CN215125303U

CN215125303U - Adjustable manual lift table

Info

Publication number: CN215125303U
Application number: CN202120328423.1U
Authority: CN
Inventors: 潘文明; 汤永飞
Original assignee: Shanghai Tengfei Communication Equipment Industry Co ltd
Current assignee: Shanghai Tengfei Communication Equipment Industry Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-12-14
Anticipated expiration: 2031-02-04

Abstract

The utility model belongs to the technical field of lift table technique and specifically relates to an adjustable manual lift table. The utility model provides an adjustable manual lift table which characterized in that: the upper end of the cross beam is connected with the working table surface, and the left side and the right side of the lower end of the cross beam are respectively connected with the left lifting table leg assembly and the right lifting table leg assembly; a driving spring is arranged on one side in the beam, one end of the driving spring is connected with one end of a cam disc driving rope, and the other end of the cam disc driving rope is connected with a cam disc assembly; the other end of the driving spring is connected with a spring tension regulator; the other end of the driving steel wire rope is divided into two paths and respectively connected with one end of the left driving rope and one end of the right driving rope, and the other end of the auxiliary steel wire rope is divided into two paths and respectively connected with the left auxiliary rope and the right auxiliary rope. Compared with the prior art, the automatic desktop height adjusting device can realize continuous adjustment of the desktop height, is time-saving and labor-saving in the operation process, and is widely applied to offices, families and the like.

Description

Adjustable manual lift table

Technical Field

The utility model belongs to the technical field of lift table technique and specifically relates to an adjustable manual lift table.

Background

The common office mode is a fixed-height office table, staffs work in a sitting posture, the sitting posture is fixed, the symptoms such as soreness of the waist, back pain, discomfort in shoulders and neck and the like can be caused after a long time, and serious health problems can also be caused. The height-adjustable lifting table in the market generally takes an electric lifting table as a main part, and the application occasions are relatively limited due to the requirement on electric power.

At present, lifting of a manual lifting table is realized in a plurality of ways, a handle is usually used for shaking, a screw rod structure is rotated relatively through a transmission device to generate relative displacement, so that the height of a table top is changed and adjusted, the labor is saved, but the adjusting speed is slow, a mechanism needs to be maintained frequently, otherwise the table top is easy to rust or block, and more physical power needs to be consumed for lifting the table top; the angle of the corresponding structure is changed through the bolt and the rotating mechanism, so that the height of the desktop is changed, but the desktop is inconvenient, has certain danger if the desktop is not locked, is slow in adjusting speed and can only be provided with discrete gears generally; the height of the desktop can be changed by directly matching the preset jack and the bolt, although the structure is simple, only a limited number of discrete gears can be used, the operation is dangerous, and certain requirements are also made on physical strength of users.

Disclosure of Invention

The utility model provides an adjustable manual lifting table for overcoming the defects of the prior art, which can realize the continuous adjustment of the height of the table top and save time and labor in the operation process; follow-up and follow-up stop can be realized as required by arranging the brake component.

In order to realize above-mentioned purpose, design an adjustable manual lift table, including crossbeam, table surface, lift table foot subassembly, its characterized in that: the upper end of the cross beam is connected with the working table surface, and the left side and the right side of the lower end of the cross beam are respectively connected with the left lifting table leg assembly and the right lifting table leg assembly; a driving spring is arranged on one side in the beam, one end of the driving spring is connected with one end of a cam disc driving rope, and the other end of the cam disc driving rope is connected with a cam disc assembly; the other end of the driving spring is connected with a spring tension regulator; the other end of the auxiliary steel wire rope is divided into two paths and respectively connected with one ends of the left driving rope and the right driving rope, and the other end of the auxiliary steel wire rope is divided into two paths and respectively connected with the left auxiliary rope and the right auxiliary rope; the left driving rope and the left auxiliary rope are connected with the left lifting table leg assembly through a left steering pulley, and the right driving rope and the right auxiliary rope are connected with the right lifting table leg assembly through a right steering pulley; and a force value display window is arranged on one side of the front part of the beam.

The cam disc component comprises a cam disc, an aluminum bracket, a rotating shaft, an auxiliary steel wire rope, a driving steel wire rope, a gear shaping component and a brake gear, wherein the aluminum bracket is arranged inside the left side of the cross beam and connected with the cam disc through the rotating shaft; the cam disc is respectively coiled with a driving steel wire rope and an auxiliary steel wire rope, and the coiling directions of the driving steel wire rope and the auxiliary steel wire rope are opposite.

