Chain conveying mechanism for stenter

Abstract

A chain is engaged with a chain wheel through cooperation of a first cooperation structure and a second cooperation structure, a bearing rolls in a groove, an outer side sliding part slides between a pressing strip and an outer side supporting face, an inner side sliding part slides on an inner side supporting face, a needle plate is arranged on the inner side of the chain, and the needle plate is arranged on the inner side of the chain. The chain is formed by connecting chain units end to end, each chain unit comprises at least two chain links, the rotating connection in each chain unit at least comprises a horizontal rotating connection, and the tail end of the last chain link of the previous chain unit is vertically and rotatably connected with the head end of the first chain link of the next chain unit. According to the chain conveying mechanism for the stenter, the chain links can rotate vertically and horizontally through the horizontal pin shafts and the vertical pin shafts, the service life of the chains is prolonged, the size of the stenter is reduced, the bearings and the pressing strips are arranged in the chains, stress supporting points are provided, the chains are prevented from rolling over, and the service life of the stenter is prolonged. The limiting baffle can prevent the chain from being disengaged from the chain wheel.

Description

Technical Field

[0001] The present invention relates to the field of chain transmission mechanisms, and particularly to a chain transmission mechanism for a stenter. Background Art

[0002] The chain transmission mechanism includes a chain, sprockets, and transmission components. The chain transmission consists of a driving sprocket, a driven sprocket mounted on parallel shafts, and a chain wound around the sprockets. During operation, the chain and sprockets cooperate with each other to transmit motion and power, thereby achieving the purpose of conveying materials.

[0003] Now, the chain transmission mechanism is applied to a stenter. The stenter is used to stretch and heat-set fabrics. Its basic working principle is that the fabric is clamped on the chain transmission mechanism and conveyed into an oven (heat-setting chamber) by the chain transmission mechanism. A heating system for heating the fabric is provided in the oven. After the fabric is heated and set in the oven, it is conveyed out of the oven by the chain transmission mechanism.

[0004] According to the change of the fabric processing steps, the fabric conveying process is divided into a fabric loading section and a setting section. The fabric is stretched by the chain transmission mechanism with gradually increasing spacing in the fabric loading section, and the fabric is heated and set by the oven in the setting section. During the stretching process of the fabric, large stresses will be generated, and the needle plate will be pulled by the stress, so the chain is prone to tipping over during operation, resulting in the inability to carry out the stretching work of the fabric.

[0005] The traditional chain is composed of inner chain links and outer chain links, and includes five small components: inner chain plates, outer chain plates, pins, sleeves, and rollers. Among them, the inner chain plates and sleeves are fixedly connected by interference fit to form inner chain links, the outer chain plates and pins are fixedly connected by interference fit to form outer chain links, and the rollers, sleeves, and pins are in clearance fit to achieve rotational connection between the inner chain links and the outer chain links in a plane perpendicular to the pins.

[0006] Taking a traditional chain with a straight line of pins parallel to the horizontal plane as an example, since the connection between the chain links is a vertical rotational connection relationship, the chain can be bent in the vertical plane, but it is difficult to be bent in the horizontal direction. Therefore, the traditional chain is suitable for application scenarios where the movement path of the chain is in a plane.

[0007] However, for application scenarios where the movement path of the chain exceeds a plane, the traditional chain is difficult to apply.

[0008] For example, in the double-layer stentering machine disclosed in the Chinese utility patent with announcement number CN219908143U, the chain is not only bent in the vertical plane to form a closed motion path, but also in the horizontal plane, based on the need to gradually widen the width of the cloth, the upper cloth section of the chain needs to be bent at an angle relative to the shaping section. When using a traditional chain, the bending of the upper cloth section relative to the shaping section can only be achieved through a long path based on the matching clearance between the sleeve and the pin shaft. This not only makes the length of the equipment passively longer, but also has the serious problem of abnormal chain wear. Summary of the invention

[0009] The directional description of the chain structure in the present invention is based on the state where a section of the chain is placed in a straight line and horizontally.

