Detachable trunk trundle with stable structure

Abstract

The utility model discloses a detachable trunk trundle with a stable structure. The detachable trunk trundle comprises a base, a trundle assembly and a lock catch assembly, the base comprises a base body, a containing cavity, a lock catch limiting assembly, a button through hole, an inserting installation unit, a pressing plate and a positioning groove unit. The plug-in mounting unit comprises a plug-in through hole, a plug-in piece and a plug-in groove. The pressing plate comprises a pressing plate body, a pressing plate positioning piece and a mounting through hole. The positioning groove unit comprises a spring positioning groove and a pressing plate positioning groove. The lock catch assembly comprises a sliding buckle piece and a spring. The sum of the thickness of the pressing plate and the thickness of the sliding buckle piece is equal to the depth of the containing cavity. When the pressing plate is installed in the containing cavity, the pressing plate positioning piece in the pressing plate is inserted into the pressing plate positioning groove, and therefore one side of the spring positioning groove is sealed through the pressing plate. The detachable trunk trundle with the stable structure is reasonable in structure, the stability and durability of the trunk trundle are improved, and the service life of the trunk trundle is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of luggage casters, in particular to a detachable luggage caster with stable structure. Background Technique

[0002] A luggage case, also known as a travel case or a rolling suitcase, is a box used to hold items when going out. It is one type of luggage. Usually, a luggage case is used to place clothes, personal care products and souvenirs needed during a journey. To facilitate people to move around conveniently, casters are provided at the bottom of the luggage to facilitate the sliding of the luggage case. In the current market, the design of luggage casters tends to be convenient for disassembly and repair to meet the needs of different users and solve the problem of difficult replacement after the caster is damaged. However, in the existing detachable caster designs, although some products achieve the convenience of disassembly, there may be problems of insufficient stability in actual use.

[0003] For example, a disassemblable luggage caster in a Chinese patent with the application number CN202020681767.6 includes a connecting seat, a rotating shaft, a supporting frame and a wheel. The lower part of the supporting frame is connected to the wheel, the upper part of the supporting frame is connected to the connecting seat through the rotating shaft. The connecting seat has a transverse cavity, a guiding groove member is arranged in the transverse cavity, a movable locking member is installed on the guiding groove member, and a spring is arranged between the locking member and the guiding groove member. However, only one end of the spring is arranged in the guiding groove member, and the positions of the two ends of the spring are restricted by the locking member and the guiding groove member, which may cause the spring to be displaced or even fall off during the use of the caster, thereby affecting the normal movement and service life of the luggage case. Content of the Utility Model

[0004] In view of this, the utility model provides a detachable luggage caster with stable structure that can improve stability to meet industrial requirements.

[0005] A detachable suitcase caster with stable structure includes a base for connecting the luggage case, a caster assembly disposed on the base, and a locking component disposed between the base and the caster assembly. The base includes a base body, a receiving cavity disposed on the base body, a locking limit component disposed in the receiving cavity, a button through hole disposed on the side wall of the base body and communicating with the receiving cavity, two symmetrically disposed plug-in mounting units in the receiving cavity, a pressing plate disposed on the locking limit component, and a positioning groove unit disposed on the base body and received in the receiving cavity. The plug-in mounting unit includes a plug-in through hole disposed on the receiving cavity, at least two plug-in members disposed on the side wall of the base body and corresponding to the plug-in through hole, and at least one plug-in groove disposed on the side wall of the base body and corresponding to the plug-in through hole. The pressing plate includes a pressing plate body, a pressing plate positioning member disposed at one end of the pressing plate body, and a mounting through hole disposed on the pressing plate body. The positioning groove unit includes a spring positioning groove disposed on the base body and received in the receiving cavity, and a pressing plate positioning groove disposed at the end of the spring positioning groove facing away from the caster assembly. The locking component includes a sliding locking member inserted into the base body, and a spring disposed at one end of the sliding locking member. The sum of the thicknesses of the pressing plate and the sliding locking member is equal to the depth of the receiving cavity. One end of the spring in the locking component is received in the pressing plate positioning groove. When the pressing plate is installed in the receiving cavity, the pressing plate positioning member in the pressing plate is inserted into the pressing plate positioning groove, so that the pressing plate closes one side of the spring positioning groove, restricting the position of the spring received in the spring positioning groove.

