Continuously variable transmission package pull rod assembly

Abstract

The utility model discloses a continuously variable transmission package pull rod assembly which comprises a small pipe, a limiting mechanism and a middle pipe, the limiting mechanism is arranged in the middle pipe to control the small pipe to move up and down, the limiting mechanism comprises a lock bar, a lock catch, a lock bar stop dog, lock teeth and a lock cylinder, the lock catch is sleeved on the upper portion of the lock cylinder, the lock teeth are assembled in a limiting cavity of the lock cylinder, and the lock bar stop dog is arranged in the middle pipe. A lock tooth spring is assembled between the lock tooth and the inner wall of the lock cylinder, a lock rack is arranged on the inner wall of the middle pipe, the lock tooth is matched with a rack of the lock rack, the upper end of the lock bar abuts against the lower end of the control push rod, and the lower portion of the lock bar is inserted into the lock cylinder and matched with the lock tooth in a sliding mode. According to the utility model, the telescopic length of the draw bar of the draw-bar box can be elastically adjusted according to different requirements, so that the flexibility of convenient use of the telescopic draw bar is improved, and the telescopic draw bar has smooth and quiet excellent operation texture.

Description

Technical Field

[0001] The utility model relates to the technical field of pull rods, in particular to a continuously variable transmission case pull rod assembly. Background Art

[0002] Trolley cases are a common personal equipment for modern people to travel and go abroad. The telescopic rod used to tow a general trolley case is composed of two or three sections of pivotally arranged rods. When the rod is telescopically extended, each section of the rod has its own pin-jointed positioning point. Therefore, whether the rod is stretched or retracted, it must reach the pin-jointed positioning point to position the rod. The application of the telescopic length of the rod is limited, and the elastic adjustment function of using different rod lengths to meet different state requirements is not possible. Since the stretching or retracting operation of the rod is when the positioning pin slides to the positioning hole, the positioning pin is pressed into the positioning hole by an elastic mechanism to position the rod. This will cause a loud noise in the telescopic operation of the rod, and the operation of the telescopic rod cannot have a smooth or quiet operation texture. Therefore, how to overcome the aforementioned deficiencies in the use of the telescopic rod of the trolley case is truly a key direction that the industry or wise people should further develop and break through.

[0003] Therefore, based on the shortcomings of the telescopic pull rod structure of the trolley case in the prior art and its unsatisfactory structural design, it is hoped that a continuously variable pull rod with greater convenience and better operational feel can be developed. Summary of the invention

[0004] The purpose of the utility model is to provide a continuously variable transmission case tie rod assembly, which can make the extension length of the tie rod of the trolley case be able to be positioned at different lengths according to different needs, thereby increasing the flexibility of the telescopic tie rod for convenient use. The telescopic tie rod operation also has an excellent operating texture of smoothness and quietness.

[0005] The technical solution adopted by the utility model is as follows: a continuously variable transmission package pull rod assembly, including a small tube, a limiting mechanism and a middle tube, the limiting mechanism is placed in the middle tube to control the up and down movement of the small tube, the limiting mechanism includes a lock bar, a lock buckle, a lock bar block, a lock tooth and a lock core, the lock buckle is sleeved on the upper part of the lock core, a lock tooth is installed in the limiting cavity of the lock core, a lock tooth spring is installed between the lock tooth and the inner wall of the lock core, a lock tooth bar is provided on the inner wall of the middle tube, the lock tooth cooperates with the rack of the lock tooth bar, the upper end of the lock bar abuts against the lower end of the control push rod, the lower part of the lock bar is inserted in the lock core and slidably cooperates with the lock tooth.

[0006] Furthermore, a limit block is provided inside the zinc alloy lock tooth, and inclined portions for avoiding the lock bar are provided on both sides of the limit block, and a stepped plane for placing a lock tooth spring is provided on the periphery of the lock tooth.

[0007] Furthermore, a lock bar spring is sleeved on the upper portion of the lock bar, and the lower end of the lock bar spring abuts against the upper portion of the lock core.

[0008] Furthermore, a trapezoidal portion is provided on one side of the lower portion of the lock bar close to the lock teeth, and the trapezoidal portion is slidably matched with the inclined portion.

[0009] Furthermore, the lock bar stopper is assembled at the opening of the limiting cavity of the lock core.

[0010] Furthermore, a control iron bar is inserted into the control push rod, the control iron bar is passed through the small tube, and the control iron bar is connected to the handle switch.

[0011] Furthermore, a small tube sleeve is sleeved on the opening of the upper end of the middle tube, and the small tube passes through the small tube sleeve.

