Telescopic rod transmission structure of horizontal bar

Abstract

The present invention provides a telescopic rod transmission structure of a horizontal bar, which includes a main body, through holes are provided at both ends of the main body, and the telescopic rods on both sides are inserted into the through holes and can move axially along the through holes, the telescopic rods on both sides are parallel, and the telescopic rods are limited in relative rotation with the main body, and a gear set for input and output direction-changing transmission is provided in the main body, and a screw rod is provided, and the gear set includes a main tooth portion and a driven tooth portion, and a threaded connection portion is provided on the telescopic rod, the screw rod is threadedly connected to the threaded connection portion, the screw rod is connected to the driven tooth portion, the main tooth portion is connected to the adjustment portion, the adjustment portion drives the main tooth portion to rotate, and the rotation axis of the main tooth portion is perpendicular to the axis of the screw rod. The advantage of the present invention is that it is more stable to adjust, and the adjustment portion has a self-locking effect when the adjustment portion is not driven to rotate, so that the telescopic rod can be stably supported without loosening, and it can adjust the telescopic rods at both ends synchronously, which is more labor-saving than the single-stage adjustment.

Description

Technical Field

[0001] The invention relates to the field of fitness equipment, in particular to a telescopic rod transmission structure of a horizontal bar. Background Art

[0002] Fitness is very important to everyone, and long-term fitness is especially beneficial to people. Moreover, people are now more and more pursuing convenience, and the pursuit of being able to exercise anytime and anywhere. Currently, the pull-up bars commonly used in the market are mostly fixed between door frames or between walls.

[0003] For example, the structure disclosed in patent publication number CN201537346U describes a telescopic tube with multiple sections of threaded connections, wherein the length of the telescopic tube changes due to rotation.

[0004] There is also a patent publication number CN205699053U that discloses an indoor multifunctional fitness bar, including: an intermediate bar, a threaded bar, an iron bar frame, a 90° rotatable hinge, a threaded connection structure, a disassembly bar, and a live joint. Through the 90° rotatable hinge and the threaded connection, the intermediate bar and the threaded bar are connected by an intermediate fixing screw and an inner nut to make them stable, and the two ends are live joints, which are connected to a detachable and replaceable shaft through a threaded connection to realize a detachable multifunctional fitness bar to complete indoor multifunctional fitness exercises. However, the fitness bar of this structure is inconvenient to fix it between door frames or walls. It will become loose when fixed between door frames or walls. If it falls off during use, it will cause harm to the user. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a telescopic rod transmission structure of a horizontal bar which is more convenient to assemble and disassemble and more firmly fixed.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a telescopic rod transmission structure of a horizontal bar, which includes a main body, through holes are provided at both ends of the main body, and the telescopic rods on both sides are inserted into the through holes and can move along the axial direction of the through holes.

[0007] The telescopic rods on both sides are parallel, and the telescopic rods and the main body are limited in relative rotation.

[0008] The main body is provided with a gear set for input and output direction-changing transmission, and a screw rod, the gear set includes a main gear portion and a driven gear portion, the telescopic rod is provided with a threaded connection portion, the screw rod is threadedly connected to the threaded connection portion,

[0009] The screw rod is connected to the driven tooth portion, and the main tooth portion is connected to the adjusting portion. The adjusting portion drives the main tooth portion to rotate, and the rotation axis of the main tooth portion is perpendicular to the axis of the screw rod.

[0010] The main tooth portion includes a first bevel tooth, and the driven tooth portion includes a second bevel tooth. The axes of the first bevel tooth and the second bevel tooth are perpendicular, and the axis of the second bevel tooth is horizontal to the axis of the screw rod.

[0011] The main tooth portion includes a spherical tooth plate, the annular teeth of the spherical tooth plate are arranged on one side of the spherical tooth plate, the annular teeth include spur teeth / helical teeth / spiral teeth, and the driven tooth portion includes a gear shaft, one end of which is provided with corresponding spur gears / helical gears / spiral teeth.

[0012] The screw rod is fixedly connected with a driven tooth portion, and both ends of the screw rod are provided with forward and reverse threads, and both ends of the screw rod are respectively connected with a telescopic rod.

[0013] The screw rod is connected with two driven tooth parts, one of which is fixedly connected with the screw rod, and the other is rotatably connected with the screw rod. Both ends of the screw rod are provided with forward and reverse threads, and both ends of the screw rod are connected with telescopic rods.

[0014] Two parallel screw rods are arranged in the main body, each screw rod is fixed to a driven tooth portion, and each screw rod is connected to a telescopic rod.

[0015] The screw rod is connected with the shaft sleeve / bearing, the outer ring of the shaft sleeve / bearing is limited on the inner wall of the main body, and the threaded connection part on the telescopic rod includes a nut, which is coaxial with the shaft sleeve / bearing.

