Neutral terminal hot riveting machine

By using rotary positioning components and terminal components in motor automation assembly equipment, the problem of inaccurate stator position and rotation angle is solved, the assembly accuracy and efficiency are improved, and labor costs are reduced.

CN222851811UActive Publication Date: 2025-05-09SHENZHEN HONEST MECHATRONIC EQUIP CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421837306.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-31
Publication Date
2025-05-09
Estimated Expiration
2034-07-31

AI Technical Summary

Technical Problem

In the prior art, rotary positioning components are not used during the assembly of the motor stator, resulting in inaccurate stator position and rotation angle, affecting the accuracy of neutral terminal assembly, high defect rate, and high cost of manual installation of terminals.

Method used

The rotary positioning assembly and the terminal assembly are adopted to realize the precise position and rotation angle positioning of the stator through the rotary positioning assembly. The terminal assembly automatically installs the neutral terminal into the stator.

Benefits of technology

It improves the accuracy of neutral terminal assembly, reduces defective rate, reduces manual operation costs, and realizes automated production.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222851811U_ABST
    Figure CN222851811U_ABST
Patent Text Reader

Abstract

The utility model discloses a neutral terminal hot riveting machine, and relates to the technical field of automatic motor assembling equipment. The neutral terminal hot riveting machine comprises a workbench, a transfer mechanism used for transferring a stator, an assembling mechanism used for assembling a neutral terminal into the stator, a hot riveting mechanism used for hot riveting the neutral terminal into the stator, and a detection mechanism used for detecting whether the hot riveting height is qualified or not. The assembling mechanism, the hot riveting mechanism and the detecting mechanism are sequentially distributed in the transferring direction of the transferring mechanism. The assembling mechanism comprises a rotary positioning assembly used for positioning the stator and a terminal assembling assembly used for assembling the neutral terminal into the stator. The position movement and the rotation angle of the stator are realized by adopting the rotary positioning assembly, the accurate positioning of the stator is realized, the position accuracy when the neutral terminal is assembled is ensured, the defective rate is reduced, and the assembly accuracy is improved; and the neutral terminal is mounted in the stator through the terminal mounting assembly, so that the labor cost is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the field technology of motor automatic assembly equipment, in particular to a neutral terminal hot riveting machine. Background Art

[0002] The motor has a stator. When assembling the stator, the neutral terminal needs to be assembled in the stator first, and then the neutral terminal and the stator are hot-riveted so that the neutral terminal is tightly combined in the stator; the hot riveting machine in the prior art does not use a rotating positioning component to achieve the position movement and rotation angle of the stator, which is not convenient for achieving precise positioning of the stator, and the position accuracy when assembling the neutral terminal cannot be guaranteed, and the defective rate is high; the neutral terminal is not installed in the stator using a terminal installation component, and the labor cost is high; therefore, in view of this situation, it is urgent to develop a neutral terminal hot riveting machine to meet the needs of actual use. Utility Model Content

[0003] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a neutral terminal hot riveting machine, which realizes the position movement and rotation angle of the stator by adopting a rotating positioning component, realizes the precise positioning of the stator, ensures the position accuracy when assembling the neutral terminal, reduces the defective rate, and improves the assembly accuracy; by adopting the terminal installation component to install the neutral terminal into the stator, the labor cost is reduced.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A neutral terminal hot riveting machine comprises a workbench, a transfer mechanism for transferring a stator, an assembly mechanism for assembling a neutral terminal into the stator, a hot riveting mechanism for hot riveting the neutral terminal into the stator, and a detection mechanism for detecting whether the hot riveting height is qualified, wherein the transfer mechanism is arranged on the workbench; the assembly mechanism, the hot riveting mechanism and the detection mechanism are sequentially distributed along the transfer direction of the transfer mechanism; the assembly mechanism comprises a rotation positioning assembly for positioning the stator and a terminal assembly for assembling the neutral terminal into the stator, wherein the terminal assembly is located beside the rotation positioning assembly.

