A fixing structure of a lifting drive device

Abstract

The present invention discloses a fixed structure of a lifting drive device, including a box body, a motor, a lifting assembly, a bearing seat and a pressure plate. The box body includes a accommodating cavity, the motor is located in the accommodating cavity, the motor includes a main body and a gear box, the gear box is located at the end of the main body and is configured to be connected to a transmission rod; the lifting assembly is arranged on the box body and is driven to lift and lower by the motor, the lifting assembly includes a transmission rod, and the transmission rod is rotatably arranged on the box body; the bearing seat is arranged in the accommodating cavity and fixedly connected to the box body, and the bearing seat is configured to be installed on a rotating bearing sleeved on the transmission rod; the bearing seat is provided with two connecting columns that are symmetrical and vertically protrude upward from the bearing seat; the middle part of the pressure plate presses down the gear box of the motor, and the two ends of the pressure plate are fixedly connected to the connecting column; a connecting ear extends to the side of the pressure plate, and a retaining frame is fixedly installed on the connecting ear, and the retaining frame is sleeved on the main body of the motor; shock absorption and noise reduction are achieved through more accurate motor connection and installation.

Description

Technical Field

[0001] The present invention relates to the field of lifting devices, in particular to the field of lifting tables, and more particularly to a fixing structure of a lifting drive device. Background Art

[0002] For a dual-motor lift table, the motor is loaded in the motor box, and a pressure plate is often used to press the gearbox housing of the motor to prevent upward axial movement during operation. In the past, the pressure plate was directly fixed to the side panel of the motor box, or directly fixed to the bottom plate of the motor box, which caused the following two problems: first, the screws can be seen on the outside of the motor box, affecting the overall appearance of the lift table; second, the vibration or noise of the motor is directly transmitted to the motor box body, making the vibration and noise more obvious. There is a high possibility that the vibration or noise of the motor will form resonance after being transmitted to the motor box body, or generate greater noise to the outside, affecting the comfort of use of the product.

[0003] Furthermore, if the pressure plate is directly fixed to the motor box body, the connection and positioning of the motor gearbox will be affected by multiple parts; if there is an error in the connection between the bearing seat and the box body, and there is an error in the connection between the pressure plate and the box body, there will be a cumulative error between the three parts, which will have a greater adverse effect on the connection and positioning of the motor gearbox, and will also cause the pressure plate to press the motor gearbox too tightly or too loosely, and the tightness is difficult to control; in use, if the pressure plate presses the motor gearbox too tightly, it will cause the motor operating current to increase, the transmission relationship to be not smooth, the power consumption to increase, and the noise to increase; if it is too loose, when the motor is reversing or when it is subjected to greater resistance, it will produce upward axial movement, causing the table to shake and vibrate, affecting the user experience of the lifting table.

[0004] The Chinese utility model patent with patent number CN201620955224.2 provides a leg for a lifting table, which relates to the technical field of lifting tables; its column bottom box is arranged above the column, and an electric motor is installed in the column bottom box, the electric motor is supported by a rubber support seat, an electric motor pressing plate is provided above the electric motor, and the electric motor pressing plate is fixed to the column bottom box by flat-bottom screws, a rubber flat pad is provided between the electric motor and the electric motor pressing plate, the inner tube pressing plate is provided below the electric motor and the electric motor pressing plate, the inner tube pressing plate is provided at the top of the column, an inner tube is provided in the column, the inner tube is connected to the electric motor, the motor wire is clamped on the rubber support seat and the column bottom box, the bottom box cover is buckled on the column bottom box, and the anti-vibration gasket is pasted between the column bottom box and the electric motor. In this utility model, the electric motor pressing plate is connected to the column bottom box, that is, the pressure plate is connected to the motor box. The electric motor pressing plate presses the shaft end of the motor but it is difficult to control the tightness, and the motor is prone to vibration and noise; the main body of the motor has a high degree of freedom and is also prone to shaking.

