Pitch changing device

Abstract

The utility model relates to the technical field of automatic machining, in particular to a pitch changing device. The pitch changing device comprises a base; the main shaft is connected to the base; the variable-pitch plate is rotationally connected to the main shaft, at least one variable-pitch hole is formed in the variable-pitch plate, the variable-pitch hole is obliquely formed, a first end and a second end which are opposite to each other are arranged on the variable-pitch hole in the radial direction, and the included angle between the direction, pointing to the second end, of the first end and the first direction is an obtuse angle; the at least one guide column is movably arranged in the variable pitch hole, and the guide column is connected to the base in a sliding manner; the at least two material loading pieces are respectively arranged on the main shaft and the guide column and are used for loading workpieces; and the driving piece is in driving connection with the variable-pitch plate, and the driving piece is used for driving the variable-pitch plate to rotate so that the variable-pitch plate can guide the guide columns to be close to or away from the main shaft through the variable-pitch holes, and then the distance between the two adjacent material loading pieces in the first direction is changed. The distance changing device can change the distance between the workpieces, and has the advantages of being simple in structure, convenient to operate, high in adjusting precision and high in operation speed.

Description

Technical Field

[0001] The present application relates to the field of automated processing technology, and in particular to a pitch-changing device. Background Art

[0002] In modern industrial production, precise positioning and spacing adjustment of workpieces are often required. For example, in fields such as electronics manufacturing and mechanical assembly, workpieces of different sizes need to be spaced according to specific process requirements during processing or assembly to accommodate different production processes and equipment.

[0003] Traditional spacing adjustment devices often suffer from complex structures, awkward operation, low adjustment accuracy, and slow adjustment speeds. Some devices may require complex mechanical structures and cumbersome operating procedures to adjust the spacing, which not only increases equipment cost and maintenance difficulties but also reduces production efficiency. Utility Model Content

[0004] In view of the above, it is necessary to propose a distance-changing device that can change the spacing between workpieces, which has the advantages of simple structure, convenient operation, high adjustment accuracy and fast operating speed.

[0005] The embodiment of the present application provides a pitch-changing device, comprising: a base extending along a first direction; a main shaft connected to the base and extending along a second direction perpendicular to the first direction; a pitch-changing plate rotatably connected to the main shaft and spaced apart from the base along the second direction, the pitch-changing plate being provided with at least one pitch-changing hole spaced apart from the main shaft along the first direction, the pitch-changing hole being inclined, the pitch-changing hole being radially provided with a first end and a second end opposite to each other, the angle between the direction from the first end to the second end and the first direction being an obtuse angle; at least one guide post, each of the guide posts being arranged along the The second direction extends and is movably arranged in the corresponding pitch variable hole, and the guide column is slidably connected to the base along the first direction; at least two material carriers, each of the material carriers is respectively arranged corresponding to the main shaft and each end of the guide column away from the base, and the material carrier is used to carry the workpiece; and a driving member, which is connected to the pitch variable plate, and the driving member is used to drive the pitch variable plate to rotate around the main shaft, so that the pitch variable plate guides the corresponding guide column to slide along the first direction through each pitch variable hole to approach or move away from the main shaft, thereby changing the distance between two adjacent material carriers along the first direction.

[0006] The above-mentioned pitch-changing device can carry workpieces via a material carrier, and can drive the pitch-changing plate to rotate about the main axis via a driving member. This in turn guides the guide post to slide directionally along the base via the pitch-changing hole, thereby causing the guide post to move closer to or farther from the main axis, thereby causing multiple material carriers to move closer to or farther from each other, thereby changing the spacing between the workpieces. The above-mentioned pitch-changing device has a simple structure and is easy to operate. When adjusting the spacing between the workpieces, the first and second ends of the pitch-changing hole can limit the distance the guide post moves, resulting in high adjustment accuracy. The pitch change can be completed by driving the pitch-changing plate to rotate via the driving member, resulting in high operating efficiency.

