Automatic Retraction Mechanism of the Positioning Wheel and Positioning Post

Abstract

The present invention relates to an automatic retraction mechanism for a positioning wheel and a positioning post, which comprises a wall panel, a positioning shaft, a positioning wheel, a cam sleeve, a pressing wheel assembly, a tension spring assembly and a plurality of positioning rod assemblies. The cam sleeve is sleeved on the positioning shaft through a bearing, and the cam sleeve is fixedly connected to the wall panel through a cam pressing block. The positioning wheel is mounted on the positioning shaft through a retaining ring. A plurality of positioning rod holes are circumferentially and penetratingly formed on the outer circumference of the positioning wheel. The positioning rod assemblies are arranged on the inner circumference of the positioning wheel and correspond to the positioning rod holes. Each positioning rod assembly comprises a positioning rod, a copper sleeve and a compression spring. One end of the positioning rod close to the positioning shaft is connected with a screw bearing. The pressing wheel assembly comprises a pressing wheel, a pressing wheel mounting plate and a pressing wheel support rod. The tension spring assembly comprises a short spring pull rod, a tension spring, a spring pull rod and a spring fixing plate. This automatic retraction mechanism for the positioning wheel and the positioning post has accurate positioning, high transmission efficiency, will not damage the handle paper sheet, and has a high yield rate.

Description

Technical Field:

[0001] The present invention relates to the technical field of packaging bag processing equipment, and in particular to an automatic retraction mechanism for positioning wheels and positioning posts. Background Art:

[0002] The positioning wheel assembly is a common mechanism in the packaging paper bag production line, mainly used for positioning and conveying handle paper pieces.

[0003] In the past, eight fixed positioning rods were installed on the positioning wheel of the positioning wheel assembly. When the handle paper piece was conveyed to the pressing wheel by the belt, through speed control, the pressing wheel conveyed the handle paper piece to the positioning wheel, and the handle paper piece was sleeved on the positioning rod through the holes pre-drilled in the handle paper piece. Then the positioning wheel conveyed the handle paper piece backward. Since the positioning rods are fixed in this way, the protruding positioning rods are very likely to tear the positioning holes on the handle paper piece during the conveying and traction process, thus affecting the product quality and the finished product rate. Summary of the Invention:

[0004] In view of the above problems, the present invention provides an automatic retraction mechanism for positioning wheels and positioning posts with accurate positioning, high transmission efficiency, no damage to the handle paper piece, and high finished product rate.

[0005] The present invention is realized by the following technical solutions: An automatic retraction mechanism for positioning wheels and positioning posts, comprising a wall panel, a positioning shaft, a positioning wheel, a cam sleeve, a pressing wheel assembly, and a plurality of positioning rod assemblies.

[0006] The mechanism realizes the expansion and contraction of the positioning rods for positioning the handle paper piece through the cam sleeve, so that the following positioning rods can be flexibly switched between the positioning and transmission states, and damage to the handle paper piece is avoided on the premise of ensuring the positioning accuracy. The cam sleeve is sleeved on the positioning shaft through a bearing. The cam sleeve has a connecting portion and a cam portion. The cam sleeve is fixedly connected to the wall panel through the connecting portion and a cam pressing block. The positioning wheel is used in cooperation with the following positioning rod assemblies for positioning and transmitting the handle paper piece. The positioning wheel is installed on the positioning shaft through a retaining ring and can rotate outside the cam sleeve along with the positioning shaft. A plurality of positioning rod holes are circumferentially and penetratingly formed on the outer circumference of the positioning wheel.

[0007] Further, in order to avoid the handle ropes already fixed on the handle paper piece, a plurality of handle rope avoidance grooves are formed on the outer circumference of the positioning wheel, and the handle rope avoidance grooves are correspondingly formed on one side of the positioning rod holes.

