Pull-up trainer

Abstract

The utility model discloses a pull-up trainer which comprises a first fixing support and a second fixing support, the first fixing support and the second fixing support are fixed on a wall through bolts, a first gear shifting box and a second gear shifting box are fixedly installed on the first fixing support and the second fixing support, and the first gear shifting box comprises a box body. The box body comprises a first side plate, a second side plate, a top plate and a bottom plate, a connecting shaft, a top bolt sleeve, a top bolt and an inner bolt are fixedly installed in the box body, the top bolt is installed in the top bolt sleeve in an up-down sliding mode, and the upper end of the inner bolt is rotationally connected with the connecting shaft; the two ends of the horizontal bar penetrate through the strip-shaped holes in the first gear shifting box and the second gear shifting box respectively, then stretch into the first gear shifting box and the second gear shifting box and are supported on the inner bolt, and when the horizontal bar is lifted upwards or pulled downwards, the position, supported on the inner bolt, of the horizontal bar is adjustable. The device can be mounted at indoor and outdoor corners without influencing activities; the horizontal bar can be adjusted in height and cannot move left and right, and exercise is convenient; the horizontal bar triangle fixes wall corners, and installation is safe and reliable.

Description

Technical Field

[0001] This utility model relates to sports equipment, specifically to a pull-up training device. Background Technology

[0002] Junior high school students are in a sensitive period of rapid development in their physical fitness. Actively participating in various forms of sports activities can effectively enhance their strength, speed, endurance, and flexibility. Among these, pull-ups on a horizontal bar can significantly increase upper limb strength, strength endurance, coordination, and explosive power, highlighting the masculinity and healthy physique of junior high school students, and fostering vigorous learning motivation and youthful energy. The traditional configuration of horizontal bar equipment in schools can only meet the needs of classroom gymnastics instruction; it is far from sufficient for pull-up practice during physical education classes or for students to practice pull-ups during breaks.

[0003] Meanwhile, pull-ups are an important part of the "National Student Physical Fitness and Health Standards (2014 Revision)" test and also a physical education exam item in the high school entrance examination. Pull-ups can effectively promote the development of upper limb muscle strength, such as rapid and powerful arm swings and trunk explosive power, which can improve athletic performance in events such as shot put, sit-ups, and the 50-meter sprint.

[0004] Therefore, based on the need for junior high school students to improve their upper limb strength during the 15-minute break between classes, a pull-up training device that is easy to popularize and convenient to practice has been developed. Summary of the Invention

[0005] This invention addresses the problems existing in the prior art by proposing a pull-up training device that can be installed in corners indoors and outdoors without affecting activities; the horizontal bar can be adjusted in height but cannot be moved left or right, making practice convenient; the horizontal bar is fixed to the corner of the wall in a triangle, ensuring safe and reliable installation.

[0006] The technical solution adopted by this utility model is: a pull-up trainer for fixed installation in a corner of a wall, including a first fixed bracket (1) and a second fixed bracket (2). The first fixed bracket and the second fixed bracket are fixed to the wall by bolts. One end of the first fixed bracket and the second fixed bracket are fixedly connected, and the other end is respectively fixedly installed with a first gear adjustment box (3) and a second gear adjustment box (4). The first gear adjustment box and the second gear adjustment box are symmetrically arranged.

[0007] The first gear shift box includes a box body with a cavity. The box body includes a first side plate (5), a second side plate (6), a top plate (7), and a bottom plate (8). The first side plate has a strip hole (9). A connecting shaft (10), a top bolt sleeve (11), a top bolt (12), and an inner bolt (13) are fixedly installed inside the box body.

[0008] The top bolt sleeve is fixed to the second side plate, and the top bolt is slidably installed inside the top bolt sleeve.

[0009] The upper end of the inner bolt is rotatably connected to the connecting shaft, while the lower end is a free end and is set parallel to the top bolt.

[0010] The two ends of the single bar (25) pass through the strip holes on the first gear shift box and the second gear shift box respectively, and then extend into the first gear shift box and the second gear shift box and rest on the inner bolt.

[0011] The position of the horizontal bar on the inner bolt is adjustable when lifting upwards or pulling downwards.

[0012] Based on the above scheme, as a preferred option, there is a gap between the top bolt sleeve and the bottom plate, and the friction between the top bolt and the top bolt sleeve is greater than the weight of the inner bolt.

