Electric push rod driven by brushless motor

Abstract

The utility model discloses an electric push rod driven by a brushless motor, which comprises a base, an outer sleeve is fixedly arranged on one side of the top end of the base, an inner sleeve is sleeved and connected in the outer sleeve, sliding grooves are arranged on two sides of the inner wall of the outer sleeve, a lead screw seat is slidably connected between the two sliding grooves, and the lead screw seat is fixedly connected with the base. The top end of the lead screw base is fixedly connected with the bottom end of an outer sleeve, and the bottom end of the interior of the outer sleeve is rotationally connected with a lead screw. According to the electric push rod structure driven by the brushless motor, the heat dissipation assembly is installed in the brushless motor installation groove, the heat dissipation assembly is matched with the circulating pump through the annular cooling pipe, and the circulating pump is controlled by the temperature control switch to pump cooling oil in the oil storage cavity into the annular cooling pipe for circulation. The brushless motor can be quickly cooled, and the operation stability of the electric push rod is effectively improved.

Description

Technical Field

[0001] The utility model relates to an electric push rod driven by a brushless motor, belonging to the technical field of electric push rods. Background Art

[0002] An electric linear actuator is an electric drive device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod. The movement of an object is controlled by the extension and retraction of the electric linear actuator. Currently, electric linear actuators are widely used in mechanical equipment.

[0003] During the use of traditional electric linear actuators, the power of the electric linear actuator comes from the coordinated control of the extension and retraction of the motor and the lead screw. At present, the motor of the electric linear actuator is prone to generate heat during long-term operation. Since there is no heat dissipation structure on the surface of the motor, the motor operates under high temperature conditions for a long time, which affects the service life of the electric linear actuator. Utility Model Content

[0004] The purpose of the utility model is to provide an electric push rod driven by a brushless motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: it includes a base, an outer sleeve is fixedly provided on one side of the top of the base, the inner sleeve of the outer sleeve is connected to the inner sleeve, sliding grooves are provided on both sides of the inner wall of the outer sleeve, a screw seat is slidably connected between the two sliding grooves, the top of the screw seat is fixedly connected to the bottom of the outer sleeve, the bottom end of the inner sleeve is rotatably connected to the screw, the screw is threadedly connected to the screw seat, a fixing ring is fixedly provided on the other side of the top of the base, a packaging sleeve is nested in the fixing ring, a motor groove is provided at the bottom end of the packaging sleeve, a heat dissipation component is fixedly installed on the inner wall of the motor groove, a brushless motor is fixedly installed inside the motor groove, a transmission component is fixedly installed between the brushless motor and the screw, and a mounting flange is fixedly provided at the bottom end of the base.

[0006] In the above-mentioned electric push rod driven by the brushless motor, the heat dissipation assembly includes an annular cooling pipe and a circulating pump. The annular cooling pipe is fixedly connected to the inner wall of the motor slot. An oil storage cavity is opened on the top of the packaging sleeve. A circulating pump is fixedly installed inside the oil storage cavity. The liquid outlet end of the circulating pump is fixedly connected to one end of the annular cooling pipe, and the other end of the annular cooling pipe is communicated with the inside of the oil storage cavity.

[0007] In the above-mentioned electric push rod driven by the brushless motor, a temperature control switch is fixedly installed at the top end of the motor slot, and the circulating pump is electrically connected to the external power supply through the temperature control switch.

[0008] In the above-mentioned electric push rod driven by a brushless motor, the transmission assembly includes a worm wheel, a worm, a first bevel gear and a second bevel gear. A cavity is opened inside the base, and worms are rotatably connected to the inner walls of the cavity on both sides. The bottom end of the lead screw extends to the inside of the cavity and a worm wheel is fixedly installed thereon. The worm wheel is meshingly connected to the worm, and one end of the worm is fixedly installed with a second bevel gear. The output shaft of the brushless motor extends to the inside of the cavity and a first bevel gear is fixedly installed thereon. The first bevel gear is meshingly connected to the second bevel gear.

[0009] In the above-mentioned electric push rod driven by the brushless motor, grooves are provided on both sides of the inner wall of the fixing ring, and limiting blocks are nested inside the two grooves. Reset springs are fixedly installed at the bottom of the two grooves, and one end of the reset spring is fixedly connected to the side of the corresponding limit block. Limiting grooves are provided on the bottom of both sides of the packaging sleeve, and the limit blocks are nested and connected to the limit grooves.

[0010] In the above-mentioned electric push rod driven by the brushless motor, a through groove is provided at the top of the groove, a push block is slidably connected inside the through groove, and the bottom end of the push block is fixedly connected to the side of the top end of the limit block.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The electric push rod structure driven by the brushless motor has a heat dissipation component installed inside the brushless motor mounting groove. The heat dissipation component cooperates with the annular cooling pipe and the circulating pump, and the circulating pump is controlled by the temperature control switch to draw the cooling oil in the oil storage cavity into the annular cooling pipe for circulation, which can quickly cool the brushless motor and effectively improve the stability of the electric push rod operation.