[0010] In the present invention, the inner side of the chain conveyor mechanism refers to the side close to the cloth, and the outer side refers to the side opposite thereto.

[0011] The purpose of the present invention is to provide a chain conveying mechanism for a tentering machine that can move in vertical and horizontal directions based on the existing chain conveying mechanism and based on the demand of reducing the volume of the tentering machine and improving the chain movement path so that it can be suitable for application scenarios beyond one plane.

[0012] A chain transmission mechanism for a tenter, comprising a chain, a sprocket and a track, characterized in that a first matching structure is provided on the chain, a second matching structure is provided on the sprocket, and the chain is meshed with the sprocket through the matching of the first matching structure and the second matching structure; The chain is provided with sliding parts on both sides and bearings on the upper and lower sides. The track is provided with a groove and a pressure strip, the bearing rolls in the groove, and support surfaces for supporting the sliding parts on both sides of the chain are respectively provided on both sides of the groove, the pressure strip is arranged above the outer support surface, the outer sliding part slides between the pressure strip and the outer support surface, and the inner sliding part slides on the inner support surface. A needle plate is provided on the inner side of the chain. The sliding parts are evenly spaced along the length direction of the chain. The bearings are evenly spaced along the length of the chain. The needle plates are evenly spaced along the length direction of the chain; The chain is composed of a plurality of chain units with the same structure connected end to end, wherein the chain unit includes at least two chain links, and each chain link in the chain unit is rotationally connected end to end. The rotational connection in the chain unit includes at least one horizontal rotational connection, and the tail end of the last chain link of the previous chain unit of two adjacent chain units is vertically rotationally connected to the head end of the first chain link of the next chain unit.

[0013] Furthermore, the chain unit includes two chain links. The head end of the first chain link is vertically rotatably connected to the tail end of the second chain link of the adjacent chain unit on the front side, and the tail end of the second chain link is vertically rotatably connected to the head end of the first chain link of the adjacent chain unit on the rear side.

[0014] Furthermore, a mating structure is provided on the first chain link or the second chain link.

[0015] Optionally, mating structures are respectively provided on the first chain link and the second chain link.

[0016] Furthermore, the chain unit includes three chain links. The head end of the first chain link is vertically rotatably connected to the tail end of the third chain link of the adjacent chain unit on the front side, the tail end of the first chain link is horizontally rotatably connected to the head end of the second chain link, the tail end of the second chain link is vertically rotatably connected to the head end of the third chain link, and the tail end of the third chain link is vertically rotatably connected to the head end of the first chain link of the adjacent chain unit on the rear side.

[0017] Furthermore, mating structures are respectively provided on the first chain link, the second chain link, and the third chain link.

[0018] Optionally, a mating structure is provided on the first chain link or the second chain link, and a mating structure is provided on the third chain link.

[0019] Furthermore, the chain link is of a plate-like structure and is horizontally arranged.

[0020] Furthermore, the chain link is of a plate-like structure and is horizontally arranged. The first chain link is a three-layer plate-like structure, which are respectively the first plate, the second plate, and the third plate from top to bottom. The second chain link is a single-layer plate-like structure, including a fourth plate. The tail end of the fourth plate is arranged between the head ends of the first plate and the third plate. The tail end of the second plate is hinged to the head end of the fourth plate of the adjacent chain unit on the rear side through a horizontally arranged horizontal pin shaft. The tail end of the fourth plate is rotatably connected to the head ends of the first plate and the third plate through a vertically arranged vertical pin shaft. The head end of the fourth plate is hinged to the tail end of the second plate of the adjacent chain unit on the front side through a horizontally arranged horizontal pin shaft.

[0021] Furthermore, a sleeve is fixedly installed at the tail end of the second plate, and a sleeve is fixedly installed at the head end of the fourth plate. The sleeve provided at the tail end of the second plate is coaxial with the sleeve provided at the head end of the fourth plate in the adjacent chain unit on the rear side. The sleeve provided at the head end of the fourth plate is coaxial with the sleeve provided at the tail end of the second plate in the adjacent chain unit on the front side. Horizontal pin shafts are provided in the coaxial sleeves.

