A motor rotor press-fitting tool and corresponding installation method

Abstract

The present invention provides a motor rotor press-fitting tool, which has low cost, small occupied area, quick assembly and positioning, high assembly efficiency, and meets mass production requirements. An upper convex positioning ring sleeve is arranged at the center of the base, and a plurality of concave avoidance grooves are arranged around the upper end surface of the positioning ring sleeve, and a positioning threaded hole is arranged at the center of the avoidance groove. The positioning support includes a lower guide sleeve and an upper positioning sleeve. The inner ring cavity diameter of the lower guide sleeve is smaller than the diameter of the guide cavity of the upper positioning sleeve. The inner ring part of the upper end surface of the lower guide sleeve is provided with a concave positioning pin hole corresponding to the rivet hole position of the rotor core, and it also includes a matching positioning pin. The positioning pin is inserted into the concave positioning pin hole and then convex. The convex positioning pin is used for circumferential positioning of the rotor core. The lower guide sleeve is sleeved on the positioning ring sleeve, and a guide cavity is arranged between the inner ring cavity of the lower guide sleeve and the upper end surface of the positioning ring sleeve, and a guide ejector assembly is arranged in the guide cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of motor rotor assembly, in particular to a motor rotor press-fitting tool. The present invention also provides a corresponding motor rotor assembly method. Background Art

[0002] The motor rotor includes a motor shaft, a rotor core and two balancing end plates located on the end faces of the rotor core axis. During the assembly process of the existing motor rotor, different equipment at different workstations is required for combined assembly. The cost of assembling the motor rotor is high, the floor space is large, and multiple alignments are required during assembly, which results in low assembly efficiency and cannot meet mass production requirements. Summary of the invention

[0003] In view of the above problems, the present invention provides a motor rotor press-fitting tool, which has low cost, small occupied area, quick assembly and positioning, high assembly efficiency, and meets mass production requirements.

[0004] A motor rotor press-fitting tool, characterized in that it includes a base, a positioning support, a guide block, a guide ejector assembly, and a pressure head, wherein an upper convex positioning ring sleeve is arranged at the center of the base, a plurality of concave avoidance grooves are arranged around the upper end surface of the positioning ring sleeve, a positioning threaded hole is arranged at the center of the avoidance groove, the positioning support includes a lower guide sleeve and an upper positioning sleeve, the inner ring cavity diameter of the lower guide sleeve is smaller than the diameter of the guide cavity of the upper positioning sleeve, an inner ring portion of the upper end surface of the lower guide sleeve is provided with a concave positioning pin hole corresponding to the rivet hole position of the rotor core, and it also includes a matching positioning pin, The positioning pin is inserted into the concave positioning pin hole and then convex upward, and the convex positioning pin is used for circumferential positioning of the rotor core. The lower guide sleeve is sleeved on the positioning ring sleeve, and a guide cavity is provided between the inner ring cavity of the lower guide sleeve and the upper end surface of the positioning ring sleeve. A guide ejector assembly is arranged in the guide cavity, and the guide ejector assembly includes a guide ejector, a guide ejector mounting seat, and a linear spring. The bottom of the guide ejector is fixedly arranged on the guide ejector mounting seat, and the guide ejector protrudes from the through hole of the guide ejector mounting seat. The bottom of the guide ejector mounting seat is connected to the positioning threaded hole through a long bolt. The long bolt is sleeved with a corresponding linear spring, the bottom of the linear spring is embedded in the avoidance groove, the top of the linear spring is mounted on the guide ejector mounting seat or the bottom of the guide ejector, the upper pointed top part of the guide ejector protrudes into the guide cavity of the upper positioning sleeve, the upper pointed top part and the axis of the motor shaft to be assembled are coaxially arranged, the guide cavity of the upper positioning sleeve is used to place the rotor core, the upper surface of the upper positioning sleeve is evenly distributed with concave positioning pin holes and concave positioning holes, the guide block is specifically composed of two semi-circular guide blocks spliced ​​together, each of the semi-circular guide blocks corresponds to The concave positioning pin hole at the corresponding position is provided with a convex positioning pin, and a positioning light hole is provided corresponding to the concave positioning hole. The connecting bolt passes through the corresponding positioning light hole and the concave positioning hole. The two semi-circular ring guide blocks after assembly form a central guide hole with keys on both sides. After the keyway of the motor shaft is arranged along the key, the motor shaft is inserted into the central guide hole. The outer diameter of the balancing end plate is smaller than the distance from the inner edge of the connecting bolt to the central axis of the central guide hole, so that the semi-circular ring guide block is easy to disassemble and assemble; the pressure head includes a top plane and a bottom cone head structure, and the bottom cone head structure is inserted into the inner hole of the motor shaft and fits the corresponding cone cavity arrangement of the inner hole.

