A barbell / dumbbell quick-locking device

Abstract

This utility model belongs to the field of locking connection technology, specifically relating to a barbell / dumbbell quick locking device, including an inner cylinder with an axial through hole and an outer sleeve sleeved outside the inner cylinder. The outer wall of the inner cylinder has a first conical surface, and the inner wall of the outer sleeve is provided with a second conical surface matching the first conical surface. An inclined surface is provided on the outer wall of the inner cylinder on the larger diameter side of the first conical surface. An unlocking button for driving the inclined surface to move axially is provided on the top transverse groove of the outer sleeve. Steel balls are fitted in the first through holes circumferentially spaced on the first conical surface of the inner cylinder. An annular cover plate is connected to the end face of the outer sleeve on the groove side. A spring for driving the inner cylinder to move away from the cover plate is provided between the cover plate and the inner cylinder. The advantages are: simple structure, convenient use, stable performance, reliable locking, and suitable for locking and positioning components on shafts or pipes.

Description

Technical Field

[0001] This utility model belongs to the field of locking connection technology, and in particular relates to a barbell / dumbbell quick locking device. Background Technology

[0002] Currently, there are many positioning and locking structures used on shafts and pipes, such as threaded connectors, pins, or steel ball push-pull locking devices. However, their drawbacks are that they are cumbersome to operate, laborious, and time-consuming, and are not suitable for the quick assembly and disassembly of barbells / dumbbells that require different weights. Summary of the Invention

[0003] The purpose of this invention is to provide a barbell / dumbbell quick-locking device that is easy to assemble and disassemble, takes little time, can be quickly locked and positioned, and can be quickly disassembled and assembled.

[0004] The purpose of this utility model is to solve the following problem:

[0005] A barbell / dumbbell quick-locking device includes an inner cylinder with an axial through hole and an outer cylinder sleeved outside the inner cylinder. The outer wall of the inner cylinder has a first conical surface, and the inner wall of the outer cylinder has a second conical surface that matches the first conical surface. An inclined surface is provided on the outer wall of the inner cylinder on the larger diameter side of the first conical surface. An unlocking button for driving the inclined surface to move axially is provided on the top transverse groove of the outer cylinder. Steel balls are fitted into the first through holes circumferentially spaced on the first conical surface of the inner cylinder. An annular cover plate is connected to the end face of the outer cylinder on the groove side. A spring for driving the inner cylinder to move away from the cover plate is provided between the cover plate and the inner cylinder. The two ends of the spring are respectively abutted on the cover plate and the inner cylinder on their respective spring seats. The cover plate allows the unlocking button to move radially to drive the inner cylinder to move axially to unlock.

[0006] As a further optimization of the above technical solution, the upper surface of the unlocking button is provided with one or more protrusions, and the lower surface of the cover plate is provided with a guide groove that restricts the protrusions to move only laterally.

[0007] As a further optimization of the above technical solution, the unlocking button is provided with an inclined driving surface that drives the inclined surface to move axially to unlock.

[0008] As a further optimization of the above technical solution, there are two unlocking buttons, both of which are U-shaped. The two unlocking buttons are symmetrically arranged in four horizontal grooves on the top of the outer sleeve. The inclined driving surface is arranged at the ends of the two side walls of the U-shaped body. There are also four inclined surfaces arranged on the outer side wall of the inner sleeve to cooperate with the inclined driving surface.

[0009] As a further optimization of the above technical solution, a conical groove matching the first conical surface is provided on the inner wall of the outer sleeve, a conical ring is installed in the conical groove, and the inner wall surface of the conical ring has the second conical surface.

[0010] As a further optimization of the above technical solution, the first through hole on the inner cylinder is necked near the inner surface of the inner cylinder so that the inner diameter at that point is smaller than the outer diameter of the steel ball, so that the steel ball can move radially out of the first through hole and will not leak into the axial through hole of the inner cylinder.

