Electric cylinder
By installing the motor outside the electric cylinder housing and using a wire fixing structure to achieve flexible installation and replacement of the motor, the problems of poor heat dissipation and insufficient adaptability of the motor are solved, and the heat dissipation effect and convenience of the motor are improved.
Patent Information
- Application Number
- CN202421255694.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-04
AI Technical Summary
Among the existing electric cylinders, the motor is built into the shell, which makes the heat dissipation poorly easily damaged, and the adaptability between the motor and the shell of different models is poor.
Flexible installation and replacement of the motor is achieved by installing the motor outside the housing and tightening the motor clamp on the cover using a wire fixing structure. Both ends of the wire are fixed to the cover by connecting parts to ensure stable installation of the motor and adapt to different models of motors by adjusting the length of the wire.
It improves the heat dissipation effect and convenience of replacement of the motor, while enhancing the adaptability between different models of motors and shells.
Smart Images
Figure CN222654962U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder. Background Art
[0002] The electric cylinder is a product that integrates a servo motor and a lead screw, converting the rotational motion of the motor into the linear motion of the output rod.
[0003] The text of the Chinese patent application with application number 202110831784.2 discloses an 8-pole rotor-driven electric cylinder with high operating stability, including a shell, a cover is fixedly installed on one end of the shell, a limit plate is fixedly installed in the shell, a servo motor is jointly installed between the limit plate and the cover, a reciprocating screw is rotatably installed on the limit plate, one end of the reciprocating screw passes through the limit plate and is engaged with the output end of the servo motor, a telescopic tube is threadedly sleeved on the end of the reciprocating screw away from the servo motor, a limit cylinder is fixedly installed on the inner wall of the shell away from the cover, and the end of the telescopic tube away from the servo motor passes through the limit cylinder and extends to the outside of the shell.
[0004] This solution installs the servo motor by engaging the limit plate and the cover together. The motor is installed inside the housing, which has poor heat dissipation and is prone to damage. At the same time, when the motor is damaged and needs to be replaced, the motors must be of the same model or thickness due to the fixed engagement spacing between the limit plate and the cover, resulting in poor adaptability. Utility Model Content
[0005] The utility model aims at the shortcomings of the prior art that the motor is built in the shell, the heat dissipation is poor and the motor is easily damaged, and the adaptability between the motors of different models and the shells is poor, and provides an electric cylinder that can be installed with multiple motors of different models.
[0006] In order to solve the above technical problems, the utility model is solved by the following technical solutions:
[0007] An electric cylinder comprises an outer shell and a cover fixed at one end of the outer shell, a lead screw and an output rod which cooperates with the lead screw and moves linearly and reciprocatingly along the axial direction of the lead screw as the lead screw rotates, the rotation of the lead screw is controlled by a motor, and the motor is fixed to an end of the cover away from the outer shell through a fixing structure, the fixing structure comprises a metal wire, and a first connecting part and a second connecting part which clamp the motor on the cover are provided between the two ends of the metal wire and the cover.
[0008] With the above solution, the motor is installed outside the housing through a fixed structure, which is convenient for the heat dissipation of the motor and increases the convenience of replacing the motor. When replacing the motor, the fixed connection between the two ends of the metal wire and the cover can be released, and the metal wire can be tightened on the motor to remove the motor from the cover; conversely, when installing the motor, the length of the metal wire can be adjusted in real time according to the size of the motor to be installed, and when the two ends of the metal wire are fixedly connected to the cover, the motor can be tightened on the cover, thereby improving the compatibility between motors of different models and housings.
[0009] Preferably, the portion of the metal wire clamped on the motor is in a "snake-shaped" shape.
[0010] By adopting the above solution, the contact area between the metal wire and the motor is increased, that is, the force-bearing area is increased, and the tightening and limiting strength of the metal wire on the motor is further improved.
[0011] Preferably, the first connecting portion includes a through hole provided on the cover for only the metal wire to pass through, and a limit head bent on one end of the metal wire passing through the through hole to limit the metal wire from escaping from the through hole and abutting against a side of the cover away from the motor.
[0012] By adopting the above scheme, the metal wire is bent and deformed to match the motor, and the two ends of the metal wire are tightened so that the metal wire tightly clamps the motor on the cover. After one end of the metal wire passes through the through hole, the part of the metal wire passing through the through hole is trimmed, the length of the metal wire at this end is adjusted, and force is applied to bend the end part passing through the through hole to form a limit head that abuts against the side of the cover away from the motor. Since the through hole is only for the metal wire to pass through, the limit head cannot pass through the through hole, so the metal wire will not fall out of the through hole, and the limit head abuts against the side of the cover away from the motor to ensure that the metal wire remains in a state of tightly clamping the motor.
