Pulley transmission device

Abstract

The utility model discloses a pulley transmission device and relates to the technical field of transmission devices, the pulley transmission device comprises a pulley seat and a pressing plate, a transmission shaft and a gear shaft are rotatably connected to the inside of the pulley seat in a vertically penetrating mode in sequence, and self-aligning bearings are fixedly arranged on the outer surfaces of the two ends of the transmission shaft in a sleeved mode. The outer surfaces of the two ends of the gear shaft are fixedly sleeved with conical bearings respectively, a transmission moving mechanism is arranged among the transmission shaft, the gear shaft and the pressing plate, and a pulley guiding mechanism is arranged between the gear shaft and the pressing plate. Conical bearings are selected on the two sides of the gear shaft, left-right movement between the second gear and the guide pulley can be better eliminated, and therefore the guide pulley can stably roll on the guide rail.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission devices, in particular to a pulley transmission device. Background Art

[0002] The die of the extruder can be divided into right-angle die and bevel die according to the direction of the material flow and the angle between the centerline of the screw. The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the materials and form them through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and the rare multi-screw extruders and screwless extruders.

[0003] Existing extruders often have matching auxiliary machines, some of which have three rollers. The three rollers will be moved and adjusted during actual use, and a corresponding pulley transmission device is required for movement. The existing pulley transmission device has a relatively simple structure and is supported and installed only by ordinary roller bearings. It is easy to be eccentric in actual use, which will cause the transmission device to jump and move left and right, thereby affecting the operation of the entire device. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a pulley transmission device, which solves the problems raised in the background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a pulley transmission device, including a pulley seat and a pressure plate, the interior of the pulley seat is sequentially penetrated by a transmission shaft and a gear shaft for rotation connection, both ends of the outer surface of the transmission shaft are fixed with self-aligning bearings, both ends of the outer surface of the gear shaft are fixed with tapered bearings, a transmission moving mechanism is provided between the transmission shaft, the gear shaft and the pressure plate, and a pulley guide mechanism is provided between the gear shaft and the pressure plate.

[0006] Preferably, a first mounting groove and a second mounting groove are respectively provided on both sides of the outer surface of the pulley seat, the self-aligning bearing is embedded and fixedly installed in the first mounting groove, and the tapered bearing is embedded and fixedly installed in the second mounting groove. The first mounting groove and the second mounting groove are provided to facilitate the installation of the self-aligning bearing and the tapered bearing respectively.

[0007] Preferably, the transmission moving mechanism includes a first gear fixedly sleeved on the outer surface of the transmission shaft, the outer surface of the gear shaft is fixedly sleeved with a second gear meshing with the first gear, the upper surface of the pressure plate is fixedly connected with a rack meshing with the second gear, the rotation of the transmission shaft drives the first gear to rotate, the rotation of the first gear drives the second gear to rotate, and the rotation of the second gear can drive the entire pulley seat to move through the rack.

[0008] Preferably, the pulley guide mechanism includes a guide pulley fixedly mounted on the outer surface of the gear shaft, and the upper surface of the pressure plate is fixedly connected to a guide rail matching the guide pulley. The movement of the pulley seat can be guided by the cooperation between the guide pulley and the guide rail to avoid deviation.

[0009] Preferably, a spacer sleeve is fixed on the outer surface of one end of the transmission shaft, and one end of the spacer sleeve contacts the inner ring of the self-aligning bearing. The self-aligning bearing can be supported by the spacer sleeve, thereby reducing wear and increasing service life.

[0010] Preferably, an opening is provided at the top of the pulley seat, a top cover is embedded and installed inside the opening, and a plurality of mounting holes are sequentially provided on both sides of the upper surface of the pressure plate, so that the pressure plate can be conveniently installed in the corresponding use position through the provided mounting holes.

[0011] The utility model provides a pulley transmission device, which has the following beneficial effects:

[0012] The pulley transmission device is a sliding device for three rollers of an extruder auxiliary machine. The transmission shaft is driven to rotate by an external motor. The coaxiality of the first mounting grooves on both sides of the pulley seat can be eliminated through the sliding of the self-aligning bearings on both sides, so that the motor can drive the transmission moving mechanism to run better and more smoothly. Tapered bearings are used on both sides of the gear shaft, which can better eliminate the left and right movement between the second gear and the guide pulley, so that the guide pulley can roll smoothly on the guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the pulley seat structure of the utility model.

[0017] In the figure, 1, pulley seat; 2, pressure plate; 3, transmission shaft; 4, gear shaft; 5, self-aligning bearing; 6, tapered bearing; 7, first mounting groove; 8, second mounting groove; 9, first gear; 10, second gear; 11, rack; 12, guide pulley; 13, guide rail; 14, spacer; 15, opening. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1:

[0020] like Figures 1 to 4 As shown, a pulley transmission device includes a pulley seat 1 and a pressure plate 2, a transmission shaft 3 and a gear shaft 4 are sequentially penetrated and rotatably connected inside the pulley seat 1, both ends of the outer surface of the transmission shaft 3 are fixedly sleeved with self-aligning bearings 5, and both ends of the outer surface of the gear shaft 4 are fixedly sleeved with tapered bearings 6, the outer surface of the pulley seat 1 is respectively provided with a first mounting groove 7 and a second mounting groove 8 on both sides, the self-aligning bearing 5 is embedded and fixedly installed in the first mounting groove 7, and the tapered bearing 6 is embedded and fixedly installed in the second mounting groove 8.

