Lifting device with damping mechanism

Abstract

The utility model provides a lifting device with a damping mechanism, and belongs to the technical field of transmission devices. The lifting device with the damping mechanism comprises a shell, a power assembly and a jacking assembly, the power assembly is contained in the shell, the jacking assembly comprises a screw rod, a nut, a connecting terminal and a spring, the power assembly is connected with the screw rod and drives the screw rod to rotate, external threads are arranged on the outer surface of the screw rod, the nut is arranged on the periphery of the screw rod in a sleeved mode, and the connecting terminal is connected with the screw rod. The inner surface of the nut is provided with an internal thread matched with the external thread, the connecting terminal is sleeved on the periphery of the nut, the outer surface of the nut is provided with a first convex ring, the inner surface of the connecting terminal is provided with a second convex ring, and the spring is clamped between the first convex ring and the second convex ring. According to the utility model, the spring is additionally arranged between the connecting terminal and the nut, so that impact energy on the connecting terminal can be converted into elastic potential energy to be consumed, and a protection effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission devices, and particularly relates to a lifting device with a shock absorbing mechanism. Background Art

[0002] Lifting devices are required in applications such as robot vacuums, security cameras, and pan / tilt cameras. These devices require precise control of the position of the components being lifted throughout their travel. In related technologies, these devices are driven by a motor, which uses a screw and nut to convert the motor's rotational motion into linear motion for the connecting terminals. These terminals are directly fixed to the nuts, and when subjected to external forces, the terminals directly transmit the impact load to the nuts, potentially damaging the lifting device.

[0003] Therefore, it is necessary to provide a lifting device with a shock absorbing mechanism to solve the above problems. Utility Model Content

[0004] The utility model provides a lifting device with a shock-absorbing mechanism, in which a spring is added between the connecting terminal and the nut. When subjected to external force, the spring can convert the impact energy on the connecting terminal into elastic potential energy for consumption, and prevent the impact load from being transmitted to the nut, thereby playing a protective role and effectively solving at least one technical problem mentioned in the background technology.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] A lifting device with a shock absorbing mechanism, comprising:

[0007] A shell encloses a receiving space;

[0008] a power assembly housed in the housing space;

[0009] The jacking assembly includes a screw, a nut, a connecting terminal and a spring. The power assembly is connected to the screw to drive the screw to rotate. The outer surface of the screw is provided with an external thread. The nut is sleeved on the periphery of the screw. The inner surface of the nut is provided with an internal thread matching the external thread. The connecting terminal is sleeved on the periphery of the nut. The outer surface of the nut is provided with a first convex ring, and the inner surface of the connecting terminal is provided with a second convex ring. The spring clip is provided between the first convex ring and the second convex ring.

[0010] As a preferred improvement, the shell includes a base, a top cover and a lead cylinder. The base and the top cover cooperate to form the receiving space. The lead cylinder is fixed to the top cover. The lead cylinder is a hollow structure with openings at both ends, and a lead channel is formed inside. The top cover is provided with a perforation at a position corresponding to the lead cylinder, and the perforation connects the receiving space and the lead channel.

[0011] As a preferred improvement, the lead channel serves as the travel space of the connecting terminal, the movement direction of the connecting terminal is the axial direction of the lead channel, the top of the lead channel is open, and the connecting terminal can extend to the outside through the top opening of the lead channel after being lifted.

[0012] As a preferred improvement, a pin ring is further provided on the inner surface of the connecting terminal, and the pin ring is located below the first convex ring and at least partially overlaps with the first convex ring.

[0013] As a preferred improvement, a first lead block is protruding from the outer surface of the connecting terminal, the extension direction of the first lead block is consistent with the movement direction of the connecting terminal, the inner wall of the lead cylinder is recessed to form a first lead groove matching the first lead block, and the first lead block is arranged in the first lead groove.

[0014] As a preferred improvement, a plurality of the first lead blocks are distributed in a ring array along the axis of the connecting terminal, and the first lead grooves are arranged in a one-to-one correspondence with the first lead blocks.