[0013] Based on the above scheme, as a preferred option, the top bolt includes a vertical part (14), an upper horizontal part (15), and a lower horizontal part (16). The vertical part is installed inside the top bolt sleeve. The inner bolt is provided with a first groove (17) and a second groove (18) at intervals in the vertical direction on the side opposite to the top bolt. The upper part of the first groove and the second groove and the bottom of the inner bolt corresponding to the first groove in the vertical direction are inclined surfaces (19). The inclined surfaces slope from top to bottom from the side closer to the top bolt to the side farther away.

[0014] Based on the above scheme, as a preferred option, the vertical part, the upper horizontal part, and the lower horizontal part are plates or rods. The upper horizontal part of the top bolt is located in the first groove and has a clearance fit with the side wall of the first groove. The lower horizontal part is located below the inner bolt. Under normal conditions, the lower horizontal part is located on the bottom plate and contacts the upper surface of the bottom plate.

[0015] Based on the above scheme, as a preferred option, the bottom of the first groove and the second groove are concave surfaces that match the single bar.

[0016] Based on the above scheme, as a preferred option, the single bar includes a rod (20) and a limiting baffle (21) set on the rod. There are two limiting baffles, which are symmetrically arranged. The limiting baffles are in contact or clearance fit with the outer end face of the corresponding first side plate. The rod is supported on the lower horizontal part or the bottom of the second groove or the bottom of the first groove.

[0017] Based on the above scheme, as a preferred option, an anti-rotation block (22) is also fixedly installed on the rod. There are two anti-rotation blocks, which are symmetrically arranged. The anti-rotation blocks are located inside the strip hole and are in contact or clearance fit with the side wall of the strip hole.

[0018] Based on the above scheme, as a preferred option, at least one reinforcing plate (23) is provided inside the first gear box. The reinforcing plate is arranged parallel to the first side plate, and one end of the connecting shaft is fixed on the reinforcing plate and the other end is fixed on the first side plate.

[0019] Based on the above scheme, as a preferred option, the connecting shaft does not protrude from the first side plate.

[0020] Based on the above scheme, as a preferred option, the connection between the first side plate and the second side plate is rounded (24).

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] It can be installed in corners both indoors and outdoors without affecting activities.

[0023] The horizontal bar can be adjusted in height but cannot be moved left or right, making it convenient for practice.

[0024] A single-bar triangle is used to fix the corner of the wall, ensuring safe and reliable installation.

[0025] This invention can better utilize the benefits of short bar pull-ups during the 15-minute break between classes, allowing students to enjoy a happy and relaxing time for exercise while practicing pull-ups on the short bar, and increasing communication, friendship, and strength during the activity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is a perspective view of the present invention;

[0029] Figure 4 This is a diagram of the internal structure of the gear shift box of this utility model;

[0030] Figure 5 This is a schematic diagram of the initial state of the single bar;

[0031] Figure 6 This is a schematic diagram of the structure where the horizontal bar moves upward to open the top bolt;

[0032] Figure 7 This is a schematic diagram of the structure when the single bar is located in the second groove;

[0033] Figure 8 This is a schematic diagram of the structure of the single bar opening the top bolt when it moves towards the first groove;

[0034] Figure 9 This is a schematic diagram of the structure when the single bar is located in the first groove;

[0035] Figure 10 This is a schematic diagram of the structure of a single bar pushing upwards to the horizontal part and opening the top bolt;

[0036] Figure 11 This is a schematic diagram of the structure of the horizontal bar falling to the lower horizontal position;

[0037] Figure 12This is a schematic diagram of the top bolt repositioning. Detailed Implementation

[0038] The present invention will be further described below through embodiments, but the scope of the present invention is not limited thereto.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] like Figure 1-4 As shown, a pull-up training device suitable for junior high school students on campus includes a first fixed support 1 and a second fixed support 2. One end of the first fixed support and the second fixed support are fixedly connected to the corner of a wall in a classroom, corridor, or other location in the school to form a support frame, usually at a right angle. The first fixed support and the second fixed support are fixed to the wall with bolts.

[0041] The other ends of the first fixed bracket and the second fixed bracket are respectively fixedly installed with the first gear shift box 3 and the second gear shift box 4, and the first gear shift box and the second gear shift box are symmetrically arranged.

[0042] The first gear shift box includes a box body with a cavity. The box body includes a first side plate 5, a second side plate 6, a top plate 7, and a bottom plate 8. The first side plate has a strip hole 9. A connecting shaft 10, a top bolt sleeve 11, a top bolt 12, and an inner bolt 13 are fixedly installed inside the box body.

