Push rod for lifting cart

Abstract

The utility model relates to the technical field of push rods, in particular to a push rod for a lifting cart, which comprises a bottom frame, a lifting device, a lifting platform and a handle. The bottom of the underframe is supported through pulleys, the middle is connected with the lifting platform through a lifting device, and a handle is arranged on the side face. The lifting device comprises a shear fork type lifting assembly and an electric push rod; the scissor-type lifting assembly is connected with the underframe and the lifting platform and is driven by an electric push rod; the electric push rod comprises a motor, a nut, an inner pipe, an outer pipe, a lead screw, a Hall element, a magnet and a clamping ring support. According to the device, lifting can be safer, and the lifting safety and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a push rod technical field especially a kind of push rod for lifting trolley. BACKGROUND

[0002] Traditional trolley can be restricted by ground condition or design when moving, it occupies large space, adjustable range is small, flexibility is poor, it is more laborious to operate, and stability is poor.Some existing scissor-type lifting trolley, the efficiency of elevator is lower, in the same load condition, energy consumption is more, and push rod meets jam and abnormal situation, will lead to abnormal damage and safety accident. CONTENT OF UTILITY MODEL

[0003] In order to overcome the existing insufficient, the utility model provides a kind of push rod for lifting trolley.

[0004] The utility model discloses a kind of push rod for lifting trolley, including chassis, lifting device, lifting platform and handle;The bottom of the chassis is supported by pulley, middle is connected lifting platform by lifting device, side is equipped with handle;The lifting device includes scissor-type lifting assembly and electric push rod;The scissor-type lifting assembly is connected with chassis and lifting platform, and is driven by electric push rod;The electric push rod includes motor, nut, inner tube, outer tube, screw rod, hall element, magnet and collar support;The motor is installed on the mounting seat of outer tube side, output shaft is connected with screw rod by transmission mechanism;The screw rod is connected with nut by screw thread;The nut outer side wall is equipped with collar support, top end connects inner tube;The collar support is installed between nut and outer tube inner wall, and hall element and magnet are installed on it;The inner tube side is equipped with the groove of installation signal line, and the signal line is connected with hall element;The outer tube bottom and inner tube top are connected with scissor-type lifting assembly.

[0005] According to another embodiment of the utility model, further include, the scissor-type lifting assembly includes support rod group one, support rod group two, support rod group three, support rod group four, rotation rod group one, rotation rod group two;Support rod group one, support rod group two are equipped with two groups respectively, and each group is cross arranged, rotationally connected, and bottom is rotationally connected with chassis;The top of each group of support rod group one is rotationally connected with support rod group three by rotation rod group one, and the top of each group of support rod group two is rotationally connected with support rod group four by rotation rod group two;Support rod group three, support rod group four top cross arrangement, rotationally connected, and top is rotationally connected with lifting platform.

[0006] According to another embodiment of the utility model, further include, the middle of two groups of support rod group one is equipped with positioning rod one, and the middle of two groups of support rod group four is equipped with positioning rod two;Positioning rod one and positioning rod two are parallelly arranged, and positioning rod one is connected with the bottom of outer tube of electric push rod, and positioning rod two is connected with the top of inner tube of electric push rod.

[0007] According to another embodiment of the utility model, further include, the hall element is arranged directly above the magnet.

[0008] According to another embodiment of the utility model, further include, the nut top end outside is equipped with external thread, with the internal thread of inner tube inner wall is matched.

[0009] According to another embodiment of the utility model, further include, the handle includes handlebar and guard pole, the guard pole bottom is installed on the chassis, top is equipped with handlebar, and the middle is installed with electric control box;Lifting button is equipped on the handlebar, and the electric control box is electrically connected with lifting button, electric push rod.

[0010] The utility model has the advantages that when the push rod retracts, the inner tube and the nut end face are close, and the hall and the magnet have normal signal output;When encountering blockage and abnormal conditions, the inner tube separates from the nut end face due to external force, and the hall signal is terminated, so that the push rod no longer retracts to reduce abnormal damage and safety accidents;The device has strong carrying capacity, good stability, simple operation, wide application scenarios, stable operation and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be further described below in combination with the drawings and examples.

