Elliptical trainer with adjustable stride length

Abstract

An elliptical trainer with adjustable stride length, characterized by the fact that it includes: a machine frame; a crank which is rotatably arranged on the left and right sides of the rear end of the machine frame; Each a rocker arm, rotatably arranged on the left and right sides of the front end of the machine frame; an adjustable tube that extends longitudinally from front to back and is articulated to the rocker arm, thereby forming a first pivot point; a pedal tube extending longitudinally from front to back, with one end connected to the adjustment tube and the other end pivotally connected to the crank, a second pivot point is formed, with a footboard that can be moved along its longitudinal direction on the tread tube; a connecting rod located below the adjustment tube, with one end pivotally connected to the rocker lever and the other end to the footboard; wherein a stride length adjustment and locking structure is provided at the connection between the adjustment tube and the pedal tube, which serves to change the distance between the first and the second joint point in order to enable a stride length adjustment.

Description

Field of invention

[0001] The present utility model belongs to the technical field of elliptical trainers and relates in particular to an elliptical trainer with adjustable stride length. State of the art

[0002] To improve their physical fitness, many people choose to use an elliptical trainer for their workouts. However, with conventional elliptical trainers, the stride length is usually fixed, resulting in a one-sided movement pattern that cannot be adapted to the training needs of different users. This limitation leads to monotonous training movements that do not meet the demands of individualized training and diverse exercise patterns. Therefore, there is a need to develop an elliptical trainer with a variable movement pattern, where the stride length can be adjusted to change the movement pattern, enabling more varied exercises and significantly improving the practicality and training effectiveness of the elliptical trainer. Object of the invention

[0003] To eliminate the disadvantages inherent in the existing technology, an elliptical trainer with adjustable stride length is provided, where the stride length of the elliptical trainer is adjustable.

[0004] The utility model is implemented through the following technical solution: An elliptical trainer with adjustable stride length comprises: a machine frame; a crank which is rotatably arranged on the left and right sides of the rear end of the machine frame; Each a rocker arm, rotatably arranged on the left and right sides of the front end of the machine frame; an adjustable tube that extends longitudinally from front to back and is articulated to the rocker arm, thereby forming a first pivot point; a pedal tube that also extends longitudinally from front to back, with one end connected to the adjustment tube and the other end articulated to the crank, which creates a second pivot point; a footboard is arranged on the tread tube, which can be moved along its longitudinal direction; a connecting rod located below the adjustment tube, with one end pivotally connected to the rocker lever and the other end to the footboard; wherein a stride length adjustment and locking structure is provided at the connection between the adjustment tube and the pedal tube, which serves to change the distance between the first and the second joint point in order to enable a stride length adjustment.

[0005] In practical use, the user can adjust the stride length by changing the distance between the first and second pivot points using the stride length adjustment and locking mechanism, thereby adapting the stride length of the elliptical trainer to the needs of different users. This change in distance can be achieved either by altering the angle between the adjustment tube and the pedal tube or by changing the overall length between the adjustment tube and the pedal tube.

[0006] Preferably, the adjustment tube and the pedal tube are connected to each other by a pivot, so that the distance between the first pivot point and the second pivot point can be changed by their relative rotation. The stride length adjustment and locking mechanism serves to lock the adjustment tube and the pedal tube in place after the relative rotation has taken place.

[0007] By adjusting the angle between the adjustment tube and the pedal tube, the distance between the first and second pivot points can be changed to achieve the desired stride length adjustment. The stride length adjustment and locking mechanism can be any known structure that, after relative rotation between the adjustment tube and the pedal tube, can lock their angle to each other.

[0008] The preferred step length adjustment and locking mechanism includes: several insertion holes arranged in an arc shape on one of the two parts, the adjustment tube or the pedal tube; a mounting hole provided on the other part of the adjustment tube or the pedal tube; a locking pin which, after passing through the mounting hole and one of the insertion holes, locks the angle between the adjustment tube and the pedal tube in order to fix the stride length adjustment.

[0009] This arrangement achieves a simple structure where the user only needs to insert or remove the locking pin to lock or unlock the adjustment tube and the pedal tube.

[0010] Preferably, the step length adjustment and locking structure is designed in such a way that it can adjust the distance between the adjustment tube and the pedal tube, thereby changing the distance between the first pivot point and the second pivot point.

[0011] By changing the distance between the adjustment tube and the pedal tube, the distance between the first joint point and the second joint point is changed in order to achieve the desired stride length adjustment.

