Lifting type operation moving platform

Abstract

The utility model belongs to the technical field of mechanical automation engineering, and particularly relates to a lifting type operation mobile platform, which is characterized in that driving mechanisms are respectively arranged at four corners of a base, and each driving mechanism has the same structure and comprises a driving motor, a driving gear, a driven gear and a universal wheel; the lifting driving mechanism and the lifting arm mechanism are mounted in the middle of the base and are connected through a synchronous belt to realize power transmission; the lifting arm mechanism comprises a lead screw and multiple stages of lifting arms, the power source drives the lead screw to rotate, the lifting arms are sequentially driven through a lead screw nut structure, and then the connecting platform is driven to ascend and descend. According to the lifting type operation mobile platform, omnidirectional movement on the flat ground can be achieved, the large-size-height operation range can be achieved under the condition that the height of the mobile platform is limited, and the operation space of a robot is further expanded. The device is simple in structure and easy to control, and has a good operation range.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical automation engineering technical field, specifically, it is a lifting type operation mobile platform. BACKGROUND

[0002] With the development of economy, the number of hydropower stations of national construction increases year by year, and large hydropower stations have a large number of pressure vessels and pressure pipelines, and these pressure equipment is connected through flange joints. Due to long-term operation and environmental factors, the pipeline weld and flange joint may have a trace leakage phenomenon, causing the air compressor to start frequently, the energy consumption to increase, and the air compressor failure rate to increase, which affects the normal operation of the unit. In addition, the pressure equipment may also have other faults such as loose bolts, pipeline and support deformation, paint peeling, rust, cracks, etc. The traditional manual inspection method has the problems of high-altitude operation risk, low operation efficiency, and difficulty in detecting trace air leakage points. Therefore, the research of the lifting type operation mobile platform can not only adapt to the complex environment in the hydropower station, but also can carry different detection modules to realize the detection of pressure vessels and pressure pipelines, which has great research significance. CONTENT OF THE UTILITY MODEL

[0003] In order to meet the demand of detecting the pressure equipment and pressure pipeline at high place in the hydropower station by the operation load, and at the same time realize the complex operation environment in the hydropower station, the utility model aims to provide a lifting type operation mobile platform which can carry different detection modules.

[0004] The utility model aims to realize the following technical scheme:

[0005] The utility model discloses a base, upper cover, lifting arm mechanism, lifting drive mechanism, drive mechanism and universal wheel are installed with the same structure's drive mechanism respectively in the four corners of base, and the output end of each drive mechanism is connected with universal wheel, and the motion and steering of operation mobile platform are realized through the forward and reverse rotation of universal wheel driven by drive mechanism, the power transmission between lifting drive mechanism and lifting arm mechanism is through synchronous belt, one end of lifting arm mechanism is fixedly installed on base, the other end of lifting arm mechanism passes through upper cover, lifting arm mechanism has screw rod, lifting nut and multistage lifting arm, the rotation of screw rod is realized through the power transmission of synchronous belt of lifting drive mechanism, the linear motion of lifting nut is driven by the rotation of screw rod, and then multistage lifting arm is driven in turn to realize lifting motion.

[0006] The driving mechanism comprises a driving motor, a driving coupling, a power shaft, a driving gear, an output shaft, a driven shaft, a driven gear and a motor fixing support, the driving motor is fixed in the base through the motor fixing support, the output shaft of the driving motor is connected with one end of the power shaft which is rotatably installed on the motor fixing support through the driving coupling, and the other end of the power shaft is connected with the driving gear; the driven shaft is rotatably installed on the base, one end of the driven shaft is connected with the driven gear, the driven gear is engaged with the driving gear to realize power transmission, and the other end of the driven shaft is connected with the universal wheel through the output shaft.

