An oil-free limiting structure

Abstract

The application provides an oil-free limiting structure, which comprises a sleeve, an outer square shaft sleeve, an inner square shaft sleeve and a rubber strip. The outer square shaft sleeve is fixedly installed in the sleeve in a limiting mode and is opposite to the sleeve in a circumferential direction. The inner square shaft sleeve is installed in the outer square shaft sleeve. The rubber strip is installed in a gap between the inner square shaft sleeve and the outer square shaft sleeve. When the inner square shaft sleeve rotates relative to the outer square shaft sleeve, the rubber strip is extruded to generate damping. The inner square shaft sleeve and the sleeve are connected through a limiting assembly to limit the maximum rotation angle between the inner square shaft sleeve and the sleeve. The application is designed without oil, and can be used without oil supply, thereby reducing the maintenance frequency. The soft limiting makes the swing more stable, and is not prone to generate friction and noise. The user can use the fitness facility with different damping forces in the use process, and the use experience is improved. The application has the functions of safety, reliability, low maintenance, low noise and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machinery, and particularly relates to an oil-free limiting structure. BACKGROUND

[0002] With the continuous rise of the fitness craze, the use frequency of the public to the outdoor sports facilities is continuously improved, and the safety of the outdoor sports facilities needs special attention. The traditional outdoor fitness facilities cannot provide the limitation of the swing angle, or continue to move after reaching the hard limiting position, and the swing structure loses the function due to being stuck. Based on the safety, quality and life requirements of the outdoor fitness facilities, an oil-free limiting structure is used to control the stroke and angle of the swing structure in the outdoor fitness equipment, prevent the swing structure from reaching a dangerous angle due to excessive force of the user, and cause sports injuries. The position limitation of the dynamic swing type fitness equipment is used to ensure the reliability and safety of the structural swing of the outdoor fitness facilities. SUMMARY

[0003] In order to solve the problems of sports injuries caused by dangerous swing angles, swing structure sticking, short product life, and time-consuming and laborious oil maintenance in the prior art, the present application provides an oil-free limiting structure, which is suitable for improving the safety performance and service life of all swing type products, especially swing type fitness facilities.

[0004] The present application adopts the following technical scheme: an oil-free limiting structure, comprising:

[0005] A sleeve is used for fixedly connecting a hanger;

[0006] An outer shaft sleeve is limitedly installed in the sleeve and fixedly connected with the sleeve in the circumferential direction;

[0007] An inner shaft sleeve is installed in the outer shaft sleeve, a rubber strip is installed in the gap between the inner shaft sleeve and the outer shaft sleeve, and the rubber strip is extruded to generate damping when the inner shaft sleeve rotates relative to the outer shaft sleeve;

[0008] The inner shaft sleeve and the sleeve are connected through a limiting assembly to limit the maximum rotation angle between the inner shaft sleeve and the sleeve.

[0009] Further, when the rubber strip is not extruded by the rotation of the inner shaft sleeve, the pre-set included angle between the inner shaft sleeve and the outer shaft sleeve is 30 degrees.

[0010] Further, the rubber strip is four, the cross section is originally circular, and the cross section is approximately triangular after deformation under pressure.

[0011] Further, the sleeve is fixedly connected with a bending piece, and the bending part of the bending piece is matched with the shape of the outer surface of the outer shaft sleeve.

[0012] Further, the limiting assembly comprises:

[0013] A round bar is fixedly connected to the inner wall of the sleeve near the end portion;

[0014] A limiting block is installed at the end portion of the sleeve, the limiting block is provided with a positioning hole, the round bar is limited in the positioning hole, and the limiting block is provided with a limiting clamping groove;

[0015] A limiting clamping piece is provided with a limiting protruding piece matched with the limiting clamping groove, and the limiting clamping piece is provided with a square through hole matched with the inner square shaft sleeve, and the end portion of the inner square shaft sleeve penetrates through the square through hole.

[0016] Further, a seat arm assembly is provided, the seat arm assembly is provided with a square through hole on the upwardly extending portion on both sides of the upper end, the end portion of the inner square shaft sleeve penetrates through the square through hole, and an end cover, a gasket, a bolt and an anti-theft cap are installed at the end portion of the inner square shaft sleeve.

[0017] Further, the end portion of the inner square shaft sleeve is provided with a threaded hole matched with the bolt.

[0018] Compared with the prior art, the beneficial effects of the present application are that:

[0019] The oil-free design can be used without oil supply, and the maintenance frequency is reduced;

[0020] The device is suitable for various use environments and can guarantee normal operation under harsh conditions of high temperature and low temperature;

[0021] The bearing structure is pressed into a rubber strip, the sealing is firm, and the waterproof and dustproof are reliable;

[0022] The soft limiting makes the swing more stable, different damping forces are generated during use, the use experience is increased, friction is not easy to generate, noise is low, and the decibel is low;

[0023] The user can use the fitness facility safely and reliably, with low maintenance and low noise. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The figure is a motion facility structure with the oil-free limiting structure of the present application.

