Anti-sinking freight elevator

Abstract

The invention discloses an anti-sinking freight elevator, and relates to the technical field of freight elevators, the anti-sinking freight elevator comprises a lifting hanging frame, a limiting device arranged on the lifting hanging frame and a limiting supporting rail corresponding to the limiting device, the lifting hanging frame is provided with a supporting platform used for bearing goods, and the limiting supporting rail is provided with a limiting device. The limiting supporting rails are arranged on the two sides of the lifting hanging frame so that the lifting hanging frame can ascend and descend along the limiting supporting rails. The limiting device comprises a clamping friction block, a side pressure guide seat and a lifting mechanism, the side pressure guide seat is used for guiding the clamping friction block to press towards the limiting supporting rail, the lifting mechanism is used for lifting the clamping friction block, the side pressure guide seat is provided with a side pressure guide groove, and the lifting mechanism is used for lifting the clamping friction block in the lifting direction of the lifting hanging frame. The distance between the side pressure guide groove and the limiting support rail is reduced; the clamping friction block moves upwards along the side pressing guide groove through the lifting mechanism so as to gradually press the limiting supporting rail. According to the invention, the elevator can be effectively prevented from sinking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of freight elevator, in particular to a sinking-preventing freight elevator. BACKGROUND

[0002] For the existing market freight elevator, the common problem in actual use is that the dynamic load is large, for example, when the goods enter the elevator, a large vibration will occur, especially when the goods are unloaded in the freight elevator, so the long-term dynamic load deviation will affect the service life of the traction mechanism, especially the traction rope will be stretched too much, so that the stopping position of the freight elevator deviates. Moreover, in the case of excessive overload, the elevator is prone to sinking, which will cause the traction rope to break, thereby affecting the safe use. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a sinking-preventing freight elevator which can effectively prevent the elevator from sinking.

[0004] In order to solve the above technical problems, the present application provides a sinking-preventing freight elevator, which comprises a lifting frame, a limiting device arranged on the lifting frame, and a limiting support rail corresponding to the limiting device, the lifting frame is provided with a support platform for carrying goods, and the lifting frame is provided with the limiting support rail on both sides to move up and down along the limiting support rail.

[0005] The limiting device comprises a clamping friction block, a side pressure guide seat for guiding the clamping friction block to press against the limiting support rail, and a lifting mechanism for lifting the clamping friction block, the side pressure guide seat is provided with a side pressure guide groove, and the distance between the side pressure guide groove and the limiting support rail becomes smaller along the lifting direction of the lifting frame.

[0006] The clamping friction block moves upward along the side pressure guide groove by the lifting mechanism to gradually press against the limiting support rail.

[0007] As an improvement of the above-mentioned scheme, the groove bottom surface of the side pressure guide groove is provided with a resistance-reducing member for reducing the friction between the clamping friction block and the groove bottom surface of the side pressure guide groove, and the resistance-reducing member is clamped between the clamping friction block and the groove bottom surface of the side pressure guide groove.

[0008] As an improvement of the above-mentioned scheme, the resistance-reducing member is laid on the groove bottom surface of the side pressure guide groove.

[0009] The resistance-reducing member is a lubricating belt or a rolling assembly.

[0010] As an improvement of the above-mentioned scheme, the rolling assembly comprises a plurality of rolling shafts and a mounting belt for mounting the rolling shafts, the mounting belt is provided with a plurality of limiting holes matched with the rolling shafts,

[0011] On the mounting belt, a partition strip is formed between adjacent limiting holes, and the partition strip is arched upward to form a limiting strip for limiting the rolling shaft from being separated from the limiting hole.

[0012] As an improvement of the above-mentioned scheme, the lifting hanging frame comprises a bottom beam, a stand corresponding to the limiting support rail, and an upper beam for mounting a traction device, and the bottom beam, the upper beam, and the stand are connected to form a square frame structure.

[0013] The lifting mechanism comprises a lifting connecting rod for pulling the clamping friction block upward, a linkage swing arm for controlling the lifting of the lifting connecting rod, and a drive shaft for driving the linkage swing arm to swing up and down, one end of the lifting connecting rod is hinged to the linkage swing arm, the other end is hinged to the clamping friction block, and the drive shaft is installed on the bottom beam.