[0013] Preferably, the second connecting part includes an internal threaded sleeve arranged on the side of the cover away from the outer shell, a bolt threadedly matched with the internal threaded sleeve, and a clamping head bent on the end of the metal wire away from the limit head and capable of being clamped and limited by the bolt and the internal threaded sleeve.
[0014] By adopting the above scheme, the two ends of the metal wire are tightened so that the metal wire clamps the motor on the cover, the end of the metal wire away from the limit head is trimmed, the length of the metal wire at this end is adjusted, and force is applied to bend the end to form a clamping head, and the bolt that cooperates with the thread of the internal threaded sleeve is rotated so that the clamping head is clamped and limited by the bolt and the internal threaded sleeve to prevent it from coming out, thereby ensuring that the metal wire remains in a state of tightly clamping the motor.
[0015] Preferably, the clamping head is in an arc shape concentric with the internal thread sleeve.
[0016] By adopting the above solution, the force contact area between the clamping head, the internal thread sleeve and the bolt is increased, and the clamping strength and stability of the clamping head on the internal thread sleeve and the bolt are improved.
[0017] Preferably, a limit structure for controlling the moving position of the output rod is provided between the housing and the output rod, the limit structure comprising two micro switches spaced apart in the housing along the extension and retraction direction of the output rod, a contact block fixed on the output rod that can touch the two micro switches, and a control structure provided between the motor and the micro switch for controlling the motor to stop rotating when the contact block touches the micro switch.
[0018] With the above solution, the motor drives the lead screw to rotate, and drives the output rod to reciprocate and extend along the axial direction of the lead screw. When the output rod moves to the point where the contact block touches the micro switch far away from the motor, the control structure controls the motor to stop rotating, and limits the output rod from continuing to extend. Conversely, when the output rod moves to the point where the contact block touches the micro switch close to the motor, the control structure controls the motor to stop rotating, and limits the output rod from continuing to retract. The contact block touches the two micro switches respectively to limit the movement range of the output rod.
[0019] Preferably, the control structure includes an integrated board arranged in the housing, a control module arranged on the integrated board and connected to the signals of the two micro switches, an interface arranged on the outer wall of the motor and connected to the motor signals and opening toward the cover, and a plug arranged on the integrated board and connected to the control module signals and capable of passing through the cover and plugging into the interface signal.
[0020] By adopting the above scheme, when the motor is assembled on the cover, the interface and the plug are connected by signal after being plugged in, so that the motor, the control module and the two micro switches are electrically connected by signal. When the micro switch is touched, the signal is transmitted to the control module, and the control module controls the motor to stop rotating.
[0021] Preferably, the cover is provided with a first avoidance slot through which the output shaft of the power supply motor passes and is connected to the screw rod, and a second avoidance slot through which the plug passes and is connected to the interface.
[0022] The utility model has significant technical effects due to the adoption of the above technical solution: the motor is installed outside the housing, which is convenient for the heat dissipation of the motor and increases the convenience of replacing the motor. When replacing the motor, the fixed connection between the two ends of the metal wire and the cover can be released, and the tight clamping limit of the metal wire on the motor can be released, and the motor can be removed from the cover; conversely, when installing the motor, the length of the metal wire is adjusted in real time according to the size of the motor to be installed, and when the two ends of the metal wire are fixedly connected to the cover, the motor can be clamped on the cover, thereby improving the adaptability between different motors and housings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is an axonometric diagram of an electric cylinder in an embodiment;
[0024] Figure 2 yes Figure 1 A in the enlarged view;
[0025] Figure 3 is an axonometric diagram of an electric cylinder in an embodiment;
[0026] Figure 4 yes Figure 3 The enlarged view of point B in the figure;
[0027] Figure 5 is a disassembled diagram of an electric cylinder in the embodiment;
[0028] Figure 6 yes Figure 5 The enlarged view of point C in the figure;
[0029] Figure 7 is a disassembled diagram of an electric cylinder in the embodiment;
[0030] Figure 8 yes Figure 7 The enlarged view of point D in the figure;
[0031] Fig. 9 is a disassembled diagram of an electric cylinder in the embodiment;
[0032] Fig.10 yes Fig. 9 Enlarged view of point E in FIG.