[0043] The connecting shaft is axially horizontal.

[0044] The top bolt is fixed to the second side plate and is spaced apart from the bottom plate.

[0045] The top bolt is slidably installed in the top bolt sleeve. The top bolt includes a vertical part 14, an upper horizontal part 15, and a lower horizontal part 16. The vertical part, upper horizontal part, and lower horizontal part can be plates or rods, with plates being preferred.

[0046] The upper end of the inner bolt is rotatably connected to the connecting shaft, while the lower end is a free end, and it is arranged parallel to the top bolt. On the side of the inner bolt opposite to the top bolt, there are a first groove 17 and a second groove 18 spaced apart in the vertical direction. The bottom of the first and second grooves are flat, while the upper part and the bottom of the inner bolt corresponding to the first groove in the vertical direction are inclined surfaces 19. The inclined surfaces slope downwards from the side closer to the top bolt to the side farther away. The inclination angle of the inclined surfaces can be 20-60 degrees, such as 20, 30, 40, 50, 60 degrees, etc.

[0047] The upper horizontal part of the top bolt is located in the first groove and has a clearance fit with the side wall of the first groove. The lower horizontal part is located below the inner bolt. Under normal conditions, the lower horizontal part is located on the bottom plate and contacts the upper surface of the bottom plate.

[0048] The single bar 25 includes a bar 20 and a limiting stop 21 and an anti-rotation block 22 disposed on the bar. There are two limiting stops and two anti-rotation blocks, which are symmetrically arranged. The two ends of the bar pass through the strip holes on the two adjustment boxes (first adjustment box and second adjustment box) and are mounted on the lower horizontal part or the bottom of the second groove or the bottom of the first groove. The anti-rotation block is located in the strip hole and is in contact or clearance fit with the side wall of the strip hole to prevent the bar from rotating.

[0049] The bottom of the first and second grooves has an arc-shaped groove 26, and the rod is supported in the arc-shaped groove. Of course, the arc-shaped groove design can be omitted, and a flat surface can be used directly.

[0050] The limiting baffle is in contact or clearance fit with the corresponding outer end face of the first side plate to prevent the single bar from moving axially.

[0051] Since the gear shift box has a hollow structure, at least one reinforcing plate 23 is installed inside to ensure its strength. The reinforcing plate is parallel to the first side plate. One end of the connecting shaft is fixed to the reinforcing plate, and the other end is fixed to the first side plate. It is best if the connecting shaft does not protrude from the first side plate, but it can be used normally if it protrudes slightly. Each side of the reinforcing plate is fixedly connected to the first side plate, the second side plate, the top plate, the bottom plate, etc., to form the various plates of the gear shift box. This can improve the strength of the gear shift box and facilitate the installation of the connecting shaft.

[0052] The gearbox can also be used with reinforcing ribs, which are installed in unused areas on its inner wall to increase the strength of the plate.

[0053] After installation, the end of the horizontal bar is located between the reinforcing plate and the inner bolt to ensure the stability of the support.

[0054] The connection between the first and second side panels has a 24mm rounded corner to prevent damage from sharp corners and to protect against impacts.

[0055] With the vertical direction as a reference, the first groove forms the first gear, the second groove forms the second gear, and the bottom of the inner bolt and the base plate form the third gear. The three gears are used for height adjustment to suit students of different heights and facilitate students' practice of pull-ups.

[0056] Initially, the horizontal bar is in the third position, such as... Figure 5 As shown, when shifting gears, push the bar upwards with force. The bar moves upwards along the strip hole. Under the action of the inclined plane corresponding to the third gear, the inner bolt rotates freely around the connecting shaft. Figure 6Continue pushing upwards in this state. When the bar reaches the second position, the inner latch will reset under gravity, at which point you can lower the bar. Figure 7 As shown, position it in the second gear, i.e., the second groove, for pull-up training. To adjust the gear further, push the bar upwards. The bar will push the inclined plane in the second gear, causing the inner bolt to rotate freely. Figure 8 Continue pushing upwards until the bar reaches the first groove. At this point, the inner bolt automatically resets under gravity, allowing you to lower the bar to the first position. Figure 9 As shown, pull-up training can be performed. During the adjustment process described above, the bar should not touch the upper horizontal section, and the top bolt should remain in its initial stationary state. To return to the third position, i.e., to reset, push the bar upwards with force until it reaches the upper horizontal section, and continue pushing upwards. The inner bolt will rotate under the action of the upper horizontal section, with the rotation angle as shown. Figure 10 As shown, at this point, the top bolt is positioned at this height by the friction of the top bolt sleeve. The downward component of the weight of the inner bolt is less than the friction force, so it cannot automatically reset. At this time, the horizontal bar can be lowered to the lower horizontal position, as shown. Figure 11 As shown, under the weight of the horizontal bar and the force of the person pulling down on the bar, the lower horizontal section and the bar move downwards together to the base plate. At the same time, the inner bolt disengages from the support of the upper horizontal section and automatically resets. Figure 12 As shown.