[0007] The driving mechanism further comprises a driving bearing end cover, a limiting check ring, a driven bearing, a driven bearing end cover and a driving bearing, the driving bearing end cover is fixed on the motor fixing support, the driving bearing is embedded in the driving bearing end cover, the power shaft passes through the motor fixing support, the driving bearing and the driving bearing end cover in sequence and is fixedly connected with the driving gear, the outer rings on both sides of the driving bearing are respectively abutted against the motor fixing support and the driving bearing end cover, the inner ring of the driving bearing is abutted against the limiting check ring and the shaft shoulder on the power shaft, axial positioning is realized, the limiting check ring is sleeved on the power shaft and located between the driving bearing and the motor fixing support, the driven bearing end cover is fixed on the base, the driven bearing is embedded in the driven bearing end cover, one end of the driven shaft is fixedly connected with the driven gear, the other end of the driven shaft passes through the driven bearing end cover, the driven bearing and the base in sequence and is fixedly connected with one end of the output shaft, the other end of the output shaft is connected on the universal wheel, the outer rings on both sides of the driven bearing are respectively abutted against the driven bearing end cover and the base, the inner ring of the driven bearing is abutted against the shaft shoulder of the driven shaft, axial limiting is realized.

[0008] The lifting driving mechanism comprises a lifting motor, a lifting coupling, a lifting driving pulley, a lifting motor support, a lifting driving extension shaft, an extension shaft sleeve, a lifting bearing, a lifting bearing baffle, a lifting bearing base and a lifting bearing end cover, the lifting motor is fixedly installed on the base through the lifting motor support, the output end of the lifting motor is connected with one end of the lifting driving extension shaft through the lifting coupling, the other end of the lifting driving extension shaft passes through the lifting driving pulley, the extension shaft sleeve, the lifting bearing end cover, the lifting bearing and the lifting bearing base in sequence and is fixedly connected with the lifting driving pulley and the lifting bearing baffle, the lifting bearing is embedded in the lifting bearing base, one end of the lifting bearing base is fixedly connected with the base, the other end of the lifting bearing base is connected with the lifting bearing end cover, the outer rings on both ends of the lifting bearing are respectively abutted against the lifting bearing base and the lifting bearing end cover, the inner rings on both ends of the lifting bearing are respectively abutted against the lifting bearing baffle and the extension shaft sleeve, axial limiting is realized.

[0009] The lifting arm mechanism comprises a guide frame, a screw bearing end cover, a screw bearing base, a screw bearing baffle, a screw bearing, a screw shaft sleeve, a lifting driven pulley, a screw, a lifting nut, a multi-stage lifting arm, a support bearing, a support bearing baffle, a support bearing end cover, a sliding bearing and a support bearing seat, the guide frame is fixedly installed on the base, one end of the screw passes through the lifting driven pulley, the screw shaft sleeve, the screw bearing end cover, the screw bearing, the screw bearing base in sequence and is fixedly connected with the screw bearing baffle, the screw bearing base is fixed on the base, and the screw bearing is embedded in the screw bearing base; the other end of the screw passes through the lifting nut, the innermost stage of the lifting arm, the support bearing seat, the support bearing in sequence and is fixedly connected with the support bearing baffle, the support bearing seat is connected with the innermost stage of the lifting arm, the support bearing is embedded in the support bearing seat, the sliding bearing is arranged outside the support bearing seat, one end of the sliding bearing abuts against the support bearing seat, and the other end of the sliding bearing is fixedly connected with the support bearing end cover.

[0010] The outer ring of the screw bearing is in abutment with the screw bearing end cover and the screw bearing base at both ends, the inner ring of the screw bearing is in abutment with the screw shaft sleeve and the screw bearing baffle at both ends, axial limiting is realized, the outer ring of the support bearing is in abutment with the support bearing seat and the support bearing end cover at both ends, the inner ring of the support bearing is in abutment with the shaft shoulder on the screw and the support bearing baffle at both ends, axial limiting is realized, the inner and outer sides of the sliding bearing are in rotary contact with the support bearing seat and the innermost stage of the lifting arm respectively, and the two ends of the sliding bearing are in abutment with the support bearing seat and the support bearing end cover respectively, positioning is realized.

[0011] The lifting driven pulley is connected with the screw, power transmission is realized, the two ends of the lifting driven pulley are in abutment with the shaft shoulder on the screw and the screw shaft sleeve respectively, axial limiting is realized, and power transmission is realized between the lifting driven pulley and the lifting drive pulley in the lifting drive mechanism through a synchronous belt.