[0012] Furthermore, a limiting plate is provided on the side wall of the middle tube, and the locking tooth bar is fixed between the inner wall of the middle tube and the limiting plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects: (1) The structure of the utility model can make the telescopic length of the trolley case's pull rod be able to be adjusted to different lengths according to different needs, thereby increasing the flexibility of the telescopic pull rod for convenient use; it can also make the operation of the telescopic pull rod of the trolley case smooth and quiet with excellent operating quality;

[0014] (2) The pull rod is locked: the highest plane of the trapezoidal part of the lower part of the lock bar presses against the highest point of the limit block of the lock tooth, so that it forms a straight line of force. At this time, the lock tooth and the rack of the lock tooth bar are in a locked state; the pull rod is unlocked: the handle switch on the pull rod is pressed down, and the lock bar is pushed down by controlling the iron bar and the control push rod assembly, so that the highest plane of the trapezoidal part of the lock bar leaves the highest point of the limit block of the lock tooth, and then the lock tooth spring presses the lock tooth to the bottom surface of the lock bar, so that the inclined surface of the trapezoidal part of the lock bar and the inclined surface of the lock tooth fit together, thereby achieving the separation of the lock tooth and the lock tooth bar, and finally achieving the unlocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an explosion diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the locking state of the pull rod of the utility model;

[0017] Figure 3 This is a schematic diagram of the unlocked state of the pull rod of the utility model;

[0018] Figure 4 This is a cross-sectional view of the small tube sleeve of the utility model;

[0019] In the figure, 1. small tube; 2. control iron bar; 3. control push rod; 4. lock bar; 41. trapezoidal part; 5. lock buckle; 6. lock bar spring; 7. lock bar block; 8. lock tooth; 81. position part; 9. lock tooth spring; 10. lock core; 11. small sleeve; 12. middle tube; 121. limit plate; 13. lock tooth bar. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] like Figure 1-Figure 4 As shown, a continuously variable transmission package tie rod assembly includes a small tube 1, a limiting mechanism and a middle tube 12. The limiting mechanism is placed in the middle tube 12 to control the up and down movement of the small tube 1. The limiting mechanism includes a lock bar 4, a lock buckle 5, a lock bar block 7, a lock tooth 8 and a lock core 10. The lock buckle 5 is sleeved on the upper part of the lock core 10 to buckle the lock core 10 and connect it to the middle tube 12. The locking tooth 8 is installed in the limiting cavity of the lock core 10. The reverse opening of the limiting cavity of the lock core 10 is convenient for assembling the lock tooth 8. The inner step design in the limiting cavity is convenient for assembling the lock tooth spring 9 between the lock tooth 8 and the inner wall of the lock core 10. The through hole design at the tail of the lock core 10 is convenient for avoiding the lock bar 4. The lock tooth spring 9 pushes the lock tooth 8 away from the lock tooth bar 13 by using the lock core 10 as the force surface, thereby achieving the release of the lock state of the pull rod. The inner wall of the middle tube 12 is provided with a lock tooth bar 13, and the lock tooth 8 cooperates with the rack of the lock tooth bar 13. The upper end of the lock bar 4 abuts against the lower end of the control push rod 3, and the lower part of the lock bar 4 is inserted into the lock core 10 and slidingly cooperates with the lock tooth 8.

[0022] Furthermore, a limit block 81 is provided inside the zinc alloy lock tooth 8, and inclined portions for avoiding the lock bar 4 are provided on both sides of the limit block 81. The angle of the inclined portion is preferably 45 degrees, and a stepped plane for placing the lock tooth spring 9 is provided on the periphery of the lock tooth 8.

[0023] Furthermore, a lock bar spring 6 is sleeved on the upper portion of the lock bar 4 , and the lower end of the lock bar spring 6 abuts against the upper portion of the lock core 10 .

[0024] Furthermore, a trapezoidal portion is provided on one side of the lower portion of the locking bar 4 close to the locking tooth 8, and the trapezoidal portion is slidably matched with the inclined portion.

[0025] Furthermore, the lock bar stopper 7 is assembled at the opening of the limiting cavity of the lock core 10. The lock bar stopper 7 is intended to better protect the zinc alloy lock teeth 8 and the lock tooth bar 13 from deforming when the suitcase is loaded, thereby better preventing the pull rod from pausing at an unintended size position and becoming ineffective when the suitcase is loaded.

[0026] Furthermore, a control iron bar 2 is inserted into the control push rod 3, the control iron bar is passed through the small tube 1, and the control iron bar 2 is connected to the handle switch.

