CN217326825U

CN217326825U - Dustproof password padlock

Info

Publication number: CN217326825U
Application number: CN202220443379.3U
Authority: CN
Inventors: 郑勇进
Original assignee: Zhejiang Pujiang Plum Blossom Lock Industry Group Co ltd
Current assignee: Zhejiang Pujiang Plum Blossom Lock Industry Group Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-08-30
Anticipated expiration: 2032-03-03

Abstract

A dustproof coded padlock comprises a dustproof cover which is positioned between a lock block and a lock body and can move left and right in the lock body, the lock block is connected with the upper end of a wheel shaft in a sliding mode, the lock block can move left and right relative to the wheel shaft, a lock core assembly is provided with a rotating column which extends towards the left side of the lock block, the rotating column is provided with a convex part used for blocking the lock block from moving left and a concave part used for allowing the lock block to move left, the dustproof cover is provided with a driving inclined plane used for driving the lock block to move left, the lock block is provided with a matching inclined plane matched with the driving inclined plane, the driving inclined plane is used for extruding the matching inclined plane to enable the lock block and the wheel shaft to move downwards, the dustproof cover is provided with a covering part which is positioned at the left side of a movable end in a locking state and used for covering an insertion hole and a containing part used for containing the movable end, when the coded assembly or the coded assembly is unlocked, the wheel shaft limits the lock block to move downwards, the movable end can extrude the covering part to move left to unlock, when the lock core assembly is unlocked, the movable end can extrude the accommodating part to move so as to realize unlocking.

Description

Dustproof coded padlock

Technical Field

The utility model relates to a tool to lock field specifically is a dustproof password padlock.

Background

The existing password padlock is provided with a lock rope, and a password assembly and a lock cylinder assembly which are used for unlocking are arranged in the existing password padlock, so that unlocking can be realized through password unlocking and lock cylinder unlocking in two modes.

Please refer to fig. 1, chinese utility model patent with application number CN201821181062.7 discloses a combination padlock, which relates to the lock technical field, and the structure thereof includes a face shell (lock body), a combination component, a movable rod and a lock block, wherein the combination component, the movable rod and the lock block are all arranged in the face shell, the lock block is rotatably connected to the face shell (lock body), one end of the lock block far away from the combination component is a rotating end, and the other end is an upper locking end; when the lock is required to be locked, the password assembly pushes the movable rod (wheel shaft) to move upwards and abut against the upper locking end of the locking block, and the locking block rotates from an unlocking state to an upper locking state; when the lock needs to be unlocked in the locked state, the password is correct, the password component drives the movable rod to retract, the lock block rotates to the unlocked state from the locked state, the movable end of the lock rope is inserted into the movable lock hole to realize locking, and the movable lock hole is formed by communicating and adjoining a large ellipse (an insertion hole) and a small ellipse (a locking hole).

In the prior art, under the locking state, the insertion hole is easy to fall into large dust, so that the lockset can not work normally.

In addition, the lock body is formed by combining two lock shells, the joint of the two lock shells penetrates through the movable lock hole, and the top surface of the lock body and the top of the inner space of the lock body are uneven due to the staggered arrangement of the two lock shells, so that the movable end cannot move smoothly in the left-right moving process.

In the prior art, the code component is directly assembled into the lock body, and in the assembling process, the code adjusting wheel and the code wheel are easy to rotate relatively, so that the initial code is wrong.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dustproof password padlock can reduce the dust that falls into in the insert hole.

In order to achieve the above object, the present invention provides a dustproof combination padlock, which comprises a lock body, a lock rope, a combination assembly, a lock core assembly and a lock block, wherein the lock body is provided with a movable lock hole, the movable lock hole is an insertion hole and a locking hole which are communicated and adjacent, the lock rope is provided with a fixed end fixedly connected with the lock body and a movable end capable of being inserted into the insertion hole and locked in cooperation with the locking hole, the combination assembly comprises a wheel shaft capable of moving downwards when the combination is correct, the dustproof combination padlock further comprises a dustproof cover which is positioned between the lock block and the lock body and can move left and right in the lock body, the lock block is connected with the upper end of the wheel shaft in a sliding manner, the lock block can move left and right relative to the wheel shaft, the lock core assembly is provided with a rotary column which extends towards the left side of the lock block, the rotary column is provided with a convex part for blocking the left movement of the lock block and a concave part for allowing the left movement of the lock block, the dustproof cover is provided with a driving inclined plane used for driving the locking block to move leftwards, the locking block is provided with a matching inclined plane matched with the driving inclined plane, the driving inclined plane is used for extruding the matching inclined plane to enable the locking block and the wheel shaft to move downwards, the dustproof cover is provided with a covering part which is positioned on the left side of the movable end in a locking state and used for covering the insertion hole and a containing part used for containing the movable end, when the password assembly is locked, the wheel shaft limits the locking block to move downwards, and when the password assembly or the password assembly is unlocked, the movable end can extrude the covering part to move leftwards to realize unlocking.