[0012] The multi-stage lifting arm comprises a primary lifting arm, a secondary lifting arm and a tertiary lifting arm, the inner side of the lifting nut is in threaded connection with the screw rod to realize linear motion, the outer side of the lifting nut is in rotational contact with the primary lifting arm, the end boss of the lifting nut is in abutment with the end of the primary lifting arm to drive the primary lifting arm to realize linear motion; the inner and outer sides of the secondary lifting arm are in sliding contact with the primary lifting arm and the tertiary lifting arm respectively, the inner side boss of the secondary lifting arm is in abutment with the outer side boss of the primary lifting arm raised to the highest point to realize linear motion, the inner side boss of the tertiary lifting arm is in abutment with the outer side boss of the secondary lifting arm raised to the highest point to realize linear motion, and the outer side of the tertiary lifting arm is in sliding contact with the lifting arm end cover and the lifting arm guide cylinder respectively.

[0013] The outer side wall boss of the primary lifting arm is in abutment with the end of the secondary lifting arm, and when the primary lifting arm performs vertical descending motion, the secondary lifting arm is driven to move; the outer side wall boss of the secondary lifting arm is in abutment with the end of the tertiary lifting arm, and when the secondary lifting arm performs vertical descending motion, the tertiary lifting arm is driven to move, so that descending is realized.

[0014] The bottom of the connecting platform is fixedly connected with the primary lifting arm, and the top of the connecting platform is connected with a load to realize linear motion.

[0015] The utility model discloses the advantages and positive effects are:

[0016] 1. The utility model provides a lifting type operation mobile platform, and its mechanism body size is smaller, but can realize the operation range of larger height.

[0017] 2. The mechanism of the utility model adopts multi-stage lifting mode, and the passive lifting function can be realized between the lifting arms, and the mobile platform can realize all -round movement and has good environmental adaptability.

[0018] 3. The lifting mechanism of the utility model can realize the lifting of larger load, and the structure is simple and easy to control. DRAWINGS

[0019] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the overhead sectional view schematic diagram of the utility model;

[0021] Figure 3 It is the main view sectional view schematic diagram of the utility model

[0022] Figure 4 It is a structural schematic view of the driving mechanism of the utility model;

[0023] Figure 5 It is a structural schematic view of the lifting driving mechanism and the lifting arm mechanism of the utility model;

[0024] Figure 6 It is a sectional view of the lifting driving mechanism and the lifting arm mechanism of the utility model;

[0025] Figure 7 It is a sectional view of the lifting arm mechanism of the utility model;

[0026] Figure 8 It is a sectional view of the lifting arm mechanism of the utility model;

[0027] Among them: 1 is base, 2 is upper cover, 3 is lifting arm mechanism, 4 is driving mechanism, 5 is lifting driving mechanism, 6 is multistage lifting arm, 7 is driving motor, 8 is driving coupling, 9 is driving bearing end cover, 10 is power shaft, 11 is driving gear, 12 is limit stop ring, 13 is driven bearing, 14 is output shaft, 15 is universal wheel, 16 is driven shaft, 17 is driven bearing end cover, 18 is driven gear, 19 is driving bearing, 20 is motor fixed support, 21 is lifting motor, 22 is lifting coupling, 23 is lifting driving pulley, 24 is lifting motor support, 25 is lifting arm support, 26 is lifting arm fixed assembly, 27 is synchronous belt, 28 is guide frame, 29 is lifting driving extension shaft, 30 is extension shaft sleeve, 31 is lifting bearing, 32 is lifting bearing baffle, 33 is lifting bearing base, 34 is lifting bearing end cover, 35 is screw shaft bearing end cover, 36 is screw shaft bearing base, 37 is screw shaft bearing baffle, 38 is screw shaft bearing, 39 is screw shaft sleeve, 40 is lifting driven pulley, 41 is screw shaft, 42 is lifting nut, 43 is first stage lifting arm, 44 is second stage lifting arm, 45 is third stage lifting arm, 46 is lifting arm end cover, 47 is lifting arm guide cylinder, 48 is lifting arm support, 49 is connecting platform, 50 is support bearing, 51 is support bearing baffle, 52 is support bearing end cover, 53 is sliding bearing, 54 is support bearing seat. DETAILED DESCRIPTION

[0028] The utility model will be further described in connection with the drawings.

