Automatic press fitting device for motor rotor bearing

Abstract

An automatic press-fitting device for a motor rotor bearing comprises a workbench, a rotor positioning seat, a bearing transfer table, a transfer table driving mechanism, a pushing mechanism, a bearing pressing head and a pressing head driving mechanism. The rotor positioning seat is arranged on the workbench and is used for placing a motor rotor; the bearing transfer table is movably arranged on the workbench, and the transfer table driving mechanism is connected with the bearing transfer table and used for driving the bearing transfer table to move between a receiving position and a feeding position; the pushing mechanism is used for pushing the to-be-assembled bearing into the bearing transfer table at the receiving position; the pressing head driving mechanism is connected with the bearing pressing head and used for driving the bearing pressing head to take out the bearing to be assembled from the bearing transfer table located at the feeding position and install the bearing to be assembled on a rotor shaft of the motor rotor. According to the utility model, automatic assembly of the motor rotor bearing is realized, the assembly efficiency is high, and the assembly effect is accurate and reliable.

Description

Technical Field

[0001] The utility model relates to a motor manufacturing technology, in particular to an assembly technology for a motor rotor bearing. Background Art

[0002] At present, in the field of power tool manufacturing, simple tooling is mostly used to install motor rotor bearings. This traditional assembly method has disadvantages such as inconvenient operation, low product qualification rate, and low assembly efficiency. Moreover, with the continuous increase in labor costs, it has become difficult to adapt to large-scale production. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an automatic press-fitting device for a motor rotor bearing, which can realize automatic assembly of the motor rotor bearing, has high assembly efficiency, and has accurate and reliable assembly effect.

[0004] An automatic press-fitting device for a motor rotor bearing according to an embodiment of the utility model comprises a workbench, a rotor positioning seat, a bearing transfer platform, a transfer platform driving mechanism, a pushing mechanism, a bearing pressure head and a pressure head driving mechanism; the rotor positioning seat is arranged on the workbench for placing the motor rotor; the bearing transfer platform is movably arranged on the workbench, and the transfer platform driving mechanism is connected to the bearing transfer platform for driving the bearing transfer platform to move between a material receiving position and a material feeding position; the pushing mechanism is used to push the bearing to be assembled into the bearing transfer platform at the material receiving position; the pressure head driving mechanism is connected to the bearing pressure head for driving the bearing pressure head to take out the bearing to be assembled from the bearing transfer platform at the material feeding position and to install the bearing to be assembled on the rotor shaft of the motor rotor.

[0005] The utility model has at least the following advantages:

[0006] 1. The assembly process of the automatic press-fitting device for the motor rotor bearing of the embodiment of the utility model reduces manual participation, has a high degree of automation, improves the assembly efficiency of the motor rotor bearing, and the assembly effect is accurate and reliable, which can meet the needs of large-scale production of motors and reduce manufacturing costs;

[0007] 2. The automatic press-fitting device for the motor rotor bearing of the embodiment of the utility model has a small overall volume and stable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The figure shows an axonometric schematic diagram of an automatic press-fitting device for a motor rotor bearing according to an embodiment of the utility model.

[0009] Figures 2 to 4 The front view, top view and left view of the automatic press-fitting device for the motor rotor bearing according to the embodiment of the utility model are respectively shown, wherein: Figures 2 to 4 The rotor stop has been removed. DETAILED DESCRIPTION

[0010] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0011] Please refer to Figures 1 to 4 The automatic press-fitting device for the motor rotor bearing according to the embodiment of the utility model comprises a workbench 1, a rotor positioning seat 21, a rotor limiting seat 22, a bearing transfer platform 3, a transfer platform driving mechanism 4, a pushing mechanism 5, a bearing pressing head 6 and a pressing head driving mechanism 7.

[0012] The rotor positioning seat 21 is arranged on the workbench 1, and is used to place the motor rotor 9. The motor rotor 9 has a rotor shaft 90, and the rotor shaft 90 needs to be installed with a bearing 10. In this embodiment, the motor rotor 9 is a motor rotor of an electric tool.

[0013] The rotor limiting seat 22 is disposed on the workbench 1 and close to the side of the rotor positioning seat 21 facing away from the bearing pressure head 6 , so as to limit the motor rotor 9 from moving in a direction away from the bearing pressure head 6 .