[0006] Further, the locking limit component includes a threaded tube fixedly connected in the receiving cavity, and a screw screwed on the threaded tube.

[0007] Further, the pressing plate body includes a first pressing plate, and a second pressing plate disposed at one end of the first pressing plate. The length of the first pressing plate is greater than the length of the second pressing plate, and the outer contour of the pressing plate body is in a "convex" shape.

[0008] Further, the length of the pressing plate positioning groove is greater than the length of the spring positioning groove. When the pressing plate positioning member in the pressing plate is inserted into the pressing plate positioning groove, the pressing plate positioning member abuts against the connection position of the pressing plate positioning groove and the spring positioning groove, and the pressing plate closes one side of the spring positioning groove, improving the stability of the following spring in the spring positioning groove.

[0009] Further, the caster assembly includes a caster connecting seat inserted on the base, a caster bracket disposed on the caster connecting seat, and at least one pulley disposed on the caster bracket.

[0010] Further, the caster connecting seat includes a connecting seat body, two clamping members symmetrically disposed on the connecting seat body and inserted into the insertion through hole, two clamping units respectively disposed on the inner side walls of the clamping members, and two guiding units respectively disposed on the outer side walls of the clamping members.

[0011] Further, each of the clamping units includes a first clamping wall, a second clamping wall sequentially disposed on the inner side wall of the clamping member, a first positioning groove disposed on the first clamping wall, and a second positioning groove disposed on the second clamping wall.

[0012] Further, each of the guiding units includes at least two guiding grooves disposed on the outer side wall of the clamping member, and at least one guiding protrusion disposed on the outer side wall of the clamping member.

[0013] Further, the sliding clamping member includes a driving rod, two limiting clamping members symmetrically disposed on both sides of the driving rod, a spring accommodating groove disposed at one end of the driving rod, an installation through hole disposed on the driving rod, a spring positioning member disposed in the spring accommodating groove, and a driving button disposed at one end of the driving rod.

[0014] Further, each of the limiting clamping members includes a first limiting clamping member and a second limiting clamping member sequentially disposed on one side of the driving rod, and the connection position between the first limiting clamping member and the second limiting clamping member is stepped.

[0015] Compared with the prior art, the detachable luggage caster with stable structure provided by the present utility model uses the plug-in installation unit in the base to install the caster assembly, and restricts the position of the lock assembly through the pressing plate and the positioning groove unit in the base. Each plug-in through hole in the plug-in installation unit is arranged on the accommodating cavity, and at least two plug-in parts are arranged on the side wall of the base body and correspond to the plug-in through holes. The plug-in parts can guide the installation of the caster assembly, and each plug-in part is arranged at the position on the side wall of the base body corresponding to the plug-in through hole, improving the strength of the base body near the edge of the plug-in through hole. In addition, the spring positioning groove and the pressing plate positioning groove in the positioning groove unit are both arranged on the base body and accommodated in the accommodating cavity. The outer contour of the positioning groove unit is an inverted "convex" shape, the pressing plate positioning groove is arranged at the top of the spring positioning groove, one end of the spring in the lock assembly is accommodated in the accommodating cavity. When the pressing plate is installed in the accommodating cavity, one end of the pressing plate is inserted into the pressing plate positioning groove, so that the pressing plate closes one side of the spring positioning groove, restricting the position of the spring accommodated in the spring positioning groove. The sliding buckle part in the lock assembly restricts the position of the other end of the spring, improving the stability of the spring. And the sum of the thicknesses of the pressing plate and the sliding buckle part is equal to the depth of the accommodating cavity. During use, the pressing plate is flush with the end of the base body close to the luggage. The pressing plate bears the pressure of the luggage, improving the load-bearing capacity of the base body. It can be seen from this that the structure of the detachable luggage caster with stable structure is reasonable, improving the stability and durability of the luggage caster and extending the service life of the luggage caster. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of the detachable luggage caster with stable structure provided by the present utility model.

