Rotary connecting structure of fitness equipment and outdoor treadmill

Abstract

The utility model relates to the technical field of fitness equipment, and particularly discloses a rotary connecting structure of fitness equipment and an outdoor treadmill, the rotary connecting structure comprises an EPP buffer block, a limiting shaft and a central shaft fixedly arranged on a main frame, and a shaft sleeve is rotatably arranged outside the central shaft through a bearing; the shaft sleeve or the main frame is provided with a buffer block installation groove located in the radial periphery of the center shaft, the EPP buffer blocks are installed in the buffer block installation groove in a matched mode, the shape of the EPP buffer blocks is the same as that of the corresponding buffer block installation groove, through holes are formed in the EPP buffer blocks, and the limiting shaft is parallel to the center shaft and matched with the through holes in the EPP buffer blocks. The EPP buffer block has the functions of buffering, shock absorption, energy absorption, impact resistance, shock absorption and noise reduction and has higher mechanical strength and longer service life, the EPP buffer block and the limiting shaft are always kept in an attached state through a specific structure, movement is smoother, a sporter does not have sudden pause feeling, and the product experience feeling is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fitness equipment, in particular to a rotating connection structure of fitness equipment and an outdoor stepper. Background Art

[0002] In public places such as parks and communities, some outdoor fitness equipment for people to exercise can often be seen, such as sit-up machines, sit-pull machines, sit-pedal machines, rowing machines, treadmills, horse riding machines and steppers, etc. The rotating parts in these outdoor fitness equipment mostly use rotating shafts and bushings.

[0003] For example, a Chinese patent document (CN202409974U) discloses a swing leg rotation limit mechanism for a walking machine, including a column, a crossbar and a swing leg, wherein the limit sleeve is located at the top of the swing leg, the sleeve is fixed on a connecting plate to form an integral body, the connecting plate is fixed on the column, the sleeve and the limit sleeve are coaxially arranged and are inserted on the same rotating shaft, wherein the sleeve is characterized in that a C-shaped groove is provided on one end face of the sleeve, a C-shaped protrusion matching the C-shaped groove is provided on the corresponding end face of the limit sleeve, and polyurethane cushion pads are respectively provided at both ends of the C-shaped groove of the sleeve to reduce the rigid collision between the limit bearing sleeve and the rotating shaft. However, the polyurethane cushion material has poor stability, and there is a phenomenon of cracking and loud noise after a period of use, resulting in a buffer failure phenomenon, poor user experience, and cannot meet the market's better experience and needs. Utility Model Content

[0004] The purpose of the utility model is to provide a rotating connection structure of fitness equipment and an outdoor stepper, which makes the exercise smoother, does not make the exerciser feel sudden setbacks, and increases the product experience.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The rotating connection structure of the fitness equipment is arranged between the sleeve and the main frame, and the rotating connection structure includes an EPP buffer block, a limiting shaft and a central shaft fixed on the main frame. The sleeve is rotatably arranged outside the central shaft through a bearing, and the sleeve or the main frame has a buffer block mounting groove located on the radial periphery of the central shaft. The EPP buffer block is adapted to be installed in the buffer block mounting groove and the shape of the EPP buffer block is the same as the shape of the corresponding buffer block mounting groove. A through hole is provided on the EPP buffer block, and the limiting shaft is arranged parallel to the central axis and cooperates with the through hole on the EPP buffer block.

[0007] Preferably, there are two bearings, and one side of the bearing is provided with a shaft stopper for limiting the axial movement of the bearing.

[0008] Preferably, a thin slit communicating with the via hole is formed on the EPP buffer block at the via hole.

[0009] Preferably, the number of the limit shafts matches the number of the buffer block mounting grooves.

[0010] Preferably, a threaded hole is provided on the end of the central shaft away from the main frame, and a large end cover is provided on the side of the sleeve away from the main frame. An end cover hole is provided on the large end cover at the position corresponding to the threaded hole, and a bolt is installed in the threaded hole. The bolt passes through the end cover hole and fixes the large end cover to fit the central shaft.

