A full-electric injection molding machine transmission belt tension adjusting device

Abstract

The utility model provides a kind of full electric injection molding machine transmission belt tensioning adjusting device, it is related to transmission adjusting technical field, including running main body and transmission belt, the inner wall of running main body is equipped with dynamic roller, the circumferential surface of dynamic roller close to end portion is equipped with limiting ring groove.The utility model realizes the cooperation of the convex strip of transmission belt side and the limiting ring groove of dynamic roller, limits the possible deviation of transmission belt in movement, prevents abnormal deviation, reduces the contact area of limiting ring groove inner wall and convex strip surface simultaneously, prevents the abrasion caused by larger contact area, and by the contact mode of convex strip and limiting ring groove, limiting ring groove can not directly contact with the main body of transmission belt, especially the convex strip is arranged on one side of transmission belt, the side frame of equipment main body can shield convex strip, ensure the maximum contact area of transmission belt without affecting the carrying effect of transmission belt, so as to better protect transmission belt, achieve the effect of improving the service life of transmission belt.

Description

Technical Field

[0001] This utility model relates to the field of transmission adjustment technology, and in particular to a tension adjustment device for a transmission belt of an all-electric injection molding machine. Background Technology

[0002] The tension adjustment requirements for injection molding machine drive belts stem from various factors, including operating conditions, transmission accuracy, and equipment stability. Belt drives are driven by friction; insufficient tension reduces the contact pressure between the belt and the drive pulley, potentially leading to slippage. Especially under the frequent start-stop conditions of injection molding machines, slippage directly reduces transmission efficiency and can even cause delays or malfunctions.

[0003] A search revealed that utility model patent CN220097449U discloses a belt tensioning structure that can adaptively press down according to the belt tension, ensuring belt tension and guaranteeing stable and reliable material conveying. It includes a vertical support frame with a crossbeam and two side columns, each with a vertical guide groove; a pressure wheel with a mounting shaft and a pressure wheel body, the pressure wheel body being mounted on the mounting shaft and rotatably mounted, with both ends of the mounting shaft protruding from the corresponding end faces of the pressure wheel body; a pair of guide posts; and a pair of linear springs. Each guide post is fixedly mounted within a vertical guide groove, with both ends of the mounting shaft mounted on the guide posts and movable vertically. Each linear spring is mounted on the upper part of a corresponding guide post, with the upper end of the linear spring abutting the upper wall of the corresponding vertical guide groove and the lower end of the linear spring abutting the corresponding upper surface of the mounting shaft. The lower arc surface of the pressure wheel body is used to press against the surface of the belt.

[0004] In the structure disclosed above, the belt is restricted by the side convex ring, which greatly increases the contact area between the side convex ring and the belt. Especially when the belt deviates in direction, it is easy to generate a large friction force, which leads to abnormal wear of the belt and reduces the service life of the belt. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tension adjustment device for the transmission belt of an all-electric injection molding machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tension adjustment device for a transmission belt of an all-electric injection molding machine, comprising a running body and a transmission belt, wherein a moving roller is provided on the inner wall of the running body, and a limiting ring groove is provided on the circumferential surface of the moving roller near its end, and a protruding strip is fixed on one side of the transmission belt, the surface of the protruding strip being in contact with the inner wall of the limiting ring groove, and threaded rods are provided at both ends of the moving roller, and the horizontal position of the moving roller in the running body is adjusted by the threaded rods.

[0007] Preferably, both ends of the moving roller are rotatably connected to end pieces.

[0008] Preferably, the end piece has a threaded groove on its circumferential surface, the inner wall of the threaded groove is threadedly connected to the circumferential surface of the threaded rod, and the threaded rod is driven by a drive assembly, which is fixed to the surface of the running body.

[0009] Preferably, the end piece is fixed with a plurality of trapezoidal pieces in a circumferential array, and the inner wall of the running body is provided with trapezoidal grooves at the locations corresponding to the trapezoidal pieces, and the inner wall of the trapezoidal grooves is slidably connected to the side of the trapezoidal pieces.

[0010] Preferably, rubber pads are glued to both ends of the trapezoidal component.

[0011] Preferably, a horizontal plate is fixed to the end of the end piece away from the moving roller, and a horizontal groove is opened on the inner wall of the running body at a position corresponding to the horizontal plate, and the inner wall of the horizontal groove is slidably connected to the side of the horizontal plate.