[0017] Figure 2 is Figure 1 Schematic cross-sectional structural diagram of the detachable luggage caster with stable structure.

[0018] Figure 3 is Figure 1 Exploded structural diagram of the detachable luggage caster with stable structure.

[0019] Figure 4 is Figure 3 Schematic structural diagram of the base in the detachable luggage caster with stable structure.

[0020] Figure 5 is Figure 3 Schematic structural diagram of the pressing plate in the detachable luggage caster with stable structure.

[0021] Figure 6 For Figure 3 Structural schematic diagram of the caster connecting seat in the structurally stable detachable luggage caster.

[0022] Figure 7 For Figure 3 Structural schematic diagram of the sliding buckle in the structurally stable detachable luggage caster. Specific embodiments

[0023] The following further details the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein does not limit the protection scope of the present invention.

[0024] As Figures 1 to 7 shown, it is a structural schematic diagram of the structurally stable detachable luggage caster provided by the present invention. The structurally stable detachable luggage caster includes a base 10 for connecting a luggage case (not shown in the figure), a caster assembly 20 disposed on the base 10, and a locking assembly 30 disposed between the base 10 and the caster assembly 20. The structurally stable detachable luggage caster further includes some other functional modules, such as an assembly component, etc., which should be well-known technologies to those skilled in the art and will not be elaborated in detail herein.

[0025] The base 10 includes a base body 11, a receiving cavity 12 disposed on the base body 11, a locking limit assembly 13 disposed in the receiving cavity 12, a button through hole 14 disposed on the side wall of the base body 11 and communicating with the receiving cavity 12, two symmetrically disposed plug-in mounting units 15 in the receiving cavity 12, a pressing plate 16 disposed on the locking limit assembly 13, and a positioning groove unit 17 disposed on the base body 11 and received in the receiving cavity 12.

[0026] The base body 11 is used to connect the luggage case, and the base body 11 can be connected to the luggage case by screws. The base body 11 is a prior art and will not be elaborated herein.

[0027] The receiving cavity 12 is used to receive the caster assembly 20 and the locking assembly 30, so that the base 10 and the locking assembly 30 are connected as a whole. The receiving cavity 12 will be described in detail in combination with the locking assembly 30 and will not be elaborated herein.

[0028] The latch limiting component 13 includes a threaded tube 131 fixedly connected inside the accommodation cavity 12 and a screw 132 screwed onto the threaded tube 131. The threaded tube 131 is used to fix the screw 132, and the screw 132 is used to fix the pressing plate 16. The pressing plate 16 limits the position of the latch component 30. Moreover, the threaded tube 131 can also be used to guide the sliding of the latch component 30 inside the accommodation cavity 12, so that the latch component 30 locks or unlocks the caster assembly 20 and the base 10. The threaded tube 131 and the screw 132 are of the prior art and will not be elaborated here.

[0029] The button through hole 14 is provided on the side wall of the base body 11, and the button through hole 14 communicates with the inside of the accommodation cavity 12, so that one end of the following sliding latch member 31 protrudes outside the base 10, and thus the following sliding latch member 31 can be driven outside the base 10.

[0030] The plug-in installation unit 15 includes a plug-in through hole 151 provided on the accommodation cavity 12, at least two plug-in members 152 provided on the side wall of the base body 11 and corresponding to the plug-in through hole 151, and at least one plug-in groove 153 provided on the side wall of the base body 11 and corresponding to the plug-in through hole 151. The plug-in through hole 151 is used for plugging and installing the caster assembly 20. The plug-in members 152 and the plug-in through hole 151 are used to position the caster assembly 20, facilitating the assembly between the base 10 and the caster assembly 20. The plug-in through hole 151, the plug-in members 152, and the plug-in groove 153 will all be described in detail in combination with the caster assembly 20.