In one embodiment of the utility model, the code assembly comprises a wheel shaft return spring sleeved outside the wheel shaft, a plurality of code adjusting wheels and code adjusting sleeves, the wheel shaft return spring is positioned between the upper end of the wheel shaft and the code adjusting wheel, the wheel shaft is provided with a plurality of limiting lugs matched with the code adjusting wheel, the inner circumferential surface of the code adjusting wheel is provided with an alignment notch matched with the limit lug, the outer circumferential surface of the code adjusting wheel is provided with a clutch bulge matched with the code wheel, the inner peripheral surface of the password wheel is provided with a plurality of clutch notches matched with the clutch bulges, the lower surface of the lock body is provided with a code adjusting hole matched with the code adjusting sleeve, the code adjusting sleeve is sleeved at the lower end of the wheel shaft, the code adjusting sleeve is used for extruding the code adjusting wheel to move upwards to enable the clutch bulge to be separated from the clutch notch when all the alignment notches correspond to the corresponding limiting lug positions.

In an embodiment of the present invention, the lock body includes a first lock housing and a second lock housing, the first lock housing has a cover body covering the top of the second lock housing, the cover body is configured to be inserted into the through hole of the fixed end, the movable lock hole is configured to have a top surface of the cover body, and the second lock housing is configured with a fixing notch for preventing the fixed end from being detached from the lock body.

In an embodiment of the present invention, the movable end is a ball structure, and the top of the covering portion has an insertion guide surface inclined downward to the right, and the insertion guide surface is pressed by the movable end to move rightward to expose the insertion hole.

In an embodiment of the present invention, the left end of the locking piece has a V-shape with a gradually decreasing cross-section toward the left, the recessed portion is a V-shaped notch, the lock body is provided with a first limiting portion engaged with the locking piece and the end surface of the right end of the dust cover, and the lock body is provided with a second limiting portion engaged with the end surface of the left end of the dust cover.

In an embodiment of the present invention, the lock core assembly further includes a lock core connected to the lower end of the rotation column, the lock core is provided with a torsion protrusion for driving the rotation, and the rotation column is provided with a torsion recess sleeved outside the torsion protrusion.

In one embodiment of the utility model, the cipher component also comprises a mounting rack, the outer peripheral surface of the cipher wheel is provided with a plurality of positioning depressions, the mounting rack is provided with a partition plate for partitioning the code wheel and an elastic positioning arm matched with the positioning recess, the partition plate is provided with a pair of first elastic fixing arms surrounding the outer peripheral surface of the code adjusting wheel, a first socket allowing the code adjusting wheel to be inserted is arranged between the first elastic fixing arms, the outer circumferential surface of the upper end of the code adjusting sleeve is provided with a limiting ring, the mounting frame is provided with a pair of second elastic fixing arms extending towards the outer circumferential surface of the code adjusting sleeve, a second socket allowing the code adjusting sleeve to be inserted is arranged between the pair of second elastic fixing arms, the wheel shaft return spring extrudes the code adjusting sleeve through extruding the code adjusting wheel, so that the limiting ring is abutted against the elastic positioning arm, and the mounting frame further comprises a third limiting part extending towards the upper part of the upper end of the wheel shaft.

In one embodiment of the present invention, the rotation column is provided with a rotation limiting portion for limiting a rotation range of the rotation column, and the lock body is provided with a limit fitting portion fitted with the rotation limiting portion, and the rotation limiting portion is a protrusion located on a top surface of the rotation column.

In an embodiment of the present invention, the outer peripheral surface of the middle portion of the rotation column is provided with an annular notch, and the lock body is provided with an axial fitting protrusion received in the annular notch for preventing the rotation column from moving axially.

