Lifting trolley

Abstract

According to the liftable trolley, a through hole is formed in a carrying platform of the trolley, a bottom plate is arranged in the through hole, a liftable device is arranged between the bottom plate and the carrying platform, and the upper side of the bottom plate is connected with a panel correspondingly matched with the through hole. In the lifting device, a left-handed screw rod and a right-handed screw rod which are rotationally connected with the object carrying platform drive a right-handed nut shaft and a left-handed nut shaft which are arranged on the screw rod to move axially, so that a connecting block connected with the right-handed nut shaft and the left-handed nut shaft rotates on a vertical plane, a bottom plate connected with the connecting block is driven to move upwards or downwards, and a panel ascends and descends along with the bottom plate; the function that transported objects are lifted upwards or objects at high positions are supported and placed on the trolley in a descending mode is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of transportation equipment, and in particular relates to a liftable trolley. Background Art

[0002] In work environments such as construction sites, trolleys are usually needed to transport materials and tools. The trolleys currently used only have the function of horizontal transportation but no lifting function. When the transported items need to be lifted upward, other tools or manpower are often needed. For example, when moving the receiving tank to connect with the discharge port on the lower side of the ball mill body, the tank mouth of the receiving tank is often a distance away from the discharge port. At this time, two people are required to cooperate in the operation. One person moves the receiving tank upward and keeps it still, and the other person docks and fixes the connecting tank and the discharge port. After the receiving operation is completed, two people are also required to cooperate in disassembling the receiving tank and then moving the receiving tank out from the lower side of the ball mill body. The whole process is relatively inconvenient. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a liftable trolley, so that the trolley has a lifting function while having a translational transportation function, so as to lift the transported items or place the items at a high place onto the trolley.

[0004] The liftable trolley disclosed in the present application comprises a loading platform, a plurality of wheels and a handrail, wherein the lower end of the handrail is connected to the side of the loading platform, and the wheel is rotatably connected to the lower side of the loading platform, and is characterized in that a through hole is provided on the loading platform, a bottom plate is provided in the through hole, and a liftable device for driving the bottom plate to lift up and down is provided on the loading platform;

[0005] The lifting device comprises two bearing seats, two bearings, a left-handed screw rod, a right-handed nut shaft, a left-handed nut shaft and two connecting blocks;

[0006] The bearing seats are respectively connected to two opposite sides of the loading platform;

[0007] The bearings are matched and correspondingly connected with the bearing seats respectively;

[0008] Both ends of the left and right screw rods are rotatably connected to corresponding bearings respectively;

[0009] A right-handed nut shaft is threadedly mounted on the right-handed thread of the left-handed screw rod and moves along the left-handed screw rod;

[0010] A left-handed nut shaft is threadedly mounted on the left-handed thread of the left-handed screw rod and moves along the left-handed screw rod;

[0011] The right-handed nut shaft and the left-handed nut shaft are both provided with round shafts at the front and rear ends, and the round shafts are respectively connected to one end of the corresponding connecting block;

[0012] The other end of the connecting block is connected to the left and right ends of the bottom plate.

[0013] Furthermore, a panel is connected to the upper side of the bottom plate, and the panel corresponds to and matches the through holes.

[0014] Furthermore, the loading platform is provided with a limiting member, one end of the limiting member is connected to the loading platform, and the other end of the limiting member is away from the loading platform; the inner side surface of the limiting member coincides with the projection of the edge of the through hole.

[0015] Furthermore, the liftable device further comprises two guide grooves;

[0016] The guide groove is arranged in parallel on the lower side of the loading platform;

[0017] The circular shafts at the front and rear ends of the right-handed nut shaft and the left-handed nut shaft are respectively in contact with the corresponding guide grooves to limit the rotation of the right-handed nut shaft and the left-handed nut shaft.

[0018] Furthermore, one end of the left and right rotating screw rods is provided with a handheld component for controlling the rotation of the left and right rotating screw rods.