[0008] The positioning rod assembly is arranged on the inner circumference of the positioning wheel and corresponds to the positioning rod hole. The positioning rod assembly includes a positioning rod, a copper sleeve, and a compression spring. The copper sleeve is in a hollow tubular shape and has a compression spring limiting platform inside. The copper sleeve is arranged in the positioning rod hole, the positioning rod is arranged in the copper sleeve and can extend out of the positioning rod hole. One end of the positioning rod close to the positioning shaft is connected with a screw bearing, and the screw bearing abuts against the outer circle of the cam part of the cam sleeve. The compression spring is arranged between the copper sleeve and the positioning rod. One end of the compression spring is connected with the positioning rod, and the other end abuts against the compression spring limiting platform.

[0009] Further, one end of the copper sleeve close to the positioning shaft is an open structure, and one end of the positioning rod close to the positioning shaft is an open structure.

[0010] The pressing wheel assembly is used to cooperate with the above-mentioned positioning wheel to realize the transmission of the handle paper sheet, and includes a pressing wheel, a pressing wheel mounting plate, and a pressing wheel support rod. One end of the pressing wheel mounting plate is hinged to the wall panel through the pressing wheel support rod, the pressing wheel is hinged to the other end of the pressing wheel mounting plate through a pressing wheel core shaft, and the pressing wheel can abut against the outer circle of the positioning wheel.

[0011] Further, in order to avoid the positioning rod, a positioning rod avoidance groove is provided on the outer circle of the pressing wheel corresponding to the position of the positioning rod.

[0012] In order to ensure that the pressing wheel always keeps close to the positioning wheel and improve the transmission efficiency, the automatic contraction mechanism of the positioning wheel positioning column further includes a tension spring assembly. The tension spring assembly includes a short spring pull rod, a tension spring, a spring pull rod, and a spring fixing plate. The spring fixing plate is fixedly connected to the wall panel. The spring pull rod is connected to the spring fixing plate and can be screwed in and out in the spring fixing plate. The short spring pull rod is arranged on the pressing wheel mounting plate. Both ends of the tension spring are respectively connected to the spring pull rod and the short spring pull rod. The pressing wheel mounting plate can drive the pressing wheel to press against the outer circle of the positioning wheel under the action of the tension spring.

[0013] In order to adjust the gap between the pressing wheel and the positioning wheel so that a certain gap is reserved between the working surfaces of the pressing wheel and the positioning wheel to facilitate better traction of the handle paper sheet, the automatic contraction mechanism of the positioning wheel positioning column further includes a pressing wheel adjusting mechanism. The pressing wheel adjusting mechanism includes a pressing wheel adjusting block and a screw. The pressing wheel adjusting block is fixedly installed on the wall panel. The screw is screwed into the pressing wheel mounting plate and both ends extend out of the pressing wheel mounting plate. One end of the screw abuts against the pressing wheel adjusting block. By screwing the screw in or out, the pressing wheel mounting plate can be driven to rotate around the pressing wheel support rod to adjust the angle of the pressing wheel mounting plate, thereby adjusting the gap between the pressing wheel and the positioning wheel.

[0014] In order to facilitate the adjustment of the time when the positioning rod extends, an angle adjustment hole is provided on the connecting part of the cam sleeve. The installation angle of the cam sleeve can be adjusted through the angle adjustment hole, so as to adjust the contact time of each point on the working surface of the cam part of the positioning rod assembly and the cam sleeve.

[0015] To improve the positioning accuracy, preferably, the positioning rod holes are evenly arranged circumferentially on the outer circle of the positioning wheel. Correspondingly, the positioning rod assemblies are evenly distributed on the circumference of the positioning wheel. Adaptively, the handle rope avoidance grooves are evenly distributed on the circumference of the positioning wheel.

