Steel coil lifting trolley

Abstract

The steel coil lifting trolley comprises a base, a C-shaped bracket, a guide assembly, a driving assembly and four wheel units, the driving assembly is connected between the C-shaped bracket and the base, the driving assembly is arranged in a telescopic mode in the vertical direction, the C-shaped bracket is provided with a counter bore, the base is provided with a through hole penetrating in the vertical direction, the guide assembly penetrates through the through hole, and the four wheel units are arranged on the guide assembly. Each wheel unit comprises a track wheel and a wheel axle, each wheel axle comprises a mounting part, a shaft shoulder part and a connecting part, each track wheel is rotatably arranged on the corresponding mounting part in a sleeving manner, a bearing hole is formed in the base, each connecting part is fixed in the corresponding bearing hole, each shaft shoulder part abuts against the position between the corresponding track wheel and the base, and each connecting part is fixed in the corresponding bearing hole. And the shaft shoulder part sinks inwards to form an annular groove. Therefore, a gap between the track wheel and the base can be small through the shaft shoulder part, deflection is reduced, the annular groove enables the end face of the outer ring to be stressed firstly when being extruded, the installation part cannot be directly acted, deflection force expansion is reduced, and damage to the wheel shaft is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel coil transportation, in particular to a steel coil lifting trolley. Background Art

[0002] The steel coil lifting trolley is a step-by-step mobile device for steel coils. Its workstation is located between the coil unloading trolley and the steel coil receiving device. It usually uses a C-type bracket to assemble the steel coil. Due to the thin structure of the C-type bracket and poor support stability, the instability of the C-type bracket will increase during transportation and when the guide rod is lifted, resulting in a small range of shaking during operation. The gap between the wheel and the end face of the structure is large, which will form a deflection load on the double-row cylindrical roller bearing of the track wheel, causing deflection, which will directly affect the bearing accuracy and shorten its service life, and the subsequent maintenance intensity is high.

[0003] In view of this, it is necessary to propose a steel coil lifting trolley to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0004] The main purpose of the utility model is to provide a steel coil lifting trolley to solve the problem in the prior art that the lifting trolley squeezes the bearing and easily causes the bearing to deflect, thereby affecting the accuracy.

[0005] To achieve the above-mentioned purpose, the utility model provides a steel coil lifting trolley, comprising a base, a C-shaped bracket, a guide assembly, a drive assembly and four wheel units distributed in a rectangular array; wherein,

[0006] The driving assembly is connected between the C-shaped bracket and the base, and the driving assembly is arranged to be telescopic in the vertical direction;

[0007] The C-shaped bracket is provided with a countersunk hole, the base is provided with a through hole extending vertically therethrough, the guide assembly passes through the through hole, and the top of the guide assembly is inserted into the countersunk hole;

[0008] Each wheel unit includes a rail wheel and a wheel axle, and the wheel axle includes a mounting portion, a shoulder portion, and a connecting portion. The rail wheel is rotatably mounted on the mounting portion. A bearing hole is provided on the base, and the connecting portion is fixed in the bearing hole. The shoulder portion is supported between the rail wheel and the base, and the side of the shoulder portion close to the rail wheel is recessed inward to form an annular groove.

[0009] Preferably, the outer diameter of the shoulder portion is larger than the outer diameter of the mounting portion and the outer diameter of the connecting portion.

[0010] Preferably, the bearing hole is a tapered hole whose diameter gradually decreases toward the inside, and the connecting portion is in a frustum shape matching the tapered hole.

[0011] Preferably, the base is protruded upward to form four legs distributed in a rectangular array, each of the legs is provided with a bearing hole, and the wheel axle is inserted into the bearing hole through the connecting portion to be connected to the legs.

[0012] Preferably, each of the wheel units further includes a pressure plate, on which a first bolt hole and a second bolt hole are provided, a first blind hole corresponding to the first bolt hole is provided on the connecting portion, and a second blind hole corresponding to the second bolt hole is provided on the support leg, wherein the connecting portion passes through the first bolt hole and extends into the first blind hole through a bolt to be fixedly connected to the pressure plate, and the pressure plate passes through the second bolt hole and extends into the second blind hole through a bolt to be fixedly connected to the support leg.