[0027] Furthermore, a small tube sleeve 11 is sleeved on the opening at the upper end of the middle tube 12, and the small tube 1 passes through the small tube sleeve 11. The small tube sleeve 11 serves to connect the small tube 1 and the middle tube 12, so that when the pull rod is assembled, the small tube 1 will not fall out after passing through the middle tube 12, and can better protect the lock rack 13 from falling out of the middle tube 12.

[0028] Furthermore, a limiting plate is provided on the side wall of the middle tube 12, and the locking rack 13 is fixed between the inner wall of the middle tube 12 and the limiting plate. The structure of the locking rack 13 is a tooth shape in the middle and ribs on both sides, which can better enable the locking rack 13 to play a better force-bearing role, so that the pull rod will not be soft and easily damaged when loaded.

[0029] Working principle: in the locked state of the pull rod: the highest plane of the trapezoidal part 41 at the bottom of the lock bar 4 presses against the highest point of the limit block 81 of the lock tooth 8, so that it forms a straight line of force. At this time, the lock tooth 8 and the rack of the lock tooth bar 13 are in a locked state; in the unlocked state of the pull rod: the handle switch on the pull rod is pressed down, and the lock bar 4 is pushed down by controlling the iron bar 2 and the control push rod 3 assembly, so that the highest plane of the trapezoidal part 41 of the lock bar 4 leaves the highest point of the limit block 81 of the lock tooth 8, and then the lock tooth spring 9 presses the lock tooth 8 to the bottom surface of the lock bar 4, so that the inclined surface of the trapezoidal part 41 of the lock bar 4 is in contact with the inclined surface of the lock tooth 8, so that the lock tooth 8 is separated from the lock tooth bar 13, and finally the unlocking effect is achieved.

[0030] The structure of the utility model can make the telescopic length of the trolley case's pull rod be able to be elastically adjusted to different lengths according to different needs, thereby increasing the flexibility of the telescopic pull rod for convenient use; it can also make the operation of the telescopic pull rod of the trolley case smooth and quiet with excellent operating texture.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A continuously variable transmission pull rod assembly, characterized in that: The invention comprises a small tube (1), a limiting mechanism and a middle tube (12), wherein the limiting mechanism is arranged in the middle tube (12) to control the upward and downward movement of the small tube (1), the limiting mechanism comprises a lock bar (4), a lock buckle (5), a lock bar block (7), a lock tooth (8) and a lock core (10), the lock buckle (5) is sleeved on the upper part of the lock core (10), a lock tooth (8) is arranged in the limiting cavity of the lock core (10), a lock tooth spring (9) is arranged between the lock tooth (8) and the inner wall of the lock core (10), a lock tooth bar (13) is arranged on the inner wall of the middle tube (12), the lock tooth (8) cooperates with the tooth bar of the lock tooth bar (13), the upper end of the lock bar (4) abuts against the lower end of the control push rod (3), the lower part of the lock bar (4) is inserted into the lock core (10) and slidably cooperates with the lock tooth (8).

2. The continuously variable transmission tie rod assembly according to claim 1, characterized in that: A limit block (81) is provided inside the zinc alloy lock tooth (8), and inclined portions for avoiding the lock bar (4) are provided on both sides of the limit block (81). A stepped plane for placing a lock tooth spring (9) is provided on the periphery of the lock tooth (8).

3. The continuously variable transmission tie rod assembly according to claim 2, characterized in that: A lock bar spring (6) is sleeved on the upper portion of the lock bar (4), and the lower end of the lock bar spring (6) abuts against the upper portion of the lock core (10).

4. The continuously variable transmission tie rod assembly according to claim 3, characterized in that: A trapezoidal portion is provided on one side of the lower part of the lock bar (4) close to the lock tooth (8), and the trapezoidal portion is slidably matched with the inclined portion.

5. The continuously variable transmission tie rod assembly according to claim 1, characterized in that: The lock bar stopper (7) is assembled at the opening of the limiting cavity of the lock core (10).

6. The continuously variable transmission tie rod assembly according to claim 1, characterized in that: A control iron bar (2) is inserted into the control push rod (3), the control iron bar is passed through the small tube (1), and the control iron bar (2) is connected to the handle switch.

7. The continuously variable transmission tie rod assembly according to claim 1, characterized in that: A small tube sleeve (11) is sleeved on the upper opening of the middle tube (12), and the small tube (1) passes through the small tube sleeve (11).

8. The continuously variable transmission tie rod assembly according to claim 1, characterized in that: A limiting plate is provided on the side wall of the middle tube (12), and the locking tooth bar (13) is fixed between the inner wall of the middle tube (12) and the limiting plate.

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