[0019] Furthermore, the bottom plate includes an inverted U-shaped bent plate.

[0020] Furthermore, the handheld component is one of a handle, a handwheel or a clevis nut.

[0021] Furthermore, the connection structure between the armrest and the loading platform is hinged.

[0022] This application has the following beneficial effects:

[0023] The liftable trolley of the present application has a through hole on the loading platform, a bottom plate is arranged in the through hole, a liftable device is arranged between the bottom plate and the loading platform, and the upper side of the bottom plate is connected to a panel corresponding to the through hole. The left-right screw rods rotatably connected to the loading platform in the lifting device drive the right-handed nut shaft and the left-handed nut shaft arranged on the screw rod to move axially, so that the connecting block connected to the right-handed nut shaft and the left-handed nut shaft rotates on the vertical plane, driving the bottom plate connected to the connecting block to move upward or downward, so that the panel is lifted up and down with the bottom plate, realizing the function of lifting the transported items upward or placing the items at a high place and then lowering them to be placed on the trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an overall schematic diagram of a liftable trolley provided in the present application,

[0025] Figure 2 is an exploded view of the liftable trolley provided in this application,

[0026] Figure 3 is a front cross-sectional view of the liftable trolley provided by the present application,

[0027] Figure 4 It is a schematic diagram of the rising state of the liftable trolley provided by the present application.

[0028] Description of reference numerals:

[0029] 1. Bearing seat, 2. Bearing, 3. Left-handed screw, 4. Loading platform, 5. Right-handed nut shaft, 6. Left-handed nut shaft, 7. Bearing seat end cover, 8. Pressure plate, 9. Screw, 10. Handheld component, 11. Pin shaft, 12. Connecting block, 13. Base plate, 14. Panel. DETAILED DESCRIPTION

[0030] In order to more clearly and completely describe the technical solution of the present application, the present application is further described in detail through specific embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Various changes can be made within the scope of the rights specified in the present application.

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] like Figure 1 and Figure 2As shown, the present application provides a liftable trolley, which includes a loading platform 4, a plurality of wheels and a handrail, wherein the lower end of the handrail is connected to the side of the loading platform 4, the wheel is rotatably connected to the lower side of the loading platform 4, and a through hole is opened on the loading platform 4. A bottom plate 13 is arranged in the through hole, and a liftable device for driving the bottom plate 13 to lift up and down is arranged on the loading platform 4.

[0034] like Figure 2 and Figure 3 As shown, the lifting device includes two bearing seats 1, two bearings 2, left and right screw rods 3, right-handed nut shaft 5, left-handed nut shaft 6 and two connecting blocks 12; the bearing seats 1 are respectively connected to the left and right sides of the loading platform 4; the bearings 2 are respectively matched and connected with the bearing seats 1; the two ends of the left and right screw rods 3 are respectively rotatably connected with the bearings 2; one end of the left and right screw rods 3 is provided with a hand-held component 10 for controlling the rotation of the left and right screw rods 3, and the hand-held component 10 includes a handle, a handwheel or a horn nut.

[0035] A right-handed nut shaft 5 is threadedly mounted on the right-handed thread of the left-handed screw rod 3, and a left-handed nut shaft 6 is threadedly mounted on the left-handed thread of the left-handed screw rod 3. The right-handed nut shaft 5 and the left-handed nut shaft 6 move axially along the left-handed screw rod 3; the right-handed nut shaft 5 and the left-handed nut shaft 6 are respectively connected to the left and right ends of the base plate 13 through two connecting blocks 12, and the right-handed nut shaft 5 and the left-handed nut shaft 6 correspond to the connecting blocks 12 one by one, and round shafts are provided at the front and rear ends of the right-handed nut shaft 5 and the left-handed nut shaft 6, which are respectively connected to one end of the connecting block 12 corresponding to the right-handed nut shaft 5 and the left-handed nut shaft 6; the other end of the connecting block 12 is connected to the base plate 13.

