An arc baffle for a backlash elimination mechanism and a backlash elimination mechanism

Abstract

This utility model relates to the technical field of composite filter rod forming machines, and in particular to an arc-shaped baffle and a gap-eliminating mechanism for a gap-eliminating mechanism. The arc-shaped baffle includes a first arc surface and a second arc surface that are connected to each other. The first arc surface is disposed around the first gap-eliminating wheel, and a guide groove is provided on the first arc surface. The length direction of the guide groove extends along the arc direction of the first arc surface, and the groove wall of the guide groove slides against the first wheel tooth. The second arc surface is disposed around the second gap-eliminating wheel and slides against the filter rod located in the second receiving area. A first opening is provided at the first end of the second arc surface near the first arc surface. The first opening communicates with the guide groove to guide the filter rod into the guide groove. Through the design of the guide groove, this utility model can axially constrain the filter rod, correct it to be in the ideal conveying state, and prevent deviation or misalignment.

Description

Technical Field

[0001] This utility model relates to the technical field of composite filter rod forming machines, and in particular to an arc-shaped baffle and a gap-eliminating mechanism for use in gap-eliminating mechanisms. Background Technology

[0002] In existing cigarette manufacturing processes, filters are mostly made of two or more composite materials, and composite filter rod forming machines are the mainstream equipment for processing such composite filter rods. During the operation of a composite filter rod forming machine, the process involves cutting and compounding multiple filter rods. This process often utilizes a gap-reducing mechanism to eliminate gaps in multiple filter rod segments.

[0003] The utility model patent with authorization announcement number CN212787408U discloses a gap-reduction system for the production of ternary cavity filter rods, including: a first gap-reduction wheel, a second gap-reduction wheel, and a third gap-reduction wheel that mesh with each other, wherein the second gap-reduction wheel is located between the first and third gap-reduction wheels, and the line connecting the centers of the three wheels forms a triangle; each of the three gap-reduction wheels is provided with several teeth, and a wide accommodating cavity and a narrow accommodating cavity are formed between adjacent teeth, wherein the length of the wide accommodating cavity is greater than the length of the narrow accommodating cavity, and the two types of accommodating cavities are arranged alternately; the lengths of the wide accommodating cavity and the narrow accommodating cavity of the first, second, and third gap-reduction wheels decrease sequentially; and three baffles, the working surfaces of which are arc-shaped, are provided on the periphery of the three gap-reduction wheels and slide against the teeth of the three gap-reduction wheels respectively.

[0004] As can be seen, a baffle is provided around the periphery of the gap-eliminating wheel, which slides against the teeth of the gap-eliminating wheel to assist the wheel in conveying the filter rods. However, such a baffle design still has its limitations. Due to the deviation in the length of each filter rod segment during the gap-eliminating process, some filter rods will be offset or misaligned when transferred between two adjacent gap-eliminating wheels, affecting the subsequent composite molding effect. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an arc-shaped baffle and a gap-eliminating mechanism for a gap-eliminating mechanism. The arc-shaped baffle for the gap-eliminating mechanism can axially constrain the filter rod, correct it to be in the ideal conveying state, and prevent deviation or misalignment.

[0006] The technical solution of this utility model is to provide an arc-shaped baffle for a gap-eliminating mechanism. The gap-eliminating mechanism includes a first gap-eliminating wheel and a second gap-eliminating wheel that mesh with each other and rotate in opposite directions. The first gap-eliminating wheel has a plurality of first teeth evenly spaced circumferentially, and the area between two adjacent first teeth forms a first receiving area for accommodating a filter rod. The second gap-eliminating wheel has a plurality of second teeth evenly spaced circumferentially, and the area between two adjacent second teeth forms a second receiving area for accommodating a filter rod. The arc-shaped baffle for the gap-eliminating mechanism includes a first arc surface and a second arc surface that are connected to each other. The first arc surface is disposed around the first gap-eliminating wheel and has a guide groove. The length direction of the guide groove extends along the arc direction of the first arc surface, and the groove wall of the guide groove slides against the first teeth. The second arc surface is disposed around the second gap-eliminating wheel and slides against the filter rod located in the second receiving area. The first end of the second arc surface near the first arc surface has a first opening, which communicates with the guide groove to guide the filter rod into the guide groove.