The gear shaping assembly comprises a gear shaping seat, gear shaping teeth, a brake rope, a compression spring and a blocking piece, wherein the gear shaping seat is of a convex structure and is connected with the aluminum support through a bolt; the bottom of the gear shaping seat is provided with a groove, gear shaping is embedded in the groove, the head of the gear shaping is positioned outside the gear shaping seat, the inner side of the middle part of the gear shaping is provided with one end of a brake rope, and the other end of the brake rope is positioned outside the gear shaping seat; the upper part of the brake rope is a slender rod, a front compression spring, a baffle and a rear compression spring are sleeved on the upper part of the brake rope, one end of the front compression spring is abutted to the head part of the brake rope, the other end of the front compression spring is abutted to the front end of the baffle, the rear end of the baffle is abutted to one end of the rear compression spring, and the other end of the rear compression spring is abutted to the lower part of the brake rope; the blocking piece is arranged in a blocking piece groove in the gear shaping.

The head of the gear shaping consists of 4 inclined planes, and the taper of the head of the gear shaping is matched with the tooth grooves of the brake gear.

A gear shaping groove is formed in one side of the upper part of the gear shaping; a shifting fork is arranged on one side of the upper part of the gear shaping, the shifting fork is of an L-shaped structure, the bottom surface of the upper part of the shifting fork is connected with a shifting fork boss, and the lower part of the shifting fork boss is positioned in the gear shaping groove; the end part of the shifting fork is connected with the upper part of the gear shaping by a shifting fork spring, and the tail part of the shifting fork is positioned on the aluminum bracket.

The spring tension regulator comprises a spring seat bottom plate, a force value pointer, a spring seat, a spring end, an adjusting screw, a bevel gear, an adjusting shaft and a gear box, wherein the bottom of the spring seat bottom plate is connected with the inner side of the cross beam, one side of the spring seat bottom plate is connected with the spring seat through a chute, the other side of the spring seat bottom plate is provided with the gear box, the gear box is internally provided with the bevel gear and the other bevel gear, the bevel gear and the other bevel gear are meshed and connected with each other, the bevel gear is coupled with one end of the adjusting screw, and the other end of the adjusting screw penetrates through the gear box and the spring seat and is connected with the spring end; the other bevel gear is coupled with one end of the adjusting shaft, and the other end of the adjusting shaft is connected with the cross beam.

The end of the spring is connected with the other end of the driving spring.

The front part of the spring seat is connected with a force value pointer, the force value pointer is of a J-shaped structure, one end of the force value pointer is connected with the spring seat, and the pointer at the other end of the force value pointer is located at a force value display window at the front part of the cross beam.

The left lifting table leg component and the right lifting table leg component are consistent in structure.

Left side lift table foot subassembly include left outer tube, left well pipe subassembly, left inner tube, left table foot be rectangular shape structure, the bottom of left inner tube is connected to the upper end of left table foot, the lower part of left outer tube is connected through left well pipe subassembly in the upper portion of left inner tube, the bottom of crossbeam is connected to the upper end of left outer tube.

The right elevating table leg assembly comprises a right outer tube, a right middle tube assembly, a right inner tube and a right table leg, the right table leg is of a long strip-shaped structure, the upper end of the right table leg is connected with the bottom of the right inner tube, the upper portion of the right inner tube is connected with the lower portion of the right outer tube through the right middle tube assembly, and the upper end of the right outer tube is connected with the bottom of the cross beam.

The left middle pipe assembly and the right middle pipe assembly are consistent in structure, a roller frame is sleeved on the left middle pipe assembly, a plurality of rollers are uniformly distributed on the roller frame, and the rollers are connected with a bottom pulley of the left steering pulley assembly in a rolling mode.

Compared with the prior art, the utility model provides an adjustable manual lifting table, which can realize the continuous adjustment of the height of the table top and save time and labor in the operation process; the brake component can also realize follow-up and follow-up stop as required, and is widely used in offices, families and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 and fig. 3 are schematic structural views of the removal workbench of the present invention.

Fig. 4 is a top view of the structure of the present invention with the work table removed.

Figure 5 is a schematic view of a cam plate assembly.

Fig. 6 is a schematic structural view of the gear shaping assembly.

