Built-in driven electric roller

Abstract

The utility model discloses a built-in driven electric roller, which comprises a left fixed shaft, a left bearing seat, a roller, a motor, a driving block, a right fixed shaft and a right bearing seat, and is characterized in that the roller is circular, and an inner hole is a through hole with a polygonal structure; the appearance of the left bearing seat, the driving block and the right bearing seat is a polygon corresponding to the inner hole of the roller, and the left bearing seat, the driving block and the right bearing seat are all arranged in the inner hole of the roller and connected with the inner hole of the roller. According to the utility model, the roller inner hole and the driving block are arranged into a polygonal structure, so that the manufacturability of the roller structure is improved, the cost is reduced, the torque transmission capability is enhanced, and mass production is facilitated; the left fixing shaft and the right fixing shaft are arranged to be coaxial and are connected into a whole through the motor and the driving block, and the radial bearing capacity of the roller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics transportation, in particular to an electric roller with built-in drive. Background Art

[0002] At present, there are mainly two ways to drive the rollers in the domestic and foreign automatic conveying lines for roller materials: one is the traditional external drive, and the other is the newly developed built-in drive. Among them, the built-in drive has the characteristics of small structure, convenient installation and debugging, and low cost. Due to the significant advantages of the built-in drive in structure, it has become the technical development direction of the automatic conveying line for roller materials. At present, mature products have emerged in China. However, there are technical bottlenecks in the connection between the motor rotor and the roller. The products on the market now fix the motor stator and the fixed shaft on the frame. The rotor is fixedly connected with the driving block through the motor output shaft, and the driving block is fixedly connected with the roller. When working, the motor drives the roller to rotate through the driving block. There are three methods currently used in the way of fixedly connecting the driving block and the roller: one is the interference fit connection method. For example, in a patent ZL202223137225.0, an electric roller, paragraph 31 records that the driving mechanism includes a motor, one end of the motor is connected with a connecting wheel (i.e., the driving block in this patent), and the connecting wheel is in interference fit with the cylinder body. The advantage of this method is simple structure, but the disadvantages are high machining accuracy, great difficulty, difficult assembly, high cost, and small transmitted torque. The second is the integral structure method, that is, the driving block and the roller are designed as an integral body. For example, in ZL202220362340.9, a motor built-in electric roller, paragraph 31 records that the roller is provided with a shaft hole, the shaft hole is provided with a keyway, the output shaft of the reduction device is inserted into the shaft hole, the output shaft of the reduction device is connected with a flat key, and the flat key is connected with the keyway to achieve fixed connection. See the patent appendix Figure 1 .. The advantage of this method is simple structure, but the disadvantages are complex processing technology, especially greater difficulty in keyway processing and high cost. The third is the welding method, that is, the driving block and the roller are connected as an integral body by welding, which is the method commonly used now. The advantage of this method is that the cost is lower than the previous two methods, but the disadvantages are that the welding operation space in the inner hole of the roller is small, the difficulty is great, and the quality is not easy to control. To sum up, the existing methods all have the defects of poor structural manufacturability, high cost, and being not conducive to mass production.

[0003] In the prior art, the left fixed shaft and the right fixed shaft are axially separated from each other, reducing the radial load-bearing capacity of the roller under the same size condition. For example, in ZL201920373240.4, a servo motor roller assembly, see the patent appendix Figure 1 . Summary of the Utility Model

[0004] The purpose of the present utility model is to provide an in-built drive electric roller in view of the defects and deficiencies of the prior art, so as to solve the problems mentioned in the above background art.

[0005] The above technical object of the present utility model is achieved through the following technical solutions: An in-built drive electric roller includes a left fixed shaft, a left bearing seat, a roller, a motor, a drive block, a right fixed shaft and a right bearing seat, and is characterized in that: the outer shape of the roller is circular, and the inner hole is a through hole with a polygonal structure; the outer shapes of the left bearing seat, the drive block and the right bearing seat are polygons corresponding to the inner hole of the roller, and are all arranged in the inner hole of the roller and are respectively connected to the inner hole of the roller. During operation, the output shaft of the motor drives the drive block, and the drive block transmits the torque to the roller through the polygonal connection with the roller, realizing the rotation of the roller.

[0006] Preferably, the left fixed shaft is fixedly connected to the stator of the motor, bearing the reaction torque during the operation of the roller.

[0007] Preferably, there is a gap between the inner hole of the roller and the outer shape of the stator of the motor. During operation, the stator of the motor remains stationary to prevent interference between the inner hole of the roller and the outer shape of the stator of the motor.

[0008] Preferably, a cable through hole is provided on the left fixed shaft for passing through the motor control cable.

[0009] Preferably, the output shaft of the motor is fixedly connected to the drive block, which can be realized by conventional means such as keys or flat shafts, so as to transmit the torque of the motor to the drive block.

[0010] Preferably, the right fixed shaft is rotatably connected to the drive block, realizing the support of the right fixed shaft without interfering with the movement of the drive block.

[0011] Preferably, the left bearing seat, the drive block and the right bearing seat are all provided with ventilation through holes in the axial direction, playing a role in dissipating the heat generated during the operation of the motor.

[0012] Preferably, the left fixed shaft and the right fixed shaft are fixedly connected to the frame, bearing the load during the operation of the roller.

[0013] Preferably, the motor further includes a reducer to achieve the required conveying speed.

[0014] Preferably, the left fixed shaft and the right fixed shaft are coaxial and are connected as a whole through the motor and the drive block, enhancing the radial load-bearing capacity of the roller.

