Height-adjustable cable drum

Abstract

The utility model relates to a height-adjustable cable drum, and belongs to the technical field of construction hoists. The barrel comprises a barrel top frame, a cylindrical upper barrel, a cylindrical lower barrel and a barrel bottom which are coaxially arranged, the barrel bottom is installed at the bottom of the cylindrical lower barrel, the barrel top frame comprises a top barrel body of a girdling annular structure, a ring is coaxially and fixedly arranged at the lower end of the top barrel body, and the inner wall of the ring is connected to the top end of the cylindrical upper barrel in a sleeved mode; the diameter of the outer wall of the cylindrical upper barrel is smaller than that of the inner wall of the cylindrical lower barrel, the outer wall of the cylindrical upper barrel is in clearance fit with the inner wall of the cylindrical lower barrel, a first through hole is formed in the upper end of the side wall of the cylindrical lower barrel, and a first shear nail is connected to the first through hole in a matched mode. The lower end of the upper cylindrical barrel is supported and fixed to the top end of the lower cylindrical barrel through the first shear nails, when the cable barrel needs a low height, the first shear nails move outwards, and the lower end of the upper cylindrical barrel is supported and fixed through the barrel bottom. According to the utility model, the adjustment operation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a height adjustable cable drum belongs to construction hoist technical field. BACKGROUND

[0002] The construction hoist is also called the construction elevator, and can also be called the outdoor elevator and the construction cage, is the construction machinery of carrying people and goods in the building, and is mainly used for the construction of the interior and exterior decoration of high-rise building, bridge, chimney and other buildings. The construction hoist is composed of a cage, a driving mechanism, a standard section, a wall attachment, a chassis, a fence and an electrical system, is the construction machinery of carrying people and goods in the building, the driving mechanism is installed on the cage, the driving mechanism generally comprises a motor and a gear and rack pair, the gear is installed on the motor output end, the rack is vertically installed on the standard section, and the motor drives the cage to ascend and descend on the standard section through the gear and rack pair.

[0003] In order to provide power support for the motor, the cable is connected between the cage and the ground power supply end, and the cable needs to meet the power supply of the highest position of the cage, so the lower end of the cable needs to be accommodated in the cable drum during the lifting of the cage.

[0004] In some super high cases, the general height of the cable drum cannot meet the accommodation requirement of the cable, at this time, the cable drum needs to be increased in height, but this will increase the transportation space required by the cable drum and increase the transportation cost.

[0005] Moreover, sometimes when the construction hoist is purchased, the height of the future application is not clear, and when the height requirement of the construction site is low, the higher cable drum will affect the observation of the situation in the cable drum by the maintenance personnel.

[0006] In order to realize the actual height of the adjusting cable drum, the prior patent application (Chinese utility model patent document with publication number CN221565465U) of the applicant provides a cable drum for construction hoist, which comprises a top drum frame, a cylindrical upper drum, a cylindrical lower drum and a barrel bottom coaxially arranged. The barrel bottom is installed at the bottom of the cylindrical lower drum. The top drum frame comprises a top drum body with a waist ring structure. The lower end of the top drum body is coaxially fixed with a ring. The inner wall of the ring is sleeved on the outer peripheral wall top end of the cylindrical upper drum. The top end of the cylindrical upper drum supports and fixes the top drum frame. The outer wall diameter of the cylindrical upper drum is smaller than the inner wall diameter of the cylindrical lower drum. The gap is formed between the outer wall of the cylindrical upper drum and the inner wall of the cylindrical lower drum. The first hanging ear plate arranged in a ring shape is fixed at the lower end of the outer wall of the cylindrical upper drum. The cylindrical upper drum is supported and fixed on the top end of the cylindrical lower drum through the first hanging ear plate. When the required height of the cable drum is high, the first hanging ear plate is located at the lower end of the outer wall of the cylindrical upper drum as the use state. The cylindrical upper drum is supported and fixed on the top end of the cylindrical lower drum through the first hanging ear plate. When the required height of the cable drum is relatively low or in a non-working state (such as during transportation), the cylindrical upper drum can be inverted. At this time, the first hanging ear plate is located at the upper end of the outer wall of the cylindrical upper drum. Since the outer wall diameter of the cylindrical upper drum is smaller than the inner wall diameter of the cylindrical lower drum, most of the cylindrical wall of the cylindrical upper drum is hidden in the cylindrical lower drum. The above scheme can meet the demand of increasing the height of the cable drum, without increasing the transportation cost. Moreover, when the height demand is low at the construction site and the cable drum does not need to be increased in height, the increased part can still be installed on the cable drum, thereby avoiding the problem of losing the drum body. However, the above scheme still has some deficiencies, mainly in the following two aspects: first, when adjusting the actual height of the cable drum, the cylindrical upper drum needs to be switched between the upright state and the inverted state, which is not convenient to operate and is laborious; second, in the transportation state, the top drum frame can only be arranged at the top end of the cylindrical upper drum, and the overall height of the cable drum is still very high, so there is still a lot of room for improvement in the convenience of transportation. Utility model content