[0016] The beneficial effects of the present invention are as follows: The positioning wheel positioning column automatic contraction mechanism realizes the flexible switching of the positioning rod for positioning the handle paper sheet between the positioning state and the transmission state by designing the cooperation of the cam sleeve with the positioning wheel and the retractable positioning rod assembly installed on the positioning wheel. On the premise of ensuring the positioning accuracy, it avoids damaging the handle paper sheet, greatly improves the product qualification rate, and thus improves the economy of the entire equipment; by providing an angle adjustment hole on the connecting part of the cam sleeve, the function of adjusting the extension time of the positioning rod is realized, improving the flexibility, adjustability and versatility of the mechanism; by designing the pressing wheel adjustment mechanism, the adjustment of the gap between the pressing wheel and the positioning wheel is realized, improving the stability and reliability of the transmission of the handle paper sheet; by optimizing the entire mechanism, a handle rope avoidance groove is provided on the positioning wheel, and a positioning rod avoidance groove is provided on the pressing wheel, making the entire mechanism more compact and reasonable; in addition, the positioning wheel positioning column automatic contraction mechanism is convenient to operate and has a high degree of automation. Brief Description of the Drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the positioning wheel positioning column automatic contraction mechanism of the present invention with the wallboard omitted;

[0018] Figure 2 It is the front view of the positioning wheel positioning column automatic contraction mechanism of the present invention;

[0019] Figure 3 It is the left view of the positioning wheel positioning column automatic contraction mechanism of the present invention;

[0020] Figure 4 It is the structural schematic diagram of the positioning wheel of the positioning wheel positioning column automatic contraction mechanism of the present invention;

[0021] Figure 5 It is the structural schematic diagram of the cam sleeve of the positioning wheel positioning column automatic contraction mechanism of the present invention;

[0022] Figures 6 - 7 It is the schematic diagram of the positioning rod assembly of the positioning wheel positioning column automatic contraction mechanism of the present invention. Detailed Description of the Invention:

[0023] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0024] As Figures 1 - 3 shown, an automatic retraction mechanism for a positioning wheel and a positioning post includes a wall panel 1, a positioning shaft 2, a positioning wheel 3, a cam sleeve 4, a pressing wheel assembly 5, a tension spring assembly 6, a plurality of positioning rod assemblies 7, and a pressing wheel adjustment mechanism 8. The cam sleeve 4 is sleeved on the positioning shaft 2 through a bearing. As Figure 5 shown, the cam sleeve 4 has a connecting portion 42 and a cam portion 43. An angle adjustment hole 41 is formed in the connecting portion 42 of the cam sleeve 4. The cam sleeve 4 is fixedly connected to the wall panel 1 through the connecting portion 42 and a cam pressing block 9.

[0025] The positioning wheel 3 is installed on the positioning shaft 2 through a retaining ring 10 and can rotate outside the cam sleeve 4 along with the positioning shaft 2. As Figure 4 shown, a plurality of positioning rod holes 31 are uniformly formed in the outer circumference of the positioning wheel 3 in the circumferential direction. A plurality of handle rope avoidance grooves 32 are uniformly formed in the outer circumference of the positioning wheel 3. The handle rope avoidance grooves 32 are correspondingly formed on one side of the positioning rod holes 31.

[0026] The positioning rod assemblies 7 are uniformly arranged on the inner circumference of the positioning wheel 3 and correspond to the positioning rod holes 31. As Figures 6 - 7 shown, the positioning rod assembly 7 includes a positioning rod 71, a copper sleeve 72, and a compression spring 73. The copper sleeve 72 is in a hollow tubular shape, with one end close to the positioning shaft 2 being an open structure and having a compression spring limiting platform 721 inside. The copper sleeve 72 is arranged in the positioning rod hole 31. The positioning rod 71 is arranged in the copper sleeve 72 and can extend out of the positioning rod hole 31. One end of the positioning rod 71 close to the positioning shaft 2 is an open structure and is connected with a screw bearing 74. The screw bearing 74 abuts against the outer circumference of the cam portion 43 of the cam sleeve 4. The compression spring 73 is arranged between the copper sleeve 72 and the positioning rod 71. One end of the compression spring 73 is connected to the positioning rod 71, and the other end abuts against the compression spring limiting platform 721.