[0011] As a further optimization of the above technical solution, an axial groove is provided on the first conical surface between two adjacent first through holes on the inner cylinder.

[0012] As a further optimization of the above technical solution, a hollow hole penetrating the inner cylinder sidewall is provided on the first conical surface on the upper side of the first through hole.

[0013] As a further optimization of the above technical solution, the outer wall of the cylinder formed by the necking of the upper outer wall of the inner cylinder is provided with two or more guide grooves, and the inner wall of the cover plate is provided with a guide block that is inserted into the guide groove to cooperate with the axial movement of the inner cylinder.

[0014] As a further optimization of the above technical solution, an annular groove is provided on the upper surface of the cover plate, and bolt mounting holes are provided circumferentially at intervals in the annular groove. The cover plate is screwed into the threaded hole on the outer sleeve by bolts passing through the bolt mounting holes.

[0015] The advantages of this invention compared to the prior art are:

[0016] 1. This utility model utilizes the relative movement between the inner cylinder and the outer cylinder to drive the movement of the steel column, thereby achieving locking or unlocking.

[0017] 2. This utility model utilizes symmetrically arranged unlocking buttons, allowing for quick unlocking by pressing two unlocking handles simultaneously with the fingers of one hand, saving effort, time, and enabling rapid positioning.

[0018] 3. In this utility model, one or more springs are circumferentially arranged between the cover plate and the inner cylinder to drive the inner cylinder to move away from the cover plate, thereby forming a locking force. The magnitude and number of spring forces can be selected as needed.

[0019] 4. Compared with other quick-release products, this utility model can greatly shorten the axial length, further improving the product's appearance and structural aesthetics, and making the overall product more coordinated.

[0020] 5. This utility model ingeniously uses the wedge principle, pushing the quick-release mechanism from the front, the more it is pushed, the tighter the lock becomes, reliably solving various impacts during the use of the barbell and achieving reliable locking. When unlocking, it can also be done quickly, easily, and effortlessly.

[0021] 6. This utility model utilizes the contact between the metal outer ring and the steel ball to increase contact rigidity, greatly increasing the reliability of locking and product life, and solving the problem of insufficient point contact rigidity of plastic parts used in the outer sleeve.

[0022] 7. This utility model has a simple structure, is easy to use, has stable performance, and is reliable in locking. It is suitable for locking and positioning components on shafts or pipes. Attached Figure Description

[0023] Figure 1 This is one of the three-dimensional schematic diagrams of this utility model.

[0024] Figure 2 This is the front view of this utility model.

[0025] Figure 3 yes Figure 2 A sectional view along the AA direction.

[0026] Figure 4 This is a three-dimensional schematic diagram of the present invention after the cover plate has been removed.

[0027] Figure 5 This is an exploded view of this utility model.

[0028] Figure 6 This is the second three-dimensional schematic diagram of this utility model.

[0029] Figure 7 This is a cross-sectional view of the present invention mounted on the spindle.

[0030] Figure 8 This is a three-dimensional schematic diagram of the cover plate of this utility model.

[0031] Figure 9 This is a three-dimensional schematic diagram of the outer sleeve of this utility model. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-9 :

[0033] For ease of description, "upper" and "lower" in this text refer to the axial direction with the cover plate at the top. If the cover plate covers the upper end of the outer sleeve, then the outer sleeve is considered the lower part. Figure 3 Left and right are left and right, respectively. Figure 3 The upper and lower parts are referred to as "upper" and "lower," and the first and second parts do not refer to their importance, but are merely names of certain components.