[0022] To prevent the chain from disengaging when moving on the sprocket, the chain transmission mechanism includes a limiting component.

[0023] Further, the limiting component is a limiting baffle plate arranged on the sprocket. There are two pieces of the limiting baffle plate, which are respectively arranged on the inner side and the outer side of the sprocket. The second matching structure is arranged between the inner limiting baffle plate and the outer limiting baffle plate. Bearing limiting parts are respectively arranged on the outer side surface of the inner limiting baffle plate and the inner side surface of the outer limiting baffle plate, and the bearing is in contact with the bearing limiting part.

[0024] Optionally, the limiting component is a limiting baffle plate arranged on the chain. There are two pieces of the limiting baffle plate, which are respectively arranged on the inner side and the outer side of the chain. The first matching structure is arranged between the inner limiting baffle plate and the outer limiting baffle plate.

[0025] Further, the first matching structure is arranged to be arc-shaped, and the arc surface of the first matching structure meshes with the arc-shaped groove on the second matching structure.

[0026] Further, the pressing strip is made of graphite.

[0027] The beneficial effects of the present invention are as follows: The chain transmission mechanism for a stenter disclosed in this application can enable the chain links to rotate relatively vertically between each other through the horizontal pin shaft, and enable the chain links to rotate relatively horizontally between each other through the vertical pin shaft. Then the chain can be applicable to the application scenarios where the movement path exceeds one plane, and can be applicable to the working conditions with complex movement paths, avoiding abnormal wear caused by the unconventional use of the traditional chain due to work needs. It not only reduces the limitation of the movement path of the traditional chain, but also can effectively extend the service life of the chain. When the stenter stretches the cloth, the chain can axially stretch the cloth within a short working stroke, greatly reducing the volume of the stenter and saving the working space; bearings and pressing strips are provided in the chain, which not only provide a support point for the horizontal stress received by the chain, but also can effectively prevent the chain from tipping over due to the reaction force of the cloth during movement, ensuring the working stability of the stenter; the limiting baffle plates arranged on the chain or the sprocket can limit the movement path of the chain and prevent the chain from disengaging from the sprocket during work.

[0028] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described as follows. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings; Figure 1 It is a schematic diagram of the overall structure of a specific example of the chain transmission mechanism of the present invention; Figure 2 It is a schematic diagram of the structure of a specific example of the first type of chain in the chain transmission mechanism of the present invention; Figure 3 It is Figure 2 A partial enlarged structure diagram of; Figure 4 It is a schematic diagram of the structure of a specific example of the second type of chain in the chain transmission mechanism of the present invention; Figure 5 It is Figure 4 A partial enlarged structure diagram of; Figure 6 It is Figure 2 A top view of; Figure 7 It is a schematic diagram of the structure of a specific example of the first type of chain with bearings in the chain transmission mechanism of the present invention; Figure 8 It is a schematic diagram of the structure of the first type of chain in the chain transmission mechanism of the present invention in cooperation with the track; Figure 9 It is a schematic diagram of the structure of a sprocket with a limit baffle in the chain transmission mechanism of the present invention; Figure 10 It is Figure 9 A sectional structure diagram of; Figure 11 It is a schematic diagram of the structure of a specific example of a sprocket in the chain transmission mechanism of the present invention; Figure 12 It is a schematic diagram of the structure of the first matching structure with a limit baffle in the chain transmission mechanism of the present invention; In the figure: 101, the second link (A); 102, the first link (A); 104, the fourth plate (A); 105, the first plate (A); 106, the vertical pin shaft (A); 107, the first mating structure (A); 108, the second sleeve; 110, the bearing; 111, the second plate (A); 112, the third plate (A); 113, the second support; 114, the pressing member; 115, the needle plate; 116, the first sliding portion; 117, the strip; 118, the mounting plate; 119, the horizontal pin shaft (A); 120, the first sleeve; 121, the second sliding portion; 122, the first support; 201, the second link (B); 202, the first link (B); 203, the sleeve (B); 204, the vertical pin shaft (B); 205, the fourth plate (B); 206, the second plate (B); 207, the first plate (B); 208, the third plate (B); 209, the first mating structure (B); 220, the horizontal pin shaft (B); 300, the sprocket; 301, the chain; 302, the second mating structure; 303, the first limit baffle; 304, the bearing limit portion; 312, the second limit baffle. Detailed implementation mode

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The chain transmission mechanism of the present invention will be further described with reference to the drawings.

