Push rod actuator with static retention force

Abstract

The utility model provides a push rod actuator with static retention force, which comprises a first shell and a second shell, and openings of the first shell and the second shell are oppositely connected. The bottom face of the second shell is slidably connected with a rack, the rack is in driving connection with a driving motor, the driving motor is clamped between the first shell and the second shell, and the driving motor drives the rack to move in a reciprocating mode. The rack is provided with a locking mechanism, the locking mechanism is connected with the first shell, and the locking mechanism locks the rack. The locking mechanism comprises a thrust device and a locking block, the thrust device is in driving connection with the locking block, and the thrust device drives the locking block to move so that the locking block can be connected with the rack in a clamped mode. According to the utility model, the door body can be prevented from being automatically closed under the influence of self weight and the hinge spring, personnel are prevented from being pinched, the safety is improved, a space is provided for a user to open the door body, and the operation convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of actuator, specifically relates to a push rod actuator with static holding force. BACKGROUND

[0002] With high -end home appliance is towards intelligent, integration direction development, in various high -end intelligent household appliance application, widely uses automatic switch door actuator, door handle is gradually eliminated. Push rod actuator is one of common solution, push rod actuator pushes open door body, makes door body be in set position, and keeps a few seconds, facilitates user to open door body. The existing push rod actuator usually relies on the self -locking force of the reduction motor, overcomes the very big door -closing force of the door body weight and hinge internal spring, makes the door body keep in situ. However, when the actuator is powered off, the self -locking force of the reduction motor cannot overcome the door -closing force of the door body weight and spring, the door body will automatically close, there is the risk of being pinched, causes the hindrance for user operation, affects the safety and convenience of use.

[0003] Therefore, the above problems need to be solved. INVENTION CONTENT

[0004] The utility model discloses a push rod actuator with static holding force, which can provide sufficient static holding force to overcome the door body weight and the door closing force generated by the spring, reduce the risk of being pinched by the user, and improve the convenience of operation.

[0005] Technical scheme: In order to realize the above object, the utility model provides a push rod actuator with static holding force, which comprises a first shell and a second shell, and the first shell and the second shell are connected in opening opposition. The second shell bottom surface is slidably connected with a rack, the rack is drivingly connected with a driving motor, the driving motor is clamped between the first shell and the second shell, and the driving motor drives the rack to reciprocate. The rack is provided with a locking mechanism, the locking mechanism is connected with the first shell, and the locking mechanism locks the rack. The locking mechanism comprises a thrust device and a locking block, and the thrust device and the locking block are drivingly connected. The thrust device drives the locking block to move, so that the locking block and the rack are clamped. During use, the driving motor drives the rack to extend out of the opening provided in the first shell and the second shell, the rack pushes the door body to open, then the thrust device pushes the locking block to move, so that the locking block and the rack are clamped, the locking block locks the rack, thereby avoiding the door body from being automatically closed due to the influence of the weight and the hinge spring, avoiding the risk of being pinched, improving the safety, providing space for the user to open the door body, and improving the convenience of operation.

[0006] Further, the push rod actuator with static holding force described above, the locking block is set as a triangular wedge, the long side of the locking block is arranged close to the rack, and the long side of the locking block is provided with a corresponding tooth part of the rack. The short side of the locking block away from the thrust device is provided with a through groove, the through groove is arranged obliquely along the short side, the locking block is connected to the first housing through an axle away from the through groove, a driving shaft is arranged in the through groove, the driving shaft is drivingly connected to the thrust device, and the thrust device pushes the driving shaft to move along the through groove. The thrust device pulls the driving shaft to move towards the thrust device, the driving shaft moves along the through groove to the highest point of the locking block, the locking block moves downward away from the corner of the thrust device, the locking block is provided with a tooth part and a rack, and the tooth part and the rack are pressed together, thereby limiting the movement of the rack and locking the rack. By locking the rack through the triangular locking block, the thrust device and the locking block can be arranged parallel to the rack, the height of the push rod actuator can be reduced, and the space utilization rate can be improved.

[0007] Further, the push rod actuator with static holding force described above, the thrust device includes an electromagnet, and the electromagnet is set as a de-energized self-holding electromagnet. The electromagnet is slidingly connected with an armature, the armature is sleeved with a spring, and the armature is connected with the driving shaft. The driving shaft is slidingly connected in the waist hole of the first housing, and the long axis of the waist hole is arranged horizontally. When the electromagnet loses power, the electromagnet drives the armature to move towards the electromagnet, the armature drives the driving shaft to move towards the electromagnet, the driving shaft drives the locking block away from the electromagnet to move downward, the locking block engages with the rack, and the armature presses the spring. When the electromagnet is powered on, the spring returns to its original position, and the spring pushes the armature to move away from the electromagnet, the armature lifts the locking block away from the electromagnet, separates the locking block and the rack, and the rack can move. The above design ensures that when the thrust actuator loses power, the locking block locks the rack, avoids the actuator losing power, causes the motor to lack self-locking force, ensures that the door body position is at the original position, avoids the door body from being automatically closed, improves the operation convenience and safety.