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] Figure 2 It is the structural schematic diagram of the inner tube;

[0014] Figure 3 It is the sectional view of the outer tube.

[0015] In the drawing, 1, chassis, 2, lifting device, 3, lifting platform, 4, handle, 5, pulley, 6, scissor type lifting assembly, 7, electric push rod, 8, motor, 9, nut, 10, inner tube, 11, outer tube, 12, screw rod, 13, hall element, 14, magnet, 15, collar support, 16, signal line, 17, support pole group one, 18, support pole group two, 19, support pole group three, 20, support pole group four, 21, rotating rod group one, 22, rotating rod group two, 23, positioning rod one, 24, positioning rod two, 25, handlebar, 26, guard pole, 27, electric control box, 28, lifting button. DETAILED DESCRIPTION

[0016] As Figure 1The utility model discloses a structure schematic drawing, a kind of push rod for lifting cart, including chassis 1, lifting device 2, lifting platform 3 and handle 4;The bottom of the chassis 1 is supported by pulley 5, and lifting platform 3 is connected by lifting device 2 in the middle, and side surface is equipped with handle 4;The lifting device 2 includes scissor type lifting assembly 6 and electric push rod 7;The scissor type lifting assembly 6 connects chassis 1 and lifting platform 3, and is driven by electric push rod 7;The electric push rod 7 includes motor 8, nut 9, inner tube 10, outer tube 11, screw rod 12, hall element 13, magnet 14 and collar support 15;The motor 8 is installed on the mounting seat of outer tube 11 side face, and output shaft is connected screw rod 12 by transmission mechanism;The screw rod 12 is connected with nut 9 by screw thread;The outer side wall of nut 9 is equipped with collar support 15, and top end is connected inner tube 10;The collar support 15 is installed between nut 9 and outer tube 11 inner wall, and is installed with hall element 13 and magnet 14 on top;Inner tube 10 side surface is equipped with the recess of installation signal line 16, and signal line 16 is connected with hall element 13;The bottom of outer tube 11 and the top of inner tube 10 are connected with scissor type lifting assembly 6.

[0017] Specifically, the hall element 3 is a kind of sensor based on Hall effect, and its working principle is that when current passes through hall element, if the normal direction of the plane where element exists magnetic field, then the two sides of hall element 13 will produce potential difference, this phenomenon is called Hall effect, and the potential difference produced is called Hall voltage, and its size is related to the current intensity of the current passing through hall element, magnetic field intensity and the characteristics of hall element itself;The magnet 14 can generate magnetic field, and is the important source of the detection of magnetic field change of hall element 13, and the pole distribution of magnet 14 determines the strength and direction of magnetic field, when magnet 14 approaches or moves away from hall element 13, or magnet 14 itself rotates, the magnetic field 14 environment where hall element 13 is located will change, and then cause the change of Hall voltage;When electric push rod 7 is retracted, inner tube 10 and nut 9 end face are close, and there is signal normal output between hall element 13 and magnet 14, when encountering block and abnormal situation, inner tube 10 is separated from nut 9 end face due to external force, and hall signal is terminated, at this time, electric push rod 7 is no longer retracted to reduce abnormal damage and safety accident.

[0018] According to another embodiment of the utility model, further include, the scissor type lifting assembly 6 includes support rod group one 17, support rod group two 18, support rod group three 19, support rod group four 20, rotation rod group one 21, rotation rod group two 22, support rod group one 17, support rod group two 18 are equipped with two groups respectively, and each group is crossly arranged, rotationally connected, and rotationally connected with the bottom frame 1 at the bottom, the top of each support rod group one 17 is connected with support rod group three 19 through rotation rod group one 21, and the top of each support rod group two 18 is connected with support rod group four 20 through rotation rod group two 22, support rod group three 19, support rod group four 20 top cross arrangement, rotationally connected, rotationally connected with the lifting platform 3 at the top.

[0019] According to another embodiment of the utility model, further include, the middle of two support rod group one 17 is equipped with positioning rod one 23, and the middle of two support rod group four 20 is equipped with positioning rod two 24, positioning rod one 23 and positioning rod two 24 are parallelly arranged, and the bottom of the outer tube 11 of electric push rod 7 is connected with positioning rod one 23, and the top of the inner tube 10 of electric push rod 7 is connected with positioning rod two 24.