[0014] As an improvement of the above-mentioned scheme, the bottom of the bottom beam is provided with the limiting device on both sides, and the limiting devices on both sides are respectively active limiting devices and passive limiting devices.

[0015] One end of the drive shaft of the active limiting device is provided with a driven control drive swing arm, and the other end is provided with a first synchronous swing arm.

[0016] One end of the drive shaft of the passive limiting device is provided with a second synchronous swing arm corresponding to the first synchronous swing arm, and the first synchronous swing arm and the second synchronous swing arm are connected by a synchronous connecting rod, so that when the drive swing arm is driven to swing, the lifting connecting rods of the active limiting device and the passive limiting device can be lifted synchronously.

[0017] As an improvement of the above-mentioned scheme, the bottom beam is provided with a reset assembly for driving the lifting connecting rod to rise;

[0018] The reset assembly comprises a reset spring, a reset support plate fixed to the bottom beam, and an adjusting nut, the synchronous connecting rod is provided with a first threaded section threadedly connected with the adjusting nut, one end of the reset spring abuts against the reset support plate, and the other end abuts against the adjusting nut, so that the lifting connecting rod is driven to move upward by the reset spring.

[0019] As an improvement of the above-mentioned scheme, the clamping friction block and the side pressure guide seat are combined into a sinking prevention assembly, the limiting device comprises two sinking prevention assemblies, and the sinking prevention assemblies are distributed on both sides of the limiting support rail.

[0020] The limiting device further comprises a spacing adjustment assembly for adjusting the spacing between the two sinking prevention assemblies, the spacing adjustment assembly comprises an adjusting rack, a maximum spacing piece, and a spacing adjustment screw rod, both sides of the maximum spacing piece are provided with spacing structures, and the sinking prevention assemblies are located between the two spacing structures.

[0021] The spacing adjustment screw is connected with the side pressure guide seat after passing through the adjustment frame and the maximum spacing limiting member in sequence.

[0022] The adjustment frame is provided with a nut member matched with the spacing adjustment screw to adjust the spacing between the side pressure guide seat and the spacing limiting structure.

[0023] As an improvement of the above scheme, the bottom of the lifting hanging frame is provided with a structural support beam, the bottom of the support platform is provided with an auxiliary support beam on both sides, and the structural support beam is provided with a plurality of support connecting rods on both sides.

[0024] The ends of the support connecting rods are connected with the structural support beam and the auxiliary support beam respectively.

[0025] As an improvement of the above scheme, the two sides of the stand are respectively provided with a pull rod connected with the two ends of the auxiliary support beam.

[0026] The auxiliary support beam is provided with a hinged shaft for connecting with the pull rod, one end of the pull rod is provided with a second threaded section, the hinged shaft is provided with a through hole for the second threaded section to pass through, and the second threaded section is provided with a tension nut to adjust the length of the second threaded section passing through the through hole.

[0027] The implementation of the present application has the following beneficial effects:

[0028] The present application discloses a sinking-preventing cargo elevator, which comprises a lifting hanging frame, a limiting device and a limiting support rail corresponding to the limiting device.

[0029] Moreover, the limiting device comprises a clamping friction block, a side pressure guide seat for guiding the clamping friction block to press against the limiting support rail, and a lifting mechanism for lifting the clamping friction block. The side pressure guide seat is provided with a side pressure guide groove, and the spacing between the side pressure guide groove and the limiting support rail becomes smaller along the lifting direction of the lifting hanging frame. Therefore, when the clamping friction block is lifted upward along the side pressure guide groove by the lifting mechanism to gradually press against the limiting support rail, the friction force between the clamping friction block and the limiting support rail gradually increases, thereby providing upward supporting force to the lifting hanging frame. When the load of the support platform is larger, the pressure of the clamping friction block pressing against the limiting support rail is larger, thereby providing greater friction force to avoid sinking of the support platform, i.e., having strong self-locking ability. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1It is the three-dimensional structure schematic diagram of the anti-sinking cargo elevator of the present application;

[0031] Figure 2 It is the bottom structure schematic diagram of the anti-sinking cargo elevator of the present application;

[0032] Figure 3 It is the structure schematic diagram of the limiting device of the present application;

[0033] Figure 4 It is the structure exploded schematic diagram of the limiting device of the present application;

[0034] Figure 5 It is the structure schematic diagram of the installation belt of the present application;

[0035] Figure 6 It is the structure schematic diagram of the reset assembly of the present application;

[0036] Figure 7 It is the structure schematic diagram of the active limiting device of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with the accompanying drawings.