Fig. 7 is a structural bottom view of the gear shaping assembly.

FIG. 8 is a schematic view of the gear shaping assembly with the gear shaping base removed.

FIG. 9 is a schematic view of a brake cable configuration.

FIG. 10 is a schematic view of the connection of the brake gear and the gear shaping assembly.

FIG. 11 is a schematic view of the fork inside the cam plate assembly.

FIG. 12 is a schematic view of a connection structure of a shift fork and a gear shaping assembly.

FIG. 13 is a schematic view of a connection structure of a shift fork and a gear shaping.

FIG. 14 is a schematic view of a tooth insertion groove structure.

Fig. 15 is a schematic diagram of a fork structure.

Fig. 16 is a partial schematic view of the internal structure of the beam.

Fig. 17 is a schematic diagram of a spring tension adjuster.

FIG. 18 is a schematic view of the internal structure of the gear case.

Fig. 19 is a schematic view of a spring seat structure.

Fig. 20 is a schematic diagram of a spring seat bottom plate structure.

FIG. 21 is a schematic view of the connection of the left outer tube, the left middle tube assembly, and the left inner tube.

Fig. 22 is a schematic diagram of a left center tube assembly.

Fig. 23 is a schematic view of the position of the wire rope when the work surface is raised to the highest position.

Fig. 24 is a schematic view of the position of the wire rope when the work surface is lowered to the lowest position.

FIG. 25 is a schematic view of auxiliary rope run when the work surface is raised.

FIG. 26 is a schematic view of the active cord run as the countertop is raised.

Fig. 27 is a schematic view of auxiliary rope run when the work table is lowered.

FIG. 28 is a schematic view of the active rope run when the work bench is lowered.

Referring to fig. 1 to 22, 1 is a table top, 2 is a cross beam, 3 is a left outer tube, 4 is a left middle tube assembly, 5 is a left inner tube, 6 is a left table leg, 7 is a right outer tube, 8 is a right middle tube assembly, 9 is a right inner tube, 10 is a right table leg, 11 is a cam disc assembly, 12 is a cam disc drive rope, 13 is a drive spring, 14 is a left auxiliary rope, 15 is a right auxiliary rope, 16 is a spring tension adjuster, 17 is a left main rope, 18 is a right main rope, 19 is a left steering pulley assembly, 20 is a right steering pulley assembly, 21 is an active wire rope, 22 is an auxiliary wire rope, 23 is a force value display window, 24 is an aluminum bracket, 25 is a rotating shaft, 26 is a cam disc, 27 is a brake gear, 28 is a gear shaping assembly, 29 is a gear box, 30 is a gear, 31 is a brake rope, 32 is a front side compression spring, 33 is a baffle, 34 is a rear side compression spring, 35 is a spring end, 36 is a spring seat, 37 is a force value pointer, 38 is a spring seat bottom plate, 39 is an adjusting shaft, 40 is an adjusting screw, 41 is a bevel gear, 42 is another bevel gear, 43 is a gear box, 44 is a roller frame, 45 is a roller, 46 is a shifting fork, 47 is a shifting fork boss, 48 is a gear shaping groove, and 49 is a shifting fork spring.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 24, the upper end of the beam 2 is connected with the working table top 1, and the left and right sides of the lower end of the beam 2 are respectively connected with the left lifting table leg assembly and the right lifting table leg assembly; a driving spring 13 is arranged on one side in the beam 2, one end of the driving spring 13 is connected with one end of a cam disc driving rope 12, and the other end of the cam disc driving rope 12 is connected with the cam disc assembly 11; the other end of the driving spring 13 is connected with a spring tension regulator 16; one ends of a driving steel wire rope 21 and an auxiliary steel wire rope 22 which are opposite in winding direction are wound on the cam disc assembly 11, the other end of the driving steel wire rope 21 is divided into two paths and is respectively connected with one ends of a left driving rope 17 and a right driving rope 18, and the other end of the auxiliary steel wire rope 22 is divided into two paths and is respectively connected with a left auxiliary rope 14 and a right auxiliary rope 15; the left driving rope 17 and the left auxiliary rope 14 are connected with the left lifting table leg assembly through a left steering pulley 19, and the right driving rope 18 and the right auxiliary rope 15 are connected with the right lifting table leg assembly through a right steering pulley 20; a force value display window 23 is arranged on one side of the front part of the crossbeam 2.

