Lifting mechanism based on gear transmission

Abstract

The utility model discloses a lifting mechanism based on gear transmission, which comprises a base, a base frame is arranged at the central position of the top end of the base, vertical plates are fixed at the top end of the base on two sides of the base frame, the two vertical plates are symmetrical about the central line of the base, racks are fixed on the surfaces of the vertical plates, and transmission cases are arranged on the outer sides of the racks. A transverse plate is arranged at the top ends of the two transmission boxes, a bearing seat is arranged at the top end of the transverse plate, clamping mechanisms are arranged on the two sides of the top end of the bearing seat, a worm wheel is arranged on the outer surface of one side of the gear through a guide shaft, and a worm is rotationally installed in the transmission box below the worm wheel. According to the lifting mechanism, gear and rack transmission and worm and gear transmission can be ingeniously combined, the advantages of a traditional gear and rack lifting mechanism are reserved, the performance index of the lifting mechanism is remarkably improved by additionally arranging a worm and gear mechanism, and the lifting mechanism is suitable for various application scenes with high requirements for stability, precision and bearing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering design and manufacturing, in particular to a lifting mechanism based on gear transmission. Background Art

[0002] A lifting mechanism generally refers to a type of mechanism used in a production workshop to lift products or platforms. The reference publication number is CN218579543U, which is a gear-driven lifting mechanism, comprising a lifting group fixing plate, a servo motor is installed on the upper end of the lifting group fixing plate, a reinforcement plate is provided at the connection between the lifting group fixing plate and the servo motor, an active precision bevel gear is fixedly installed on the output end of the servo motor, a driven precision bevel gear is provided on the rear side of the lifting group fixing plate, a first screw rod support seat is provided on the rear side of the lifting group fixing plate, a ball screw is provided at the bottom of the first screw rod support seat, the ball screw comprises a screw sleeve and a screw, the screw A screw fixing plate is fixedly connected to the outer side of the sleeve; a gear-driven lifting mechanism, through the meshing of the active precision bevel gear and the driven precision bevel gear, in cooperation with the ball screw, the slider and the slide rail, makes the lifting mechanism easy to install, with high precision and more durability. According to the above, although the lifting mechanism can be well applied, this type of lifting mechanism is usually mainly composed of a lifting module composed of a ball screw or a trapezoidal screw and a linear guide rail. The mechanism cannot be self-locked in the vertical lifting direction, will rotate under the influence of the gravity of the load, and cannot be accurately positioned; some other traditional tooth-driven lifting mechanisms can only obtain the reduction ratio through the meshing of gears and racks, and the load-bearing capacity is limited. Utility Model Content

[0003] The purpose of the utility model is to provide a lifting mechanism based on gear transmission, which, through optimized design and innovative technical means, aims to achieve higher precision, stronger stability and load-bearing capacity, lower energy consumption and easier maintenance.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting mechanism based on gear transmission, comprising a base, a base frame is arranged at the center position of the top of the base, vertical plates are fixed to the top of the base on both sides of the base frame, the two vertical plates are symmetrical about the center line of the base, racks are fixed to the surfaces of the vertical plates, transmission boxes are arranged on the outer sides of the racks, gears are rotatably installed inside the transmission boxes on one side of the racks, the gears and the racks are meshed with each other, cross plates are arranged on the tops of the two transmission boxes, a bearing seat is arranged on the tops of the cross plates, and clamping mechanisms are arranged on both sides of the tops of the bearing seats.

[0005] Preferably, guide rails are provided on the outer walls on both sides of the base frame, and the guide rails are provided to facilitate placement of the rail seats.

[0006] Preferably, a rail seat is movably connected to the outer wall of one side of the guide rail, and the outer wall of the rail seat is connected to the outer wall of one side of the transmission box. The rail seat is arranged to cooperate with the guide rail to limit the movement range of the transmission box.

[0007] Preferably, a worm wheel is arranged on the outer surface of one side of the gear through a guide shaft, and a worm is rotatably installed inside a transmission box below the worm wheel, so that the gear can be driven to rotate slowly in a self-locking manner through the arrangement of the worm wheel and the worm.