[0031] The pressing plate 16 includes a pressing plate body 161, a pressing plate positioning member 132 provided at one end of the pressing plate body 161, and a mounting through hole 163 provided on the pressing plate body 161. The mounting through hole 163 is used to pass through the screw 132, so as to fix the pressing plate 16 to the threaded tube 131. The pressing plate 16 abuts against one side of the latch component 30, restricting the position of the latch component 30 inside the accommodation cavity 12.

[0032] The pressing plate body 161 includes a first pressing plate 1611 and a second pressing plate 1612 disposed at one end of the first pressing plate 1611. The length of the first pressing plate 1611 is greater than that of the second pressing plate 1612. The outer contour of the pressing plate body 161 is in a "convex" shape, and the outer contour of the pressing plate body 161 is the same as the gap contour between the following two clamping members 212, so as to facilitate restricting the locking component 30 between the following two clamping members 212. Therefore, the pressing plate body 161 will be described in detail in combination with the locking component 30.

[0033] The positioning groove unit 17 includes a spring positioning groove 171 disposed on the base body 11 and received in the receiving cavity 12, and a pressing plate positioning groove 172 disposed at one end of the spring positioning groove 171 facing away from the caster assembly 20. The outer contour of the positioning groove unit 17 is in a "convex" shape, wherein the length of the pressing plate positioning groove 172 is greater than that of the spring positioning groove 171. The pressing plate positioning groove 172 is disposed at the top of the spring positioning groove 171. One end of the pressing plate 16 is inserted into the pressing plate positioning groove 172, that is, the positions of the spring positioning groove 171 and the pressing plate positioning groove 172 are stepped. The length of the pressing plate positioning member 132 is equal to the length of the pressing plate positioning groove 172. When the pressing plate positioning member 132 in the pressing plate 16 is inserted into the pressing plate positioning groove 172, the pressing plate positioning member 132 abuts against the connection position of the pressing plate positioning groove 172 and the spring positioning groove 171. The pressing plate 16 closes one side of the spring positioning groove 171, improving the stability of the following spring 32 in the spring positioning groove 171.

[0034] The caster assembly 20 includes a caster connecting seat 21 inserted into the base 10, a caster frame 22 disposed on the caster connecting seat 21, and at least one pulley 23 disposed on the caster frame 22.

[0035] The caster connecting seat 21 includes a connecting seat body 211, two clamping members 212 symmetrically disposed on the connecting seat body 211 and inserted into the plugging through holes 151, two clamping units 213 respectively disposed on the inner side walls of the clamping members 212, and two guiding units 214 respectively disposed on the outer side walls of the clamping members 212.

[0036] The connecting seat body 211 is used to connect the caster frame 22, connecting the caster frame 22 and the caster connecting seat 21 together. The connecting seat body 211 is a prior art and will not be elaborated here.

[0037] The two clamping members 212 are symmetrically arranged on the connecting seat body 211. The outer contour shape of the clamping member 212 is the same as the outer contour shape of the insertion through hole 151, so that the clamping member 212 can be inserted into the insertion through hole 151.

[0038] Each of the clamping units 213 includes a first clamping wall 2131, a second clamping wall 2132, a first positioning groove 2133 arranged on the first clamping wall 2131, and a second positioning groove 2134 arranged on the second clamping wall 2132, which are sequentially arranged on the inner side wall of the clamping member 242. The clamping groove 243 is used to limit the position of the following sliding buckle 31 to realize the connection between the caster assembly 20 and the base 10. The outer contour of the pressing plate 16 is the same as the gap contour between the two clamping members 212. Each clamping member 242 is provided with the clamping unit 213 on the side facing the other clamping member 242. Moreover, the connection position between the first clamping wall 2131 and the second clamping wall 2132 in the clamping unit 213 is stepped. It can be imagined that the gap contour between the two clamping members 212 is in a "convex" shape, and the outer contour of the pressing plate 16 is also in a "convex" shape, so as to limit the position of the pressing plate 16 between the two clamping members 212, and the pressing plate 16 fills the gap between the two clamping members 212 to limit the position of the following sliding buckle 31.

