Bidirectional telescopic mechanism

Abstract

The utility model belongs to the technical field of telescopic mechanisms, and particularly relates to a two-way telescopic mechanism which comprises a first screw and a second screw, the first screw and the second screw are vertically arranged and distributed, the thread turning directions of the outer surfaces of the first screw and the second screw are opposite, and the outer surface of the first screw is in threaded connection with a first threaded pipe; lubricating oil prevents the first screw, the first threaded pipe, the second screw and the second threaded pipe from being abraded, the high-precision and symmetrical two-way transmission effect is guaranteed, two-way telescopic posture synchronous movement is achieved, the first screw, the first threaded pipe, the second screw and the second threaded pipe of different lengths can be replaced at any time according to actual requirements, and the working efficiency is improved. According to the technology, two-way stretching and retracting can be achieved only through one motor, the stretching and retracting length is not limited, the space of an installation area can be saved, the application range is wide, limitation of application occasions is avoided, and the problem that the application range and the application occasions are prone to being limited in the one-way stretching and retracting process of an existing two-way stretching and retracting mechanism is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor bidirectional telescopic technology, in particular to a bidirectional telescopic mechanism. Background Art

[0002] Nowadays, many mechanical equipments need to use telescopic mechanisms to drive the actuators to move up and down, front and back, left and right, so that the actuators can give the controlled objects corresponding motion trajectories to change the motion state of the controlled objects.

[0003] Most of the existing two-way telescopic technologies use telescopic motors to achieve unidirectional telescopic extension, and one telescopic motor can only achieve unidirectional telescopic extension. If two-way telescopic extension is required, two telescopic motors in opposite directions must be used to work simultaneously. The two telescopic motors will take up a larger installation space, which places relatively high demands on space. The maximum sliding distance of the mover of a single telescopic motor inside the stator determines the telescopic stroke, and the telescopic length is also limited by the motor stroke. Long-term use of two telescopic motors will cause wear of internal mechanical components, and the telescopic motors will not move smoothly and flexibly, resulting in mechanical failures such as component jamming, making the movement postures of the two telescopic motors unsynchronized. It is easy for the two telescopic motors to have an asymmetric telescopic distance in both directions, which reduces the transmission accuracy and is limited by the usage scenarios, limiting the scope of use of the two-way telescopic structure. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and solve the problem that the use scope and occasions of the prior bidirectional telescopic mechanism are easily limited during the unidirectional telescopic process.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a two-way telescopic mechanism, including a first screw and a second screw:

[0006] The first screw and the second screw are arranged in an upper and lower arrangement, the threads of the outer surfaces of the first screw and the second screw have opposite directions, the outer surface of the first screw is threadedly connected to a first threaded tube, the outer surface of the second screw is threadedly connected to a second threaded tube, the outer surfaces of the first threaded tube and the second threaded tube are both fixed with sliders, and the outer surfaces of the sliders are both slidably connected to guide rails;

[0007] A protective cover is arranged between the first screw and the second screw, and an accommodating cavity is opened inside the protective cover. A diverter groove and an oil collecting groove are respectively opened on the upper and lower sides of the inner wall of the accommodating cavity. The diverter groove is connected with the oil collecting groove. The oil collecting groove is provided with multiple grooves and distributed vertically in parallel. An oil filling pipe that penetrates into the oil collecting groove is inserted at the rear end of the protective cover.

[0008] In a preferred technical solution of the utility model, a driven gear is detachably connected between the first screw rod and the second screw rod, and either end of the driven gear is meshingly connected to a driving gear.

[0009] In a preferred technical solution of the utility model, a driving shaft is fixed at the center of the driving gear, and a reduction motor is transmission-connected to the lower end of the driving shaft.

[0010] In a preferred technical solution of the utility model, the driving gear and the driven gear are located inside the protective cover.

[0011] In a preferred technical solution of the utility model, bearings are installed at one end of the first screw rod and the second screw rod close to the driven gear.

