounting shell and is fixedly connected to the second shearing disc. Gears are fixedly provided on the circumference of both the mounting shaft and the connecting shaft, and the two gears mesh.

[0013] As a preferred technical solution of this application, the limiting component includes two connecting seats, which are fixedly connected to the mounting shell. Each of the two connecting seats has a plurality of limiting wheels rotatably arranged on opposite sides, and the limiting wheels have contact elements on their outer surfaces.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the scheme of this application:

[0016] 1. By setting up an edge grinding component, the raw material comes into contact with the edge grinding component after the edge is processed by the shearing component. The edge grinding component removes the burrs on the side of the raw material and further smooths it, improving the shearing quality, increasing reliability and practicality, and solving the problem of low shearing quality in existing edge cutting devices.

[0017] 2. By setting the adjustment component, the curvature of the grinding spring in the edge grinding component can be adjusted, so that it can have a variety of grinding modes and achieve different grinding effects through different shapes. This solves the problem of the single function and poor adaptability of the traditional grinding structure in the existing technology. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the roll material cutting device provided in this application;

[0019] Figure 2 A schematic diagram of the shearing component in the roll material cutting device provided in this application;

[0020] Figure 3 A schematic diagram of the limiting component in the roll material cutting device provided in this application;

[0021] Figure 4 A schematic diagram of the edge grinding component in the roll material edge cutting device provided in this application;

[0022] Figure 5 This is a schematic diagram of the sliding component in the roll material cutting device provided in this application.

[0023] The image shows:

[0024] 1. Support platform; 2. Moving component; 21. Mounting base; 22. Lead screw; 23. Slide rail; 24. Mounting plate; 25. Drive geared motor; 26. Fixed base; 3. Shearing component; 31. Mounting shell; 32. Connecting shaft; 33. First shearing disc; 34. Mounting shaft; 35. Second shearing disc; 36. Gear; 37. Shearing geared motor; 4. Limiting component; 41. Connecting base; 42. Limiting wheel; 43. Contact pad; 5. Grinding component; 51. Support base; 52. Connecting plate; 53. Grinding spring; 6. Sliding component; 61. Mounting frame; 62. Connecting block; 63. Elastic frame; 7. Adjusting component; 71. Connecting groove; 72. Fixed plate; 73. Support plate; 74. Mounting groove; 75. Control rod; 76. Elastic pad; 8. Connecting component; 81. Connecting hole; 82. Screw. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] Example 1

[0030] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A roll material cutting device includes a support platform 1. Two symmetrically arranged movable processing components are provided at the top of the support platform 1. Each movable processing component includes a movable assembly 2, which moves a shearing assembly 3 to adjust the shearing width and position. The shearing assembly 3 is located at the top of the movable assembly 2 and is used to shear the raw material. Limiting components 4 are provided at the front and rear of one side of the shearing assembly 3 to restrict the raw material and prevent displacement during the shearing process. A grinding assembly 5 is located behind the rear limiting component 4 to grind the side surface after shearing. The grinding process removes burrs generated after side shearing, thereby improving the shearing quality. The grinding assembly 5 has a sliding assembly 6 inside. The sliding assembly 6 is used to provide a buffer distance for the area of ​​the grinding assembly 5 used for grinding and to ensure its contact force with the raw material, thereby improving flexibility and grinding quality. An adjustment assembly 7 is provided on one side of the sliding assembly 6. The adjustment assembly 7 is used to adjust and control the curvature of the area of ​​the grinding assembly 5 used for grinding and can control its curvature to enable it to have various grinding modes. A connecting assembly 8 is provided on one side of the grinding assembly 5. The connecting assembly 8 is used to facilitate the disassembly and replacement of the grinding part of the grinding assembly 5.

[0031] Furthermore, such as Figure 1As shown, the movable component 2 includes two mounting bases 21, which are fixed to the top of the support platform 1. Slide rails 23 are provided at the front and rear of each mounting base 21. The mounting plate 24 slides on the slide rails 23 during movement to ensure stability. The slide rails 23 are fixedly connected to the support platform 1. A lead screw 22 is rotatably mounted between the two mounting bases 21. A fixed seat 26 is driven on the lead screw 22. The lead screw 22 and the fixed seat 26 are connected by a ball nut or a threaded connection, so that when the lead screw 22 rotates, it drives the fixed seat 26 and the mounting plate 24 to move. The top of the fixed seat 26 is fixedly fitted with the mounting plate 24, which is slidably connected to the slide rails 23. A drive reduction motor 25 is fixedly mounted on the side of one mounting base 21 away from the lead screw 22. The output end of the drive reduction motor 25 passes through the mounting base 21 and is fixedly connected to the lead screw 22. When the drive reduction motor 25 starts, it drives the lead screw 22 to rotate. The drive reduction motor 25 and the shear reduction motor 37 include, but are not limited to, worm gear reduction motors.