[0013] Preferably, the pressure plate is further provided with a push rod hole, and the push rod hole is arranged coaxially with the bearing hole.

[0014] Preferably, the guide assembly includes two guide rods spaced apart in the longitudinal direction, the guide rods pass through the through hole, and the tops of the guide rods are inserted into the countersunk holes and fixedly connected to the C-shaped bracket by bolts.

[0015] Preferably, the tapered surface of the tapered hole has an inclination angle of 5° to 10°.

[0016] Preferably, the driving assembly adopts a lifting cylinder.

[0017] Preferably, it further comprises an ear plate, which is protruding from the front end of the base.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The utility model provides a steel coil lifting trolley, comprising a base, a C-shaped bracket, a guide assembly, a drive assembly and four wheel units distributed in a rectangular array. The drive assembly is connected between the C-shaped bracket and the base, and the drive assembly is telescopically arranged vertically. The C-shaped bracket is provided with a countersunk hole, the base is provided with a through hole penetrating vertically, the guide assembly passes through the through hole, and the top of the guide assembly is inserted into the countersunk hole. Each wheel unit includes a rail wheel and a wheel axle. The wheel axle includes a mounting portion, a shoulder portion and a connecting portion. The rail wheel is rotatably mounted on the mounting portion. A bearing hole is provided on the base, the connecting portion is fixed in the bearing hole, the shoulder portion is supported between the rail wheel and the base, and the shoulder portion is recessed inward on the side close to the rail wheel to form an annular groove. In this way, by setting the shaft shoulder, a very small gap can be maintained between the rail wheel and the base, reducing deflection. By setting the annular groove, the outer ring end face is first subjected to force when squeezed, and will not directly act on the mounting part of the wheel axle, reducing the expansion of the deflection force, thereby reducing damage to the wheel axle, extending the service life, and reducing later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 A three-dimensional schematic diagram of an application scenario of the overall structure in one embodiment of the present utility model;

[0022] Figure 2 A schematic longitudinal section diagram of an application scenario of the overall structure in one embodiment of the present utility model;

[0023] Figure 3 This is an exploded schematic diagram of a wheel unit in one embodiment of the present invention;

[0024] Figure 4 A cross-sectional schematic diagram of an application scenario of the overall structure in one embodiment of the present utility model;

[0025] Figure 5 Schematic cross-section of a wheel axle in one embodiment of the present invention;

[0026] Figure 6 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0028] Description of Figure Numbers:

[0029] 10. Wheel unit; 110. Track wheel; 120. Wheel axle; 121. Mounting portion; 122. Shaft shoulder; 1221. Annular groove; 123. Connecting portion; 130. Pressing plate; 131. First bolt hole; 132. Second bolt hole; 133. Push rod hole; 20. Base; 210. Through hole; 220. Support leg; 221. Bearing hole; 230. Ear plate; 30. C-type bracket; 310. Countersunk hole; 40. Guide assembly; 410. Guide rod; 50. Drive assembly. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

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

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] Please see the attached Figure 1-6In one embodiment of the present invention, a steel coil lifting trolley is provided, comprising a base 20, a C-shaped bracket 30, a guide assembly 40, a drive assembly 50 and four wheel units 10 distributed in a rectangular array. First of all, it should be noted that the longitudinal direction in this application refers to the direction of movement of the trolley; and different from the instability of the C-shaped bracket 30 in the prior art, which causes a small range of shaking during operation, the large gap between the wheel and the end face of the structure will cause a deflection load to be formed on the double-row cylindrical roller bearing of the track wheel 110, resulting in deflection, which will directly affect the bearing accuracy and shorten its service life, and the subsequent maintenance intensity is high. The present application solves the above-mentioned defects in the prior art by providing a steel coil lifting trolley, which is specifically as follows:

[0035] The driving assembly 50 is connected between the C-shaped bracket 30 and the base 20, and the driving assembly 50 is arranged to be telescopic in the vertical direction; the C-shaped bracket 30 is provided with a countersunk hole 310, and the base 20 is provided with a through hole 210 that passes through vertically, the guide assembly 40 passes through the through hole 210, and the top of the guide assembly 40 is inserted into the countersunk hole 310; each of the wheel units 10 includes a track wheel 110 and a wheel shaft 120, and the wheel unit 10 includes a track wheel 110 and a wheel shaft 120. The axle 120 includes a mounting portion 121, a shoulder portion 122 and a connecting portion 123. The track wheel 110 is rotatably mounted on the mounting portion 121. A bearing hole 221 is provided on the base 20. The connecting portion 123 is fixed in the bearing hole 221. The shoulder portion 122 is supported between the track wheel 110 and the base 20, and the side of the shoulder portion 122 close to the track wheel 110 is recessed inward to form an annular groove 1221.

[0036] Specifically, the steel coil lifting trolley in the present application includes a base 20, a C-shaped bracket 30, a guide assembly 40, a drive assembly 50 and four wheel units 10. The base 20 is used for installing other components of the trolley. The C-shaped bracket 30 is an existing structure for assembling steel coils. The drive assembly 50 is vertically retractable to drive the steel coils in the C-shaped bracket 30 to rise and fall. Therefore, the drive assembly 50 is connected between the C-shaped bracket 30 and the base 20. In a preferred embodiment of the present application, the drive assembly 50 can adopt a lifting cylinder, which is easy to drive and has sufficient driving force. Those skilled in the art can also choose other drive cylinders as needed; and the guide assembly 40 is used to limit and guide the moving direction of the C-shaped bracket 30 to further improve the C-shaped bracket 30 in the rising and lowering adjustment. In order to improve the stability of the joint, a through hole 210 is provided on the base 20 for the guide assembly 40 to pass through and install, and a countersunk hole 310 is provided on the C-type bracket 30 to facilitate the connection between the C-type bracket 30 and the guide assembly 40. When setting, the through hole 210 and the countersunk hole 310 need to be set along the vertical coaxial centerline to ensure the limiting guiding effect. In this way, under the cooperation of the through hole 210 and the countersunk hole 310, when the guide assembly 40 follows the C-type bracket 30 to move up and down, it moves along the through hole 210, the displacement stroke will not deviate and the process structure stability is good, which makes up for the disadvantage of partial shaking when the C-type bracket 30 moves; the four wheel units 10 are used as components for the entire trolley to move along the track of the production line. The four wheel units 10 are distributed in a rectangular array to ensure the movement balance of the trolley.

[0037] Among them, each wheel unit 10 includes a track wheel 110 and a wheel axle 120. The track wheel 110 is a wheel that travels and rotates on the track, and the wheel axle 120 is used for installing the track wheel 110. It includes a mounting portion 121, a shoulder portion 122 and a connecting portion 123. The mounting portion 121 is used for rotatably installing the track wheel 110, and the connecting portion 123 is used to install and connect the entire wheel axle 120 to the base 20. This application adds the shoulder portion 122 between the mounting portion 121 and the connecting portion 123 to protect the central bearing portion of the entire wheel axle 120, which abuts between the track wheel 110 and the base 20 to fill the gap between the two. In order to reduce the squeezing force on the bearing when it is squeezed, the shoulder portion 122 is also recessed inward on the side close to the track wheel 110 to form an annular groove 1221, so that the entire shoulder portion 122 is hollowed out from the outer end to the center bearing to form an annular end face. When the steel coil is lifted and shakes, the original direct contact with the center bearing (mounting portion 121, connecting portion 123) is changed to direct contact with the annular end face to form a line contact, so that it will not directly act on the center bearing (mounting portion 121, connecting portion 123), so as to reduce the further expansion of the deflection, thereby reducing damage to the center bearing and saving materials. It is different from the existing cylindrical roller bearings in that it has more comprehensive protection, changes the force surface and force distribution form, and extends the service life.

[0038] It is worth mentioning that the track wheel 110 on the same side can be provided with a wheel flange, while the track wheel 110 on the other side can be not provided with a wheel flange. Since the entire structure is formed as a whole, its axial positioning can be achieved through the wheel flange on one side. At the same time, it can adapt to the flange top rail caused by thermal expansion and contraction of the system, so there is no need to provide wheel flanges on both sides, thereby avoiding over-positioning.