[0005] The further feature is that the upper positioning sleeve is composed of a plurality of upward convex fan-shaped blocks, and a gap is left between adjacent fan-shaped blocks to facilitate observation by workers during operation;

[0006] The bottom of the guide ejector mounting seat is concave to form a triangular mounting groove, the bottom of the guide ejector is a triangular mounting plate, the triangular mounting plate is built into the triangular mounting groove, and the triangular mounting plate is fixedly connected to the guide ejector mounting seat by bolts;

[0007] The maximum compression amount of the linear spring is greater than the maximum displacement that can be pressed down when the motor shaft is press-fitted, ensuring smooth assembly of the motor shaft.

[0008] A method for press-fitting a motor rotor, characterized in that the motor shaft is first press-fitted to a first balancing end plate, then the motor shaft and the rotor core are press-fitted, and finally the motor shaft with the first balancing end plate, the rotor core and the second balancing end plate are press-fitted.

[0009] It is further characterized by:

[0010] The specific steps of press-fitting the motor shaft to the first balancing end plate are as follows: the locating pin on the locating support is not installed, the iron core contact surface of the first balancing end plate faces downward and is placed on the upper end surface of the lower guide sleeve. After the tooling is installed, the press head starts to press down. When the first balancing end plate is pressed to the installation shaft section where the motor shaft is located, the shaft section with the largest diameter of the motor shaft has not yet contacted the guide block. The press head is retracted, the two semi-circular guide blocks are removed, and then the motor shaft is press-fitted again until the first balancing end plate is pressed into place.

[0011] The specific steps of press-fitting the motor shaft and the rotor core are as follows: install the two positioning pins on the positioning support, put the entire rotor core into the positioning support, and position it axially through the positioning shaft. After the tooling is installed, start pressing down. When the rotor core is pressed to the installation shaft section on the motor shaft, the balance end plate has not yet contacted the two guide blocks. Retract the press head, remove the two semi-circular guide blocks, and then press-fit the motor shaft again until the rotor core is pressed into place.

[0012] The specific steps of press-fitting the motor shaft with the first balancing end plate, the rotor core and the second balancing end plate are as follows: remove the positioning pin on the positioning support, place the second balancing end plate core contact surface upward on the upper end surface of the lower guide sleeve, and start pressing down after the tooling is installed. When the second balancing end plate is pressed to the installation shaft section on the motor shaft, the rotor core has not yet contacted the guide block. Retract the press head, remove the two semi-circular ring guide blocks, and then press-fit the motor shaft again until the second balancing end plate is pressed into place.

[0013] After adopting the above technical scheme, the vertical centering and guiding of the motor shaft are achieved by splicing two semicircular ring guide blocks and the spring guide ejector pin assembly; the rotor core positioning support and the tooling base are only connected by a set, and are movable and detachable. If the motor shaft is long and the spring compression is insufficient, the base assembly can be removed after the motor shaft is pressed in a certain distance, and then the press-fitting can be continued; it has low cost, small occupied area, quick assembly and positioning, high assembly efficiency, and meets mass production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention (including the first balancing end plate of the motor and the motor shaft);

[0015] Figure 2 for Figure 1 A schematic diagram of a sectional structure of a front view;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the positioning support of the present invention;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the base of the present invention;

[0018] Figure 5 It is an assembly stereogram of the base and the guide ejector pin assembly of the present invention;

[0019] Figure 6 It is a schematic diagram of an exploded view of a guide ejector pin and a guide ejector pin mounting seat of the present invention;

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the pressure head of the present invention;

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of the guide block of the present invention assembled on the positioning support;

[0022] The names corresponding to the serial numbers in the figure are as follows:

[0023] Base 1, upper convex positioning ring sleeve 11, concave avoidance groove 12, positioning threaded hole 13, positioning support 2, lower guide sleeve 21, concave positioning pin hole 211, upper positioning sleeve 22, concave positioning pin hole 221, concave positioning hole 222, upper convex sector block 23, spacer 24, guide block 3, semicircular ring guide block 31, lower convex positioning pin 311, positioning light hole 312, connecting bolt 32, key 33, center guide hole 34, guide ejector assembly 4, guide ejector 41, upper pointed top part 411, triangular mounting plate 412, guide ejector mounting seat 42, triangular mounting groove 422, through hole 421, linear spring 43, long bolt 44, pressure head 5, top plane 51, bottom cone head structure 52, rotor core 6, positioning pin 7, guide cavity 8, motor shaft 9, balancing end plate 10. DETAILED DESCRIPTION

[0024] A motor rotor press-fitting tool, see Figure 1-Figure 8It includes a base 1, a positioning support 2, a guide block 3, a guide ejector assembly 4, and a pressure head 5. The center of the base 1 is provided with an upper convex positioning ring sleeve 11, and the upper end surface of the positioning ring sleeve 11 is surrounded by a plurality of concave avoidance grooves 12. The center of the avoidance groove 12 is provided with a positioning threaded hole 13. The positioning support 2 includes a lower guide sleeve 21 and an upper positioning sleeve 22. The inner ring cavity diameter of the lower guide sleeve 21 is smaller than the diameter of the guide cavity of the upper positioning sleeve 22. The inner ring portion of the upper end surface of the lower guide sleeve 21 is provided with a concave positioning pin hole 211 corresponding to the rivet hole position of the rotor core 6. It also includes a matching positioning pin 7. The positioning pin 7 is inserted into the concave positioning pin hole 211. The convex positioning pin 7 is used for circumferential positioning of the rotor core 6. The lower guide sleeve 21 is sleeved on the positioning ring sleeve 11. A guide cavity 8 is provided between the inner ring cavity of the lower guide sleeve 21 and the upper end surface of the positioning ring sleeve 11. A guide ejector assembly 4 is arranged in the guide cavity 8. The guide ejector assembly 4 includes a guide ejector 41, a guide ejector mounting seat 42, and a linear spring 43. The bottom of the guide ejector 41 is fixed to the guide ejector mounting seat 42. The guide ejector 41 is protruding from the through hole 421 of the guide ejector mounting seat 42. The bottom of the guide ejector mounting seat 42 is connected to the positioning threaded hole 13 through a long bolt 44. The long bolt 44 is sleeved with a corresponding linear spring 43. The bottom of the spring 43 is embedded in the avoidance groove 12, and the top of the linear spring 43 is mounted on the guide ejector mounting seat 42 or the bottom of the guide ejector 41. The upper pointed top portion 411 of the guide ejector 41 protrudes into the guide cavity of the upper positioning sleeve 22. The upper pointed top portion 411 and the axis of the motor shaft 9 to be assembled are coaxially arranged. The guide cavity of the upper positioning sleeve 22 is used to place the rotor core 6. The upper surface of the upper positioning sleeve 22 is evenly distributed with concave positioning pin holes 221 and concave positioning holes 222. The guide block 3 is specifically composed of two semi-circular guide blocks 31 spliced ​​together, and each semi-circular guide block 31 is provided with a convex positioning pin 3 corresponding to the concave positioning pin hole 221 at the corresponding position. 11. A positioning light hole 312 is provided corresponding to the concave positioning hole 222, and the connecting bolt 32 passes through the corresponding positioning light hole 312 and the concave positioning hole 222. The two semi-circular ring guide blocks 31 after assembly form a central guide hole 34 with keys 33 on both sides. After the keyway of the motor shaft 9 is arranged along the key 33, the motor shaft 9 is inserted into the central guide hole 34. The outer diameter of the balancing end plate 10 is smaller than the distance from the inner edge of the connecting bolt 32 to the central axis of the central guide hole 34, so that the semi-circular ring guide block 31 is easy to disassemble and assemble; the pressure head 5 includes a top plane 51 and a bottom cone head structure 52. The bottom cone head structure 52 is inserted into the inner hole of the motor shaft 9 and is arranged in a corresponding cone cavity that fits the inner hole.