[0025] Figure 2 The figure is a structure schematic view of the oil-free limiting structure of the present application.

[0026] Figure 3 The figure is a bending piece structure schematic view of the present application.

[0027] Figure 4 The figure is a bending piece and round bar installation position view.

[0028] Figure 5 The figure is a limiting block installation position view.

[0029] Figure 6 The installation position diagram of the limiting clamp.

[0030] Figure 7 It is the structural diagram of the inner square shaft sleeve, the outer square shaft sleeve and the rubber strip, wherein the rubber strip is in the form after being stressed and extruded.

[0031] The figure label is explained as follows:

[0032] 1, inner square shaft sleeve; 2, outer square shaft sleeve; 3, rubber strip; 4, bending piece; 5, round bar; 6, limiting block; 601, positioning hole; 602, limiting clamping groove; 7, sleeve; 8, hanger; 9, end cover; 10, gasket; 11, bolt; 12, anti-theft cap; 13, threaded hole; 14, seat arm assembly; 15, limiting clamp; 1501, limiting protruding piece. Specific implementation

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Please refer to Figures 1-7 An oil-free limiting structure, comprising a sleeve 7, an outer square shaft sleeve 2, an inner square shaft sleeve 1 and a rubber strip 3, the outer wall of the sleeve 7 is fixedly connected to the hanger 8 of the instrument;

[0035] In the above structure, the outer square shaft sleeve 2 is limitingly installed in the sleeve 7 and fixedly connected to the sleeve 7 in the circumferential direction, that is, the outer square shaft sleeve 2 and the sleeve 7 cannot rotate relative to each other;

[0036] The limiting installation of the outer square shaft sleeve 2 can directly weld it in the sleeve 7, or can be achieved through a certain limiting structure; in the present solution, a limiting piece can be welded on the sleeve 7, such as a square cylinder piece, the outer square shaft sleeve 2 is sleeved in the square cylinder piece; in the present embodiment, it is achieved by welding a set of bending pieces 4, the bending pieces 4 include bending piece one and bending piece two, the bending parts of the bending piece one and the bending piece two are combined and matched with the shape of the outer surface of the outer square shaft sleeve 2.

[0037] The inner square shaft sleeve 1 is installed in the outer square shaft sleeve 2, and the rubber strip 3 is installed in the gap between the inner square shaft sleeve 1 and the outer square shaft sleeve 2; when the inner square shaft sleeve 1 rotates relative to the outer square shaft sleeve 2, the rubber strip 3 is extruded to generate damping, soft limiting, low noise, low decibel, square shaft sleeve, four square clamping, not easy to produce friction, and also prevent the harsh sound generated by the friction between metals.

[0038] When the rubber strip 3 is not pressed by the rotation of the inner shaft sleeve 1, that is, in the initial state, the pre-set angle between the inner shaft sleeve 1 and the outer shaft sleeve 2 is 30 degrees, and at this pre-set angle, the space between the inner wall of the inner shaft sleeve 1 and the outer shaft sleeve 2 is divided into four identical triangular prisms, and four rubber strips 3 are filled in the four triangular prism spaces, and the size of the rubber strip 3 is adapted to the size of the triangular prism space.

[0039] The inner shaft sleeve 1 and the sleeve 7 are connected by a limiting component for limiting the maximum rotation angle between the inner shaft sleeve 1 and the sleeve 7.

[0040] The limiting component described above includes a round bar 5, a limiting block 6, and a limiting clamping piece 15, wherein the round bar 5 is a short circular metal bar, and the round bar 5 is welded to the inner wall of the sleeve 7 near the end portion, and in the embodiment, four round bars 5 are provided, two on each end portion of the inner wall of the sleeve.

[0041] The limiting block 6 is provided with two limiting holes 601, which are generally made of POM material and are installed at the end portion of the sleeve 7, and the limiting block 6 is provided with a limiting clamping groove 602, which is an arc-shaped groove with an arc of π / 6.

[0042] The limiting clamping piece 15 is generally made of stainless steel, and the limiting clamping piece 15 has a limiting protruding piece 1501 that cooperates with the limiting clamping groove 602, and the limiting clamping piece 15 has a square through hole that cooperates with the inner shaft sleeve 1, and the end portion of the inner shaft sleeve 1 passes through the square through hole, and when the inner shaft sleeve 1 rotates, it drives the limiting clamping piece 15 to rotate, so that the movement track of the limiting protruding piece 1501 is in the form of a circular arc, and the limiting protruding piece 1501 can move within the range of the limiting clamping groove 602.