[0006] As a preferred solution: the rotation positioning assembly includes a vertical drive device, a longitudinal drive device and a rotation drive device, the longitudinal drive device is installed at the output end of the vertical drive device, and the rotation drive device is installed at the output end of the longitudinal drive device.

[0007] As a preferred solution: the rotary drive device includes a rotary drive motor and a rotary seat, the rotary drive motor is installed at the output end of the longitudinal drive device, the rotary seat is installed at the output end of the rotary drive motor, and the stator is located in the rotary seat.

[0008] As a preferred solution: the terminal assembly includes a transverse driving device, a vertical driving device and a material picking rod for picking up solid neutral terminals. The vertical driving device is installed at the output end of the transverse driving device, and the material picking rod is elastically and liftably installed at the output end of the vertical driving device.

[0009] As a preferred solution: the hot riveting mechanism includes a rotating material exchange component and a hot riveting component, the rotating material exchange component includes a rotating exchange device and an angle rotation device, the angle rotation device is installed at the output end of the rotating exchange device; the hot riveting component includes a lifting drive device, a wire pushing device for pushing the stator wire to prevent position interference, a pressing piece for pressing the upper surface of the stator and a hot riveting machine for hot riveting the neutral terminal into the stator, the wire pushing device, the pressing piece and the hot riveting machine are all installed at the output end of the lifting drive device, the wire pushing device corresponds to the stator, the pressing piece can be lowered to abut against the upper surface of the stator, and the hot riveting machine faces the stator.

[0010] As a preferred solution: the wire pushing device includes a wire pushing drive cylinder and a wire pushing block, the wire pushing drive cylinder is installed at the output end of the lifting drive device, and the wire pushing block is installed at the axial end of the wire pushing drive cylinder, and the wire pushing block is movable to correspond to the stator wire.

[0011] As a preferred solution: the rotary exchange device includes a rotary exchange drive motor and a rotary slide, and the rotary slide is installed at the output end of the rotary exchange drive motor; the angle rotation device includes a drive source and a discharge seat for placing the stator, and the drive source is installed on the rotary slide, and the discharge seat is installed at the output end of the drive source.

[0012] As a preferred solution: the detection mechanism includes a transfer component for transferring the stator and a height detection component for detecting the height between the upper surface of the neutral terminal and the rivet point position, and the height detection component faces the transfer component.

[0013] As a preferred solution: the transfer assembly includes a longitudinal transfer device, a rotating motor and a rotating seat, the rotating motor is installed at the output end of the longitudinal transfer device, the rotating seat is installed at the output end of the rotating motor, and the stator is located in the rotating seat.

[0014] As a preferred solution: the height detection component includes a vertical movement drive device and a height sensor, the height sensor is installed at the output end of the vertical movement drive device, and the height sensor faces the transfer component.

[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the transfer, assembly, hot riveting and detection of the stator are automatically realized by adopting a transfer mechanism, an assembly mechanism, a hot riveting mechanism and a detection mechanism, thereby improving the assembly and hot riveting efficiency; the position movement and rotation angle of the stator are realized by adopting a rotary positioning component, the precise positioning of the stator is realized, the position accuracy when assembling the neutral terminal is ensured, the defective rate is reduced, and the assembly accuracy is improved; the neutral terminal is installed in the stator by adopting a terminal installation component, thereby reducing the labor cost.

[0016] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the neutral terminal hot riveting machine of the utility model;

[0018] Figure 2 It is a three-dimensional structural diagram of the rotary positioning assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the terminal assembly of the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the hot riveting mechanism of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotary exchange material assembly of the utility model;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the hot riveting assembly of the utility model;

[0023] Figure 7 For the utility model Figure 6 Enlarged view of the M in the middle;

[0024] Figure 8 It is a three-dimensional structural diagram of the detection mechanism of the utility model.