[0033] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. housing; 2. cover; 3. screw rod; 4. output rod; 5. motor; 6. metal wire; 7. through hole; 8. limit head; 9. internal thread sleeve; 10. bolt; 11. clamping head; 12. micro switch; 13. contact block; 14. integrated board; 15. interface; 16. plug; 17. first avoidance slot; 18. second avoidance slot. DETAILED DESCRIPTION
[0034] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0035] Example
[0036] An electric cylinder, referring to Figures 1 to 10, comprising a housing 1, a cover 2 is fixedly connected to one end of the housing 1, and a motor 5 is fixed to the side of the cover 2 away from the housing 1 through a fixing structure. A first avoidance slot 17 is provided on the cover 2, and the end of the output shaft of the motor 5 away from the motor 5 passes through the first avoidance slot 17 and is located inside the housing 1. A screw 3 is coaxially connected to the output shaft of the motor 5 in the housing 1, that is, the motor 5 drives the screw 3 to rotate, and an output rod 4 is coaxially provided on the screw 3, which cooperates with the screw 3 and moves linearly and reciprocatingly along the axial direction of the screw 3 as the screw 3 rotates. The connection method between the output shaft of the motor 5 and the screw 3, the matching method between the screw 3 and the output rod 4, and the control method for controlling the linear movement of the output rod 4 when the screw 3 rotates are all prior art, which are not shown in the figure and will not be described here.
[0037] The fixing structure includes a metal wire 6, and a first connecting portion and a second connecting portion are provided between the two ends of the metal wire 6 and the cover 2. When the metal wire 6 is fixedly connected to the cover 2 through the first connecting portion and the second connecting portion, the motor 5 can be clamped on the cover 2. In this embodiment, the metal wire 6 is made of steel wire. The part of the metal wire 6 clamped on the motor 5 is in a "snake shape", which increases the contact area between the metal wire 6 and the motor 5 and improves the clamping and limiting strength of the metal wire 6 on the motor 5.
[0038] The first connection part includes a through hole 7 provided on the cover 2, and the through hole 7 is only for the metal wire 6 to pass through. One end of the metal wire 6 passing through the through hole 7 is bent to form a limit head 8, and the limit head 8 abuts against the side of the cover 2 away from the motor 5, and the limit head 8 can limit the metal wire 6 from being separated from the through hole 7. The second connection part includes an internal thread sleeve 9 provided on the side of the cover 2 away from the housing 1, and the bolt 10 is threadedly matched with the internal thread sleeve 9. One end of the metal wire 6 away from the limit head 8 is bent to form a clamping head 11, and the clamping head 11 can be clamped and limited by the bolt 10 and the internal thread sleeve 9. The clamping head 11 is in an arc shape concentric with the internal thread sleeve 9.
[0039] The metal wire 6 is bent and deformed to fit the motor 5, and the two ends of the metal wire 6 are tightened so that the metal wire 6 clamps the motor 5 on the cover 2. After one end of the metal wire 6 passes through the through hole 7, the part of the metal wire 6 passing through the through hole 7 is trimmed, and the length of the metal wire 6 at this end is adjusted. The end passing through the through hole 7 is bent by force to form a limit head 8 that abuts against the side of the cover 2 away from the motor 5, and the metal wire 6 is kept in a taut state. Since the through hole 7 is only for the metal wire 6 to pass through, the metal wire 6 formed after bending has a clamping force. The limiting head 8 at the corner cannot pass through the through hole 7, so the metal wire 6 will not fall out of the through hole 7; the end of the metal wire 6 away from the limiting head 8 is trimmed, the length of the metal wire 6 at this end is adjusted, and force is applied to bend the end to form a clamping head 11, and the bolt 10 passes through the clamping head 11 and is threadedly matched with the internal threaded sleeve 9. By rotating the bolt 10 that is threadedly matched with the internal threaded sleeve 9, the clamping head 11 is clamped and limited by the bolt 10 and the internal threaded sleeve 9 to avoid falling out, thereby ensuring that the metal wire 6 remains in a state of tightly clamping the motor 5.
[0040] A limit structure for controlling the moving position of the output rod 4 is provided between the housing 1 and the output rod 4. The limit structure includes two micro switches 12 arranged at intervals in the housing 1 along the extension direction of the output rod 4. A contact block 13 is fixed on the output rod 4. The contact block 13 can touch the two micro switches 12 during the movement of the output rod 4. A control structure for controlling the motor 5 to stop rotating when the contact block 13 touches the micro switch 12 is provided between the motor 5 and the micro switch 12. The contact block 13 touches the two micro switches 12 respectively to limit the moving range of the output rod 4.
[0041] The control structure includes an integrated board 14 fixedly arranged in the housing 1, a control module connected to the signals of the two micro switches 12 is arranged on the integrated board 14, an interface 15 connected to the signals of the motor 5 and opening toward the cover 2 is arranged on the outer wall of the motor 5, a plug 16 connected to the signals of the control module is arranged on the integrated board 14, the plug 16 can pass through the cover 2 and be plugged into the interface 15, and a second avoidance slot 18 for the plug 16 to pass through is arranged on the cover 2. When the motor 5 is assembled on the cover 2, the interface 15 and the plug 16 are connected by signal after being plugged, so that the motor 5, the control module and the two micro switches 12 are electrically connected by signal, and the micro switch 12 transmits the signal to the control module after being touched, and the control module controls the motor 5 to stop rotating. The control module and the connection and control method between the control module and the motor 5 and the micro switch 12 are all prior art and will not be described in detail here.