[0016] The main body is provided with a slot hole, and the adjusting part is exposed from the slot hole.

[0017] The telescopic rod is provided with a sliding groove in the axial direction, the main body is fixedly connected with the sliding key, and the sliding groove on the telescopic rod slides in cooperation with the sliding key.

[0018] The telescopic rod transmission structure of the horizontal bar includes a main body, and through holes are arranged at both ends of the main body. The telescopic rods on both sides are inserted into the through holes and can move along the axial direction of the through holes.

[0019] The telescopic rods on both sides are parallel, and the telescopic rods and the main body are limited in relative rotation.

[0020] The main body is provided with a gear set for input and output direction-changing transmission, and a lead screw. The gear set includes a first worm wheel / worm connected to the adjustment part and a second worm wheel / worm connected to the lead screw. The first worm wheel / worm and the second worm wheel / worm are vertically variable in direction.

[0021] Compared with the prior art, the invention has the advantages that its adjustment is more stable, and the adjustment part has a self-locking effect when it is not driven to rotate, so that the telescopic rod can be stably supported without loosening.

[0022] It can adjust the telescopic rods at both ends synchronously, which is more labor-saving than single-stage adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only drawn for the purpose of illustrating the background technology and explaining the preferred embodiments, and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 It is a structural schematic diagram of Embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 A partial exploded view of

[0026] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0027] Figure 4 is a cross-sectional view of embodiment 1;

[0028] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0029] Figure 6 It is a cross-sectional view of the second embodiment of the present invention;

[0030] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0031] Figure 8 It is a cross-sectional view of the third embodiment of the present invention;

[0032] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0033] Fig.10 It is a cross-sectional view of the fourth embodiment of the present invention;

[0034] Fig.11 for Fig.10 A partial enlarged view of point E in the middle;

[0035] Fig.12 It is a cross-sectional view of the fifth embodiment of the present invention;

[0036] Fig.13 for Fig.12 A partial enlarged view of point F in the middle.

[0037] In the figure: 1 main body; 2 telescopic rod; 3 limit sleeve; 4 sliding key; 5 sliding groove; 6 contact part; 7 contact surface; 8 anti-slip protrusion; 9 screw rod; 10 first bevel tooth; 11 second bevel tooth; 12 sleeve; 13 nut; 14 slot; 15 adjustment part; 16 hand-held rotating part; 17 placement slot; 18 through slot; 19 cover; 20 spirit level; 21 decorative shell; 22 first worm gear; 23 first worm; 24 second worm gear; 25 second worm. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] In the first to third embodiments, the gear set adopts several connection forms of the first bevel gear 10 and the second bevel gear 11. When the gear set adopts a spherical gear plate and a gear shaft, the connection is the same as the structure of the first to third embodiments, so the combination of the spherical gear plate and the gear shaft is not described in detail.

[0040] Embodiment 1: Figure 1-5 As shown, the present invention comprises a main body 1, and through holes are provided at both ends of the main body 1. Preferably, the main body 1 is a tubular structure, and the through hole runs through the entire main body 1. The telescopic rods 2 are inserted into the through hole of the main body 1, and the telescopic rods 2 on both sides are parallel. The telescopic rods 2 on both sides are inserted into the through hole and can move along the axial direction of the through hole.

[0041] The telescopic rod 2 and the main body 1 are rotationally restricted. Specifically, the main body 1 is provided with a protruding sliding key 4, and the telescopic rod 2 is provided with a sliding groove 5 adapted to the sliding key 4, and the sliding key 4 extends into the sliding groove 5 for sliding fit. Preferably, the sliding key 4 is provided at both ends of the main body 1. More preferably, the main body 1 is connected with a limiting sleeve 3, and the limiting sleeve 3 is provided with an integrally formed inwardly protruding sliding key 4, and the limiting sleeve 3 is connected to the main body 1 by threads, or screws, or rivets, or pins, or fastening and plugging, and the limiting sleeve 3 is provided at the through hole of the main body 1.

[0042] Contact parts 6 can be provided at both ends of the telescopic rod 2, and the contact parts 6 are provided with contact surfaces 7, and anti-slip protrusions 8 are provided on the contact surfaces 7. When in use, the telescopic rod 2 is axially extended and contracted, and the contact parts 6 at the ends of the telescopic rod 2 are pressed against the door frame or the wall.

[0043] The main body 1 is provided with a main tooth portion and a screw rod 9, the screw rod 9 is parallel to the telescopic rod 2, the telescopic rod 2 is provided with a threaded connection portion, the screw rod 9 is threadedly connected to the threaded connection portion, and preferably, the threaded connection portion includes a nut 13 fixed relative to the telescopic rod 2. The screw rod 9 is connected with a driven tooth portion meshing with the main tooth portion.