[0025] The upper positioning sleeve 22 is composed of a plurality of upward convex sector blocks 23, and a gap 24 is left between adjacent sector blocks 23 to facilitate observation by workers during operation;

[0026] The bottom of the guide ejector mounting seat 42 is concave to form a triangular mounting groove 422. The bottom of the guide ejector 41 is a triangular mounting plate 412. The triangular mounting plate 412 is built into the triangular mounting groove 422. The triangular mounting plate 412 is fixedly connected to the guide ejector mounting seat 42 by bolts.

[0027] The maximum compression amount of the linear spring 43 is greater than the maximum displacement that can be pressed down when the motor shaft 9 is press-fitted, ensuring smooth assembly of the motor shaft.

[0028] A method for press-fitting a motor rotor: first press-fitting a motor shaft to a first balancing end plate, then press-fitting the motor shaft and a rotor core, and finally press-fitting the motor shaft with the first balancing end plate, the rotor core and a second balancing end plate.

[0029] The specific steps of press-fitting the motor shaft to the first balancing end plate are as follows: the locating pin on the locating support is not installed, the iron core contact surface of the first balancing end plate faces downward and is placed on the upper end surface of the lower guide sleeve. After the tooling is installed, the press head starts to press down. When the first balancing end plate is pressed to the installation shaft section where the motor shaft is located, the shaft section with the largest diameter of the motor shaft has not yet contacted the guide block. The press head is retracted, the two semi-circular guide blocks are removed, and then the motor shaft is press-fitted again until the first balancing end plate is pressed into place.

[0030] The specific steps of press-fitting the motor shaft and the rotor core are as follows: install the two positioning pins on the positioning support, put the entire rotor core into the positioning support, and position it axially through the positioning shaft. After the tooling is installed, start pressing down. When the rotor core is pressed to the installation shaft section on the motor shaft, the balance end plate has not yet contacted the two guide blocks. Retract the press head, remove the two semi-circular guide blocks, and then press-fit the motor shaft again until the rotor core is pressed into place.

[0031] The specific steps of press-fitting the motor shaft with the first balancing end plate, the rotor core and the second balancing end plate are as follows: remove the positioning pin on the positioning support, place the second balancing end plate core contact surface upward on the upper end surface of the lower guide sleeve, and start pressing down after the tooling is installed. When the second balancing end plate is pressed to the installation shaft section on the motor shaft, the rotor core has not yet contacted the guide block. Retract the press head, remove the two semi-circular ring guide blocks, and then press-fit the motor shaft again until the second balancing end plate is pressed into place.

[0032] It realizes the vertical centering and guiding of the motor shaft through two spliced ​​semicircular guide blocks and a spring guide ejector pin assembly; the rotor core positioning support and the tooling base are only connected by a set and are movable and detachable. If the motor shaft is long and the spring compression is insufficient, the base assembly can be removed after the motor shaft is pressed in a certain distance, and then the press-fitting can be continued; it has low cost, small footprint, quick assembly and positioning, high assembly efficiency, and meets mass production needs.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0034] 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 motor rotor press-fitting tool, Features: It includes a base, a positioning support, a guide block, a guide ejector pin assembly, and a pressure head. The center of the base is provided with an upper convex positioning ring sleeve, the upper end surface of the positioning ring sleeve is surrounded by a plurality of concave avoidance grooves, and the center of the avoidance groove is provided with a positioning threaded hole. The positioning support includes a lower guide sleeve and an upper positioning sleeve. The inner ring cavity diameter of the lower guide sleeve is smaller than the diameter of the guide cavity of the upper positioning sleeve. The inner ring part of the upper end surface of the lower guide sleeve is provided with a concave positioning pin hole corresponding to the rivet hole position of the rotor core. It also includes a matching positioning pin, and the positioning pin is inserted into the concave positioning pin. The positioning pin hole is convex at the rear, and the convex positioning pin is used for circumferential positioning of the rotor core. The lower guide sleeve is sleeved on the positioning ring sleeve, and a guide cavity is provided between the inner ring cavity of the lower guide sleeve and the upper end surface of the positioning ring sleeve. A guide ejector assembly is arranged in the guide cavity, and the guide ejector assembly comprises a guide ejector, a guide ejector mounting seat, and a linear spring. The bottom of the guide ejector is fixedly arranged on the guide ejector mounting seat, and the guide ejector protrudes from the through hole of the guide ejector mounting seat. The bottom of the guide ejector mounting seat is connected to the positioning threaded hole through a long bolt, and the long bolt is sleeved on There is a corresponding linear spring, the bottom of the linear spring is embedded in the avoidance groove, the top of the linear spring is mounted on the guide ejector mounting seat or the bottom of the guide ejector, the upper pointed top part of the guide ejector protrudes into the guide cavity of the upper positioning sleeve, the upper pointed top part and the axis of the motor shaft to be assembled are coaxially arranged, the guide cavity of the upper positioning sleeve is used to place the rotor core, the upper surface of the upper positioning sleeve is evenly distributed with concave positioning pin holes and concave positioning holes, the guide block is specifically composed of two semi-circular guide blocks spliced ​​together, each of the semi-circular guide blocks corresponds to the corresponding position The concave positioning pin hole is provided with a convex positioning pin, and a positioning light hole is provided corresponding to the concave positioning hole. The connecting bolt passes through the corresponding positioning light hole and the concave positioning hole. The two semi-circular ring guide blocks after assembly form a central guide hole with keys on both sides. After the keyway of the motor shaft is arranged along the key, the motor shaft is inserted into the central guide hole. The outer diameter of the balancing end plate is smaller than the distance from the inner edge of the connecting bolt to the central axis of the central guide hole, so that the semi-circular ring guide block is easy to disassemble and assemble; the pressure head includes a top plane and a bottom cone head structure, and the bottom cone head structure is inserted into the inner hole of the motor shaft and fits the corresponding cone cavity arrangement of the inner hole.

