Driving chain capable of rotating in one direction

Abstract

The invention discloses a driving chain capable of rotating in a single direction, and relates to the technical field of driving chains, the driving chain comprises chain links, each chain link is composed of an inner chain plate and a pin cylinder, every two adjacent chain links are connected through an outer chain plate and a pin column, the end of each pin column is limited through a snap spring, the two ends of each outer chain plate are provided with protruding blocks, and the outer wall of each inner chain plate is provided with a limiting block; according to the driving chain capable of rotating in the single direction, the limiting blocks are arranged on the inner chain plates, the protruding blocks are arranged at the ends of the corresponding outer chain plates, the limiting blocks limit the inner chain plates and the outer chain plates to rotate in the single direction, and the rotating directions of the corresponding inner chain plates or outer chain plates on the same outer chain plate or inner chain plate are opposite. The inner chain plate and the outer chain plate can limit the rotating direction of the inner chain plate and the outer chain plate, so that the driving chain cannot arch, bend or sink in a pushing state, a gap between chain guide rails can be enlarged, and sealing of a heating chamber is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of drive chains, in particular to a drive chain that rotates in one direction. Background Art

[0002] In a box-type gas carbonitriding multi-purpose furnace, the product is first heated in the heating chamber, and then enters the front chamber, where the product is quenched. Figure 1 As shown, the movement between the two chambers and the product entering the heating chamber are driven by a rear drive mechanism. The existing drive mechanism is composed of a push-pull chain and a drive gear. The chain moves in two relative U-shaped tracks. Figure 11 In the left view, between the front room and the heating room, because of the heat-insulating closed door, the track between the two rooms is in a discontinuous state, with a certain gap. In order to maintain the stability of the chain (the chain turns and bends between the links), the gap will be very small, which makes the setting of the closed door very limited. For this reason, we propose a unidirectional rotating drive chain. Summary of the invention

[0003] The object of the present invention is to provide a unidirectional rotating drive chain to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a unidirectionally rotating drive chain, comprising a chain link, wherein the chain link is composed of an inner chain plate and a pin barrel, two adjacent chain links are connected by an outer chain plate and a pin column, and the end of the pin column is limited by a retaining spring, both ends of the outer chain plate are provided with a protrusion, and a limit block is provided on the outer wall of the inner chain plate, the limit block limits the inner chain plate and the outer chain plate from rotating in a single direction, and the corresponding inner chain plate or outer chain plate on the same outer chain plate or inner chain plate can rotate in opposite directions.

[0005] Preferably, the limiting blocks on the inner link plate are strip-shaped and are located on the side walls of the horizontal sections of the outer circumference of the inner link plate.

[0006] Preferably, an annular groove coaxial with the pin is provided on the inner wall of the outer link plate, and a through groove penetrating the two side walls of the outer link plate is provided at the protrusion, and a connecting groove connecting the annular groove and the through groove is also provided on the inner wall of the outer link plate, and the annular groove, the connecting groove and the through groove are all filled with a first carrier, and the first carrier is used to absorb lubricating oil, and a mounting plate is fixed to the outer wall of the outer link plate, and the end of the mounting plate is located on the moving path of the protrusion when the inner link plate or the outer link plate rotates, and the end of the mounting plate is in contact with the outer wall of the protrusion, and the inner wall of the mounting plate is provided with a second carrier, and the second carrier is soaked with lubricating oil, and when the first carrier and the second carrier contact, a capillary phenomenon is generated to transfer the lubricating oil.

[0007] Preferably, the inner side wall of the bump does not fit the outer wall of the inner link plate. A pressing block is slidably arranged in the communication groove. The pressing block abuts against the outer wall of the inner link plate. And a convex hull is arranged on the outer wall of the outer link plate on the movement track of the bump. The convex hull pushes the pressing block to press the first carrier part in the through groove. After the bump contacts the pressing block and presses the first carrier, the first carrier contacts the second carrier.