[0032] As Figure 1 shown, in this embodiment, the chain transmission mechanism described includes a chain 301 and a sprocket 300. The chain 301 meshes with the sprocket 300, and the chain 301 is driven by the sprocket 300.

[0033] A specific example of the first type of chain 301 is as Figure 2 and Figure 3 shown. A section of the chain in the figure is horizontally placed on a plane. The first type of chain 301 is composed of a plurality of chain units with the same structure connected end to end. The chain unit includes two links. The links are plate-shaped structures and are horizontally arranged, namely the second link (A) 101 and the first link (A) 102.

[0034] The head end of the second link (A) 101 is vertically rotatably connected to the tail end of the first link (A) 102 of the adjacent chain unit in the front side. The tail end of the second link (A) 101 is horizontally rotatably connected to the head end of the first link (A) 102. The tail end of the first link (A) 102 is vertically rotatably connected to the front end of the first link (A) 102 of the adjacent chain unit in the rear side.

[0035] The first link (A) 102 has a three-layer plate structure, which from top to bottom are the first plate (A) 105, the second plate (A) 111, and the third plate (A) 112 respectively.

[0036] The second link (A) 101 has a single-layer plate structure, including the fourth plate (A) 104. The tail end of the fourth plate (A) 104 is arranged between the head ends of the first plate (A) 105 and the third plate (A) 112.

[0037] The head end of the fourth plate (A) 104 is hinged to the tail end of the second plate (A) 111 of the adjacent front-side chain unit through a horizontally arranged horizontal pin shaft (A) 119. The tail end of the fourth plate (A) 104 is rotatably connected to the head ends of the first plate (A) 105 and the third plate (A) 112 through a vertically arranged vertical pin shaft (A) 106. The tail end of the second plate (A) 111 is hinged to the head end of the fourth plate (A) 104 of the adjacent rear-side chain unit through a horizontally arranged horizontal pin shaft (A) 119.

[0038] A mating structure (A) 107 is provided on the end faces of the first plate (A) 105 and the third plate (A) 112 away from the second plate (A) 111.

[0039] Mounting plates 118 are provided on the upper and lower end faces of the fourth plate (A) 104. The upper and lower two mounting plates 118 are symmetric about the position of the fourth plate (A) 104. A first mating structure (A) 107 is provided on the end faces of the mounting plates 118 away from the fourth plate (A) 104.

[0040] As Figure 6 shown, 104 and 111 are vertically rotatably connected. A first sleeve 120 is provided at the front end of 104, and a second sleeve 108 is provided at the rear end of 111. The first sleeve 120 and the second sleeve 108 are coaxial.

[0041] The horizontal pin shaft (A) 119 is arranged in the coaxial first sleeve 120 and second sleeve 108.

[0042] As Figure 7 shown, a bearing 110 is provided on the end faces of the first plate (A) 105 and the third plate (A) 112 away from the second plate (A) 111. A bearing 110 is provided on the end faces of the mounting plates 118 away from the fourth plate (A) 104.

[0043] The specific example of the second type of chain 301 is as Figure 4 and Figure 5As shown, a section of the chain in the figure is horizontally placed on a plane. The second chain 301 is composed of a plurality of chain units with the same structure connected end to end. The chain unit includes two chain links, and the chain links are plate-shaped structures and are horizontally arranged, namely the second link (B) 201 and the first link (B) 202.

[0044] The head end of the second link (B) 201 is vertically rotatably connected to the tail end of the first link (B) 202 of the adjacent chain unit on the front side. The tail end of the second link (B) 201 is horizontally rotatably connected to the head end of the first link (B) 202. The tail end of the first link (B) 202 is vertically rotatably connected to the front end of the second link (B) 201 of the adjacent chain unit on the rear side.