[0008] Preferably, a handwheel is installed on the outer wall of one side of the transmission box, one end of the handwheel extends into the interior of the transmission box and is connected to one end of the worm, and the handwheel is provided so that the worm can be manually controlled to rotate.

[0009] Preferably, a linkage shaft is provided below the transverse plate, both ends of the linkage shaft extend into the interior of the transmission box and are connected to one end of the worm gear, and the two worm gears rotate synchronously through the provision of the linkage shaft.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the lifting mechanism based on gear transmission adopts a composite transmission method. First, the basic linear motion conversion module is composed of gears and racks. The rack is fixed on the vertical plate. By driving the gear to rotate, the support seat can be driven by the rack and the transmission box to realize linear reciprocating motion in the vertical direction. On the basis of the transmission of the original gear and rack, a transmission mechanism of a worm wheel and a worm is added. The worm wheel is connected to the shaft of the gear and rotates synchronously with it. The worm is independently arranged and can be manually driven by a handwheel to adjust the speed and direction of the worm. The transmission mechanism composed of the worm wheel and the worm has a self-locking characteristic, which can improve the stability and safety of the support seat during lifting and lowering, and prevent non-command sliding caused by gravity or other external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0012] Figure 2 This is a side view of the structure of the utility model;

[0013] Figure 3 This is a rear view structural diagram of the utility model;

[0014] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0015] In the figure: 1. base; 2. vertical plate; 3. rack; 4. base frame; 5. guide rail; 6. transmission box; 7. hand wheel; 8. rail seat; 9. linkage shaft; 10. cross plate; 11. bearing seat; 12. clamping mechanism; 13. worm; 14. worm wheel; 15. gear. DETAILED DESCRIPTION

[0016] 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. 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.

[0017] See also Figure 1-4 The utility model provides an embodiment: a lifting mechanism based on gear transmission, comprising a base 1, a base frame 4 is arranged at the center position of the top of the base 1, and guide rails 5 are arranged on the outer walls of both sides of the base frame 4;

[0018] When in use, the guide rail 5 is arranged so as to place the rail seat 8;

[0019] A rail seat 8 is movably connected to the outer wall of one side of the guide rail 5, and the outer wall of the rail seat 8 is connected to the outer wall of one side of the transmission box 6;

[0020] When in use, the rail seat 8 is arranged to cooperate with the guide rail 5 to limit the movement range of the transmission box 6;

[0021] Vertical plates 2 are fixed to the top of the base 1 on both sides of the base frame 4. The two vertical plates 2 are symmetrical about the center line of the base 1. Racks 3 are fixed to the surfaces of the vertical plates 2. Transmission boxes 6 are arranged on the outer sides of the racks 3. Gears 15 are rotatably installed inside the transmission boxes 6 on one side of the racks 3. The gears 15 and the racks 3 are meshed with each other. A worm gear 14 is arranged on the outer surface of one side of the gear 15 through a guide shaft. A worm 13 is rotatably installed inside the transmission box 6 below the worm gear 14.

[0022] When in use, the worm wheel 14 and the worm 13 are arranged so as to self-lock and slowly drive the gear 15 to rotate;

[0023] A hand wheel 7 is installed on the outer wall of one side of the transmission box 6, and one end of the hand wheel 7 extends into the interior of the transmission box 6 and is connected to one end of the worm 13;

[0024] When in use, the hand wheel 7 is set so as to manually control the worm 13 to rotate;

[0025] A linkage shaft 9 is disposed below the horizontal plate 10, and both ends of the linkage shaft 9 extend into the interior of the transmission box 6 and are connected to one end of the worm 13;

[0026] When in use, the linkage shaft 9 is arranged so that the two worms 13 rotate synchronously;

[0027] A transverse plate 10 is disposed at the top of the two transmission boxes 6 , a bearing seat 11 is disposed at the top of the transverse plate 10 , and clamping mechanisms 12 are disposed on both sides of the top of the bearing seat 11 .