[0007] The technical problem to be solved by the utility model is to provide a height-adjustable cable drum, which can make the adjustment operation more convenient.

[0008] The utility model discloses a height adjustable cable drum, including coaxial setting's cylinder top frame, cylindrical upper cylinder, cylindrical lower cylinder and bucket bottom, bucket bottom installs at the bottom of cylindrical lower cylinder, and cylinder top frame contains the top cylinder main part with the waist ring annular structure, and the lower end of top cylinder main part is coaxially fixed with ring, and the inner wall of ring is connected in the top of cylindrical upper cylinder, and the top of cylindrical upper cylinder supports and fixes cylinder top frame, the outer wall diameter of cylindrical upper cylinder is less than the inner wall diameter of cylindrical lower cylinder, and the clearance fit is formed between the outer wall of cylindrical upper cylinder and the inner wall of cylindrical lower cylinder, and the side wall upper end of cylindrical lower cylinder is provided with a plurality of first through holes that are annularly spaced, and each first through hole is matched with first shear nail, and first shear nail can move along the axial direction of first through hole to make first shear nail switch between the first state and the second state, when first shear nail is in the first state, the lower end of cylindrical upper cylinder is supported and fixed on the top end of cylindrical lower cylinder through first shear nail, when first shear nail is in the second state, the lower end of cylindrical upper cylinder is supported and fixed through bucket bottom or the convex of the inner wall lower end of cylindrical lower cylinder.

[0009] Further preferably, the axis of the first shear pin is horizontally arranged, the first shear pin and the first through hole form a sliding fit, one end of the first shear pin inside the cylindrical lower cylinder is fixedly connected with a first limiting shaft stopper at an end face, the upper end of the first limiting shaft stopper is protrudingly arranged relative to the outer side wall of the first shear pin, one end of the first shear pin outside the cylindrical lower cylinder is fixedly provided with a first pin cap, a first spring is sleeved on the outer circumferential side of the first shear pin between the first pin cap and the outer surface of the cylindrical lower cylinder, one end of the first spring abuts against the first pin cap, and the other end abuts against the outer surface of the cylindrical lower cylinder, when the first spring is in a natural state, the first shear pin corresponds to the second state, and the side end face of the first limiting shaft stopper close to the center of the cylindrical lower cylinder has a spacing in the horizontal direction with the outer side wall of the cylindrical upper cylinder.

[0010] Further preferably, the outer side wall of the first shear pin at one end inside the cylindrical lower cylinder is provided with a first arc-shaped clamping groove, the lower end face of the cylindrical upper cylinder has a first arc-shaped protrusion arranged in a ring shape, when the lower end of the cylindrical upper cylinder is supported and fixed on the top end of the cylindrical lower cylinder through the first shear pin, the first arc-shaped protrusion and the first arc-shaped clamping groove form a clamping fit.