[0013] 2. The packaging sleeve and the fixing ring are nested and fixed by the limit block and the limit groove. The limit block controls the extension and contraction through the reset spring and the push block, which facilitates the disassembly of the packaging sleeve and effectively improves the maintenance convenience of the brushless drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the electric push rod driven by the brushless motor of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the electric push rod driven by the brushless motor of the utility model;

[0016] Figure 3 The electric push rod driven by the brushless motor of the utility model Figure 2 A partial enlarged view of point A in the middle.

[0017] In the figure: 1. base; 2. outer sleeve; 3. packaging sleeve; 4. fixing ring; 5. mounting flange; 6. inner sleeve; 7. lead screw; 8. lead screw seat; 9. worm gear; 10. worm; 11. annular cooling pipe; 12. first bevel gear; 13. second bevel gear; 14. oil storage chamber; 15. circulating pump; 16. temperature control switch; 17. brushless motor; 18. limit block; 19. groove; 20. reset spring; 21. push block; 22. limit groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0019] See also Figure 1-3 The utility model provides a technical solution for an electric push rod driven by a brushless motor:

[0020] according to Figure 1-3 As shown, it includes a base 1, an outer sleeve 2 is fixedly provided on one side of the top of the base 1, an inner sleeve 6 is connected to the inner sleeve of the outer sleeve 2, sliding grooves are provided on both sides of the inner wall of the outer sleeve 2, a screw seat 8 is slidably connected between the two sliding grooves, the top of the screw seat 8 is fixedly connected to the bottom end of the outer sleeve 2, a screw 7 is rotatably connected to the bottom end of the inner part of the outer sleeve 2, the screw 7 is threadedly connected to the screw seat 8, a fixing ring 4 is fixedly provided on the other side of the top of the base 1, a packaging sleeve 3 is nested in the fixing ring 4, a motor groove is provided at the bottom end of the packaging sleeve 3, a heat dissipation component is fixedly installed on the inner wall of the motor groove, a brushless motor 17 is fixedly installed inside the motor groove, a transmission component is fixedly installed between the brushless motor 17 and the screw 7, and a mounting flange 5 is fixedly provided at the bottom end of the base 1.

[0021] Specifically, the heat dissipation component is used to dissipate the heat of the brushless motor 17, thereby effectively improving the heat dissipation efficiency of the electric linear actuator.

[0022] according to Figure 1 , Figure 2 and Figure 3 As shown, the heat dissipation component includes an annular cooling pipe 11 and a circulating pump 15. The annular cooling pipe 11 is fixedly connected to the inner wall of the motor slot. An oil storage cavity 14 is opened on the top of the packaging sleeve 3. The circulating pump 15 is fixedly installed inside the oil storage cavity 14. The liquid outlet end of the circulating pump 15 is fixedly connected to one end of the annular cooling pipe 11, and the other end of the annular cooling pipe 11 is communicated with the inside of the oil storage cavity 14.

[0023] A temperature control switch 16 is fixedly mounted on the top of the motor slot, and the circulation pump 15 is electrically connected to an external power source via the temperature control switch 16 .

[0024] Specifically, the operation of the circulation pump 15 is controlled by the temperature control switch 16 , and the oil in the oil storage chamber 14 is circulated and dissipated by the circulation pump 15 , thereby improving the heat dissipation efficiency of the brushless motor 17 .

[0025] according to Figure 1 , Figure 2 and Figure 3 As shown, the transmission assembly includes a worm wheel 9, a worm 10, a first bevel gear 12 and a second bevel gear 13. A cavity is opened inside the base 1, and the worm 10 is rotatably connected to both sides of the inner wall of the cavity. The bottom end of the lead screw 7 extends to the inside of the cavity and a worm wheel 9 is fixedly installed. The worm wheel 9 is meshingly connected with the worm 10. One end of the worm 10 is fixedly installed with the second bevel gear 13. The output shaft of the brushless motor 17 extends to the inside of the cavity and a first bevel gear 12 is fixedly installed. The first bevel gear 12 is meshingly connected with the second bevel gear 13.

[0026] Specifically, the worm 10 is driven to rotate by the cooperation of the first bevel gear 12 and the second bevel gear 13 , and the worm 10 is meshed with the worm wheel 9 , thereby driving the screw 7 to rotate.

[0027] according to Figure 1 , Figure 2 and Figure 3 As shown, grooves 19 are provided on both sides of the inner wall of the fixing ring 4, and limiting blocks 18 are nested inside the two grooves 19. Reset springs 20 are fixedly installed at the bottom of the two grooves 19, and one end of the reset spring 20 is fixedly connected to the side of the corresponding limit block 18. Limiting grooves 22 are provided on the bottom of both sides of the packaging sleeve 3, and the limit blocks 18 are nested and connected with the limit grooves 22.