The cam disc assembly 11 comprises a cam disc, an aluminum bracket, a rotating shaft, an auxiliary steel wire rope, a driving steel wire rope, a gear shaping assembly and a brake gear, wherein the aluminum bracket 24 is arranged inside the left side of the cross beam 2, the aluminum bracket 24 is connected with the cam disc 26 through the rotating shaft 25, the lower part of the cam disc 26 is connected with the brake gear 27 in a shaft mode, the gear shaping assembly 28 is arranged on one side of the brake gear 27, and the gear shaping assembly 28 is connected with the inside of the aluminum bracket 24; the cam plate 26 is respectively wound with the driving wire rope 21 and the auxiliary wire rope 22, and the winding directions of the driving wire rope 21 and the auxiliary wire rope 22 are opposite.

The gear shaping component 28 comprises a gear shaping seat, gear shaping, a brake rope, a compression spring and a baffle plate, the gear shaping seat 29 is of a convex structure, and the gear shaping seat 29 is connected with the aluminum bracket 24 through a bolt; a groove is formed in the bottom of the gear shaping seat 29, gear shaping teeth 30 are embedded in the groove, the head of each gear shaping tooth 30 is located on the outer side of the gear shaping seat 29, one end of a brake rope 31 is arranged on the inner side of the middle of each gear shaping tooth 30, and the other end of each brake rope 31 is located on the outer side of the gear shaping seat 29; the upper part of the brake rope 31 is a slender rod, the upper part of the brake rope 31 is sleeved with a front compression spring 32, a blocking piece 33 and a rear compression spring 34, one end of the front compression spring 32 is abutted to the head part of the brake rope 31, the other end of the front compression spring 32 is abutted to the front end of the blocking piece 33, the rear end of the blocking piece 33 is abutted to one end of the rear compression spring 34, and the other end of the rear compression spring 34 is abutted to the lower part of the brake rope 31; the blocking plate 33 is arranged in the blocking plate groove inside the gear shaping 30.

The head of the gear shaping 30 consists of 4 ramps and the taper of the head of the gear shaping 30 matches the tooth slot of the brake gear 27.

A gear shaping groove 48 is formed in one side of the upper part of the gear shaping 30; a shifting fork 46 is arranged on one side of the upper part of the gear shaping 30, the shifting fork 46 is of an L-shaped structure, the bottom surface of the upper part of the shifting fork 46 is connected with a shifting fork boss 47, and the lower part of the shifting fork boss 47 is positioned in a gear shaping groove 48; the end part of the shifting fork 46 is connected with the upper part of the gear shaping 30 by a shifting fork spring 49, and the tail part of the shifting fork 46 is positioned on the aluminum bracket 24.

The spring tension regulator 16 comprises a spring seat bottom plate, a force value pointer, a spring seat, a spring end, a regulating screw, a bevel gear, a regulating shaft and a gear box, wherein the bottom of the spring seat bottom plate 38 is connected with the inner side of the cross beam 2, one side of the spring seat bottom plate 38 is connected with the spring seat 36 through a sliding chute, the other side of the spring seat bottom plate 38 is provided with the gear box 43, a bevel gear 41 and another bevel gear 42 are arranged in the gear box 43, the bevel gear 41 and the another bevel gear 42 are mutually meshed and connected, the bevel gear 41 is connected with one end of a regulating screw 40 in a shaft-connected mode, and the other end of the regulating screw 40 penetrates through the gear box 43 and the spring seat 36 and is connected with the spring end 35; another bevel gear 42 is journalled to one end of the adjusting shaft 39, and the other end of the adjusting shaft 39 is connected to the cross beam 2.

The spring head 35 is connected to the other end of the drive spring 13.

The front part of the spring seat 36 is connected with a force value pointer 37, the force value pointer 37 is of a J-shaped structure, one end of the force value pointer 37 is connected with the spring seat 36, and the pointer at the other end of the force value pointer 37 is positioned at the force value display window 23 at the front part of the cross beam 2.

Left side lift table foot subassembly includes left outer tube, left well pipe subassembly, left inner tube, left table foot 6 be rectangular shape structure, the bottom of left inner tube 5 is connected to the upper end of left table foot 6, the lower part of left outer tube 3 is connected through left well pipe subassembly 4 on the upper portion of left inner tube 5, the bottom of crossbeam 2 is connected to the upper end of left outer tube 3.