[0045] The first link (B) 202 is a three-layer plate-shaped structure, which are respectively the first plate piece (B) 207, the second plate piece (B) 206, and the third plate piece (B) 208 from top to bottom.

[0046] The second link (B) 201 is a single-layer plate-shaped structure, including a fourth plate piece (B) 205. The tail end of the fourth plate piece (B) 205 is arranged between the head ends of the first plate piece (B) 207 and the third plate piece (B) 208.

[0047] The head end of the fourth plate piece (B) 205 is hinged to the tail end of the second plate piece (B) 206 of the adjacent chain unit on the front side through a horizontally arranged horizontal pin shaft (B) 220. The tail end of the fourth plate piece (B) 205 is rotatably connected to the head ends of the first plate piece (B) 207 and the third plate piece (B) 208 through a vertically arranged vertical pin shaft (B) 204. The tail end of the second plate piece (B) 206 is hinged to the head end of the fourth plate piece (B) 205 of the adjacent chain unit on the rear side through a horizontally arranged horizontal pin shaft (B) 220.

[0048] A first mating structure (B) 209 is provided on the end faces of the first plate piece (B) 207 and the third plate piece (B) 208 away from the second plate piece (B) 206.

[0049] The first mating structure (B) 209 is set as an arc, and the arc surface of the first mating structure (B) 209 meshes with the second mating structure on the sprocket.

[0050] As Figure 8 shown, the chain 301 slides in the track. There are grooves on the track. A pressing member 114 is fixedly installed on the inner side part of the groove. The bearing 110 rolls in the groove, and the bearing 110 contacts the pressing surface of the pressing member 114. Support members are provided on both sides of the groove. The support member on the inner side is the first support member 122, and the support member on the outer side is the second support member 113.

[0051] The track is provided with a pressing strip 117, and the pressing strip 117 is arranged above the second support member 113.

[0052] A first sliding portion 116 is arranged on the inner side of the chain 301, and a second sliding portion 121 is arranged on the outer side of the chain 301. The first sliding portion 116 slides on the supporting surface of the first support member 122, and the second sliding portion 121 slides between the supporting surface of the second support member 113 and the pressing strip 117.

[0053] A needle plate 115 is fixedly installed on the first sliding portion 116.

[0054] One first sliding portion 116, one second sliding portion 121, and one needle plate 115 are provided on each link unit, and the first sliding portion 116, the second sliding portion 121, and the needle plate 115 are arranged at equal intervals along the length direction of the chain.

[0055] The pressing strip 117, the first support member 122, the second support member 113, and the pressing member 114 are all made of graphite.

[0056] In order to prevent the chain from disengaging when moving on the sprocket, the above-mentioned chain transmission mechanism includes a limiting component.

[0057] As Figure 9 and Figure 10 shown, the limiting component is a first limiting baffle 303 arranged on the sprocket 300. There are two first limiting baffles 303, which are respectively arranged on the inner side and the outer side of the sprocket 300. A second matching structure 302 is arranged on the sprocket 300, and the second matching structure 302 is arranged between the inner first limiting baffle 303 and the outer first limiting baffle 303.

[0058] Bearing limiting portions 304 are respectively arranged on the outer side surface of the inner first limiting baffle 303 and the inner side surface of the outer first limiting baffle 303.

[0059] The bearing limiting portion 304 is composed of a raised surface on the outer side surface of the inner first limiting baffle 303 and a raised surface on the inner side surface of the outer first limiting baffle 303, and the bearing is in contact with the bearing limiting portion 304.

[0060] As Figure 11 and Figure 12 shown, the limiting component is arranged on the second limiting baffle 312 on the chain 301. There are two second limiting baffles 312, which are respectively arranged on the inner side and the outer side of the chain 301.

[0061] A first matching structure (A) 107 or a first matching structure (B) 209 is arranged between the inner second limiting baffle 312 and the outer second limiting baffle 312.