[0057] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. A pull-up trainer for fixed installation in a corner of a wall, characterized in that, The system includes a first fixed bracket (1) and a second fixed bracket (2), which are fixed to the wall by bolts. One end of the first fixed bracket and the second fixed bracket are fixedly connected, and the other end is respectively fixedly installed with a first gear shift box (3) and a second gear shift box (4). The first gear shift box and the second gear shift box are symmetrically arranged. The first gear shift box includes a box body with a cavity. The box body includes a first side plate (5), a second side plate (6), a top plate (7), and a bottom plate (8). The first side plate has a strip hole (9). A connecting shaft (10), a top bolt sleeve (11), a top bolt (12), and an inner bolt (13) are fixedly installed inside the box body. The top bolt sleeve is fixed to the second side plate, and the top bolt is slidably installed inside the top bolt sleeve. The upper end of the inner bolt is rotatably connected to the connecting shaft, while the lower end is a free end and is set parallel to the top bolt. The two ends of the single bar (25) pass through the strip holes on the first gear shift box and the second gear shift box respectively, and then extend into the first gear shift box and the second gear shift box and rest on the inner bolt. The position of the horizontal bar on the inner bolt is adjustable when lifting upwards or pulling downwards.

2. The pull-up trainer as described in claim 1, characterized in that, There is a gap between the top bolt sleeve and the bottom plate, and the friction between the top bolt and the top bolt sleeve is greater than the weight of the inner bolt.

3. The pull-up trainer as described in claim 1, characterized in that, The top bolt includes a vertical part (14), an upper horizontal part (15), and a lower horizontal part (16). The vertical part is installed inside the top bolt sleeve. The inner bolt is provided with a first groove (17) and a second groove (18) at intervals in the vertical direction on the side opposite to the top bolt. The upper part of the first groove and the second groove and the bottom of the inner bolt corresponding to the first groove in the vertical direction are inclined surfaces (19). The inclined surfaces slope from top to bottom from the side closer to the top bolt to the side farther away.

4. The pull-up trainer as described in claim 3, characterized in that, The vertical part, the upper horizontal part, and the lower horizontal part are plates or rods. The upper horizontal part of the top bolt is located in the first groove and has a clearance fit with the side wall of the first groove. The lower horizontal part is located below the inner bolt. Under normal conditions, the lower horizontal part is located on the bottom plate and contacts the upper surface of the bottom plate.

5. The pull-up trainer as described in claim 1, characterized in that, The bottom of the first and second grooves is a concave surface that matches the horizontal bar.

6. The pull-up trainer as described in claim 3, characterized in that, The single bar includes a bar (20) and a limiting plate (21) set on the bar. There are two limiting plates, which are symmetrically arranged. The limiting plates are in contact or clearance fit with the outer end face of the corresponding first side plate. The bar is supported on the lower horizontal part or the bottom of the second groove or the bottom of the first groove.

7. The pull-up trainer as described in claim 6, characterized in that, An anti-rotation block (22) is also fixedly installed on the rod. There are two anti-rotation blocks, which are symmetrically arranged. The anti-rotation blocks are located inside the strip hole and are in contact or clearance fit with the side wall of the strip hole.

8. The pull-up trainer as described in claim 1, characterized in that, At least one reinforcing plate (23) is provided inside the first gear box. The reinforcing plate is set parallel to the first side plate. One end of the connecting shaft is fixed on the reinforcing plate, and the other end is fixed on the first side plate.

9. The pull-up trainer as described in claim 8, characterized in that, The connecting shaft does not protrude from the first side plate.

10. The pull-up trainer as described in claim 8, characterized in that, The connection between the first side plate and the second side plate is rounded (24).

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