[0029] As Figure 1 , Figure 2 and Figure 3As shown, the utility model of include base 1, upper cover 2, lifting arm mechanism 3, lifting drive mechanism 5 and install four drive mechanisms 4 of base 1 four corners, four drive mechanisms 4 all adopt same structure, pass through four drive mechanisms 4 drive the positive and negative rotation of universal wheel 15 to realize the movement and steering of operation mobile platform, lifting drive mechanism 5 and lifting arm mechanism 3 between through synchronous belt 27 transmission power, one end of lifting arm mechanism 3 is fixedly installed on base 1, and the other end passes through upper cover 2, can realize multistage telescopic motion, lifting arm mechanism 3 drives lifting nut 42 linear motion through the rotation of lead screw 41, and then in turn drive multistage lifting arm 6 realize large size lifting motion.

[0030] As Figure 4 As shown, the drive mechanism 4 of the embodiment includes drive motor 7, drive coupling 8, drive bearing end cover 9, power shaft 10, drive gear 11, limit stop ring 12, driven bearing 13, output shaft 14, universal wheel 15, driven shaft 16, driven bearing end cover 17, driven gear 18, drive bearing 19 and motor fixed support 20, drive motor 7 is fixed in base 1 through motor fixed support 20, the output shaft of drive motor 7 is connected with one end of power shaft 10 through drive coupling 8, the other end of power shaft 10 passes through motor fixed support 20, drive bearing 19, drive bearing end cover 9 in turn and is fixedly connected with drive gear 11;Drive bearing end cover 9 is fixed on motor fixed support 20, drive bearing 19 is embedded in drive bearing end cover 9, the outer ring of drive bearing 19 is respectively abutted with motor fixed support 20 and drive bearing end cover 9, the inner ring of drive bearing 19 is respectively abutted with limit stop ring 12 and the shaft shoulder on power shaft 10, realizes axial positioning;Limit stop ring 12 is provided on power shaft 10 and is located between drive bearing 19 and motor fixed support 20;Driven gear 18 is engaged with drive gear 11, realizes power transmission, one end of driven shaft 16 is fixedly connected with driven gear 18, the other end of driven shaft 16 passes through driven bearing end cover 17, driven bearing 13, base 1 in turn and is fixedly connected with one end of output shaft 14, the other end of output shaft 14 is connected on universal wheel 15;Driven bearing end cover 17 is fixed on base 1, driven bearing 13 is embedded in driven bearing end cover 17, the outer ring of driven bearing 13 is respectively abutted with driven bearing end cover 17 and base 1, the inner ring of driven bearing 13 is abutted with the shaft shoulder of driven shaft 16, realizes axial limit.

[0031] As Figure 5 And Figure 6As shown, the lifting driving mechanism 5 of the embodiment includes a lifting motor 21, a lifting coupling 22, a lifting driving pulley 23, a lifting motor support 24, a lifting driving extension shaft 29, an extension shaft sleeve 30, a lifting bearing 31, a lifting bearing baffle 32, a lifting bearing base 33, and a lifting bearing end cover 34. The lifting motor 21 is fixedly installed on the base 1 through the lifting motor support 24. The output end of the lifting motor 21 is connected with one end of the lifting driving extension shaft 29 through the lifting coupling 22. The other end of the lifting driving extension shaft 29 passes through the lifting driving pulley 23, the extension shaft sleeve 30, the lifting bearing end cover 34, the lifting bearing 31, the lifting bearing base 33 in sequence, and is fixedly connected with the lifting driving pulley 23 and the lifting bearing baffle 32. The lifting bearing 31 is embedded in the lifting bearing base 33. One end of the lifting bearing base 33 is fixedly connected with the base 1. The other end of the lifting bearing base 33 is connected with the lifting bearing end cover 34 through a standard part. The outer rings of the lifting bearing 31 are respectively abutted with the lifting bearing base 33 and the lifting bearing end cover 34. The inner rings of the lifting bearing 31 are respectively abutted with the lifting bearing baffle 32 and the extension shaft sleeve 30, so as to realize axial limiting. The extension shaft sleeve 30, the lifting bearing 31, the lifting bearing baffle 32, the lifting bearing base 33, and the lifting bearing end cover 34 of the embodiment constitute a lifting arm fixing assembly 26, which is used for fixing the lifting arm 6.