[0014] The bearing transfer platform 3 is movably arranged on the workbench 1, and the transfer platform driving mechanism 4 is connected to the bearing transfer platform 3 to drive the bearing transfer platform 3 to move between the material receiving position and the material feeding position. In this embodiment, the bearing transfer platform 3 is connected to the first slider 31, and the workbench 1 is provided with a first guide rail 11, and the first slider 31 is slidably matched with the first guide rail 11. The transfer platform driving mechanism 4 is composed of a transfer platform driving cylinder, and the push rod 41 of the transfer platform driving cylinder 4 is connected to the bearing transfer platform 3.

[0015] The pushing mechanism 5 is used to push the bearing 10 to be assembled into the bearing transfer platform 3 at the material receiving position. The pushing mechanism 5 includes a bearing push rod 51 and a push rod driving mechanism 52. The push rod driving mechanism 52 is connected to the bearing push rod 51 to drive the bearing push rod 51 to push the bearing 10 to be assembled into the bearing transfer platform 3 at the material receiving position. In this embodiment, the push rod driving mechanism 52 is composed of a rodless cylinder, the rodless cylinder 52 is arranged on the workbench 1, and the bearing push rod 51 is connected to the slide 521 of the rodless cylinder 52.

[0016] The pressure head driving mechanism 7 is connected to the bearing pressure head 6, and is used to drive the bearing pressure head 6 to take out the bearing 10 to be assembled from the bearing transfer table 3 in the feeding position and install the bearing 10 to be assembled on the rotor shaft 90 of the motor rotor 9. The pressure head driving mechanism 7 includes a lead screw 71, a nut slider 72 and a lead screw rotation driving mechanism, the nut slider 72 is spirally connected to the lead screw 71, and the lead screw rotation driving mechanism is used to drive the lead screw 71 to rotate. The bearing pressure head 6 is connected to the nut slider 72.

[0017] In a specific embodiment, the screw rotation drive mechanism includes a drive motor 73, a first pulley 74, a second pulley 75, and a belt 76 wound around the first pulley 74 and the second pulley 75. The drive motor 73 is arranged below the workbench 1 and connected to the first pulley 74. The second pulley 75 is connected to the screw 71 to drive the screw 71 to rotate synchronously. Preferably, the pressure head drive mechanism also includes a guide mechanism, which includes a pair of second guide rails 77 and a pair of second sliders 78, the pair of second guide rails 77 are arranged on the workbench 1, and the pair of second sliders 78 are respectively slidably matched with the pair of second guide rails 77, and are respectively connected to the two sides of the nut slider 72 to guide the movement of the bearing pressure head 6.

[0018] In this embodiment, a receiving groove 30 is provided on the side of the bearing transfer platform 3 facing the bearing press head 6, and the depth of the receiving groove 30 is less than the thickness of the bearing 10 to be assembled (i.e., the length of the bearing in the axial direction) so as to partially accommodate the bearing 10 pushed by the pushing mechanism 5. A step hole extending along the axial direction of the bearing press head is provided at the top of the bearing press head 6, and the step hole includes a large hole 61 located at the top of the bearing press head and a small hole 62 located behind the large hole 61, and a step surface 63 is formed between the large hole 61 and the small hole 62, and a magnet 64 is provided on the step surface 63 for adsorbing the bearing 10, and the depth of the large hole 61 is less than the thickness of the bearing 10 to be assembled so as to partially accommodate the bearing 10, and the diameter of the small hole 62 is larger than the diameter of the rotor shaft 90.

[0019] In a specific embodiment, the depth of the large hole 61 is equal to the depth of the small hole 62, and both are half the thickness of the bearing 10. The large hole 61 is loosely matched with the outer peripheral surface of the bearing to be assembled. There are multiple magnets 64. The surface of the step surface 63 is provided with a groove matched with the magnet 64, and the magnet 64 is embedded in the groove, and the surface of the magnet 64 is flush with the step surface 63.

[0020] Further, the motor rotor bearing automatic press-fitting device of this embodiment includes a storage bin assembly 8, which includes a storage bin body 81, a bin door 82, and a bin door switch mechanism 83. The storage bin body 81 is installed on the workbench 1, and the storage bin body 81 has an inlet 811, an outlet 812, and a material guide slope 813 located between the inlet 811 and the outlet 812, and the material guide slope 813 is used to carry the bearing 10 to be assembled. The bin door switch mechanism 83 is connected to the bin door 82, and is used to drive the bin door 82 to move upward or downward to open or close the outlet of the storage bin body 81.