[0011] Preferably, a retaining ring is provided on the central shaft sleeve between the large end cover and the bearing, the central shaft hole on the sleeve for passing the central shaft has a stepped surface, and the bearing located on the side of the sleeve away from the main frame is restricted in axial movement by the retaining ring and the stepped surface.

[0012] Preferably, a plane washer and a spring washer are sandwiched between the bolt and the large end cover, and the spring washer is between the plane washer and the bolt head.

[0013] Preferably, the rotating connection structure also includes a small end cover, and the large end cover is further provided with a countersunk hole on the side of the end cover hole away from the central axis, the aperture of the countersunk hole is larger than the aperture of the end cover hole, the bolt head is located in the countersunk hole, the inner wall of the countersunk hole has a buckle groove, and the small end cover is arranged with at least two elastic clamps in the same circumferential direction, and the small end cover is clamped in the countersunk hole through the elastic clamps.

[0014] Preferably, the central shaft and the limiting shaft are both fixedly mounted on the main frame, and the buffer block mounting groove and the EPP buffer block are both arranged in the shaft sleeve.

[0015] The utility model also provides an outdoor stepper, comprising a column, a handrail, a main frame and two pedals, wherein the handrail is installed above the column and on the same side of the main frame, the main frame is on one side of the column, and the two pedals are respectively installed on both sides of the main frame using the above-mentioned rotating connection structure, and the pedals are connected to the shaft sleeve as a whole.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The rotary connection structure of the utility model comprises an EPP buffer block and a limit shaft. The EPP buffer block is adapted to be installed in the buffer block installation groove and the shape of the EPP buffer block is the same as the shape of the corresponding buffer block installation groove. The limit shaft cooperates with the through hole on the EPP buffer block. The EPP buffer block has the functions of buffering, shock absorption, energy absorption, impact resistance, shock absorption and noise reduction, higher mechanical strength and longer service life. In addition, the unique structure ensures that the EPP buffer block and the limit shaft always keep in a fit state, making the movement smoother, without making the athlete feel sudden setbacks, and increasing the product experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the structure of the outdoor stepper of the utility model.

[0019] Figure 2 This is a cross-sectional view of the installation state of the shaft sleeve and the main frame of the utility model.

[0020] Figure 3 for Figure 2 A is a partial enlarged view shown in FIG.

[0021] Figure 4 for Figure 3 B is a partial enlarged view shown in FIG.

[0022] Figure 5 This is an exploded view of the rotary connection structure of the utility model.

[0023] Figure 6 This is a schematic diagram of the structure of two EPP buffer blocks of the utility model.

[0024] Figure 7 It is a schematic diagram of the small end cover structure of the utility model.

[0025] Markings in the figure: 10, column; 20, handrail; 30, pedal; 40, main frame; 41, center axis; 42, limit axis; 43, EPP buffer block; 431, through hole; 432, slit; 50, bushing; 51, deep groove ball bearing; 52, retaining ring; 53, bolt; 54, flat washer; 55, spring washer; 56, large end cover; 57, small end cover; 58, elastic block; 59, buffer block mounting groove. DETAILED DESCRIPTION

[0026] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0027] Example 1

[0028] like Figure 1-Figure 5 As shown, this embodiment provides an outdoor stepper, including a column 10, a handrail 20, a main frame 40 and two pedals 30. There are two pedals 30 and they are respectively connected to the shaft sleeves 50 as a whole. The two shaft sleeves 50 are respectively installed on the left and right sides of the main frame 40 through a rotating connection structure. The main frame 40 is on one side of the column 10. The handrail 20 is installed on the top of the column 10 and is on the same side as the main frame 40. A person steps on the pedal 30 and holds the handrail 20, and the athlete steps up and down.