[0008] Further, the push rod actuator with static holding force described above, the rack is provided with a notch, the notch is provided on the side of the rack close to the driving motor, the notch includes an opening direction notch and a closing direction notch. Two opening direction notches are provided, and the opening direction notches are provided on the end of the rack close to the thrust device. The closing direction notch is provided on the end of the rack away from the thrust device. The second shell is connected to a limit switch, and the limit switch is provided with two, and the limit switch is provided on both sides of the driving motor, and the two limit switches and the two opening direction notches are correspondingly arranged. When the rack is extended to push the door body open, the two limit switches are embedded in the opening direction notch, at this time, the door body is opened to the position, the two limit switches are simultaneously turned off, the control system receives the off signal of the two limit switches, and the control system controls the driving motor to stop rotating. When the rack is retracted between the first shell and the second shell, the limit switch provided on the side of the driving motor away from the thrust device is turned off, and the limit switch on the other side is turned on, the control system receives the on signal and the off signal of the limit switch, and the control system controls the driving motor to stop rotating, so that the automatic control of the push rod actuator is realized, and the automation of the push rod actuator is improved.

[0009] Further, the push rod actuator with static holding force described above, the driving motor and the rack are cross-shaped, the driving motor is drivingly connected with a gear shaft, the gear shaft is rotatably connected between the first shell and the second shell, and the end of the gear shaft away from the driving motor is engaged with the rack. The driving motor drives the rack to move through the gear shaft, and converts the rotary motion of the motor into the linear motion of the rack, so that the structure is simple, the maintenance is convenient, the moving speed and direction of the rack can be accurately controlled by controlling the rotating speed and direction of the motor, and the control precision of the push rod actuator is improved.

[0010] Further, the push rod actuator with static holding force described above, the rack is provided with double rows of teeth. The double rows of teeth can improve the carrying capacity and mechanical strength of the rack, meet the needs of opening and closing the door body, and can reduce wear and improve the service life of the actuator.

[0011] Further, the push rod actuator with static holding force described above, the end of the rack away from the locking mechanism is provided with a flexible block. When the rack pushes the door body, the flexible block first contacts the door body, so that the rigid contact between the rack and the door body becomes flexible contact, the opening noise is reduced, the wear is reduced, and the service life is improved.

[0012] Further, the push rod actuator with static holding force described above, the gear shaft includes a connecting portion, a first limiting portion, a second limiting portion and an engaging portion, the connecting portion, the first limiting portion, the second limiting portion and the engaging portion are coaxially and integrally connected in sequence, the connecting portion is drivingly connected with the motor shaft of the driving motor, the first limiting portion and the second limiting portion are clamped on both sides of the protrusions provided on the second shell, the engaging portion is provided with teeth along the side wall, and the engaging portion is engaged with the rack. The above structure can improve the stability of the gear shaft, reduce the axial movement of the gear shaft, and improve the stability of the actuator.

[0013] Further, the push rod actuator with static holding force has the second shell provided with a locking lug arranged along the bottom of the second shell.

[0014] The push rod actuator with static holding force can avoid the door body from being automatically closed due to the dead weight and the hinge spring, avoid the personnel from being pinched, improve the safety, provide the space for the user to open the door body, and improve the convenience of operation. The push rod actuator with static holding force can avoid the door body from being automatically closed due to the dead weight and the hinge spring, avoid the personnel from being pinched, improve the safety, provide the space for the user to open the door body, and improve the convenience of operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the push rod actuator with static holding force;

[0016] Figure 2 It is an internal schematic view of the push rod actuator with static holding force;

[0017] Figure 3 It is a structural schematic view of the push device;

[0018] Figure 4 It is an internal front view of the push rod actuator with static holding force;

[0019] Figure 5 It is a front view of the gear shaft.

[0020] In the drawing: 1, first shell, 2, second shell, 21, rack, 211, notch, 2111, opening direction notch, 2112, closing direction notch, 22, driving motor, 23, locking mechanism, 231, push device, 2311, electromagnet, 2312, armature, 2313, spring, 232, locking block, 2321, through groove, 2322, driving shaft, 24, limit switch, 25, gear shaft, 251, connecting part, 252, first limiting part, 253, second limiting part, 254, meshing part, 26, flexible block, 27, locking lug. DETAILED DESCRIPTION