[0021] In this embodiment, the guide slope 813 carries multiple rows of bearings 10 along the inclined direction of the guide slope. The storage bin assembly includes a blocking door 84 and a blocking door driving mechanism 85, the blocking door driving mechanism 85 is connected to the blocking door 84, and is used to drive the blocking door 84 to move up and down to switch between the open position and the blocking position; when the blocking door 84 moves downward to the blocking position, the blocking door 84 blocks the front side of the second row of bearings close to the bin door to prevent the second row of bearings from rolling along the guide slope 813 toward the outlet 812 of the storage bin body; when the blocking door 84 moves upward to the open position, the blocking door 84 is above the second row of bearings and no longer blocks the second row of bearings, so that the second row of bearings can roll along the guide slope 813 toward the outlet 812 of the storage bin body.

[0022] Optionally, the compartment door opening and closing mechanism 83 and the blocking door driving mechanism 85 are respectively composed of a cylinder.

[0023] During operation, multiple rows of bearings 10 are put into the storage bin body 81 in batches, and the blocking door driving mechanism 85 controls the blocking door to be in the blocking position, so that it is blocked between the two lowest rows of bearings near the outlet of the storage bin body. After the bin door switch mechanism 83 opens the bin door 82, the first row of bearings near the outlet 812 of the storage bin body 81 rolls from the outlet 812 to the workbench 1 and is blocked by the stop step 12 on the workbench 1. At this time, the first row of bearings is facing the receiving groove 30 of the bearing transfer platform 3 at the material receiving position. The rodless cylinder 52 drives the bearing push rod 51 to push forward, and the bearing push rod 51 pushes the tail of the first row of bearings, and makes a bearing at the head of the first row of bearings partially enter the receiving groove 30 of the bearing transfer platform 3. Subsequently, the push rod 41 of the transfer platform driving cylinder 4 retracts, bringing the bearing transfer platform 3 to the feeding position, in which the receiving groove 30 of the bearing transfer platform 3 is facing the bearing pressure head 6. The pressure head driving mechanism 7 drives the bearing pressure head 6 to move forward from the initial position, and with the help of the magnetic attraction of the magnet 64, the bearing 10 in the receiving groove of the bearing transfer platform 3 at the feeding position is sucked into the large hole 61 of the bearing pressure head 6. Subsequently, the push rod 41 of the transfer platform driving cylinder 4 is extended to return the bearing transfer platform 3 to the material receiving position. After that, the pressure head driving mechanism 7 drives the bearing pressure head 6 to move forward, press the bearing 10 into the bearing position of the motor rotor 9 (at this time, the front part of the rotor shaft 90 is inserted into the small hole 62), and then drives the bearing pressure head 6 to retreat and return to the initial position. After that, the rodless cylinder 52 drives the bearing push rod 51 to push forward again, so that a bearing at the head of the first row of bearings partially enters the receiving groove 30 of the bearing transfer platform 3, and the above steps are repeated.

[0024] In this embodiment, the actions of the transfer platform driving mechanism 4, the pushing mechanism 5 (the pushing rod driving mechanism 52), the pressure head driving mechanism 7, the bin door opening and closing mechanism 83 and the blocking door driving mechanism 85 are controlled by the PLC controller.

[0025] The embodiment of the utility model realizes the automatic assembly of the motor rotor bearing, has high assembly efficiency, accurate and reliable assembly effect, and greatly reduces the labor cost.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An automatic press-fit device for a motor rotor bearing, characterized in that: It includes a workbench, a rotor positioning seat, a bearing transfer table, a transfer table driving mechanism, a material pushing mechanism, a bearing pressure head and a pressure head driving mechanism; The rotor positioning seat is arranged on the workbench and is used to place the motor rotor; The bearing transfer platform is movably arranged on the workbench, and the transfer platform driving mechanism is connected to the bearing transfer platform to drive the bearing transfer platform to move between a material receiving position and a material feeding position; The pushing mechanism is used to push the bearing to be assembled into the bearing transfer platform at the material receiving position; The pressure head driving mechanism is connected to the bearing pressure head and is used to drive the bearing pressure head to take out the bearing to be assembled from the bearing transfer platform at the feeding position and to install the bearing to be assembled on the rotor shaft of the motor rotor.