[0007] In some embodiments, when the number of the variable pitch holes, the guide columns and the material carriers is multiple, the multiple variable pitch holes are symmetrically arranged on opposite sides of the main shaft relative to the center of the main shaft, and the multiple variable pitch holes are spaced apart along the first direction, each of the guide columns is respectively corresponding to each of the variable pitch holes, and each of the material carriers is respectively corresponding to the main shaft and each of the guide columns at one end away from the base.

[0008] In some embodiments, the first ends of the plurality of variable pitch holes located on the same side of the main shaft are arranged at equal intervals, and the second ends of the plurality of variable pitch holes located on the same side of the main shaft are arranged in an arithmetic progression.

[0009] In some embodiments, the variable pitch holes are bar-shaped holes, and the first ends of a plurality of the variable pitch holes are located on the same straight line, and the second ends of a plurality of the variable pitch holes are located on the same straight line.

[0010] In some embodiments, the main shaft sleeve is provided with a bearing, the inner ring of the bearing is connected to the main shaft, and the outer ring of the bearing is connected to the pitch plate.

[0011] In some embodiments, a support protrusion is provided at one end of the main shaft close to the base, and the support protrusion abuts against the bearing to support the bearing.

[0012] In some embodiments, a slide rail extending along the first direction is provided on one side of the base close to the guide column, and a slider is provided on one end of the guide column close to the base. The slider is slidably connected to the slide rail to make the guide column and the base slidably connected.

[0013] In some embodiments, the base is connected to a support plate extending along a third direction, a first rotating member is provided on the support plate, a second rotating member is provided on the pitch variable plate, the body of the driving member is rotatably connected to the first rotating member, and the output end of the driving member is rotatably connected to the second rotating member; wherein, the third direction is perpendicular to both the first direction and the second direction.

[0014] In some embodiments, the material carrier includes a material carrier portion connected to the guide pillar and a plurality of positioning portions arranged around the material carrier portion, the material carrier portion is used to carry the workpiece, and the plurality of positioning portions are used to position the workpiece.

[0015] In some embodiments, each of the positioning portions is provided with a guide surface, and the guide surface is used to guide the workpiece to move to the loading portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of the pitch-changing device provided in an embodiment of the present application.

[0017] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the pitch-changing device shown.

[0018] Figure 3 for Figure 1 The schematic diagram of the structure of the pitch-changing device after pitch change is shown.

[0019] Explanation of the main component symbols: pitch changing device 100, base 10, slide rail 11, support plate 12, first rotating member 13, main shaft 20, connecting protrusion 21, bearing 22, support protrusion 23, pitch changing plate 30, pitch changing hole 31, first end 311, second end 312, second rotating member 32, guide column 40, slider 41, carrier 50, loading part 51, positioning part 52, guide surface 53, driving member 60, output end 61, workpiece 200. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0021] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, an electrical connection, or mutual communication; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] The following further describes the embodiments of the present application in conjunction with the accompanying drawings. To facilitate understanding and explanation of the embodiments of the present application, a three-dimensional coordinate system is established in some of the accompanying drawings, with the X-axis being the first direction, the Z-axis being the second direction, and the Y-axis being the third direction, with the X-axis, Y-axis, and Z-axis directions being perpendicular to each other.

[0024] See Figure 1 The present invention provides a pitch-changing device 100 for changing the spacing between workpieces 200. Workpieces 200 may be housings, midframes, or glass panels of electronic products such as mobile phones. The pitch-changing device 100 includes a base 10, a spindle 20, a pitch-changing plate 30, at least one guide post 40, at least two carriers 50, and a driver 60.

[0025] Specifically, see Figure 1 、 Figure 2 and Figure 3 The base 10 is extended along the X-axis direction. The base 10 can be a plate-shaped structure. The plate-shaped base 10 can provide stable support.

