Sheath cleaning device and sheath cleaning machine

Abstract

The utility model discloses a sheath cleaning device and a sheath cleaning machine, and relates to the technical field of cleaning equipment. A sheath tensioning unit and a cleaning pipe are mounted on the mounting plate; the sheath tensioning unit comprises a sheath tensioning mechanism, a tensioning driving mechanism and a tensioning rotating mechanism; the sheath tensioning mechanism is horizontally mounted on one side of the mounting plate, and the cleaning pipe and the sheath tensioning mechanism are arranged on the same side and in the same direction; the tensioning driving mechanism is mounted on the other side of the mounting plate corresponding to the sheath tensioning mechanism, and the tensioning driving mechanism and the sheath tensioning mechanism are coaxially arranged; the tensioning rotating mechanism and the tensioning driving mechanism are arranged on the same side and located below the tensioning driving mechanism, and the tensioning rotating mechanism is in power connection with the sheath tensioning mechanism. Gypsum adhered to the sheath can be removed, manual operation is replaced, the labor intensity of operators is reduced, the automation degree is high, and the cleaning efficiency is improved. Meanwhile, the utility model further discloses a sheath cleaning machine.

Description

TECHNICAL FIELD

[0001] The utility model relates to cleaning equipment technical field especially, relate to sheath cleaning device and sheath cleaning machine. BACKGROUND

[0002] Lost-wax casting (also known as investment casting or lost-wax process casting) is an ancient metal casting technique that can be used to produce metal parts with highly complex geometrical shapes. This method is mostly used for making gold and silver jewelry and other art works, but is also widely used in industrial fields, such as the manufacture of high-precision parts like blades of aircraft engines and parts of medical devices.

[0003] In the process of making jewelry, first, one or more models (i.e. wax trees) are made from wax, and then the wax trees are placed in a steel cup and filled with a viscous plaster liquid to wrap the wax trees. After the wax trees are completely wrapped, the entire steel cup with the wax trees is heated to melt the wax trees and flow out, and a cavity mold is formed in the plaster. Then, a heated metal liquid is poured into the cavity to fill the space of the original wax mold and cool and solidify therein. After the metal is completely cooled and hardened, the outer plaster is knocked down to obtain the final jewelry.

[0004] In order to facilitate the evacuation of the steel cup after the plaster is filled, and to facilitate the rapid drainage of the interior of the steel cup during the later cleaning of the steel cup, a plurality of through holes are provided on the steel cup. However, in order to prevent the plaster from flowing out of the through holes during the filling of the plaster, a sheath needs to be first sleeved on the steel cup before filling.

[0005] The sheath is a cylindrical structure made of elastic material. The gap between the woven lines can allow air to pass through but is not sufficient for the plaster to flow out, so it can block the plaster from flowing out but does not affect the filling of the plaster. During each casting, the plaster is prone to spreading from the pouring port of the steel cup to the sheath, affecting the air permeability and use effect of the sheath. Therefore, the sheath needs to be cleaned. Traditionally, manual cleaning is used, but manual cleaning not only has high labor intensity and high labor cost, but also has low efficiency, prolonging the preparation time of casting and slowing down the overall production rhythm, thereby reducing the production efficiency. TECHNICAL SOLUTION

[0006] Therefore, the technical problem to be solved by the utility model is to provide a sheath cleaning device and a sheath cleaning machine that can remove the plaster adhered to the sheath, replace manual operation, reduce the labor intensity of the operator, have high automation degree, and improve the cleaning efficiency.

[0007] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0008] The sheath cleaning device comprises a mounting plate, at least one sheath tensioning unit and at least one cleaning pipe are installed on the mounting plate.

[0009] The sheath tensioning unit comprises a sheath tensioning mechanism, a tensioning driving mechanism and a tensioning rotating mechanism;

[0010] The sheath tensioning mechanism is horizontally installed on one side of the mounting plate, and is used for tensioning fixing the sheath.

[0011] The tensioning driving mechanism is installed on the other side of the mounting plate corresponding to the sheath tensioning mechanism, and is coaxially arranged with the sheath tensioning mechanism.

