Riveting machine step feeding device and feeding method

Abstract

This invention discloses a stepping feeding device and method for a riveting machine. The stepping feeding device includes a drive cylinder, a helical gear assembly connected to the drive cylinder, and a rotating wheel. The drive cylinder applies a pushing force along the axial direction of the helical gear assembly. The helical gear assembly is connected to an elastic element that can drive the helical gear assembly to reset, and the helical gear assembly can convert the pushing force along the axial direction of the helical gear assembly into a rotational force along the axial direction of the helical gear assembly, causing the helical gear assembly to rotate. The rotating wheel is connected to the helical gear assembly and can rotate with the helical gear assembly. The rotating wheel is connected to a material belt and can drive the material belt to move. This invention can use a conventional cylinder that performs linear reciprocating motion as the drive cylinder to achieve stepping feeding, which has low manufacturing cost and high power.

Description

Technical Field

[0001] This invention relates to the field of riveting machines, and in particular to a stepping feeding device for a riveting machine and its feeding method. Background Technology

[0002] Existing riveting machines can already automate riveting operations. During the automated operation, rivets need to be fed to the processing area in sequence, so a step-feeding device needs to be set in the riveting machine to achieve automatic feeding of the material strip.

[0003] Existing riveting machines typically achieve automatic feeding by placing the material strip on a rotating wheel and connecting the wheel to a rotary cylinder. The rotating cylinder feeds the material strip onto the wheel in a step-by-step motion. However, rotary cylinders are expensive to manufacture and have higher power losses and lower torque compared to cylinders that perform linear reciprocating motion. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a stepping feeding device for a riveting machine. This device uses a conventional cylinder that performs linear reciprocating motion as the driving cylinder, resulting in lower manufacturing costs and higher power.

[0005] Meanwhile, a feeding method for the aforementioned riveting machine step feeding device is provided.

[0006] This invention is achieved through the following technical solution:

[0007] A stepping feeding device for a riveting machine includes a drive cylinder, a helical gear assembly connected to the drive cylinder, and a rotary wheel; the drive cylinder applies a pushing force to the helical gear assembly along the axial direction of the helical gear assembly; the helical gear assembly is connected to an elastic element that can drive the helical gear assembly to reset, and the helical gear assembly can convert the pushing force along the axial direction of the helical gear assembly into a rotational force along the axial direction of the helical gear assembly, causing the helical gear assembly to rotate; the rotary wheel is connected to the helical gear assembly and can rotate with the helical gear assembly; the rotary wheel is connected to a material belt and can drive the material belt to move.

[0008] Furthermore, the helical gear assembly includes a fixed gear disk with multiple fixed inclined surfaces, a drive gear disk with multiple driving inclined surfaces, and a rotating gear disk with multiple rotating inclined surfaces; the rotating inclined surfaces abut against the driving inclined surfaces or fixed inclined surfaces and can slide obliquely relative to the driving inclined surfaces or fixed inclined surfaces.

[0009] Furthermore, the rotating gear disk is fixedly connected to a connecting rod; the connecting rod is connected to the rotating wheel, and an elastic element is connected to the end of the connecting rod away from the driving gear disk.

[0010] Furthermore, the fixed inclined plane, the driving inclined plane, and the rotating inclined plane are parallel to each other.

[0011] Furthermore, the fixed gear disk is provided with multiple fixed teeth, and the fixed inclined surface is provided at the end of the fixed teeth away from the drive cylinder; the drive gear disk is provided with multiple drive teeth, and the drive inclined surface is provided at the end of the drive teeth away from the drive cylinder; the rotating gear disk is provided with multiple rotating teeth, and the rotating inclined surface is provided at the end of the rotating teeth close to the drive cylinder.

[0012] Furthermore, the plurality of fixed teeth are evenly distributed, and a tooth groove is formed between two adjacent fixed teeth. The driving teeth are disposed in the tooth groove and can slide relative to the fixed teeth along the axial direction of the helical gear assembly.