[0012] In a preferred technical solution of the present utility model, the length of the first screw rod is equal to the length of the first threaded tube, and the length of the second screw rod is equal to the length of the second threaded tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects: when the motor drives the active gear to rotate, the driven gear rotates slowly; the threads on the outer surfaces of the first screw and the second screw are opposite to each other; the inner walls of the first threaded tube box and the second threaded tube are provided with threads matching the outer surfaces of the first screw and the second screw; the first screw provides power for the first threaded tube, and the second screw provides power for the second threaded tube; the technology only requires one motor to achieve bidirectional telescopic extension; the oil filling tube injects lubricating oil into the diverter groove and the oil collecting groove respectively, and can automatically apply the lubricating oil to the surface of the screw for lubrication; the lubricating oil prevents the first screw, the first threaded tube, the second screw, and the second threaded tube from being worn; the lubricating oil maintains the stability of the first screw driving the first threaded tube and the second screw driving the second threaded tube, ensuring a high-precision and symmetrical bidirectional transmission effect; the bidirectional telescopic posture moves synchronously; the first screw, the first threaded tube, the second screw, and the second threaded tube of different lengths can be replaced at any time according to actual requirements; the telescopic length is not limited, the space in the installation area can be saved, the use range is wide, and it is not limited by the use occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is an assembly effect diagram of the driven gear and the driving gear of the utility model;

[0016] Figure 3 This is a schematic diagram showing the overall structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the protective cover of the utility model;

[0018] Figure 5 It is a schematic diagram of the external structure of the guide rail of the utility model.

[0019] In the figure: 1. reduction motor; 2. driving gear; 3. driven gear; 4. bearing; 5. first screw; 6. second screw; 7. first threaded tube; 8. second threaded tube; 9. protective cover; 10. oil filling tube; 11. diverter trough; 12. oil collecting trough; 13. accommodating chamber; 14. guide rail; 15. slider; 16. driving shaft. DETAILED DESCRIPTION

[0020] See also Figure 1-5The utility model provides a bidirectional telescopic mechanism, including a first screw rod 5 and a second screw rod 6: the first screw rod 5 and the second screw rod 6 are arranged in an upper and lower arrangement, the threads of the outer surfaces of the first screw rod 5 and the second screw rod 6 are opposite to each other, the outer surface of the first screw rod 5 is threadedly connected with a first threaded tube 7, the outer surface of the second screw rod 6 is threadedly connected with a second threaded tube 8, the outer surfaces of the first threaded tube 7 and the second threaded tube 8 are both fixed with sliders 15, the outer surfaces of the sliders 15 are both slidably connected with guide rails 14, the first screw rod 5 and the second screw rod 6 are detachably connected with a driven gear 3, any end of the driven gear 3 is meshingly connected with a driving gear 2, the center of the driving gear 2 is fixed with a driving shaft 16, and the driving shaft 1 6 is connected to the lower end of the transmission with a reduction motor 1, the driving gear 2 and the driven gear 3 are located inside the protective cover 9, the reduction motor 1 drives the driving shaft 16 to rotate, and the driving shaft 16 drives the driving gear 2 to rotate so that the driven gear 3 rotates slowly, the first screw 5 and the second screw 6 are installed with a bearing 4 near one end of the driven gear 3, the bearing 4 increases the smoothness of the first screw 5 and the second screw 6 when rotating, the length of the first screw 5 is equal to the length of the first threaded tube 7, the length of the second screw 6 is equal to the length of the second threaded tube 8, the driven gear 3 drives the first screw 5 and the second screw 6 to rotate in the same direction at the same time, and the inner walls of the first threaded tube 7 and the second threaded tube 8 are provided with a screw thread that is similar to the outer surface of the first screw 5 and the second screw 6 The threads of the first screw 5 and the first threaded tube 7 are meshed with each other for transmission, and the threads of the second screw 6 and the second threaded tube 8 are meshed with each other for transmission. The first screw 5 provides power for the first threaded tube 7. The first threaded tube 7 allows the corresponding slider 15 to slide along the corresponding guide rail 14 as the first screw 5 rotates. The second screw 6 provides power for the second threaded tube 8. The second threaded tube 8 allows the corresponding slider 15 to slide along the corresponding guide rail 14 as the second screw 6 rotates. The threads of the first screw 5 and the second screw 6 are opposite to each other, and the threads of the inner walls of the first threaded tube 7 and the second threaded tube 8 are also opposite to each other. The movement between the first threaded tube 7 and the second threaded tube 8 is The directions of movement are opposite to each other. By changing the direction in which the reduction motor 1 drives the driving gear 2 to rotate, the rotation direction of the driven wheel can be changed. The first screw 5 and the second screw 6 are simultaneously switched as the rotation direction of the driven wheel is switched. By simultaneously switching the rotation directions of the first screw 5 and the second screw 6, the rotation directions of the first threaded tube 7 and the second threaded tube 8 can be switched at the same time. This technology only requires one motor to achieve bidirectional telescopic movement, and the bidirectional telescopic postures move synchronously. The first screw 5, the first threaded tube 7, the second screw 6 and the second threaded tube 8 of different lengths can be replaced at any time according to actual requirements. The telescopic length is not limited, which can save space in the installation area. It has a wide range of uses and is not limited by the use occasions.