[0005] Chinese invention patent publication number CN101710752B discloses a drive device for an electric lift column, comprising a motor housing and a motor. The motor drives a transmission mechanism that drives the lift column to move upward and downward. The motor housing comprises a base box and a base plate. The base box is provided with a tail pad and at least two mutually parallel support blocks. The support blocks are shorter than the motor and are sleeved with elastic support block sleeves. The tail end of the motor is embedded in the tail pad, and the motor is sandwiched between the elastic support block sleeves on both sides. The base plate is sealed and connected to the base box to secure the motor. The elastic support block sleeves are made of rubber. The transmission mechanism comprises a worm gear, a worm gear connector, and a drive rod joint, which are connected in sequence. The motor output shaft drives the worm gear, which in turn drives the worm gear connector and the drive rod joint. The drive rod joint drives the drive rod in the lift column. While the elastic support block sleeves can reduce motor vibration to a certain extent, the support blocks are fixed to the base box, and the vibration and noise generated by the motor are directly transmitted to the base box. The vibration and noise emitted by the motor box are more easily felt by the user, resulting in poor user comfort. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a fixed structure of a lifting drive device, in which the pressure plate used to press the gear box is not directly connected to the box body, but is fixedly connected to the bearing seat, and a connecting ear extends from the pressure plate to install the retaining frame. The main body of the motor and the gear box are both connected to the pressure plate and are not directly connected to the box body; this is conducive to the connection and positioning of the motor, thereby reducing vibration and noise.

[0007] The technical solution of the present invention is achieved as follows:

[0008] A fixing structure of a lifting drive device, comprising:

[0009] The box body includes a receiving cavity;

[0010] The motor is located in the accommodating cavity of the box body, and the motor includes a main body and a gear box. The gear box is located at an end of the main body and is configured to be in transmission connection with a transmission rod;

[0011] A lifting assembly is provided on the box body and is driven to move up and down by a motor; the lifting assembly includes a transmission rod, which is rotatably provided on the box body;

[0012] A bearing seat is disposed in the accommodating cavity and fixedly connected to the box body, and the bearing seat is configured to mount a rotating bearing sleeved on the transmission rod; the bearing seat is provided with two centrally symmetrical connecting columns that protrude vertically upward from the bearing seat;

[0013] The middle part of the pressure plate presses down the gear box of the motor, and the two ends of the pressure plate are fixedly connected to the connecting columns; the pressure plate has connecting ears extending to the side, and a retaining frame is fixedly installed on the connecting ears, and the retaining frame is sleeved on the main body of the motor.

[0014] The motor is arranged in the accommodating cavity of the box body by means of a pressure plate; the gear box of the motor is pressed by the pressure plate, and the main body of the motor is arranged on the connecting ear through a retaining frame, that is, the entire motor is connected and positioned by means of a pressure plate, and the pressure plate is fixedly connected to the bearing seat. The box body does not play the role of connecting or positioning the motor in this solution, so it only creates a connection relationship between the pressure plate and the bearing seat, avoiding the generation of cumulative errors, which is beneficial to the connection and positioning of the motor. By connecting and installing the motor more accurately and more matching, the motor can work normally and stably, and will not produce any movement, thereby achieving shock absorption and noise reduction.

[0015] There is no direct connection between the pressure plate and the box body, so the distance for vibration or noise transmission is lengthened, and part of the energy of the vibration or noise is dissipated due to conduction. Moreover, the pressure plate is directly connected to the bearing seat, so most of the vibration and noise of the pressure plate are transmitted to the stable lifting assembly through the bearing seat. This part of energy does not cause the lifting assembly to vibrate or make noise, and the vibration or noise actually transmitted to the box body is greatly reduced, thereby achieving shock absorption and noise reduction.

[0016] Preferably, a gap is provided between the retaining frame and the bottom surface of the accommodating cavity, and the retaining frame is disposed in a suspended state within the accommodating cavity of the housing. The retaining frame serves to limit the rotation of the motor and maintain its stability. The retaining frame also keeps the main body of the motor suspended and out of contact with the housing. Normal vibrations of the main body of the motor are not transmitted directly to the housing, but are instead transmitted to the bearing seat via the retaining frame and the pressure plate, thereby significantly reducing the vibrations transmitted to the housing.

[0017] Preferably, the connecting ear includes an extension portion and a plug portion. The extension portion is vertically arranged and extends laterally from the pressure plate. The two ends of the extension portion are fixedly connected to the pressure plate and the plug portion, respectively. The plug portion is roughly C-shaped and includes two plug plates spaced vertically and arranged horizontally. Correspondingly, the retaining frame has a slot. After the plug portion is inserted into the slot, the retaining frame and the two plug plates are fixedly connected by two vertical screws. The connecting ear and the retaining frame are plugged into each other and connected by screws.