[0025] Description of the accompanying drawings:

[0026] In the figure: 10, workbench; 20, transfer mechanism; 21, lateral drive assembly; 22, vertical drive assembly; 30, assembly mechanism; 31, rotation positioning assembly; 311, vertical drive device; 312, longitudinal drive device; 313, rotation drive motor; 314, rotation seat; 32, terminal assembly; 321, lateral drive device; 322, vertical drive device; 323, material pick-up rod; 40, hot riveting mechanism; 41, rotation exchange material assembly; 411, rotation exchange device; 4111, rotation exchange drive motor; 4112 , rotating slide; 412, angle rotation device; 4121, lateral drive cylinder; 4122, rack; 4123, gear; 4124, unloading seat; 4125, limit column; 42, hot riveting assembly; 421, lifting drive device; 422, wire pushing device; 423, pressing piece; 424, hot riveting machine; 50, detection mechanism; 51, transfer assembly; 511, longitudinal transfer device; 512, rotating motor; 513, rotating seat; 52, height detection assembly; 521, vertical movement drive device; 522, height sensor. DETAILED DESCRIPTION

[0027] The utility model Figures 1 to 8 As shown, a neutral terminal hot riveting machine includes a workbench 10, a transfer mechanism 20 for transferring a stator, an assembly mechanism 30 for assembling a neutral terminal into a stator, a hot riveting mechanism 40 for hot riveting the neutral terminal into the stator, and a detection mechanism 50 for detecting whether the hot riveting height is qualified, wherein:

[0028] The transfer mechanism 20 is arranged on the workbench 10; the assembly mechanism 30, the heat riveting mechanism 40 and the detection mechanism 50 are distributed in sequence along the transfer direction of the transfer mechanism 20; the assembly mechanism 30 includes a rotation positioning component 31 for positioning the stator and a terminal assembly 32 for assembling the neutral terminal into the stator, and the terminal assembly 32 is located beside the rotation positioning component 31.

[0029] The transfer mechanism 20 includes a transverse drive assembly 21 , a vertical drive assembly 22 and a clamping cylinder. The vertical drive assembly 22 is installed at the output end of the transverse drive assembly 21 , and the clamping cylinder is installed at the output end of the vertical drive assembly 22 .

[0030] The transfer mechanism 20 transfers the stator to the rotation positioning component 31 of the assembly mechanism 30, the rotation positioning component 31 moves the position of the stator and rotates the angle to position the stator, and the terminal assembly 32 assembles the neutral terminal on the positioned stator; the transfer mechanism 20 transfers the stator assembled with the neutral terminal to the hot riveting mechanism 40, and the hot riveting mechanism 40 hot rivets the neutral terminal into the stator; the transfer mechanism 20 transfers the stator to the detection mechanism 50, and the detection mechanism 50 detects whether the stator hot riveting height is qualified.

[0031] By adopting the transfer mechanism 20, the assembly mechanism 30, the hot riveting mechanism 40 and the detection mechanism 50, the transfer, assembly, hot riveting and detection of the stator are automatically realized, thereby improving the assembly and hot riveting efficiency; by adopting the rotation positioning component 31, the position movement and rotation angle of the stator are realized, the precise positioning of the stator is achieved, the position accuracy when assembling the neutral terminal is ensured, the defective rate is reduced, and the assembly accuracy is improved; by adopting the terminal installation component 32 to install the neutral terminal into the stator, the labor cost is reduced.

[0032] The rotation positioning assembly 31 includes a vertical driving device 311 , a longitudinal driving device 312 and a rotation driving device. The longitudinal driving device 312 is installed at the output end of the vertical driving device 311 , and the rotation driving device is installed at the output end of the longitudinal driving device 312 .

[0033] The vertical and longitudinal movements of the stator are realized by using the vertical drive device 311 and the longitudinal drive device 312, thereby meeting the stator position movement requirements; the rotation angle of the stator is realized by using the rotary drive device, thereby facilitating the precise assembly of the neutral terminal.

[0034] The rotary drive device comprises a rotary drive motor 313 and a rotary seat 314 . The rotary drive motor 313 is mounted on the output end of the longitudinal drive device 312 . The rotary seat 314 is mounted on the output end of the rotary drive motor 313 . The stator is located in the rotary seat 314 .