[0008] Preferably, the outer wall of the outer link plate is slidably connected with a mounting plate along the length direction. An arc-shaped guide rail is arranged at the end of the inner side wall of the mounting plate. Within the maximum rotation angle range of the link and the outer link plate at the driving gear, the bump does not contact the arc-shaped guide rail. After exceeding the range, the bump pushes the mounting plate to slide through the arc-shaped guide rail. A push block is fixed on the axial side wall of the end of the mounting plate. When the push block moves, it abuts against the open end of the circlip and makes the open end of the circlip expand away from the pin column in the back direction.

[0009] Preferably, the contact surface between the first carrier and the second carrier is a spherical surface.

[0010] Preferably, a convex ring is arranged on the inner side wall of the outer link plate for positioning the outer link plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: By arranging a limiting block on the inner link plate and a bump at the end of the corresponding outer link plate, the present invention can limit the rotation directions of the inner link plate and the outer link plate, so that the driving chain will not arch, bend or sink in the pushing state. Therefore, the gap between the chain guide rails can be enlarged, which is beneficial to the sealing of the heating chamber. By arranging the first carrier and the second carrier, the present invention enables them to contact and transfer lubricating oil when bending, which can not only avoid excessive waste of lubricating oil but also avoid noise and wear caused by insufficient lubricating oil. The push block arranged in the present invention can quickly disassemble the circlip under the action of the inner link plate and the outer link plate, which is convenient for replacing the accessories of the chain. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of the existing furnace body and chain; Figure 2 It is a schematic diagram of the state of the chain of the present invention; Figure 3 It is an unfolded schematic diagram of structures such as the link and the outer link plate; Figure 4 It is an axial sectional view of the pin; Figure 5 It is a schematic diagram of the inner side wall and the end structure of the mounting plate; Figure 6 It is a schematic diagram of the inner side wall structure of the outer link plate; Figure 7 For Figure 6Schematic enlarged view of the structure of area A therein; Figure 8 Schematic view of the overall structure of the link; Figure 9 Schematic views of the positions of the various structures on the movement trajectory of the bump; Figure 10 Schematic view of the edge line contact state of the contact surface between the first carrier and the second carrier; Figure 11 Schematic views of the end face structures of two types of chain guides.

[0013] In the figure: 1 - link; 101 - inner link plate; 102 - pin barrel; 2 - outer link plate; 3 - pin; 4 - circlip; 5 - bump; 6 - limit block; 7 - first carrier; 8 - mounting plate; 9 - second carrier; 10 - extrusion block; 11 - convex hull; 12 - arc guide; 13 - convex ring; 14 - push block; 201 - annular groove; 202 - through groove; 203 - connecting groove. Specific embodiments