[0039] Each guiding unit 214 includes at least two guiding grooves 2141 arranged on the outer side wall of the clamping member 242 and at least one guiding protrusion 2142 arranged on the outer side wall of the clamping member 242. When the caster assembly 20 is installed on the base 10, each guiding unit 214 corresponds to one of the insertion and installation units 15. Each insertion member 152 corresponds to one of the guiding grooves 2141, and the insertion slot 153 corresponds to the guiding protrusion 2142 to realize the insertion of the clamping member 212 into the insertion and installation unit 15.

[0040] One end of the caster frame 22 is connected to the caster connecting seat 21, and the other end of the caster frame 22 is connected to the pulley 23. In this embodiment, an insertion rod (not shown in the figure) is arranged between the caster frame 22 and the caster connecting seat 21. The caster frame 22 and the caster connecting seat 21 are connected into a whole through the insertion rod, and the rotation between the caster frame 22 and the caster connecting seat 21 is realized. The connection structure between the insertion rod and the caster frame 22 and the caster connecting seat 21 is a prior art and will not be described in detail here.

[0041] The pulley 23 is rotatably connected to one end of the caster frame 22. The pulley 23 is used to drive the caster frame 21 to slide. In this embodiment, a pin shaft 1 is provided between the pulley 23 and the caster frame 22 to rotatably connect the pulley 23 to one end of the caster frame 22. The pulley 22 and the connection structure between the pulley 23 and the caster frame 22 are both prior arts and will not be elaborated herein.

[0042] The lock assembly 30 includes a sliding buckle member 31 inserted into the base body 11 and a spring 32 provided at one end of the sliding buckle member 31.

[0043] The sliding buckle member 31 includes a driving rod 311, two limiting and clamping members 312 symmetrically arranged on both sides of the driving rod 311, a spring receiving groove 313 provided at one end of the driving rod 311, a mounting through hole 314 provided on the driving rod 311, a spring positioning member 315 provided in the spring receiving groove 313, and a driving button 316 provided at one end of the driving rod 311.

[0044] Each of the limiting and clamping members 312 includes a first limiting and clamping member 3121 and a second limiting and clamping member 3122 arranged in sequence on one side of the driving rod 311. The first limiting and clamping member 3121, the second limiting and clamping member 3122 cooperate with the first positioning groove 2133 in the first clamping wall 2431 and the second positioning groove 2134 in the second clamping wall 2432. When the base 10 is connected to the caster assembly 20, the first limiting and clamping member 3121 and the second limiting and clamping member 3122 respectively correspond to the first positioning groove 2133 in the first clamping wall 2431 and the second positioning groove 2134 in the second clamping wall 2432. The connection positions between the first limiting and clamping member 3121 and the second limiting and clamping member 3122 and the connection positions between the first clamping wall 2431 and the second clamping wall 2432 are both stepped, so that the first limiting and clamping member 3121, the second limiting and clamping member 3122 and the first clamping wall 2431, the second clamping wall 2432 are stably matched.

[0045] The spring receiving groove 313 receives the spring 32 to make the position of the spring 32 stable at one end of the sliding buckle member 31, so that the sliding buckle member 31 is stable during sliding. In this embodiment, the outer contour of the spring receiving groove 313 is an inverted U shape, and the spring limiting baffle 15 can be received in the spring receiving groove 313. When driving the sliding buckle member 31 to slide, the sliding buckle member 31 can slide along the spring receiving groove 313.

[0046] The installation through hole 314 is used for inserting the threaded tube 131. The outer diameter of the threaded tube 131 is smaller than the length of the installation through hole 314. It can be imagined that the threaded tube 131 can guide the sliding buckle 31 to slide and limit the position of the sliding buckle 31 on the base 10.

[0047] The spring positioning member 315 is used for inserting one end of the spring 32 to limit the position of the spring 32 on the sliding buckle 31.