[0007] Furthermore, the arc-shaped baffle for the gap-eliminating mechanism provided by this utility model may also have the following feature: it further includes a second opening at the second end of the second arc surface away from the first arc surface, the second opening slidingly abutting against the filter rod to guide the filter rod into the second receiving area.

[0008] Furthermore, the arc-shaped baffle for the gap-eliminating mechanism provided by this utility model may also have the following feature: the width of the first opening and the width of the second opening are both greater than the diameter of the filter rod.

[0009] Furthermore, the arc-shaped baffle for the backlash elimination mechanism provided by this utility model may also have the following feature: the highest point of the first arc surface is not higher than the wheel core of the first backlash elimination wheel.

[0010] Furthermore, the arc-shaped baffle for the backlash elimination mechanism provided by this utility model may also have the following feature: the highest point of the second arc surface is not lower than the wheel core of the second backlash elimination wheel.

[0011] Furthermore, the arc-shaped baffle for the gap-eliminating mechanism provided by this utility model may also have the following features: a first gap is provided between the bottom of the guide groove and the first gear tooth, and a second gap is provided between the second arc surface and the second gear tooth.

[0012] This utility model also provides a gap-eliminating mechanism, including the arc-shaped baffle for the gap-eliminating mechanism as described above.

[0013] Furthermore, the arc-shaped baffle for the backlash elimination mechanism provided by this utility model may also have the following features: it further includes a frame for mounting the first backlash elimination wheel and the second backlash elimination wheel, and the arc-shaped baffle for the backlash elimination mechanism is detachably connected to the frame.

[0014] Furthermore, the arc-shaped baffle for the backlash elimination mechanism provided by this utility model may also have the following features: the arc-shaped baffle for the backlash elimination mechanism is provided with at least one threaded hole, the frame is provided with a mounting hole corresponding to the threaded hole, and the arc-shaped baffle for the backlash elimination mechanism and the frame are connected by bolts passing through the threaded hole and the mounting hole in sequence.

[0015] Furthermore, the arc-shaped baffle for the gap-eliminating mechanism provided by this utility model may also have the following features: it further includes a conveying channel, on which a conveying groove for conveying filter rods is provided, and the conveying groove is connected to the second opening.

[0016] The beneficial effects of this utility model are as follows:

[0017] Compared to the unrestrained filter rod conveying that originally occurred at the meshing point of the two backlash-free wheels, the arc-shaped baffle provided in this application, through the design of the guide groove, uses its groove wall to generate axial constraint on the filter rod, corrects it to be in the ideal conveying state, prevents deviation or misalignment, and improves the effect of subsequent composite molding. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0019] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0020] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0021] Figure 3 This is a partial schematic diagram of the backlash elimination mechanism.

[0022] In the picture:

[0023] 1. First arc surface; 11. Guide groove; 2. Second arc surface; 21. First opening; 22. Second opening; 3. First clearance-eliminating wheel; 31. First gear tooth; 32. First receiving area; 4. Second clearance-eliminating wheel; 41. Second gear tooth; 42. Second receiving area; 5. Countersunk bolt; 6. Conveying channel; 7. Filter rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The gap-eliminating mechanism is used to eliminate gaps between multiple filter rods 7. It includes at least a first gap-eliminating wheel 3 and a second gap-eliminating wheel 4 that mesh with each other and rotate in opposite directions. The first gap-eliminating wheel 3 has multiple first teeth 31 evenly spaced on its circumference. The area between two adjacent first teeth 31 forms a first receiving area 32 for accommodating the filter rod 7. The second gap-eliminating wheel 4 has multiple second teeth 41 evenly spaced on its circumference. The area between two adjacent second teeth 41 forms a second receiving area 42 for accommodating the filter rod 7. The process of the first gap-eliminating wheel 3 and the second gap-eliminating wheel 4 conveying the filter rod 7 is as follows: The filter rod 7 is initially located in the second receiving area 42. As the first gap-eliminating wheel 3 and the second gap-eliminating wheel 4 rotate, the filter rod 7 is pushed by the second teeth 41 to the meshing point of the second gap-eliminating wheel 4 and the first gap-eliminating wheel 3. The first teeth 31 and the second teeth 41 mesh and connect, and together push the filter rod 7, causing it to enter the first receiving area 32. Due to the length deviation between each filter rod 7 (the length range is 8~70mm), some filter rods 7 are in a non-ideal conveying state when they are at the meshing point of the first gap-eliminating wheel 3 and the second gap-eliminating wheel 4. This causes them to shift or misalign during the process of entering the first accommodating area 32 from the second accommodating area 42, which affects the subsequent composite molding effect.