[0012] The preferred step length adjustment and locking mechanism includes: a first connecting element that is attached to the pedal tube; a second connecting element that is attached to the adjusting tube; a rotary sleeve, both ends of which are rotatably connected to the first connecting element and the second connecting element; wherein at least one of the connecting elements is provided with an external thread structure or internal thread structure, and the rotary sleeve is provided with a matching thread structure; where, when the rotating sleeve is turned, the distance between the adjustment tube and the pedal tube is increased or decreased, thereby changing the distance between the first pivot point and the second pivot point.

[0013] This design allows the user to easily change the distance between the adjustment tube and the pedal tube by simply turning the rotating sleeve, thereby adjusting the distance between the first and second pivot points to achieve the desired locking position for the stride length adjustment on the elliptical trainer. This solution is easy to use.

[0014] Preferably, the first connecting element and the second connecting element have oppositely extending external thread structures, and the rotary sleeve is screwed onto the outside between the first connecting element and the second connecting element with a thread; When the rotating sleeve rotates, the adjustment tube and the foot tube move closer together or further away from each other to change the distance between them.

[0015] This design allows the step length to be adjusted more quickly.

[0016] Preferably, a longitudinally extending rail is provided on the tread tube, and the footboard is equipped with a roller running in the rail.

[0017] This arrangement allows the footboard to slide along the tread tube. Preferably, the rail is open at the sides.

[0018] The laterally open design of the rail prevents vertical play of the roller, so that the footboard cannot slip out of the rail.

[0019] Preferably the end of the crank is rotatably connected to a sleeve; wherein the bottom of the pedal tube is firmly connected to the sleeve; or wherein the bottom of the tread tube is provided with a downwardly open groove which is supported on the sleeve.

[0020] Since adjusting the stride length of the elliptical trainer can result in large strides, the rail is designed to be longer. To prevent the sleeve from affecting the length of the rail, it is either attached directly to the bottom of the pedal tube or the pedal tube is provided with a groove that rests on the sleeve, thus supporting the pedal tube and creating the articulated connection between the pedal tube and the crank.

[0021] Preferably, the rocker arm comprises, from top to bottom, a handle rotatably coupled to each other, a handle transition tube and a rocker rod; wherein a first rotary rod and a second rotary rod are provided, extending laterally and rotatably attached to the machine frame. that one end of the handle is gripped by the user and the other end is firmly connected to the first rotating rod; that the handle transition tube comprises a first transition tube, a second transition tube and a third transition tube, wherein one end of the first transition tube is rigidly connected to the first rotary rod and the other end is pivotally connected to the second transition tube, one end of the third transition tube is pivotally connected to the second transition tube and the other end is rigidly connected to the second rotary rod; and that one end of the rocker arm is rigidly connected to the second rotary rod, with the adjustment tube and the connecting rod each pivotally connected to the rocker arm. The rocker arm is divided into three parts, with the handle coupled to the rocker arm via the handle transition tube, and the handle transition tube itself having two pivot points. Compared to a conventional, continuous rocker arm, this optimizes the handle swivel range and improves human-machine interaction. Even with long strides, it prevents the handle swivel range from becoming too large, which could impair the user's experience.

[0022] Preferably, the first transition tube and the handle are arranged at a 90° angle to each other, as is the case with the third transition tube and the swing rod, which are arranged at a 90° angle to each other.

[0023] This arrangement allows for further optimization of the handle swivel range.

[0024] Compared to previous technology, the present invention offers the following advantages: 1. Large adjustable stride length range to meet different user requirements; 2. Compact machine frame enables large stride lengths and saves space; 3. Optimization of the handle swivel range through the handle transition tube, improving human-machine interaction and increasing user comfort. Brief description of the drawings Fig. Figure 1 is a schematic representation of the overall structure of the elliptical trainer according to embodiment 1; Fig. Figure 2 is an enlarged view of the groove on the pedal tube; Fig. Figure 3 is an enlarged view of the area between the pedal tube and the sleeve; Fig. Figure 4 is an enlarged view of the area between the pedal tube and the sleeve; Fig. 5 is an exploded view of the connection between the pedal tube and the adjustment tube; Fig. Figure 6 is a schematic representation of the overall structure of the elliptical trainer according to embodiment 2; Fig. 7 is an enlarged representation of the in Fig. 6 marked areas.