[0062] The first mating structure (A) 107 is set to be arc-shaped, and the arc surface of the first mating structure (A) 107 meshes with the arc-shaped groove on the second mating structure 302.

[0063] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A chain conveying mechanism for a tenter frame, comprising a chain, a sprocket and a track, characterized in that: The chain is provided with a first matching structure, the sprocket is provided with a second matching structure, and the chain is meshed with the sprocket through the matching of the first matching structure and the second matching structure; The chain is provided with sliding parts on both sides and bearings on the upper and lower sides. The track is provided with a groove and a pressure strip, the bearing rolls in the groove, and support surfaces for supporting the sliding parts on both sides of the chain are respectively provided on both sides of the groove, the pressure strip is arranged above the outer support surface, the outer sliding part slides between the pressure strip and the outer support surface, and the inner sliding part slides on the inner support surface. A needle plate is provided on the inner side of the chain. The sliding parts are evenly spaced along the length direction of the chain. The bearings are evenly spaced along the length of the chain. The needle plates are evenly spaced along the length direction of the chain; The chain is composed of a plurality of chain units with the same structure connected end to end, wherein the chain unit includes at least two chain links, and each chain link in the chain unit is rotationally connected end to end. The rotational connection in the chain unit includes at least one horizontal rotational connection, and the tail end of the last chain link of the previous chain unit of two adjacent chain units is vertically rotationally connected to the head end of the first chain link of the next chain unit.

2. A chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The chain unit includes two links, the head end of the first link is vertically rotatably connected to the tail end of the second link of the front adjacent chain unit, and the tail end of the second link is vertically rotatably connected to the head end of the first link of the rear adjacent chain unit.

3. A chain conveying mechanism for a tentering machine according to claim 2, characterized in that: The first link and / or the second link is provided with a first matching structure.

4. A chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The chain unit includes three links, the head end of the first link is vertically rotationally connected to the tail end of the third link of the front adjacent chain unit, the tail end of the first link is horizontally rotationally connected to the head end of the second link, the tail end of the second link is vertically rotationally connected to the head end of the third link, and the tail end of the third link is vertically rotationally connected to the head end of the first link of the rear adjacent chain unit.

5. A chain conveying mechanism for a tentering machine according to claim 4, characterized in that: The first link, the second link and the third link are respectively provided with a first matching structure.

6. A chain conveying mechanism for a tentering machine according to claim 4, characterized in that: The first link or the second link is provided with a matching structure, and the third link is provided with a first matching structure.

7. A chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The chain links are plate-shaped structures and are arranged horizontally.

8. The chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The chain link is a plate-like structure and is arranged horizontally. The first chain link is a three-layer plate-like structure, which comprises a first plate, a second plate and a third plate from top to bottom. The second link is a single-layer plate structure, including a fourth plate, the tail end of the fourth plate is arranged between the first plate and the head end of the third plate, The tail end of the second plate is hinged to the head end of the fourth plate of the adjacent chain unit on the rear side through a horizontal pin, the tail end of the fourth plate is rotatably connected to the head ends of the first plate and the third plate through a vertical pin, and the head end of the fourth plate is hinged to the tail end of the second plate of the adjacent chain unit on the front side through a horizontal pin.

9. A chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The chain transmission mechanism includes a limit assembly, which is a limit baffle plate arranged on the sprocket. The limit baffle plate has two pieces, which are arranged on the inner side and the outer side of the sprocket respectively. The second matching structure is arranged between the inner limit baffle and the outer limit baffle. The outer side surface of the inner limit baffle and the inner side surface of the outer limit baffle are respectively provided with bearing limit parts, and the bearing is in contact with the bearing limit parts.

10. A chain conveying mechanism for a tentering machine according to claim 1, characterized in that: The limiting assembly is a limiting baffle plate arranged on the chain. The limiting baffle plate is provided with two pieces, and is respectively arranged on the inner side and the outer side of the chain. The first matching structure is arranged between the inner limit baffle and the outer limit baffle.

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