A variable frequency stepless speed regulating device for asphalt mixing station
By installing a guide sleeve and adjustment rod on the outside of the output shaft of the speed control motor of the asphalt mixing station, the problem of the axis offset caused by centrifugal force of the variable frequency stepless speed control motor is solved, and the stable rotation and lubrication of the stirring shaft is achieved, which improves the service life and efficiency of the equipment.
Patent Information
- Application Number
- CN202421329620.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-12
AI Technical Summary
When driving the stirring shaft, the existing variable frequency stepless speed control motors can easily lead to axial deviation of the motor shaft due to the centrifugal force, which affects the use.
A frequency-inverting stepless speed regulation device for asphalt mixing station is designed. By installing two guide sleeves on the outside of the output shaft of the speed regulation motor, the guide sleeves clamp and position the output shaft to ensure the stability of the shaft. At the same time, by adjusting the relative thread movement between the rod and the guide sleeve, the output shaft is lubricated by lubricating the lubricating oil in the sponge block to reduce friction.
It effectively prevents the axis center of the output shaft of the speed control motor, ensures stable rotation of the agitating shaft, reduces friction between the guide sleeve and the output shaft, and improves the service life and efficiency of the equipment.
Smart Images
Figure CN222744727U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of speed regulating devices, in particular to a variable frequency stepless speed regulating device for an asphalt mixing station. Background Art
[0002] Asphalt mixing plant is a device used to produce asphalt concrete. It is usually composed of a mixing tower, a silo, a metering system, a conveying system, etc., and most of them are driven by variable frequency stepless speed regulating motors. For example, the utility model patent with the announcement number CN218854179U discloses a variable speed mixer for asphalt mixture, which can adjust the speed of the mixing shaft under different working conditions to meet the actual mixing working conditions, including a mixing frame, a mixing tank, a PLC controller, a variable frequency speed regulator and a motor. The mixing tank is tilted on the mixing frame as a whole, and the motor drives the mixing tank to rotate through a gear transmission mechanism. The inner wall of the mixing tank is equipped with spiral blades, and the variable frequency speed regulator is connected to and controls the working frequency of the motor, and the PLC controller is connected to and controls the working state of the variable frequency speed regulator. The patent provides a variable speed mixer for asphalt mixture, which can adjust the speed of the mixing shaft under different working conditions, that is, the speed can be adjusted to several gears to meet the actual mixing working conditions.
[0003] However, in the process of driving the stirring shaft, the existing variable frequency stepless speed regulating motor can easily cause the axis center of the motor shaft to deviate due to the effect of centrifugal force, thus affecting the use. Therefore, improvement is needed. Utility Model Content
[0004] The utility model aims to provide a variable frequency stepless speed regulating device for an asphalt mixing station, which solves the problem that the existing variable frequency stepless speed regulating motor can easily cause the axis center of the motor shaft to deviate due to the centrifugal force in the process of driving the mixing shaft, thus affecting the use.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a variable frequency stepless speed regulation device for an asphalt mixing station, comprising a mixing tank, a tank cover is detachably mounted on the top of the mixing tank, a speed regulating motor is fixedly mounted on the middle part of the upper end of the tank cover, the output shaft of the speed regulating motor passes through the tank cover and is connected to the tank cover through a bearing, the end of the output shaft is fixedly connected to a mixing shaft, a feed port is fixedly connected to the inside of the tank cover and located on the left side of the speed regulating motor, a guide sleeve is slidably connected to the outside of the shaft body of the output shaft, a connecting frame is fixedly connected to the outside of the guide sleeve, a positioning block is fixedly connected to the vertical part of the connecting frame, the positioning block is plugged into the tank cover, a locking pin is slidably connected to the inside of the tank cover, the locking pin is plugged into the positioning block, and a spring 2 is arranged inside the tank cover.
[0006] Preferably, there are two guide sleeves, and the two guide sleeves are in contact with each other. The guide sleeves are provided to clamp and guide the output shaft of the speed regulating motor.
[0007] Preferably, an oil leakage hole is provided on the inner wall of the guide sleeve, a sponge block and a ramp block are slidably connected to the inner side of the guide sleeve, the sponge block and the ramp block are in contact, an adjusting rod is threadedly connected to the lower end of the guide sleeve, a knob is fixedly connected to one end of the adjusting rod, a ball is fixedly connected to the other end of the adjusting rod, and the ball contacts the ramp block. The adjusting rod can be moved in a vertical direction through the relative threaded movement between the adjusting rod and the guide sleeve, so that the ramp block is pushed by the ball at its bottom, and the ramp block squeezes out the lubricating oil stored in the sponge block to lubricate the output shaft.