[0042] When installing the motor 5, the output shaft of the motor 5 passes through the first avoidance groove 17, and the plug 16 and the interface 15 are plugged in to realize signal electrical connection, the metal wire 6 is bent and deformed to adapt to the motor 5, and the two ends of the metal wire 6 are tightened so that the metal wire 6 tightly clamps the motor 5 on the cover 2, and one end of the metal wire 6 passing through the through hole 7 is trimmed and bent to form a limit head 8, and the other end of the metal wire 6 is trimmed and bent to form a clamping head 11, and the bolt 10 passes through the clamping head 11 and is threadedly matched with the internal threaded sleeve 9, and by rotating the bolt 10, the clamping head 11 is clamped and limited by the bolt 10 and the internal threaded sleeve 9 to prevent it from coming out, ensuring that the metal wire 6 remains in a state of tightly clamping the motor 5, and completing the installation of the motor 5.
[0043] During disassembly, the bolt 10 is unscrewed from the internal threaded sleeve 9 to release the clamping limit of the clamping head 11; then the limit head 8 is deformed to be coaxial with the metal wire 6, so that it can be detached from the through hole 7, and the disassembly of the metal wire 6 is completed, and the motor 5 can be removed.
[0044] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.
Claims
1. An electric cylinder, comprising a housing (1) and a cover (2) fixed to one end of the housing (1), a screw (3) and an output rod (4) which cooperates with the screw (3) and moves linearly and reciprocatingly along the axial direction of the screw (3) as the screw (3) rotates, and the rotation of the screw (3) is controlled by a motor (5), characterized in that: The motor (5) is fixed to an end of the cover (2) away from the housing (1) via a fixing structure, the fixing structure comprising a metal wire (6), and a first connecting portion and a second connecting portion for clamping the motor (5) onto the cover (2) are provided between the two ends of the metal wire (6) and the cover (2).
2. The electric cylinder according to claim 1, characterized in that: The portion of the metal wire (6) that is tightly clamped on the motor (5) is in a "snake" shape.
3. The electric cylinder according to claim 1, characterized in that: The first connecting portion comprises a through hole (7) provided on the cover (2) and only for the metal wire (6) to pass through, and a limiting head (8) formed by bending at one end of the metal wire (6) passing through the through hole (7) to limit the metal wire (6) from escaping from the through hole (7) and abutting against a side of the cover (2) away from the motor (5).
4. The electric cylinder according to claim 3, characterized in that: The second connecting portion comprises an internal thread sleeve (9) arranged on a side of the sealing cover (2) away from the housing (1), a bolt (10) threadably matched with the internal thread sleeve (9), and a clamping head (11) bent on an end of the metal wire (6) away from the limiting head (8) and capable of being clamped and limited by the bolt (10) and the internal thread sleeve (9).
5. The electric cylinder according to claim 4, characterized in that: The clamping head (11) is in an arc shape which is concentric with the internal thread sleeve (9).
6. The electric cylinder according to claim 1, characterized in that: A limiting structure for controlling the moving position of the output rod (4) is arranged between the housing (1) and the output rod (4), the limiting structure comprising two micro switches (12) arranged at intervals in the housing (1) along the extension and retraction direction of the output rod (4), a contact block (13) fixed on the output rod (4) and capable of contacting the two micro switches (12), and a control structure arranged between the motor (5) and the micro switch (12) and controlling the motor (5) to stop rotating when the contact block (13) contacts the micro switch (12).
7. The electric cylinder according to claim 6, characterized in that: The control structure comprises an integrated board (14) arranged in the housing (1), a control module arranged on the integrated board (14) and connected to the signals of the two micro switches (12), an interface (15) arranged on the outer wall of the motor (5) and connected to the signals of the motor (5) and opening toward the cover (2), and a plug (16) arranged on the integrated board (14) and connected to the signals of the control module and capable of passing through the cover (2) and being plugged into the interface (15) for signals.
8. The electric cylinder according to claim 7, characterized in that: The cover (2) is provided with a first escape slot (17) through which the output shaft of the power supply machine (5) passes and is connected to the screw rod (3), and a second escape slot (18) through which the plug (16) passes and is connected to the interface (15).
Citation Information
Patent Citations
Eight-pole rotor driving type electric cylinder with high operation stability
CN115694054A