[0013] Furthermore, the connecting rod is provided with a keyway, the rotating wheel is provided with a connecting key, the connecting key is disposed in the keyway, and the length of the connecting key is less than the length of the keyway.

[0014] Furthermore, the roller is connected to a material belt, and the outer wall of the roller is provided with a plurality of protrusions evenly distributed along the circumferential direction of the roller. The material belt is provided with a plurality of fixing grooves, and the protrusions pass through the fixing grooves.

[0015] Furthermore, the two ends of the roller are respectively provided with stepped surfaces, and the two sides of the material belt are respectively provided with side ribs, which abut against the stepped surfaces.

[0016] A feeding method for the above-mentioned riveting machine step feeding device is characterized by comprising the following steps:

[0017] Inclined surface fitting: The driving inclined surface is fitted with the rotating inclined surface, and an elastic element is connected to one end of the rotating gear disk;

[0018] Start drive cylinder: The start drive cylinder pushes the drive gear plate and the rotating gear plate to move, and squeezes the elastic element;

[0019] First rotation of the rotating inclined plane: When the driving inclined plane moves to the same inclined plane as the fixed inclined plane, the elastic element rebounds and drives the rotating inclined plane of the rotating gear disk to rotate obliquely along the driving inclined plane until it is in contact with the fixed inclined plane; the rotating gear disk drives the wheel to rotate.

[0020] Second rotation of the inclined plane: The drive cylinder drives the drive gear plate to reset, the elastic element further rebounds and drives the rotating inclined plane of the rotating gear plate to rotate obliquely along the fixed inclined plane until it is in contact with the drive inclined plane; the rotating gear plate drives the wheel to rotate.

[0021] Stepping cycle: The driving cylinder reciprocates, and the rotating inclined plane repeats the steps "first rotation of the inclined plane" and "second rotation of the inclined plane" in a cycle.

[0022] Compared with the prior art, the advantages of this invention are:

[0023] 1. By cooperating with the drive cylinder and the helical gear assembly with a fixed inclined surface, a drive inclined surface, and a rotating inclined surface, the linear motion of the output shaft of the drive cylinder is converted into the rotational motion of the rotating gear disk in the helical gear assembly; and a single reciprocating motion of the drive cylinder can rotate the rotating inclined surface that is in contact with the drive inclined surface to be in contact with the next drive inclined surface, thereby realizing that the rotating gear disk rotates a fixed angle for one reciprocating motion of the drive cylinder, so as to realize the stepping motion of the rotating gear disk, and thus realize the stepping motion of the material belt.

[0024] 2. By setting the drive teeth in the tooth groove formed by two adjacent fixed teeth, the drive teeth and fixed teeth abut against the rotating teeth in sequence during the movement of the rotating teeth, thereby restricting the movement of the rotating teeth and improving the movement accuracy of the rotating teeth.

[0025] 3. The self-locking function is achieved through the cooperation of the fixed teeth, drive teeth, and rotating teeth, preventing the rotating tooth assembly from rotating.

[0026] 3. By combining the raised rollers with the fixed grooves on the belt, the retraction of the belt when it connects to the rollers is effectively prevented. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a stepping feeding device for a riveting machine according to a preferred embodiment of the present invention;

[0028] Figure 2 for Figure 1 A plan sectional view of the stepping feeder of a riveting machine;

[0029] Figure 3 for Figure 1 A schematic diagram of the structure when the central helical gear assembly is initially connected to the rotor;

[0030] Figure 4 for Figure 1 Exploded view of the central helical gear assembly;

[0031] Figure 5 for Figure 3 A schematic diagram of the structure of the helical gear assembly and the rotary wheel after the helical gear assembly is pushed by the driving cylinder;

[0032] Figure 6 for Figure 3 A schematic diagram of the helical gear assembly and the rotating wheel after the first rotation of the inclined plane.

