Linear type linear driver

Abstract

The utility model relates to the technical field of electrical machinery, in particular to a linear type linear driver which comprises an outer pipe, a planetary gear motor is fixed in the outer pipe, the output end of the planetary gear motor is in transmission connection with a lead screw, a guide sliding block is sleeved and screwed on a rod body of the lead screw, one end of the guide sliding block is inserted and fixed in an inner pipe, and the other end of the guide sliding block is in threaded connection with the inner pipe. The inner pipe is movably inserted into the outer pipe, and one end of the inner pipe is in threaded connection with a connecting screwed plug; the linear type linear driver has the beneficial effects that the linear type linear driver provided by the utility model is compact in structure, small in space and low in cost, and is provided with the microswitch. According to the technical scheme, the linear type linear driver with the microswitch is characterized in that a motor is hidden in an outer tube; the whole mechanism is simple, economical, practical and attractive in appearance; the problem that the structure is not compact due to the fact that the motor of an existing driver is externally arranged is further solved, and the motor can be hidden in the outer pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical machinery, in particular to a linear drive. Background Art

[0002] Most of the linear actuators under the current existing technology adopt a structure in which the motor shaft and the worm shaft are perpendicular or parallel.

[0003] In the prior art, the motor gearbox is open, with multi-stage transmission to the screw nut. Their disadvantages are large installation size, complex structure, exposed motor, unsightly appearance, difficulty in installation in a small space, and poor protection for outdoor use. Linear actuators without built-in micro switches need to install limit switches externally, receive signals to automatically power off, or use motor stall current overload protection, or determine the operating status of the actuator by detecting Hall signals, etc. The above control methods are complex and costly, which is not conducive to market use.

[0004] Therefore, we need a linear actuator to solve the problem of the non-compact structure caused by the external motor of the existing actuator, and the motor can be hidden in the outer tube. Utility Model Content

[0005] The utility model aims to provide a linear actuator to solve the problem of the existing actuator's motor being placed outside the prior art, which is not compact in structure, and the motor can be hidden in an outer tube.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a linear actuator, comprising an outer tube, a planetary reduction motor fixed inside the outer tube, the output end of the planetary reduction motor is transmission-connected to a lead screw, a guide slider is sleeved on the rod body of the lead screw and threadedly connected, one end of the guide slider is plugged and fixed in the inner tube, the inner tube is movably plugged in the outer tube, and one end of the inner tube is threadedly connected to a connecting screw plug.

[0007] Preferably, a rear end cover is threadedly connected to one end of the inner tube away from the inner tube, and the surfaces of the rear end cover and the connecting thread plug are both provided with perforations.

[0008] Preferably, a slot is provided on the outer wall of the outer tube, a switch strip is fixed inside the slot, and a micro switch is installed on the surface of the switch strip.

[0009] Preferably, a motor connecting seat is fixed to the inner wall of the outer tube, and the motor connecting seat is on one side of the planetary reduction motor. A connecting seat is provided on one side of the motor connecting seat, and a retaining spring is clamped between the connecting seat and the motor connecting seat. A coupling sleeve is fixed to the power output end of the planetary reduction motor, and the coupling sleeve passes through the connecting seat and the motor connecting seat, and one end of the coupling sleeve is fixed to the other end of the screw rod.

[0010] Preferably, the other end of the screw rod is sleeved with a ball bearing and a thrust ball bearing, both of which are fixed in the inner ring opening of the guide slider, the guide slider is fixed to the inner wall of the outer tube, the guide slider is an annular structure with an inner ring opening of an "I"-shaped circular opening, two thrust ball bearings are provided, the two thrust ball bearings are respectively fixed in the slots at both ends of the guide slider, and the ball bearing is in the middle slot of the guide slider.

[0011] Preferably, a push block is integrally formed on the surface of the guide sliding block, the push block is slidably connected in a guide groove, the guide groove is provided on the inner wall of the outer tube, and the micro switch extends into the guide groove.