[0044] The main tooth portion includes a first bevel tooth 10, and the driven tooth portion includes two second bevel teeth 11, one of which is fixedly connected to the screw rod 9, and the other second bevel tooth 11 is rotatably connected to the screw rod 9, the first bevel tooth 10 and the two second bevel teeth 11 are meshed, and both ends of the screw rod 9 are provided with forward and reverse threads, and both ends of the screw rod 9 are connected to the telescopic rod 2. The screw rod 9 is threadedly connected to the threaded connection part on the telescopic rod 2, and the screw rod 9 is rotated to cause the telescopic rod 2 to expand and contract in the axial direction. The use of the bevel tooth structure can be automatically locked, and the rotation can be transmitted by changing the direction by 90 degrees.

[0045] The two second bevel teeth 11 can support the first bevel tooth 10 , thereby preventing the first bevel tooth 10 from being offset from the single second bevel tooth 11 , thereby preventing the angle from being stuck.

[0046] The screw rod 9 is connected with a sleeve 12, the outer ring of the sleeve 12 is limited on the inner wall of the main body 1, and the sleeve 12 is located on the side of the second bevel gear 11 to support and rotate smoothly. Preferably, the sleeve 12 is coaxial with the nut 13, the nut 13 is screwed on the screw rod 9, the end of the nut 13 is pressed on the telescopic rod 2, and the nut 13 controls the telescopic movement of the telescopic rod 2.

[0047] In addition, a through slot 18 is provided on the main body 1. During assembly, the main tooth portion is inserted into the through slot 18. The cover 19 is detachably connected to the main body 1 to cover the through slot 18. A slot hole 14 is provided on the cover 19. The main tooth portion is connected to the adjusting portion 15. The adjusting portion 15 is exposed from the slot hole 14. Preferably, the main tooth portion and the adjusting portion 15 are integrally formed.

[0048] Preferably, the adjustment portion 15 on the main tooth portion can be an adjustment hole, and a handheld rotating member 16 adapted to the adjustment portion 15 is provided. By inserting the handheld rotating member 16 into the adjustment hole, the telescopic rod 2 of the fitness bar can be tightened in the door frame or the fitness bar can be loosened, and the handheld rotating member 16 can be removed when not in use.

[0049] A decorative shell 21 is disposed on the main body 1 , and a placement groove 17 for placing the handheld rotating member 16 is disposed on the decorative shell 21 .

[0050] A level 20 is also provided on the decorative shell 21 for observing whether the fitness bar is balanced during installation.

[0051] In another way, the adjusting portion 15 on the main tooth portion can be a knob, and the knob is exposed. By rotating the knob, the telescopic rod 2 of the fitness bar can be pressed tightly against the door frame or the fitness bar can be loosened.

[0052] Embodiment 2: Figure 6-7As shown, other structures are the same as those of the first embodiment, the difference being that the main tooth portion includes a first bevel tooth 10, and the driven tooth portion is only a second bevel tooth 11 fixedly connected to the screw rod, the first bevel tooth 10 and the second bevel tooth 11 are meshed, and both ends of the screw rod 9 are provided with forward and reverse threads, and both ends of the screw rod 9 are respectively connected to the telescopic rod 2.

[0053] Preferably, a sleeve 12 or a bearing is sleeved on the screw rod 9, and the outer ring of the sleeve 12 or the bearing is fixed to the inner wall of the main body 1. The sleeve 12 or the bearing is used to balance the axis of the second bevel gear 11.

[0054] Embodiment 3: Figure 8-9 As shown, other structures are the same as those of the first embodiment, except that the main tooth portion includes a first bevel tooth 10, the driven tooth portion includes two second bevel teeth 11, two parallel screw rods 9 are provided, each screw rod 9 is provided with a fixed second bevel tooth 11, the first bevel tooth 10 is meshed with the second bevel tooth 11, and each screw rod 9 is connected to a telescopic rod 2.

[0055] Embodiment 4: Figure 10-11 As shown, the present invention includes a main body 1, through holes are provided at both ends of the main body 1, telescopic rods 2 on both sides are inserted into the through holes and can move axially along the through holes, the telescopic rods 2 are parallel, the telescopic rods 2 and the main body 1 are restricted from rotation, contact parts 6 are provided at both ends of the telescopic rod 2, a first worm gear 22 and a screw 9 are provided in the main body 1, the first worm gear 22 is connected to the adjusting part 15, a slot 14 is provided on the main body 1, the adjusting part 15 is exposed from the slot 14, the screw 9 is parallel to the telescopic rod 2, a threaded connection part is provided on the telescopic rod 2, the screw 9 is threadedly connected to the threaded connection part, the screw 9 is connected to the first worm 23, and the first worm gear 22 and the first worm 23 are variable-direction transmission.