[0048] When the sliding buckle 31 is installed on the base 10, the driving button 316 is inserted into the button through hole 14, so that the user can drive the sliding buckle 31 to slide through the driving button 316 to control the connection or separation between the base 10 and the caster assembly 20.

[0049] One end of the spring 32 is accommodated in the spring positioning groove 171, and the other end of the spring 32 is sleeved on the spring positioning member 315, thereby limiting the position of the spring 32. When the pressing plate 16 is installed in the accommodating cavity 12, one end of the pressing plate 16 is inserted into the pressing plate positioning groove 172, so that the pressing plate 16 closes one side of the spring positioning groove 171 and limits the position of the spring 32 accommodated in the spring positioning groove 171. And the spring 32 drives the sliding buckle 31 to slide by its own elasticity. The spring 32 is a prior art and will not be elaborated here.

[0050] When the base 10 and the caster assembly 20 are connected together, the spring 32 in the locking assembly 30 uses its own elastic force to push against the sliding buckle 31 to slide. The first limiting clamping member 3121 and the second limiting clamping member 3122 in the sliding buckle 31 are inserted into the first positioning groove 2133 of the first clamping wall 2131 and the second positioning groove 2134 in the second clamping wall 2132, so that the position between the base 10 and the caster assembly 20 is fixed.

[0051] When the base 10 and the caster assembly 20 are separated, the driving button 316 that abuts against the driving rod 311 and is accommodated in the button through hole 14 is pressed, so that the sliding buckle 31 slides along the installation through hole 315, so that the first limiting clamping member 3121 and the second limiting clamping member 3122 are separated from the first positioning groove 2133 of the first clamping wall 2131 and the second positioning groove 2134 in the second clamping wall 2132, and the sliding buckle 31 is separated from the caster connecting seat 24, realizing the disassembly between the base 10 and the caster assembly 20.

[0052] Compared with the prior art, the detachable luggage caster with stable structure provided by the utility model uses the plug-in installation unit 15 in the base 10 to install the caster assembly 20, and restricts the position of the latch assembly 30 through the pressing plate 16 and the positioning groove unit 17 in the base 10. Each plug-in through hole 151 in the plug-in installation unit 15 is arranged on the accommodation cavity 12, and at least two plug-in members 152 are arranged on the side wall of the base body 11 and correspond to the plug-in through hole 151. The plug-in members 152 can guide the installation of the caster assembly 20, and each plug-in member 152 is arranged at the position on the side wall of the base body 11 corresponding to the plug-in through hole 151, which improves the strength of the base body 11 near the edge of the plug-in through hole 151. In addition, the spring positioning groove 171 and the pressing plate positioning groove 172 in the positioning groove unit 17 are both arranged on the base body 11 and accommodated in the accommodation cavity 12. The outer contour of the positioning groove unit 17 is in an inverted "convex" shape. The pressing plate positioning groove 172 is arranged at the top of the spring positioning groove 171. One end of the spring 32 in the latch assembly 30 is accommodated in the accommodation cavity 12. When the pressing plate 16 is installed in the accommodation cavity 12, one end of the pressing plate 16 is inserted into the pressing plate positioning groove 172, so that the pressing plate 16 closes one side of the spring positioning groove 171, restricting the position of the spring 32 accommodated in the spring positioning groove 171. The sliding latch member 31 in the latch assembly 30 restricts the position of the other end of the spring 32, so as to improve the stability of the spring 32. And the sum of the thicknesses of the pressing plate 16 and the sliding latch member 31 is equal to the depth of the accommodation cavity 12. During the use process, the pressing plate 16 is flush with the end of the base body 11 close to the luggage. The pressing plate 16 bears the pressure of the luggage, improving the bearing capacity of the base body 11. It can be seen from this that the structure of the detachable luggage caster with stable structure is reasonable, improving the stability and durability of the luggage caster and extending the service life of the luggage caster.

[0053] The above is only the preferred embodiment of the present utility model and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement or improvement within the spirit of the present utility model is covered by the claims of the present utility model.