[0026] To solve the above problems, this utility model provides an arc-shaped baffle for a backlash elimination mechanism, the specific structure of which is as follows:

[0027] like Figures 1 to 3As shown, the arc-shaped baffle for the backlash elimination mechanism includes a first arc surface 1 and a second arc surface 2 connected to each other. The first arc surface 1 is located around the first backlash elimination wheel 3. A guide groove 11 is provided on the first arc surface 1. The length direction of the guide groove 11 extends along the arc direction of the first arc surface 1. The groove wall of the guide groove 11 slides against the first wheel tooth 31. The second arc surface 2 is located around the second backlash elimination wheel 4 and slides against the filter rod 7 located in the second receiving area 42. A first opening 21 is provided at the first end of the second arc surface 2 near the first arc surface 1. The first opening 21 communicates with the guide groove 11 to guide the filter rod 7 into the guide groove 11. In use, the filter rod 7 is initially located in the second receiving area 42. As the second backlash-eliminating wheel 4 rotates, the second gear tooth 41 pushes the filter rod 7 in the second receiving area 42 along the second arc surface 2 until the filter rod 7 enters the guide groove 11 through the first opening 21. As the first backlash-eliminating wheel 3 rotates, the first gear tooth 31 moves in the guide groove 11 until it meshes with the second gear tooth 41, jointly pushing the filter rod 7 into the first receiving area 32. Compared to the unconstrained conveying of the filter rod 7 that originally occurred at the meshing point of the two backlash-eliminating wheels, the groove wall of the guide groove 11 can provide axial constraint on the filter rod 7, correcting it to be in an ideal conveying state, preventing offset or misalignment, and improving the effect of subsequent composite molding.

[0028] In some embodiments, the arc-shaped baffle for the gap-reducing mechanism further includes a second opening 22 at the second end of the second arc surface 2 away from the first arc surface 1, the second opening 22 slidingly abutting against the filter rod 7 to guide the filter rod 7 into the second receiving area 42.

[0029] In some embodiments, since there is a slight tolerance in the diameter of each filter rod 7 (the diameter range is 4.8~7.2mm), in order to avoid the first opening 21 or the second opening 22 squeezing and damaging the filter rod 7, the width of the first opening 21 and the width of the second opening 22 are both greater than the diameter of the filter rod 7, and the width range is 7.5~8mm.

[0030] In some embodiments, it is preferable that the highest point of the first arc surface 1 is not higher than the wheel core of the first backlash-eliminating wheel 3. When the highest point of the first arc surface 1 is higher than the wheel core of the first backlash-eliminating wheel 3, and the guide groove 11 extends above the horizontal plane where the wheel core of the first backlash-eliminating wheel 3 is located, the filter rod 7 located in the upper half of the first backlash-eliminating wheel 3 will bend due to gravity or centrifugal force, and the constraint effectiveness of the guide groove 11 cannot be guaranteed.

[0031] In some embodiments, the highest point of the second arc surface 2 is preferably not lower than the wheel core of the second gap-reducing wheel 4, in order to ensure that the angle of the filter rod 7 when entering the first opening 21 is appropriate and to avoid squeezing damage to the filter rod 7.

[0032] Considering that the bottom of the guide groove 11 can slide against or have a certain gap with the first gear tooth 31, and the second arc surface 2 can slide against or have a certain gap with the second gear tooth 41, in some embodiments, in order to reduce the wear of the gear teeth, a first gap is provided between the bottom of the guide groove 11 and the first gear tooth 31, and a second gap is provided between the second arc surface 2 and the second gear tooth 41.

[0033] This utility model also provides a gap-eliminating mechanism, including the arc-shaped baffle for the gap-eliminating mechanism as described above.

[0034] In some embodiments, the backlash elimination mechanism further includes a frame for mounting the first backlash elimination wheel 3 and the second backlash elimination wheel 4, and the arc-shaped baffle of the backlash elimination mechanism is detachably connected to the frame.