[0026] The main shaft 20 is connected to the base 10 and extends along the Z-axis direction. The main shaft 20 can be a cylindrical structure. The main shaft 20 and the base 10 can be fixedly connected by bolts, etc. In order to improve the stability of the connection between the main shaft 20 and the base 10, one end of the main shaft 20 connected to the base 10 can be provided with a connecting protrusion 21. The radius of the connecting protrusion 21 is greater than the radius of the main shaft 20 body. In this way, the stability of the main shaft 20 can be effectively improved.

[0027] The pitch-variable plate 30 is rotatably connected to the spindle 20 and spaced apart from the base 10 along the Z-axis. The pitch-variable plate 30 defines at least one pitch-variable hole 31 spaced apart from the spindle 20 along the X-axis. The pitch-variable hole 31 is inclined and radially defines a first end 311 and a second end 312 that are opposed to each other. The direction from the first end 311 to the second end 312 forms an obtuse angle with the positive direction of the X-axis, meaning the distance between the first end 311 and the spindle 20 is smaller than the distance between the second end 312 and the spindle 20. The pitch-variable plate 30 may be a plate-like structure, with the plane of the pitch-variable plate 30 being parallel to the plane of the base 10. The pitch-variable hole 31 may be one, two, four, or six, etc.

[0028] Each guide post 40 extends along the Z-axis and is movably disposed in a corresponding pitch-variable hole 31. The guide post 40 is slidably connected to the base 10 along the X-axis. The guide post 40 may be a cylindrical structure. It is understood that the number of guide posts 40 is the same as the number of pitch-variable holes 31, and may be one, two, four, six, etc., and each guide post 40 is correspondingly disposed in one pitch-variable hole 31.

[0029] At least two carriers 50 are provided, one corresponding to the spindle 20 and each guide post 40 at one end away from the base 10. The carriers 50 are used to carry the workpiece 200. The number of carriers 50 is one more than the number of guide posts 40, that is, one more than the number of pitch holes 31, and can be two, three, five, seven, etc. One carrier 50 is connected to the end of the spindle 20 away from the base 10, and the remaining carriers 50 are connected to the multiple guide posts 40 in a one-to-one correspondence.

[0030] The drive member 60 is drivably connected to the pitch-variable plate 30. The drive member 60 is used to drive the pitch-variable plate 30 to rotate about the spindle 20, so that the pitch-variable plate 30 guides the corresponding guide post 40 through each pitch-variable hole 31 to slide toward or away from the spindle 20 along the X-axis, thereby changing the distance between two adjacent carriers 50 along the X-axis. The drive member 60 can be a drive device such as a cylinder, and the output end 61 of the drive member 60 can be the output shaft of the cylinder. The drive member 60 can drive the pitch-variable plate 30 to rotate about the spindle 20, thereby pushing the guide post 40 against the wall of the pitch-variable hole 31 to slide along the X-axis, and the guide post 40 can then drive the carrier 50 to move along the X-axis.

[0031] It can be understood that when the driving member 60 drives the pitch-variable plate 30 to rotate, the first end 311 of the pitch-variable hole 31 abuts the guide post 40, and then the second end 312 of the pitch-variable hole 31 abuts the guide post 40, so that the guide post 40 moves away from the main shaft 20, thereby increasing the distance between the material carrier 50 connected to the main shaft 20 and the material carrier 50 connected to the guide post 40. Alternatively, the second end 312 of the pitch-variable hole 31 abuts the guide post 40, and then the first end 311 of the pitch-variable hole 31 abuts the guide post 40, so that the guide post 40 moves closer to the main shaft 20, thereby reducing the distance between the material carrier 50 connected to the main shaft 20 and the material carrier 50 connected to the guide post 40. The difference between the distance between the second end 312 of each pitch hole 31 and the main shaft 20 in the X-axis direction and the distance between the first end 311 and the main shaft 20 in the X-axis direction is the distance that the carrier 50 drives the workpiece 200 to move in the X-axis direction. Therefore, each time the driving member 60 drives the pitch plate 30 to move, the distance moved between the carriers 50 is constant, which can improve the adjustment accuracy of the pitch device 100.