2. The automatic press-fitting device for the motor rotor bearing according to claim 1, characterized in that: A receiving groove is provided on one side of the bearing transfer platform facing the bearing pressure head, and the depth of the receiving groove is less than the thickness of the bearing to be assembled so as to partially receive the bearing pushed by the pushing mechanism; A step hole extending axially along the bearing pressure head is provided at the top end of the bearing pressure head, the step hole includes a large hole located at the top end of the bearing pressure head and a small hole located behind the large hole, a step surface is formed between the large hole and the small hole, a magnet is provided on the step surface, the depth of the large hole is less than the thickness of the bearing to be assembled so as to partially accommodate the bearing, and the diameter of the small hole is greater than the diameter of the rotor shaft.

3. The automatic press-fitting device for the motor rotor bearing according to claim 1 or 2, characterized in that: The pushing mechanism comprises a bearing push rod and a push rod driving mechanism, wherein the push rod driving mechanism is connected to the bearing push rod and is used to drive the bearing push rod to push the bearing to be assembled into the bearing transfer platform at the material receiving position.

4. The automatic press-fitting device for the motor rotor bearing according to claim 3, characterized in that: The push rod driving mechanism comprises a rodless cylinder, the rodless cylinder is arranged on the workbench, and the bearing push rod is connected to the slide table of the rodless cylinder.

5. The automatic press-fitting device for the motor rotor bearing according to claim 1, characterized in that: The motor rotor bearing automatic press-fitting device comprises a storage bin assembly, and the storage bin assembly comprises a storage bin body, a bin door, and a bin door switch mechanism; The material storage bin body is installed on the workbench, and the material storage bin body has an entrance, an exit and a material guide slope located between the entrance and the exit, and the material guide slope is used to carry the bearing to be assembled; the bin door switch mechanism is connected to the bin door, and is used to drive the bin door to move upward or downward to open or close the outlet of the material storage bin body.

6. The automatic press-fitting device for the motor rotor bearing according to claim 5, characterized in that: The material guiding inclined surface carries multiple rows of bearings along the inclined direction of the material guiding inclined surface; The material storage bin assembly includes a blocking door and a blocking door driving mechanism, wherein the blocking door driving mechanism is connected to the blocking door and is used to drive the blocking door to move up and down to switch between an open position and a blocking position; when the blocking door moves downward to the blocking position, the blocking door blocks the front side of the second row of bearings close to the bin door to prevent the second row of bearings from rolling along the material guide ramp toward the outlet of the material storage bin body; when the blocking door moves upward to the open position, the blocking door is above the second row of bearings to enable the second row of bearings to roll along the material guide ramp toward the outlet of the material storage bin body.

7. The automatic press-fitting device for the motor rotor bearing according to claim 1, characterized in that: The bearing transfer platform is connected to the first slide block, the workbench is provided with a first guide rail, and the first slide block is slidably matched with the first guide rail; The transfer platform driving mechanism comprises a transfer platform driving cylinder, and a push rod of the transfer platform driving cylinder is connected to the bearing transfer platform.

8. The automatic press-fitting device for the motor rotor bearing according to claim 1, characterized in that: The pressure head driving mechanism comprises a lead screw, a nut slider and a lead screw rotation driving mechanism, the nut slider is spirally connected to the lead screw, and the lead screw rotation driving mechanism is used to drive the lead screw to rotate; The bearing pressure head is connected to the nut slider.

9. The automatic press-fitting device for the motor rotor bearing according to claim 8, characterized in that: The pressure head driving mechanism includes a guiding mechanism, which includes a pair of second guide rails and a pair of second sliders. The pair of second guide rails are arranged on the workbench, and the pair of second sliders are respectively slidably matched with the pair of second guide rails and are respectively connected to both sides of the nut slider.

10. The automatic press-fitting device for motor rotor bearings according to claim 1, characterized in that: The motor rotor bearing automatic press-fitting device comprises a rotor limit seat, which is arranged on the workbench and close to the side of the rotor positioning seat facing away from the bearing pressure head to limit the motor rotor from moving in a direction away from the bearing pressure head.

Images