[0018] Preferably, the retaining frame includes a shock-absorbing sleeve and a connecting portion, the shock-absorbing sleeve is annular and the cross-sectional shape of the shock-absorbing sleeve is the same as the cross-sectional shape of the main body of the motor; the connecting portion is fixedly connected to the side of the shock-absorbing sleeve and the connecting ear is inserted in the connecting portion.

[0019] Preferably, the retainer is made of rubber material, so that the retainer has a shock-absorbing effect.

[0020] Preferably, the pressure plate is roughly in an inverted U shape, comprising a horizontal plate and vertical plates located on both sides of the horizontal plate. The middle part of the horizontal plate abuts against the gear box and presses down the gear box. Two fixing ears extend from the lower end of the vertical plate, and the fixing ears are fixedly connected to the connecting column by screws; the connecting ears are formed by extending sideways from the vertical plate close to the main body.

[0021] Preferably, the housing includes a bottom plate with a boss protruding from the bottom plate; the bearing seat further includes two centrally symmetrical mounting platforms that protrude vertically upward from the bearing seat. The mounting platforms are hollowed below to form mounting slots, into which the bosses fit, and the mounting platforms and bosses are fixedly connected by screws. Thus, the connection point between the bearing seat and the housing is located above the bottom plate of the housing, that is, within the accommodating cavity. Even if the motor generates noise, most of the noise will be transmitted downward to the lifting assembly and absorbed, while only a small portion will be transmitted to the housing.

[0022] Preferably, the height of the connecting column is greater than the height of the mounting platform, so as to facilitate the connection and fixation of the pressing plate and at the same time make the connection point between the pressing plate and the bearing seat as far away from the box body as possible, so that the vibration or noise generated by the pressing plate is weakened by conduction and only a small part is transmitted to the box body.

[0023] Preferably, a rubber gasket is provided between the pressure plate and the gear box. The pressure plate presses the gear box, and a rubber gasket is provided at the contact point between the two to increase dynamic buffering. When the vibration of the motor itself is transmitted to the pressure plate, it will be further weakened by the rubber gasket.

[0024] Preferably, it further includes a cover plate, which includes a buckle arranged downward; the box body includes end plates at left and right ends, each end plate is provided with a slot, and the cover plate is installed above the box body and is engaged with the slot through the buckle.

[0025] The design starting point, concept and beneficial effects of the present invention using the above technical solution are:

[0026] 1. In terms of the connection and positioning of the motor: the motor is arranged in the accommodating cavity of the box body by means of a pressure plate. The pressure plate can not only press the gear box of the motor, but also make the main body of the motor hollow through the connecting ear and the retaining frame; the gear box of the motor is pressed by the pressure plate, and the main body of the motor is set on the connecting ear through the retaining frame, that is, the entire motor relies on the pressure plate for connection and positioning, and the pressure plate is fixedly connected to the bearing seat. The box body does not play the role of connecting or positioning the motor in this solution, so it only creates a connection relationship between the pressure plate and the bearing seat, avoiding the generation of cumulative errors, which is beneficial to the connection and positioning of the motor. By connecting and installing the motor more accurately and matching it, the motor can work normally and stably, and will not produce any movement, thereby achieving vibration reduction and noise reduction.

[0027] 2. From the connection position of the pressure plate: there is no direct connection between the pressure plate and the box body, the distance of vibration or noise transmission is lengthened, and part of the energy of vibration or noise is dissipated due to conduction. Moreover, the pressure plate is directly connected to the bearing seat. Most of the vibration and noise of the pressure plate are transmitted to the stable lifting assembly through the bearing seat. This part of energy does not cause the lifting assembly to vibrate or make noise. The vibration or noise actually transmitted to the box body is greatly reduced, thereby achieving shock absorption and noise reduction.

[0028] 3. The pressure plate is connected to the connecting column on the bearing seat to keep the bearing seat smaller in size, prevent the connecting plate from being too large and causing swinging or shaking, make the connection more stable, and prevent the bearing seat itself from vibrating easily; at the same time, it can also reduce the cost of the bearing seat.