[0012] Preferably, the side of the horizontal plate away from the end piece has multiple plate side holes arranged in a linear array, and the side of the running body has multiple threaded through holes arranged in a linear array. The inner wall of the threaded through holes is threaded with bolts, and the bolts pass through the threaded through holes and enter the inner wall of the plate side holes.

[0013] Preferably, the edge of the side hole near the threaded through hole has an inwardly oriented bevel.

[0014] Beneficial effects:

[0015] 1. This utility model achieves the restriction of possible belt deviation during operation by using a protrusion on one side of the conveyor belt to cooperate with the limiting ring groove of the moving roller, preventing abnormal deviation. At the same time, it reduces the contact area between the inner wall of the limiting ring groove and the surface of the protrusion, preventing wear caused by a large contact area. Furthermore, the way the protrusion contacts the limiting ring groove ensures that the limiting ring groove does not directly contact the main body of the conveyor belt. In particular, since the protrusion is located on one side of the conveyor belt, it can be shielded by the side frame of the main body of the equipment. This ensures the maximum contact area of ​​the conveyor belt without affecting its carrying capacity, thereby better protecting the conveyor belt and improving its service life.

[0016] 2. This utility model realizes the adjustment of the horizontal position of the moving roller in the running body by means of the threaded rod, thereby ensuring that the transmission belt has a suitable tension by changing the position of the moving roller. At the same time, the threaded rod is threadedly connected to the threaded groove of the end piece, so that the movement can have self-locking property, thereby making the end piece move stably within the constraints of the horizontal plate and the trapezoidal part, preventing the end piece from sliding on its own due to the vibration generated during the operation of the equipment after the position is adjusted, thus achieving the effect of improving the positional stability of the end piece.

[0017] 3. This utility model achieves the cooperation between the threaded through hole and the side hole of the plate, so that the bolt can pass through the threaded through hole and enter the inner wall of the side hole of the plate through the running body. The bolt is guided by the inward inclined surface of one end edge of the threaded through hole, so that the operator can easily guide the bolt into the side hole of the plate after passing through the threaded through hole and the guiding inclined surface, thereby improving the user experience and improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the moving roller of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the threaded rod of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the trapezoidal component of this utility model;

[0022] Figure 5 This is a cross-sectional view of the end piece of this utility model;

[0023] Figure 6 This is a cross-sectional view of the horizontal plate of this utility model.

[0024] Legend:

[0025] 1. Main operating unit; 101. Conveyor belt;

[0026] 2. Moving roller; 201. Restricting ring groove; 202. Raised bar; 203. Threaded rod;

[0027] 3. Terminal components;

[0028] 4. Drive assembly; 401. Threaded groove;

[0029] 5. Trapezoidal groove; 501. Trapezoidal component;

[0030] 6. Rubber pad;

[0031] 7. Horizontal groove; 701. Horizontal plate;

[0032] 8. Side hole; 801. Threaded through hole. Detailed Implementation

[0033] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0034] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0036] Reference Figures 1-6 A tension adjustment device for a transmission belt of an all-electric injection molding machine includes a running body 1 and a transmission belt 101. The running body 1 includes a running platform with side frames fixed on both sides. A moving roller 2 is provided on the inner wall of the running body 1. A limiting ring groove 201 is formed on the circumferential surface of the moving roller 2 near its end. A protrusion 202 is fixed on one side of the transmission belt 101, and the surface of the protrusion 202 fits against the inner wall of the limiting ring groove 201. Threaded rods 203 are provided at both ends of the moving roller 2. The moving roller 2 is adjusted to a horizontal position in the running body 1 by the threaded rods 203. The tension adjustment is achieved by the protrusion 202 on one side of the transmission belt 101 engaging with the limiting ring groove 201 of the moving roller 2. To prevent abnormal deviation of the conveyor belt 101 during operation, the contact area between the inner wall of the limiting ring groove 201 and the surface of the protrusion 202 is reduced, preventing wear caused by a large contact area. Furthermore, the contact between the protrusion 202 and the limiting ring groove 201 ensures that the limiting ring groove 201 does not directly contact the main body of the conveyor belt 101. In particular, since the protrusion 202 is located on one side of the conveyor belt 101, it can be shielded by the side frame of the main body of the equipment. This ensures the maximum contact area of ​​the conveyor belt 101 without affecting its carrying effect, thus better protecting the conveyor belt 101.

[0037] Both ends of the moving roller 2 are rotatably connected to end pieces 3. Through the rotatable connection between the moving roller 2 and the end pieces 3, the friction between the moving roller 2 and the transmission belt 101 is greatly reduced, further reducing the wear of the transmission belt 101 at the moving roller 2 and improving the service life of the transmission belt 101.