The right elevating table leg assembly comprises a right outer tube, a right middle tube assembly, a right inner tube and a right table leg, the right table leg 10 is of a long strip-shaped structure, the upper end of the right table leg 10 is connected with the bottom of the right inner tube 9, the upper portion of the right inner tube 9 is connected with the lower portion of the right outer tube 7 through the right middle tube assembly 8, and the upper end of the right outer tube 7 is connected with the bottom of the cross beam 2.

The left middle pipe assembly 4 and the right middle pipe assembly 8 are consistent in structure, a roller frame 44 is sleeved on the left middle pipe assembly 4, a plurality of rollers 45 are uniformly distributed on the roller frame 44, and the rollers 45 are connected with a bottom pulley of the left steering pulley assembly 19 in a rolling mode. Similarly, rollers in the right intermediate tube assembly 8 are in rolling contact with the bottom pulley of the right diverting pulley assembly 20.

The lifting table of the utility model is powered by a driving spring 13 and is connected with a cam disc component 11 through a cam disc driving rope 12; the cam disc 26 is wound with the driving steel wire rope 21 and the auxiliary steel wire rope 22, and the winding directions are opposite; the two steel wire ropes are respectively connected with the active rope and the auxiliary rope in the left table leg and the right table leg.

As shown in figures 21 and 22, a middle pipe assembly is arranged between the inner pipe and the outer pipe of the table leg, and the outer pipe slides up and down through the rolling of the roller 45 on the middle pipe and the relative movement of the driving rope and the auxiliary rope. The middle pipe assembly is installed between the outer pipe and the inner pipe, and the expansion of the inner pipe and the expansion of the outer pipe and the lifting of the table are used due to the rolling friction of the rollers 45.

As shown in fig. 10, when the lifting table of the present invention is in a positioning state, due to the pulling force of the driving spring 13, the braking gear 27 is stressed clockwise, the braking gear 27 is engaged with the gear shaping assembly 28, a circumferential force F1 is generated, and the braking gear 27 is locked; when the table is lifted, the front compression spring 32 is pulled first by pulling the brake cord 31, and if the spring tension is larger than the frictional force F generated by F1, the front compression spring 32 and the rear compression spring 34 are compressed at the same time, the gear teeth 30 are released, and the table is lifted. If the pulling force of the front compression spring 32 is smaller than the friction force F, the gear shaping 30 is not moved in the original position, and the table top needs to be pressed down to enable the brake gear 27 to rotate anticlockwise, and a reverse force F2 is added to enable the gear shaping 30 to be loosened. When the lifting force is balanced with the load of the table top, the gear shaping 30 can be easily loosened, the more the lifting force is larger than the load of the table top, the larger reverse force F2 needs to be added to ensure that the gear shaping 30 can be loosened, and the self-locking function of the gear shaping brake is realized. When the brake rope 31 is pulled by mistake, the table top cannot be lifted easily, and the safety protection effect is achieved.

As shown in fig. 11 to 15, in actual use, when the spring force and the table top load force value are greatly different, the lateral pressure of the brake gear 27 on the side of the gear 30 is increased, the gear 30 cannot be disengaged even if the brake rope 31 is pulled, and the table cannot be lifted. The gear unlocking mechanism solves the problem.

The gear shaping assembly 28 is mounted on the aluminum bracket 24, and the aluminum bracket 24 is fixed on the cross beam 2. An operating hole is formed in the bottom of the beam 2 opposite the end of the fork 46. A round rod with the diameter of 8mm is used for upwards propping against the end part of the shifting fork 46 to drive the gear shaping 30 to retract and separate from the brake gear 27, so that the desk can normally work.

As shown in fig. 23 to 28, when the platform surface is pressed down, the driving spring 13 is stretched, the cam disc assembly 11 rotates counterclockwise, the driving wire rope 21 is driven to move downward, and the auxiliary wire rope 22 moves upward. When the platform surface is lifted, the driving spring 13 retracts, the cam disc assembly 11 rotates clockwise, the driving steel wire rope 21 is driven to move upwards, and the auxiliary steel wire rope 22 moves downwards.