[0012] The tensioning rotating mechanism is arranged on the same side of the tensioning driving mechanism and below the tensioning driving mechanism.

[0013] Preferably, the sheath tensioning mechanism comprises a tensioning sleeve, a tensioning driving shaft and an inner support tensioning assembly.

[0014] The tensioning sleeve is rotationally installed on the mounting plate and penetrates the mounting plate.

[0015] The tensioning driving shaft is slidably arranged in the tensioning sleeve and extends out of the tensioning sleeve at both ends.

[0016] The inner support tensioning assembly is installed on the tensioning sleeve and is hingedly connected to the other end of the tensioning driving shaft.

[0017] Preferably, a support sleeve is fixedly arranged on the mounting plate, and the tensioning sleeve is rotationally installed in the support sleeve.

[0018] Preferably, the inner support tensioning assembly comprises an inner hinged seat, an outer hinged seat and a plurality of tensioning claws hingedly connected between the inner hinged seat and the outer hinged seat.

[0019] The inner hinged seat and the outer hinged seat are the same structure and have a spacing.

[0020] The tensioning claws are equidistantly arranged around the axis of the tensioning sleeve.

[0021] The linkage hinge seat is hingedly connected between the tightener driving shaft and the outer connecting piece through a linkage connecting piece.

[0022] The positions and quantities of the tightener claw, the inner connecting piece, the outer connecting piece and the linkage connecting piece are one-to-one corresponding.

[0023] Preferably, the inner end of the tightener claw is provided with an integrally-formed sheath stopper, and the outer end of the tightener claw is provided with a guide part obliquely arranged, the end of the guide part being inclined towards the side close to the axis of the tightener sleeve.

[0024] Preferably, the tightener driving mechanism comprises a telescopic cylinder and a rotary shaft assembly.

[0025] The rotary shaft assembly comprises a cylinder shaft mounting seat and a cylinder shaft connecting sleeve threadedly connected with the cylinder shaft mounting seat, the cylinder shaft connecting sleeve being fixedly arranged on the piston rod of the telescopic cylinder through the cylinder shaft mounting seat, one end of the tightener driving shaft being telescopically arranged in the cylinder shaft connecting sleeve and rotationally matched with the cylinder shaft connecting sleeve, and a stop ring being arranged on the tightener driving shaft and located between the piston rod of the telescopic cylinder and the bottom of the cylinder shaft connecting sleeve.

[0026] Preferably, the tightener rotating mechanism comprises a rotary motor and a transmission assembly.

[0027] The transmission assembly comprises a driving pulley, a driven pulley and a synchronous belt connected between the driving pulley and the driven pulley, the driving pulley being fixedly connected with the output shaft of the rotary motor, and the driven pulley being fixedly connected with the tightener sleeve.

[0028] The sheath cleaning machine comprises a rack, and the sheath cleaning device is arranged on the rack.

[0029] Preferably, a high-pressure water pump is arranged on the rack, the water inlet end of the high-pressure water pump being communicated with an external water source, and the water outlet end of the high-pressure water pump being communicated with the cleaning pipe through a water conveying pipe.

[0030] An adjusting valve is arranged on the water conveying pipe.

[0031] Preferably, a sewage basin, a water blocking cover and a sheath placing bin are arranged on the rack.

[0032] The sewage basin is arranged below the sheath tightener mechanism and is symmetrically arranged with the cleaning pipe.

[0033] The water blocking cover is arranged outside the cleaning pipe and the sheath tightener mechanism, and the outer end of the water blocking cover is provided with an opening.

[0034] After the above technical scheme is adopted, the sheath cleaning device has the following advantages:

[0035] The sheath cleaning device of the application comprises a mounting plate; at least one sheath tensioning unit and at least one cleaning pipe are mounted on the mounting plate; the sheath tensioning unit can internally support and tension fix the sheath, and the cleaning pipe can spray water to clean the sheath after being tensioned, thereby replacing the traditional manual cleaning mode and saving time and labor.

