A speed regulating mechanism for the boom of a sheathed pipe bending extruder

Abstract

This utility model provides a speed-regulating mechanism for the rotating arm of a sheathed pipe bending extruder, belonging to the field of plastic pipe bending manufacturing. The rotating arm speed-regulating mechanism includes a first driving mechanism and a second driving mechanism. The first driving mechanism includes a first driving motor, the output shaft of which is fixedly connected to the input end of a first reducer. The output shaft of the first reducer can be switched on and off to connect to a second reducer. The second driving mechanism includes a second driving motor, the output shaft of which can be switched on and off to connect to a second reducer. The output shaft of the second reducer is fixedly connected to the rotating arm. For different processes, the first driving mechanism and the second driving mechanism can be selectively switched, thereby simultaneously meeting the requirements of low speed and high torque during pipe bending and high speed and low torque during resetting, thus improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe preparation, specifically to a speed regulating mechanism for the rotating arm of a sheathed pipe extruder. Background Technology

[0002] Currently, plastic pipe bending extrusion molding equipment is relatively mature. The extruded pipe is bent into shape by a traction device, which is mostly a rotary arm type traction device, such as the polyurethane insulation pipe elbow polyethylene outer protective pipe extrusion molding equipment in patent CN209191245U. The extruded pipe is bent into shape by a traction system, which includes a rotary drive mechanism, a rotary seat, a rotary arm, a rotary arm holder, and a traction clamp. The traction clamp holds the end of the extruded pipe and rotates it to gradually shape the pipe during the extrusion process. During plastic pipe bending extrusion molding, a large traction force is required to bend the pipe at a certain speed and angle. The traction speed is slow; it takes 40 to 50 minutes for the rotary arm to rotate 15°. After the pipe is formed, the rotary arm needs to be reset for the next traction. If the same motor-driven rotary arm rotation reset method is used, it will greatly affect production efficiency. Utility Model Content

[0003] To solve the above problems, this utility model provides a speed regulating mechanism for the rotating arm of a sheathed pipe bending extruder.

[0004] This utility model is achieved in the following manner:

[0005] A speed regulating mechanism for the rotating arm of a sheathed pipe bending extruder, comprising a first driving mechanism and a second driving mechanism, wherein the first driving mechanism includes a first driving motor, the output shaft of the first driving motor is fixedly connected to the input end of a first reducer, and the output shaft of the first reducer is on / off connected to a second reducer; the second driving mechanism includes a second driving motor, the output shaft of the second driving motor is on / off connected to a second reducer, and the output shaft of the second reducer is fixedly connected to the rotating arm.

[0006] A first output shaft gear is fixedly provided on the output shaft of the first reducer, and the first output shaft gear is detachably connected to the first transmission shaft through a first meshing sleeve to form a transmission engagement; a second output shaft gear is fixedly provided on the output shaft of the second drive motor, and the second output shaft gear is detachably connected to the second transmission shaft through a second meshing sleeve to form a transmission engagement.

[0007] The first meshing sleeve is provided with bidirectional meshing teeth. Its first side teeth are always meshed with the first output shaft gear, and its second side teeth are detachably meshed with the first gear located at the end of the first transmission shaft. The second meshing sleeve has the same structure as the first meshing sleeve.

[0008] Both the first drive shaft and the second drive shaft are connected to the input shaft of the second reducer.

[0009] A first bevel gear is provided at the end of the first drive shaft away from the first gear, a second bevel gear is provided at the end of the second drive shaft away from the second gear, and a third bevel gear is provided on the input shaft of the second reducer; the first bevel gear and the second bevel gear mesh with the third bevel gear respectively, forming a double-input single-output bevel gear transmission mechanism.

[0010] The first bevel gear and the second bevel gear respectively form orthogonal meshing transmission pairs with the third bevel gear.

[0011] The lower parts of the first drive mechanism and the second drive mechanism are respectively fixed with movable seats. The movable seats are slidably mounted on the base via a slide rod. The movable seats are provided with a limiting device that cooperates with the base. When the first gear sleeve is engaged with the first gear, the locking part of the limiting device and the cooperating part of the base form a rigid constraint, preventing the movable seats from displacing relative to the base.

