Height-adjustable trundle device for low rack

Abstract

The utility model discloses a height-adjustable trundle device for a low rack. The height-adjustable trundle device comprises the rack and two pairs of trundle mechanisms, the two pairs of trundle mechanisms are installed on the two sides of the rack and each comprise a support, a connecting plate is fixed to one side of the support and fixed to the side wall of the rack, an adjusting shaft is arranged in the support in an up-down sliding mode, the bottom end of the adjusting shaft is connected with a supporting plate, the adjusting shaft is arranged between the support and the supporting plate and provided with a threaded section, and the threaded section is in threaded connection with a nut. Moving wheels are installed at the bottom of the supporting plate, an installation sleeve is fixed to the supporting plate, the end, close to the supporting plate, of the adjusting shaft is inserted into the installation sleeve, a third bolt is arranged between the supporting plate and the adjusting shaft, a locking groove is formed in the support, a locking piece is arranged on the locking groove, and a second bolt is installed between the locking piece and the adjusting shaft. And a second screw hole matched with the second bolt is formed in the adjusting shaft. Through the relevant structural design, the height of the machine frame can be effectively adjusted according to actual use requirements.

Description

Technical Field

[0001] This utility model belongs to the field of industrial caster technology, specifically relating to an adjustable height caster device for low-profile machine frames. Background Technology

[0002] Composite material (prepreg) production equipment has a complex structure with multiple winding and unwinding structures. Each winding and unwinding structure requires the material rolls to be lifted by a gantry crane. In order to ensure that the gantry crane can lift the material rolls normally in the multi-layer structure, the winding and unwinding frame of the winding and unwinding layer needs to be moved out of the production equipment. The movement of the winding and unwinding frame needs to be achieved by casters.

[0003] Most existing rack casters are directly fixed to the bottom of the rack, which does not allow for height adjustment. Professional height-adjustable casters do have height adjustment capabilities, but their swivel caster structure is not conducive to rack positioning, and professional height-adjustable casters require a higher installation height for the same load.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an adjustable height caster device for low-profile frames.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable height caster device for low-profile machine frames, which can solve the problem that existing machine frame casters cannot be height adjusted.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides an adjustable height caster device for a low-profile frame, comprising: a frame and two pairs of caster mechanisms;

[0008] The two pairs of caster mechanisms are installed on both sides of the frame. Each pair of caster mechanisms includes a support. A connecting plate is fixed to one side of the support and the connecting plate is fixed to the side wall of the frame. An adjusting shaft is slidably arranged inside the support. A support plate is connected to the bottom end of the adjusting shaft. A threaded section is provided between the supporting shaft and the support plate. A nut is threaded onto the threaded section. A movable wheel is installed at the bottom of the support plate. An installation sleeve is fixed on the support plate. The end of the adjusting shaft near the support plate is inserted into the installation sleeve. A third bolt is provided between the support plate and the adjusting shaft. A locking groove is chiseled on the supporting shaft. A locking element is provided on the locking groove. A second bolt is installed between the locking element and the adjusting shaft. A second threaded hole adapted to the second bolt is chiseled on the adjusting shaft.

[0009] In one or more embodiments of this utility model, a T-shaped slot is chiseled on the connecting plate, and a T-shaped block that matches the T-shaped slot is fixed on the side wall of the frame. When the caster mechanism is installed on the side wall of the frame, the pre-installation between the frame and the caster mechanism is completed by inserting the T-shaped block into the T-shaped slot. At the same time, the first screw hole on the connecting plate and the frame corresponds to each other, which facilitates the subsequent quick screwing of the first bolt into the first screw hole.

[0010] In one or more embodiments of this utility model, multiple pairs of corresponding first screw holes are drilled on the connecting plate and the side wall of the frame. A first bolt is tightened in the first screw hole. The frame and the caster mechanism are fixed by tightening the first bolt in the first screw hole.

[0011] In one or more embodiments of this utility model, a first keyway is chiseled on the side wall of the adjusting shaft near the top end, and a first flat key is installed in the first keyway. By setting the first flat key, rotation between the adjusting shaft and the support is prevented. By setting the first flat key near the top end of the adjusting shaft, the first flat key can still be placed in the first sliding groove after the support is raised to a certain position.