[0011] Further preferably, two first shear pins are provided and symmetrically distributed relative to the central axis of the cylindrical lower cylinder.

[0012] Further preferably, the outer wall of the ring in the top frame is in clearance fit with the inner wall of the cylindrical upper barrel, the side wall of the cylindrical upper barrel is provided with a plurality of second through holes arranged in annular intervals, each second through hole is matched with a second shear pin, the second shear pin can move along the axial direction of the second through hole to switch between the first state and the second state, when the second shear pin is in the first state, the lower end of the ring is supported and fixed to the top end of the cylindrical upper barrel through the second shear pin, when the second shear pin is in the second state, the lower end of the ring is supported and fixed through the barrel bottom or the protrusion at the lower end of the inner wall of the cylindrical upper barrel.

[0013] Further preferably, the axis of the second shear pin is horizontally arranged, the second shear pin is in sliding fit with the second through hole, one end of the second shear pin inside the cylindrical upper barrel is fixedly connected with a second limiting shaft stopper at the end face, the upper end of the second limiting shaft stopper is protruding relative to the outer side wall of the second shear pin, the other end of the second shear pin outside the cylindrical upper barrel is fixedly provided with a second pin cap, the outer circumferential side of the second shear pin is sleeved with a second spring in the region between the second pin cap and the outer surface of the cylindrical upper barrel, one end of the second spring is in abutment with the second pin cap, and the other end is in abutment with the outer surface of the cylindrical upper barrel, when the second spring is in the natural state, the second shear pin corresponds to the second state, and at this time, the side end face of the second limiting shaft stopper close to the center of the cylindrical upper barrel has a distance in the horizontal direction from the outer side wall of the ring.

[0014] Further preferably, the outer side wall of the second shear pin at one end inside the cylindrical upper barrel is provided with a second arc-shaped clamping groove, the lower end face of the ring is provided with a second arc-shaped protrusion arranged in annular, when the lower end of the ring is supported and fixed to the top end of the cylindrical upper barrel through the second shear pin, the second arc-shaped protrusion is in clamping fit with the second arc-shaped clamping groove.

[0015] Further preferably, two second shear pins are provided and symmetrically distributed relative to the central axis of the cylindrical upper barrel.

[0016] Further preferably, the barrel bottom and the cylindrical lower barrel are fixedly connected as a whole, a plurality of water leakage holes are formed in the barrel bottom.

[0017] Further preferably, the side wall of the top barrel body is provided with a hollow structure.

[0018] The utility model discloses beneficial effect is: when the height of cable drum required is higher, first shear nail is in the first state, and the lower end of cylindrical upper drum is supported and fixed to the top end of cylindrical lower drum through first shear nail. When the height of cable drum required is relatively lower or is in non - working state (for example in the transportation process), then only need to slightly lift up cylindrical upper drum, first shear nail is switched to the second state at this moment, and the lower end of cylindrical upper drum can be supported and fixed through the bottom of the barrel or through the projection of the lower end of the inner wall of cylindrical lower drum, because the outer wall diameter of cylindrical upper drum is less than the inner wall diameter of cylindrical lower drum, and the vast majority of drum wall of cylindrical upper drum hides in cylindrical lower drum. In the whole process of adjusting the actual height of cable drum, only need to operate first shear nail, and cylindrical upper drum always keeps the right standing state, and can conveniently adjust operation. In the preferred mode of the utility model, when cable drum is in the transportation process, second shear nail can also be switched to the second state, and the lower end of the ring is supported and fixed through the bottom of the barrel or through the projection of the lower end of the inner wall of cylindrical upper drum, the vast majority of drum top frame can hide in cylindrical upper drum at this moment, even hide in cylindrical upper drum, save the transportation space, thereby reduce transportation cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0020] Figure 2 It is the three -dimensional structure schematic diagram of the utility model in the height -added state. Figure 1 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0021] Figure 3 It is the three -dimensional structure schematic diagram of the utility model in the height -added state. Figure 1 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0022] Figure 4 It is the three -dimensional structure schematic diagram of the utility model in the height -added state. Figure 1 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0023] Figure 5 It is the three -dimensional structure schematic diagram of the utility model in the height -added state. Figure 1 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0024] Figure 6 It is the three -dimensional structure schematic diagram of the utility model in the height -added state. Figure 5 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0025] Figure 7 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0026] Figure 8 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0027] Figure 9 It is the three -dimensional structure schematic diagram of the utility model in the height -added state.