[0036] The sheath tensioning unit comprises a sheath tensioning mechanism, a tensioning driving mechanism and a tensioning rotating mechanism; the sheath tensioning mechanism is horizontally mounted on one side of the mounting plate, and is used for tensioning and fixing the sheath; the cleaning pipe is arranged on the same side and in the same direction as the sheath tensioning mechanism, and is mounted above the sheath tensioning mechanism; the tensioning driving mechanism is mounted on the other side of the mounting plate corresponding to the sheath tensioning mechanism, and is coaxially arranged with the sheath tensioning mechanism; and the tensioning driving mechanism is used for driving the sheath tensioning mechanism to tension or release.

[0037] After the sheath to be cleaned is sleeved on the sheath tensioning mechanism by manual operation, the tensioning driving mechanism drives the sheath tensioning mechanism to internally support and tension fix the sheath, so as to meet the requirement of fixing the sheath; meanwhile, because the sheath is made of elastic material and is woven, the internal volume of the sheath is increased and the gap between the woven lines of the sheath is increased when the sheath is internally supported and fixed, so that the gypsum attached to the sheath can be cracked and cracked, the gypsum can be cleaned by the cleaning pipe, and the cleaning effect and cleaning efficiency are improved.

[0038] The tensioning rotating mechanism is arranged on the same side of the tensioning driving mechanism and below the tensioning driving mechanism, is power-connected with the sheath tensioning mechanism, and is used for driving the sheath tensioning mechanism to rotate around the axis thereof. When the sheath is cleaned, the tensioning rotating mechanism drives the sheath to rotate around the axis through the sheath tensioning mechanism, so that all the gypsum attached to the sheath can be cleaned by the cleaning pipe, the cleaning comprehensiveness and integrity are ensured, the automation degree is high, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] The utility model will be further explained in connection with the drawings and embodiments.

[0040] Figure 1 Fig. 1 is a structural schematic view of a sheath cleaning device according to an embodiment of the utility model;

[0041] Figure 2 Fig. 2 is a structural schematic view of the sheath after being tensioned;

[0042] Figure 3 Fig. 3 is a front view of the sheath cleaning device of Fig. 1; Figure 1

[0043] Figure 4 Fig. 4 is an A-A sectional view of the sheath cleaning device of Fig. 1; Figure 3

[0044] Figure 5 is​​Figure 4 B part enlarged view of figure 1;

[0045] Figure 6 C part enlarged view of figure 1; Figure 5

[0046] Figure 7 The explosion view of the sheath cleaning device of the embodiment one of the utility model;

[0047] Figure 8 The partial sectional view of the sheath cleaning machine of the embodiment two of the utility model;

[0048] In the figure:

[0049] 1, mounting plate;

[0050] 2, cleaning pipe;

[0051] 3, sheath tensioning mechanism; 31, tensioning sleeve; 32, tensioning drive shaft; 33, inner support tensioning assembly; 331, inner hinged seat; 332, outer hinged seat; 333, tensioning claw; 3331, sheath stop block; 3332, guide part; 334, inner connecting piece; 335, outer connecting piece; 336, linkage hinged seat; 337, linkage connecting piece; 34, support sleeve;

[0052] 4, tensioning drive mechanism; 41, telescopic cylinder; 42, rotary coupling assembly; 421, cylinder shaft mounting seat; 422, cylinder shaft connecting sleeve; 423, stop ring;

[0053] 5, tensioning rotary mechanism; 51, rotary motor; 52, transmission assembly; 521, driving pulley; 522, driven pulley;

[0054] 6, sheath;

[0055] 7, rack; 71, high-pressure water pump; 72, regulating valve; 73, sewage basin; 74, water baffle; 75, sheath placing bin. DETAILED DESCRIPTION

[0056] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following is combined with the figure and embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0057] Embodiment one

[0058] As Figures 1 to 7 ​The utility model discloses a sheath cleaning device, which comprises a mounting plate 1, at least one sheath expansion unit and at least one cleaning pipe 2 are installed on the mounting plate 1, the mounting plate 1 is vertically arranged and used for supporting the sheath expansion unit and the cleaning pipe 2, the sheath expansion unit can internally support and expand the sheath 6 for fixing, and the cleaning pipe 2 can spray water on the expanded sheath 6 for cleaning, thereby replacing the traditional manual cleaning method and saving time and effort.

