Idle wheel structure

Abstract

The utility model belongs to the technical field of 3D printers, and particularly relates to an idle wheel structure which comprises an idle wheel body, bearings are arranged at the two ends of the inner wall of the idle wheel body respectively, a shaft sleeve is connected into the bearings in a sleeved mode, and a step is arranged at one end of the shaft sleeve. A first annular disc is detachably connected to one side of the idle wheel body through bolts, a second annular disc is detachably connected to the other side of the idle wheel body through bolts, pressing assemblies are arranged on the inner side face of the first annular disc and the inner side face of the second annular disc and used for pressing a conveying belt on the outer wall of the idle wheel body, and the situation that the stability of a transmission mechanism is affected due to the fact that the conveying belt falls off and loosens is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printers, and in particular relates to an idler wheel structure. Background Art

[0002] Currently, in the 3D printing industry, where FDM technology is used, the movement of the drive shaft is achieved through a motor. The motor drives the gears, the gears drive the conveyor belt, and the conveyor belt drives the idler wheel, forming a simple and complete transmission mechanism.

[0003] Chinese utility model patent CN216742676U discloses an idler pulley structure for preventing jamming. The idler pulley includes an idler pulley with bearings having an interference fit on both sides thereof. A sleeve is sleeved inside the bearing. A step is provided at one end of the sleeve. When the step contacts the bearing, the other end of the sleeve extends beyond the end of the idler pulley. The structure is simple and ingenious, and all the pressure applied by the tightening nut is transferred to the sleeve. This allows the bearing to rotate freely during use of the printer without jamming.

[0004] In the above technical solution, the conveyor belt drives the idler wheel to rotate, which may cause the conveyor belt to fall off and loosen, affecting the stability of the transmission mechanism, thereby causing inaccurate motion control during printing, and further affecting the dimensional accuracy and surface quality of the printed part. Utility Model Content

[0005] The purpose of the present invention is to provide an idler pulley structure to solve the above-mentioned technical problems, so as to avoid the problem of the conveyor belt falling off and loosening, which affects the stability of the transmission mechanism.

[0006] In view of this, the present invention provides an idler wheel structure, comprising: an idler wheel body, bearings are respectively provided at both ends of the inner wall of the idler wheel body, a shaft sleeve is sleeved inside the bearing, and a step is provided at one end of the shaft sleeve, and it is characterized in that a first annular disk is fixed to one side of the idler wheel body, and a second annular disk is detachably connected to the other side of the idler wheel body by bolts, and a clamping assembly is provided on the inner side surfaces of the first annular disk and the second annular disk, and the clamping assembly is used to clamp the conveyor belt on the outer wall of the idler wheel body.

[0007] In this technical solution, when the conveyor belt runs to the outer wall of the idler wheel body, the clamping assembly presses the conveyor belt so that the conveyor belt fits tightly on the idler wheel body, effectively avoiding the problem of the conveyor belt falling off and loosening during operation.

[0008] In the above technical solution, further, the clamping assembly includes: a fixed shaft, which is circumferentially arranged on the first annular disk and the second annular disk in an staggered manner, and a sliding sleeve is provided on the outer wall of the fixed shaft, and the sliding sleeve is fitted with the conveyor belt on the outer wall of the idler wheel body, and the sliding sleeve is rotatably connected to the fixed shaft.

[0009] In this technical solution, when the conveyor belt runs to the outer wall of the idler wheel body, the sleeve of the clamping assembly fits tightly against the conveyor belt. Due to the rotational connection between the sleeve and the fixed shaft, the movement of the conveyor belt will drive the sleeve to rotate, thereby avoiding affecting the transmission efficiency of the conveyor belt while clamping the conveyor belt.

[0010] In the above technical solution, further, the outer walls of the first annular disk and the second annular disk are both threadedly connected with a threaded column, the fixed shaft is provided with a threaded groove adapted to the threaded column at one end thereof, and the threaded column is provided with a knob at one end away from the threaded groove.