[0029] 4. The function of the retainer is to limit the rotation of the motor, keep it in a stable state, and provide a certain degree of shock absorption for the motor; the retainer keeps the main body of the motor in an empty state and does not contact the box body. When normal vibration occurs in the main body of the motor, it will not be directly transmitted to the box body, but will be transmitted to the bearing seat through the retainer and the pressure plate, and finally the vibration transmitted to the box body will be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the three-dimensional structure of the box body provided on the lifting table legs in the embodiment of the present invention Figure 1 ;

[0031] Figure 2 Schematic diagram of the three-dimensional structure of the box body provided on the lifting table legs in the embodiment of the present invention Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection of various components inside the box body in an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the three-dimensional structure of the bearing seat in the embodiment of the present invention Figure 1 ;

[0034] Figure 5 Schematic diagram of the three-dimensional structure of the bearing seat in the embodiment of the present invention Figure 2 ;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of the bearing seat installed on the box body in an embodiment of the present invention;

[0036] Figure 7 Schematic diagram of the three-dimensional structure of the pressing plate and the connecting ear in an embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the three-dimensional structure of the retainer in an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of a three-dimensional structure in which a motor is inserted into a retaining frame and positioned relative to a pressure plate in an embodiment of the present invention;

[0039] Figure 10 Schematic diagram of the three-dimensional structure of the motor in an embodiment of the present invention;

[0040] Figure 11This is a cross-sectional view of the lifting table legs and the box body in an embodiment of the present invention;

[0041] Figure 12 This is a schematic diagram of the three-dimensional structure in which the pressure plate is directly connected to the bearing seat in an embodiment of the present invention.

[0042] The figures are marked as follows: box body 1; bottom plate 101; end plate 102; side plate 103; connecting hole 104; motor 2; main body 201; gear box 202; lifting assembly 3; bearing seat 4; connecting plate 401; mounting portion 402; accommodating portion 403; pressing plate 5; horizontal plate 501; vertical plate 502; fixing ear 503; accommodating chamber 6; rotating bearing 7; connecting column 8; connecting ear 9; extension portion 901; plug-in portion 902; plug-in plate 903; retaining frame 10; shock-absorbing sleeve 1001; connecting portion 1002; slot 1003; lifting table leg 12; reinforcing rib 13; boss 14; positioning hole 15; rubber gasket 16; boss 17; mounting platform 18; mounting groove 19; cover plate 20; buckle 21; slot 22. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0045] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] The specific implementation of the present invention is as follows:

[0047] Lifting drive devices are now often used in furniture, such as dual-motor lifting tables. A motor box is set above the lifting table legs 12 of the lifting table, and the motor 2 is set in the motor box. The table legs are provided with a lifting component 3, which is a lifting push rod, that is, a lifting push rod. When the lifting table is lifted, the motor 2 will generate vibration and noise. Since the traditional fixed structure is to place the motor 2 in the motor box, the shaft end of the motor 2 is pressed by a pressure plate, and the pressure plate is connected to the side plate 103 or the bottom plate 101 of the motor box. Therefore, on the one hand, the vibration of the motor 2 itself is directly transmitted to the motor box, and on the other hand, the vibration of the shaft end of the motor 2 is transmitted to the motor box through the pressure plate. The shaft end of the motor 2 is the connection between it and the lifting component 3, which is more prone to vibration. Errors in the connection and positioning of the motor 2 will also aggravate vibration and noise. The lifting component 3 is firmly and vertically connected, and it takes a lot of energy to make it vibrate or make noise. Therefore, it is possible to consider transmitting the vibration generated by the motor 2 to the lifting component 3 or the lifting table leg 12.

[0048] like Figure 1-3 As shown in Figure 12, the present invention provides a fixed structure of a lifting drive device, including a box body 1, a motor 2, a lifting assembly 3, a bearing seat 4 and a pressure plate 5. The box body 1 includes a accommodating cavity 6, and the motor 2 is located in the accommodating cavity 6. The motor 2 includes a main body 201 and a gear box 202. The gear box 202 is located at the end of the main body 201 and is configured to be connected to a transmission rod (not shown in the figure); the lifting assembly 3 is arranged on the box body 1 and is driven to rise and fall by the motor 2. The lifting assembly 3 includes a transmission rod, and the transmission rod is rotated. On the box body 1; the bearing seat 4 is arranged in the accommodating cavity 6 and is fixedly connected to the box body 1, and the bearing seat 4 is configured to install a rotating bearing 7 sleeved on the transmission rod; the bearing seat 4 is provided with two connecting columns 8 that are centrally symmetrical and vertically protrude upward from the bearing seat 4; the middle part of the pressure plate 5 presses down on the gear box 202 of the motor 2, and the two ends of the pressure plate 5 are fixedly connected to the connecting columns 8; a connecting ear 9 extends to the side of the pressure plate 5, and a retaining frame 10 is fixedly installed on the connecting ear 9, and the retaining frame 10 is sleeved on the main body 201 of the motor 2.