[0033] Figure 7 for Figure 3 A schematic diagram of the helical gear assembly and the rotor after the central drive air rod resets;

[0034] Figure 8 for Figure 1 Schematic diagram of the connection between the rotating gear disk and the wheel;

[0035] Figure 9 for Figure 1 Schematic diagram of the connection between the intermediate roller and the conveyor belt;

[0036] Figure 10 for Figure 1 A schematic diagram of the opening state of the central door opening and closing assembly;

[0037] Figure 11 This is a flowchart of the feeding method of the step feeding device for the riveting machine of the present invention. Detailed Implementation

[0038] The following detailed, non-limiting description of the invention's technical solutions, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0039] like Figure 1 and Figure 2 As shown, a stepping feeding device for a riveting machine, corresponding to a preferred embodiment of the present invention, includes a drive cylinder 1, a helical gear assembly 2 connected to the drive cylinder 1, a rotating wheel 3, and a mounting base 5. The output shaft 11 of the drive cylinder 1 is connected to the helical gear assembly 2 and provides a pushing force along the axis H of the helical gear assembly 2. The helical gear assembly 2 is connected to an elastic element 236 that can drive the helical gear assembly 2 to reset, and the helical gear assembly 2 can convert the pushing force along the axis H of the helical gear assembly 2 into a rotational force along the axis H of the helical gear assembly 2, causing the helical gear assembly 2 to rotate. The helical gear assembly 2 is connected to the rotating wheel 3 and can drive the rotating wheel 3 to rotate. The rotating wheel 3 is connected to a material belt 4 and can drive the material belt 4 to rotate. The mounting base 5 is connected to the drive cylinder 1 and houses the helical gear assembly 2 and the rotating wheel 3.

[0040] Further reference Figure 3 and Figure 4The rotary gear assembly 2 includes a fixed gear disk 211 with multiple fixed inclined surfaces 213, a drive gear disk 212 with multiple drive inclined surfaces 218, and a rotary gear disk 231 with multiple rotational inclined surfaces 233. The fixed gear disk 211 is fixedly connected to a mounting bracket. The fixed gear disk 211 includes an annular portion 215, multiple fixed inclined surfaces 213, and multiple fixed teeth 214. The number of fixed inclined surfaces 213 and fixed teeth 214 is the same; specifically, the fixed inclined surfaces 213 are located at the end of the fixed teeth 214 away from the drive cylinder 1. The fixed teeth 214 are cuboid structures with a beveled cut at one end. The multiple fixed teeth 214 are evenly distributed along the circumference of the annular portion 215 and are all integrally formed with the annular portion 215. A tooth groove 216 is formed between two adjacent fixed teeth 214. The annular portion 215 is hollow inside and has a first sliding groove 217.

[0041] The drive gear disk 212 is connected to the drive cylinder 1 and can move along the axis H of the helical gear assembly 2 under the action of the drive cylinder 1. The drive gear disk 212 is provided with a first column portion 220, multiple drive inclined surfaces 218 connected to the drive cylinder 1, and multiple drive teeth 219. The multiple drive teeth 219 are integrally formed with the first column portion 220. A second sliding groove 221 is provided on the side wall of the first column portion 220. The second sliding groove 221 and the first sliding groove 217 are engaged and together form a cylindrical cavity 222. A sliding rod 223 is provided in the cylindrical cavity 222. By providing the sliding rod 223, the drive gear disk 212 can be prevented from rotating relative to the fixed gear disk 211; at the same time, the drive gear disk 212 can slide along the axial direction of the sliding rod 223. The drive inclined surfaces 218 can move synchronously with the drive cylinder 1; the drive inclined surfaces 218 are parallel to the fixed inclined surfaces 213. Meanwhile, the number of driving inclined surfaces 218 and driving teeth 219 is the same; specifically, the driving inclined surfaces 218 are located at the end of the driving teeth 219 away from the driving cylinder 1. The driving teeth 219 are evenly distributed circumferentially along the first cylindrical portion 220 and are located in the tooth grooves 216 of the fixed tooth disk 211. The driving teeth 219 are cuboid structures with a beveled cut at one end. The driving teeth 219 can slide relative to the fixed teeth 214 in the axis H direction of the rotatable tooth assembly 2.