[0008] Preferably, the inner wall of the guide sleeve is fixedly connected with a guide rod, the guide rod is slidably connected with the inclined surface block, a spring 1 is arranged inside the inclined surface block, one end of the spring 1 is fixedly connected with the guide rod, and the other end of the spring 1 is fixedly connected to the inner surface of the inclined surface block. The arrangement of the guide rod and the spring 1 can assist in resetting the inclined surface block.
[0009] Preferably, one end of the second spring is fixedly connected to the locking pin, and the other end of the second spring is fixedly connected to the inner surface of the tank cover. By setting the second spring, the elastic force can be applied to the locking pin.
[0010] Preferably, the pin body end section of the locking pin is fixedly connected with a lever, and the lever is slidably connected to the tank cover. The setting of the lever facilitates the horizontal pulling of the locking pin.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0012] 1. The utility model installs two guide sleeves on the outer side of the output shaft of the speed regulating motor. The guide sleeves can clamp and position the output shaft, so that the output shaft of the speed regulating motor can maintain stable rotation and the axis is not easily offset. The relative threaded movement between the adjusting rod and the guide sleeve can make the adjusting rod move in the vertical direction, so that the ball on the top of the adjusting rod pushes the inclined surface block, and the inclined surface block squeezes out the lubricating oil stored in the sponge block to lubricate the output shaft and reduce the friction between the guide sleeve and the output shaft.
[0013] 2. The utility model provides a connecting frame on the outer side of the guide sleeve, and a positioning block on the connecting frame. The positioning block can be inserted into the tank cover, and a locking pin that is retracted and extended by a spring is provided inside the tank cover. The locking pin is laterally inserted into the positioning block under the elastic force of the spring. In this way, the installation of the guide sleeve and the components on the guide sleeve on the tank cover can be completed by controlling the clutch between the locking pin and the positioning block. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;
[0015] Figure 2 For the utility model Figure 1 A front cross-sectional view of
[0016] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A;
[0017] Figure 4 For the utility model Figure 3 Enlarged view of the guide sleeve structure
[0018] In the figure: 1. mixing tank; 2. tank cover; 3. speed regulating motor; 4. mixing shaft; 5. feeding port; 6. guide sleeve; 7. oil leakage hole; 8. sponge block; 9. inclined block; 10. guide rod; 11. spring 1; 12. adjusting rod; 13. ball; 14. knob; 15. connecting frame; 16. positioning block; 17. locking pin; 18. spring 2; 19. lever. DETAILED DESCRIPTION
[0019] 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.
[0020] See also Figure 1-4A variable frequency stepless speed regulating device for an asphalt mixing station comprises a mixing tank 1, a tank cover 2 is detachably mounted on the top of the mixing tank 1, a speed regulating motor 3 is fixedly mounted on the middle part of the upper end of the tank cover 2, the speed regulating motor 3 is a variable frequency stepless speed regulating motor, which belongs to the prior art, the output shaft of the speed regulating motor 3 passes through the tank cover 2 and is connected to the tank cover 2 through a bearing, the end of the output shaft is fixedly connected to a mixing shaft 4, a feed port 5 is fixedly connected to the inside of the tank cover 2 and located on the left side of the speed regulating motor 3, a guide sleeve 6 is slidably connected to the outer side of the shaft body of the output shaft, the number of the guide sleeves 6 is two, and the two guide sleeves 6 are in contact with each other. The guide sleeve 6 has a clamping and guiding function for the output shaft of the speed regulating motor 3. The guide sleeve 6 is fixedly connected to the outer side of the guide sleeve 6 with a connecting frame 15, and the vertical part of the connecting frame 15 is fixedly connected to a positioning block 16, which is plugged into the tank cover 2. The tank cover 2 is slidably connected to a locking pin 17, which is plugged into the positioning block 16. A spring 2 18 is provided inside the tank cover 2, and one end of the spring 2 18 is fixedly connected to the locking pin 17, and the other end of the spring 2 18 is fixedly connected to the inner surface of the tank cover 2. The spring 2 18 can be provided to act on the locking pin 17 through the provision of the spring 2 18, and the pin end of the locking pin 17 is fixedly connected to a lever 19, which is slidably connected to the tank cover 2. The provision of the lever 19 facilitates the lateral pulling of the locking pin 17.