[0025] Reference symbols: 1. Machine frame; 11. First rotating rod; 12. Second rotating rod; 13. Sleeve; 2. Swing rod; 3. Tread tube; 31. Footboard; 32. Rail; 33. Roller; 34. Groove; 4. Connecting rod; 5. Adjusting tube; 6. Handle-transition tube; 61. First transition tube; 62. Second transition tube; 63. Third transition tube; 7. Handle; 81. Locking pin; 82. Insertion hole; 91. First connecting element; 92. Second connecting element; 93. Rotating sleeve. Description of preferred embodiments

[0026] The present utility model is described in more detail below with reference to the drawings and specific examples of its implementation.

[0027] As in Fig. Figure 1 shows that the present embodiment discloses an elliptical trainer with adjustable stride length, comprising a machine frame 1. Cranks (not shown in the drawing) are rotatably mounted on the left and right sides of the rear end of the machine frame 1, their ends being provided with a sleeve 13. Rocker arms are arranged on the left and right sides of the front end of the machine frame 1, each comprising, from top to bottom, a handle 7, a handle transition tube 6, and a rocker rod 2 in a transmitting connection. At the front end of the machine frame 1, a first rotary rod 11 and a second rotary rod 12 are laterally mounted to the frame on the left and right sides, respectively, and are non-rotatably attached to the frame.

[0028] The upper end of the handle 7 serves as a grip for the user, while the lower end is fixed to the first pivot rod 11. The handle transition tube 6 comprises the first transition tube 61, the second transition tube 62, and the third transition tube 63. One end of the first transition tube 61 is fixed to the first pivot rod 11, and the other end is pivotally connected to the second transition tube 62; the first transition tube 61 forms a 90° angle with the handle 7. One end of the third transition tube 63 is pivotally connected to the second transition tube 62, and the other end is fixed to the second pivot rod 12. The upper end of the swing rod 2 is fixed to the second pivot rod 12, and the third transition tube 63 and the swing rod 2 form a 90° angle.

[0029] As in Fig. 1 to Fig.As shown in Figure 5, the sleeve 13 supports the pedal tube 3, which extends longitudinally from front to rear. Rails 32 with lateral openings are arranged longitudinally on both sides of the pedal tube 3. A footboard 31 for the user is attached to the upper end of the pedal tube 3. A roller 33 is arranged at the lower end of the footboard 31, which slides in the rail 32, so that the footboard 31 moves back and forth along the rail 32 during use. A downwardly open, arc-shaped groove 34 is provided at the lower end of the pedal tube 3, in which the sleeve 13 is arranged and fixed by welding to the groove 34. This creates the articulated connection between the pedal tube 3 and the crank, forming the second pivot point B.

[0030] Or in other embodiments, no welded connection is provided between the sleeve 13 and the groove 34, with the pedal tube 3 resting directly on the sleeve 13.

[0031] The pedal tube 3 is connected to the swing rod 2 via the adjustment tube 5. The adjustment tube 5 is pivotally connected to the swing rod 2 at its center, forming the first pivot point A. A stride length adjustment and locking mechanism is arranged between the adjustment tube 5 and the pedal tube 3. The pivotal connection between the adjustment tube 5 and the pedal tube 3 allows the angle between them to be changed, thereby altering the distance between the first pivot point A and the second pivot point B and thus adjusting the stride length. The stride length adjustment and locking mechanism includes three insertion holes 82 arranged on the adjustment tube 5, distributed along an arc. Mounting holes (not shown in the drawing) are provided at the end of the pedal tube 3.A locking pin 81 is inserted through a mounting hole and an insertion hole 82, thereby locking the angle between the adjustment tube 5 and the foot tube 3 and fixing the step length.

[0032] At the lower end of the swing rod 2, a connecting rod 4 is attached in a hinged manner, the other end of which is hingedly connected to the footboard 31. Example 2

[0033] The difference between this embodiment 2 and embodiment 1 is that the stride length adjustment and locking mechanism in embodiment 2 comprises a first connecting element 91, which is fixed to one end of the pedal tube 3, a second connecting element 92, which is fixed to one end of the adjustment tube 5, and a swivel sleeve 93, which is arranged between the first connecting element 91 and the second connecting element 92. The adjustment tube 5 is arranged coaxially with the pedal tube 3. The first connecting element 91 and the second connecting element 92 are provided with opposing external threads, and the swivel sleeve 93 is provided with a thread that engages with the first connecting element 91 and the second connecting element 92 and is located on their outer surface.When the rotating sleeve 93 is turned, the adjustment tube 5 and the pedal tube 3 move closer together or further apart, thus changing the distance between them. This changes the distance between the first pivot point A and the second pivot point B, thereby completing the stride length adjustment.