[0042] The rotating gear disk 231 can be attached to the driving inclined surface 218 or the fixed inclined surface 213 and can slide obliquely relative to the driving inclined surface 218 or the fixed inclined surface 213. Specifically, the rotating gear disk 231 includes a second columnar portion 235, a plurality of rotating teeth 234, and a plurality of rotating inclined surfaces 233. The rotating inclined surfaces 233 abut against the driving inclined surface 218 or the fixed inclined surface 213 and can slide obliquely relative to the driving inclined surface 218 or the fixed inclined surface 213. The rotating inclined surfaces 233 are parallel to the fixed inclined surfaces 213. The number of rotating inclined surfaces 233 is the same as the number of rotating teeth 234; specifically, the rotating inclined surfaces 233 are located at the end of the rotating teeth 234 near the driving cylinder 1. The rotating teeth 234 are evenly distributed along the circumference of the second columnar portion 235. The rotating teeth 234 are cuboid structures with a beveled cut at one end. Preferably, the number of fixed teeth 214, driving teeth 219, and rotating teeth 234 is the same.

[0043] The rotating gear disk 231 is also fixedly connected to a connecting rod 232. Specifically, the connecting rod 232 is integrally formed with the rotating gear disk 231. The connecting rod 232 is connected to the rotating wheel 3 and can drive the rotating wheel 3 to rotate; furthermore, the connecting rod 232 is slidably connected to the rotating wheel 3 and can slide relative to the rotating wheel 3 along the axial direction of the connecting rod 232 (described later). The connecting rod 232 is integrally formed with the rotating gear disk 231. The connecting rod 232 is provided with a keyway 237 that mates with the rotating wheel 3. An elastic element 236 is connected to the end of the connecting rod 232 away from the driving gear disk 212. Specifically, the connecting rod 232 is provided with a step 238, which is connected to the elastic element 236; preferably, a washer is provided between the step 238 and the elastic element 236. The elastic element 236 is preferably a spring.