[0032] The pitch-changing device 100 provided in the embodiment of the present application can carry the workpiece 200 through the material carrier 50, and can drive the pitch-changing plate 30 to rotate around the main shaft 20 through the driving member 60, thereby guiding the guide column 40 to slide directionally along the base 10 through the pitch-changing hole 31, so that the guide column 40 approaches or moves away from the main shaft 20, thereby causing multiple material carriers 50 to approach or move away from each other, thereby achieving the effect of changing the spacing between the workpieces 200. The pitch-changing device 100 provided in the embodiment of the present application has a simple structure and is easy to operate. When adjusting the spacing between the workpieces 200, the first end 311 and the second end 312 of the pitch-changing hole 31 can limit the distance that the guide column 40 moves, resulting in high adjustment accuracy. The pitch-changing can be completed by driving the pitch-changing plate 30 to rotate by the driving member 60, and the operation efficiency is high.

[0033] In some embodiments, see Figure 1 and Figure 2 When there are multiple pitch holes 31, guide posts 40, and material carriers 50, the multiple pitch holes 31 are symmetrically arranged on opposite sides of the main shaft 20 relative to the center of the main shaft 20, and the multiple pitch holes 31 are spaced apart along the X-axis direction. Each guide post 40 is corresponding to each pitch hole 31, and each material carrier 50 is corresponding to the end of the main shaft 20 and each guide post 40 away from the base 10. This symmetrical layout ensures that the force applied to the pitch changing device 100 is more uniform during the pitch changing process, thereby improving the stability of the entire pitch changing operation.

[0034] In this embodiment, the number of pitch holes 31 can be two, four, six, or the like. When there are two pitch holes 31, the two pitch holes 31 are centrally symmetrically arranged on opposite sides of the spindle 20. Two guide posts 40 are provided, each of which is disposed in a corresponding pitch hole 31. Three material carriers 50 are provided, one of which is connected to the spindle 20, and the remaining two material carriers 50 are respectively connected to the two guide posts 40. When there are four, six, or more pitch holes 31, the pitch holes 31 are divided into two groups, each group of pitch holes 31 being arranged on the same side of the spindle 20 and spaced apart along the X-axis. The number of guide posts 40 is the same as the number of pitch holes 31 and is respectively disposed in a corresponding pitch hole 31. The number of material carriers 50 is one more than the number of pitch holes 31, one of which is connected to the spindle 20, and the remaining plurality of material carriers 50 are respectively connected to corresponding guide posts 40.

[0035] In other embodiments, the pitch holes 31 may also be arranged in a non-center-symmetrical manner, such as multiple pitch holes 31 are arranged on the same side of the main shaft 20, or the number of pitch holes 31 located on opposite sides of the main shaft 20 is different.

[0036] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 The first ends 311 of the multiple pitch-changing holes 31 located on the same side of the main shaft 20 are arranged in equal intervals, while the second ends 312 of the multiple pitch-changing holes 31 located on the same side of the main shaft 20 are arranged in an arithmetic progression. In this embodiment, the number of pitch-changing holes 31 located on the same side of the main shaft 20 can be two, three, or the like. The equal intervals between the first ends 311 of the multiple pitch-changing holes 31 located on the same side of the main shaft 20 provide a stable starting reference for the pitch-changing operation. This equal interval arrangement ensures that the positions of the guide posts 40 are relatively uniform in the initial state, thereby ensuring the relative stability of the material carrier 50 at the initial stage. Furthermore, the arithmetic progression arrangement of the second ends 312 enables regular changes in the guide posts 40 during movement, making the distance change between the material carrier 50 connected to the guide posts 40 and the material carrier 50 connected to the main shaft 20 more precisely and controllable. Specific spacing adjustment requirements can be achieved by accurately calculating the difference in the arithmetic progression according to different production needs.