In an embodiment of the present invention, the insertion hole is a circular hole, the locking hole is a bar-shaped hole, the upper end of the axle is a plate-shaped structure, and the locking piece is provided with a sliding guide arm extending toward the lower surface of the upper end of the axle.

The utility model discloses in, through setting up the shield, cover the patchhole under the lock-out state, can reduce the dust and enter into in the lock body.

In an embodiment of the present invention, the first lock casing of the lock body has a cover body covering the top of the second lock casing, so that the upper surface and the lower surface of the cover body are smooth planes, and the movable end can move smoothly from left to right.

In an embodiment of the present invention, the password wheel mechanism is assembled by using a mounting bracket in advance, and the first elastic fixing arm, the second elastic fixing arm, the third limiting portion fixing wheel shaft, the wheel shaft return spring, the password wheel, and the password adjusting sleeve are utilized, and the external peripheral surface of the password wheel is provided with an indicating portion for indicating the position of the alignment notch, and the positions of the password wheel and the password adjusting wheel are adjusted by means of the password adjusting sleeve, so as to prevent the initial password error.

Drawings

Fig. 1 is a sectional view of a conventional combination padlock.

Fig. 2 is a structural diagram of a dustproof combination padlock according to a first embodiment of the present invention.

Figure 3 is an exploded view of the dust-resistant combination padlock of figure 2.

Figure 4 is an exploded view of the dust-resistant combination padlock of figure 3 in another orientation.

Fig. 5 is a structural view of the first lock case of fig. 3.

Fig. 6 is a structural view of the second lock case of fig. 3.

Fig. 7 is a block diagram of the password component of fig. 3.

Figure 8 is a block diagram of the combination assembly and plug assembly of figure 3.

Fig. 9 is a structural view of the locking piece and the dust cap of fig. 3.

Figure 10 is a cross-sectional view of the dust resistant combination padlock of figure 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, in a first embodiment of the present invention, the present invention provides a dustproof combination padlock, which includes a lock body 1, a lock rope 2, a combination assembly 3, a lock core assembly 4, a lock block 5, and a dust cover 6.

The lock body 1 comprises a first lock shell 11 and a second lock shell 12, the first lock shell 11 is provided with a cover body 13 covering the top of the second lock shell 12, the cover body 13 is provided with a through hole 10b capable of being inserted into the fixed end 21, the movable lock hole 10 is provided with a top surface of the cover body 13, and the second lock shell 12 is provided with a fixing notch 10c for preventing the fixed end 21 from being separated from the lock body 1. The insertion hole 101 is a circular hole, the locking hole 102 is a strip-shaped hole, the lock body 1 is provided with a movable lock hole 10, and the movable lock hole 10 is formed by communicating and adjoining the insertion hole 101 and the locking hole 102. The lock body 1 is provided with a first limiting part 14 matched with the end faces of the right ends of the lock block 5 and the dust cover 6, and the lock body 1 is provided with a second limiting part 15 matched with the end face of the left end of the dust cover 6. The lock body 1 is provided with a limit fitting portion 17 fitted with the rotation limit portion 413.

The lock rope 2 has a fixed end 21 connected and fixed with the lock body 1 and a movable end 22 capable of being inserted into the insertion hole 101 and locked with the locking hole 102, the movable end 22 is of a spherical structure, the top of the covering part 61 is provided with an insertion guide surface 61b inclining downwards towards the right, and the insertion guide surface 61b is pressed by the movable end 22 to move towards the right to expose the insertion hole 101.

The code assembly 3 further comprises a wheel shaft return spring 3t, a plurality of code adjusting wheels 32, a plurality of code adjusting wheels 33 and a code adjusting sleeve 34, wherein the wheel shaft return spring 3t is arranged between the upper end 301 of the wheel shaft 31 and the code adjusting wheels 32, the wheel shaft 31 is provided with a plurality of limiting lugs 311 matched with the code adjusting wheels 32, the inner circumferential surface of the code adjusting wheels 32 is provided with aligning notches 320 matched with the limiting lugs 311, the outer circumferential surface of the code adjusting wheels 32 is provided with clutch protrusions 32b matched with the code adjusting wheels 33, the inner circumferential surface of the code adjusting wheels 33 is provided with a plurality of clutch notches 33a matched with the clutch protrusions 32b, the lower surface of the lock body 1 is provided with code adjusting holes 10a matched with the code adjusting sleeves 34, the code adjusting sleeves 34 are arranged at the lower end of the wheel shaft 31, and the code adjusting sleeves 34 are used for adjusting the code adjusting wheels when all the aligning notches 320 correspond to the corresponding limiting lugs 311, the pressing code wheel 32 moves upwards to make the clutch projection 32b disengage from the clutch notch 33 a.