[0021] Example 1

[0022] As Figures 1-2A push rod actuator with a static holding force is shown, comprising a first housing 1 and a second housing 2, the first housing 1 and the second housing 2 being connected with each other through openings. A rack 21 is slidably connected to the bottom surface of the second housing 2. The rack 21 is driven by a drive motor 22, which is engaged between the first housing 1 and the second housing 2 and drives the rack 21 to reciprocate. The rack 21 is provided with a locking mechanism 23, which is connected to the first housing 1 and locks the rack 21. The locking mechanism 23 includes a thrust device 231 and a locking block 232, which are driven by the thrust device 231 and the locking block 232. The thrust device 231 drives the locking block 232 to move, causing the locking block 232 to engage with the rack 21. The drive motor 22 and the rack 21 are arranged in a cross pattern. The drive motor 22 is driven by a gear shaft 25, which is rotatably connected between the first housing 1 and the second housing 2. The end of the gear shaft 25 away from the drive motor 22 meshes with the rack 21. The rack 21 is provided with a double row of teeth. A flexible block 26 is provided at one end of the rack 21 away from the locking mechanism 23. The second housing 2 is provided with a locking lug 27, which is provided along the bottom of the second housing 2.

[0023] During use, the driving motor 22 drives the rack 21 to extend out of the openings provided in the first shell 1 and the second shell 2, the rack 21 pushes the door body to open, and then the thrust device 231 pushes the locking block 232 to move, so that the locking block 232 and the rack 21 are engaged, and the locking block 232 locks the rack 21.

[0024] like Figure 3 In the illustrated push rod actuator with static holding force, the locking block 232 is configured as a triangular wedge. The long side of the locking block 232 is positioned adjacent to the rack 21, and the long side of the locking block 232 is provided with teeth corresponding to the rack 21. A through-slot 2321 is provided on the short side of the locking block 232, away from the thrust mechanism 231. The through-slot 2321 is arranged obliquely along the short side. The locking block 232 is axially connected to the first housing 1 at an angle away from the through-slot 2321. A drive shaft 2322 extends through the through-slot 2321, drivingly connected to the thrust mechanism 231. The thrust mechanism 231 propels the drive shaft 2322 along the through-slot 2321. The thrust device 231 pulls the drive shaft 2322 toward the thrust device 231. The drive shaft 2322 moves along the through slot 2321 toward the highest point of the locking block 232. The locking block 232 moves downward away from a corner of the thrust device 231. The teeth of the locking block 232 press against the rack 21, thereby restricting the movement of the rack 21 and locking the rack 21. The thrust device 231 includes an electromagnet 2311, which is configured as a power-off self-holding electromagnet. The electromagnet 2311 is slidably connected to an armature 2312, which is sleeved with a spring 2313. The armature 2312 is connected to the drive shaft 2322. The drive shaft 2322 is slidably connected to the waist hole provided in the first housing 1, and the long axis of the waist hole is horizontally arranged.

[0025] When the electromagnet 2311 loses power and becomes magnetized, the electromagnet 2311 drives the armature 2312 toward the electromagnet 2311. The armature 2312 drives the drive shaft 2322 toward the electromagnet 2311, driving the locking block 232 away from the electromagnet 2311 to move downward. The locking block 232 engages the rack, and the armature 2312 compresses the spring 2313. When the electromagnet 2311 is powered on and demagnetized, the spring 2313 pushes the armature 2312 away from the electromagnet 2311. The spring 2313 returns to its original position, and the armature 2312 lifts the locking block 232 away from the electromagnet 2311, separating and unlocking the locking block 232 and the rack 21, allowing the rack 21 to move.

[0026] like Figure 4 The push rod actuator with static holding force shown in FIG. has a rack 21 with a slot 211 located on the side of the rack 21 near the drive motor 22. The slots 211 include an opening slot 2111 and a closing slot 2112. Two opening slots 2111 are provided: one located on the end of the rack 21 near the thrust device 231. The other located on the end of the rack 21 away from the thrust device 231. The second housing 2 is connected to two limit switches 24, one located on either side of the drive motor 22, corresponding to the two opening slots 2111. When the rack 21 extends to push the door open, both limit switches 24 engage within the opening slots 21111. At this point, the door is fully opened, and both limit switches 24 simultaneously open. Upon receiving the disconnect signals from both limit switches 24, the control system stops the drive motor 22. When the rack 21 retracts between the first shell 1 and the second shell 2, the limit switch 24 on the side of the drive motor 22 away from the thrust device 231 is disconnected, and the limit switch 24 on the other side is closed. The control system receives the open signal and the care signal of the limit switch 24, and the control system controls the drive motor 22 to stop rotating, thereby realizing automatic control of the push rod actuator and improving the automation of the push rod actuator.