[0012] In one or more embodiments of this utility model, the side wall of the support is provided with a first sliding groove through the top and bottom. The end of the first flat key located outside the adjusting shaft slides in the first sliding groove. By sliding the first flat key in the first sliding groove, the adjusting shaft and the support can only slide up and down and cannot rotate.

[0013] In one or more embodiments of this utility model, a second keyway is chiseled on the side wall of the adjusting shaft near the bottom end, and a second flat key is installed in the second keyway. By setting the second flat key, rotation between the adjusting shaft and the support plate is prevented.

[0014] In one or more embodiments of this utility model, a second sliding groove is chiseled on the inner wall of the mounting sleeve, and the second flat key slides in the second sliding groove. By sliding the second flat key in the second sliding groove, the adjusting shaft and the mounting sleeve can only slide up and down and cannot rotate. After the adjusting shaft is installed in the mounting sleeve, the adjusting shaft and the support plate cannot rotate.

[0015] In one or more embodiments of this utility model, the anti-reverse component includes a plug rod, which is slidably disposed at the bottom of the support. The nut is evenly chiseled with a plurality of slots that are adapted to the plug rod. After the support is raised by rotating the nut, the plug rod is locked in the slot, thereby preventing reverse rotation and thus preventing the support height from decreasing.

[0016] In one or more embodiments of this utility model, the insertion rod is provided with a push plate fixed outside the support, and the push plate is used to drive the insertion rod to move upward, so that the insertion rod is moved out of the slot.

[0017] In one or more embodiments of this utility model, a pair of springs are installed between the upper end of the insertion rod and the top wall of the support, and the spring force is used to push the insertion rod into the slot.

[0018] Compared with the prior art, this utility model, through its structural design, can effectively adjust the height of the frame according to actual usage needs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of an adjustable height caster device for a low-profile machine frame according to one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the frame structure in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the caster mechanism in one embodiment of the present invention;

[0023] Figure 4 This is an exploded view of the caster mechanism in one embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional view of the caster mechanism in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the support structure in one embodiment of the present invention;

[0026] Figure 7 for Figure 6 The structural diagram shown at point A in the middle;

[0027] Figure 8 This is a schematic diagram of the structure of the adjusting shaft and nut in one embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the support plate in one embodiment of the present invention.

[0029] Explanation of key figure labels:

[0030] 1-Frame, 2-Cast mechanism, 201-Support, 202-Connecting plate, 203-T-shaped locking block, 204-T-shaped slot, 205-First screw hole, 206-First bolt, 207-Adjusting shaft, 208-Support plate, 209-First keyway, 210-First flat key, 211-First slide groove, 212-Threaded section, 213-Nut, 214-Locking groove, 215-Locking component, 216-Second bolt, 217-Second screw hole, 218-Mounting sleeve, 219-Second keyway, 220-Second flat key, 221-Second slide groove, 222-Third bolt, 223-Plug rod, 224-Slot, 225-Push plate, 226-Spring, 227-Moving wheel. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] like Figures 1 to 9 As shown, an adjustable height caster device for a low-profile frame according to one embodiment of the present invention includes: a frame 1 and two pairs of caster mechanisms 2.

[0033] like Figures 1 to 9 As shown, frame 1 is a key piece of equipment used to support and guide the material roll during the unwinding and rewinding process. Two pairs of caster mechanisms 2 are installed on both sides of frame 1. Each pair of caster mechanisms 2 includes a support 201. A connecting plate 202 is fixed to one side of the support 201. The connecting plate 202 is fixed to the side wall of frame 1. The support 201 is fixedly installed to the side wall of frame 1 through the connecting plate 202.

[0034] In addition, an adjusting shaft 207 is slidably installed inside the support 201. The bottom end of the adjusting shaft 207 is connected to a support plate 208. A threaded section 212 is provided between the adjusting shaft 201 and the support plate 208. A nut 213 is threadedly connected to the threaded section 212. A movable wheel 227 is installed at the bottom of the support plate 208. When the support 201 is installed on the adjusting shaft 207, the height of the frame 1 can be adjusted by rotating the nut 213, which will cause the support 201 to move up and down.