[0029] The rotating connection structure is arranged between the sleeve 50 and the main frame 40. The rotating connection structure enables the rotating mechanism connected to the sleeve 50 to rotate and swing around the main frame 40. The rotating mechanism in this embodiment is the pedal 30 of the outdoor stepper. The pedal 30 is connected to the sleeve 50 as a whole, and the pedal 30 swings up and down on the main frame 40 along with the sleeve 50.

[0030] In this embodiment, the rotating connection structure includes an EPP buffer block 43, a limit shaft 42 and a center shaft 41. The sleeve 50 includes an inner sleeve, an outer sleeve and connecting ribs connecting the inner sleeve and the outer sleeve. The inner sleeve is formed with a center shaft hole for the center shaft 41 to pass coaxially. The center shaft 41 is fixed on the main frame 40 and has a positioning shoulder. The center shaft hole is a stepped shaft hole structure with large ends and a small middle, and stepped surfaces are formed at the left and right ends respectively.

[0031] The center shaft 41 protrudes from the main frame 40, and the center shaft 41 coaxially penetrates into the center shaft hole. The sleeve 50 is rotatably arranged outside the center shaft 41 through two deep groove ball bearings 51. The deep groove ball bearing 51 close to the main frame 40 is restricted in axial movement by the positioning shoulder on the center shaft 41 and the stepped surface on the center shaft hole. One side of the deep groove ball bearing 51 away from the main frame 40 abuts against the other stepped surface of the center shaft hole and the other side is blocked by the retaining ring 52 mounted on the center shaft 41, that is, the deep groove ball bearing 51 away from the main frame 40 is restricted in axial movement by the retaining ring 52 and the stepped surface.

[0032] In this embodiment, in order to simultaneously fix the retaining ring 52 and seal the side of the sleeve 50 away from the main frame 40, a large end cover 56, a small end cover 57, a bolt 53, a plane washer 54 and a spring washer 55 are provided on the side of the sleeve 50 away from the main frame 40. Among them, a threaded hole is provided on the end of the central shaft 41 away from the main frame 40, and an end cover hole and a countersunk hole are provided at the position of the large end cover 56 corresponding to the threaded hole. The hole diameter of the countersunk hole is larger than the hole diameter of the end cover hole and the end cover hole is close to the central shaft 41. The bolt 53 passes through the end cover hole and is threadedly adapted and installed in the threaded hole. A plane washer 54 and a spring washer 55 are also sandwiched between the bolt 53 and the large end cover 56. The spring washer 55 is between the plane washer 54 and the head of the bolt 53. The head of the bolt 53 is in the countersunk hole. The bolt 53 passes through the end cover hole and fixes the large end cover 56 to fit on the central shaft 41, and also fixes the position of the retaining ring 52.

[0033] The inner wall of the countersunk hole has a buckle groove, and the small end cover 57 is arranged with at least two elastic blocks 58 in the same circumferential direction. The small end cover 57 is engaged in the countersunk hole through the elastic blocks 58. Figure 7 shown.

[0034] In this embodiment, a buffer block installation groove 59 is formed between the inner sleeve and the outer sleeve and between two adjacent connecting ribs. The buffer block installation groove 59 is located at the radial periphery of the central axis hole. The limiting shaft 42 is also fixed on the main frame 40 and arranged parallel to the central axis 41. The number of the limiting shafts 42 matches the number of the buffer block installation grooves 59. There are two connecting ribs in this embodiment, and the number of the corresponding buffer block installation grooves 59 is two. The number of the EPP buffer blocks 43 is also two and they are respectively adapted to be installed in the buffer block installation grooves 59. The shape of the EPP buffer blocks 43 is the same as the shape of the corresponding buffer block installation grooves 59. Figure 6 As shown; in other examples, the connecting ribs may also be set to three and the number of buffer block mounting grooves 59 formed is 3.