[0034] A barbell / dumbbell quick-locking device includes an inner cylinder 20 with an axial through hole 23 and an outer cylinder 40 sleeved outside the inner cylinder 20. The outer wall of the inner cylinder 20 has a first conical surface 21, and the inner wall of the outer cylinder 40 is provided with a second conical surface 51 that matches the first conical surface 21. An inclined surface 24 is provided on the outer wall of the inner cylinder 20 on the larger diameter side of the first conical surface 21. An unlocking button 30 for driving the inclined surface 24 to move axially is provided on the top transverse groove 42 of the outer cylinder 40. The first conical surface 51 of the inner cylinder 20... Steel balls 60 are fitted into the first through holes 22 spaced apart around the circumference of the surface 21. An annular cover plate 10 is connected to the end face 44 of the outer sleeve 40 on the side of the top transverse groove 42. A spring 80 is provided between the cover plate 10 and the inner cylinder 20 to drive the inner cylinder 20 to move away from the cover plate 10. The two ends of the spring 80 are respectively abutted on the spring seats 15 and 29 on the cover plate 10 and the inner cylinder 20. The cover plate 10 allows the unlocking button 30 to move radially to drive the inner cylinder 20 to move axially to unlock.

[0035] As a further optimization of the above technical solution, the upper surface of the unlocking button 30 is provided with one or more protrusions 32, and the lower surface of the cover plate 10 is provided with a guide groove 14 that restricts the protrusions 32 to move only laterally.

[0036] As a further optimization of the above technical solution, the unlocking button 30 is provided with an inclined driving surface 31 that drives the inclined surface 24 to move axially to unlock.

[0037] As a further optimization of the above technical solution, there are two unlocking buttons 30, both of which are U-shaped. The two unlocking buttons 30 are symmetrically arranged in the four horizontal grooves 42 on the top of the outer sleeve 40. The inclined driving surface 31 is arranged at the ends of the two side walls of the U-shaped body. There are also four inclined surfaces 24 arranged on the outer side wall of the inner sleeve 20 to cooperate with the inclined driving surface 31.

[0038] As a further optimization of the above technical solution, the inner wall of the outer sleeve 40 is provided with a conical groove 41 that matches the first conical surface 21, and a conical ring 50 is installed in the conical groove 41. The inner wall surface of the conical ring 50 has the second conical surface 51.

[0039] As a further optimization of the above technical solution, the first through hole 22 on the inner cylinder 20 is necked near the inner surface of the inner cylinder 20 so that the inner diameter at that location is smaller than the outer diameter of the steel ball 60, so that the steel ball 60 can move radially out of the first through hole 22 and will not leak into the axial through hole 23 of the inner cylinder 20.

[0040] As a further optimization of the above technical solution, an axial slot 26 is provided on the first conical surface 21 between two adjacent first through holes 22 on the inner cylinder 20.

[0041] As a further optimization of the above technical solution, a hollow hole 25 is provided on the first tapered surface 21 on the upper side of the first through hole 22, which penetrates the side wall of the inner cylinder 20.

[0042] As a further optimization of the above technical solution, the outer wall of the cylinder 27 formed by the necking of the upper outer wall of the inner cylinder 20 is provided with two or more guide grooves 28, and the inner wall of the cover plate 10 is provided with a guide block 13 that is inserted into the guide groove 28 to cooperate with the axial movement of the inner cylinder 20.

[0043] As a further optimization of the above technical solution, an annular groove 11 is provided on the upper surface of the cover plate 10, and bolt mounting holes 12 are provided circumferentially spaced in the annular groove 11. The cover plate 10 is screwed into the threaded hole 43 on the outer sleeve 40 by bolts passing through the bolt mounting holes 12.

[0044] See Figure 7 Use of this utility model:

[0045] 1. Locking: Press the unlock button 30 to unlock the main shaft 70, place the cover plate 10 inward onto the main shaft 70 and push the outer sleeve 40 inward. When the front part of the inner sleeve 10 presses against the positioned part 71 on the main shaft 70, the outer sleeve 40 drives the conical ring 50 to move to the left. After releasing the unlock button 30, under the action of the spring force of the spring 80, the conical ring 50 squeezes the steel ball 60 and moves radially towards the axis. The relative movement between the outer sleeve 40 and the inner sleeve 10 pushes out the steel ball 60, thus fixing or locking the positioned part 71 on the main shaft 70.