[0059] The sheath expansion unit comprises a sheath expansion mechanism 3, an expansion driving mechanism 4 and an expansion rotating mechanism 5, wherein the sheath expansion mechanism 3 is horizontally installed on one side of the mounting plate 1, the sheath expansion mechanism 3 is used for expanding and fixing the sheath 6, the cleaning pipe 2 is arranged on the same side and in the same direction as the sheath expansion mechanism 3, and the cleaning pipe 2 is installed above the sheath expansion mechanism 3; the cleaning pipe 2 is connected with a high-pressure water source outside, and a plurality of cleaning nozzles are installed on the cleaning pipe 2 and arranged on the side of the sheath expansion mechanism 3.

[0060] The expansion driving mechanism 4 is installed on the other side of the mounting plate 1 corresponding to the sheath expansion mechanism 3, the expansion driving mechanism 4 is coaxially arranged with the sheath expansion mechanism 3, and the expansion driving mechanism 4 is used for driving the sheath expansion mechanism 3 to expand or release.

[0061] After the sheath 6 to be cleaned is sleeved on the sheath expansion mechanism 3 by manual operation, the expansion driving mechanism 4 drives the sheath expansion mechanism 3 to internally support the sheath 6 for expansion and fixing, thereby meeting the requirement of fixing, and at the same time, because the sheath 6 is knitted by elastic material, the internal volume of the sheath 6 is increased and the gap between the knitted lines constituting the sheath 6 is increased when the sheath 6 is internally supported and fixed, so that the gypsum attached to the sheath 6 can be cracked and cracked, the cleaning pipe 2 can clean the gypsum, and the cleaning effect and the cleaning efficiency are improved.

[0062] The expansion rotating mechanism 5 is arranged on the same side of the expansion driving mechanism 4 and below the expansion driving mechanism 4, the expansion rotating mechanism 5 is power-connected with the sheath expansion mechanism 3, and the expansion rotating mechanism 5 is used for driving the sheath expansion mechanism 3 to rotate around the axis line thereof.

[0063] When the sheath 6 is cleaned, the expansion rotating mechanism 5 drives the sheath 6 to rotate around the axis line through the sheath expansion mechanism 3, so that all the gypsum attached to the sheath 6 can be cleaned by the cleaning pipe 2, the comprehensiveness and integrity of cleaning are ensured, the degree of automation is high, and the production efficiency is improved.

[0064] In the embodiment, the sheath expansion mechanism 3 comprises an expansion sleeve 31, an expansion driving shaft 32 and an internal support expansion assembly 33.

[0065] The tightening sleeve 31 is rotationally mounted on the mounting plate 1 and penetrates the mounting plate 1, one end of the tightening sleeve 31 is connected with the tightening rotating mechanism 5; in order to facilitate the tightening rotating mechanism 5 to drive the tightening sleeve 31 to rotate, thereby driving the inner support tightening assembly 33 to rotate, the support sleeve 34 is fixedly arranged on the mounting plate 1, and the tightening sleeve 31 is rotationally mounted in the support sleeve 34.

[0066] The tightening driving shaft 32 is slidingly arranged in the tightening sleeve 31 and extends out of the tightening sleeve 31 at both ends, one end of the tightening driving shaft 32 is connected with the tightening driving mechanism 4; the inner support tightening assembly 33 is mounted on the tightening sleeve 31, and the other end of the tightening driving shaft 32 is hingedly connected with the inner support tightening assembly 33, and the inner support tightening assembly 33 is driven to outwardly tighten or inwardly release when the tightening driving shaft 32 moves along the axis thereof.