[0032] Furthermore, such as Figure 1 and Figure 2 As shown, the shearing assembly 3 includes a mounting shell 31, which is fixedly connected to the top of the mounting plate 24. A connecting shaft 32 is rotatably mounted inside the mounting shell 31. When the connecting shaft 32 rotates, the first shearing disc 33 also rotates. The first shearing disc 33 is located on one side of the mounting shell 31. One end of the connecting shaft 32 passes through the mounting shell 31 and is fixedly connected to the first shearing disc 33. A shearing reduction motor 37 is fixedly mounted on the side of the mounting shell 31 away from the first shearing disc 33. The output end of the shearing reduction motor 37 passes through the mounting shell 31 and is fixedly connected to the connecting shaft 32. Starting the shearing reduction motor 37 drives the connecting shaft 32 to rotate. A rotatable connection is located above the connecting shaft 32, which is rotatably connected to the interior of the mounting shell 31. The mounting shaft 34 rotates, and the second shearing disc 35 rotates accordingly. The second shearing disc 35 is located above the first shearing disc 33. The position of the second shearing disc 35 is offset from that of the first shearing disc 33. When the raw material enters between the rotating second shearing disc 35 and the first shearing disc 33, the edges of the raw material are sheared by the second shearing disc 35 and the first shearing disc 33. One end of the mounting shaft 34 passes through the mounting shell 31 and is fixedly connected to the second shearing disc 35. Gears 36 are fixedly provided on the circumference of both the mounting shaft 34 and the connecting shaft 32. When the connecting shaft 32 rotates, the mounting shaft 34 is driven to rotate through the meshing between the two gears 36.

[0033] Furthermore, such as Figure 1 and Figure 3As shown, the limiting component 4 includes two connecting seats 41, which are fixedly connected to the mounting shell 31. Several limiting wheels 42 are rotatably provided on the opposite side of the two connecting seats 41. The limiting wheels 42 are used to limit the raw material and prevent it from shifting its position. The outside of the limiting wheels 42 is provided with contact members for contacting the plate-shaped or sheet-shaped raw material.

[0034] Furthermore, such as Figure 3 As shown, the contact element includes a contact pad 43, which is made of rubber, among other things. The elasticity of the contact pad 43 allows it to accommodate materials of greater thickness. The contact pad 43 is fixedly connected to the circumferential side of the limiting wheel 42. By contacting the material with the contact pad 43, the material is clamped between the upper and lower limiting wheels 42, which restricts its position. The material moves in conjunction with the first shearing disc 33 and the second shearing disc 35 to cut its edges.

[0035] Example 2

[0036] The roll material cutting device provided in Example 1 is further optimized, specifically, as follows: Figure 1 , Figure 4 and Figure 5 As shown, the edge grinding assembly 5 includes a support base 51, a connecting plate 52 is fixedly provided on one side of the support base 51, and a grinding spring 53 is provided on one side of the connecting plate 52. The grinding spring 53 includes, but is not limited to, SUP9 spring steel. SUP9 spring steel has good wear resistance, elastic deformation ability and springback recovery. A grinding texture is provided on one side of the grinding spring 53. The grinding texture includes, but is not limited to, a grid-like groove opened on the grinding spring 53, so that multiple small protrusions are formed on the side of the grinding spring 53 away from the support base 51.

[0037] The burrs on the side of the raw material are removed by grinding the texture on the grinding spring 53. The grinding spring 53 can be bent by pushing the upper and lower parts of the grinding spring 53 through the adjusting component 7, so that the grinding spring 53 contacts the side of the raw material with a flat or curved surface. When grinding with a flat surface, the grinding spring 53 can be fully trimmed and ground to eliminate the unevenness of the entire side and make the side a smooth and uniform vertical plane. When the grinding spring 53 contacts the side of the raw material with a curved surface through the adjusting component 7, the curvature is increased to make the middle of the grinding spring 53 bulge, so that the grinding spring 53 contacts the upper and lower corners of the side of the steel strip, thereby chamfering and blunting the side edge. When the adjusting component 7 is not in contact with the grinding spring 53, the grinding spring 53 recovers its elasticity.

[0038] The support base 51 is fixedly connected to the mounting shell 31, and the two support bases 51 are located on opposite sides of the two mounting shells 31.