[0015] As a preferred improvement, the inner surface of the second convex ring is protrudingly formed with a second lead block, and the extension direction of the second lead block is consistent with the movement direction of the connecting terminal. The outer surface of the nut is recessed to form a second lead groove matching the second lead block, and the second lead block is arranged in the second lead groove.

[0016] As a preferred improvement, a plurality of the second lead blocks are distributed in a ring array along the axis of the connecting terminal; and the second lead grooves are arranged in a one-to-one correspondence with the second lead blocks.

[0017] As a preferred improvement, the power assembly includes a motor, a worm, a worm wheel and a gear set. The worm is connected to the output shaft of the motor and is driven to rotate by the motor. The worm wheel is engaged with the worm. The gear set includes a small gear and a large gear that are engaged with each other. The small gear is coaxially arranged with the worm wheel and remains fixed. The screw is coaxially arranged with the large gear and remains fixed. The screw passes through the through hole and is suspended in the lead channel.

[0018] As a preferred improvement, the screw has a double-shaft structure, the top end of which is connected to the nut, and the bottom end passes through the large gear and is connected to the magnet. Position sensors are arranged at intervals below the magnet. The magnet and the position sensor together constitute a position feedback mechanism, which detects the linear movement position of the connecting terminal through the rotational position of the screw.

[0019] The beneficial effects of the present invention are:

[0020] (1) A spring is added between the connecting terminal and the nut. When subjected to external force, the spring can convert the impact energy on the connecting terminal into elastic potential energy for consumption, preventing the impact load from being transmitted to the nut, thereby playing a protective role and improving the shock absorption effect of the lifting device;

[0021] (2) Guide structures are provided on both the inner and outer sides of the connecting terminal, which can enhance the guiding effect for the movement of the connecting terminal and make it less likely for the connecting terminal to deviate during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural diagram showing a lifting device with a shock absorbing mechanism provided by the present invention;

[0023] Figure 2 express Figure 1 The exploded structural diagram of the lifting device with a shock absorbing mechanism is shown;

[0024] Figure 3 express Figure 1 A cross-sectional view of the lifting device with a shock absorbing mechanism along line AA is shown;

[0025] Figure 4 express Figure 1 A cross-sectional view of the lifting device with a shock absorbing mechanism along line BB is shown;

[0026] Figure 5 express Figure 1 A half-section view of a lifting device with a shock absorbing mechanism is shown. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Please refer to Figure 1-Figure 5 This embodiment provides a lifting device with a shock absorbing mechanism, including a shell 10, a power assembly 20 and a lifting assembly 30.

[0029] The shell 10 includes a base 11, a top cover 12 and a lead cylinder 13. The base 11 and the top cover 12 cooperate to form a receiving space 14. The lead cylinder 13 is fixed to the top cover 12. The lead cylinder 13 is a hollow structure with openings at both ends, and a lead channel 130 is formed inside. The top cover 12 is provided with a through hole 120 at a position corresponding to the lead cylinder 13. The through hole 120 connects the receiving space 14 and the lead channel 130.

[0030] The power assembly 20 is used to drive the lifting assembly 30 to move. The power assembly 20 includes a motor 21 , a worm 22 , a worm wheel 23 and a gear set 24 .

[0031] The worm 22 is connected to the output shaft of the motor 21 and is driven to rotate by the motor 21. The worm wheel 23 is engaged with the worm 22 to change the transmission direction of the driving force. Specifically, the axis of the worm 22 is perpendicular to the axis of the worm wheel 23. The axis of the worm 22 is set in the horizontal direction, and the axis of the worm wheel 23 is set in the vertical direction, so that the arrangement direction of the motor 21 can be different from the arrangement direction of the jacking assembly 30, thereby making full use of the space in different directions to meet the development needs of miniaturization of lifting devices.

[0032] The gear set 24 includes a small gear 241 and a large gear 242 that mesh with each other. The small gear 241 and the worm gear 23 are coaxially arranged and kept fixed, and the movement states of the two are consistent.