[0039] As a preferred embodiment of the present invention, the outer diameter of the shoulder portion 122 is larger than the outer diameter of the mounting portion 121 and the outer diameter of the connecting portion 123 .

[0040] It should be noted that the outer diameter of the shoulder portion 122 is larger than the outer diameters of the mounting portion 121 and the connecting portion 123, so that the deflection load finally acting on the mounting portion 121 and the connecting portion 123 becomes smaller, thereby further reducing the damage to the center bearing (the mounting portion 121 and the connecting portion 123).

[0041] As a preferred embodiment of the present invention, the bearing hole 221 is a tapered hole with a diameter gradually decreasing toward the inside, and the connecting portion 123 is in a frustum shape matching the tapered hole.

[0042] It should be noted that the cooperation between the tapered hole and the frustum cross-section connecting portion 123 makes it easy to assemble and disassemble the wheel axle 120 during installation, and it is more convenient to align the axis centerline during replacement without offset, making replacement faster.

[0043] As a preferred embodiment of the present invention, the base 20 is protruded upward to form four legs 220 distributed in a rectangular array, each leg 220 is provided with a bearing hole 221, and the wheel axle 120 is inserted into the bearing hole 221 through the connecting portion 123 to be connected to the leg 220.

[0044] It is worth noting that the protruding support leg 220 can make it easier for the wheel unit 10 to be installed accordingly, so that each support leg 220 is correspondingly installed with a wheel unit 10. By opening the bearing hole 221 on the support leg 220, the connecting part 123 of the wheel shaft 120 can be connected to the support leg 220.

[0045] As a preferred embodiment of the present invention, each wheel unit 10 further includes a pressure plate 130, which is provided with a first bolt hole 131 and a second bolt hole 132, and the connecting portion 123 is provided with a first blind hole corresponding to the first bolt hole 131, and the support leg 220 is provided with a second blind hole corresponding to the second bolt hole 132, wherein the connecting portion 123 is bolted through the first bolt hole 131 and extends into the first blind hole to be fixedly connected to the pressure plate 130, and the pressure plate 130 is bolted through the second bolt hole 132 and extends into the second blind hole to be fixedly connected to the support leg 220.

[0046] It is worth noting that the pressure plate 130 is used to fix the connection portion 123 and the support leg 220, wherein the first bolt hole 131 is used to fix the connection portion 123 of the wheel shaft 120 and the pressure plate 130, and a first blind hole corresponding to the first bolt hole 131 is opened on the connection portion 123, so as to be fixed by bolt connection. Here, the corresponding setting means that the first blind hole and the first bolt hole 131 have the same size and number and are arranged on the axis; and the second bolt hole 132 of the pressure plate 130 is used to fix the connection portion 123 of the wheel shaft 120 and the pressure plate 130. The pressure plate 130 and the support leg 220 are fixedly connected, and are fixed by bolting by providing a second blind hole corresponding to the second bolt hole 132 on the support leg 220. The corresponding setting here means that the second blind hole and the second bolt hole 132 have the same size and number and are coaxially arranged; in this way, the second bolt hole 132 is located on both sides of the first bolt hole 131, and the pressure plate 130, the connecting portion 123 of the wheel axle 120 and the support leg 220 are fixedly connected to each other to ensure the installation connection stability of the connecting portion 123.

[0047] Furthermore, a push rod hole 133 is formed on the pressing plate 130 , and the push rod hole 133 is coaxial with the bearing hole 221 .

[0048] It should be noted that the push rod hole 133 is used when disassembling and replacing the wheel unit 10. A push rod can be passed through the push rod hole 133 to push out the wheel unit 10, which makes disassembly and assembly very convenient and saves time and effort. Pushing from the axis is faster, so it is better to set the push rod hole 133 and the bearing hole 221 coaxially.

[0049] Furthermore, the guide assembly 40 includes two guide rods 410 spaced apart in the longitudinal direction, the guide rods 410 pass through the through hole 210, and the top of the guide rods 410 is inserted into the countersunk hole 310 and fixedly connected to the C-shaped bracket 30 by bolts.