The code assembly 3 comprises a wheel shaft 31 which can move downwards when the code is correct, the dustproof code padlock also comprises a dustproof cover 6 which is positioned between the lock block 5 and the lock body 1 and can move left and right in the lock body 1, the code assembly 3 also comprises a mounting frame 37, the peripheral surface of the code wheel 33 is provided with a plurality of positioning recesses 330, the mounting frame 37 is provided with a separation plate for separating the code wheel 33 and an elastic positioning arm 371 matched with the positioning recesses 330, the separation plate is provided with a pair of first elastic fixing arms 373 surrounding the peripheral surface of the code adjusting wheel 32, a first inserting hole 3730 allowing the code adjusting wheel 32 to be inserted is arranged between the pair of first elastic fixing arms 373, the peripheral surface of the upper end of the code adjusting sleeve 34 is provided with a limiting ring 341, the mounting frame 37 is provided with a pair of second elastic fixing arms 375 extending towards the peripheral surface of the code adjusting sleeve 34, a second inserting hole 3750 allowing the code adjusting sleeve 34 to be inserted is arranged between the pair of second elastic fixing arms 375, the wheel shaft reset spring 3t extrudes the code adjusting wheel 32 to extrude the code adjusting sleeve 34, with the stop collar 341 abutting the resilient locating arm 371, the mounting bracket 37 further includes a third stop portion 377 extending above the upper end 301 of the axle 31. The upper end 301 of the axle 31 is of plate-like configuration,

the plug assembly 4 is provided with a rotation column 41 extending toward the left side of the lock block 5, and the rotation column 41 has a convex portion 411 for blocking the leftward movement of the lock block 5 and a concave portion 410 for allowing the leftward movement of the lock block 5. The lock core assembly 4 further comprises a lock core 43 connected with the lower end of the rotating column 41, the lock core 43 is provided with a torsion protrusion 431 for driving the rotating column to rotate, and the rotating column 41 is provided with a torsion recess 41b sleeved outside the torsion protrusion 431.

The rotating column 41 is provided with a rotation limiting portion 413 for limiting the rotation range of the rotating column 41, and the rotation limiting portion 413 is a protrusion located on the top surface of the rotating column 41. The outer peripheral surface of the middle part of the rotating column 41 is provided with an annular notch 41c, and the lock body 1 is provided with an axial matching protrusion 18 which is accommodated in the annular notch 41c and used for preventing the rotating column 41 from axially moving.

The locking piece 5 is connected with the upper end 301 of the wheel shaft 31 in a sliding mode, the locking piece 5 can move left and right relative to the wheel shaft 31, the left end of the locking piece 5 is V-shaped, the surface of the left section 51 of the locking piece 5 is gradually reduced, the concave portion 410 is a V-shaped notch, and the locking piece 5 is provided with a sliding guide arm 51 extending towards the lower surface of the upper end 301 of the wheel shaft 31.

The dust cover 6 is provided with a driving inclined surface 6a for driving the locking block 5 to move leftwards, the locking block 5 is provided with a matching inclined surface 5a matched with the driving inclined surface 6a, the driving inclined surface 6a is used for pressing the matching inclined surface 5a to enable the locking block 5 and the wheel shaft 31 to move downwards, the dust cover 6 is provided with a covering part 61 which is positioned on the left side of the movable end 22 in a locking state and is used for covering the insertion hole 101 and a containing part 63 for containing the movable end 22, when the password assembly 3 is locked, the wheel shaft 31 limits the downward movement of the locking block 5, when the password assembly 3 or the lock core assembly 4 is unlocked, the movable end 22 can press the covering part 61 to move leftwards to realize unlocking, and when the lock core assembly 4 is unlocked, the movable end can press the covering part 61 to move leftwards to insert the concave part 410 to realize unlocking. The projection 411 restricts the covering portion 61 from moving leftward when the plug assembly 4 is locked.