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] Please refer to Figure 2 and Figure 3 , the present invention provides a technical solution: a driving chain that rotates in one direction. The chain is divided into three parts, namely link 1, outer link plate 2, pin 3, and circlip 4. Link 1 is composed of two inner link plates 101 and two pin barrels 102. The centers of the arcs at both ends of the two inner link plates 101 are connected to the pin barrels 102, and the pin barrels 102 are used to accommodate the pins 3; There are generally two ways of setting between the outer link plate 2 and the pin 3. One is that the outer link plate 2 and the pin 3 are separated, that is, the two outer link plates 2 connected to one end of the same link 1 are the same and symmetrically arranged, and the pin 3 exists independently. In this case, one end of the pin 3 can freely pass through the round hole on the outer link plate 2, and the outer link plate 2 on the other side is clamped by the circlip 4 (a corresponding slot for the circlip 4 is provided at the end of the pin), and the other end of the pin 3 is provided with a step to limit its passing through the round hole of the outer link plate 2. There is another way, that is, the pin 3 is integrated with one of the outer link plates 2; Refer to Figure 2 , Figure 3 and Figure 11, convex blocks 5 are provided at both ends of the outer link plate 2, and a limiting block 6 for restricting the convex block 5 is provided on the outer wall of the inner link plate 101. Here, the outer wall does not include the other side walls of the inner link plate 101 facing another inner link plate 101, such as Figure 3 shown, the limiting block 6 is fixed on the circumferential top wall of the inner link plate 101, and the limiting block 6 protrudes outward along the axial direction of the pin 3. In this state, the corresponding convex block 5 is arranged at the top of the end of the outer link plate 2, that is, as Figure 2 shown, in the horizontal state (i.e., the straightened state), only one-way rotation is possible between adjacent inner link plates 101 and outer link plates 2. Adjacent two link plates can only rotate upward around the connection point, that is, with the axis of the connecting pin 3 as the center, the outer link plate 2 connected to it rotates counterclockwise, while the inner link plate 101 connected to it rotates clockwise. Conversely, it is restricted by the limiting block 6 and the convex block 5, and is different from Figure 1 shown state, the gear turns the chain downward, while in this solution, as Figure 2 shown, one end of the chain is driven upward. In this state, during the pushing process of the output chain, the chain will not arch due to the bending at the pin 3 because the link 1 and the outer link plate 2 are not in a completely horizontal state, and it can also maintain stability without other restrictions, that is, the existing one is Figure 11 shown on the left side in, and this kind of guide rail is used to guide the chain. In the case of this solution, only the Figure 11 U-shaped method on the right side in is needed to support the chain, and because the chain can maintain a straight state, the distance between the tracks can be set larger in the area between the two chambers to facilitate the installation of a closed door for heat insulation; In addition, the limiting block 6 can also be fixed on the outer side wall of the inner link plate 101 (i.e., the side wall fitting the outer link plate 2). In this state, the position of the convex block 5 at the end of the outer link plate 2 also needs to be adjusted correspondingly. The limiting block 6 can also be set as a whole, and both ends limit different convex blocks 5.

[0016] Refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , two annular grooves 201 are opened on the inner side wall of the outer link plate 2. The two annular grooves 201 are located at the outer edge of the round hole, that is, they form a step with the round hole in the sectional view. Through grooves 202 penetrating both side walls along the axis of the snap pin 3 are opened on the convex block 5. The connecting groove 203 is used to connect the through groove 202 and the annular groove 201, and is opened on the inner wall of the outer link plate 2. The first carrier 7 is filled in the annular groove 201, the connecting groove 203 and the through groove 202. The first carrier 7 is a flexible material and can adsorb lubricating oil, preferably sponge. At this time, the first carrier 7 constitutes a storage body; A fixing mounting plate 8 is installed on the outer side wall of the outer link plate 2. The transverse two ends of the mounting plate 8 are located on the rotation path of the convex block 5, and a second carrier 9 is installed on the inner side wall of the end of the mounting plate 8. The second carrier 9 is as Figure 9 shown. When the chain rotates (rotates and bends at the gear), the convex block 5 will move towards the position where the second carrier 9 is located. The second carrier 9 is also used to adsorb or soak lubricating oil. The second carrier 9 extends to the mounting plate 8, and a cavity is opened in the mounting plate 8 to make the second carrier 9 have a larger volume, and lubricating oil is filled in the cavity. The second carrier 9 is soaked in the lubricating oil. Similarly, the second carrier 9 is preferably made of sponge; Specifically, in the state of pushing and pulling the chain, the link 1 and the outer link plate 2 in the straight state have no relative rotation. Because the chain is outside the furnace, each time the heating chamber is opened, the chain is indirectly heated, making the rotating pairs of the chain dry and lack lubrication. As a result, the chain will generate a large amount of noise when bending. Therefore, the chain needs to be frequently replenished with lubricating oil to reduce noise and wear. However, if too much lubricating oil is directly replenished at one time in the rotating pair, it is easy to overflow during rotation. Therefore, it can only be replenished at intervals. To solve the replenishment problem, a second carrier 9 for storing lubricating oil is provided on the outer link plate 2. The second carrier 9 is provided with a certain amount and can be used for a long time. Because the second carrier 9 is in a separate and relatively fixed mounting plate 8, it will not be affected by the rotation of the rotating pair. The first carrier 7 directly leads to the position where the rotating shaft of the rotating pair is located and can continuously replenish lubricating oil. Therefore, the first carrier 7 is set to be smaller, and because it is continuously replenished, the lubricating oil remaining on its carrier is also less. Therefore, when the chain reaches the gear and rotates, lubricating oil is transported to the first carrier 7 through the contact between the second carrier 9 and the first carrier 7. Because the lubricating oil content between the two carriers is different, the lubricating oil on the second carrier 9 will transfer to the first carrier 7, and because the rotation is a short process, the single delivery volume is also small, forming a process of multiple small replenishments, thus ensuring the low-noise operation of the chain and avoiding large wear.