[0020] According to another embodiment of the utility model, further include, the Hall element 13 is arranged directly above the magnet 14.

[0021] According to another embodiment of the utility model, further include, the outer thread is arranged at the top of the nut 9, and the inner thread of the inner wall of the inner tube 10 is matched with the outer thread.

[0022] According to another embodiment of the utility model, further include, the handle 4 includes handlebar 25 and guard rod 26, the bottom of guard rod 26 is installed on the bottom frame 1, the top is equipped with handlebar 25, and the middle is equipped with electric control box 27, the lifting button 28 is arranged on handlebar 25, and the electric control box 27 is electrically connected with the lifting button 28 and electric push rod 7.

[0023] Specific operation process, the lifting button 28 on the handle 4 transmits signals to the electric control box 27, the electric control box 27 drives the electric push rod 7 to work, and the lifting platform 3 is controlled to work up and down through the scissor type lifting assembly 6.

[0024] The above description is only illustrative but not restrictive for the utility model, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the appended claims, but all will fall within the protection scope of the utility model.

Claims

1. A push bar for a stroller, characterized by, The utility model provides a kind of lifting platform, including chassis (1), lifting device (2), lifting platform (3) and handle (4);The bottom of the chassis (1) is supported by pulley (5), and lifting platform (3) is connected by lifting device (2) in the middle, and handle (4) is equipped on side face;The lifting device (2) includes scissor type lifting assembly (6) and electric push rod (7);The scissor type lifting assembly (6) is connected chassis (1) and lifting platform (3), and is driven by electric push rod (7);The electric push rod (7) includes motor (8), nut (9), inner tube (10), outer tube (11), screw rod (12), hall element (13), magnet (14) and collar support (15);The motor (8) is installed on the mounting seat of outer tube (11) side face, and output shaft is connected screw rod (12) by transmission mechanism;The screw rod (12) is threadedly connected with nut (9);The outer side wall of the nut (9) is equipped with collar support (15), and top end connects inner tube (10);The collar support (15) is installed between the nut (9) and the inner wall of outer tube (11), and hall element (13) and magnet (14) are installed on it;The inner tube (10) side face is equipped with the recess of installing signal line (16), and the signal line (16) is connected with hall element (13);The bottom of outer tube (11) and the top of inner tube (10) are connected with scissor type lifting assembly (6).

2. The push bar for a lift cart of claim 1, wherein, The scissor type lifting assembly (6) includes support rod group one (17), support rod group two (18), support rod group three (19), support rod group four (20), rotating rod group one (21), rotating rod group two (22);Support rod group one (17) and support rod group two (18) are respectively equipped with two groups, and each group is cross arranged and rotationally connected, and bottom is rotationally connected with chassis (1);The top of each group of support rod group one (17) is rotationally connected with support rod group three (19) by rotating rod group one (21), and the top of each group of support rod group two (18) is connected with support rod group four (20) by rotating rod group two (22);Support rod group three (19) and support rod group four (20) are cross arranged and rotationally connected on top, and top is rotationally connected with lifting platform (3).

3. The push bar for a lift cart of claim 2, wherein, The middle of two groups of support rod group one (17) is equipped with positioning rod one (23), and the middle of two groups of support rod group four (20) is equipped with positioning rod two (24);Positioning rod one (23) and positioning rod two (24) are parallelly arranged, and the bottom of outer tube (11) of electric push rod (7) is connected with positioning rod one (23), and the top of inner tube (10) of electric push rod (7) is connected with positioning rod two (24).

4. The push bar for a lift cart of claim 1, wherein, The hall element (13) is arranged directly above the magnet (14).

5. The push bar for a lift cart of claim 1, wherein, The top of the nut (9) is equipped with external thread, and the internal thread of inner tube (10) inner wall is matched.

6. The push bar for a lift cart of claim 1, wherein, The handle (4) comprises a handlebar (25) and a protection rod (26), the bottom of the protection rod (26) is mounted on the chassis (1), the top of the protection rod (26) is provided with the handlebar (25), and the middle of the protection rod (26) is provided with an electric control box (27); the handlebar (25) is provided with a lifting button (28), and the electric control box (27) is electrically connected with the lifting button (28) and the electric push rod (7).

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