[0028] A through slot is formed at the top of the groove 19 , and a push block 21 is slidably connected inside the through slot. The bottom end of the push block 21 is fixedly connected to the side of the top end of the limiting block 18 .

[0029] Specifically, the movement of the limit block 18 is controlled by the cooperation of the push block 21 and the return spring 20 , and the limit block 18 and the limit groove 22 are nested and separated by the movement of the limit block 18 , so that the disassembly and installation of the packaging sleeve 3 are convenient.

[0030] Working principle: When the electric push rod driven by the brushless motor of the utility model is used, it is installed through the mounting flange 5 and the power is turned on. When the electric push rod is continuously extended and retracted, when the heat dissipated by the brushless motor 17 reaches the threshold value of the temperature control switch 16, the circulating pump 15 is turned on through the temperature control switch 16, and the coolant inside the oil storage cavity 14 is pumped into the annular cooling pipe 11 for circulation cooling through the circulating pump 15, thereby improving the heat dissipation efficiency of the brushless motor 17;

[0031] When the brushless motor 17 needs to be repaired, the push block 21 is manually pushed to drive the limit block 18 to separate from the limit groove 22 , and then the packaging sleeve 3 is taken out, so as to facilitate the repair of the brushless motor 17 .

[0032] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. An electric push rod driven by a brushless motor, comprising a base (1), characterized in that: An outer sleeve (2) is fixedly provided on one side of the top of the base (1), the inner sleeve (6) is sleeved inside the outer sleeve (2), sliding grooves are provided on both sides of the inner wall of the outer sleeve (2), a screw seat (8) is slidably connected between the two sliding grooves, the top of the screw seat (8) is fixedly connected to the bottom of the outer sleeve (2), the bottom of the inner sleeve (2) is rotatably connected to a screw (7), the screw (7) is threadedly connected to the screw seat (8), a fixing ring (4) is fixedly provided on the other side of the top of the base (1), a packaging sleeve (3) is nested inside the fixing ring (4), a motor slot is provided at the bottom of the packaging sleeve (3), a heat dissipation component is fixedly installed on the inner wall of the motor slot, a brushless motor (17) is fixedly installed inside the motor slot, a transmission component is fixedly installed between the brushless motor (17) and the screw (7), and a mounting flange (5) is fixedly provided at the bottom of the base (1).

2. The electric linear actuator driven by a brushless motor according to claim 1, characterized in that: The heat dissipation component comprises an annular cooling pipe (11) and a circulation pump (15); the annular cooling pipe (11) is fixedly connected to the inner wall of the motor slot; an oil storage cavity (14) is provided at the top of the packaging sleeve (3); a circulation pump (15) is fixedly installed inside the oil storage cavity (14); a liquid outlet end of the circulation pump (15) is fixedly connected to one end of the annular cooling pipe (11); and the other end of the annular cooling pipe (11) is communicated with the inside of the oil storage cavity (14).

3. The electric linear actuator driven by a brushless motor according to claim 2, characterized in that: A temperature control switch (16) is fixedly installed at the top end of the motor slot, and the circulation pump (15) is electrically connected to an external power supply via the temperature control switch (16).

4. The electric linear actuator driven by a brushless motor according to claim 1, characterized in that: The transmission assembly comprises a worm wheel (9), a worm (10), a first bevel gear (12) and a second bevel gear (13); a cavity is provided inside the base (1); the worm (10) is rotatably connected to both sides of the inner wall of the cavity; the bottom end of the lead screw (7) extends into the cavity and is fixedly installed with a worm wheel (9); the worm wheel (9) is meshingly connected with the worm (10); one end of the worm (10) is fixedly installed with a second bevel gear (13); the output shaft of the brushless motor (17) extends into the cavity and is fixedly installed with a first bevel gear (12); the first bevel gear (12) is meshingly connected with the second bevel gear (13).

5. The electric linear actuator driven by a brushless motor according to claim 1, characterized in that: Grooves (19) are provided on both sides of the inner wall of the fixing ring (4), and limiting blocks (18) are nested inside the two grooves (19). Return springs (20) are fixedly installed at the bottom of the two grooves (19), and one end of the return spring (20) is fixedly connected to the side of the corresponding limiting block (18). Limiting grooves (22) are provided on the bottom of both sides of the packaging sleeve (3), and the limiting blocks (18) are nested and connected with the limiting grooves (22).

6. The electric linear actuator driven by a brushless motor according to claim 5, characterized in that: A through slot is provided at the top of the groove (19), a push block (21) is slidably connected inside the through slot, and the bottom end of the push block (21) is fixedly connected to the side of the top end of the limit block (18).

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