[0043] In the embodiment, two limiting protruding pieces 1501 are provided on each limiting clamping piece 15, and the two limiting protruding pieces 1501 are oppositely arranged, and two corresponding limiting clamping grooves 602 are provided on each limiting block 6.

[0044] The seat arm assembly 14 is a swing piece, and the upper end of the seat arm assembly 14 extends upward on both sides, and a square through hole is provided on the upwardly extending portion, and the end portion of the inner shaft sleeve 1 passes through the square through hole, so that the inner shaft sleeve 1 can directly drive the seat arm assembly 14 to rotate, and an end cover 9, a gasket 10, a bolt 11 and an anti-theft cap 12 are installed on the end portion of the inner shaft sleeve 1.

[0045] The end portion of the inner shaft sleeve 1 is provided with a threaded hole 13 that cooperates with the bolt 11.

[0046] When installing, the limiting blocks 6 are installed at both ends, then the limiting clamping pieces 15 are installed, finally the seat arm assembly 14 is installed, then the end covers 9 made of POM are installed at both ends, the gaskets 10 are padded, the bolts 11 are locked, and the anti-theft caps 12 are added.

[0047] In the initial state when the rubber strip 3 is not pressed by the rotation of the inner shaft sleeve 1, the limiting convex piece 1501 is located at the middle position of the arc-shaped limiting clamping groove 602, when the inner shaft sleeve 1 rotates clockwise or counterclockwise, the limiting convex piece 1501 is driven to rotate clockwise or counterclockwise in the limiting clamping groove 602, and the rubber strip 3 is pressed to realize soft limiting.

[0048] The limiting structure of the present application adopts oil-free design, and can be used without oil supply, thereby reducing the maintenance frequency; and in the face of various use environments, it guarantees normal operation under harsh conditions of high temperature and low temperature;

[0049] The bearing structure rubber strip is pressed in, the sealing is firm, and the waterproof and dustproof are reliable;

[0050] The swing angle is limited by the clamping groove in the structure, the force is increased when 0-30°, the damping force is output, and the swing is more stable;

[0051] Soft limiting, low noise, and low decibel;

[0052] The square shaft sleeve is four-square clamped, friction is not easy to be generated, and the harsh sound generated by friction between metals is also prevented;

[0053] The limiting blocks made of stainless steel and POM are wear-resistant and increase toughness;

[0054] The safety, reliability, low maintenance, low noise and other functions are realized when the user uses the fitness facility.

[0055] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An oil-free limiting structure, characterized in that, include: Sleeve (7) is used to fix the connection of the hanger (8); The outer square bushing (2) is installed inside the sleeve (7) and is fixed relative to the sleeve (7) in the circumferential direction; An inner square bushing (1) is installed inside an outer square bushing (2). A rubber strip (3) is installed in the gap between the inner square bushing (1) and the outer square bushing (2). When the inner square bushing (1) rotates relative to the outer square bushing (2), the rubber strip (3) is squeezed and generates damping. The inner square bushing (1) and the sleeve (7) are connected by a limiting component to limit the maximum rotation angle between the inner square bushing (1) and the sleeve (7); the limiting component includes: A round bar (5) is fixedly connected to the inner wall of the sleeve (7) near the end; A limiting block (6) is installed at the end of the sleeve (7). The limiting block (6) is provided with a positioning hole (601). The round bar (5) is limited in the positioning hole (601). The limiting block (6) is provided with a limiting groove (602). The limiting card (15) has a limiting protrusion (1501) that cooperates with the limiting slot (602). The limiting card (15) has a square through hole that cooperates with the inner square bushing (1). The end of the inner square bushing (1) passes through the square through hole. The limiting slot (602) is an arc-shaped groove.

2. The oil-free limiting structure according to claim 1, characterized in that, When the rubber strip (3) is not subjected to rotational compression by the inner square bushing (1), the preset included angle between the inner square bushing (1) and the outer square bushing (2) is 45 degrees.

3. The oil-free limiting structure according to claim 2, characterized in that, There are four rubber strips (3), each with a triangular cross-section.

4. The oil-free limiting structure according to claim 1, characterized in that, A bending member (4) is fixedly connected inside the sleeve (7), and the bent part of the bending member (4) matches the shape of the outer surface of the outer square bushing (2).

5. The oil-free limiting structure according to claim 4, characterized in that, Includes a seat arm assembly (14), the upper end of which extends upward on both sides, and a square through hole is provided on the upwardly extended part. The end of the inner square bushing (1) passes through the square through hole, and an end cap (9), a gasket (10), a bolt (11) and an anti-theft cap (12) are installed at the end of the inner square bushing (1).

6. The oil-free limiting structure according to claim 5, characterized in that, The end of the inner square bushing (1) is provided with a threaded hole (13) that mates with the bolt (11).

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