Claims

[1] An elliptical trainer with adjustable stride length, characterized by that it includes: a machine frame; a crank which is rotatably arranged on the left and right sides of the rear end of the machine frame; Each a rocker arm, rotatably arranged on the left and right sides of the front end of the machine frame; an adjustable tube that extends longitudinally from front to back and is articulated to the rocker arm, thereby forming a first pivot point; a pedal tube extending longitudinally from front to back, with one end connected to the adjustment tube and the other end pivotally connected to the crank, a second pivot point is formed, with a footboard that can be moved along its longitudinal direction on the tread tube; a connecting rod located below the adjustment tube, with one end pivotally connected to the rocker lever and the other end to the footboard; wherein a stride length adjustment and locking structure is provided at the connection between the adjustment tube and the pedal tube, which serves to change the distance between the first and the second joint point in order to enable a stride length adjustment. [2] The elliptical trainer with adjustable stride length according to claim 1, characterized by , that the adjustment tube and the pedal tube are articulated together and that the distance between the first joint point and the second joint point is changed by a relative rotation to each other, whereby the step length adjustment and locking structure serves to lock the angle between the adjustment tube and the pedal tube after the relative rotation. [3] The elliptical trainer with adjustable stride length according to claim 2, characterized by, that the step length adjustment and locking mechanism includes: several insertion holes arranged in an arc shape on one of the two parts, the adjustment tube or the pedal tube; a mounting hole provided on the other part of the adjustment tube or the pedal tube; a locking pin which, after passing through the mounting hole and one of the insertion holes, locks the angle between the adjustment tube and the pedal tube in order to fix the stride length adjustment. [4] The elliptical trainer with adjustable stride length according to claim 1, characterized by , that the step length adjustment and locking structure is designed to change the distance between the adjustment tube and the pedal tube, thereby changing the distance between the first pivot point and the second pivot point. [5] The elliptical trainer with adjustable stride length according to claim 4, characterized by, that the step length adjustment and locking mechanism includes: a first connecting element that is attached to the pedal tube; a second connecting element that is attached to the adjusting tube; a rotary sleeve, both ends of which are rotatably connected to the first connecting element and the second connecting element; wherein at least one of the connecting elements is provided with an external thread structure or internal thread structure, and the rotary sleeve is provided with a matching thread structure; where, when the rotating sleeve is turned, the distance between the adjustment tube and the pedal tube is increased or decreased, thereby changing the distance between the first pivot point and the second pivot point. [6] The elliptical trainer with adjustable stride length according to claim 5, characterized by, that the first connecting element and the second connecting element are each provided with an oppositely directed external thread structure, wherein the rotary sleeve is arranged with a thread on the outside of the first connecting element and the second connecting element, when the rotary sleeve rotates, the adjusting tube and the foot tube approach or move away from each other to change the distance between the two. [7] The elliptical trainer with adjustable stride length according to any one of claims 1 to 6, characterized by that a rail extending along the longitudinal direction of the tread tube is provided and the footboard is equipped with rollers that are guided in the rail. [8] The elliptical trainer with adjustable stride length according to claim 7, characterized by that the rail is open at the side. [9] The elliptical trainer with adjustable stride length according to any one of claims 1 to 6, characterized by that the end of the crank is rotatably connected to a sleeve; wherein the bottom of the pedal tube is fixedly connected to the sleeve; or wherein the bottom of the pedal tube is provided with a downwardly open groove which is supported on the sleeve. [10] The elliptical trainer with adjustable stride length according to any one of claims 1 to 6, characterized by , that the rocker arm comprises, from top to bottom, a handle connected to each other in drive connection, a handle transition tube and a rocker rod; that a first rotary rod and a second rotary rod are provided, extending laterally and rotatably attached to the machine frame; that one end of the handle is gripped by the user and the other end is firmly connected to the first rotating rod; that the handle transition tube comprises a first transition tube, a second transition tube and a third transition tube, wherein one end of the first transition tube is rigidly connected to the first rotary rod and the other end is pivotally connected to the second transition tube, one end of the third transition tube is pivotally connected to the second transition tube and the other end is rigidly connected to the second rotary rod; and that one end of the rocker arm is firmly connected to the second rotary rod, with the adjusting tube and the connecting rod each being articulated to the rocker arm. [11] The elliptical trainer with adjustable stride length according to claim 10, characterized by , that the first transition tube and the handle are arranged at an angle of 90° to each other, and the third transition tube and the swing rod are also arranged at an angle of 90° to each other.

Images