[0027] like Figure 5 The push rod actuator with static holding force shown in the figure, the gear shaft 25 includes a connecting part 251, a first limiting part 252, a second limiting part 253, and an engaging part 254. The connecting part 251, the first limiting part 252, the second limiting part 253, and the engaging part 254 are coaxially connected in sequence. The connecting part 251 is driven by the motor shaft of the drive motor 22. The first limiting part 252 and the second limiting part 253 are respectively clamped on both sides of the protrusion provided on the second shell 2. The engaging part 254 is provided with teeth along the side wall, and the engaging part 254 is engaged with the rack 21.

[0028] The above examples are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that the understanding can understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A push rod actuator with static holding force, characterized in that: The invention comprises a first shell (1) and a second shell (2), wherein the first shell (1) and the second shell (2) are connected with each other through openings; a rack (21) is slidably connected to the bottom surface of the second shell (2), the rack (21) is driven and connected to a drive motor (22), the drive motor (22) is clamped between the first shell (1) and the second shell (2), and the drive motor (22) drives the rack (21) to move back and forth; the rack (21) is provided with a locking mechanism (23), the locking mechanism (23) is connected to the first shell (1), and the locking mechanism (23) locks the rack (21); the locking mechanism (23) comprises a thrust device (231) and a locking block (232), the thrust device (231) and the locking block (232) are driven and connected, and the thrust device (231) drives the locking block (232) to move, so that the locking block (232) and the rack (21) are clamped.

2. The push rod actuator with static holding force according to claim 1, characterized in that: The locking block (232) is configured as a triangular wedge block, the long side of the locking block (232) is arranged close to the rack (21), and the long side of the locking block (232) is provided with a tooth portion corresponding to the rack (21); the short side of the locking block (232) away from the thrust device (231) is provided with a through groove (2321), the through groove (2321) is inclined along the short side, the locking block (232) is connected to the first shell (1) at an angle away from the through groove (2321), a driving shaft (2322) is passed through the through groove (2321), the driving shaft (2322) and the thrust device (231) are drivingly connected, and the thrust device (231) pushes the driving shaft (2322) to move along the through groove (2321).

3. The push rod actuator with static holding force according to claim 2, characterized in that: The thrust device (231) includes an electromagnet (2311), the electromagnet (2311) is configured as a power-off self-holding electromagnet, the electromagnet (2311) is slidably connected to an armature (2312), the armature (2312) is sleeved with a spring (2313), and the armature (2312) is connected to a drive shaft (2322); the drive shaft (2322) is slidably connected to a waist hole provided in the first housing (1); when the electromagnet (2311) loses power, the electromagnet (2311) drives the armature (2312) to move toward the electromagnet (2311), and the armature (2312) squeezes the spring (2313); when the electromagnet (2311) is powered on, the spring (2313) is restored, and the spring (2313) pushes the armature (2312) to move away from the electromagnet (2311).

4. The push rod actuator with static holding force according to claim 1, characterized in that: The rack (21) is provided with a notch (211), the notch (211) being provided on a side of the rack (21) close to the drive motor (22), and the notch (211) comprising an opening direction notch (2111) and a closing direction notch (2112); two opening direction notches (2111) are provided, the opening direction notch (2111) being provided on an end of the rack (21) close to the thrust device (231), and the closing direction notch (2112) being provided on an end of the rack (21) away from the thrust device (231); the second housing (2) is connected to a limit switch (24), two limit switches (24) are provided, the two limit switches (24) being provided on both sides of the drive motor (22), and the two limit switches (24) and the two opening direction notches (2111) being provided correspondingly.

5. The push rod actuator with static holding force according to claim 1, characterized in that: The drive motor (22) and the rack (21) are arranged in a cross-like manner. The drive motor (22) is driven by a gear shaft (25). The gear shaft (25) is rotatably connected between the first housing (1) and the second housing (2). The end of the gear shaft (25) away from the drive motor (22) is meshed with the rack (21).

6. The push rod actuator with static holding force according to claim 1, characterized in that: The rack (21) is provided with double rows of teeth.

7. The push rod actuator with static holding force according to claim 1, characterized in that: A flexible block (26) is provided at one end of the rack (21) away from the locking mechanism (23).

8. The push rod actuator with static holding force according to claim 5, characterized in that: The gear shaft (25) comprises a connecting portion (251), a first limiting portion (252), a second limiting portion (253), and an engaging portion (254); the connecting portion (251), the first limiting portion (252), the second limiting portion (253), and the engaging portion (254) are coaxially connected in sequence; the connecting portion (251) is drivingly connected to the motor shaft of the driving motor (22); the first limiting portion (252) and the second limiting portion (253) are respectively clamped on both sides of a protrusion provided on the second shell (2); the engaging portion (254) is provided with teeth along the side wall; the engaging portion (254) is engaged with the rack (21).

9. The push rod actuator with static holding force according to claim 1, characterized in that: The second shell (2) is provided with a locking ear (27), and the locking ear (27) is arranged along the bottom of the second shell (2).

Images