[0067] The tightening driving mechanism 4 drives the tightening driving shaft 32 to move axially reciprocatingly, the tightening driving shaft 32 drives the inner support tightening assembly 33 to move in the same direction, because the inner support tightening assembly 33 is mounted on the tightening sleeve 31, when the inner support tightening assembly 33 moves to the side away from the mounting plate 1, it is internally retracted to release the protective sleeve 6; when it moves to the side close to the mounting plate 1, it is externally supported to tighten the protective sleeve 6, and the tightened protective sleeve 6 has a polygonal structure.

[0068] The inner support tightening assembly 33 comprises an inner hinged seat 331, an outer hinged seat 332 and a plurality of tightening claws 333 hingedly connected between the inner hinged seat 331 and the outer hinged seat 332.

[0069] The inner hinged seat 331 and the outer hinged seat 332 are the same structure and have a spacing; the tightening claws 333 are equidistantly arranged around the axis of the tightening sleeve 31, the inner ends of the tightening claws 333 are hingedly connected with the inner hinged seat 331 through inner connecting pieces 334, and the outer ends of the tightening claws 333 are hingedly connected with the outer hinged seat 332 through outer connecting pieces 335.

[0070] The linkage hinged seat 336 is mounted on the tightening driving shaft 32, and the linkage hinged seat 336 is hingedly connected with the outer connecting piece 335 through a linkage connecting piece 337; the positions and quantities of the tightening claws 333, the inner connecting pieces 334, the outer connecting pieces 335 and the linkage connecting piece 337 are one-to-one corresponding.

[0071] When the tightening driving shaft 32 moves reciprocatingly along the axis thereof, the linkage hinged seat 336 is driven to move, when the linkage hinged seat 336 moves to the side away from the mounting plate 1, the linkage hinged seat 336 drives the outer connecting piece 335 to internally retract through the linkage connecting piece 337, thereby driving the tightening claws 333 to internally retract at the same time; when the linkage hinged seat 336 moves to the side close to the mounting plate 1, the tightening claws 333 are reversely driven to externally support, which is opposite to the internally retraction action, and details are not described herein.

[0072] In order to facilitate the worker to accurately sleeve the sheath 6 on the tensioning claw 333, prevent excessive sleeve and too short sleeve, and ensure the comprehensiveness of cleaning, the inner end of the tensioning claw 333 is provided with an integrally formed sheath stop block 3331, which can limit the sheath 6 when the sheath 6 is sleeved on the tensioning claw 333, proving that it is sleeved at the limit position of the tensioning claw 333.

[0073] In order to facilitate the sleeve of the sheath 6 on the tensioning claw 333, the outer end of the tensioning claw 333 is provided with a guide portion 3332 which is obliquely arranged, the end of the guide portion 3332 is inclined to the side close to the axis of the tensioning sleeve 31, and the arrangement of the guide portion 3332 can facilitate the worker to easily sleeve the sheath 6 on the tensioning claw 333.

[0074] In the embodiment, the tensioning driving mechanism 4 includes a telescopic cylinder 41 and a rotary shaft coupling assembly 42.

[0075] The rotary shaft coupling assembly 42 includes a cylinder shaft mounting seat 421 and a cylinder shaft connecting sleeve 422 threadedly connected thereto, the cylinder shaft connecting sleeve 422 is fixedly arranged on the piston rod of the telescopic cylinder 41 through the cylinder shaft mounting seat 421, one end of the tensioning driving shaft 32 is inserted into the cylinder shaft connecting sleeve 422 and rotationally matched therewith, and a stop ring 423 is arranged on the tensioning driving shaft 32 and located between the output shaft of the telescopic cylinder 41 and the sleeve bottom of the cylinder shaft connecting sleeve 422.

[0076] When the piston rod of the telescopic cylinder 41 extends outward, it directly abuts against the stop ring 423 to drive the tensioning driving shaft 32 to move together, and when the piston rod of the telescopic cylinder 41 retracts inward, the stop ring 423 can be pulled by the cylinder shaft connecting sleeve 422 to drive the tensioning driving shaft 32 to move together, which meets the requirement of driving the tensioning driving shaft 32 to move axially, and at the same time does not affect the rotation of the tensioning driving shaft 32.