[0044] Further reference Figures 5 to 7 The rotating inclined plane 233 abuts against the driving inclined plane 218 or the fixed inclined plane 213 and can slide obliquely relative to the driving inclined plane 218 or the fixed inclined plane 213. Specifically, in the initial state (e.g.) Figure 3 As shown), the rotating inclined surface 233 of the rotating tooth 234 is in contact with the driving inclined surface 218 of the driving tooth 219, and the rotating tooth 234 and the driving tooth 219 are disposed in the tooth groove 216 of the fixed tooth disk 211. In use, the driving cylinder 1 drives the driving tooth disk 212 to move to the right along the axis H of the rotating tooth assembly 2, simultaneously causing the rotating tooth 234, which abuts against the driving tooth 219 of the driving tooth disk 212, to move to the right. At this time, the connecting rod 232, which is fixedly connected to the rotating tooth disk 231, moves to the right and compresses the elastic element 236. When the driving tooth 219 moves to the point where the driving inclined surface 218 and the fixed inclined surface 213 are on the same inclined plane (e.g., ...), the rotational inclined surface 233 of the rotating tooth 234 is in contact with the driving inclined surface 218 of the driving tooth 219 (e.g., ...). Figure 5 As shown), the rotating gear disk 231 moves to the left under the elastic force of the elastic element 236. At this time, the rotating inclined plane 233 slides relative to the driving inclined plane 218 and fits against the fixed inclined plane 213 (as shown). Figure 6(As shown); and, after the rotating inclined plane 233 and the fixed inclined plane 213 are engaged, the rotating tooth 234 abuts against the driving tooth 219 to prevent the rotating tooth 234 from rotating further. Afterwards, the driving cylinder 1 resets and drives the driving gear disk 212 to reset (as shown). Figure 7 As shown in the diagram, at this time, the rotating tooth 234 separates from the driving tooth 219, and the rotating tooth 234 slides obliquely along the fixed inclined surface 213 under the push of the elastic member 236 until it is in contact with the driving inclined surface 218. At this time, the rotating tooth 234, which was initially set in a tooth groove 216, rotates to the next tooth groove 216 adjacent to this tooth groove 216, so that the rotating tooth disk 231 and the connecting rod 232 fixedly connected to the rotating tooth disk 231 rotate by a fixed angle. Furthermore, after the rotating inclined surface 233 is in contact with the driving inclined surface 218, the rotating tooth 234 abuts against the fixed tooth 214 to prevent the rotating tooth 234 from rotating further. When the driving cylinder 1 pushes the driving tooth disk 212 to reciprocate again, the rotating tooth assembly 2 repeats the above steps. By adjusting the dimensions of the tooth groove 216, fixed tooth 214, drive tooth 219, and rotating tooth 234, the rotation angle of the connecting rod 232 during one reciprocating motion of the drive cylinder 1 can be adjusted; consequently, the rotation angle of the rotary wheel 3 connected to the connecting rod 232 can be adjusted to adapt to the processing of material strips 4 with different spacing. Through the cooperation of the fixed tooth 214, drive tooth 219, and rotating tooth 234, after each step movement, the drive tooth 219 and rotating tooth 234 are both positioned in the tooth groove 216 formed by adjacent fixed teeth 214. The two ends of the rotating tooth 234 abut against two adjacent fixed teeth 214, limiting the rotation of the rotating tooth 234 and effectively preventing the rotating tooth disk 231 from rotating back, thus realizing the self-locking function of the stepping feeding device.

[0045] Further reference Figure 8 The inner wall of the rotating wheel 3 is provided with a connecting key 31; the outer wall 32 of the rotating wheel 3 is provided with a stepped surface 34 and a protrusion 33. Multiple protrusions 33 are provided and evenly distributed along the circumferential direction of the rotating wheel 3. A pair of stepped surfaces 34 are provided, and the pair of stepped surfaces 34 are symmetrically arranged at both ends of the rotating wheel 3. The connecting key 31 is provided within a keyway 237, and the length of the connecting key 31 is less than the length of the keyway 237. The connecting key 31 can slide within the keyway 237, so that the connecting rod 232 can slide relative to the rotating wheel 3.

[0046] Further reference Figure 9Multiple evenly distributed rivets (not shown) are placed on the material belt 4. The material belt 4 is connected to the rotating wheel 3. Side ribs 42 are provided on both sides of the material belt 4. Multiple fixing grooves 41 are also provided on the material belt 4. The fixing grooves 41 are located between two side ribs 42, and protrusions 33 can pass through the fixing grooves 41 to connect the material belt 4 to the rotating wheel 3. The side ribs 42 abut against the stepped surfaces 34 on both sides of the rotating wheel 3. When the material belt 4 is connected to the rotating wheel 3, the side ribs 42 on both sides of the material belt 4 abut against the stepped surfaces 34 on both sides of the rotating wheel 3 to limit the movement of the material belt 4; simultaneously, the protrusions 33 of the rotating wheel 3 pass through the fixing grooves 41, ensuring that the material belt 4 is fixed to the rotating wheel 3 and does not move due to its own tension, gravity, or other external forces. When the rotating wheel 3 rotates, the protrusions 33 rotate with the rotating wheel 3 and move the material belt 4. The protrusion 33 moves in an arc and separates from the fixed groove 41. At the same time, the next protrusion 33 adjacent to this protrusion 33 moves in an arc and gradually enters the next fixed groove 41 adjacent to this fixed groove 41, so that the material belt 4 always stays connected to the roller 3 when it moves forward and will not be retracted by the tension force, gravity or other external forces of the material belt 4 itself.