[0027] The pressing wheel assembly 5 includes a pressing wheel 51, a pressing wheel mounting plate 52, and a pressing wheel support rod 53. One end of the pressing wheel mounting plate 52 is hinged to the wall panel 1 through the pressing wheel support rod 53. The pressing wheel 51 is hinged to the other end of the pressing wheel mounting plate 52 through a pressing wheel core shaft 54. A positioning rod avoidance groove 511 is formed on the outer circumference of the pressing wheel 51 corresponding to the position of the positioning rod 71. The pressing wheel 51 can abut against the outer circumference of the positioning wheel 3.

[0028] The tension spring assembly 6 includes a short spring pull rod 61, a tension spring 62, a spring pull rod 63, and a spring fixing plate 64. The spring fixing plate 64 is fixedly connected to the wall panel 1. The spring pull rod 63 is connected to the spring fixing plate 64 and can be screwed in and out within the spring fixing plate 64. The short spring pull rod 61 is arranged on the pressing wheel mounting plate 52. One end of the tension spring 62 is connected to the spring pull rod 63, and the other end is connected to the short spring pull rod 61. The pressing wheel mounting plate 52 can drive the pressing wheel 51 to press against the outer circumference of the positioning wheel 3 under the action of the tension spring 62.

[0029] The pressing wheel adjusting mechanism 8 includes a pressing wheel adjusting block 81 and a screw 82. The pressing wheel adjusting block 81 is fixedly installed on the wall panel 1. The screw 82 is screwed into the pressing wheel mounting plate 52 and extends out of the pressing wheel mounting plate 52 at both ends. One end of the screw 82 abuts against the pressing wheel adjusting block 81. By screwing the screw 82 in or out, the pressing wheel mounting plate 52 can be driven to rotate around the pressing wheel support rod 53, adjusting the angle of the pressing wheel mounting plate 52, thereby adjusting the gap between the pressing wheel 51 and the positioning wheel 3.

[0030] When using this positioning wheel positioning post automatic retraction mechanism to position and convey the handle paper sheet, first, adjust the spring pull rod 63 so that the tension spring 62 pulls the pressing wheel mounting plate 52 with an appropriate tension, so that the pressing wheel 51 is close to the positioning wheel 3. The screw 82 abuts against the pressing wheel adjusting block 81. Then adjust the screw 82 so that a certain gap is reserved between the working surfaces of the pressing wheel 51 and the positioning wheel 3 to facilitate better traction of the paper sheet.