[0077] In the embodiment, the tensioning rotating mechanism 5 includes a rotary motor 51 and a transmission assembly 52. The transmission assembly 52 includes a driving pulley 521, a driven pulley 522 and a synchronous belt connected therebetween, the driving pulley 521 is fixedly connected with the output shaft of the rotary motor 51, and the driven pulley 522 is fixedly connected with the tensioning sleeve 31.

[0078] Under the drive of the rotary motor 51, the driven pulley 522 drives the tensioning sleeve 31 to rotate, the tensioning sleeve 31 drives the inner hinge seat 331 and the outer hinge seat 332 to rotate together, drives the tensioning claw 333 to rotate together through the corresponding inner connecting piece 334 and the outer connecting piece 335, realizes driving the sheath 6 to rotate together, and meets the requirement of comprehensive cleaning.

[0079] When the tightening claw 333 rotates, the outer connecting piece 335 drives the linkage connecting piece 337 to rotate, the linkage connecting piece 336 drives the tightening driving shaft 32 to rotate, because the tightening driving shaft 32 is provided with the stop ring 423 and is located between the output shaft of the telescopic cylinder 41 and the sleeve bottom of the cylinder shaft connecting sleeve 422, therefore, the rotation of the tightening driving shaft 32 is not affected by the telescopic cylinder 41, the cylinder shaft mounting seat 421 and the cylinder shaft connecting sleeve 422, thus, the tightening driving shaft 32 can rotate and axially reciprocate.

[0080] Embodiment two

[0081] As shown in Figure 1 , Figure 7 and Figure 8 together, the embodiment discloses a sheath cleaning machine, which comprises a rack 7, and the sheath cleaning device in embodiment one is installed on the rack 7.

[0082] A high-pressure water pump 71 is installed on the rack 7, the water inlet end of the high-pressure water pump 71 is communicated with an external water source, and the water outlet end of the high-pressure water pump 71 is communicated with the cleaning pipe 2 through a water conveying pipe (not shown in the figure); preferably, an adjusting valve 72 is installed on the water conveying pipe.

[0083] The high-pressure water pump 71 pumps the external water source into the cleaning pipe 2 to clean the sheath 6, and in the cleaning process, the adjusting valve 72 controls the flow and water speed to meet the cleaning intensity control, which is adjustable and improves the use effect.

[0084] A sewage basin 73, a water baffle 74 and a sheath placing bin 75 are installed on the rack 7; wherein the sheath placing bin 75 is used for placing the sheath 6 to be cleaned or the cleaned sheath 6.

[0085] The sewage basin 73 is installed below the sheath tightening mechanism 3 and is symmetrical to the position of the cleaning pipe 2; the sewage basin 73 is used for containing the sewage generated after the cleaning pipe 2 cleans the sheath 6, so as to prevent the surrounding environment from being polluted. The water baffle 74 is arranged outside the cleaning pipe 2 and the sheath tightening mechanism 3, because the sheath 6 is in a rotating state during cleaning, the cleaning water sprayed on the sheath 6 is thrown out by the sheath 6, thus, the water baffle 74 is arranged to block the cleaning water, so as to prevent the surrounding environment from being polluted. The outer end of the water baffle 74 is provided with an opening, so as to meet the action of sleeving the sheath 6 on the tightening claw 333 and taking off the sheath 6 through the opening.

[0086] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sheath cleaning device comprising a mounting plate; characterized in that, At least one sheath expansion unit and at least one cleaning pipe are installed on the mounting plate; The sheath expansion unit comprises a sheath expansion mechanism, an expansion driving mechanism and an expansion rotating mechanism; The sheath expansion mechanism is horizontally installed on one side of the mounting plate, and is used for expanding and fixing the sheath. The cleaning pipe is arranged on the same side and in the same direction of the sheath expansion mechanism, and is installed above the sheath expansion mechanism. The expansion driving mechanism is installed on the other side of the mounting plate corresponding to the sheath expansion mechanism, and is coaxially arranged with the sheath expansion mechanism.