The utility model discloses a theory of operation does:

after the lock core 43 is inserted into the key, the rotating column 41 can be twisted to enable the concave part 410 to face the lock block 5, a user drives the movable end to extrude the dust cover and drive the lock block to move leftwards for unlocking, when the lock is required to be locked, the movable end is inserted into the insertion hole 101, the movable end is extruded and inserted into the guide surface to enable the lock block to move leftwards, the movable end 22 falls into the insertion hole 101, the user twists the key to enable the convex part of the rotating column 41 to face the lock block 5, and when the lock block 5 is extruded by the side wall of the concave part 410, the lock block 5 drives the dust cover 6 and the movable end 22 to move rightwards for locking, and finally the key is pulled out.

When a user dials all the password wheels to rotate, when the passwords are correct, the user drives the movable end to move left, the left end of the locking block 5 is blocked by the protruding part, the driving inclined plane extrudes and cooperates with the inclined plane to enable the locking block and the wheel shaft to move downwards until the user extracts the movable end from the insertion hole, then the wheel shaft moves upwards under the extrusion of the wheel shaft reset spring, the inclined plane is matched with the driving inclined plane to extrude the driving inclined plane to enable the dustproof cover to move rightwards and reset, when the locking is needed, the movable end is inserted into the insertion hole 101, the movable end extrudes and inserts the guide surface to enable the locking block to move leftwards, the left end of the block 5 is blocked by the protruding part, the driving inclined plane extrudes and cooperates with the inclined plane to enable the locking block and the wheel shaft to move downwards until the movable end completely falls into the insertion hole, then the wheel shaft moves upwards under the extrusion of the wheel shaft reset spring, and the driving inclined plane is matched with the inclined plane to extrude the dustproof cover to move rightwards and reset to cover the insertion hole.

The utility model discloses in, through setting up shield 6, cover patchhole 101 under the locking state, can reduce the dust and get into in the lock body 1.

The first lock shell 11 of the lock body 1 is provided with a cover body 13 covering the top of the second lock shell 12, so that the upper surface and the lower surface of the cover body 13 are smooth planes, and the movable end 22 moves left and right smoothly.

The password wheel 33 mechanism is assembled in advance by using the mounting frame 37, the wheel shaft 31, the wheel shaft return spring 3t, the code adjusting wheel 32, the password wheel 33 and the code adjusting sleeve 34 are fixed by using the first elastic fixing arm 373, the second elastic fixing arm 375 and the third limiting part 377, the indicating part 32b for indicating the position of the alignment notch 320 is arranged on the outer peripheral surface of the code adjusting wheel 32, and the positions of the password wheel 33 and the code adjusting wheel 32 are adjusted by the code adjusting sleeve 34, so that the initial password error is prevented.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dustproof password padlock comprises a lock body, a lock rope, a password assembly, a lock cylinder assembly and a lock block, wherein the lock body is provided with a movable lock hole, the movable lock hole is formed by a plug-in hole and a lock hole which are communicated and adjacent, the lock rope is provided with a fixed end which is fixedly connected with the lock body and a movable end which can be inserted into the plug-in hole and matched and locked with the lock hole, the password assembly comprises a wheel shaft which can move downwards when a password is correct, the dustproof password padlock is characterized by also comprising a dustproof cover which is positioned between the lock block and the lock body and can move left and right in the lock body, the lock block is connected with the upper end of the wheel shaft in a sliding manner, the lock block can move left and right relative to the wheel shaft, the lock cylinder assembly is provided with a rotating column which extends towards the left side of the lock block, the rotating column is provided with a convex part which is used for blocking the left movement of the lock block and a concave part which allows the left movement of the lock block, the dustproof cover is provided with a driving inclined plane used for driving the locking block to move leftwards, the locking block is provided with a matching inclined plane matched with the driving inclined plane, the driving inclined plane is used for extruding the matching inclined plane to enable the locking block and the wheel shaft to move downwards, the dustproof cover is provided with a covering part which is positioned on the left side of the movable end in a locking state and used for covering the insertion hole and a containing part used for containing the movable end, when the password assembly is locked, the wheel shaft limits the locking block to move downwards, and when the password assembly or the password assembly is unlocked, the movable end can extrude the covering part to move leftwards to realize unlocking.