[0038] Referring to Figure 1 , 2 and 3, the present application provides an anti-sinking cargo elevator, which comprises a lifting frame 1, a limiting device 2 arranged on the lifting frame 1, and a limiting support rail 3 corresponding to the limiting device 2, the lifting frame 1 is provided with a support platform 4 for carrying goods, and the lifting frame 1 is provided with the limiting support rail 3 on both sides thereof to move up and down along the limiting support rail 3.

[0039] Among them, the limiting device 2 comprises a clamping friction block 21, a side pressure guide seat 22 for guiding the clamping friction block 21 to press against the limiting support rail 3, and a lifting mechanism for lifting the clamping friction block 21, the side pressure guide seat 22 is provided with a side pressure guide groove 221, and the distance between the side pressure guide groove 221 and the limiting support rail 3 becomes smaller along the lifting direction of the lifting frame 1.

[0040] The clamping friction block 21 moves upward along the side pressure guide groove 221 by the lifting mechanism to gradually press against the limiting support rail 3.

[0041] Specifically, referring to Figure 4The bottom surface of the side pressure guide groove 221 is provided with a resistance reducing member 6 for reducing the friction between the clamping friction block 21 and the side pressure guide groove 221. In this way, when the clamping friction block 21 is subjected to a large load, the sliding reaction time of the clamping friction block 21 can be shortened, and the sinking amount of the elevator can be further reduced.

[0042] The resistance reducing member 6 is laid on the bottom surface of the side pressure guide groove 221, and is a lubricating belt. The lubricating belt can be a belt made of Teflon or other wear-resistant low-friction coefficient materials.

[0043] Preferably, referring to Figure 4 and 5 The resistance reducing member 6 is a rolling assembly, which includes a plurality of rolling shafts 61 and a mounting belt 62 for mounting the rolling shafts 61. The mounting belt 62 is provided with a plurality of limiting holes 621 adapted to the rolling shafts 61. Between adjacent limiting holes 621 on the mounting belt 62, a partition strip 622 is formed, which is arched upward to form a limiting strip for limiting the rolling shafts 61 from disengaging from the limiting holes 621. The mounting belt 62 is a metal plate, which can be connected to the side pressure guide groove 221 by screw connection. When disassembly is needed, the mounting belt 62 can be directly removed as a whole, which is convenient for replacement and maintenance.

[0044] The lifting frame 1 includes a bottom beam 11, a vertical column 12 corresponding to the limiting support rail 3, and an upper beam 13 for mounting a traction device. The bottom beam 11, the upper beam 13, and the vertical column 12 are connected to form a square frame structure.

[0045] The lifting mechanism includes a lifting link 23 for pulling the clamping friction block 21 upward, a linkage swing arm 24 for controlling the lifting of the lifting link 23, and a drive shaft 25 for driving the linkage swing arm 24 to swing up and down. One end of the lifting link 23 is hinged to the linkage swing arm 24, and the other end is hinged to the clamping friction block 21. The drive shaft 25 is installed on the bottom beam 11. Therefore, the lifting of the lifting link 23 can be controlled by controlling the forward and reverse rotation of the drive shaft 25.

[0046] In order to balance the support of the lifting frame 1, the bottom of the bottom beam 11 is provided with the limiting device 2. For the convenience of description, the limiting devices 2 on both sides are respectively active limiting devices and passive limiting devices.

[0047] Referring to Figure 7, the driving shaft 25 of the active limiting device is provided with a driving swing arm 26 driven and controlled at one end, and a first synchronous swing arm 27 at the other end; the driving shaft 25 of the passive limiting device is provided with a second synchronous swing arm 28 corresponding to the first synchronous swing arm 27, and the first synchronous swing arm 27 and the second synchronous swing arm 28 are connected through a synchronous connecting rod 29, so that the lifting connecting rod 23 of the active limiting device and the passive limiting device can be synchronously lifted when the driving swing arm 26 is driven to swing. In this way, the problem of relative tilting caused by asynchronous support of the two sides of the lifting frame 1 can be avoided.