2. The boot cleaning apparatus of claim 1, wherein, The expansion driving mechanism is used for driving the sheath expansion mechanism to expand or release. The expansion rotating mechanism is arranged on the same side of the expansion driving mechanism and below the expansion driving mechanism. The expansion rotating mechanism is power-connected with the sheath expansion mechanism, and is used for driving the sheath expansion mechanism to rotate around its axis. The sheath expansion mechanism comprises an expansion sleeve, an expansion driving shaft and an inner support expansion assembly; 3. The boot cleaning apparatus of claim 2, wherein, The expansion sleeve is rotationally installed on the mounting plate and penetrates through the mounting plate.

4. The boot cleaning apparatus of claim 2, wherein, One end of the expansion sleeve is power-connected with the expansion rotating mechanism. The expansion driving shaft is slidingly arranged in the expansion sleeve and extends out of the expansion sleeve at both ends. The inner support expansion assembly is installed on the expansion sleeve and is hinged with the other end of the expansion driving shaft. When the expansion driving shaft moves along its axis, the inner support expansion assembly is driven to expand outward or release inward. A support sleeve is fixedly arranged on the mounting plate, and the expansion sleeve is rotationally installed in the support sleeve.

5. The jacket cleaning apparatus of claim 4, wherein, The inner support expansion assembly comprises an inner hinge seat, an outer hinge seat and a plurality of expansion claws hinged between the inner hinge seat and the outer hinge seat; 6. The jacket cleaning apparatus of claim 2, wherein, The inner hinge seat and the outer hinge seat are the same structure and have a spacing; The expansion claws are equidistantly arranged around the axis of the expansion sleeve.

7. The jacket cleaning apparatus of claim 2, wherein, The inner end of the expansion claw is hinged with the inner hinge seat through an inner connecting piece. The outer end of the expansion claw is hinged with the outer hinge seat through an outer connecting piece. The expansion driving shaft is provided with a linkage hinge seat, and the linkage hinge seat is hinged with the outer connecting piece through a linkage connecting piece. The positions and quantities of the expansion claw, the inner connecting piece, the outer connecting piece and the linkage connecting piece are one-to-one corresponding. The inner end of the expansion claw is provided with an integrally formed sheath stop block. The outer end of the expansion claw is provided with an obliquely arranged guide portion, and the end of the guide portion is inclined towards the axis of the expansion sleeve. The expansion driving mechanism comprises a telescopic cylinder and a rotating shaft assembly; The rotating shaft assembly comprises a cylinder shaft mounting seat and a cylinder shaft connecting sleeve threadedly connected with the cylinder shaft mounting seat. The cylinder shaft connecting sleeve is fixedly arranged on the piston rod of the telescopic cylinder through the cylinder shaft mounting seat. One end of the expansion driving shaft is inserted into the cylinder shaft connecting sleeve and rotationally matched with the cylinder shaft connecting sleeve. The expansion driving shaft is provided with a stop ring between the piston rod of the telescopic cylinder and the bottom of the cylinder shaft connecting sleeve. The expansion rotating mechanism comprises a rotating motor and a transmission assembly; The transmission assembly comprises a driving pulley, a driven pulley and a synchronous belt connected between the two, the driving pulley is fixedly connected with the output shaft of the rotary motor, and the driven pulley is fixedly connected with the tension sleeve.

8. A sheath cleaning machine characterized by, The machine frame is provided with the sheath cleaning device as claimed in any one of claims 1 to 7.

9. The boot washing machine of claim 8, wherein, A high-pressure water pump is mounted on the machine frame, the water inlet end of the high-pressure water pump is communicated with an external water source, and the water outlet end of the high-pressure water pump is communicated with the cleaning pipe through a water delivery pipe. An adjusting valve is mounted on the water delivery pipe.

10. The boot washing machine of claim 8, wherein, A sewage basin, a water baffle and a sheath placing bin are mounted on the machine frame. The sewage basin is mounted below the sheath tensioning mechanism and is symmetrically positioned with the cleaning pipe. The water baffle is arranged outside the cleaning pipe and the sheath tensioning mechanism, and the outer end of the water baffle is provided with an opening.

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