[0046] 2. Unlocking: Press the unlock button 30. The unlock button 30 causes the inner cylinder 10 to move axially relative to the outer cylinder 20 by the elastic force of the spring 80. The steel ball 60 is radially squeezed outward by the main shaft 70 and moves radially outward in the first through hole 22. The steel ball 60 no longer exerts force on the main shaft 70, so the unlock button 30 can be pushed axially to the right to move the inner cylinder 10 to the right to unlock.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that simple substitutions or modifications can still be made to the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and substance of the technical solutions of the embodiments of this utility model, and are still within the protection scope of this utility model.

Claims

1. A barbell / dumbbell quick-locking device, characterized in that: The device includes an inner cylinder with an axial through hole and an outer sleeve fitted outside the inner cylinder. The outer wall of the inner cylinder has a first conical surface, and the inner wall of the outer sleeve has a second conical surface that matches the first conical surface. An inclined surface is provided on the outer wall of the inner cylinder on the larger diameter side of the first conical surface. An unlocking button for driving the inclined surface to move axially is provided on the top transverse groove of the outer sleeve. Steel balls are fitted into the first through holes circumferentially spaced on the first conical surface of the inner cylinder. An annular cover plate is connected to the end face of the outer sleeve on the top transverse groove side. A spring for driving the inner cylinder to move away from the cover plate is provided between the cover plate and the inner cylinder. The two ends of the spring are respectively abutted on the cover plate and the inner cylinder on their respective spring seats.

2. The barbell / dumbbell quick-locking device according to claim 1, characterized in that: The upper surface of the unlock button is provided with one or more protrusions, and the lower surface of the cover plate is provided with a guide groove that restricts the protrusions to move only laterally.

3. The barbell / dumbbell quick-locking device according to claim 2, characterized in that: The unlock button is provided with an inclined driving surface that drives the inclined surface to move axially to unlock.

4. The barbell / dumbbell quick-locking device according to claim 3, characterized in that: There are two unlocking buttons, both of which are U-shaped. The two unlocking buttons are symmetrically arranged in four horizontal grooves on the top of the outer sleeve. The inclined driving surface is arranged at the ends of the two side walls of the U-shaped body. There are also four inclined surfaces arranged on the outer side wall of the inner sleeve to cooperate with the inclined driving surface.

5. A barbell / dumbbell quick-locking device according to claim 1, characterized in that: The inner wall of the outer sleeve is provided with a conical groove that matches the first conical surface, and a conical ring is installed in the conical groove. The inner wall surface of the conical ring has the second conical surface.

6. The barbell / dumbbell quick-locking device according to claim 1, characterized in that: The first through hole on the inner cylinder is necked near the inner surface of the inner cylinder so that the inner diameter at that point is smaller than the outer diameter of the steel ball, so that the steel ball can move radially out of the first through hole and will not leak into the axial through hole of the inner cylinder.

7. The barbell / dumbbell quick-locking device according to claim 1, characterized in that: An axial groove is provided on the first conical surface between two adjacent first through holes on the inner cylinder.

8. A barbell / dumbbell quick-locking device according to claim 7, characterized in that: A perforated hole penetrating the inner cylinder sidewall is provided on the first conical surface on the upper side of the first through hole.

9. A barbell / dumbbell quick-locking device according to claim 1, characterized in that: The outer wall of the cylinder formed by the necking of the upper outer wall of the inner cylinder is provided with two or more guide grooves, and the inner wall of the cover plate is provided with a guide block that is inserted into the guide groove to cooperate with the axial movement of the inner cylinder.

10. A barbell / dumbbell quick-locking device according to claim 9, characterized in that: The upper surface of the cover plate is provided with an annular groove, and bolt mounting holes are provided circumferentially at intervals in the annular groove. The cover plate is screwed into the threaded hole on the outer sleeve by bolts passing through the bolt mounting holes.

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