[0048] Referring to Figure 6 , in order to ensure the reset of the clamping friction block 21 and avoid affecting the normal lifting of the elevator, the bottom beam 11 is provided with a reset assembly 7 for driving the lifting connecting rod 23 to rise; the reset assembly includes a reset spring 71, a reset support plate 72 fixed to the bottom beam 11, and an adjusting nut 73, the synchronous connecting rod 29 is provided with a first threaded section 291 threadedly connected with the adjusting nut 73, one end of the reset spring 71 abuts against the reset support plate 72, and the other end abuts against the adjusting nut 73, so that the lifting connecting rod 23 is driven to move upward by the reset spring 71. Moreover, by screwing the adjusting nut 73, the initial position of the clamping friction block 21 on the side pressure guide seat 22 can be changed, so that the initial distance between the clamping friction block 21 and the limiting support rail 3 can be shortened, and the reaction speed of the clamping friction block 21 clamping the limiting support rail 3 can be improved.

[0049] The clamping friction block 21 and the side pressure guide seat 22 are combined into a sinking prevention assembly, the limiting device 2 includes two sinking prevention assemblies, and the sinking prevention assemblies are distributed on both sides of the limiting support rail 3.

[0050] Referring to Figure 3 , the limiting device 2 further includes a distance adjusting assembly 8 for adjusting the distance between the two sinking prevention assemblies, the distance adjusting assembly 8 includes an adjusting frame 81, a maximum distance limiting piece 82, and a distance adjusting screw rod 83, the two sides of the maximum distance limiting piece 82 are provided with distance limiting structure walls 821, and the sinking prevention assemblies are located between the two distance limiting structure walls 821, and the maximum distance limiting piece provided with the distance limiting structure walls 821 is preferably a column body with a U-shaped cross section.

[0051] The distance adjusting screw rod 83 is connected with the side pressure guide seat 22 after sequentially penetrating through the adjusting frame 81 and the maximum distance limiting piece 82.

[0052] The adjusting frame 81 is provided with a nut piece 84 matched with the spacing adjusting screw 83, so as to adjust the spacing between the side pressure guide base 22 and the spacing limiting structure 821 by screwing the nut piece 84, thereby changing the initial spacing between the clamping friction block and the limiting support rail 3.

[0053] Referring to Figure 2 In order to strengthen the structural strength of the support platform 4, the bottom of the lifting hanging frame 1 is provided with a structural support beam 14, the bottom of the support platform 4 is provided with an auxiliary support beam 41 on both sides, and the structural support beam 14 is provided with a plurality of support connecting rods 42 on both sides; the two ends of the support connecting rod 42 are respectively connected with the structural support beam 14 and the auxiliary support beam 41.

[0054] Further, the two sides of the stand column 12 are respectively provided with a pull rod 15 for connecting with the two ends of the auxiliary support beam 41, and the two ends of the auxiliary support beam 41 are respectively connected with the two stand columns 12 through the pull rod 15. The auxiliary support beam 41 is provided with a hinged shaft 43 for connecting with the pull rod 15, one end of the pull rod 15 is provided with a second threaded section 151, the hinged shaft 43 is provided with a through hole for the second threaded section 151 to pass through, and the second threaded section 151 is provided with a tension nut 153 to adjust the length of the second threaded section 151 passing through the through hole, so as to increase the pre-tightening force of the upward traction of the support platform 4. The support platform 4 can be a metal plate or a metal plate provided with a plurality of structural support strips at the bottom.

[0055] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements are also considered as the protection scope of the present application.

Claims

1. A freight elevator designed to prevent sinking, characterized in that, The device includes a lifting frame, a limiting device on the lifting frame, and a limiting support rail corresponding to the limiting device. The lifting frame is provided with a support platform for carrying goods, and the limiting support rails are provided on both sides of the lifting frame to allow for vertical movement along the limiting support rails. The limiting device includes a clamping friction block, a side pressure guide seat for guiding the clamping friction block to press against the limiting support rail, and a lifting mechanism for raising and lowering the clamping friction block. The side pressure guide seat is provided with a side pressure guide groove, and the distance between the side pressure guide groove and the limiting support rail decreases along the lifting direction of the lifting frame. The clamping friction block moves upward along the side pressure guide groove via the lifting mechanism to gradually press against the limiting support rail.