[0037] In some embodiments, see Figure 1 and Figure 2 The pitch holes 31 are strip-shaped, with the first ends 311 and second ends 312 of the multiple pitch holes 31 located on the same straight line. Strip-shaped pitch holes 31 provide a more direct linear pitch change path, suitable for situations requiring simpler and clearer pitch adjustment.

[0038] The first ends 311 and second ends 312 of the multiple pitch-changing holes 31 are located on the same straight line, ensuring a clearer and more stable trajectory for each guide post 40 during pitch change. Whether increasing or decreasing the distance between workpieces 200, the guide posts 40 maintain a clear reference line for their starting and final positions, ensuring accurate and consistent pitch change.

[0039] In some embodiments, see Figure 2 The main shaft 20 is provided with a bearing 22. The inner ring of the bearing 22 is connected to the main shaft 20, and the outer ring of the bearing 22 is connected to the pitch plate 30. In this way, the rolling action of the bearing 22 greatly reduces frictional resistance. Compared with the direct contact friction method, the use of the bearing 22 significantly reduces energy loss and improves the operating efficiency of the pitch device 100. During long-term operation, it can effectively save energy and reduce production costs. The bearing 22 can provide high-precision rotational support, ensuring that the rotation of the pitch plate 30 is accurate and smooth. The inner ring is tightly connected to the main shaft 20, and the outer ring cooperates well with the pitch plate 30, so that the pitch plate 30 will not experience unstable phenomena such as shaking and offset during rotation.

[0040] In some embodiments, see Figure 1 and Figure 2 A support protrusion 23 is provided at one end of the main shaft 20 close to the base 10, and the support protrusion 23 abuts against the bearing 22 to support the bearing 22. The support protrusion 23 is roughly a cylindrical structure, and the radius of the support protrusion 23 is larger than the radius of the main shaft 20. In this way, the support protrusion 23 can provide additional support force for the bearing 22, thereby enhancing the stability of the main shaft 20 during operation. By supporting the bearing 22 with the support protrusion 23, the force on the bearing 22 can be made more uniform, reducing the situation of local excessive force. This helps to extend the service life of the bearing 22 and reduce the maintenance cost of the equipment. When installing and debugging the pitch change device 100, the support protrusion 23 can be used as a reference point to facilitate the adjustment of the position of the bearing 22.

[0041] In some embodiments, see Figure 1 、 Figure 2 and Figure 3A slide rail 11 extending along the X-axis direction is provided on the side of the base 10 close to the guide column 40, and a slider 41 is provided on the end of the guide column 40 close to the base 10. The slider 41 is slidably connected to the slide rail 11 so that the guide column 40 is slidably connected to the base 10. Through the cooperation of the slider 41 and the slide rail 11, a clear track is provided for the movement of the guide column 40, ensuring that the guide column 40 can move smoothly along the predetermined direction during the pitch change process, avoiding the deviation, shaking and other instability of the guide column 40 during the movement, thereby ensuring the accuracy and reliability of the pitch change operation. The cooperation of the slide rail 11 and the slider 41 can greatly reduce the friction resistance between the guide column 40 and the base 10. Compared with sliding directly on the base 10, this method can reduce energy loss and improve the operating efficiency of the pitch change device 100. At the same time, reducing friction can also extend the service life of the guide column 40 and the base 10, and reduce the maintenance cost of the equipment.