[0015] The advantages of the present utility model are as follows:

[0016] 1. The inner hole of the drum and the outer shape of the driving block of the present utility model are set as a polygonal structure, which improves the structural manufacturability of the drum, reduces costs, enhances the torque transmission ability, facilitates assembly and maintenance, and is conducive to mass production.

[0017] 2. The left fixed shaft and the right fixed shaft of the present utility model are set coaxially and are connected as a whole through the motor and the driving block, which improves the radial bearing capacity of the drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] As shown in the figure: 1 - left fixed shaft; 2 - left bearing seat; 3 - drum, 4 - motor; 4-1 cable; 4-2 motor output shaft; 5 - driving block; 6 - right fixed shaft; 7 - right bearing seat. DETAILED DESCRIPTION OF THE INVENTION

[0020] For a more intuitive and complete understanding of the technical solution of the present utility model, the non-limiting feature description is as follows in combination with the drawings of the present utility model:

[0021] As Figure 1 shown, an in-built drive electric drum of the present utility model includes a left fixed shaft 1, a left bearing seat 2, a drum 3, a motor 4, a driving block 5, a right fixed shaft 6 and a right bearing seat 7, and is characterized in that: the outer shape of the drum 3 is circular, and the inner hole is a through hole with a polygonal structure; the outer shapes of the left bearing seat 2, the driving block 5 and the right bearing seat 7 are polygons corresponding to the inner hole of the drum 3, and are all arranged in the inner hole of the drum 3 and are respectively connected to the inner hole of the drum 3. During operation, the motor output shaft 4-2 drives the driving block 5, and the driving block 5 transmits the torque to the drum 3 through the polygonal connection with the drum 3, realizing the rotation of the drum 3. Bearings are respectively arranged between the left fixed shaft 1 and the left bearing seat 2 and between the right fixed shaft 6 and the driving block 5 and the right bearing seat 7.

[0022] The left fixed shaft 1 of the present utility model is fixedly connected to the stator of the motor 4 and bears the reaction torque during the operation of the drum 3.

[0023] A gap is provided between the inner hole of the drum 3 of the present utility model and the outer shape of the stator of the motor 4. During operation, the stator of the motor 4 remains stationary to prevent interference between the inner hole of the drum 3 and the outer shape of the stator of the motor 4.

[0024] A cable through hole (not shown in the figure) is provided on the left fixed shaft 1 of the present utility model for passing through the motor control cable.

[0025] The output shaft 4-2 of the motor of the present utility model is fixedly connected to the driving block 5, and can be realized by conventional means such as keys or flat shafts, so as to transmit the torque of the motor 4 to the driving block 5.

[0026] The right fixed shaft 6 of the present utility model is rotatably connected to the driving block 5 to support the right fixed shaft 6 without interfering with the movement of the driving block 5.

[0027] The left bearing seat 1, the driving block 5, and the right bearing seat 7 of the present utility model are all provided with ventilation through holes in the axial direction to dissipate the heat generated during the operation of the motor 4.

[0028] The left fixed shaft 1 and the right fixed shaft 6 of the present utility model are fixedly connected to the frame to bear the load during the operation of the roller 3.

[0029] The motor 4 of the present utility model further includes a speed reducer to achieve the required conveying speed.

[0030] The left fixed shaft 1 and the right fixed shaft 6 of the present utility model are coaxial and are connected as a whole through the motor 4 and the driving block 5 to enhance the radial load-bearing capacity of the roller 3.

[0031] During specific implementation, the roller 3 can be processed by steel die extrusion molding, and the left bearing seat 2, the driving block 5, and the right bearing seat 7 can be processed by die molding. To save costs, the left bearing seat 2 and the right bearing seat 7 can be designed with the same structural dimensions, and the left fixed shaft 1 and the right fixed shaft 6 can be processed by an automatic numerical control lathe, and the others are some standard parts. Therefore, the present utility model has a simple structure, good processability, low processing cost, and is suitable for mass production.

[0032] Those skilled in the art can make various modifications and changes to the present utility model. Therefore, the present utility model covers various modifications and changes that fall within the scope of the appended claims and their equivalents.

Claims

1. An electric drum with built-in drive, comprising a left fixed shaft, a left bearing seat, a drum, a motor, a driving block, a right fixed shaft and a right bearing seat, characterized in that: The outer shape of the drum is circular, and the inner hole is a through hole with a polygonal structure; the outer shapes of the left bearing seat, the driving block and the right bearing seat are polygons corresponding to the inner hole of the drum, and are all arranged in the inner hole of the drum and are respectively connected to the inner holes of the drum.

2. The internally driven electric drum according to claim 1, characterized in that: The left fixed shaft is fixedly connected to the stator of the motor.

3. The internally driven electric drum according to claim 1 or 2, characterized in that: A gap is provided between the inner hole of the drum and the stator shape of the motor.

4. The internally driven electric drum according to claim 1, characterized in that: The left fixed shaft is provided with a cable passing hole.

5. The internally driven electric drum according to claim 1, characterized in that: The output shaft of the motor is fixedly connected to the driving block.

6. The internally driven electric drum according to claim 1, characterized in that: The right fixed shaft is rotationally connected to the driving block.

7. The internally driven electric drum according to claim 1, characterized in that: The left bearing seat, the driving block and the right bearing seat are all provided with ventilation holes in the axial direction.

8. The internally driven electric drum according to claim 1, characterized in that: The left fixed shaft and the right fixed shaft are fixedly connected to the frame.

9. The internally driven electric drum according to claim 1, characterized in that: The motor further includes a speed reducer.

10. The internally driven electric drum according to claim 1, characterized in that: The left fixed shaft and the right fixed shaft are coaxial and connected as a whole through the motor and the driving block.

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