[0036] In some embodiments disclosed in the present application, the loading platform 4 is provided with a limiter, one end of the limiter is connected to the loading platform 4, and the other end of the limiter is away from the loading platform; the inner side surface of the limiter coincides with the projection of the edge of the through hole. The bottom plate 13 is vertically lifted and lowered along the inner side surface of the limiter under the control of the lifting device.

[0037] In some embodiments disclosed in the present application, the connection structure between the armrest and the loading platform 4 is hinged.

[0038] In some embodiments disclosed in the present application, the bearing seat 1 is respectively connected to the front and rear sides of the loading platform 4.

[0039] In some embodiments disclosed in the present application, the lifting device also includes two guide grooves; the guide grooves are arranged in parallel on the lower side of the loading platform 4; the circular shafts at the front and rear ends of the right-handed nut shaft 5 and the left-handed nut shaft 6 are respectively abutted against the guide grooves to limit the rotation of the right-handed nut shaft (5) and the left-handed nut shaft (6).

[0040] In some embodiments disclosed in the present application, the bottom plate 13 is an inverted U-shaped bent plate. The top of the bottom plate 13 is connected to the panel 14, and the connection panel 14 is matched with the through hole.

[0041] Example 1

[0042] A liftable trolley includes a loading platform 4, four wheels and handrails. The lower end of the handrail is connected to the side of the loading platform 4. The four wheels are rotatably connected to the lower side of the loading platform 4. A circular through hole is opened on the loading platform 4. A cylinder is connected to the upper side of the loading platform 4 as a stopper. The cylinder is equal in size from top to bottom. The bottom edge of the lower end of the cylinder is welded and fixed along the circumference of the through hole. The inner side of the cylinder coincides with the projection of the circumference of the through hole. A bottom plate 13 is arranged in the through hole. A liftable device is arranged between the bottom plate 13 and the loading platform 4 so that the bottom plate 13 in the through hole can be stably lifted and lowered in the vertical direction along the inner side of the cylinder. In this embodiment, the bottom plate 13 is an inverted U-shaped bent plate. Four screw holes are opened on the plane of the bottom plate 13. A panel 14 is placed on the upper side of the bottom plate 13. The panel 14 is fixedly mounted on the bottom plate 13 by screws so that the panel 14 moves up and down with the bottom plate 13. The shape of the panel 14 corresponds to the through hole.

[0043] The lifting device includes two bearing seats 1, two bearings 2, left and right screw rods 3, right-handed nut shaft 5, left-handed nut shaft 6 and two connecting blocks 12; the right bearing seat 1 is welded to the right side of the loading platform 4, and the other bearing seat 1 is fixed on the left side opposite to the loading platform 4 by screws, and a bearing seat end cover plate 7 is installed on the left side of the left bearing seat 1; the bearings 2 on the left and right sides are respectively matched and connected with the bearing seats 1; the two ends of the left and right screw rods 3 are respectively rotatably connected with the bearings 2; one end of the left and right screw rods 3 connected to the left bearing seat 1 is provided with a handwheel for controlling the rotation of the left and right screw rods 3, and the screw 9 passes through the pressure plate 8 and the handwheel 10 to fix the handwheel to the left end of the left and right screw rods 3.

[0044] A right-handed nut shaft 5 is threadedly sleeved on the right-handed thread of the left-handed screw rod 3; a left-handed nut shaft 6 is threadedly sleeved on the left-handed thread of the left-handed screw rod 3; the round shafts at the front and rear ends of the right-handed nut shaft 5 and the left-handed nut shaft 6 are respectively connected to one end of the connecting block 12 through connecting members such as screws or bolts; the other end of the connecting block 12 is connected to the bottom plate 13 through a pin shaft 11, and the pin shaft 11 is fixed by an elastic retaining ring. The round shafts at both ends of the right-handed nut shaft 5 and the left-handed nut shaft 6 are abutted against the guide grooves on the lower side of the loading platform 4 to limit the rotation of the right-handed nut shaft 5 and the left-handed nut shaft 6.