[0012] Compared with the prior art, the swing arm speed regulating mechanism in this utility model includes a first drive mechanism and a second drive mechanism, which can be selectively switched, thereby simultaneously meeting the requirements of low speed and high torque during pipe bending and high speed and low torque during resetting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the drive mechanism's state when the pipe is bent.

[0015] Figure 3 This is a schematic diagram of the drive mechanism's state when the swing arm rotates.

[0016] Figure 4 yes Figure 1 Sectional view at point B.

[0017] Figure 5 This is a schematic diagram of the meshing sleeve structure.

[0018] Wherein, 1 is a rotating arm; 2 is a clamp; 3 is a first drive mechanism; 31 is a first drive motor; 32 is a first reducer; 33 is a first output shaft gear; 34 is a first meshing sleeve; 341 is a first side tooth; 342 is a second side tooth; 35 is a first transmission shaft; 36 is a first gear; 37 is a first bevel gear; 4 is a second drive mechanism; 41 is a second drive motor; 42 is a second output shaft gear; 43 is a second meshing sleeve; 44 is a second transmission shaft; 45 is a second gear; 46 is a second bevel gear; 5 is a second reducer; 51 is a third bevel gear; 6 is a moving seat; 7 is a base; 71 is a lead screw; 8 is a limiting hole; 9 is a limiting bolt; and 10 is a stop block. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer with the description. However, unless otherwise specified, the specific experimental methods involved in the following embodiments are conventional methods or implemented according to the conditions recommended in the manufacturer's instructions.

[0020] See Figures 1-5 A speed-regulating mechanism for the rotating arm of a sheathed pipe bending extruder is characterized in that the rotating arm speed-regulating mechanism includes a first drive mechanism 3 and a second drive mechanism 4. The first drive mechanism 3 includes a first drive motor 31, the output shaft of which is fixedly connected to the input end of a first reducer 32. The output shaft of the first reducer 32 is configurably connected to a second reducer 5. The second drive mechanism 4 includes a second drive motor 41, the output shaft of which is configurably connected to a second reducer 5. The output shaft of the second reducer 5 is fixedly connected to the rotating arm 1. The second reducer 5 is a single-stage or n-stage series reducer, and the output end of the last stage of the n-stage series reducer is fixedly connected to the rotation shaft of the rotating arm.

[0021] The bending process of plastic tubes requires a large driving torque. The longer the swing arm, the greater the required torque. At this time, the motor needs to stably output high torque at low speed. After the tube is bent, the swing arm needs to quickly return to its unloaded state, requiring the motor to run at high speed. However, the torque-speed characteristics of existing rotary equipment, such as single-motor drive systems, cannot simultaneously meet the contradictory requirements of low-speed, high-torque during tube bending and high-speed, low-torque during return, resulting in a trade-off between forming accuracy and production efficiency. The rotating arm speed regulating mechanism in this utility model includes a first drive mechanism and a second drive mechanism, which can be selectively switched to simultaneously meet the requirements of low speed and high torque during tube bending and high speed and low torque during resetting. The process of using this utility model to adjust the speed and torque over a wide range is as follows: During plastic tube bending extrusion molding, the motor needs to stably output high torque at low speed. The output shaft of the first drive mechanism connected to the first reducer is connected to the second reducer 5, so that the rotating arm rotates 15° in 40 to 50 minutes, which needs to meet the requirements of low speed and high torque during tube bending. After tube bending, when the rotating arm resets, the output shaft of the first drive mechanism is disconnected from the second reducer 5, and the output shaft of the second drive mechanism is connected to the second reducer 5. The rotating arm can quickly reset in 7 to 8 minutes, greatly reducing the reset time and improving production efficiency.

[0022] like Figure 2 , 3As shown, a first output shaft gear 33 is fixedly provided on the output shaft of the first reducer 32. The first output shaft gear 33 is detachably connected to the first transmission shaft 35 through the first meshing sleeve 34 to form a transmission engagement, thereby achieving a switchable connection. A second output shaft gear 42 is fixedly provided on the output shaft of the second drive motor 41. The second output shaft gear 42 is detachably connected to the second transmission shaft 44 through the second meshing sleeve 43 to form a transmission engagement, thereby achieving a switchable connection.