[0017] Refer to Figure 6 、 Figure 7 and Figure 9 . In the thickness direction of the outer link plate 2, the thickness of the first carrier 7 is less than the depths of the annular groove 201, the through groove 202, and the connecting groove 203. An extrusion block 10 is provided on the side of the first carrier 7 close to the inner link plate 101. The extrusion block 10 is arranged according to the groove shape of the connecting groove 203 and extends to the end of the through groove 202. The thickness of the convex block 5 is lower than the thickness of the outer link plate 2, and the inner wall is cut to form an avoidance. A convex bump 11 is provided on the moving path of the convex block 5, and the convex bump 11 is located in front of the second carrier 9 on the moving path, as Figure 9As shown, when the protrusion 5 rotates with the outer link plate 2, the convex bump 11 first contacts the extrusion block 10, and the extrusion block 10 pushes the first carrier 7 to be compressed. Because compression will cause the lubricating oil on the carrier to be squeezed out, but in a small amount, the lubricating oil will be transferred to the part of the first carrier 7 located in the annular groove 201 to facilitate better lubrication. On the other hand, the compressed part of the first carrier 7 will contact the second carrier 9 when the protrusion 5 continues to move. At this time, the convex bump 11 begins to separate from the extrusion block 10, allowing the extrusion block 10 to recover, thereby generating suction, and better absorbing the lubricating oil from the second carrier 9.

[0018] See also Figure 3 and Figure 5 , on the basis of the embodiment in which only the protrusion 5 and the limit block 6 are provided, a transverse guide slide is provided on the outer surface of the outer link plate 2, and the mounting plate 8 is slidably installed through the guide slide, at least one push block 14 is fixed at both ends of the mounting plate 8, and the side wall of the push block 14 along the length direction of the mounting plate 8 is inclined. When the mounting plate 8 moves, the inclined side wall of the push block 14 contacts one end or both ends of the open end of the retaining spring 4, and as the movement continues, the retaining spring 4 is stretched open and pushed toward the non-opening end, thereby releasing the limit of the retaining spring 4, and a mounting body is fixed on the inner wall of the mounting plate 8, and the upper and lower sides of the mounting body are slidably connected with the guide slide, and arc guide rails 12 are provided on the left and right sides of the mounting body, and the arc guide rails 12 contact and slide with the protrusion 5; When the chain is in a normal state, that is, when the chain moves to the gear and bends, the lug 5 cannot reach the position of the arc guide rail 12 and contacts it (in this state, the chain link 1 and the outer link plate 2 have a maximum rotation angle limit). When the chain needs to be disassembled, the chain link 1 and the outer link plate 2 can be rotated and the maximum rotation angle can be exceeded. Therefore, the lug 5 contacts the arc guide rail 12 and pushes the arc guide rail 12 to move, and finally the push block 14 pushes the retaining spring 4 away, which is convenient for the quick removal of the chain. Because the retaining spring 4 is generally in the form of a thin sheet, it is not convenient to operate during disassembly.

[0019] Different from the previous embodiment, in this embodiment, both the second carrier 9 and the push block 14 are provided on the mounting plate 8, and the two solutions are integrated into one.

[0020] See also Figure 10 The edge line of the cross section of the contact surface of the first carrier 7 and the second carrier 9 is arc-shaped to avoid horizontal friction and wrinkle damage when the two are in contact. The spherical surface can generate downward pressure for compression. On the other hand, the spherical surface can produce a larger contact surface relative to the horizontally set plane.