[0032] As shown in Figure 7 and Figure 8 As shown, the lifting arm mechanism 3 of the embodiment includes a guide frame 28, a screw bearing end cover 35, a screw bearing base 36, a screw bearing baffle 37, a screw bearing 38, a screw shaft sleeve 39, a lifting driven pulley 40, a screw 41, a lifting nut 42, a multi-stage lifting arm, a lifting arm end cover 46, a lifting arm guide cylinder 47, a connecting platform 49, a support bearing 50, a support bearing baffle 51, a support bearing end cover 52, a sliding bearing 53, and a support bearing seat 54. The guide frame 28 is fixedly installed on the base 1, so as to support the overall structure. One end of the screw 41 passes through the lifting driven pulley 40, the screw shaft sleeve 39, the screw bearing end cover 35, the screw bearing 38, the screw bearing base 36 in sequence, and is fixedly connected with the screw bearing baffle 37. The screw bearing base 36 is fixed on the base 1. The screw bearing 38 is embedded in the screw bearing base 36. The other end of the screw 41 passes through the lifting nut 42, the innermost stage of the lifting arm, the support bearing seat 54, the support bearing 50 in sequence, and is fixedly connected with the support bearing baffle 51. The support bearing seat 54 is connected with the innermost stage of the lifting arm. The support bearing 50 is embedded in the support bearing seat 54. The support bearing seat 54 is externally sleeved with the sliding bearing 53. One end of the sliding bearing 53 is abutted with the support bearing seat 54. The other end of the sliding bearing 53 is fixedly connected with the support bearing end cover 52.

[0033] The outer ring of the lead screw bearing 38 abuts against the lead screw bearing end cap 35 and the lead screw bearing base 36 at both ends, and the inner ring of the lead screw bearing 38 abuts against the lead screw bushing 39 and the lead screw bearing baffle 37 at both ends, achieving axial limiting. The outer ring of the support bearing 50 abuts against the support bearing seat 54 and the support bearing end cap 52 at both ends, and the inner ring of the support bearing 50 abuts against the shoulder on the lead screw 41 and the support bearing baffle 51 at both ends, achieving axial limiting. The inner and outer sides of the sliding bearing 53 are in rotational contact with the support bearing seat 54 and the innermost lifting arm (i.e., the first-stage lifting arm 43) at both ends, and the sliding bearing 53 abuts against the support bearing seat 54 and the support bearing end cap 52 at both ends, achieving positioning. In this embodiment, the support bearing seat 54, the support bearing 50, the support bearing baffle 51, the sliding bearing 53, and the support bearing end cap 52 constitute the lifting arm support 48.

[0034] In this embodiment, the lifting driven pulley 40 is connected to the lead screw 41 to achieve power transmission. The two ends of the lifting driven pulley 40 abut against the shaft shoulder and the lead screw bushing 39 on the lead screw 41, respectively, to achieve axial limiting. The lifting driven pulley 40 and the lifting drive pulley 23 in the lifting drive mechanism 5 achieve power transmission through the synchronous belt 27, and the transmission ratio is 1:1.

[0035] like Figure 7 As shown, the multi-stage lifting arm in this embodiment includes a primary lifting arm 43, a secondary lifting arm 44, and a tertiary lifting arm 45, with maximum strokes of 900mm, 800mm, and 700mm for each stage, respectively. The inner side of the lifting nut 42 is threadedly connected to the lead screw 41, enabling linear motion. The outer side of the lifting nut 42 is in rotatable contact with the primary lifting arm 43, and one end of the lifting nut 42 abuts against the end of the primary lifting arm 43, driving the primary lifting arm 43 to achieve linear motion. The inner and outer sides of the secondary lifting arm 44 are in sliding contact with the primary lifting arm 43 and the tertiary lifting arm 45, respectively. The inner boss of the secondary lifting arm 44 abuts against the outer boss of the primary lifting arm 43 at its highest point, achieving linear motion. The inner boss of the tertiary lifting arm 45... The outer protrusion of the second-stage lifting arm 44, which rises to the highest point, abuts against the outer side to achieve linear movement. The outer side of the third-stage lifting arm 45 slides in contact with the lifting arm end cover 46 and the lifting arm guide cylinder 47, respectively. The lifting arm end cover 46 is fixedly installed on the upper cover 2. One end of the lifting arm end cover 46 abuts against the outer protrusion of the third-stage lifting arm 45, which rises to the highest point, to achieve lifting limit. The bottom of the lifting arm guide cylinder 47 is fixedly connected to the guide frame 28. The side wall of the lifting arm guide cylinder 47 is fixedly connected to the guide frame 28 to achieve movement guidance of the multi-stage lifting arm 6.