[0035] The rotary drive motor 313 drives the rotary seat 314 to rotate, thereby driving the stator to rotate.

[0036] The terminal assembly 32 includes a transverse driving device 321, a vertical driving device 322 and a material picking rod 323 for picking up solid neutral terminals. The vertical driving device 322 is installed at the output end of the transverse driving device 321, and the material picking rod 323 is elastically and liftably installed at the output end of the vertical driving device 322.

[0037] The transverse driving device 321 and the vertical driving device 322 drive the material picking rod 323 to move transversely and vertically respectively, so as to facilitate the installation of the neutral terminal into the stator.

[0038] The hot riveting mechanism 40 includes a rotating exchange material assembly 41 and a hot riveting assembly 42. The rotating exchange material assembly 41 includes a rotating exchange device 411 and an angle rotation device 412. The angle rotation device 412 is installed at the output end of the rotating exchange device 411; wherein:

[0039] The hot riveting assembly 42 includes a lifting drive device 421, a wire pushing device 422 for pushing the stator wire to prevent position interference, a pressing piece 423 for pressing the upper surface of the stator and a hot riveting machine 424 for hot riveting the neutral terminal into the stator. The wire pushing device 422, the pressing piece 423 and the hot riveting machine 424 are all installed at the output end of the lifting drive device 421. The wire pushing device 422 corresponds to the stator, the pressing piece 423 can be lowered to abut against the upper surface of the stator, and the hot riveting machine 424 faces the stator.

[0040] During hot riveting, the wire pushing device 422 pushes the stator wire to a certain position to prevent position interference during hot riveting; the pressing piece 423 presses the upper surface of the stator to prevent the stator position from shifting during hot riveting; the hot riveting machine 424 hot rivets the neutral terminal into the stator; the angle rotation device 412 drives the stator to rotate the angle to meet the position and angle requirements during hot riveting of the stator; the rotation exchange device 411 drives the angle rotation device 412 to rotate the position to facilitate the discharging of the stator after hot riveting.

[0041] By adopting the rotating material exchange component 41 and the hot riveting component 42, the rotating material exchange and hot riveting operations of the stator are automatically realized, the automation level is improved, and the labor cost is reduced; by adopting the wire pushing device 422, the stator wire is pushed to prevent position interference during hot riveting; by adopting the pressing piece 423, the stator is pressed to prevent the stator position from shifting during the hot riveting process, the hot riveting accuracy is improved, and the hot riveting defective rate is reduced.

[0042] The lifting drive device 421 includes a lifting drive motor, a lifting screw and a lifting slide. The lifting screw is installed on the shaft end of the lifting drive motor, and the lifting screw is rotatably matched with the lifting slide.

[0043] The wire pushing device 422 includes a wire pushing driving cylinder and a wire pushing block. The wire pushing driving cylinder is installed at the output end of the lifting driving device 421, and the wire pushing block is installed at the axial end of the wire pushing driving cylinder. The wire pushing block is movable to correspond to the stator wire.

[0044] The wire-pushing driving cylinder drives the wire-pushing block to move, thereby moving the stator wire to a different position, thereby pushing the stator wire.

[0045] The pressing member 423 is a pressing block, which is installed at the output end of the lifting drive device 421 and can be pressed and fixed on the upper surface of the stator in a descending manner.

[0046] By adopting the pressing piece 423, the stator is prevented from being misaligned, thereby reducing the defective rate.

[0047] The rotation exchange device 411 includes a rotation exchange drive motor 4111 and a rotation slide 4112 . The rotation slide 4112 is installed at the output end of the rotation exchange drive motor 4111 , and the angle rotation device 412 is installed on the rotation slide 4112 .

[0048] The angle rotation devices 412 are divided into two groups, and the two groups of angle rotation devices 412 are symmetrically distributed on the rotating slide 4112 . The rotation exchange driving motor 4111 drives the two groups of angle rotation devices 412 to rotate and exchange positions through the rotating slide 4112 .