[0012] Preferably, one end of the outer tube is sleeved with a front end cover which is threadedly connected. The front end cover is sleeved on the outside of the guide sleeve. The guide sleeve is sleeved on the tube body of the inner tube. The inner ring opening of the front end cover is a "convex" shaped circular opening. An oil seal is fixed at the notch at one end of the front end cover, and the oil seal is sleeved on the tube body of the inner tube.

[0013] Preferably, the other end of the screw rod is sleeved with a locking nut threadedly connected thereto.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The linear linear drive proposed by the utility model has a compact structure, small space, low cost, and a linear linear drive with a micro switch. The technical solution of the utility model is a linear linear drive with a micro switch, and the motor is hidden in the outer tube. The overall structure is simple, economical and practical, and beautiful in appearance; it further solves the problem of the existing drive's motor being externally placed and the structure is not compact, and the motor can be hidden in the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0018] In the figure: 1-connecting plug; 2-inner tube; 3-outer tube; 4-switch strip; 5-micro switch; 6-bearing seat; 7-connecting seat; 8-circlip; 9-motor connecting seat; 10-planetary reduction motor; 11-rear end cover; 12-oil seal; 13-front end cover; 14-guide sleeve; 15-screw rod; 16-guide slider; 17-ball bearing; 18-thrust ball bearing; 19-locking nut; 20-coupling sleeve. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 to Figure 2 The utility model provides a technical solution: a linear actuator, comprising an outer tube 3, a planetary reduction motor 10 is fixed inside the outer tube 3, the output end of the planetary reduction motor 10 is transmission-connected with a screw rod 15, a guide slider 16 is sleeved on the rod body of the screw rod 15 and screwed, one end of the guide slider 16 is plugged and fixed in the inner tube 2, and a rear end cover 11 is screwed on the end of the inner tube 2 away from the inner tube 2, and the surfaces of the rear end cover 11 and the connecting wire plug 1 are both provided with through holes, the inner tube 2 is movably plugged in the outer tube 3, and a connecting wire plug 1 is screwed on one end of the inner tube 2.

[0021] A card slot is provided on the outer wall of the outer tube 3, a switch strip 4 is fixed inside the card slot, and a micro switch 5 is installed on the surface of the switch strip 4; a motor connection seat 9 is fixed on the inner wall of the outer tube 3, and the motor connection seat 9 is located on one side of the planetary reduction motor 10, and a connection seat 7 is provided on one side of the motor connection seat 9, and a retaining spring 8 is clamped between the connection seat 7 and the motor connection seat 9, and a coupling sleeve 20 is sleeved and fixed on the power output end of the planetary reduction motor 10, and the coupling sleeve 20 passes through the connection seat 7 and the motor connection seat 9, and one end of the coupling sleeve 20 is sleeved and fixed on the other end of the screw rod 15; the other end of the screw rod 15 is sleeved with a ball shaft The bearing 17 and the thrust ball bearing 18 are both fixed in the inner ring of the guide slider 16. The guide slider 16 is fixed to the inner wall of the outer tube 3. The guide slider 16 has an annular structure with an inner ring of an "I"-shaped round mouth. Two thrust ball bearings 18 are provided. The two thrust ball bearings 18 are respectively fixed in the notches at both ends of the guide slider 16, and the ball bearing 17 is in the middle notch of the guide slider 16; a push block is integrally formed on the surface of the guide slider 16, and the push block is slidably connected in the guide groove. The guide groove is opened on the inner wall of the outer tube 3, and the micro switch 5 extends into the guide groove.

[0022] One end of the outer tube 3 is sleeved with a front end cover 13 which is threadedly connected. The front end cover 13 is sleeved on the outside of the guide sleeve 14. The guide sleeve 14 is sleeved on the tube body of the inner tube 2. The inner ring opening of the front end cover 13 is a "convex" shaped circular opening. An oil seal 12 is fixed at the notch at one end of the front end cover 13. The oil seal 12 is sleeved on the tube body of the inner tube 2; the other end of the screw rod 15 is sleeved with a locking nut 19 which is threadedly connected.