[0036] The outer side wall boss of the first lifting arm 43 abuts against the end of the second lifting arm 44, when the first lifting arm 43 performs vertical descending movement, the second lifting arm 44 is driven to move, the outer side wall boss of the second lifting arm 44 abuts against the end of the third lifting arm 45, when the second lifting arm 44 performs vertical descending movement, the third lifting arm 45 is driven to move, and descending is realized.

[0037] The working principle of the utility model is:

[0038] The utility model is four-wheel drive lifting type operation mobile platform, can realize all -round movement. The driving motor 7 in the driving mechanism 4 provides power source, through the locking of driving coupling 8, power is transmitted to the power shaft 10, the other end of the power shaft 10 is fixedly connected through flange and driving gear 11, drives its rotation, driving gear 11 is engaged with driven gear 18, in turn drives the rotation of driven shaft 16 fixedly connected with driven gear 18, driven shaft 16 passes through driven shaft bearing end cover 17, driven shaft bearing 13 and base 1 in proper order, and is fixedly connected with output shaft 14, the other end of the output shaft 14 is connected through the connecting surface of universal wheel 15, drives the rotation of universal wheel 15, four same structures of driving mechanism 4 are controlled through forward and reverse rotation, in turn drives the movement and turning of the whole operation mobile platform.

[0039] The lifting of the utility model mainly relies on the driving of multi-stage lifting arm 6 by lifting driving mechanism 5. Lifting motor 21 provides power source, through locking lifting coupling 22, drives lifting driving extension shaft 29 to rotate, lifting driving extension shaft 29 is connected with lifting driving pulley 23 through flange plate, and power is transmitted to lifting driving pulley 23, synchronous belt 27 both ends are engaged with the gear of lifting driving pulley 23 and lifting driven belt drive 40 respectively, drives the rotation of lifting driven belt drive 40, lifting driven belt drive 40 drives screw 41 to rotate through special-shaped hole. Lifting nut 42 is connected with screw 41 through thread, and the rotation of screw 41 is converted into the linear motion of lifting nut 42, lifting nut 42 drives the lifting of first lifting arm 43, second lifting arm 44 and third lifting arm 45 in proper order through boss, and lifting operation is realized.

Claims

1. A lift-type work mobile platform characterized by comprising: Including base (1), upper cover (2), lifting arm mechanism (3), lifting drive mechanism (5), drive mechanism (4) and universal wheel (15), the four corners of base (1) are respectively provided with the same structure drive mechanism (4), the output end of each drive mechanism (4) is connected with universal wheel (15), the positive and negative rotation of universal wheel (15) is driven by drive mechanism (4), so that the movement and steering of the operation mobile platform are realized;The lifting drive mechanism (5) and the lifting arm mechanism (3) are connected by synchronous belt (27), one end of the lifting arm mechanism (3) is fixedly installed on the base (1), the other end of the lifting arm mechanism (3) passes through the upper cover (2), the lifting arm mechanism (3) has lead screw (41), lifting nut (42) and multistage lifting arm (6), the rotation of lead screw (41) is realized by the power transmission of synchronous belt (27), the linear motion of lifting nut (42) is driven by the rotation of lead screw (41), and then multistage lifting arm (6) is sequentially driven to realize lifting motion.

2. The lift-type work mobile platform according to claim 1, characterized by: The drive mechanism (4) includes drive motor (7), drive coupling (8), power shaft (10), drive gear (11), output shaft (14), driven shaft (16), driven gear (18) and motor fixing support (20), the drive motor (7) is fixed in the base (1) through the motor fixing support (20), the output shaft of the drive motor (7) is connected with one end of the power shaft (10) rotatably installed on the motor fixing support (20) through the drive coupling (8), the other end of the power shaft (10) is connected with the drive gear (11);The driven shaft (16) is rotatably installed on the base (1), one end of the driven shaft (16) is connected with the driven gear (18), the driven gear (18) is engaged with the drive gear (11) to realize power transmission, the other end of the driven shaft (16) is connected with the universal wheel (15) through the output shaft (14).