[0049] The rotary exchange driving motor 4111 drives the rotary slide 4112 to rotate, and the rotation of the rotary slide 4112 drives the angle rotating device 412 to rotate, thereby realizing the material exchange of the two groups of angle rotating devices 412.

[0050] The angle rotating device 412 includes a driving source and a material placing seat 4124 for placing the stator. The driving source is installed on the rotating slide 4112, and the material placing seat 4124 is installed at the output end of the driving source.

[0051] The driving source includes a transverse driving cylinder 4121, a rack 4122 and a gear 4123. The transverse driving cylinder 4121 is installed on the rotating slide 4112, and the rack 4122 is installed on the shaft end of the transverse driving cylinder 4121. The rack 4122 is meshed with the gear 4123, and the gear 4123 is fastened and sleeved on the lower side of the discharge seat 4124.

[0052] The lateral driving cylinder 4121 drives the rack 4122 to move horizontally, and the lateral movement of the rack 4122 drives the gear 4123 to rotate, and the rotation of the gear 4123 drives the unloading seat 4124 and the stator to rotate, thereby meeting the stator angle rotation requirement during hot riveting.

[0053] The rotating slide 4112 is provided with a limiting column 4125 for limiting the position of the material discharging seat 4124. The material discharging seat 4124 is rotatably abutted against the limiting column 4125, and the front end of the limiting column 4125 is elastic.

[0054] The position accuracy of the material discharging seat 4124 after rotation is improved by adopting the limiting column 4125.

[0055] The detection mechanism 50 includes a transfer component 51 for transferring the stator and a height detection component 52 for detecting the height between the upper surface of the neutral terminal and the rivet point position, and the height detection component 52 faces the transfer component 51 .

[0056] The transfer assembly 51 includes a longitudinal transfer device 511 , a rotating motor 512 and a rotating seat 513 . The rotating motor 512 is installed at the output end of the longitudinal transfer device 511 . The rotating seat 513 is installed at the output end of the rotating motor 512 . The stator is located in the rotating seat 513 .

[0057] The height detection assembly 52 includes a vertical movement driving device 521 and a height sensor 522 . The height sensor 522 is installed at the output end of the vertical movement driving device 521 , and the height sensor 522 faces the transfer assembly 51 .

[0058] The transverse drive assembly 21, the vertical drive assembly 22, the vertical drive device 311, the longitudinal drive device 312, the transverse drive device 321, the vertical drive device 322, the longitudinal transfer device 511, and the vertical movement drive device 521 all use a drive motor, a screw rod and a sliding seat, and the screw rod is installed on the shaft end of the drive motor, and the screw rod rotates with the sliding seat; a drive cylinder and a slider can also be used, and the slider is installed on the shaft end of the drive cylinder.

[0059] The stator is located on the transfer assembly 51, and the transfer assembly 51 drives the stator to move its position and rotation angle, so that the stator is located below the height sensor 522. The vertical movement drive device 521 drives the height sensor 522 to move vertically. The height sensor 522 adopts a GT sensor. The height sensor 522 detects the height between the upper surface of the neutral terminal and the rivet point position, so as to determine whether the hot riveting is qualified.

[0060] The usage and principle of the neutral terminal hot riveting machine are as follows:

[0061] The transfer mechanism transfers the stator to the rotation positioning component of the assembly mechanism, the rotation positioning component moves the position of the stator and rotates the angle to position the stator, and the terminal assembly assembles the neutral terminal on the positioned stator; the transfer mechanism transfers the stator assembled with the neutral terminal to the hot riveting mechanism, and the hot riveting mechanism hot rivets the neutral terminal into the stator; the transfer mechanism transfers the stator to the detection mechanism, and the detection mechanism detects whether the stator hot riveting height is qualified.