[0028] When the embodiment of the present application is in use, a composite transmission method is firstly adopted, in which the gear 15 and the rack 3 constitute a basic linear motion conversion module. By driving the gear 15 to rotate, the support seat 11 can be driven by the rack 3 and the transmission box 6 to realize linear reciprocating motion in the vertical direction. On the basis of the transmission of the original gear 15 and the rack 3, a transmission mechanism of a worm wheel 14 and a worm 13 is added. The worm wheel 14 is connected to the shaft of the gear 15 and rotates synchronously with it. The speed and direction of the worm 13 can be manually driven by the handwheel 7 to adjust the speed. The transmission mechanism composed of the worm wheel 14 and the worm 13 has a self-locking feature, which can improve the stability and safety of the support seat 11 during the lifting and lowering process and prevent non-command sliding caused by gravity or other external forces. In summary: the transmission mechanism of the worm wheel 14 and the worm 13 can provide a larger reduction ratio and a higher transmission accuracy, which effectively improves the positioning accuracy of the entire lifting mechanism. The mechanism has good overload protection capability and load-bearing capacity, so that the lifting mechanism can adapt to a wider range of load requirements while ensuring safety. The smooth transmission performance of the worm wheel 14 and the worm 13 transmission mechanism ensures that the lifting process of the bearing seat 11 is smoother, reduces impact and vibration, and extends the service life of the lifting mechanism. In addition, the transmission mechanism composed of the worm wheel 14 and the worm 13 can accurately adjust the speed and position by electric or manual means, and its own wear is small and the service life is long, which reduces the frequency and cost of daily maintenance and replacement of parts. Therefore, the lifting mechanism can cleverly combine the gear 15 and the rack 3 transmission with the worm wheel 14 and the worm 13 transmission, which not only retains the advantages of the traditional lifting mechanism, but also significantly improves the performance indicators of the lifting mechanism by adding the transmission mechanism of the worm wheel 14 and the worm 13. It is suitable for various application scenarios with high requirements on stability, precision and load-bearing capacity, thereby completing the use of the lifting mechanism.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lifting mechanism based on gear transmission, characterized in that: The invention comprises a base (1), a base frame (4) is arranged at the center position of the top of the base (1), vertical plates (2) are fixed to the top of the base (1) on both sides of the base frame (4), the two vertical plates (2) are symmetrical about the center line of the base (1), the surface of the vertical plates (2) are fixed to racks (3), the outer side of the racks (3) are arranged with transmission boxes (6), the transmission boxes (6) on one side of the racks (3) are rotatably installed with gears (15), the gears (15) and the racks (3) are meshed with each other, the tops of the two transmission boxes (6) are arranged with cross plates (10), the tops of the cross plates (10) are arranged with bearing seats (11), and the two sides of the top of the bearing seats (11) are arranged with clamping mechanisms (12).

2. A lifting mechanism based on gear transmission according to claim 1, characterized in that: Guide rails (5) are provided on the outer walls of both sides of the base frame (4).

3. A lifting mechanism based on gear transmission according to claim 2, characterized in that: A rail seat (8) is movably connected to the outer wall of one side of the guide rail (5), and the outer wall of the rail seat (8) is connected to the outer wall of one side of the transmission box (6).

4. The gear-driven lifting mechanism according to claim 1, characterized in that: A worm wheel (14) is arranged on the outer surface of one side of the gear (15) via a guide shaft, and a worm (13) is rotatably mounted inside a transmission box (6) below the worm wheel (14).

5. The gear-driven lifting mechanism according to claim 4, characterized in that: A hand wheel (7) is mounted on the outer wall of one side of the transmission box (6), and one end of the hand wheel (7) extends into the interior of the transmission box (6) and is connected to one end of the worm (13).

6. The gear-driven lifting mechanism according to claim 4, characterized in that: A linkage shaft (9) is arranged below the transverse plate (10), and both ends of the linkage shaft (9) extend into the interior of the transmission box (6) and are connected to one end of the worm (13).

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