[0011] In this technical solution, after the first annular disk is fixed to the idler wheel body by bolts, and the threaded column corresponds to the threaded groove at one end of the fixed shaft, the threaded column is threaded into the fixed shaft by turning the knob, thereby fixing and limiting the fixed shaft, thereby improving the stability of the clamping assembly and preventing the fixed shaft from falling off the first annular disk and the second annular disk fixed at one end during long-term use.

[0012] In the above technical solution, further, there are three fixed shafts located on the first annular disk, two fixed shafts located on the second annular disk, and the five fixed shafts are staggered in a semicircular direction.

[0013] In this technical solution, when the conveyor belt is driving the idler wheel body, a part of it is semicircularly sleeved on the outer wall of the idler wheel body, and through the fixed shafts staggered on the first annular disk and the second annular disk, the conveyor belt is stably pressed on the left and right to prevent the conveyor belt from shifting during operation.

[0014] In the above technical solution, further, a rubber ring is provided on the inner wall of the idler wheel body, a swivel is provided on the inner side of the rubber ring, a groove is provided on the inner side of the swivel, and a plurality of balls are provided circumferentially on the groove surface, and the balls are in contact with the outer wall of the sleeve.

[0015] In this technical solution, the rubber ring has good shock-absorbing performance and can absorb the vibration generated during the operation of the idler pulley, while reducing the noise caused by the vibration. The uniform distribution and contact of the balls reduce the eccentricity of the sleeve caused by the unbalanced load.

[0016] The beneficial effects of the utility model are:

[0017] 1. When the conveyor belt runs to the outer wall of the idler wheel body, the clamping assembly presses the conveyor belt so that the conveyor belt fits tightly on the idler wheel body, effectively preventing the conveyor belt from falling off or loosening during operation.

[0018] 2. The rubber ring has good shock absorption performance and can absorb the vibration generated during the operation of the idler pulley, while reducing the noise caused by vibration. The uniform distribution and contact of the balls reduce the eccentricity of the sleeve caused by unbalanced load. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of an idler wheel structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of an idler wheel structure of the utility model;

[0021] Figure 3 This utility model is an idler wheel structure Figure 2 A magnified view of point A;

[0022] The marks in the figure are:

[0023] 1. Idle wheel body; 2. First annular disk; 3. Second annular disk; 4. Clamping assembly; 401. Fixed shaft; 402. Sleeve; 403. Threaded column; 404. Knob; 405. Threaded groove; 5. Bearing; 6. Bushing; 7. Bolt; 8. Rubber ring; 9. Swivel; 10. Groove; 11. Ball. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0026] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0027] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0028] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0029] Example 1:

[0030] Depend on Figure 1-3As shown, this embodiment provides an idler structure comprising: an idler body 1, bearings 5 are provided at both ends of the inner wall of the idler body 1, a sleeve 6 is sleeved inside the bearing 5, and a step is provided at one end of the sleeve 6. It is characterized in that a first annular disk 2 is fixed to one side of the idler body 1, and a second annular disk 3 is detachably connected to the other side of the idler body 1 via bolts 7. The inner sides of the first annular disk 2 and the second annular disk 3 are both provided with a clamping assembly 4, which is used to clamp the conveyor belt on the outer wall of the idler body 1. When the conveyor belt runs to the outer wall of the idler body 1, the clamping assembly 4 clamps the conveyor belt so that the conveyor belt fits tightly against the idler body 1, effectively preventing the conveyor belt from falling off or loosening during operation.

[0031] Furthermore, the compression assembly 4 includes a fixed shaft 401, which is circumferentially arranged alternately on the first annular disk 2 and the second annular disk 3. A sliding sleeve 402 is sleeved on the outer wall of the fixed shaft 401. The sliding sleeve 402 engages with the conveyor belt on the outer wall of the idler body 1 and is rotationally connected to the fixed shaft 401. When the conveyor belt runs to the outer wall of the idler body 1, the sliding sleeve 402 of the compression assembly 4 tightly engages the conveyor belt. Due to the rotational connection between the sliding sleeve 402 and the fixed shaft 401, the movement of the conveyor belt drives the sliding sleeve 402 to rotate, thereby preventing the transmission efficiency of the conveyor belt from being affected while compressing the conveyor belt.