[0035] As a further improvement to the above embodiments, the arc-shaped baffle is provided with at least one threaded hole, and the frame is provided with mounting holes corresponding to the threaded hole. The arc-shaped baffle and the frame are connected by countersunk bolts 5 that pass through the threaded hole and the mounting hole in sequence. This embodiment and the aforementioned embodiments can be implemented in combination. Based on the first gap between the bottom of the guide groove 11 and the first gear tooth 31, and the second gap between the second arc surface 2 and the second gear tooth 41, the detachable connection of the bolts allows for fine adjustment of the installation angle of the arc-shaped baffle. In use, the arc-shaped baffle can be installed with the wheel core of the second backlash-eliminating wheel 4 as the rotation reference, and can be installed tilted inward or outward by 0.5~2°. By finely adjusting the installation angle, it is beneficial to improve the pushing effect of the gear teeth.

[0036] In some embodiments, the gap-reducing mechanism further includes a conveying channel 6, which is provided with a conveying groove for conveying the filter rod 7, and the conveying groove is in communication with the second opening 22.

[0037] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0038] In the description of this invention, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0039] In the description of this invention, it should also be noted that the terms "center," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, unless otherwise stated, "a number" means two or more.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An arc-shaped baffle for a gap-eliminating mechanism, the gap-eliminating mechanism comprising a first gap-eliminating wheel (3) and a second gap-eliminating wheel (4) that mesh with each other and rotate in opposite directions, wherein the first gap-eliminating wheel (3) has a plurality of first gear teeth (31) evenly spaced in the circumferential direction, and the area between two adjacent first gear teeth (31) forms a first receiving area (32) for receiving a filter rod (7); the second gap-eliminating wheel (4) has a plurality of second gear teeth (41) evenly spaced in the circumferential direction, and the area between two adjacent second gear teeth (41) forms a second receiving area (42) for receiving a filter rod (7), characterized in that, The arc-shaped baffle for the gap elimination mechanism includes a first arc surface (1) and a second arc surface (2) connected to each other; the first arc surface (1) is disposed on the periphery of the first gap elimination wheel (3), and a guide groove (11) is provided on the first arc surface (1). The length direction of the guide groove (11) extends along the arc direction of the first arc surface (1), and the groove wall of the guide groove (11) slides against the first wheel tooth (31); the second arc surface (2) is disposed on the periphery of the second gap elimination wheel (4) and slides against the filter rod (7) located in the second accommodating area (42). The first end of the second arc surface (2) near the first arc surface (1) is provided with a first opening (21), and the first opening (21) communicates with the guide groove (11) to guide the filter rod (7) into the guide groove (11).

2. The arc-shaped baffle for the backlash elimination mechanism according to claim 1, characterized in that, It also includes a second opening (22) located at the second end of the second arc surface (2) away from the first arc surface (1), the second opening (22) slidingly abutting against the filter rod (7) to guide the filter rod (7) into the second receiving area (42).

3. The arc-shaped baffle for the backlash elimination mechanism according to claim 2, characterized in that, The width of the first opening (21) and the width of the second opening (22) are both greater than the diameter of the filter rod (7).

4. The arc-shaped baffle for the backlash elimination mechanism according to claim 1, characterized in that, The highest point of the first arc surface (1) is not higher than the wheel core of the first backlash-free wheel (3).

5. The arc-shaped baffle for the backlash elimination mechanism according to claim 1, characterized in that, The highest point of the second arc surface (2) is not lower than the wheel core of the second backlash-free wheel (4).

6. The arc-shaped baffle for the backlash elimination mechanism according to claim 1, characterized in that, A first gap is provided between the bottom of the guide groove (11) and the first gear tooth (31), and a second gap is provided between the second arc surface (2) and the second gear tooth (41).

7. A backlash elimination mechanism, characterized in that, Including the arc-shaped baffle for the backlash elimination mechanism as described in any one of claims 2-6.

8. The gap-eliminating mechanism according to claim 7, characterized in that, It also includes a frame for mounting the first backlash elimination wheel (3) and the second backlash elimination wheel (4), and the arc-shaped baffle for the backlash elimination mechanism is detachably connected to the frame.

9. The gap-eliminating mechanism according to claim 8, characterized in that, The arc-shaped baffle for the backlash elimination mechanism is provided with at least one threaded hole, and the frame is provided with a mounting hole corresponding to the threaded hole. The arc-shaped baffle for the backlash elimination mechanism and the frame are connected by bolts that pass through the threaded hole and the mounting hole in sequence.

10. The gap-eliminating mechanism according to claim 7, characterized in that, It also includes a conveying channel (6), which is provided with a conveying groove for conveying filter rods (7), and the conveying groove is connected to the second opening (22).

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