[0023] Specifically, such as Figure 5 As shown, the first gear sleeve 34 is provided with bidirectional meshing teeth. Its first side teeth 341 are always meshed with the first output shaft gear 33, and its second side teeth 342 are detachably engaged with the first gear 36 located at the end of the first transmission shaft 35. Through axial displacement, it can form a switchable meshing connection with the first gear 36, so that the output shaft of the first reducer 32 and the first transmission shaft 35 form a separable transmission mechanism. Similarly, the second gear sleeve 43 has the same structure as the first gear sleeve 34. One side teeth of the second gear sleeve 43 are always meshed with the second output shaft gear 42, and the other side teeth can be detachably engaged with the second gear 45 located at the end of the second transmission shaft 44 through axial displacement, so that the output shaft of the second drive motor 41 and the second transmission shaft 44 form a separable transmission mechanism.

[0024] The first output shaft gear 33 and the first gear 36 can also be separated into a transmission mechanism via an internal gear coupling.

[0025] Preferably, the gear sleeve is made of nylon, the first gear sleeve 34 is interference-fitted with the first output shaft gear 33, and the first gear sleeve 34 is clearance-fitted with the first gear 36.

[0026] like Figure 4 As shown, both the first drive shaft 35 and the second drive shaft 44 are connected to the input shaft of the second reducer 5. Specifically, the end of the first drive shaft 35 away from the first gear 36 is provided with a first bevel gear 37, the end of the second drive shaft 44 away from the second gear 45 is provided with a second bevel gear 46, and the input shaft of the second reducer 5 is provided with a third bevel gear 51. The first bevel gear 37 and the second bevel gear 46 mesh with the third bevel gear 51 respectively, forming a double-input single-output bevel gear transmission mechanism. Preferably, the first bevel gear 37 and the second bevel gear 46 form orthogonal meshing transmission pairs with the third bevel gear 51 respectively, realizing the conversion of power direction and transmission path.

[0027] like Figure 2 , 3As shown, the lower parts of the first drive mechanism 3 and the second drive mechanism 4 are respectively fixed with movable seats 6. The movable seats 6 are slidably mounted on the base 7 via a slide rod 71, so that the movable seats move in the AA direction and drive the first drive mechanism 3 and the first gear sleeve 34 to move axially in the first gear sleeve, selectively meshing with the first gear 36. The movable seats 6 are provided with a limiting device that cooperates with the base 7. When the first gear sleeve 34 is meshed with the first gear 36, the locking part of the limiting device and the cooperating part of the base form a rigid constraint, preventing the movable seats 6 from moving relative to the base.

[0028] Specifically, the limiting device includes a limiting hole on the movable seat, a stop block at the end of the slide rod, and a detachable limiting bolt. When the movable seat moves to the end of the guide rail near the first gear sleeve, the limiting hole is located outside the stop block. The limiting bolt is inserted into the limiting hole, and the limiting bolt and the stop block form a rigid constraint, preventing the movable seat 6 from displacing relative to the base during the operation of the drive mechanism.

[0029] Similarly, the second drive mechanism 4 is also slidably mounted on the base in the same manner as described above, which enables the second drive mechanism 4 and the second meshing sleeve 43 to be displaced axially in the second meshing sleeve, selectively meshing with the second gear 45. When the second meshing sleeve 43 and the second gear 45 are meshed, the locking part of the limiting device and the mating part of the base form a rigid constraint, preventing the moving seat 6 from being displaced relative to the base.

[0030] A clamp is installed at one end of the rotating arm to hold the bent pipe.

[0031] The connection between the reducer and the swing arm is existing technology and will not be described in detail here.