[0032] Furthermore, the outer walls of the first annular disk 2 and the second annular disk 3 are both threadedly connected with a threaded column 403. The fixed shaft 401 has a threaded groove 405 on the end thereof adjacent to the threaded column 403, and a knob 404 on the end of the threaded column 403 away from the threaded groove 405. After the first annular disk 2 is fixed to the idler body 1 via the bolts 7, and the threaded column 403 corresponds to the threaded groove 405 on one end of the fixed shaft 401, the threaded column 403 is threaded into the fixed shaft 401 by turning the knob 404, thereby fixing and limiting the fixed shaft 401. This improves the stability of the clamping assembly 4 and prevents the fixed shaft 401 from falling off the first annular disk 2 or the second annular disk 3 fixed at one end during prolonged use.

[0033] Furthermore, there are three fixed shafts 401 located on the first annular disk 2 and two fixed shafts 401 located on the second annular disk 3. These five fixed shafts 401 are staggered in a semicircular arrangement. When the conveyor belt drives the idler pulley body 1, a portion of the belt is semicircularly sleeved around the outer wall of the idler pulley body 1. The staggered fixed shafts 401 on the first and second annular disks 2 and 3 provide stable left-right pressure on the conveyor belt, preventing it from shifting during operation.

[0034] Furthermore, the inner wall of the idler body 1 is provided with a rubber ring 8, the inner side of which is provided with a swivel 9. The inner side of the swivel 9 is provided with a groove 10. A plurality of balls 11 are circumferentially arranged around the groove 10, and the balls 11 are in contact with the outer wall of the sleeve 6. The rubber ring 8 has excellent shock-absorbing properties, absorbing vibrations generated during idler operation while reducing noise caused by such vibrations. The even distribution and contact of the balls 11 reduce eccentricity of the sleeve 6 caused by unbalanced loads.

[0035] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An idler wheel structure, comprising: An idler wheel body (1), wherein bearings (5) are respectively provided at both ends of the inner wall of the idler wheel body (1), a shaft sleeve (6) is sleeved inside the bearing (5), and a step is provided at one end of the shaft sleeve (6), and the idler wheel body (1) is characterized in that a first annular disk (2) is fixed to one side of the idler wheel body (1), and a second annular disk (3) is detachably connected to the other side of the idler wheel body (1) through bolts (7), and the inner sides of the first annular disk (2) and the second annular disk (3) are both provided with a clamping assembly (4), and the clamping assembly (4) is used to clamp the conveyor belt on the outer wall of the idler wheel body (1).

2. The idler wheel structure according to claim 1, characterized in that: The clamping assembly (4) comprises: a fixed shaft (401), the fixed shaft (401) being arranged on the first annular disk (2) and the second annular disk (3) in a staggered circumferential direction; a sliding sleeve (402) being sleeved on the outer wall of the fixed shaft (401); the sliding sleeve (402) being in contact with the conveyor belt on the outer wall of the idler wheel body (1); and the sliding sleeve (402) being rotatably connected to the fixed shaft (401).

3. The idler wheel structure according to claim 2, characterized in that: The outer walls of the first annular disk (2) and the second annular disk (3) are both threadedly connected with a threaded column (403); the fixed shaft (401) is provided with a threaded groove (405) adapted thereto at one end thereof close to the threaded column (403); and the threaded column (403) is provided with a knob (404) at one end thereof away from the threaded groove (405).

4. The idler wheel structure according to claim 3, characterized in that: There are three fixed shafts (401) located on the first annular disk (2), two fixed shafts (401) located on the second annular disk (3), and the five fixed shafts (401) are staggered in a semicircular direction.

5. The idler wheel structure according to claim 1, characterized in that: The inner wall of the idler wheel body (1) is further provided with a rubber ring (8), the inner side surface of the rubber ring (8) is provided with a rotating ring (9), the inner side surface of the rotating ring (9) is provided with a groove (10), and the groove (10) is circumferentially provided with a plurality of balls (11), and the balls (11) are in contact with the outer wall of the shaft sleeve (6).

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