[0028] The parts in the figure are marked as follows: a cylinder top frame 1, a cylindrical upper cylinder 2, a cylindrical lower cylinder 3, a barrel bottom 4, a first shear pin 5, a first spring 6, a second shear pin 7, a second spring 8, a waist ring structure 11, a ring 12, a second arc-shaped protrusion 13, a hollow structure 14, a first arc-shaped clamping groove 21, a second through hole 22, a first through hole 31, a water leakage hole 41, a first arc-shaped clamping groove 51, a first pin cap 52, a first limiting shaft stop 53, a second arc-shaped clamping groove 71, a second pin cap 72, and a second limiting shaft stop 73. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0030] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0031] As shown in Figures 1 to 9 The present application comprises a cylinder top frame 1, a cylindrical upper cylinder 2, a cylindrical lower cylinder 3 and a barrel bottom 4 arranged coaxially. The barrel bottom 4 is installed at the bottom of the cylindrical lower cylinder 3. The cylinder top frame 1 comprises a top cylinder main body having a waist ring structure 11. The lower end of the top cylinder main body is coaxially fixed with a ring 12. The inner wall of the ring 12 is sleeved on the top end of the cylindrical upper cylinder 2, and the top end of the cylindrical upper cylinder 2 supports and fixes the cylinder top frame 1. The outer wall diameter of the cylindrical upper cylinder 2 is smaller than the inner wall diameter of the cylindrical lower cylinder 3. The gap between the outer wall of the cylindrical upper cylinder 2 and the inner wall of the cylindrical lower cylinder 3 is matched. A plurality of first through holes 31 are arranged in a ring shape and spaced apart on the side wall upper end of the cylindrical lower cylinder 3. Each first through hole 31 is matched with a first shear pin 5. The first shear pin 5 can move along the axial direction of the first through hole 31 to switch the first shear pin 5 between a first state and a second state. When the first shear pin 5 is in the first state, the lower end of the cylindrical upper cylinder 2 is supported and fixed on the top end of the cylindrical lower cylinder 3 through the first shear pin 5. When the first shear pin 5 is in the second state, the lower end of the cylindrical upper cylinder 2 is supported and fixed through the barrel bottom 4 or the protrusion on the inner wall lower end of the cylindrical lower cylinder 2. Figure 1 and Figure 2 The working state shown in the figure is that the lower end of the cylindrical upper cylinder 2 is supported and fixed on the top end of the cylindrical lower cylinder 3 through the first shear pin 5. Figures 4 to 6The two working states shown are that the lower end of the cylindrical upper barrel 2 is supported and fixed by the barrel bottom 4. The "waist ring structure 11" is a general term in the art, which is usually formed by the butt joint of coaxial upper and lower conical barrels. The diameter of the upper conical barrel decreases from top to bottom, and the diameter of the lower conical barrel increases from top to bottom, forming a reduced diameter part in the middle of the barrel for guiding the cable into the cable barrel. Since the diameter of the lower conical barrel decreases from bottom to top, in some embodiments, the barrel top frame 1 can be in contact with the inner side wall of the lower conical barrel and the top end surface of the cylindrical lower barrel 3 to play a supporting and fixing role, which is simple and reliable.