[0021] When in use, the transmission shaft 3 is connected to an external motor, and the rotation of the motor can drive the transmission shaft 3 to rotate. The transmission shaft 3 slides through the self-aligning bearings 5 ​​on both sides to eliminate the coaxiality of the first mounting grooves 7 on both sides of the pulley seat 1, which can better and more smoothly allow the motor to drive the transmission moving mechanism to operate. Tapered bearings 6 are used on both sides of the gear shaft 4, which can better eliminate the left and right movement between the second gear 10 and the guide pulley 12, so that the guide pulley 12 can roll smoothly on the guide rail 13.

[0022] Embodiment 2:

[0023] like Figures 1 to 3 As shown, a transmission moving mechanism is provided between the transmission shaft 3, the gear shaft 4 and the pressure plate 2, and the transmission moving mechanism includes a first gear 9 fixedly sleeved on the outer surface of the transmission shaft 3, and the outer surface of the gear shaft 4 is fixedly sleeved with a second gear 10 meshing with the first gear 9, and the upper surface of the pressure plate 2 is fixedly connected with a rack 11 meshing with the second gear 10. The rotation of the transmission shaft 3 drives the first gear 9 to rotate, and the rotation of the first gear 9 drives the second gear 10 to rotate. The rotation of the second gear 10 can drive the entire pulley seat 1 to move through the rack 11.

[0024] Embodiment 3:

[0025] like Figures 1 to 3As shown, a pulley guide mechanism is provided between the gear shaft 4 and the pressure plate 2, and the pulley guide mechanism includes a guide pulley 12 fixedly sleeved on the outer surface of the gear shaft 4, and a guide rail 13 matched with the guide pulley 12 is fixedly connected to the upper surface of the pressure plate 2. When the pulley seat 1 moves, the movement of the pulley seat 1 can be guided by the cooperation of the guide pulley 12 and the guide rail 13 to avoid deviation.

[0026] Embodiment 4:

[0027] like Figure 1 and Figure 4 As shown, a spacer sleeve 14 is fixedly mounted on the outer surface of one end of the transmission shaft 3, and one end of the spacer sleeve 14 contacts the inner ring of the self-aligning bearing 5. The spacer sleeve 14 can support the self-aligning bearing 5, thereby reducing wear and improving service life.

[0028] An opening 15 is provided on the top of the pulley seat 1, and a top cover is embedded and installed inside the opening 15. A plurality of mounting holes are sequentially provided on both sides of the upper surface of the pressing plate 2, and the pressing plate 2 can be conveniently installed in the corresponding use position through the provided mounting holes.

[0029] Working principle: When in use, one end of the transmission shaft 3 is connected to an external motor. When the motor rotates, it drives the transmission shaft 3 to rotate. The rotation of the transmission shaft 3 drives the first gear 9 to rotate. The rotation of the first gear 9 drives the second gear 10 to rotate. The rotation of the second gear 10 can drive the entire pulley seat 1 to move through the rack 11. When the pulley seat 1 moves, the movement of the pulley seat 1 can be guided by the cooperation of the guide pulley 12 and the guide rail 13 to avoid deviation. The transmission shaft 3 slides through the self-aligning bearings 5 ​​on both sides to eliminate the coaxiality of the first mounting grooves 7 on both sides of the pulley seat 1, which can better and more smoothly allow the motor to drive the transmission moving mechanism to run. Tapered bearings 6 are used on both sides of the gear shaft 4, which can better eliminate the left and right movement between the second gear 10 and the guide pulley 12, so that the guide pulley 12 can roll smoothly on the guide rail 13.

[0030] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pulley transmission device, comprising a pulley seat (1) and a pressure plate (2), characterized in that: A transmission shaft (3) and a gear shaft (4) are rotatably connected to the interior of the pulley seat (1) in sequence from top to bottom. Self-aligning bearings (5) are fixedly sleeved on the outer surfaces of both ends of the transmission shaft (3). Conical bearings (6) are fixedly sleeved on the outer surfaces of both ends of the gear shaft (4). A transmission moving mechanism is provided between the transmission shaft (3), the gear shaft (4) and the pressure plate (2). A pulley guide mechanism is provided between the gear shaft (4) and the pressure plate (2).

2. A pulley transmission device according to claim 1, characterized in that: A first mounting groove (7) and a second mounting groove (8) are respectively provided on both sides of the outer surface of the pulley seat (1); the self-aligning bearing (5) is embedded and fixedly installed in the first mounting groove (7); and the tapered bearing (6) is embedded and fixedly installed in the second mounting groove (8).

3. A pulley transmission device according to claim 1, characterized in that: The transmission movement mechanism comprises a first gear (9) fixedly sleeved on the outer surface of the transmission shaft (3); a second gear (10) meshing with the first gear (9) is fixedly sleeved on the outer surface of the gear shaft (4); and a rack (11) meshing with the second gear (10) is fixedly connected to the upper surface of the pressure plate (2).

4. A pulley transmission device according to claim 1, characterized in that: The pulley guide mechanism comprises a guide pulley (12) fixedly sleeved on the outer surface of the gear shaft (4), and the upper surface of the pressure plate (2) is fixedly connected with a guide rail (13) matched with the guide pulley (12).

5. A pulley transmission device according to claim 4, characterized in that: A spacer sleeve (14) is fixedly mounted on the outer surface of one end of the transmission shaft (3), and one end of the spacer sleeve (14) is in contact with the inner ring of the self-aligning bearing (5).

6. A pulley transmission device according to claim 1, characterized in that: An opening (15) is provided at the top of the pulley seat (1), a top cover is embedded and installed inside the opening (15), and a plurality of mounting holes are sequentially provided on both sides of the upper surface of the pressure plate (2).

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