[0033] The lifting assembly 30 includes a screw 31 , a nut 32 , a connecting terminal 33 and a spring 34 .

[0034] The screw 31 is coaxially arranged and fixed with the large gear 242, and their motion states are consistent. The power assembly 20 is housed in the housing space 14, and the screw 31 passes through the through-hole 120 and is suspended in the lead channel 130. The outer surface of the screw 31 is provided with an external thread, and the nut 32 is sleeved on the outer periphery of the screw 31. The inner surface of the nut 32 is provided with an internal thread that matches the external thread. The rotation of the screw 31 drives the nut 32 to move linearly along the axis of the screw 31. The cooperation between the screw 31 and the nut 32 converts the rotational motion into linear motion, thereby achieving a lifting operation.

[0035] The connecting terminal 33 is sleeved around the nut 32 and is used to connect to an external component that needs to be lifted. The lead channel 130 provides travel space for the connecting terminal 33. The direction of movement of the connecting terminal 33 is along the axis of the lead channel 130. The top of the lead channel 130 is open, and after being lifted, the connecting terminal 33 can extend through the top opening of the lead channel 130 to the outside.

[0036] The outer surface of the nut 32 is provided with a first protruding ring 321, and the inner surface of the connecting terminal 33 is provided with a second protruding ring 331. The spring 34 is sandwiched between the first protruding ring 321 and the second protruding ring 331. The first protruding ring 331 is located in the middle of the nut 32 in the axial direction and is spaced apart from the large gear 242.

[0037] When the impact load on the connecting terminal 33 is large, the connecting terminal 33 moves downward, squeezing the spring 34. The spring 34 is deformed by the force, converting the impact energy into elastic potential energy for consumption, thereby preventing the impact force from directly acting on the nut 32 and causing damage to the jacking assembly 30 and the power assembly 20. When the impact load disappears, the spring 34 can be reset to its initial state under the action of the elastic potential energy, thereby realizing the self-reset of the jacking device. It should be noted that the spring 34 needs to be prestressed, and the size of the prestress is selected according to actual needs.

[0038] The inner surface of the connecting terminal 33 is further provided with a pin ring 332, which is located below the first protruding ring 321 and at least partially overlaps the first protruding ring 321. The elastic action of the spring 34 applies an upward force to the connecting terminal 33, causing the pin ring 332 to abut against the first protruding ring 321. When the nut 32 moves upward under the drive of the screw 31, the connecting terminal 33 moves upward synchronously, achieving jacking. When the nut 32 moves downward under the drive of the screw 31, the connecting terminal 33 moves downward under the action of gravity.

[0039] Furthermore, to ensure the stability of the movement of the connecting terminal 33, lead structures are provided between the connecting terminal 33 and the nut 32, and between the connecting terminal 33 and the lead cylinder 13. Specifically, a first lead block 333 protrudes from the outer surface of the connecting terminal 33, and a second lead block 334 protrudes from the inner surface of the second protruding ring 331. The first lead block 333 and the second lead block 334 extend in the same direction as the movement direction of the connecting terminal 33. Multiple first lead blocks 333 are distributed in a circular array along the axis of the connecting terminal 33, and multiple second lead blocks 334 are distributed in a circular array along the axis of the connecting terminal 33.

[0040] The inner wall of the lead cylinder 13 is recessed to form a first lead groove 131 that matches the first lead block 333. The first lead block 333 is disposed within the first lead groove 131. The outer surface of the nut 32 is recessed to form a second lead groove 322 that matches the second lead block 334. The second lead block 334 is disposed within the second lead groove 322. The first lead blocks 333 are disposed in a one-to-one correspondence with the first lead groove 131, and the second lead blocks 334 are disposed in a one-to-one correspondence with the second lead groove 322.

[0041] By cooperating with the two sets of lead blocks and the lead grooves, both the inner and outer sides of the connecting terminal 33 can be limited and guided, so that the movement direction of the connecting terminal 33 remains unique and avoids deviation.