[0049] The fixed structure of the lifting drive device is applied to the lifting table. The box body 1 is the box body 1 of the motor box, the gear box 202 is the shaft end of the motor 2, and the worm gear is built in. The lifting component 3 is the lifting push rod, the lifting push rod is arranged in the lifting table leg 12, and the transmission rod is the screw rod in the lifting push rod.

[0050] Specifically, if Figure 4-6As shown, the box body 1 includes a bottom plate 101, vertical end plates 102 located on the left and right sides of the bottom plate 101, and vertical side plates 103 located on the front and back sides of the bottom plate 101. The accommodating cavity 6 is formed between the bottom plate 101, the end plates 102 and the side plates 103; a connecting hole 104 for transmission connection between the power supply machine 2 and the lifting assembly 3 is opened on the bottom plate 101, and the bearing seat 4 is set therein; the rotating bearing 7 is installed in the bearing seat 4, and the upper end of the transmission rod is inserted into the rotating bearing 7 and protrudes from the rotating bearing 7 to be transmission-connected to the motor 2; the bearing seat 4 is arranged from top to bottom The lower part includes a connecting plate 401, a mounting portion 402 and a receiving portion 403 in sequence. The bearing seat 4 is installed in the connecting hole 104 from top to bottom. The connecting plate 401 is located in the receiving cavity 6 above the base plate 101, the mounting portion 402 is placed in the connecting hole 104, and the receiving portion 403 is located below the base plate 101; the connecting hole 104 is roughly square, and the shape of the mounting portion 402 matches it. The rotating bearing 7 is arranged in the receiving portion 403, the connecting column 8 is vertically arranged on the connecting plate 401, and a reinforcing rib 13 is also provided between the connecting column 8 and the connecting plate 401.

[0051] like Figure 3 、 7 As shown in Figure 10, the pressure plate 5 is roughly in an inverted U shape, which includes a horizontal plate 501 and vertical plates 502 located on both sides of the horizontal plate 501. The middle part of the horizontal plate 501 abuts against the gear box 202 and presses down the gear box 202. Specifically, a convex seat 14 is protruding upward on the upper surface of the gear box 202. Correspondingly, a positioning hole 15 for accommodating the convex seat 14 is opened in the middle part of the horizontal plate 501. A rubber gasket 16 is also provided on the outside of the convex seat 14. When the horizontal plate 501 abuts against the gear box 202, the rubber gasket 16 is located between the convex seat 14 and the positioning hole 15; two fixing ears 503 extend from the lower end of the vertical plate 502. The fixing ears 503 are arranged horizontally and are connected to the connecting The connecting column 8 is fixedly connected by screws; the connecting column 8 lifts the pressure plate 5 and moves it away from the box body 1, so that the vibration energy transmitted by the pressure plate 5 is as far away from the box body 1 as possible, thereby reducing the vibration emitted by the box body 1 to the outside; there is no direct connection between the pressure plate 5 and the box body 1, the distance of vibration or noise transmission is lengthened, and part of the energy of the vibration or noise is dissipated due to conduction, and the pressure plate 5 is directly connected to the bearing seat 4. Most of the vibration and noise of the pressure plate 5 are transmitted to the stable lifting component 3 through the bearing seat 4. This part of energy does not cause the lifting component 3 to vibrate or make noise. The vibration or noise actually transmitted to the box body 1 is greatly reduced, thereby achieving shock absorption and noise reduction.