[0021] According to the above embodiment, a protective cover 9 is provided between the first screw 5 and the second screw 6, and a housing chamber 13 is provided inside the protective cover 9. A diverter groove 11 and an oil collecting groove 12 are provided on the upper and lower sides of the inner wall of the housing chamber 13, respectively. The diverter groove 11 is connected with the oil collecting groove 12, and the oil collecting groove 12 is provided with a plurality of grooves and is vertically arranged in parallel. An oil filling pipe 10 penetrating into the oil collecting groove 12 is provided at the rear end of the protective cover 9. During maintenance, the mechanism is placed horizontally, and lubricating oil is input from the oil filling pipe 10. The lubricating oil is input into the oil collecting groove 12 inside the housing chamber 13 along the oil filling pipe 10, and the lubricating oil flows into the plurality of diverter grooves 11 inside the oil collecting groove 12. As the reduction motor 1 drives the entire mechanism to operate, the first screw 5 and the second screw 6 rotate, which will generate centrifugal force to swing the lubricating oil outward. The lubricating oil flows from the accommodating chamber 13 to the surface of the driven gear 3 and fills the surface of the first screw 5 and the second screw 6. The oil filling pipe 10 injects lubricating oil into the diverter groove 11 and the oil collecting groove 12 respectively, and can automatically apply the lubricating oil to the surface of the screw for lubrication. The lubricating oil prevents the first screw 5, the first threaded tube 7, the second screw 6, and the second threaded tube 8 from wear. The lubricating oil maintains the stability of the first screw 5 driving the first threaded tube 7 and the second screw 6 driving the second threaded tube 8, ensuring a high-precision and symmetrical two-way transmission effect.

Claims

1. A bidirectional telescopic mechanism, comprising a first screw rod (5) and a second screw rod (6), characterized in that: The first screw rod (5) and the second screw rod (6) are arranged in an upper and lower arrangement, the threads on the outer surfaces of the first screw rod (5) and the second screw rod (6) have opposite directions of rotation, the outer surface of the first screw rod (5) is threadedly connected to a first threaded tube (7), the outer surface of the second screw rod (6) is threadedly connected to a second threaded tube (8), the outer surfaces of the first threaded tube (7) and the second threaded tube (8) are both fixed with sliders (15), and the outer surfaces of the sliders (15) are both slidably connected to guide rails (14); A protective cover (9) is arranged between the first screw rod (5) and the second screw rod (6), and an accommodating chamber (13) is provided inside the protective cover (9). A diverter groove (11) and an oil collecting groove (12) are respectively provided on the upper and lower sides of the inner wall of the accommodating chamber (13), and the diverter groove (11) is connected with the oil collecting groove (12). The oil collecting groove (12) is provided with a plurality of grooves which are vertically arranged in parallel, and an oil injection pipe (10) which penetrates into the oil collecting groove (12) is interspersed at the rear end of the protective cover (9).

2. A two-way telescopic mechanism according to claim 1, characterized in that: A driven gear (3) is detachably connected between the first screw rod (5) and the second screw rod (6), and either end of the driven gear (3) is meshingly connected to a driving gear (2).

3. A two-way telescopic mechanism according to claim 2, characterized in that: A driving shaft (16) is fixed at the center of the driving gear (2), and a reduction motor (1) is transmission-connected to the lower end of the driving shaft (16).

4. A two-way telescopic mechanism according to claim 2, characterized in that: The driving gear (2) and the driven gear (3) are located inside the protective cover (9).

5. A two-way telescopic mechanism according to claim 2, characterized in that: A bearing (4) is installed at one end of the first screw rod (5) and the second screw rod (6) close to the driven gear (3).

6. A two-way telescopic mechanism according to claim 1, characterized in that: The length of the first screw rod (5) is equal to the length of the first threaded tube (7), and the length of the second screw rod (6) is equal to the length of the second threaded tube (8).

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