[0042] Furthermore, the screw 31 is a double-shaft structure, the top end of which is connected to the nut 32, and the bottom end passes through the large gear 242 and is connected to the magnet 41. A position sensor 42 is arranged at intervals below the magnet 41. The magnet 41 and the position sensor 42 together constitute a position feedback mechanism, which detects the linear movement position of the connecting terminal 33 through the rotational position of the screw 31.

[0043] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A lifting device with a shock absorbing mechanism, characterized in that: include: A shell encloses a receiving space; a power assembly housed in the housing space; The jacking assembly includes a screw, a nut, a connecting terminal and a spring. The power assembly is connected to the screw to drive the screw to rotate. The outer surface of the screw is provided with an external thread. The nut is sleeved on the periphery of the screw. The inner surface of the nut is provided with an internal thread matching the external thread. The connecting terminal is sleeved on the periphery of the nut. The outer surface of the nut is provided with a first convex ring, and the inner surface of the connecting terminal is provided with a second convex ring. The spring clip is provided between the first convex ring and the second convex ring.

2. The lifting device with a shock absorbing mechanism according to claim 1, characterized in that: The shell includes a base, a top cover and a lead cylinder. The base and the top cover cooperate to form the receiving space. The lead cylinder is fixed to the top cover. The lead cylinder is a hollow structure with openings at both ends and a lead channel formed inside. The top cover is provided with a through hole at a position corresponding to the lead cylinder, and the through hole connects the receiving space and the lead channel.

3. The lifting device with a shock absorbing mechanism according to claim 2, characterized in that: The lead channel serves as a travel space for the connecting terminal. The movement direction of the connecting terminal is the axial direction of the lead channel. The top of the lead channel is open. After being lifted, the connecting terminal can extend to the outside through the top opening of the lead channel.

4. The lifting device with a shock absorbing mechanism according to claim 1, characterized in that: The inner surface of the connecting terminal is further provided with a pin ring, which is located below the first convex ring and at least partially overlaps with the first convex ring.

5. The lifting device with a shock absorbing mechanism according to claim 2, characterized in that: A first lead block is protruding from the outer surface of the connecting terminal, and the extension direction of the first lead block is consistent with the movement direction of the connecting terminal. The inner wall of the lead cylinder is recessed to form a first lead groove matching the first lead block, and the first lead block is arranged in the first lead groove.

6. The lifting device with a shock absorbing mechanism according to claim 5, characterized in that: The plurality of first lead blocks are distributed in a ring array along the axis of the connecting terminal, and the first lead grooves are arranged in a one-to-one correspondence with the first lead blocks.

7. The lifting device with a shock absorbing mechanism according to claim 2, characterized in that: A second lead block is protruding from the inner surface of the second convex ring, and the extension direction of the second lead block is consistent with the movement direction of the connecting terminal. A second lead groove matching the second lead block is recessed on the outer surface of the nut, and the second lead block is arranged in the second lead groove.

8. The lifting device with a shock absorbing mechanism according to claim 7, characterized in that: A plurality of the second lead blocks are distributed in a ring array along the axis of the connecting terminal; and the second lead grooves are arranged in a one-to-one correspondence with the second lead blocks.

9. The lifting device with a shock absorbing mechanism according to claim 2, characterized in that: The power assembly includes a motor, a worm, a worm wheel and a gear set. The worm is connected to the output shaft of the motor and is driven to rotate by the motor. The worm wheel is engaged with the worm. The gear set includes a pinion and a gear that are engaged with each other. The pinion is coaxially arranged with the worm wheel and remains fixed. The screw is coaxially arranged with the gear wheel and remains fixed. The screw passes through the through hole and is suspended in the lead channel.

10. The lifting device with a shock absorbing mechanism according to claim 9, characterized in that: The screw has a double-shaft structure, the top end of which is connected to the nut, and the bottom end passes through the large gear and is connected to the magnet. A position sensor is arranged at intervals below the magnet. The magnet and the position sensor together constitute a position feedback mechanism, which detects the linear movement position of the connecting terminal through the rotational position of the screw.

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