[0052] like Figure 7-9As shown, the connecting ear 9 is formed by extending the vertical plate 502 of the main body 201 close to the motor 2 to the side, and the connecting ear 9 includes an extension portion 901 and a plug-in portion 902. The extension portion 901 is a vertical plate-shaped body and is extended to the side by the vertical plate 502 of the pressure plate 5. The extension portion 901 is bent due to the arrangement of the main body 201 and the gear box 202 in the motor 2. The two ends of the extension portion 901 are fixedly connected to the vertical plate 502 and the plug-in portion 902 respectively; the retaining frame 10 includes a shock-absorbing sleeve 1001 and a connecting portion Part 1002, the plug-in portion 902 is roughly C-shaped, which includes two plug-in boards 903 spaced apart and horizontally arranged above and below. Correspondingly, a C-shaped slot 1003 is provided on the connecting portion 1002 of the retaining frame 10. After the plug-in portion 902 is inserted into the slot 1003, the two plug-in boards 903 are fixedly connected to the connecting portion 1002 of the retaining frame 10 by two vertically arranged screws; the horizontal plate 501, the vertical plate 502 of the pressure plate 5 and the extension portion 901 and the plug-in portion 902 of the connecting ear 9 are all integrally formed.

[0053] like Figure 8 、 9 As shown, the shock-absorbing sleeve 1001 is annular and the cross-sectional shape of the shock-absorbing sleeve 1001 is the same as the cross-sectional shape of the main body 201 of the motor 2, the connecting portion 1002 is fixedly connected to the side of the shock-absorbing sleeve 1001 and the connecting ear 9 is inserted into the connecting portion 1002; after the shock-absorbing sleeve 1001 is sleeved on the main body 201, since the connecting portion 1002 is fixedly connected to the connecting ear 9, it can limit the rotation of the motor 2 and keep the motor 2 stable; the connecting portion 1002 and the shock-absorbing sleeve 1001 are integrally formed and are both made of rubber material. While maintaining the normal operation of the motor 2, they can also provide a certain amount of shock absorption and buffering to slow down the vibration generated by the main body 201 itself; further, the connecting ear 9 is hollowed out It is placed in the accommodating cavity 6, and the retaining frame 10 connected thereto is also hollowed out and set in the accommodating cavity 6 of the box body 1. There is a gap between the retaining frame 10 and the bottom surface of the accommodating cavity 6, and the main body 201 inserted in the retaining frame 10 is also hollowed out and set in the accommodating cavity 6. There is a gap between the main body 201 of the motor 2 and the bottom plate 101 of the box body 1; the main body 201 of the motor 2 does not contact the bottom plate 101, and in other directions, the main body 201 of the motor 2 does not contact the side plate 103 or the end plate 102, so that the vibration generated on the main body 201 will not be directly transmitted to the box body 1, and the box body 1 will not produce the effect of amplifying vibration or noise, which is beneficial to the overall vibration reduction and noise reduction.

[0054] The gear box 202 of the motor 2 is pressed by the pressure plate 5, and the main body 201 of the motor 2 is set on the connecting ear 9 through the retaining frame 10, that is, the entire motor 2 relies on the pressure plate 5 to be connected and positioned, and the pressure plate 5 is fixedly connected to the bearing seat 4. The box body 1 does not play the role of connecting or positioning the motor 2 in this solution, so it only creates a connection relationship between the pressure plate 5 and the bearing seat 4, avoiding the generation of cumulative errors, which is beneficial to the connection and positioning of the motor 2. By connecting and installing the motor 2 more accurately and more matching, the motor 2 can work normally and stably, and will not produce any movement, thereby achieving shock absorption and noise reduction.

[0055] In addition, if Figure 11 As shown, a boss 17 is convexly provided on the bottom plate 101 of the box body 1, and two mounting platforms 18 that are symmetrical in center and vertically protrude upward from the upper surface of the connecting plate 401 are provided on the connecting plate 401 of the bearing seat 4. A mounting groove 19 for accommodating the boss 17 is formed in the hollow below the mounting platform 18. When the bearing seat 4 is installed on the box body 1, the boss 17 enters the mounting groove 19 and the mounting platform 18 and the boss 17 are fixedly connected by screws; the height of the connecting column 8 is greater than the height of the mounting platform 18. The higher height of the connecting column 8 is to facilitate the installation of the pressure plate 5, and the pressure plate 5 and the connecting plate 5 are connected. The screws of the column 8 do not need to be connected to the bottom plate 101 of the box body 1, and secondly, this is to keep the pressure plate 5 away from the box body 1; the reason why the bearing seat 4 and the box body 1 are connected through the mounting platform 18 and the boss 17 instead of being directly locked with screws is to make the connection position of the bearing seat 4 and the mounting platform 18 in the accommodating cavity 6 above the bottom plate 101. If vibration and noise occur, they can be transmitted downward through the cavity to the lifting table leg 12 or the lifting component 3, thereby reducing the sensitivity of vibration; looking from the bottom up, the screw hole opened by the boss 17 on the bottom plate 101 is blocked by the lifting table leg 12.