[0039] Furthermore, such as Figure 4 and Figure 5As shown, the sliding component 6 includes a mounting frame 61. A connecting block 62 is slidably provided inside the mounting frame 61. The sliding of the connecting block 62 and the mounting frame 61 ensures that the movement of the grinding spring 53 will not be offset. An elastic element is provided on the outside of the mounting frame 61. The two sides of the grinding spring 53 are curved toward one side of the support base 51. When the plate-shaped or sheet-shaped metal material, i.e., the raw material, comes into contact with the grinding spring 53, the inclined surface at one end of the grinding spring 53 can push the grinding spring 53 toward the side closer to the support base 51, thereby compressing the elastic frame 63.

[0040] Furthermore, such as Figure 4 and Figure 5 As shown, the elastic element includes an elastic frame 63, which is made of rubber, among other things. When the grinding spring 53 contacts the raw material through its curved side, the grinding spring 53 is pushed toward the support seat 51 and the elastic frame 63 is compressed. The elasticity of the elastic frame 63 ensures the contact force between the grinding spring 53 and the raw material. The grinding spring 53 can also be moved manually. Then, the raw material is placed on the side of the grinding spring 53 with the grinding texture. The grinding spring 53 is released and the elastic force of the elastic frame 63 makes the grinding spring 53 contact the raw material. The elastic frame 63 is fixedly connected to the connecting plate 52.

[0041] Furthermore, such as Figure 4 and Figure 5 As shown, the connecting assembly 8 includes several screws 82. The screws 82 are located on the side of the grinding spring 53 away from the mounting frame 61. The side of the screw 82 near the grinding spring 53 has a connecting hole 81 opened on the connecting block 62. By rotating the screw 82 with a screwdriver, it is separated from the connecting hole 81, thereby removing the screw 82 and separating the grinding spring 53 from the connecting block 62 so as to replace another grinding spring 53. The end of the screw 82 passes through the grinding spring 53 and is connected to the internal thread of the connecting hole 81.

[0042] Example 3

[0043] The roll material cutting device provided in Examples 1 and 2 has been further optimized, such as... Figure 4 and Figure 5As shown, the adjustment component 7 includes two support plates 73. The support plates 73 move to push the grinding spring 53, which can be bent by the elasticity of the grinding spring 53. The connecting plate 52 has two connecting grooves 71 that communicate with both sides of the connecting plate 52. The two connecting grooves 71 are located above and below the mounting frame 61 respectively. The support plate 73 is slidably connected to the inside of the connecting grooves 71. When the support plate 73 moves, it slides inside the connecting grooves 71 to ensure the stability of the movement. The side of the support plate 73 near the support base 51 has a mounting groove 74. The mounting groove 74 has a fixed plate 72 that slides inside the mounting groove 74. The fixed plate 72 is used to connect with the control component. The fixed plate 72 is fixedly connected to the connecting plate 52. The side of the fixed plate 72 away from the support plate 73 has a control component that is used to control the movement of the support plate 73. The side of the support plate 73 near the grinding spring 53 has an elastic pad 76 that is fixedly provided. The elastic pad 76 is made of, but is not limited to, silicone. The elasticity of the elastic pad 76 allows the part of the grinding spring 53 that contacts the elastic pad 76 to have a certain movable distance.

[0044] The control room includes a control lever 75. One end of the control lever 75 near the support plate 73 passes through the fixing plate 72 and is rotatably connected to the inside of the mounting groove 74. The control lever 75 is threadedly connected to the fixing plate 72. Rotating the control lever 75 will drive the support plate 73 to move through the thread between it and the fixing plate 72. The other end of the control lever 75 is fixedly provided with a handle for the user to easily rotate the control lever 75.

[0045] The usage process of the roll material cutting device provided by this utility model is as follows:

[0046] When it is necessary to trim the edges of plate or sheet metal raw materials, the shearing reduction motor 37 is started to drive the connecting shaft 32 to rotate. The connecting shaft 32 drives the mounting shaft 34 to rotate through the meshing of two gears 36, thereby causing the first shearing disc 33 and the second shearing disc 35 to rotate. The raw material is fed into the interior of the two side limiting components 4, and is restricted by the contact pad 43 between the upper and lower limiting wheels 42. The two sides of the raw material are respectively located in front of the first shearing disc 33 and the second shearing disc 35 on both sides, so that the raw material moves towards the first shearing disc 33 and the second shearing disc 35, thereby entering the first shearing disc 33 and the second shearing disc 35 to rotate and trim its edges. The two sides of the raw material are trimmed by the shearing components 3 on both sides. The trimmed part of the raw material contacts the grinding spring 53, and the grinding texture on the side of the grinding spring 53 further grinds the trimmed part flat.