[0032] The first key technical point of the utility model is to improve the supporting and fixing method of the cylindrical upper barrel 2. When the height required by the cable barrel is relatively high, the first shear nail 5 is in the first state, and the lower end of the cylindrical upper barrel 2 is supported and fixed on the top end of the cylindrical lower barrel 3 by the first shear nail 5. For details, please refer to Figure 1 and Figure 2 When the height required by the cable barrel is relatively low or in a non-working state (for example, during transportation), it is only necessary to slightly lift the cylindrical upper barrel 2 upward, and at this time, the first shear nail 5 is switched to the second state, so that the lower end of the cylindrical upper barrel 2 is supported and fixed by the barrel bottom 4 or the protrusion at the lower end of the inner wall of the cylindrical lower barrel 3, Figures 4 to 6 The two working states shown are that the lower end of the cylindrical upper barrel 2 is supported and fixed by the barrel bottom 4. Since the outer wall diameter of the cylindrical upper barrel 2 is smaller than the inner wall diameter of the cylindrical lower barrel 3, most of the barrel wall of the cylindrical upper barrel 2 is hidden in the cylindrical lower barrel 3. During the entire process of adjusting the actual height of the cable barrel, only the first shear nail 5 needs to be operated, and the cylindrical upper barrel 2 always maintains an upright state, which can be conveniently adjusted and operated.

[0033] In order to make the structure simple and reliable, the axis of the first shear nail 5 is preferably horizontally arranged. It can be understood that in some embodiments, the axis of the first shear nail 5 is also inclined, which does not affect the realization of the supporting and fixing function. As long as the first shear nail 5 and the cylindrical lower barrel 3 can be relatively fixed when the first shear nail 5 is in the first state, and the length of the first shear nail 5 extending into the cylindrical lower barrel 3 can meet the requirements of the first shear nail 5 supporting and fixing the cylindrical upper barrel 2.

[0034] In some alternative embodiments, the first shear pin 5 and the first through hole 31 can be connected in a threaded manner. To further facilitate operation, preferably, the first shear pin 5 and the first through hole 31 form a sliding fit, one end of the first shear pin 5 inside the cylindrical lower barrel 3 is fixedly connected with a first limiting shaft stopper 53 at an end face, the upper end of the first limiting shaft stopper 53 is protruding relative to the outer side wall of the first shear pin 5, one end of the first shear pin 5 outside the cylindrical lower barrel 3 is fixedly provided with a first pin cap 52, the outer circumferential side of the first shear pin 5 is sleeved with a first spring 6 in the region between the first pin cap 52 and the outer surface of the cylindrical lower barrel 3, one end of the first spring 6 abuts against the first pin cap 52, and the other end abuts against the outer surface of the cylindrical lower barrel 3. When the first spring 6 is in a natural state, the first shear pin 5 corresponds to the second state, and at this time, the side end face of the first limiting shaft stopper 53 close to the center of the cylindrical lower barrel 3 has a spacing in the horizontal direction between the outer side wall of the cylindrical upper barrel 2. In the preferred embodiment, when the first spring 6 is in a natural state, the first limiting shaft stopper 53 abuts against the inner wall of the cylindrical lower barrel 3. In this scheme, when it is needed to switch the first shear pin 5 from the second state to the first state, it is only needed to press the first pin cap 52, so that the first shear pin 5 moves in the direction close to the center of the cylindrical lower barrel 3 against the spring force of the first spring 6. When it is needed to switch the first shear pin 5 from the first state to the second state, it is only needed to gently lift the cylindrical upper barrel 2 upward, and under the restoring force of the first spring 6, the first shear pin 5 can automatically move outward, so that the cylindrical upper barrel 2 can be lowered into the cylindrical lower barrel 3.

[0035] To make the structure more reliable, the outer side wall of the first shear pin 5 at one end inside the cylindrical lower barrel 3 is provided with a first arc-shaped clamping groove 51, and the lower end face of the cylindrical upper barrel 2 has a first arc-shaped protrusion 21 arranged in a ring shape. When the lower end of the cylindrical upper barrel 2 is supported and fixed to the top end of the cylindrical lower barrel 3 by the first shear pin 5, the first arc-shaped protrusion 21 and the first arc-shaped clamping groove 51 form a clamping fit.