[0032] The method of using this utility model device is as follows:

[0033] During the extrusion molding of plastic bent pipes, the lower movable seat of the first drive mechanism 3 is moved in the AA direction, so that the first meshing sleeve engages with the first gear 36. The limiting bolt is inserted into the limiting hole to form a rigid constraint, preventing the movable seat 6 from displacing relative to the base during the operation of the first drive mechanism. The first drive mechanism 3 is started, and the motor outputs high torque at a stable low speed, driving the rotating arm to rotate, causing the pipe to gradually bend during the rotation of the rotating arm. After the pipe is bent, the limiting bolt at the first drive mechanism 3 is pulled out, and the lower movable seat of the first drive mechanism 3 is moved to separate the first meshing sleeve from the first gear 36. The second drive mechanism 4 is switched, and the lower movable seat of the second drive mechanism 4 is moved in the AA direction, so that the second meshing sleeve 43 engages with the second gear 45. The limiting bolt is inserted into the limiting hole to form a rigid constraint, preventing the movable seat 6 from displacing relative to the base during the operation of the second drive mechanism. The second drive mechanism is started, the motor runs at high speed, and the rotating arm quickly rotates back to its original position, saving time and improving the rotation arm reset speed after 90° pipe bending. Each pipe saves at least one hour of reset time.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A speed control mechanism for a swivel arm of a jacket pipe extruder, characterized in that The rotating arm speed regulating mechanism includes a first drive mechanism (3) and a second drive mechanism (4). The first drive mechanism (3) includes a first drive motor (31). The output shaft of the first drive motor (31) is fixedly connected to the input end of the first reducer (32). The output shaft of the first reducer (32) can be switched on and off to connect to the second reducer (5). The second drive mechanism (4) includes a second drive motor (41). The output shaft of the second drive motor (41) can be switched on and off to connect to the second reducer (5). The output shaft of the second reducer (5) is fixedly connected to the rotating arm (1).

2. A speed control mechanism for the rotating arm of a jacket pipe extrusion machine according to claim 1, characterized in that, The first reducer (32) has a first output shaft gear (33) fixedly mounted on its output shaft. The first output shaft gear (33) is detachably connected to the first transmission shaft (35) via a first meshing sleeve (34). The second drive motor (41) has a second output shaft gear (42) fixedly mounted on its output shaft. The second output shaft gear (42) is detachably connected to the second transmission shaft (44) via a second meshing sleeve (43).

3. A speed control mechanism for the rotating arm of a jacketed pipe extrusion machine according to claim 2, characterized in that The first gear sleeve (34) is provided with bidirectional meshing teeth. Its first side teeth (341) are always meshed with the first output shaft gear (33), and its second side teeth (342) are detachably meshed with the first gear (36) located at the end of the first transmission shaft (35). The second gear sleeve (43) has the same structure as the first gear sleeve (34).

4. The speed regulating mechanism for the boom of a sheathed pipe bending extruder according to claim 2, characterized in that, Both the first drive shaft (35) and the second drive shaft (44) are connected to the input shaft of the second reducer (5).

5. A speed control mechanism for the rotating arm of a jacketed pipe extrusion machine according to claim 4, characterized in that A first bevel gear (37) is provided at the end of the first transmission shaft (35) away from the first gear (36), a second bevel gear (46) is provided at the end of the second transmission shaft (44) away from the second gear (45), and a third bevel gear (51) is provided on the input shaft of the second reducer (5); the first bevel gear (37) and the second bevel gear (46) mesh with the third bevel gear (51) respectively, forming a double-input single-output bevel gear transmission mechanism.

6. A speed control mechanism for the rotating arm of a jacket tube extrusion machine according to claim 5, characterized in that The first bevel gear (37) and the second bevel gear (46) respectively form orthogonal meshing transmission pairs with the third bevel gear (51).

7. The speed regulating mechanism for the boom of a sheathed pipe bending extruder according to claim 1, characterized in that, The lower parts of the first drive mechanism (3) and the second drive mechanism (4) are respectively fixed with a movable seat (6). The movable seat (6) is slidably mounted on the base (7) via a slide rod (71). The movable seat (6) is provided with a limiting device that cooperates with the base (7). When the first meshing sleeve (34) is engaged with the first gear (36), the locking part of the limiting device and the cooperating part of the base form a rigid constraint, preventing the movable seat (6) from moving relative to the base.

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