[0038] The end piece 3 has a threaded groove 401 on its circumference. The inner wall of the threaded groove 401 is threadedly connected to the circumference of the threaded rod 203. The threaded rod 203 is driven by the drive assembly 4, which is fixed to the surface of the running body 1. Multiple trapezoidal pieces 501 are fixed in a circumferential array on the circumference of the end piece 3. A trapezoidal groove 5 is opened at the corresponding position of the trapezoidal piece 501 on the inner wall of the running body 1. The inner wall of the trapezoidal groove 5 is slidably connected to the side of the trapezoidal piece 501. The horizontal position of the moving roller 2 in the running body 1 is adjusted by the threaded rod 203, so that the transmission belt 101 has a suitable tension by changing the position of the moving roller 2. At the same time, the threaded rod 203 is threadedly connected to the threaded groove 401 of the end piece 3, so that the movement can have self-locking property. This allows the end piece 3 to move stably under the restriction of the horizontal plate 701 and the trapezoidal pieces 501, preventing the end piece 3 from sliding on its own due to the vibration generated during the operation of the equipment after the position is adjusted.

[0039] Both ends of the trapezoidal component 501 are glued with rubber pads 6. The rubber pads 6 provide buffer between the trapezoidal component 501 and the trapezoidal groove 5, thereby preventing collision and wear caused by direct contact between the two and improving their service life.

[0040] A horizontal plate 701 is fixed at the end of the end piece 3 away from the moving roller 2. A horizontal groove 7 is opened on the inner wall of the running body 1 at the position corresponding to the horizontal plate 701. The inner wall of the horizontal groove 7 is slidably connected to the side of the horizontal plate 701. Through the cooperation between the horizontal plate 701 and the horizontal groove 7, the horizontal groove 7 shares the stress borne by the trapezoidal piece 501 when it is in the limit position, thereby improving its service life.

[0041] Multiple side holes 8 are linearly arranged on the side of the horizontal plate 701 away from the end piece 3, and multiple threaded through holes 801 are linearly arranged on the side of the running body 1. Bolts are threadedly connected to the inner wall of the threaded through holes 801. The bolts pass through the threaded through holes 801, through the running body 1, and into the inner wall of the side holes 8. The edge of the side hole 8 near the threaded through hole 801 has an inwardly oriented bevel. Through the cooperation between the threaded through hole 801 and the side hole 8, the bolt can pass through the threaded through hole 801, through the running body 1, and into the inner wall of the side hole 8. The inwardly oriented bevel of the edge of the threaded through hole 801 guides the bolt, so that the operator can easily guide the bolt into the side hole 8 after passing through the threaded through hole 801 and the guiding bevel. Specific Implementation Example 2:

[0043] Reference Figures 1-6In the transmission system of the MA6500 all-electric injection molding machine, the structure disclosed in this utility model is used by the operator. The moving roller 2 (45# steel, quenched HRC50-55) is installed inside the main body 1. Its limiting ring groove 201 (12mm wide, 3mm deep) precisely matches the polyurethane protrusion 202 (90 Shore A hardness) on the side of the transmission belt 101 (Gates Poly Chain GT Carbon). When the belt tension drops to 180N (standard value 220±20N), the Delta ECMA-E11320RS servo motor in the drive assembly 4 drives the threaded rod 203 (Tr20×4 lead) to rotate, pushing the moving roller 2 horizontally by 15mm through the threaded groove 401 of the end piece 3. During this process, the four sets of trapezoidal parts 501 (20CrMnTi carburized) in the circumferential array of end part 3 slide along the trapezoidal groove 5, and the 1.5mm thick rubber pads 6 at both ends absorb vibration; at the same time, the horizontal plate 701 (Q235B, 10mm thick) moves synchronously in the horizontal groove 7 to ensure that the displacement straightness error is ≤0.05mm.

[0044] The contact area between the protruding strip 202 and the limiting ring groove 201 is only 18% of that of a traditional fully enclosed structure, and the measured belt misalignment is controlled within ±0.3mm. After adjustment, the M8 bolt is screwed into the threaded through hole 801 of the running body 1, and the 45° guide slope of the inlet of the side hole 8 allows the bolt to automatically slide into the locking plate 701 (locking torque 12N·m). After tensioning, the belt tension is restored to 215N, and the vibration amplitude under the impact of servo motor start-stop is reduced by 62%.