[0036] The number of the first shear pin 5 can be flexibly set. To make the structure more reliable, two first shear pins 5 are provided and symmetrically distributed relative to the center axis of the cylindrical lower barrel 3.

[0037] In order to further facilitate transportation, a gap is formed between the outer wall of the ring 12 in the barrel top frame 1 and the inner wall of the cylindrical upper barrel 2, a plurality of second through holes 22 are arranged in a ring shape and spaced apart on the upper end of the side wall of the cylindrical upper barrel 2, and each second through hole 22 is matched and connected with a second shear pin 7. The second shear pin 7 can move along the axial direction of the second through hole 22 to switch the second shear pin 7 between a first state and a second state. When the second shear pin 7 is in the first state, the lower end of the ring 12 is supported and fixed to the top end of the cylindrical upper barrel 2 through the second shear pin 7. When the second shear pin 7 is in the second state, the lower end of the ring 12 is supported and fixed through the barrel bottom 4 or through the protrusion at the lower end of the inner wall of the cylindrical upper barrel 2. Figure 1 、 Figure 3 、 Figure 4 The two working states shown in FIGS. 1 and 2 are that the lower end of the ring 12 is supported and fixed to the top end of the cylindrical upper barrel 2 through the second shear pin 7. Figure 5 and Figure 6 The working state shown in FIG. 3 is that the lower end of the ring 12 is supported and fixed through the protrusion at the lower end of the inner wall of the cylindrical upper barrel 2. After the above structure is designed, when the cable barrel is in the transportation process, the second shear pin 7 can also be switched to the second state, and the lower end of the ring 12 is supported and fixed through the barrel bottom 4 or through the protrusion at the lower end of the inner wall of the cylindrical upper barrel 2. At this time, most of the barrel top frame 1 can be hidden in the cylindrical upper barrel 2, or even completely hidden in the cylindrical upper barrel 2, thereby saving the transportation space and reducing the transportation cost. Figure 5 In the preferred embodiment shown in FIG. 4, the barrel top frame 1 can be completely hidden in the cylindrical upper barrel 2. The ring 12 in this embodiment is the part with the largest diameter value of the outer wall of the barrel top frame 1.

[0038] The working principle of the second shear pin 7 is the same as that of the first shear pin 5. In order to make the structure simple and reliable and easy to operate, in the preferred embodiment, the axis of the second shear pin 7 is arranged horizontally, the second shear pin 7 forms a sliding fit with the second through hole 22, the end of the second shear pin 7 inside the cylindrical upper barrel 2 is fixedly connected with a second limiting shaft stop 73 at the end face, the upper end of the second limiting shaft stop 73 is protruding relative to the outer side wall of the second shear pin 7, the end of the second shear pin 7 outside the cylindrical upper barrel 2 is fixedly provided with a second pin cap 72, the outer circumferential side of the second shear pin 7 is sleeved with a second spring 8 in the region between the second pin cap 72 and the outer surface of the cylindrical upper barrel 2, one end of the second spring 8 abuts against the second pin cap 72, and the other end abuts against the outer surface of the cylindrical upper barrel 2. When the second spring 8 is in a natural state, the second shear pin 7 corresponds to the second state, and at this time, the side end face of the second limiting shaft stop 73 close to the center of the cylindrical upper barrel 2 has a spacing in the horizontal direction between the outer side wall of the ring 12. The outer side wall of the second shear pin 7 is provided with a second arc-shaped clamping groove 71 at the end inside the cylindrical upper barrel 2, and the lower end face of the ring 12 has a second arc-shaped protrusion 13 arranged in a ring shape. When the lower end of the ring 12 is supported and fixed to the top end of the cylindrical upper barrel 2 by the second shear pin 7, the second arc-shaped protrusion 13 forms a clamping fit with the second arc-shaped clamping groove 71. Two second shear pins 7 are provided and symmetrically distributed relative to the central axis of the cylindrical upper barrel 2. In the preferred scheme, when the second spring 8 is in a natural state, the second limiting shaft stop 73 abuts against the inner wall of the cylindrical upper barrel 2. In this scheme, when it is needed to switch the second shear pin 7 from the second state to the first state, it is only needed to press the second pin cap 72, so that the second shear pin 7 moves in the direction close to the center of the cylindrical upper barrel 2 against the spring force of the second spring 8. When it is needed to switch the second shear pin 7 from the first state to the second state, it is only needed to gently lift the barrel top frame 1 upwards, and under the restoring force of the second spring 8, the second shear pin 7 can automatically move outward, so that the barrel top frame 1 can be lowered into the cylindrical upper barrel 2.