Claims

1. A detachable luggage case caster with a stable structure, characterized in that: The structurally stable detachable suitcase caster comprises a base for connecting a suitcase, a caster assembly arranged on the base, and a locking assembly arranged between the base and the caster assembly, the base comprises a base body, a receiving cavity arranged on the base body, a locking limit assembly arranged in the receiving cavity, a button through hole arranged on the side wall of the base body and connected to the receiving cavity, two plug-in installation units symmetrically arranged in the receiving cavity, a pressure plate arranged on the locking limit assembly, a positioning groove unit arranged on the base body and received in the receiving cavity, the plug-in installation unit comprises a plug-in through hole arranged on the receiving cavity, at least two plug-in connectors arranged on the side wall of the base body and corresponding to the plug-in through holes, and at least one plug-in connector arranged on the side wall of the base body and corresponding to the plug-in through hole The locking assembly comprises a sliding clip inserted on the base body and a spring arranged at one end of the sliding clip, the thickness of the pressing plate and the sliding clip being equal to the depth of the accommodating cavity, one end of the spring in the locking assembly being accommodated in the pressing plate positioning groove, and when the pressing plate is installed in the accommodating cavity, the pressing plate positioning groove in the pressing plate is inserted in the pressing plate positioning groove, so that the pressing plate closes one side of the spring positioning groove, thereby limiting the position of the spring accommodated in the spring positioning groove.

2. The structurally stable detachable luggage case caster according to claim 1, characterized in that: The locking and limiting assembly includes a threaded tube fixedly connected to the accommodating cavity and a screw threadedly connected to the threaded tube.

3. The structurally stable detachable luggage case caster according to claim 1, characterized in that: The pressing plate body includes a first pressing plate and a second pressing plate arranged at one end of the first pressing plate. The length of the first pressing plate is greater than the length of the second pressing plate. The outer contour of the pressing plate body is in a "convex" shape.

4. The structurally stable detachable luggage case caster according to claim 1, characterized in that: The length of the pressure plate positioning groove is greater than the length of the spring positioning groove. When the pressure plate positioning piece in the pressure plate is inserted into the pressure plate positioning groove, the pressure plate positioning piece abuts against the connection position between the pressure plate positioning groove and the spring positioning groove. The pressure plate closes one side of the spring positioning groove, thereby improving the stability of the following spring in the spring positioning groove.

5. The structurally stable detachable luggage case caster according to claim 1, characterized in that: The caster assembly comprises a caster connection seat inserted on the base, a caster frame arranged on the caster connection seat, and at least one pulley arranged on the caster frame.

6. The structurally stable detachable luggage case caster according to claim 5, characterized in that: The caster connecting seat includes a connecting seat body, two clamping parts symmetrically arranged on the connecting seat body and inserted into the plug-in through hole, two clamping units respectively arranged on the inner side walls of the clamping parts, and two guiding units respectively arranged on the outer side walls of the clamping parts.

7. The structurally stable detachable luggage case caster according to claim 6, characterized in that: Each of the clamping units includes a first clamping wall and a second clamping wall which are sequentially arranged on the inner side wall of the clamping member, a first positioning groove arranged on the first clamping wall, and a second positioning groove arranged on the second clamping wall.

8. The structurally stable detachable luggage case caster according to claim 6, characterized in that: Each of the guide units includes at least two guide grooves arranged on the outer side wall of the clamping member, and at least one guide protrusion arranged on the outer side wall of the clamping member.

9. The structurally stable detachable luggage case caster according to claim 1, characterized in that: The sliding latch comprises a driving rod, two limiting latches symmetrically arranged on both sides of the driving rod, a spring receiving groove arranged at one end of the driving rod, a mounting through hole arranged on the driving rod, a spring positioning member arranged in the spring receiving groove, and a driving button arranged at one end of the driving rod.

10. The structurally stable detachable luggage case caster according to claim 9, characterized in that: Each of the position-limiting clamping parts comprises a first position-limiting clamping part and a second position-limiting clamping part which are sequentially arranged on one side of the driving rod, and the connection position between the first position-limiting clamping part and the second position-limiting clamping part is in a step shape.

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