[0035] Secondly, a mounting sleeve 218 is fixed on the support plate 208. One end of the adjusting shaft 207 near the support plate 208 is inserted into the mounting sleeve 218. A third bolt 222 is provided between the support plate 208 and the adjusting shaft 207. After the adjusting shaft 207 is inserted into the mounting sleeve 218, the third bolt 222 is turned on the bottom knob of the support plate 208. The adjusting shaft 207 and the support plate 208 are fixedly connected by the third bolt 222.

[0036] Finally, a locking groove 214 is carved on the support 201, and a locking element 215 is provided on the locking groove 214. A second bolt 216 is installed between the locking element 215 and the adjusting shaft 207. A second screw hole 217 adapted to the second bolt 216 is carved on the adjusting shaft 207. After the height of the support 201 is adjusted, the locking element 215 is locked in the locking groove 214, and then the second bolt 216 is turned into the second screw hole 217. The second bolt 216 passes through the locking element 215 and, at the same time, cooperates with the bottom nut 213 to lock the support 201 and the adjusting shaft 207.

[0037] like Figures 1 to 3 As shown, a T-shaped slot 204 is cut into the connecting plate 202, and a T-shaped locking block 203 adapted to the T-shaped slot 204 is fixed on the side wall of the frame 1. When the caster mechanism 2 is installed on the side wall of the frame 1, the T-shaped locking block 203 is locked into the T-shaped slot 204 to complete the pre-installation between the frame 1 and the caster mechanism 2. At the same time, the first screw hole 205 on the connecting plate 202 and the frame 1 corresponds, which facilitates the quick screwing of the first bolt 206 into the first screw hole 205. Multiple pairs of corresponding first screw holes 205 are cut into both the connecting plate 202 and the side wall of the frame 1. The first bolt 206 is tightened in the first screw hole 205. By tightening the first bolt 206 into the first screw hole 205, the frame 1 and the caster mechanism 2 are fixed together.

[0038] like Figure 6 and Figure 8 As shown, a first keyway 209 is carved into the side wall of the adjusting shaft 207 near the top. A first flat key 210 is installed in the first keyway 209. By setting the first flat key 210, rotation between the adjusting shaft 207 and the support 201 is prevented. By placing the first flat key 210 near the top of the adjusting shaft 207, the first flat key 210 can still be placed in the first sliding groove 211 after the support 201 is raised to a certain position. The first sliding groove 211 is carved vertically through the side wall of the support 201. The end of the first flat key 210 outside the adjusting shaft 207 slides in the first sliding groove 211. By the first flat key 210 sliding in the first sliding groove 211, the adjusting shaft 207 and the support 201 can only slide vertically and cannot rotate.

[0039] like Figures 8 to 9As shown, a second keyway 219 is chiseled on the side wall of the adjusting shaft 207 near the bottom. A second flat key 220 is installed in the second keyway 219. By setting the second flat key 220, rotation between the adjusting shaft 207 and the support plate 208 is prevented. A second sliding groove 221 is chiseled on the inner wall of the mounting sleeve 218. The second flat key 220 slides in the second sliding groove 221. By sliding the second flat key 220 in the second sliding groove 221, the adjusting shaft 207 and the mounting sleeve 218 can only slide up and down, and cannot rotate. After the adjusting shaft 207 is installed in the mounting sleeve 218, the adjusting shaft 207 and the support plate 208 cannot rotate.

[0040] like Figures 6 to 8 As shown, the anti-reverse component includes a plug rod 223, which is slidably disposed at the bottom of the support 201. The nut 213 has multiple slots 224 that are adapted to the plug rod 223 evenly carved on it. After the support 201 is raised by rotating the nut 213, the plug rod 223 is locked in the slot 224, thereby preventing the 113 from rotating in the opposite direction and causing the height of the support 201 to decrease.

[0041] like Figures 6 to 8 As shown, a push plate 225 is fixed to the outside of the support 201 for the insertion rod 223. The push plate 225 is used to drive the insertion rod 223 to move upward, so that the insertion rod 223 is removed from the slot 224. A pair of springs 226 are installed between the upper end of the insertion rod 223 and the top wall of the support 201. The elastic force of the springs 226 is used to push the insertion rod 223 into the slot 224.