[0047] Further reference Figure 10 A door opening / closing assembly 43 is also connected below the conveyor belt 4. The door opening / closing assembly 43 includes a support plate 431 connected to the conveyor belt 4; a connecting plate 432 is fixedly connected to the support plate 431; the connecting plate 432 can rotate around the pivot 433. The support plate 431 is provided with an arc-shaped surface 4311. When the support plate 431 is connected to the conveyor belt 4, the arc-shaped surface 4311 of the support plate 431 is positioned directly below the rotating wheel 3. An arc-shaped movement channel for the conveyor belt 4 to pass through is formed between the arc-shaped surface 4311 and the rotating wheel 3. The size of the arc-shaped movement channel is slightly larger than the cross-sectional size of the conveyor belt 4. The portion of the conveyor belt 4 placed in the arc-shaped movement channel is correspondingly curved to facilitate the smooth insertion of the protrusion 33 of the rotating wheel 3 into the fixing groove 41 of the conveyor belt 4. When it is necessary to separate the support plate 431 from the conveyor belt 4, the connecting plate 432 rotates around the rotating shaft 433, causing the support plate 431 to rotate and separate from the conveyor belt 4; at this time, the conveyor belt can be replaced or adjusted. Preferably, the width dimension of the support plate 431 is slightly smaller than the distance between the protrusions 33 on both sides of the rotating wheel 3. The support plate 431 is positioned between the protrusions 33 on both sides of the rotating wheel 3, and the protrusions 33 on both sides limit the position of the support plate 431, improving the positional accuracy of the support plate 431.

[0048] The mounting base 5 is provided with a first mounting groove 51 and a second mounting groove 52. The first mounting groove 51 houses the helical gear assembly 2. The second mounting groove 52 houses the rotating wheel 3. Preferably, bearings 35 are connected to both sides of the rotating wheel 3; one end of the bearing 35 abuts against the rotating wheel 3, and the other end abuts against the mounting base 5; so that the rotating wheel 3 can rotate smoothly relative to the mounting base 5, and the frictional force of the rotating wheel 3 can be reduced.

[0049] In use, the conveyor belt 4 is mounted on the rotary wheel 3, and the drive cylinder 1 is activated. The drive cylinder 1 pushes the drive gear disk 212 to move along the axis H of the rotary gear assembly 2. The drive gear disk 212 pushes the rotating gear disk 231 to move, at which time the rotating gear disk 231 moves and slides relative to the rotary wheel 3. When the drive inclined surface 218 of the drive gear disk 212 and the fixed inclined surface 213 are on the same inclined plane, the rotating gear disk 231 rotates obliquely relative to the drive inclined surface 218 and comes into contact with the fixed inclined surface 213. The drive cylinder 1 drives the drive gear disk 212 to reset, and the rotating gear disk 231 slides relative to the fixed inclined surface 213 and abuts against the drive inclined surface 218. During this process, the rotating teeth 234 of the rotating gear disk 231 rotate into the next tooth groove 216 and drive the rotary wheel 3 to rotate. The protrusion 33 of the rotary wheel 3 drives the conveyor belt 4 to move. The drive cylinder 1 continuously reciprocates, and each reciprocating motion of the drive cylinder 1 will cause the rotating tooth 234 to move to the next adjacent tooth groove 216, and cause the rotating tooth disk 231 to rotate by a fixed angle, thereby causing the wheel 3 connected to the material belt 4 to rotate by a fixed angle each time, ultimately realizing step feeding.