[0050] It should be understood that providing two guide rods 410 relatively arranged on both sides of the drive assembly 50 can make the guiding effect of the entire C-type bracket 30 more balanced, and further make the lifting stability of the C-type bracket 30 better; wherein, when connecting the guide rod 410 and the C-type bracket 30, a plurality of holes distributed in a plum blossom shape can be opened on the upper part of the C-type bracket 30 for fixing the C-type bracket 30 and the top of the guide rod 410 with bolts.

[0051] Furthermore, the inclination angle of the conical surface of the conical hole is 5° to 10°.

[0052] It should be noted that the size of the inclination angle of the conical surface can affect the convenience of installing the connecting part 123. In this application as a preferred embodiment, the inclination angle of the conical surface of the conical hole can be set to 7°, and those skilled in the art can choose according to specific needs.

[0053] Furthermore, it also includes an ear plate 230 , which is protruded from the front end of the base 20 .

[0054] It can be understood that the ear plate 230 is used for connecting to the oil cylinder that pulls the trolley to move, so it is protruded from the front end of the base 20, where the front end refers to the end facing the direction of travel of the trolley.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steel coil lifting trolley, characterized in that: It includes a base, a C-shaped bracket, a guide assembly, a drive assembly and four wheel units distributed in a rectangular array; among them, The driving assembly is connected between the C-shaped bracket and the base, and the driving assembly is arranged to be telescopic in the vertical direction; The C-shaped bracket is provided with a countersunk hole, the base is provided with a through hole extending vertically therethrough, the guide assembly passes through the through hole, and the top of the guide assembly is inserted into the countersunk hole; Each wheel unit includes a rail wheel and a wheel axle, and the wheel axle includes a mounting portion, a shoulder portion, and a connecting portion. The rail wheel is rotatably mounted on the mounting portion. A bearing hole is provided on the base, and the connecting portion is fixed in the bearing hole. The shoulder portion is supported between the rail wheel and the base, and the side of the shoulder portion close to the rail wheel is recessed inward to form an annular groove.

2. The steel coil lifting trolley according to claim 1, characterized in that: The outer diameter of the shoulder portion is larger than the outer diameter of the mounting portion and the outer diameter of the connecting portion.

3. The steel coil lifting trolley according to claim 1, characterized in that: The bearing hole is a tapered hole with a diameter gradually decreasing toward the inside, and the connecting portion is in a frustum shape matching the tapered hole.

4. The steel coil lifting trolley according to claim 3, characterized in that: The base is protruded upward to form four legs distributed in a rectangular array, each of the legs is provided with a bearing hole, and the wheel axle is inserted into the bearing hole through the connecting portion to be connected to the legs.

5. The steel coil lifting trolley according to claim 4, characterized in that: Each wheel unit further includes a pressure plate, on which a first bolt hole and a second bolt hole are provided, a first blind hole corresponding to the first bolt hole is provided on the connecting portion, and a second blind hole corresponding to the second bolt hole is provided on the supporting leg, wherein the connecting portion passes through the first bolt hole and extends into the first blind hole via a bolt to be fixedly connected to the pressure plate, and the pressure plate passes through the second bolt hole and extends into the second blind hole via a bolt to be fixedly connected to the supporting leg.

6. The steel coil lifting trolley according to claim 5, characterized in that: The pressure plate is also provided with a push rod hole, and the push rod hole is arranged coaxially with the bearing hole.

7. The steel coil lifting trolley according to claim 1, characterized in that: The guide assembly includes two guide rods spaced apart in the longitudinal direction, the guide rods pass through the through hole, and the tops of the guide rods are inserted into the countersunk holes and fixedly connected to the C-shaped brackets by bolts.

8. The steel coil lifting trolley according to claim 3, characterized in that: The tapered hole has a tapered surface with an inclination angle of 5° to 10°.

9. The steel coil lifting trolley according to claim 1, characterized in that: The driving assembly adopts a lifting cylinder.

10. The steel coil lifting trolley according to claim 1, characterized in that: It also includes an ear plate, which is protruding from the front end of the base.

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