[0056] Embodiment 5: Figure 12-13 As shown, other structures are the same as those of the fourth embodiment, the difference being that a second worm 25 and a lead screw 9 are provided in the main body 1, the second worm 25 is connected to the adjusting portion 15, a slot 14 is provided on the main body 1, the adjusting portion 15 is exposed from the slot 14, the lead screw 9 is parallel to the telescopic rod 2, a threaded connection portion is provided on the telescopic rod 2, the lead screw 9 is threadedly connected to the threaded connection portion, a second worm wheel 24 is connected to the lead screw 9, and the second worm wheel 24 and the second worm 25 are transmitted in a variable direction.

[0057] In the above embodiment, the threaded connection portion on the screw rod 9 may also be a thread provided in the telescopic rod 2, that is, the telescopic rod 2 is sleeved on the screw rod 9 and threadedly connected thereto.

[0058] There are many ways to restrict the rotation of the telescopic rod 2 and the main body 1, which can also be: 1. The sliding key 4 is arranged on the inner wall of the main body 1, and the sliding groove 5 is arranged on the telescopic rod 2; 2. The sliding key 4 is arranged on the telescopic rod 2, and the sliding groove 5 is arranged on the inner wall of the main body 1.

[0059] Those skilled in the art will appreciate that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0060] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0061] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0062] The present invention is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. The telescopic rod transmission structure of the horizontal bar is characterized by: It includes a main body, with through holes at both ends of the main body, and telescopic rods at both ends are inserted into the through holes and can move along the axial direction of the through holes. The telescopic rods on both sides are parallel, and the telescopic rods and the main body are limited in relative rotation. The main body is provided with a gear set for input and output direction-changing transmission, and a screw rod, the gear set includes a main gear portion and a driven gear portion, the telescopic rod is provided with a threaded connection portion, the screw rod is threadedly connected to the threaded connection portion, The screw rod is connected to the driven tooth portion, and the main tooth portion is connected to the adjusting portion. The adjusting portion drives the main tooth portion to rotate, and the rotation axis of the main tooth portion is perpendicular to the axis of the screw rod.

2. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The main tooth portion includes a first bevel tooth, and the driven tooth portion includes a second bevel tooth. The axes of the first bevel tooth and the second bevel tooth are perpendicular, and the axis of the second bevel tooth is horizontal to the axis of the screw rod.

3. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The main tooth portion includes a spherical tooth plate, the annular teeth of the spherical tooth plate are arranged on one side of the spherical tooth plate, the annular teeth include spur teeth / helical teeth / spiral teeth, and the driven tooth portion includes a gear shaft, one end of which is provided with corresponding spur gears / helical gears / spiral teeth.

4. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The screw rod is fixedly connected with a driven tooth portion, and both ends of the screw rod are provided with forward and reverse threads, and both ends of the screw rod are respectively connected with a telescopic rod.

5. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The screw rod is connected with two driven tooth parts, one of which is fixedly connected with the screw rod, and the other is rotatably connected with the screw rod. Both ends of the screw rod are provided with forward and reverse threads, and both ends of the screw rod are connected with telescopic rods.

6. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: Two parallel screw rods are arranged in the main body, each screw rod is fixed to a driven tooth portion, and each screw rod is connected to a telescopic rod.

7. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The screw rod is connected with the shaft sleeve / bearing, the outer ring of the shaft sleeve / bearing is limited on the inner wall of the main body, and the threaded connection part on the telescopic rod includes a nut, which is coaxial with the shaft sleeve / bearing.

8. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The main body is provided with a slot hole, and the adjusting part is exposed from the slot hole.

9. The telescopic rod transmission structure of the horizontal bar according to claim 1, characterized in that: The telescopic rod is provided with a sliding groove in the axial direction, the main body is fixedly connected with the sliding key, and the sliding groove on the telescopic rod slides in cooperation with the sliding key.

10. The telescopic rod transmission structure of the horizontal bar is characterized in that: It includes a main body, with through holes at both ends of the main body, and telescopic rods at both ends are inserted into the through holes and can move along the axial direction of the through holes. The telescopic rods on both sides are parallel, and the telescopic rods and the main body are limited in relative rotation. The main body is provided with a gear set for input and output direction-changing transmission, and a lead screw. The gear set includes a first worm wheel / worm connected to the adjustment part and a second worm wheel / worm connected to the lead screw. The first worm wheel / worm and the second worm wheel / worm are vertically variable in direction.

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