[0021] See also Figure 4 and Figure 6, is the cross-section of the rotation axis of the revolute pair (i.e., the axis cross-section of the pin 3). In this state, the inner surface of the outer link plate 2 is provided with a convex ring 13, and the convex ring 13 is used for positioning the outer link plate 2. It is also possible not to provide the convex ring 13 and directly use the pin 3 for positioning.

[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A unidirectionally rotating drive chain, comprising a chain link (1), wherein the chain link (1) is composed of an inner chain plate (101) and a pin barrel (102), two adjacent chain links (1) are connected by an outer chain plate (2) and a pin column (3), and the end of the pin column (3) is limited by a retaining spring (4), characterized in that: Both ends of the outer link plate (2) are provided with protrusions (5), and a limit block (6) is provided on the outer wall of the inner link plate (101). In a straightened state, the limit block (6) limits the inner link plate (101) and the outer link plate (2) from rotating in a single direction, and the corresponding inner link plates (101) or outer link plates (2) on the same outer link plate (2) or inner link plate (101) can rotate in opposite directions.

2. A unidirectional rotating drive chain according to claim 1, characterized in that: The limiting block (6) on the inner link plate (101) is strip-shaped and is located on the side wall of the horizontal section in the outer circumferential direction of the inner link plate (101).

3. A unidirectional rotating drive chain according to claim 1, characterized in that: An annular groove (201) coaxial with the pin (3) is provided on the inner side wall of the outer link plate (2), and a through groove (202) penetrating through the two side walls of the outer link plate (2) is provided at the protrusion (5). A connecting groove (203) connecting the annular groove (201) and the through groove (202) is also provided on the inner wall of the outer link plate (2). The annular groove (201), the connecting groove (203) and the through groove (202) are all filled with a first carrier (7). The first carrier (7) is used to absorb Lubricating oil is attached, a mounting plate (8) is fixed to the outer side wall of the outer link plate (2), the end of the mounting plate (8) is located on the moving path of the protrusion (5) when the inner link plate (101) or the outer link plate (2) rotates, and the end of the mounting plate (8) is in contact with the outer side wall of the protrusion (5), and the inner wall of the mounting plate (8) is provided with a second carrier (9), and the second carrier (9) is soaked with lubricating oil. When the first carrier (7) and the second carrier (9) are in contact, a capillary phenomenon is generated to transfer the lubricating oil.

4. A unidirectional rotating drive chain according to claim 3, characterized in that: The inner side wall of the protrusion (5) does not fit the outer wall of the inner link plate (101); an extrusion block (10) is slidably provided in the connecting groove (202); the extrusion block (10) contacts the outer wall of the inner link plate (101); and a convex bulge (11) is provided on the outer wall of the outer link plate (2) on the movement track of the protrusion (5); the convex bulge (11) pushes the extrusion block (10) to extrude the portion of the first carrier (7) located in the connecting groove (202); after the protrusion (5) contacts the extrusion block (10) to extrude the first carrier (7), the first carrier (7) contacts the second carrier (9).

5. A unidirectional rotating drive chain according to claim 1, 2 or 3, characterized in that: The outer wall of the outer link plate (2) is slidably connected to the mounting plate (8) along the length direction, and the end of the inner wall side of the mounting plate (8) is provided with an arc guide rail (12). When the chain link (1) and the outer link plate (2) are within the maximum rotation angle range at the driving gear, the protrusion (5) does not contact the arc guide rail (12). When the range is exceeded, the protrusion (5) pushes the mounting plate (8) to slide through the arc guide rail (12). A push block (14) is fixed to the axial side wall of the end of the mounting plate (8). When the push block (14) moves, it contacts the open end of the retaining spring (4) and causes the open end of the retaining spring (4) to unfold away from the pin (3).

6. A unidirectional rotating drive chain according to claim 3, characterized in that: The contact surface between the first carrier (7) and the second carrier (9) is a spherical surface.

7. A unidirectional rotating drive chain according to claim 1, characterized in that: The inner side wall of the outer link plate (2) is provided with a convex ring (13), and the convex ring (13) is used for positioning the outer link plate (2).

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