[0062] The design focus of the utility model is that the transfer, assembly, hot riveting and detection of the stator are automatically realized by adopting a transfer mechanism, an assembly mechanism, a hot riveting mechanism and a detection mechanism, thereby improving the assembly and hot riveting efficiency; the position movement and rotation angle of the stator are realized by adopting a rotary positioning component, and the precise positioning of the stator is realized, the position accuracy when assembling the neutral terminal is ensured, the defective rate is reduced, and the assembly accuracy is improved; the neutral terminal is installed in the stator by adopting a terminal installation component, thereby reducing the labor cost.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A neutral terminal hot riveting machine, characterized in that: The invention comprises a workbench, a transfer mechanism for transferring a stator, an assembly mechanism for assembling a neutral terminal into the stator, a hot riveting mechanism for hot riveting the neutral terminal into the stator, and a detection mechanism for detecting whether the hot riveting height is qualified. The transfer mechanism is arranged on the workbench; the assembly mechanism, the hot riveting mechanism and the detection mechanism are sequentially distributed along the transfer direction of the transfer mechanism; the assembly mechanism comprises a rotation positioning component for positioning the stator and a terminal assembly for assembling the neutral terminal into the stator, and the terminal assembly is located beside the rotation positioning component.

2. The neutral terminal hot riveting machine according to claim 1, characterized in that: The rotation positioning assembly comprises a vertical drive device, a longitudinal drive device and a rotation drive device. The longitudinal drive device is installed at the output end of the vertical drive device, and the rotation drive device is installed at the output end of the longitudinal drive device.

3. The neutral terminal hot riveting machine according to claim 2, characterized in that: The rotary drive device comprises a rotary drive motor and a rotary seat. The rotary drive motor is installed at the output end of the longitudinal drive device, the rotary seat is installed at the output end of the rotary drive motor, and the stator is located in the rotary seat.

4. The neutral terminal hot riveting machine according to claim 1, characterized in that: The terminal assembly includes a transverse driving device, a vertical driving device and a material picking rod for picking up solid neutral terminals. The vertical driving device is installed at the output end of the transverse driving device, and the material picking rod is elastically and liftably installed at the output end of the vertical driving device.

5. The neutral terminal hot riveting machine according to claim 1, characterized in that: The hot riveting mechanism includes a rotating material exchange component and a hot riveting component. The rotating material exchange component includes a rotating exchange device and an angle rotation device. The angle rotation device is installed at the output end of the rotating exchange device. The hot riveting component includes a lifting drive device, a wire pushing device for pushing the stator wire to prevent position interference, a pressing piece for pressing the upper surface of the stator, and a hot riveting machine for hot riveting the neutral terminal into the stator. The wire pushing device, the pressing piece and the hot riveting machine are all installed at the output end of the lifting drive device. The wire pushing device corresponds to the stator, the pressing piece can be lowered to abut against the upper surface of the stator, and the hot riveting machine faces the stator.

6. The neutral terminal hot riveting machine according to claim 5, characterized in that: The wire pushing device comprises a wire pushing driving cylinder and a wire pushing block. The wire pushing driving cylinder is installed at the output end of the lifting driving device, and the wire pushing block is installed at the shaft end of the wire pushing driving cylinder. The wire pushing block is movable to correspond to the stator wire.

7. The neutral terminal hot riveting machine according to claim 5, characterized in that: The rotary exchange device comprises a rotary exchange drive motor and a rotary slide, and the rotary slide is installed at the output end of the rotary exchange drive motor; the angle rotation device comprises a drive source and a discharge seat for placing the stator, and the drive source is installed on the rotary slide, and the discharge seat is installed at the output end of the drive source.

8. The neutral terminal hot riveting machine according to claim 1, characterized in that: The detection mechanism comprises a transfer component for transferring the stator and a height detection component for detecting the height between the upper surface of the neutral terminal and the rivet point position, and the height detection component faces the transfer component.

9. The neutral terminal hot riveting machine according to claim 8, characterized in that: The transfer assembly comprises a longitudinal transfer device, a rotating motor and a rotating seat. The rotating motor is installed at the output end of the longitudinal transfer device, the rotating seat is installed at the output end of the rotating motor, and the stator is located in the rotating seat.

10. The neutral terminal hot riveting machine according to claim 8, characterized in that: The height detection component includes a vertical movement drive device and a height sensor. The height sensor is installed at the output end of the vertical movement drive device and faces the transfer component.