[0035] The EPP buffer block 43 of this embodiment is provided with a through hole 431, and the limiting shaft 42 cooperates with the corresponding through hole 431 on the EPP buffer block 43, and the cooperation mode is a clearance cooperation of 0.5mm. In some other examples, the cooperation mode may also be an interference fit or a transition fit. The EPP buffer block 43 and the limiting shaft 42 are always kept in a fitting state, so that the movement is smoother, the athlete will not have a sudden sense of frustration, and the product experience is increased. The EPP buffer block 43, that is, the foamed polypropylene buffer block, has the functions of buffering, shock absorption, energy absorption, impact resistance, shock absorption and noise reduction, and has higher mechanical strength. After being squeezed by the limiting shaft 42, it will adaptively make compression deformation, and after the foot is relieved of force, it can use its excellent rebound performance to drive the pedal 30 back to its original position. In addition, in order to facilitate installation, a slit 432 connected to the through hole 431 can be further provided at the through hole 431 of the EPP buffer block 43, and the width of the slit 432 is preferably 0.5mm-1.5mm.

[0036] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. The rotating connection structure of the fitness equipment is arranged between the shaft sleeve and the main frame, and is characterized by: The rotating connection structure includes an EPP buffer block, a limiting shaft and a central shaft fixed on the main frame, the sleeve is rotatably arranged outside the central shaft through a bearing, the sleeve or the main frame has a buffer block mounting groove located on the radial periphery of the central shaft, the EPP buffer block is adapted to be installed in the buffer block mounting groove and the shape of the EPP buffer block is the same as the shape of the corresponding buffer block mounting groove, the EPP buffer block is provided with a through hole, the limiting shaft is arranged parallel to the central shaft and cooperates with the through hole on the EPP buffer block.

2. The rotating connection structure of fitness equipment according to claim 1, characterized in that: There are two bearings, and one side of the bearing is provided with a shaft stopper for limiting the axial movement of the bearing.

3. The rotating connection structure of fitness equipment according to claim 1, characterized in that: A fine slit communicating with the via hole is also provided on the EPP buffer block at the via hole.

4. The rotating connection structure of fitness equipment according to claim 1, characterized in that: The number of the limit shafts matches the number of the buffer block installation slots.

5. The rotating connection structure of fitness equipment according to claim 1, characterized in that: A threaded hole is provided on the end of the central shaft away from the main frame, and a large end cover is provided on the side of the sleeve away from the main frame. An end cover hole is provided on the large end cover at the position corresponding to the threaded hole, and a bolt is installed in the threaded hole. The bolt passes through the end cover hole and fixes the large end cover to fit the central shaft.

6. The rotating connection structure of fitness equipment according to claim 5, characterized in that: A retaining ring is disposed outside the central shaft between the large end cover and the bearing, and a central shaft hole on the sleeve for passing the central shaft has a stepped surface. The bearing located on the side of the sleeve away from the main frame is restricted in axial movement by the retaining ring and the stepped surface.

7. The rotating connection structure of fitness equipment according to claim 5, characterized in that: A plane washer and a spring washer are also sandwiched between the bolt and the large end cover, and the spring washer is between the plane washer and the bolt head.

8. The rotating connection structure of fitness equipment according to claim 5, characterized in that: The rotating connection structure also includes a small end cover, and the large end cover is further provided with a countersunk hole on the side of the end cover hole away from the central axis, the aperture of the countersunk hole is larger than the aperture of the end cover hole, the bolt head is located in the countersunk hole, the inner wall of the countersunk hole has a buckle groove, and the small end cover is arranged with at least two elastic clamping blocks in the same circumferential direction, and the small end cover is clamped in the countersunk hole through the elastic clamping blocks.

9. The rotating connection structure of fitness equipment according to claim 1, characterized in that: The central shaft and the limiting shaft are both fixedly mounted on the main frame, and the buffer block mounting groove and the EPP buffer block are both arranged in the shaft sleeve.

10. Outdoor stepper, characterized by: It includes a column, a handrail, a main frame and two pedals, the handrail is installed above the column and on the same side of the main frame, the main frame is on one side of the column, and the two pedals are respectively installed on both sides of the main frame using the rotating connection structure described in any one of claims 1 to 9, and the pedals are connected to the shaft sleeve as a whole.

Images