[0045] The specific operation process is as follows: when the hand wheel 10 is rotated, the hand wheel 10 drives the left and right screw rods 3 to rotate, and the circular shafts at both ends of the right-handed nut shaft 5 and the left-handed nut shaft 6 on the left and right screw rods 3 abut against the guide grooves on the lower side of the loading platform 4, and the left-handed nut shaft 6 and the right-handed nut shaft 5 move toward or away from each other along the axial direction of the left and right screw rods 3. The connecting blocks 12 connected to the circular shafts at the front and rear ends of the left-handed nut shaft 6 and the right-handed nut shaft 5 rotate around the circular shafts of the left-handed nut shaft 6 and the right-handed nut shaft 5 respectively, and the connecting blocks 12 rotating along the axial direction of the left and right screw rods 3 drive the bottom plate 13 connected thereto to move vertically up and down along the inner side of the cylinder on the loading platform 4, and the panel 14 fixedly connected to the bottom plate rises and falls at the through hole of the loading platform 4 accordingly, realizing the function of lifting the transported items upward or placing the items at a high place and then lowering them to be placed on the trolley. The rising state of the liftable trolley is shown in FIG. Figure 4 shown.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A liftable trolley, comprising a loading platform (4), a plurality of wheels and handrails, wherein the lower end of the handrails is connected to the side of the loading platform (4), and the wheels are rotatably connected to the lower side of the loading platform (4), characterized in that: The loading platform (4) is provided with a through hole, a bottom plate (13) is arranged in the through hole, and a lifting device for driving the bottom plate (13) to move up and down is provided on the loading platform (4); The lifting device comprises two bearing seats (1), two bearings (2), left-handed and right-handed screw rods (3), right-handed nut shafts (5), left-handed nut shafts (6) and two connecting blocks (12); The bearing seats (1) are respectively connected to two opposite sides of the loading platform (4); The bearings (2) are matched and correspondingly connected to the bearing seats (1) respectively; Both ends of the left and right screw rods (3) are rotatably connected to corresponding bearings (2) respectively; A right-handed nut shaft (5) is threadedly mounted on the right-handed thread of the left-handed screw rod (3) and moves along the left-handed screw rod (3); A left-handed nut shaft (6) is threadedly mounted on the left-handed thread of the left-handed screw rod (3) and moves along the left-handed screw rod (3); The right-handed nut shaft (5) and the left-handed nut shaft (6) are both provided with round shafts at both ends, and the round shafts are respectively connected to one end of the corresponding connecting block (12); The other end of the connecting block (12) is connected to the left and right ends of the bottom plate (13).

2. The liftable trolley according to claim 1, characterized in that: A panel (14) is connected to the upper side of the bottom plate (13), and the panel (14) corresponds to and matches the through hole.

3. The liftable trolley according to claim 2, characterized in that: The loading platform (4) is provided with a limiting member, one end of which is connected to the loading platform (4) and the other end of which is away from the loading platform (4); the inner side surface of the limiting member coincides with the projection of the through hole.

4. The liftable trolley according to claim 1, characterized in that: The liftable device further comprises two guide grooves; The guide groove is arranged in parallel on the lower side of the loading platform (4); The circular shafts at the front and rear ends of the right-handed nut shaft (5) and the left-handed nut shaft (6) are respectively in contact with the guide grooves to limit the rotation of the right-handed nut shaft (5) and the left-handed nut shaft (6).

5. The liftable trolley according to claim 1, characterized in that: One end of the left-right screw rod (3) is provided with a hand-held component (10) for controlling the rotation of the left-right screw rod (3).

6. The liftable trolley according to claim 1, characterized in that: The bottom plate (13) comprises an inverted U-shaped bent plate.

7. The liftable trolley according to claim 5, characterized in that: The handheld component (10) is one of a handle, a hand wheel or a clevis nut.

8. The liftable trolley according to claim 1, characterized in that: The connection structure between the armrest and the loading platform (4) is hinged.

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