[0056] like Figure 1 、 2 As shown, a cover plate 20 is provided on the box body 1, and the cover plate 20 includes a downwardly arranged snap button 21; a slot 22 is provided on the end plate 102 of the box body 1, and the cover plate 20 is installed above the box body 1 and is engaged with the slot 22 through the snap button 21. The cover plate 20 closes the motor 2, the pressure plate 5, and the bearing seat 4 in the accommodating groove.

[0057] The description of this embodiment focuses on the structure inside the box body 1, rather than the structure and operation of the lifting drive device. The structure of the lifting table, the structure of the lifting table legs 12, the structure of the lifting assembly 3 and their movement process are not repeated here.

Claims

1. A fixing structure of a lifting drive device, characterized in that: include: The box body includes a receiving cavity; The motor is located in the accommodating cavity of the box body, and the motor includes a main body and a gear box. The gear box is located at an end of the main body and is configured to be in transmission connection with a transmission rod; A lifting assembly is provided on the box body and is driven to move up and down by a motor; the lifting assembly includes a transmission rod, which is rotatably provided on the box body; A bearing seat is disposed in the accommodating cavity and fixedly connected to the box body, and the bearing seat is configured to mount a rotating bearing sleeved on the transmission rod; the bearing seat is provided with two centrally symmetrical connecting columns that protrude vertically upward from the bearing seat; The pressure plate has a middle portion that presses down the gear box of the motor, and both ends of the pressure plate are fixedly connected to the connecting columns; a connecting ear extends sideways from the pressure plate, and a retaining frame is fixedly mounted on the connecting ear, and the retaining frame is sleeved on the main body of the motor; there is a gap between the retaining frame and the bottom surface of the accommodating cavity, and the retaining frame is arranged in the accommodating cavity of the box body in a suspended manner.

2. The fixing structure of the lifting drive device according to claim 1, characterized in that: The connecting ear includes an extension part and a plug-in part. The extension part is vertically arranged and extends to the side from the pressure plate. The two ends of the extension part are fixedly connected to the pressure plate and the plug-in part respectively; the plug-in part is roughly C-shaped, which includes two plug-in boards spaced up and down and arranged horizontally. Correspondingly, a slot is provided on the retaining frame. After the plug-in part is inserted into the slot, the retaining frame is fixedly connected to the two plug-in boards by two vertically arranged screws.

3. The fixing structure of the lifting drive device according to claim 1, characterized in that: The retaining frame includes a shock-absorbing sleeve and a connecting portion. The shock-absorbing sleeve is annular and has the same cross-sectional shape as the main body of the motor. The connecting portion is fixedly connected to the side of the shock-absorbing sleeve and the connecting ear is inserted into the connecting portion.

4. The fixing structure of the lifting drive device according to claim 1, characterized in that: The cage is made of rubber material.

5. The fixing structure of the lifting drive device according to claim 1, characterized in that: The pressure plate is roughly in an inverted U shape, and includes a horizontal plate and vertical plates located on both sides of the horizontal plate. The middle part of the horizontal plate abuts against the gear box and presses the gear box down. Two fixing ears extend from the lower end of the vertical plate, and the fixing ears are fixedly connected to the connecting column by screws; the connecting ears are formed by extending sideways from the vertical plate close to the main body.

6. The fixing structure of the lifting drive device according to claim 1, characterized in that: The box body includes a bottom plate with a boss protruding from the bottom plate; the bearing seat is also provided with two centrally symmetrical mounting platforms that protrude vertically upward from the bearing seat. The bottom of the mounting platform is hollow to form a mounting groove, the boss enters the mounting groove and the mounting platform and the boss are fixedly connected by screws.

7. The fixing structure of the lifting drive device according to claim 6, characterized in that: The height of the connecting column is greater than the height of the mounting platform.

8. The fixing structure of the lifting drive device according to claim 1, characterized in that: A rubber gasket is provided between the pressure plate and the gear box.

9. The fixing structure of the lifting drive device according to claim 1, characterized in that: It also includes a cover plate, which includes a buckle arranged downward; the box body includes end plates at both ends, each of which is provided with a slot, and the cover plate is installed above the box body and is engaged with the slot through the buckle.

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