As shown in fig. 16 to 20, the spring tension adjuster 16 can be adjusted to adjust the initial length of the drive spring 13 according to the load force of the table top. A spring end 35 is arranged in the end portion of the spring, the driving spring 13 is placed on a spring seat 36, the spring seat 36 is clamped on a spring seat bottom plate 38, a force value pointer 37 is fixed on the spring seat 36, and the spring seat bottom plate 38 is fixed on the cross beam 2. An adjusting screw 40 of the type M10 of the spring tension adjuster 16 is connected to the internal thread of the spring head 35. When the spring force needs to be increased, the adjusting shaft 39 rotates clockwise, and the adjusting screw 40 drives the spring end 35 to move rightwards through the transmission of another bevel gear 42, so that the driving spring 13, the spring seat 36 and the force value pointer 37 synchronously move rightwards. When the spring force is reduced, it moves to the left instead. At the right part of the beam 2, a force value pointer 23 is provided with a display window, and the spring force value can be adjusted according to the marked line.

The inner pipe and the outer pipe of the table leg of the utility model adopt the high-quality cold-drawn square pipe, the surface is smooth and finished, the size precision is high, the inner pipe and the outer pipe are matched with the roller of the middle pipe to slide, the sliding is stable, the resistance is small, the noise is low, and the service life is long; the spring tension regulator rotates by adopting a bevel gear with a lower die number, so that the cost is low and the rotation is stable; the table top can be randomly positioned by matching the brake gear with the gear shaping, the structure is simple, the cost is low, and the locking force is large; the self-locking function is realized, and the safety and the reliability are realized; the transmission steel wire rope adopts a high-strength galvanized steel wire rope and is matched with a specially designed U-groove roller, so that the transmission steel wire rope has the advantages of low transmission noise, stable operation, low abrasion and long service life.

Claims

1. The utility model provides an adjustable manual lift table, includes crossbeam, table surface, lift table foot subassembly, its characterized in that: the upper end of the cross beam (2) is connected with the working table top (1), and the left side and the right side of the lower end of the cross beam (2) are respectively connected with the left lifting table leg assembly and the right lifting table leg assembly; a driving spring (13) is arranged on one side in the beam (2), one end of the driving spring (13) is connected with one end of a cam disc driving rope (12), and the other end of the cam disc driving rope (12) is connected with a cam disc component (11); the other end of the driving spring (13) is connected with a spring tension regulator (16); one ends of a driving steel wire rope (21) and an auxiliary steel wire rope (22) which are opposite in winding direction are wound on the cam disc assembly (11), the other end of the driving steel wire rope (21) is divided into two paths and is respectively connected with one ends of a left driving rope (17) and a right driving rope (18), and the other end of the auxiliary steel wire rope (22) is divided into two paths and is respectively connected with a left auxiliary rope (14) and a right auxiliary rope (15); the left active rope (17) and the left auxiliary rope (14) are connected with the left lifting table foot component through a left steering pulley component (19), and the right active rope (18) and the right auxiliary rope (15) are connected with the right lifting table foot component through a right steering pulley component (20); a force value display window (23) is arranged on one side of the front part of the beam (2).

2. An adjustable manual lifting table according to claim 1 wherein: the cam disc assembly (11) comprises a cam disc, an aluminum support, a rotating shaft, an auxiliary steel wire rope, a driving steel wire rope, a gear shaping assembly and a brake gear, wherein the aluminum support (24) is arranged inside the left side of the cross beam (2), the aluminum support (24) is connected with the cam disc (26) through the rotating shaft (25), the lower part of the cam disc (26) is in shaft connection with the brake gear (27), the gear shaping assembly (28) is arranged on one side of the brake gear (27), and the gear shaping assembly (28) is connected with the inside of the aluminum support (24); an active steel wire rope (21) and an auxiliary steel wire rope (22) are respectively coiled on the cam plate (26), and the coiling directions of the active steel wire rope (21) and the auxiliary steel wire rope (22) are opposite.

3. An adjustable manual lifting table according to claim 2 wherein: the gear shaping assembly (28) comprises a gear shaping seat, gear shaping, a brake rope, a compression spring and a baffle plate, wherein the gear shaping seat (29) is of a convex structure, and the gear shaping seat (29) is connected with the aluminum bracket (24) through a bolt; a groove is formed in the bottom of the gear shaping seat (29), gear shaping teeth (30) are embedded in the groove, the head portions of the gear shaping teeth (30) are located on the outer side of the gear shaping seat (29), one end of a brake rope (31) is arranged on the inner side of the middle of the gear shaping teeth (30), and the other end of the brake rope (31) is located on the outer side of the gear shaping seat (29); the upper part of the brake rope (31) is a slender rod, a front compression spring (32), a baffle (33) and a rear compression spring (34) are sleeved on the upper part of the brake rope (31), one end of the front compression spring (32) is abutted to the head of the brake rope (31), the other end of the front compression spring (32) is abutted to the front end of the baffle (33), the rear end of the baffle (33) is abutted to one end of the rear compression spring (34), and the other end of the rear compression spring (34) is abutted to the lower part of the brake rope (31); the blocking piece (33) is arranged in the blocking piece groove in the gear shaping (30).