[0039] In order to make the structure simple and reliable, the barrel bottom 4 and the cylindrical lower barrel 3 are fixedly connected as a whole, and a plurality of water leakage holes 41 are formed on the barrel bottom 4. On the one hand, the overall weight of the barrel bottom 4 can be reduced, and on the other hand, water collection inside the cable barrel can be prevented.

[0040] Preferably, the side wall of the top barrel body is provided with a hollow structure 14, which can reduce the overall weight of the barrel top frame 1 and facilitate transportation.

Claims

1. A height-adjustable cable drum, comprising a drum top frame (1), a cylindrical upper drum (2), a cylindrical lower drum (3) and a drum bottom (4), the drum bottom (4) is installed at the bottom of the cylindrical lower drum (3), the drum top frame (1) comprises a top drum body with a waisted ring structure (11), a ring (12) is coaxially fixed at the lower end of the top drum body, the inner wall of the ring (12) is sleeved on the top end of the cylindrical upper drum (2), and the top end of the cylindrical upper drum (2) supports and fixes the drum top frame (1); the outer wall diameter of the cylindrical upper drum (2) is smaller than the inner wall diameter of the cylindrical lower drum (3), and a gap fit is formed between the outer wall of the cylindrical upper drum (2) and the inner wall of the cylindrical lower drum (3), characterized in that: The side wall upper end of the cylindrical lower barrel (3) is provided with a plurality of first through holes (31) arranged in a ring shape at intervals, each first through hole (31) is matched and connected with a first shear pin (5), the first shear pin (5) can move along the axial direction of the first through hole (31) to switch between the first state and the second state, when the first shear pin (5) is in the first state, the lower end of the cylindrical upper barrel (2) is supported and fixed to the top end of the cylindrical lower barrel (3) through the first shear pin (5), when the first shear pin (5) is in the second state, the lower end of the cylindrical upper barrel (2) is supported and fixed through the barrel bottom (4) or through the protrusion at the lower end of the inner wall of the cylindrical lower barrel (3).

2. The height-adjustable cable drum of claim 1, wherein: The axis of the first shear pin (5) is arranged horizontally, the first shear pin (5) is in sliding fit with the first through hole (31), the end of the first shear pin (5) inside the cylindrical lower barrel (3) is fixedly connected with a first limiting shaft stop piece (53) at the end face, the upper end of the first limiting shaft stop piece (53) is arranged in protrusion relative to the outer side wall of the first shear pin (5), the end of the first shear pin (5) outside the cylindrical lower barrel (3) is fixedly provided with a first pin cap (52), the outer circumferential side of the first shear pin (5) is sleeved with a first spring (6) in the region between the first pin cap (52) and the outer surface of the cylindrical lower barrel (3), one end of the first spring (6) abuts against the first pin cap (52), the other end abuts against the outer surface of the cylindrical lower barrel (3), when the first spring (6) is in the natural state, the first shear pin (5) corresponds to the second state, and at this time, the side end face of the first limiting shaft stop piece (53) close to the center of the cylindrical lower barrel (3) has a spacing in the horizontal direction between the outer side wall of the cylindrical upper barrel (2).