2. A motor rotor press-fitting tool as claimed in claim 1, Features: The upper positioning sleeve is formed by splicing a plurality of upward convex sector-shaped blocks, and intervals are left between adjacent sector-shaped blocks.

3. A motor rotor press-fitting tool as claimed in claim 1, Features: The bottom of the guide ejector mounting seat is concave to form a triangular mounting groove. The bottom of the guide ejector is a triangular mounting plate. The triangular mounting plate is built into the triangular mounting groove. The triangular mounting plate is fixedly connected to the guide ejector mounting seat by bolts.

4. A motor rotor press-fitting tool as claimed in claim 1, Features: The maximum compression amount of the linear spring is greater than the maximum displacement that can be pressed downward when the motor shaft is press-fitted.

5. A method for press-fitting a motor rotor, using a motor rotor press-fitting tool as claimed in any one of claims 1 to 4, Features: First, the motor shaft is press-fitted onto the first balancing end plate, then the motor shaft and the rotor core are press-fitted, and finally the motor shaft with the first balancing end plate, the rotor core and the second balancing end plate are press-fitted.

6. A method for press-fitting a motor rotor as claimed in claim 5, Features: The specific steps of press-fitting the motor shaft to the first balancing end plate are as follows: the locating pin on the locating support is not installed, the iron core contact surface of the first balancing end plate faces downward and is placed on the upper end surface of the lower guide sleeve. After the tooling installation is completed, the pressing head begins to press down. When the first balancing end plate is pressed to the installation shaft section where the motor shaft is located, the shaft section with the largest diameter of the motor shaft has not yet contacted the guide block. The press head is retracted, the two semicircular guide blocks are removed, and then the motor shaft is press-fitted again until the first balancing end plate is pressed into place.

7. A method for press-fitting a motor rotor as claimed in claim 5, Features: The specific steps for press-fitting the motor shaft and rotor core are as follows: install the two locating pins on the locating support, place the entire rotor core on the locating support, and axially position it through the locating shaft. After the tooling is installed, start pressing down. When the rotor core is pressed onto the installation shaft section on the motor shaft, the balancing end plate has not yet contacted the two guide blocks. Retract the press head, remove the two semicircular guide blocks, and then press-fit the motor shaft again until the rotor core is pressed into place.

8. A method for press-fitting a motor rotor as claimed in claim 5, Features: The specific steps of press-fitting the motor shaft with the first balancing end plate, the rotor core and the second balancing end plate are as follows: remove the positioning pin on the positioning support, place the second balancing end plate core contact surface upward on the upper end surface of the lower guide sleeve, and start pressing down after the tooling is installed. When the second balancing end plate is pressed to the installation shaft section on the motor shaft, the rotor core has not yet contacted the guide block. Retract the press head, remove the two semi-circular ring guide blocks, and then press-fit the motor shaft again until the second balancing end plate is pressed into place.

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