4. An adjustable manual lifting table according to claim 3 wherein: the head of the gear shaping (30) consists of 4 inclined planes, and the taper of the head of the gear shaping (30) is matched with the tooth groove of the brake gear (27).

5. An adjustable manual lifting table according to claim 3 or 4 wherein: a gear shaping groove (48) is formed in one side of the upper part of the gear shaping (30); a shifting fork (46) is arranged on one side of the upper part of the gear shaping (30), the shifting fork (46) is of an L-shaped structure, the bottom surface of the upper part of the shifting fork (46) is connected with a shifting fork boss (47), and the lower part of the shifting fork boss (47) is positioned in a gear shaping groove (48); the end part of the shifting fork (46) is connected with the upper part of the gear shaping (30) by a shifting fork spring (49), and the tail part of the shifting fork (46) is positioned on the aluminum bracket (24).

6. An adjustable manual lifting table according to claim 1 wherein: the spring tension regulator (16) comprises a spring seat bottom plate, a force value pointer, a spring seat, a spring end, a regulating screw, a bevel gear, a regulating shaft and a gear box, wherein the bottom of the spring seat bottom plate (38) is connected with the inner side of the cross beam (2), one side of the spring seat bottom plate (38) is connected with the spring seat (36) through a sliding groove, the other side of the spring seat bottom plate (38) is provided with the gear box (43), the gear box (43) is internally provided with a bevel gear (41) and another bevel gear (42), the bevel gear (41) is meshed and connected with the other bevel gear (42), the bevel gear (41) is connected with one end of the regulating screw (40) in a shaft coupling mode, and the other end of the regulating screw (40) penetrates through the gear box (43) and the spring seat (36) and is connected with the spring end (35); the other bevel gear (42) is coupled with one end of the adjusting shaft (39), and the other end of the adjusting shaft (39) is connected with the beam (2).

7. An adjustable manual lifting table according to claim 6 wherein: the spring end (35) is connected with the other end of the driving spring (13).

8. An adjustable manual lifting table according to claim 6 wherein: the front part of the spring seat (36) is connected with a force value pointer (37), the force value pointer (37) is of a J-shaped structure, one end of the force value pointer (37) is connected with the spring seat (36), and the pointer at the other end of the force value pointer (37) is positioned at a force value display window (23) at the front part of the cross beam (2).

9. An adjustable manual lifting table according to claim 1 wherein: the left lifting table leg component and the right lifting table leg component are consistent in structure.

10. An adjustable manual lifting table according to claim 1 or 9 wherein: left side lift table foot subassembly include left outer tube, left well pipe subassembly, left inner tube, left table foot (6) be rectangular shape structure, the bottom of left inner tube (5) is connected to the upper end of left table foot (6), the lower part of left outer tube (3) is connected through left well pipe subassembly (4) in the upper portion of left inner tube (5), the bottom of crossbeam (2) is connected to the upper end of left outer tube (3).

11. An adjustable manual lifting table according to claim 1 or 9 wherein: the right elevating table leg assembly comprises a right outer tube, a right middle tube assembly, a right inner tube and a right table leg, the right table leg (10) is of a long strip-shaped structure, the upper end of the right table leg (10) is connected with the bottom of the right inner tube (9), the upper portion of the right inner tube (9) is connected with the lower portion of the right outer tube (7) through the right middle tube assembly (8), and the upper end of the right outer tube (7) is connected with the bottom of the cross beam (2).

12. An adjustable manual lifting table according to claim 10 wherein: the structure of left well pipe subassembly (4) and right well pipe subassembly (8) unanimous, the cover is equipped with roller frame (44) on left well pipe subassembly (4), the equipartition is equipped with a plurality of rollers (45) on roller frame (44), a plurality of rollers (45) roll connection left turn to the bottom pulley of pulley assembly (19).