3. The lift-type work mobile platform according to claim 2, characterized by: The driving mechanism (4) further comprises a driving bearing end cover (9), a limiting stop ring (12), a driven bearing (13), a driven bearing end cover (17) and a driving bearing (19), the driving bearing end cover (9) is fixed on the motor fixed support (20), the driving bearing (19) is embedded in the driving bearing end cover (9), the power shaft (10) passes through the motor fixed support (20), the driving bearing (19), the driving bearing end cover (9) in sequence and is fixedly connected with the driving gear (11); the two side outer rings of the driving bearing (19) abut against the motor fixed support (20) and the driving bearing end cover (9) respectively, the inner ring of the driving bearing (19) abuts against the limiting stop ring (12) and the shaft shoulder on the power shaft (10) respectively, axial positioning is realized; the limiting stop ring (12) is sleeved on the power shaft (10) and is located between the driving bearing (19) and the motor fixed support (20); the driven bearing end cover (17) is fixed on the base (1), the driven bearing (13) is embedded in the driven bearing end cover (17), one end of the driven shaft (16) is fixedly connected with the driven gear (18), the other end of the driven shaft (16) passes through the driven bearing end cover (17), the driven bearing (13) and the base (1) in sequence and is fixedly connected with one end of the output shaft (14), the other end of the output shaft (14) is connected on the universal wheel (15), the two side outer rings of the driven bearing (13) abut against the driven bearing end cover (17) and the base (1) respectively, the inner ring of the driven bearing (13) abuts against the shaft shoulder of the driven shaft (16), axial limiting is realized.

4. The lift-type work mobile platform according to claim 1, characterized by: The lifting driving mechanism (5) comprises a lifting motor (21), a lifting coupling (22), a lifting driving pulley (23), a lifting motor support (24), a lifting driving extension shaft (29), an extension shaft sleeve (30), a lifting bearing (31), a lifting bearing baffle (32), a lifting bearing base (33) and a lifting bearing end cover (34), the lifting motor (21) is fixedly installed on the base (1) through the lifting motor support (24), the output end of the lifting motor (21) is connected with one end of the lifting driving extension shaft (29) through the lifting coupling (22), the other end of the lifting driving extension shaft (29) sequentially passes through the lifting driving pulley (23), the extension shaft sleeve (30), the lifting bearing end cover (34), the lifting bearing (31) and the lifting bearing base (33), and is fixedly connected with the lifting driving pulley (23) and the lifting bearing baffle (32), the lifting bearing (31) is embedded in the lifting bearing base (33), one end of the lifting bearing base (33) is fixedly connected with the base (1), the other end of the lifting bearing base (33) is connected with the lifting bearing end cover (34), the outer rings of the lifting bearing (31) are respectively abutted with the lifting bearing base (33) and the lifting bearing end cover (34), the inner rings of the lifting bearing (31) are respectively abutted with the lifting bearing baffle (32) and the extension shaft sleeve (30), and axial limiting is realized.

5. The lift-type work mobile platform according to claim 1, characterized by: The lifting arm mechanism (3) comprises a guide frame (28), a screw bearing end cover (35), a screw bearing base (36), a screw bearing baffle (37), a screw bearing (38), a screw sleeve (39), a lifting driven pulley (40), a screw (41), a lifting nut (42), a multi-stage lifting arm, a support bearing (50), a support bearing baffle (51), a support bearing end cover (52), a sliding bearing (53) and a support bearing seat (54), the guide frame (28) is fixedly installed on the base (1), one end of the screw (41) sequentially passes through the lifting driven pulley (40), the screw sleeve (39), the screw bearing end cover (35), the screw bearing (38), the screw bearing base (36), and is fixedly connected with the screw bearing baffle (37), the screw bearing base (36) is fixed on the base (1), and the screw bearing (38) is embedded in the screw bearing base (36); the other end of the screw (41) sequentially passes through the lifting nut (42), the innermost lifting arm, the support bearing seat (54), the support bearing (50), and is fixedly connected with the support bearing baffle (51), the support bearing seat (54) is connected with the innermost lifting arm, the support bearing (50) is embedded in the support bearing seat (54), the sliding bearing (53) is arranged outside the support bearing seat (54), one end of the sliding bearing (53) is abutted with the support bearing seat (54), and the other end of the sliding bearing (53) is fixedly connected with the support bearing end cover (52).