[0050] like Figure 11 As shown, the present invention also provides a feeding method for the above-mentioned riveting machine step feeding device, comprising the following steps:

[0051] Inclined surface fitting: The driving inclined surface 218 is fitted with the rotating inclined surface 233, and an elastic element 236 is connected to one end of the rotating gear disk 231;

[0052] Start drive cylinder: Start drive cylinder 1, drive cylinder 1 pushes drive gear disk 212 and rotating gear disk 231 to move, and squeezes elastic element 236;

[0053] First rotation of the rotating inclined plane: When the driving inclined plane 218 moves to the same inclined plane as the fixed inclined plane 213, the elastic element 236 rebounds and drives the rotating inclined plane 233 of the rotating gear disk 231 to rotate obliquely along the driving inclined plane 218 until it is in contact with the fixed inclined plane 213; the rotating gear disk 231 drives the rotating wheel 3 to rotate;

[0054] Second rotation of the inclined plane: The drive cylinder 1 drives the drive gear plate 212 to reset, the elastic element 236 further rebounds and drives the rotating inclined plane 233 of the rotating gear plate 231 to rotate obliquely along the fixed inclined plane 213 until it is in contact with the drive inclined plane 218; the rotating gear plate 231 drives the rotating wheel 3 to rotate;

[0055] Stepping cycle: Drive cylinder 1 to reciprocate, rotating inclined plane 233 to repeat the steps "first rotation of inclined plane" and "second rotation of inclined plane".

[0056] As described above, the present invention, through the cooperation of a drive cylinder 1 and a helical gear assembly 2 having a fixed inclined surface 213, a drive inclined surface 218, and a rotating inclined surface 233, converts the linear motion of the output shaft 11 of the drive cylinder 1 into the rotational motion of the rotating gear disk 231 in the helical gear assembly 2. Furthermore, a single reciprocating motion of the drive cylinder 1 can drive the rotating inclined surface 233, which is in contact with the drive inclined surface 218, to rotate until it is in contact with the next drive inclined surface 218. Thus, with one reciprocating motion of the drive cylinder 1, the rotating gear disk 231 rotates by a fixed angle, achieving the stepping motion of the rotating gear disk 231, and consequently, the stepping motion of the material belt 4. By setting the drive teeth 219 in the groove 216 formed by two adjacent fixed teeth 214, during the movement of the rotating gear 234, the drive teeth 219 and the fixed teeth 214 sequentially abut against the rotating gear 234 and restrict its movement, thereby improving the movement accuracy of the rotating gear 234. By combining the rotating wheel 3 with protrusion 33 and the material belt 4 with fixing groove 41, the retraction of the material belt 4 when it is connected to the rotating wheel 3 is effectively avoided.

[0057] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A stepping feeding device for a riveting machine, characterized in that, It includes a drive cylinder (1), a helical gear assembly (2) connected to the drive cylinder (1), and a rotating wheel (3); the drive cylinder (1) applies a pushing force to the helical gear assembly (2) along the axis (H) of the helical gear assembly (2); the helical gear assembly (2) is connected to an elastic element (236) that can drive the helical gear assembly (2) to reset, and the helical gear assembly (2) can convert the pushing force along the axis (H) of the helical gear assembly (2) into a rotational force along the axis (H) of the helical gear assembly (2) and cause the helical gear assembly (2) to rotate; the rotating wheel (3) is connected to the helical gear assembly (2) and can rotate with the helical gear assembly (2); the rotating wheel (3) is connected to a material belt (4) and can drive the material belt (4) to move; The helical gear assembly (2) includes a fixed gear disk (211) with multiple fixed inclined surfaces (213), a drive gear disk (212) with multiple drive inclined surfaces (218), and a rotating gear disk (231) with multiple rotating inclined surfaces (233); the rotating inclined surface (233) abuts against the drive inclined surface (218) or the fixed inclined surface (213) and can slide obliquely relative to the drive inclined surface (218) or the fixed inclined surface (213); The fixed gear disk (211) is provided with a plurality of fixed teeth (214), and the fixed inclined surface (213) is provided at the end of the fixed teeth (214) away from the driving cylinder (1); the driving gear disk (212) is provided with a plurality of driving teeth (219), and the driving inclined surface (218) is provided at the end of the driving teeth (219) away from the driving cylinder (1); the rotating gear disk (231) is provided with a plurality of rotating teeth (234), and the rotating inclined surface (233) is provided at the end of the rotating teeth (234) close to the driving cylinder (1); The plurality of fixed teeth (214) are evenly distributed, and a tooth groove (216) is formed between two adjacent fixed teeth (214). The driving tooth (219) is disposed in the tooth groove (216) and can slide relative to the fixed teeth (214) along the axis (H) direction of the helical gear assembly (2).