2. The dustproof combination padlock according to claim 1, wherein the combination assembly further comprises a wheel shaft return spring, a plurality of code adjusting wheels, a plurality of combination wheels and a combination adjusting sleeve, the wheel shaft return spring is arranged between the upper end of the wheel shaft and the code adjusting wheels, the wheel shaft is provided with a plurality of limiting lugs matched with the code adjusting wheels, the inner circumferential surface of each combination wheel is provided with an alignment notch matched with the limiting lug, the outer circumferential surface of each combination wheel is provided with a clutch protrusion matched with the combination wheel, the inner circumferential surface of each combination wheel is provided with a plurality of clutch notches matched with the clutch protrusions, the lower surface of the lock body is provided with a combination adjusting hole matched with the combination adjusting sleeve, the combination adjusting sleeve is sleeved at the lower end of the wheel shaft and is used when all the alignment notches correspond to the positions of the limiting lugs, and extruding the code adjusting wheel to move upwards to enable the clutch protrusion to be separated from the clutch notch.

3. The dust-proof combination padlock of claim 2, wherein the lock body comprises a first lock housing and a second lock housing, the first lock housing has a cover body covering the top of the second lock housing, the cover body is opened with a through hole for inserting the fixed end, the movable lock hole is opened with a top surface of the cover body, and the second lock housing is provided with a fixing notch for preventing the fixed end from being separated from the lock body.

4. A dust-proof combination padlock as claimed in claim 3, wherein the movable end is of a ball-shaped configuration, and the top of the covering portion has an insertion guide surface inclined downward to the right, and the insertion guide surface is pressed by the movable end to move to the right to expose the insertion hole.

5. The dust-proof combination padlock of claim 4, wherein the left end of the locking piece has a V-shape with a gradually decreasing cross-section toward the left, the recessed portion is a V-shaped notch, the lock body is provided with a first limiting portion engaged with the locking piece and the end surface of the right end of the dust-proof cover, and the lock body is provided with a second limiting portion engaged with the end surface of the left end of the dust-proof cover.

6. The dust-proof combination padlock of claim 5, wherein the lock cylinder assembly further comprises a lock cylinder connected to the lower end of the rotation column, the lock cylinder is provided with a torsion protrusion for driving the rotation, and the rotation column is provided with a torsion recess sleeved outside the torsion protrusion.

7. The dustproof combination padlock of claim 6, wherein the combination assembly further comprises a mounting bracket, the outer peripheral surface of the combination wheel is provided with a plurality of positioning recesses, the mounting bracket is provided with a separation plate for separating the combination wheel and elastic positioning arms matched with the positioning recesses, the separation plate is provided with a pair of first elastic fixing arms surrounding the outer peripheral surface of the combination wheel, a first socket allowing the combination wheel to be inserted is arranged between the pair of first elastic fixing arms, the outer peripheral surface of the upper end of the combination adjusting sleeve is provided with a limit ring, the mounting bracket is provided with a pair of second elastic fixing arms extending towards the outer peripheral surface of the combination adjusting sleeve, a second socket allowing the combination adjusting sleeve to be inserted is arranged between the pair of second elastic fixing arms, the wheel shaft reset spring extrudes the combination adjusting sleeve by extruding the combination wheel, so that the limit ring is abutted against the elastic positioning arms, the mounting bracket further comprises a third limiting part extending towards the upper part of the upper end of the wheel shaft.

8. The dust-proof combination padlock of claim 7, wherein the rotation column is provided with a rotation limiting portion for limiting the rotation range of the rotation column, the lock body is provided with a limit engaging portion engaged with the rotation limiting portion, and the rotation limiting portion is a protrusion on the top surface of the rotation column.

9. The dust resistant combination padlock of claim 8, wherein the rotating post has an annular notch formed in an outer peripheral surface of a middle portion thereof, and the lock body has an axial engagement protrusion received in the annular notch for preventing axial movement of the rotating post.

10. The dust-resistant combination padlock of claim 9, wherein the insertion hole is a circular hole, the locking hole is a strip-shaped hole, the upper end of the wheel shaft is of a plate-shaped structure, and the locking piece is provided with a sliding guide arm extending towards the lower surface of the upper end of the wheel shaft.