[0042] In some embodiments, see Figure 1 、 Figure 2 and Figure 3 The base 10 is connected to a support plate 12 extending along the Y-axis direction, a first rotating member 13 is provided on the support plate 12, and a second rotating member 32 is provided on the pitch-changing plate 30. The body of the driving member 60 is rotatably connected to the first rotating member 13, and the output end 61 of the driving member 60 is rotatably connected to the second rotating member 32. The support plate 12 can be a strip-shaped structure for providing support for the driving member 60. The first rotating member 13 can be a hinge seat mounted on the support plate 12, and a rotating shaft is provided on the hinge seat. The body of the driving member 60 is connected to the rotating shaft to achieve rotation. The second rotating member 32 can also be a similar hinge structure, fixed on the pitch-changing plate 30, and connected to the output end 61 of the driving member 60, allowing the output end 61 of the driving member 60 to rotate relative to the pitch-changing plate 30. It can be understood that when the driving member 60 drives the pitch variable plate 30 to move, the pitch variable plate 30 rotates around the main shaft 20, and the position where the driving member 60 is connected to the pitch variable plate 30 makes an arc motion. Therefore, the output end 61 of the driving member 60 can rotate relative to the second rotating member 32 during the extension and retraction process to follow the pitch variable plate 30 to make an arc motion. At the same time, the body of the driving member 60 can also rotate relative to the first rotating member 13 so that the body of the driving member 60 can adjust the angle to the position in time.

[0043] In some embodiments, see Figure 1 and Figure 2The carrier 50 includes a carrier portion 51 connected to the guide post 40 and a plurality of positioning portions 52 disposed around the carrier portion 51. The carrier portion 51 is used to support the workpiece 200, and the positioning portions 52 are used to position the workpiece 200. The carrier portion 51 is generally a plate-shaped structure to provide stable support. The positioning portions 52 can be block-shaped and can be four, six, or eight in number. When the workpiece 200 is placed on the carrier portion 51, the positioning portions 52 surrounding the carrier portion 51 can position the workpiece 200, thereby improving the positioning accuracy of the workpiece 200.

[0044] In some embodiments, see Figure 2 Each positioning portion 52 is provided with a guide surface 53, which is used to guide the workpiece 200 to the loading portion 51. In this embodiment, the guide surface 53 is an inclined surface that gradually moves away from the loading portion 51 along the Z-axis. When an operator or automated equipment places the workpiece 200, the guide surface 53 serves as a guide, allowing the workpiece 200 to more accurately and quickly reach the correct position on the loading portion 51. This improves the efficiency and accuracy of workpiece 200 placement and reduces subsequent adjustments and errors caused by inaccurate placement.

[0045] The working process of the pitch-changing device 100 provided in the embodiment of the present application is roughly as follows:

[0046] First, the workpiece 200 is placed on the carrier 50 . The carrier portion 51 can carry the workpiece 200 , and the positioning portion 52 can position the workpiece 200 . Meanwhile, the guide surface 53 on the positioning portion 52 can guide the workpiece 200 to move to the carrier portion 51 more accurately.

[0047] Next, the driver 60 is activated. The main body of the driver 60 is connected to the support plate 12 of the base 10 via the first rotating member 13, allowing it to rotate relative to the support plate 12. The output end 61 of the driver 60 is connected to the pitch-variable plate 30 via the second rotating member 32, also allowing it to rotate relative to the pitch-variable plate 30. After the driver 60 starts operating, the output power drives the pitch-variable plate 30 to rotate about the main shaft 20 along the Z-axis.

[0048] As the pitch plate 30 rotates, the pitch hole 31 defined therein functions. The pitch hole 31 has a first end 311 and a second end 312 that oppose each other. The distance between the first end 311 and the spindle 20 is smaller than the distance between the second end 312 and the spindle 20. A guide post 40 is movably disposed within the pitch hole 31 and is slidably connected to the base 10 along the X-axis. As the pitch plate 30 rotates, the pitch hole 31 guides the guide post 40 toward or away from the spindle 20.