[0021] The inner wall of the guide sleeve 6 is provided with an oil leakage hole 7, and the inner side of the guide sleeve 6 is slidably connected with a sponge block 8 and a ramp block 9, and the sponge block 8 and the ramp block 9 are in contact. The lower end of the guide sleeve 6 is internally connected with an adjusting rod 12 through a thread, and one end of the adjusting rod 12 is fixedly connected with a knob 14, and the other end of the adjusting rod 12 is fixedly connected with a ball 13, and the ball 13 is in conflict with the ramp block 9. Through the relative threaded movement between the adjusting rod 12 and the guide sleeve 6, the adjusting rod 12 can be moved in the vertical direction, so that the ramp block 9 is pushed by the ball 13 at its bottom, and the ramp block 9 squeezes out the lubricating oil stored in the sponge block 8 to lubricate the output shaft. The inner wall of the guide sleeve 6 is fixedly connected with a guide rod 10, and the guide rod 10 is slidably connected with the ramp block 9. A spring 11 is arranged inside the ramp block 9, and one end of the spring 11 is fixedly connected with the guide rod 10, and the other end of the spring 11 is fixedly connected to the inner surface of the ramp block 9. The arrangement of the guide rod 10 and the spring 11 can assist the ramp block 9 in resetting.
[0022] The specific implementation process of the utility model is as follows: when in use, the locking pin 17 is pulled laterally by the lever 19, so that the locking pin 17 moves laterally in the tank cover 2, and the spring 2 18 is compressed, and then the guide sleeve 6 is placed on the outside of the output shaft of the speed regulating motor 3, and the positioning block 16 is inserted into the tank cover 2, and then the lever 19 is released, the locking pin 17 will be reset under the elastic force of the spring 2 18, and inserted into the positioning block 16, and the installation of the guide sleeve 6 is completed at the same time. At this time, the output shaft will remain sufficiently stable under the joint clamping of the two guide sleeves 6, and the axis is not easy to deviate, and the adjusting rod 12 is rotated by the knob 14. The adjusting rod 12 can move in the vertical direction through the relative threaded movement with the guide sleeve 6, thereby pushing the inclined surface block 9 through the ball 13 on its top, and the inclined surface block 9 squeezes out the lubricating oil stored in the sponge block 8 to lubricate the output shaft and reduce the friction between the guide sleeve 6 and the output shaft.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A variable frequency stepless speed regulating device for an asphalt mixing plant, comprising a mixing tank (1), characterized in that: The top of the stirring tank (1) is detachably mounted with a tank cover (2), a speed regulating motor (3) is fixedly mounted at the middle of the upper end of the tank cover (2), an output shaft of the speed regulating motor (3) passes through the tank cover (2) and is connected to the tank cover (2) via a bearing, a stirring shaft (4) is fixedly connected to the end of the output shaft, a feeding port (5) is fixedly connected inside the tank cover (2) and located on the left side of the speed regulating motor (3), a guide sleeve (6) is slidably connected to the outer side of the shaft body of the output shaft, a connecting frame (15) is fixedly connected to the outer side of the guide sleeve (6), a positioning block (16) is fixedly connected to the vertical portion of the connecting frame (15), the positioning block (16) is plugged into the tank cover (2), a locking pin (17) is slidably connected to the inside of the tank cover (2), the locking pin (17) is plugged into the positioning block (16), and a spring 2 (18) is arranged inside the tank cover (2).
2. The variable frequency stepless speed regulating device for an asphalt mixing station according to claim 1 is characterized in that: The number of the guide sleeves (6) is two, and the two guide sleeves (6) are in contact with each other.
3. The variable frequency stepless speed regulating device for an asphalt mixing station according to claim 1 is characterized in that: The inner wall of the guide sleeve (6) is provided with an oil leakage hole (7), the inner side of the guide sleeve (6) is slidably connected with a sponge block (8) and a ramp block (9), the sponge block (8) and the ramp block (9) are in contact, the lower end of the guide sleeve (6) is internally connected with an adjusting rod (12) through a thread, one end of the adjusting rod (12) is fixedly connected with a knob (14), the other end of the adjusting rod (12) is fixedly connected with a ball (13), and the ball (13) is in contact with the ramp block (9).
4. The variable frequency stepless speed regulating device for an asphalt mixing station according to claim 1 is characterized in that: The inner wall of the guide sleeve (6) is fixedly connected with a guide rod (10), and the guide rod (10) is slidably connected with the inclined surface block (9). A spring (11) is arranged inside the inclined surface block (9), and one end of the spring (11) is fixedly connected with the guide rod (10), and the other end of the spring (11) is fixedly connected to the inner surface of the inclined surface block (9).
5. The variable frequency stepless speed regulating device for an asphalt mixing station according to claim 4 is characterized in that: One end of the second spring (18) is fixedly connected to the locking pin (17), and the other end of the second spring (18) is fixedly connected to the inner surface of the tank cover (2).
6. The variable frequency stepless speed regulating device for an asphalt mixing station according to claim 4 is characterized in that: The pin body end section of the locking pin (17) is fixedly connected to a lever (19), and the lever (19) is slidably connected to the tank cover (2).