[0042] Working principle: When it is necessary to assemble the frame 1 and the caster mechanism 2 of this device, firstly, the T-shaped blocks 203 on the frame 1 are all inserted into the T-shaped slots 204 on the caster mechanism 2 to complete the pre-installation between the frame 1 and the caster mechanism 2. After the T-shaped blocks 203 are inserted into the T-shaped slots 204, the first screw hole 205 on the connecting plate 202 will be aligned with the first screw hole 205 on the frame 1. Then, the first bolt 206 is tightened into the first screw hole 205, thereby fixing the frame 1 and the caster mechanism 2 and completing the assembly.

[0043] When it is necessary to raise the height of the frame 1, first use a wrench to unscrew the second bolt 216 from the second screw hole 217, then use a wrench to turn the nut 213. The nut 213 drives the support 201 to rise. After the height is raised, screw the second bolt 216 back into the second screw hole 217. The second bolt 216, through the locking piece 215, and in conjunction with the bottom nut 213, locks the support 201 and the adjusting shaft 207. At the same time, the insert rod 223 is locked in the slot 224 to prevent the nut 213 from rotating in the opposite direction, thereby improving the stability of the nut 213. The height of the other caster mechanisms 2 can be adjusted in this way.

[0044] When it is necessary to lower the height of frame 1, first use a wrench to unscrew the second bolt 216 from the second screw hole 217. Then, use the push plate 225 to move the insert rod 223 upward, so that the insert rod 223 moves out of the slot 224. Then, use the wrench to turn the nut 213 in the opposite direction to lower the height of the support 201. After the adjustment is completed, release the push plate 225. At this time, the elastic force of the spring 226 will push the insert rod 223 back into the slot 224 to prevent the nut 213 from turning in the opposite direction. Then, tighten the second bolt 216 in the second screw hole 217 to lock the adjusting shaft 207 and the support 201. The height of the other caster mechanisms 2 can be adjusted in this way.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable height caster device for low-profile racks, characterized by, include: frame; Two pairs of caster mechanisms are installed on both sides of the frame. Each pair of caster mechanisms includes a support. A connecting plate is fixed to one side of the support and is fixed to the side wall of the frame. An adjusting shaft is slidably arranged inside the support. A support plate is connected to the bottom end of the adjusting shaft. A threaded section is provided between the adjusting shaft and the support plate. A nut is threaded onto the threaded section. A movable wheel is installed at the bottom of the support plate. An installation sleeve is fixed on the support plate. The end of the adjusting shaft near the support plate is inserted into the installation sleeve. A third bolt is provided between the support plate and the adjusting shaft. A locking groove is chiseled on the support. A locking element is provided in the locking groove. A second bolt is installed between the locking element and the adjusting shaft. A second threaded hole adapted to the second bolt is chiseled on the adjusting shaft. An anti-reverse assembly is provided between the support and the nut.

2. The adjustable height caster device for a low-profile frame according to claim 1, characterized in that, The connecting plate has a T-shaped slot, and the side wall of the frame has a T-shaped block that matches the T-shaped slot.

3. The adjustable height caster device for a low-profile frame according to claim 2, characterized in that, Multiple pairs of corresponding first screw holes are drilled on both the connecting plate and the side wall of the frame, and a first bolt is tightened in the first screw hole.

4. The height adjustable caster assembly for low-profile racks of claim 1, wherein, A first keyway is carved into the side wall of the adjusting shaft near the top, and a first flat key is installed in the first keyway.

5. A height adjustable caster device for low profile racks as defined in claim 4, wherein, The support sidewall is carved with a first sliding groove running through it from top to bottom, and the end of the first flat key located outside the adjusting shaft slides in the first sliding groove.

6. The adjustable height caster device for a low-profile frame according to claim 1, characterized in that, A second keyway is chiseled on the side wall of the adjusting shaft near the bottom end, and a second flat key is installed in the second keyway.

7. The adjustable height caster device for a low-profile frame according to claim 6, characterized in that, A second groove is cut into the inner wall of the mounting sleeve, and the second flat key slides within the second groove.

8. The adjustable height caster device for a low-profile frame according to claim 1, characterized in that, The anti-reverse component includes a plug rod, which is slidably disposed at the bottom of the support, and the nut has multiple slots evenly chiseled out to fit the plug rod.

9. The adjustable height caster device for a low-profile frame according to claim 8, characterized in that, The insertion rod is fixed to a push plate outside the support.

10. The adjustable height caster device for a low-profile frame according to claim 9, characterized in that, A pair of springs are installed between the upper end of the insertion rod and the top wall of the support.

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