[0031] The handle paper sheet is placed between the pressing wheel 51 and the positioning wheel 3 for positioning and conveying. During the operation of the positioning wheel 3, the screw bearing 74 on the positioning rod 71 in the positioning rod assembly 7 abuts against the cam working surface of the cam portion 43 under the action of the compression spring 73. Since the cam sleeve 4 is fixed, when the positioning wheel 3 rotates, the positioning rod 71 slides up and down under the action of the cam sleeve 4. When the handle paper sheet just contacts the positioning wheel 3, the positioning rod 71 is at the lowest point. As the positioning wheel 3 rotates, the positioning rod 71 extends out and cooperates with the hole on the handle paper sheet for positioning. After the positioning is completed, as the positioning wheel 3 rotates, the positioning rod 71 retracts, which can effectively avoid the pulling and damage of the positioning hole of the handle paper sheet when the positioning wheel 3 and the pressing wheel 51 cooperate to continue conveying the handle paper sheet later, ensuring the product yield.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0033] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "set up", "provided with", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Finally, it should be noted that the above embodiments are only specific embodiments of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or easily conceive of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An automatic retraction mechanism for a positioning wheel and a positioning column, characterized in that: It includes a wall panel, a positioning shaft, positioning wheels, a cam sleeve, a pressing wheel assembly and a number of positioning rod assemblies. The cam sleeve is sleeved on the positioning shaft through a bearing. The cam sleeve has a connecting portion and a cam portion. The cam sleeve is fixedly connected to the wall panel through the connecting portion and a cam pressing block. The positioning wheels are installed on the positioning shaft through retaining rings and can rotate outside the cam sleeve along with the positioning shaft. A number of positioning rod holes are circumferentially and throughly formed on the outer circumference of the positioning wheels. The positioning rod assemblies are arranged on the inner circumference of the positioning wheels and correspond to the positioning rod holes. Each positioning rod assembly includes a positioning rod, a copper sleeve and a compression spring. The copper sleeve is in a hollow tubular shape and has a compression spring limiting platform inside. The copper sleeve is arranged in the positioning rod hole. The positioning rod is arranged inside the copper sleeve and can extend out of the positioning rod hole. One end of the positioning rod close to the positioning shaft is connected with a screw bearing, and the screw bearing abuts against the outer circumference of the cam portion of the cam sleeve. The compression spring is arranged between the copper sleeve and the positioning rod, with one end connected to the positioning rod and the other end abutting against the compression spring limiting platform. The pressing wheel assembly includes a pressing wheel, a pressing wheel mounting plate and a pressing wheel support rod. One end of the pressing wheel mounting plate is hinged to the wall panel through the pressing wheel support rod. The pressing wheel is hinged to the other end of the pressing wheel mounting plate through a pressing wheel core shaft. The pressing wheel can abut against the outer circumference of the positioning wheel. It further includes a tension spring assembly. The tension spring assembly includes a short spring pull rod, a tension spring, a spring pull rod and a spring fixing plate. The spring fixing plate is fixedly connected to the wall panel. The spring pull rod is connected to the spring fixing plate and can be screwed in and out within the spring fixing plate. The spring pull rod is fixedly connected to the wall panel through the spring fixing plate. The short spring pull rod is arranged on the pressing wheel mounting plate. Both ends of the tension spring are respectively connected to the spring pull rod and the short spring pull rod. The pressing wheel mounting plate can drive the pressing wheel to press against the outer circumference of the positioning wheel under the action of the tension spring. It further includes a pressing wheel adjusting mechanism. The pressing wheel adjusting mechanism includes a pressing wheel adjusting block and a screw. The pressing wheel adjusting block is fixedly installed on the wall panel. The screw is screwed into the pressing wheel mounting plate and extends out of the pressing wheel mounting plate at both ends. One end of the screw abuts against the pressing wheel adjusting block. By screwing the screw in or out, the pressing wheel mounting plate can be driven to rotate around the pressing wheel support rod. A number of handle rope avoiding grooves are formed on the outer circumference of the positioning wheel, and the handle rope avoiding grooves are correspondingly formed on one side of the positioning rod holes.

2. The automatic retraction mechanism of the positioning wheel positioning post according to claim 1, wherein: An angle adjusting hole is formed on the connecting portion of the cam sleeve.

3. The automatic retraction mechanism of the positioning wheel and positioning post according to claim 1, characterized in that: A positioning rod avoiding groove is formed on the outer circumference of the pressing wheel corresponding to the position of the positioning rod.

4. The automatic retraction mechanism of the positioning wheel and positioning post according to claim 1, characterized in that: One end of the copper sleeve close to the positioning shaft is an open structure.

5. The automatic retraction mechanism of the positioning wheel positioning column according to claim 1, characterized in that: One end of the positioning rod close to the positioning shaft is an open structure.

6. The automatic retraction mechanism of the positioning wheel and positioning post according to claim 1, characterized in that: The positioning rod holes are evenly circumferentially formed on the outer circumference of the positioning wheel, and the positioning rod assemblies are evenly distributed on the circumference of the positioning wheel.

7. The automatic retraction mechanism of the positioning wheel and positioning post according to claim 1, characterized in that: The handle rope avoiding grooves are evenly distributed on the circumference of the positioning wheel.

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