[0047] When it is necessary to move the shearing assembly 3 by moving the moving assembly 2 to adjust the position of the shearing assembly 3, the drive reduction motor 25 is started to rotate the lead screw 22, thereby driving the fixed base 26 and the mounting plate 24 to move, and thus the shearing assembly 3 also moves, so that the position of the shearing assembly 3 can be adjusted.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A device for cutting edges of rolled material, characterized in that, The device includes a support platform (1), and two symmetrically arranged movable processing components are provided at the top of the support platform (1). The movable processing components include a movable component (2), and a shearing component (3) is provided at the top of the movable component (2). A limiting component (4) is provided at the front and back of one side of the shearing component (3). A grinding component (5) is provided behind the limiting component (4) located at the rear. A sliding component (6) is provided inside the grinding component (5). An adjusting component (7) is provided on one side of the sliding component (6). A connecting component (8) is provided on one side of the grinding component (5).

2. The roll material cutting device according to claim 1, characterized in that, The edge grinding assembly (5) includes a support base (51), a connecting plate (52) is fixedly provided on one side of the support base (51), a grinding spring (53) is provided on one side of the connecting plate (52), and a grinding texture is provided on one side of the grinding spring (53).

3. The roll material cutting device according to claim 2, characterized in that, The sliding component (6) includes a mounting frame (61), a connecting block (62) is slidably provided inside the mounting frame (61), an elastic element is provided outside the mounting frame (61), and the two sides of the grinding spring (53) are curved toward one side of the support seat (51).

4. The roll material cutting device according to claim 3, characterized in that, The elastic element includes an elastic frame (63), which is fixedly connected to the connecting plate (52).

5. The roll material cutting device according to claim 2, characterized in that, The adjustment assembly (7) includes two support plates (73), and two connecting grooves (71) are opened on the connecting plate (52). The two connecting grooves (71) are located above and below the mounting frame (61) respectively. The support plate (73) is slidably connected to the interior of the connecting groove (71). The support plate (73) has an installation groove (74) on the side near the support base (51). A fixing plate (72) is slidably provided inside the installation groove (74). The fixing plate (72) is fixedly connected to the connecting plate (52). A control component is provided on the side of the fixing plate (72) away from the support plate (73). An elastic pad (76) is fixedly provided on the side of the support plate (73) near the grinding spring (53).

6. A roll material cutting device according to claim 4 or 5, characterized in that, The connecting assembly (8) includes a plurality of screws (82), and the screws (82) have a connecting hole (81) on the connecting block (62) on the side near the grinding spring (53). The end of the screw (82) passes through the grinding spring (53) and is connected to the internal thread of the connecting hole (81).

7. A roll material cutting device according to claim 1 or 5, characterized in that, The movable component (2) includes two mounting seats (21), which are fixed to the top of the support platform (1). Slide rails (23) are provided at the front and rear of the two mounting seats (21). The slide rails (23) are fixedly connected to the support platform (1). A lead screw (22) is rotatably provided between the two mounting seats (21). A fixed seat (26) is driven on the lead screw (22). A mounting plate (24) is fixedly provided at the top of the fixed seat (26). The mounting plate (24) is slidably connected to the slide rail (23).

8. The roll material cutting device according to claim 7, characterized in that, The shearing assembly (3) includes a mounting shell (31), which is fixedly connected to the top of the mounting plate (24). A connecting shaft (32) is rotatably provided inside the mounting shell (31). A first shearing disc (33) is provided on one side of the mounting shell (31). One end of the connecting shaft (32) passes through the mounting shell (31) and is fixedly connected to the first shearing disc (33). An mounting shaft (34) is provided above the connecting shaft (32) and is rotatably connected to the mounting shell (31). A second shearing disc (35) is provided above the first shearing disc (33). One end of the mounting shaft (34) passes through the mounting shell (31) and is fixedly connected to the second shearing disc (35). Gears (36) are fixedly provided on the circumference of both the mounting shaft (34) and the connecting shaft (32). The two gears (36) mesh.

9. A roll material cutting device according to claim 8, characterized in that, The limiting component (4) includes two connecting seats (41), which are fixedly connected to the mounting shell (31). Each of the two connecting seats (41) has a plurality of limiting wheels (42) rotatably arranged on opposite sides, and the limiting wheels (42) have contact elements on their outer surfaces.

10. A roll material cutting device according to claim 9, characterized in that, The contact element includes a contact pad (43), which is fixedly connected to the circumferential side of the limiting wheel (42).

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