[0023] The two ends of the outer tube 3 are connected to the front cover 13 and the rear cover 11. The bearing seat 6 is fixed in the outer tube 3. One end of the bearing seat 6 is fixed by a retaining spring 8. The screw rod 15 is connected to the ball bearing 17 and the thrust ball bearing 18. The ball bearing 17 and the thrust ball bearing 18 are fixed in the bearing seat 6. The guide slider 16 is driven by the screw rod 15 to slide and connect in the outer tube 3. With the forward and reverse rotation of the screw rod 15, it makes a linear reciprocating motion. The rear end of the screw rod 15 is connected to the planetary reduction motor 10 through the coupling sleeve 20. The micro switch 5 is fixed on the switch bar 4, and the switch bar 4 is fixed in the slot of the outer tube 3. When the guide slider 16 moves back and forth and contacts the micro switch 5, the planetary reduction motor 10 stops, and reverses when switching the DC direction, thereby reciprocating.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear actuator, comprising an outer tube (3), wherein a planetary reduction motor (10) is fixed inside the outer tube (3), characterized in that: The output end of the planetary reduction motor (10) is transmission-connected with a screw rod (15), a guide slider (16) is sleeved on the rod body of the screw rod (15) and is screwed, one end of the guide slider (16) is inserted and fixed in the inner tube (2), the inner tube (2) is movably inserted in the outer tube (3), and one end of the inner tube (2) is screwed with a connecting screw plug (1).

2. A linear actuator according to claim 1, characterized in that: A rear end cover (11) is screwed to one end of the inner tube (2) away from the inner tube (2), and the surfaces of the rear end cover (11) and the connecting thread plug (1) are both provided with perforations.

3. A linear actuator according to claim 1, characterized in that: A slot is provided on the outer wall of the outer tube (3), a switch strip (4) is fixed inside the slot, and a micro switch (5) is installed on the surface of the switch strip (4).

4. The linear actuator according to claim 1, characterized in that: A motor connection seat (9) is fixed to the inner wall of the outer tube (3), the motor connection seat (9) is located at one side of the planetary reduction motor (10), a connection seat (7) is provided on one side of the motor connection seat (9), a retaining spring (8) is clamped between the connection seat (7) and the motor connection seat (9), a coupling sleeve (20) is sleeved and fixed at the power output end of the planetary reduction motor (10), the coupling sleeve (20) passes through the connection seat (7) and the motor connection seat (9), and one end of the coupling sleeve (20) is sleeved and fixed on the other end of the screw rod (15).

5. The linear actuator according to claim 1, characterized in that: The other end of the screw rod (15) is sleeved with a ball bearing (17) and a thrust ball bearing (18). The ball bearing (17) and the thrust ball bearing (18) are both fixed in the inner ring opening of the guide slider (16). The guide slider (16) is fixed to the inner wall of the outer tube (3). The guide slider (16) is an annular structure with an inner ring opening in the shape of an "I" character. Two thrust ball bearings (18) are provided. The two thrust ball bearings (18) are respectively fixed in the notches at both ends of the guide slider (16). The ball bearing (17) is located in the middle notch of the guide slider (16).

6. A linear actuator according to claim 3, characterized in that: A push block is integrally formed on the surface of the guide slider (16), and the push block is slidably connected in a guide groove. The guide groove is provided on the inner wall of the outer tube (3), and the micro switch (5) extends into the guide groove.

7. The linear actuator according to claim 1, characterized in that: One end of the outer tube (3) is sleeved with a front end cover (13) threadedly connected thereto. The front end cover (13) is sleeved on the outside of a guide sleeve (14). The guide sleeve (14) is sleeved on the tube body of the inner tube (2). The inner ring opening of the front end cover (13) is a "convex" shaped circular opening. An oil seal (12) is fixed at a notch at one end of the front end cover (13). The oil seal (12) is sleeved on the tube body of the inner tube (2).

8. The linear actuator according to claim 1, characterized in that: The other end of the screw rod (15) is sleeved with a locking nut (19) threadedly connected thereto.

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