[0045] After three months of continuous operation (an average of 2,800 injections per day), the wear of the convex strip 202 was 0.15 mm, and the wear of the contact surface between the trapezoidal part 501 and the trapezoidal groove 5 was only 0.02 mm. Compared with the traditional tensioning structure, the belt life was extended by 2.3 times, and the maintenance time was reduced from 45 minutes to 6 minutes.

[0046] The working principle of this utility model is as follows: When the tension of the transmission belt 101 needs to be adjusted, the drive assembly 4 drives the threaded rod 203 to rotate, which in turn drives the moving roller 2 to move horizontally by engaging with the threaded groove 401 of the end piece 3; the trapezoidal pieces 501 at both ends of the moving roller 2 slide along the trapezoidal groove 5 of the running body 1, the rubber pad 6 buffers the vibration, and at the same time the horizontal plate 701 moves in coordination within the horizontal groove 7 to ensure accurate displacement without deviation; during the tensioning process, the protrusion 202 on one side of the transmission belt 101 is always embedded in the limiting ring groove 201 of the moving roller 2, and the tension is achieved by only... The minimum contact area between the protruding strip 202 and the limiting ring groove 201 limits the lateral deviation of the belt and avoids abnormal wear caused by the traditional fully enclosed structure. After adjustment, the self-locking characteristic of the threaded rod 203 and the wedge-shaped fit of the trapezoidal part 501-trapezoidal groove 5 work together to resist equipment vibration and maintain stable tension. When the position needs to be locked, the bolt is screwed into the threaded through hole 801 of the running body 1, automatically aligned through the guide slope of the inlet of the plate side hole 8, and mechanically locked through the horizontal plate 701, so that the equipment does not need to be tensioned again during operation.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tension adjustment device for a transmission belt of an all-electric injection molding machine, comprising a running body (1) and a transmission belt (101), characterized in that: The inner wall of the running body (1) is provided with a moving roller (2). The circumferential surface of the moving roller (2) near the end is provided with a limiting ring groove (201). A protrusion (202) is fixed on one side of the transmission belt (101). The surface of the protrusion (202) is in contact with the inner wall of the limiting ring groove (201). Both ends of the moving roller (2) are provided with threaded rods (203). The moving roller (2) is adjusted in the horizontal position in the running body (1) by the threaded rods (203).

2. The tension adjustment device for a fully electric injection molding machine drive belt according to claim 1, characterized in that: Both ends of the moving roller (2) are rotatably connected to end pieces (3).

3. The tension adjustment device for a fully electric injection molding machine transmission belt according to claim 2, characterized in that: The end piece (3) has a threaded groove (401) on its circumference. The inner wall of the threaded groove (401) is threadedly connected to the circumference of the threaded rod (203). The threaded rod (203) is driven by a drive assembly (4), which is fixed to the surface of the running body (1).

4. The tension adjustment device for a fully electric injection molding machine drive belt according to claim 2, characterized in that: The end piece (3) has a circumferential array of multiple trapezoidal pieces (501) fixed on its periphery. The inner wall of the running body (1) is provided with trapezoidal grooves (5) corresponding to the trapezoidal pieces (501). The inner wall of the trapezoidal grooves (5) is slidably connected to the side of the trapezoidal pieces (501).

5. The tension adjustment device for a fully electric injection molding machine drive belt according to claim 4, characterized in that: Both ends of the trapezoidal component (501) are glued and fixed with rubber pads (6).

6. The tension adjustment device for a fully electric injection molding machine drive belt according to claim 2, characterized in that: The end of the end piece (3) away from the moving roller (2) is fixed with a horizontal plate (701). A horizontal groove (7) is opened on the inner wall of the running body (1) at the position corresponding to the horizontal plate (701). The inner wall of the horizontal groove (7) is slidably connected to the side of the horizontal plate (701).

7. The tension adjustment device for a fully electric injection molding machine drive belt according to claim 6, characterized in that: The horizontal plate (701) has multiple side holes (8) arranged in a linear array on the side away from the end piece (3), and the running body (1) has multiple threaded through holes (801) arranged in a linear array on one side. The inner wall of the threaded through hole (801) is threaded with a bolt, and the bolt passes through the threaded through hole (801) and enters the inner wall of the side hole (8).

8. The tension adjustment device for a fully electric injection molding machine transmission belt according to claim 7, characterized in that: The plate side hole (8) has an inwardly oriented bevel at one end edge near the threaded through hole (801).

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