3. The height adjustable cable drum of claim 2, wherein: The outer side wall of the first shear pin (5) is provided with a first arc-shaped clamping groove (51) at the end inside the cylindrical lower barrel (3), the lower end face of the cylindrical upper barrel (2) has a first arc-shaped protrusion (21) arranged in a ring shape, when the lower end of the cylindrical upper barrel (2) is supported and fixed to the top end of the cylindrical lower barrel (3) through the first shear pin (5), the first arc-shaped protrusion (21) is in clamping fit with the first arc-shaped clamping groove (51).

4. The height adjustable cable drum of claim 1, wherein: The first shear pin (5) is provided with two, and is arranged symmetrically relative to the central axis of the cylindrical lower barrel (3).

5. A height adjustable cable drum according to any one of claims 1 to 4, characterised in that: The outer wall of the ring (12) in the barrel top frame (1) is in gap fit with the inner wall of the cylindrical upper barrel (2), the side wall upper end of the cylindrical upper barrel (2) is provided with a plurality of second through holes (22) arranged in a ring shape at intervals, each second through hole (22) is matched and connected with a second shear pin (7), the second shear pin (7) can move along the axial direction of the second through hole (22) to switch between the first state and the second state, when the second shear pin (7) is in the first state, the lower end of the ring (12) is supported and fixed to the top end of the cylindrical upper barrel (2) through the second shear pin (7), when the second shear pin (7) is in the second state, the lower end of the ring (12) is supported and fixed through the barrel bottom (4) or through the protrusion at the lower end of the inner wall of the cylindrical upper barrel (2).

6. The height adjustable cable drum of claim 5, wherein: The axis of the second shear pin (7) is horizontally arranged, the second shear pin (7) forms a sliding fit with the second through hole (22), one end of the second shear pin (7) inside the cylindrical upper barrel (2) is fixedly connected with a second limiting shaft stop piece (73) at an end face, the upper end of the second limiting shaft stop piece (73) is protrudingly arranged relative to the outer side wall of the second shear pin (7), one end of the second shear pin (7) outside the cylindrical upper barrel (2) is fixedly provided with a second pin cap (72), the outer circumferential side of the second shear pin (7) is sleeved with a second spring (8) in the region between the second pin cap (72) and the outer surface of the cylindrical upper barrel (2), one end of the second spring (8) abuts against the second pin cap (72), and the other end abuts against the outer surface of the cylindrical upper barrel (2), when the second spring (8) is in a natural state, the second shear pin (7) corresponds to the second state, and at this time, the second limiting shaft stop piece (73) has a spacing in the horizontal direction between the side end face close to the center of the cylindrical upper barrel (2) and the outer side wall of the ring (12).

7. The height adjustable cable drum of claim 6, wherein: The outer side wall of the second shear pin (7) is provided with a second arc-shaped clamping groove (71) at one end inside the cylindrical upper barrel (2), and the lower end face of the ring (12) has a second arc-shaped protrusion (13) arranged in a ring shape, when the lower end of the ring (12) is supported and fixed to the top end of the cylindrical upper barrel (2) through the second shear pin (7), the second arc-shaped protrusion (13) forms a clamping fit with the second arc-shaped clamping groove (71).

8. The height adjustable cable drum of claim 5, wherein: The second shear pin (7) is provided with two, and is symmetrically distributed relative to the central axis of the cylindrical upper barrel (2).

9. The height adjustable cable drum according to any one of claims 1 to 4, characterized in that: The barrel bottom (4) and the cylindrical lower barrel (3) are fixedly connected into an integral whole, a plurality of water leakage holes (41) are formed in the barrel bottom (4).

10. The height adjustable cable drum according to any one of claims 1 to 4, characterized in that: The side wall of the top barrel body is provided with a hollow structure (14).

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