[0049] When the guide post 40, guided by the pitch hole 31, approaches the spindle 20, the carrier 50 connected to the guide post 40 moves closer to the carrier 50 connected to the spindle 20, thereby reducing the distance between two adjacent carriers 50 and adjusting the spacing between the workpieces 200. Conversely, when the guide post 40 moves away from the spindle 20, the distance between two adjacent carriers 50 increases, adjusting the spacing between the workpieces 200.

[0050] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and all variations that come within the meaning and range of equivalents of the claims are intended to be embraced herein.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A pitch-changing device, characterized in that: include: A base extending along a first direction; a main shaft connected to the base and extending along a second direction perpendicular to the first direction; a pitch-changing plate rotatably connected to the main shaft and spaced apart from the base along the second direction, the pitch-changing plate being provided with at least one pitch-changing hole spaced apart from the main shaft along the first direction, the pitch-changing hole being inclined, and having a first end and a second end opposite to each other in a radial direction, wherein an angle between a direction from the first end to the second end and the first direction is an obtuse angle; at least one guide post, each of the guide posts extending along the second direction and movably disposed in the corresponding pitch-changing hole, and the guide posts being slidably connected to the base along the first direction; At least two material carriers, each of which is respectively disposed on the spindle and one end of each guide post away from the base, and is used to carry a workpiece; and A driving member is connected to the pitch variable plate, and the driving member is used to drive the pitch variable plate to rotate around the main shaft, so that the pitch variable plate guides the corresponding guide column through each pitch variable hole to slide along the first direction to approach or move away from the main shaft, thereby changing the distance between two adjacent material carriers along the first direction.

2. The pitch-changing device according to claim 1, wherein: When there are multiple pitch-changing holes, guide posts and material carriers, the multiple pitch-changing holes are symmetrically arranged on opposite sides of the main shaft relative to the center of the main shaft, and the multiple pitch-changing holes are spaced apart along the first direction, each guide post is respectively arranged correspondingly to each pitch-changing hole, and each material carrier is respectively arranged correspondingly to the main shaft and each guide post at one end away from the base.

3. The pitch-changing device according to claim 2, wherein: The first ends of the plurality of pitch-variable holes located on the same side of the main shaft are arranged at equal intervals, and the second ends of the plurality of pitch-variable holes located on the same side of the main shaft are arranged in an arithmetic progression.

4. The pitch-changing device according to claim 2, wherein: The variable pitch holes are bar-shaped holes, and the first ends of the plurality of variable pitch holes are located on the same straight line, and the second ends of the plurality of variable pitch holes are located on the same straight line.

5. The pitch-changing device according to claim 1, wherein: The main shaft sleeve is provided with a bearing, the inner ring of the bearing is connected to the main shaft, and the outer ring of the bearing is connected to the pitch plate.

6. The pitch-changing device according to claim 5, characterized in that: A supporting protrusion is provided on one end of the main shaft close to the base, and the supporting protrusion abuts against the bearing for supporting the bearing.

7. The pitch-changing device according to claim 1, wherein: A slide rail extending along the first direction is provided on one side of the base close to the guide post, and a slider is provided on one end of the guide post close to the base. The slider is slidably connected to the slide rail to enable the guide post to be slidably connected to the base.

8. The pitch-changing device according to claim 1, wherein: The base is connected to a support plate extending along a third direction, a first rotating member is provided on the support plate, a second rotating member is provided on the pitch-changing plate, the body of the driving member is rotatably connected to the first rotating member, and the output end of the driving member is rotatably connected to the second rotating member; wherein, The third direction is perpendicular to both the first direction and the second direction.

9. The pitch-changing device according to claim 1, wherein: The material carrier includes a material carrier portion connected to the guide pillar and a plurality of positioning portions arranged around the material carrier portion. The material carrier portion is used to carry the workpiece, and the plurality of positioning portions are used to position the workpiece.

10. The pitch-changing device according to claim 9, characterized in that: Each of the positioning portions is provided with a guide surface, and the guide surface is used to guide the workpiece to move to the loading portion.

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