6. The lift-type work mobile platform according to claim 5, characterized by: The outer ring of the screw bearing (38) is in abutment with the screw bearing end cover (35) and the screw bearing base (36) at both ends, and the inner ring of the screw bearing (38) is in abutment with the screw shaft sleeve (39) and the screw bearing baffle (37) at both ends, so as to realize axial limiting; the outer ring of the support bearing (50) is in abutment with the support bearing seat (54) and the support bearing end cover (52) at both ends, and the inner ring of the support bearing (50) is in abutment with the shaft shoulder on the screw (41) and the support bearing baffle (51) at both ends, so as to realize axial limiting; the inner and outer sides of the sliding bearing (53) are in rotary contact with the support bearing seat (54) and the innermost lifting arm, respectively, and the two ends of the sliding bearing (53) are in abutment with the support bearing seat (54) and the support bearing end cover (52), respectively, so as to realize positioning.

7. The lift-type work mobile platform according to claim 5, characterized by: The lifting driven pulley (40) is connected with the screw (41) to realize power transmission, and the two ends of the lifting driven pulley (40) are in abutment with the shaft shoulder on the screw (41) and the screw shaft sleeve (39), respectively, to realize axial limiting; the lifting driven pulley (40) and the lifting drive pulley (23) in the lifting drive mechanism (5) are connected through the synchronous belt (27) to realize power transmission.

8. The lift-type work mobile platform according to claim 5, characterized by: The multi-stage lifting arm includes a first-stage lifting arm (43), a second-stage lifting arm (44) and a third-stage lifting arm (45), the inner side of the lifting nut (42) is threadedly connected with the screw (41) to realize linear motion, the outer side of the lifting nut (42) is in rotary contact with the first-stage lifting arm (43), and the end boss of the lifting nut (42) is in abutment with the end of the first-stage lifting arm (43) to drive the first-stage lifting arm (43) to realize linear motion; the inner and outer sides of the second-stage lifting arm (44) are in sliding contact with the first-stage lifting arm (43) and the third-stage lifting arm (45), respectively, the inner side boss of the second-stage lifting arm (44) is in abutment with the outer side boss of the first-stage lifting arm (43) raised to the highest point to realize linear motion, the inner side boss of the third-stage lifting arm (45) is in abutment with the outer side boss of the second-stage lifting arm (44) raised to the highest point to realize linear motion, and the outer side of the third-stage lifting arm (45) is in sliding contact with the lifting arm end cover (46) and the lifting arm guide cylinder (47), respectively; the lifting arm end cover (46) is fixedly installed on the upper cover (2), one end of the lifting arm end cover (46) is in abutment with the outer side boss of the third-stage lifting arm (45) raised to the highest point to realize lifting limiting, and the bottom of the lifting arm guide cylinder (47) is fixedly connected with the guide frame (28), and the side wall of the lifting arm guide cylinder (47) is fixedly connected with the guide frame (28) to realize the movement guidance of the multi-stage lifting arm (6).

9. The lift-type work mobile platform according to claim 8, characterized by: The outer side wall boss of the first-stage lifting arm (43) is in abutment with the end of the second-stage lifting arm (44), and when the first-stage lifting arm (43) performs vertical descending motion, the second-stage lifting arm (44) is driven to move; the outer side wall boss of the second-stage lifting arm (44) is in abutment with the end of the third-stage lifting arm (45), and when the second-stage lifting arm (44) performs vertical descending motion, the third-stage lifting arm (45) is driven to move to realize descending.

10. The lift-type work mobile platform according to claim 8, characterized by: The bottom of the connecting platform (49) is fixedly connected with the first lifting arm (43), and the top of the connecting platform (49) is connected with a load to realize linear motion.

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