2. The anti-sinking freight elevator as described in claim 1, characterized in that, The bottom surface of the side pressure guide groove is provided with a friction reducing element for reducing friction between the side pressure guide groove and the clamping friction block. The friction reducing element is sandwiched between the clamping friction block and the bottom surface of the side pressure guide groove.

3. The anti-sinking freight elevator as described in claim 2, characterized in that, The drag-reducing component is laid on the bottom surface of the side pressure guide groove; The drag-reducing component is made of a lubricating belt or a rolling assembly.

4. The anti-sinking freight elevator as described in claim 3, characterized in that, The rolling assembly includes multiple rollers and a mounting belt for mounting the rollers. The mounting belt is provided with multiple limiting holes that are adapted to the rollers. On the mounting strip, a partition strip is formed between adjacent limiting holes, and the partition strip is arched upward to form a limiting strip that restricts the roller from disengaging from the limiting hole.

5. The anti-sinking freight elevator as described in claim 1, characterized in that, The lifting frame includes a bottom beam, a column corresponding to the limiting support rail, and an upper beam for installing a traction device. The bottom beam, upper beam, and column are connected to form a square frame structure. The lifting mechanism includes a lifting link for pulling up the clamping friction block, a linkage swing arm for controlling the lifting link's raising and lowering, and a drive shaft for driving the linkage swing arm to swing up and down. One end of the lifting link is hinged to the linkage swing arm, and the other end is hinged to the clamping friction block. The drive shaft is mounted on the bottom beam.

6. The anti-sinking freight elevator as described in claim 5, characterized in that, The bottom beam is provided with limiting devices on both sides, and the limiting devices on both sides are an active limiting device and a passive limiting device, respectively. One end of the drive shaft of the active limiting device is provided with a drive swing arm controlled by the drive, and the other end is provided with a first synchronous swing arm. One end of the drive shaft of the passive limiting device is provided with a second synchronous swing arm corresponding to the first synchronous swing arm. The first synchronous swing arm and the second synchronous swing arm are connected by a synchronous connecting rod so that when the driving swing arm is driven to swing, the lifting connecting rods of the active limiting device and the passive limiting device can rise and fall synchronously.

7. The anti-sinking freight elevator as described in claim 6, characterized in that, The bottom beam is equipped with a reset assembly for driving the lifting link to rise; The reset assembly includes a reset spring, a reset support plate fixed to the bottom beam, and an adjusting nut. The synchronous connecting rod has a first threaded section that is threadedly connected to the adjusting nut. One end of the reset spring abuts against the reset support plate, and the other end abuts against the adjusting nut, so as to drive the lifting connecting rod to move upward through the reset spring.

8. The anti-sinking freight elevator as described in claim 1, characterized in that, The clamping friction block and the side pressure guide seat are combined to form an anti-sinking component. The limiting device includes two of the anti-sinking components, which are distributed on both sides of the limiting support rail. The limiting device also includes a spacing adjustment component for adjusting the distance between the two anti-sinking components. The spacing adjustment component includes an adjustment frame, a maximum distance limiting component and a spacing adjustment screw. The maximum distance limiting component has distance limiting structural walls on both sides, and the anti-sinking component is located between the two distance limiting structural walls. The spacing adjustment screw passes through the adjustment frame and the maximum distance limiting component in sequence and then connects to the side pressure guide seat; The adjusting frame is equipped with a nut that matches the spacing adjusting screw to adjust the spacing between the side pressure guide seat and the limiting structure wall.

9. The anti-sinking freight elevator as described in claim 1, characterized in that, The bottom of the lifting frame is provided with a structural support beam, the bottom sides of the support platform are provided with auxiliary support beams, and the sides of the structural support beam are provided with multiple support connecting rods. Both ends of the support connecting rod are connected to the structural support beam and the auxiliary support beam, respectively.

10. The anti-sinking freight elevator as described in claim 9, characterized in that, The column is provided with tie rods on both sides for connecting with the auxiliary support beam, and the two ends of the auxiliary support beam are connected to the columns on both sides through the tie rods. The auxiliary support beam is provided with a hinge shaft for connecting with the tie rod. One end of the tie rod is provided with a second threaded section. The hinge shaft is provided with a through hole for the second threaded section to pass through. The second threaded section is equipped with a tension nut to adjust the length of the second threaded section extending out of the through hole.

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