2. The riveting machine stepping feeding device according to claim 1, characterized in that, The rotating gear disk (231) is fixedly connected to a connecting rod (232); the connecting rod (232) is connected to the rotating wheel (3), and an elastic element (236) is connected to the end of the connecting rod (232) away from the driving gear disk (212).

3. The riveting machine stepping feeding device according to claim 1, characterized in that, The fixed inclined plane (213), the driving inclined plane (218), and the rotating inclined plane (233) are parallel to each other.

4. The riveting machine stepping feeding device according to claim 2, characterized in that, The connecting rod (232) is provided with a keyway (237), and the rotating wheel (3) is provided with a connecting key (31). The connecting key (31) is located in the keyway (237), and the length of the connecting key (31) is less than the length of the keyway (237).

5. The riveting machine stepping feeding device according to claim 1, characterized in that, The rotating wheel (3) is connected to the material belt (4). Multiple protrusions (33) are evenly distributed along the circumferential direction of the rotating wheel (3) on the outer wall (32) of the rotating wheel (3). Multiple fixing grooves (41) are provided on the material belt (4). The protrusions (33) pass through the fixing grooves (41).

6. The riveting machine stepping feeding device according to claim 5, characterized in that, The two ends of the wheel (3) are respectively provided with stepped surfaces (34), and the two sides of the material belt (4) are respectively provided with side ribs (42), and the side ribs (42) abut against the stepped surfaces (34).

7. The riveting machine stepping feeding device according to claim 1, characterized in that, The material belt (4) is also connected to a door opening and closing assembly (43), which includes a material support plate (431). The material support plate (431) is provided with an arc-shaped surface (4311). The arc-shaped surface (4311) and the rotating wheel (3) together form an arc-shaped movement channel for accommodating the material belt (4).

8. A feeding method for the stepping feeding device of a riveting machine as described in any one of claims 1-7, characterized in that, Includes the following steps: Inclined surface fitting: The driving inclined surface (218) is fitted with the rotating inclined surface (233), and an elastic element (236) is connected to one end of the rotating gear disk (231). Start drive cylinder: Start drive cylinder (1), drive cylinder (1) pushes drive gear plate (212) and rotating gear plate (231) to move and squeeze elastic element (236). First rotation of the rotating inclined plane: When the driving inclined plane (218) moves to the same inclined plane as the fixed inclined plane (213), the elastic element (236) rebounds and drives the rotating inclined plane (233) of the rotating gear disk (231) to rotate obliquely along the driving inclined plane (218) until it is in contact with the fixed inclined plane (213); the rotating gear disk (231) drives the rotating wheel (3) to rotate; Second rotation of the inclined plane: The drive cylinder (1) drives the drive gear plate (212) to reset, the elastic element (236) further rebounds and drives the rotating inclined plane (233) of the rotating gear plate (231) to rotate obliquely along the fixed inclined plane (213) until it fits with the drive inclined plane (218); the rotating gear plate (231) drives the wheel (3) to rotate; Stepping cycle: Drive cylinder (1) to reciprocate, rotating inclined plane (233) repeats the steps "first rotation of the rotating inclined plane" and "second rotation of the rotating inclined plane".

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