Linkage oil cylinder

Abstract

The utility model belongs to the technical field of fitness equipment, and particularly relates to a linkage oil cylinder which comprises a first oil cylinder and a second oil cylinder, the first oil cylinder and the second oil cylinder are connected through a connecting pipe, the connecting pipe is connected with a connecting base, and the connecting base is provided with a first flow guide hole, a second flow guide hole and a connecting groove. Hydraulic oil in the first oil cylinder and the second oil cylinder flows interactively through the connecting pipe, the first flow guide hole, the second flow guide hole and the connecting groove, an adjusting valve is arranged in the connecting groove, a flow guide groove with the cross section gradually reduced is formed in the adjusting valve, and the first flow guide hole and the second flow guide hole are communicated with the flow guide groove; the adjusting valve is controlled to move relatively in the connecting groove, so that the connecting position of the first flow guide hole and / or the second flow guide hole and the flow guide groove is changed, the minimum cross sectional area is changed when hydraulic oil flows through the flow guide groove, and the linkage oil cylinder is simple in structure, convenient to assemble and capable of adjusting damping conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of fitness equipment, and particularly relates to a linkage oil cylinder. Background Art

[0002] With the improvement of people's living standards, more and more people use fitness equipment for exercise. Some fitness equipment requires users to step on it reciprocally with both feet, so that users can perform exercises similar to cycling, climbing stairs or walking, such as a stepper.

[0003] In order to improve the exercise effect of the stepper conveniently, damping devices are provided on most of the steppers. For example, the adjustable stepper disclosed in Chinese utility model patent CN201420226091.6 includes a machine base, a hinge seat, left and right stepping rods, and left and right force damping oil cylinders. The hinge seat is fixed on the machine base, the left and right stepping rods are symmetrically hinged on both sides of the hinge seat, the left and right force damping oil cylinders are correspondingly hinged between the left and right stepping rods and the front part of the machine base, and left and right pedals are correspondingly fixed on the left and right stepping rods. A linkage mechanism is provided on the machine base, and the mechanism includes a fixed seat, an adjustment seat, a movable support rod, left and right spherical joint connecting rods, and an adjustment knob. The fixed seat is fixed on the machine base, the movable support rod is hinged on the adjustment seat, the adjustment seat is movably arranged on the adjustment groove of the fixed seat, an adjustment screw is fixed on the adjustment seat, the adjustment screw passes through the fixed seat and is connected with the adjustment knob, one ends of the left and right spherical joint connecting rods are correspondingly connected to both ends of the movable support rod, and the other ends of the left and right spherical joint connecting rods are correspondingly connected to the left and right stepping rods. This structure has the advantages of convenient adjustment, reliable operation and good fitness effect.

[0004] In the above structure, the resistance of the stepper is provided by the resistance during the flow of hydraulic oil in the damping oil cylinder, and the oil cylinder is driven to reset through the linkage mechanism. However, the linkage structure is relatively complex, inconvenient to assemble, and the damping of the damping oil cylinder cannot be adjusted, so that the stepper cannot be widely applicable to different users. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a linkage oil cylinder with a simple structure, convenient assembly and convenient adjustment of damping magnitude.

[0006] The purpose of the utility model is realized as follows:

[0007] A linkage oil cylinder includes a first oil cylinder and a second oil cylinder. The first oil cylinder and the second oil cylinder are connected by a connecting pipe. A connecting seat is connected to the connecting pipe. The connecting seat is provided with a first diversion hole, a second diversion hole and a connecting groove. The hydraulic oil in the first oil cylinder and the second oil cylinder realizes the interactive flow between the first oil cylinder and the second oil cylinder through the connecting pipe, the first diversion hole, the second diversion hole and the connecting groove. A regulating valve is movably arranged in the connecting groove. The regulating valve is provided with a diversion groove with a gradually decreasing cross-section. The first diversion hole and the second diversion hole are respectively communicated with the diversion groove. Control the relative movement of the regulating valve in the connecting groove, so as to change the connection position of the first diversion hole and / or the second diversion hole and the diversion groove, so that the minimum cross-sectional area of the hydraulic oil flowing through the diversion groove changes, and further control the flow rate of the hydraulic oil.

[0008] The present utility model is further arranged as: the regulating valve is rotatably arranged in the connecting groove. The first diversion hole and / or the second diversion hole are connected to the side wall of the connecting groove and are connected to the side surface of the diversion groove. The diversion groove is arranged in an arc shape on the outer periphery of the regulating valve, and the depth of the diversion groove gradually increases or decreases along the extending direction of the diversion groove. Control the relative rotation of the regulating valve in the connecting groove so that the first diversion hole and / or the second diversion hole are connected to different positions of the diversion groove.

[0009] The present utility model is further arranged as: a sealing ring is arranged on the regulating valve. The sealing ring is arranged on one side of the diversion groove away from the bottom of the connecting groove. The sealing ring penetrates through the connecting groove and seals the connecting groove.

[0010] The present utility model is further arranged as: a limiting wall is arranged on the regulating valve. A fastening piece is arranged on the connecting seat. The fastening piece abuts against the limiting wall and prevents the regulating valve from detaching from the connecting groove.

[0011] The present utility model is further arranged as: the connecting seat is detachably arranged on the first oil cylinder or the second oil cylinder, and a universal joint is arranged on the connecting seat.

[0012] The present utility model is further arranged as: connecting seats and mounting seats are respectively detachably arranged on the first oil cylinder and the second oil cylinder. A third diversion hole for connecting the second oil cylinder and the connecting pipe is arranged on the mounting seat, and a universal joint is arranged on the mounting seat.

[0013] The present utility model is further arranged as: both the first oil cylinder and the second oil cylinder include a cylinder body and a piston. The piston divides the inner cavity of the cylinder body into an oil storage cavity and a ventilation cavity. The hydraulic oil is stored in the oil storage cavity. An air exchange hole is arranged on the outer wall of the ventilation cavity. During the movement of the piston on the cylinder body, air enters and exits the ventilation cavity through the air exchange hole.

[0014] The utility model is further configured as follows: the ventilation hole is arranged on the side wall of the cylinder body, a guide seat is detachably arranged at the end of the cylinder body, the ventilation chamber is arranged between the guide seat and the piston, a push rod is arranged on the piston, a guide hole is arranged on the guide seat, and the push rod is slidably arranged in the guide hole.

[0015] The utility model is further configured as follows: the regulating valve includes a valve stem and a control member, the valve stem is provided with a positioning portion and a connecting portion, the control member is provided with a positioning hole adapted to the positioning portion, the connecting portion is detachably provided with a nut, the nut is tightly pressed against the control member and prevents the positioning portion from being separated from the positioning hole.

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

[0017] 1. In the utility model, the interactive flow of hydraulic oil in the first oil cylinder and the second oil cylinder is realized through the connecting seat and the connecting pipe. During use, the hydraulic oil will make the first oil cylinder and the second oil cylinder linked, and no additional mechanical structure is required to make the first oil cylinder and the second oil cylinder linked. The structure is simple and convenient for assembly and production. The regulating valve arranged on the connecting seat can adjust the minimum cross-sectional area when the hydraulic oil flows through the guide groove, thereby controlling the flow rate of the hydraulic oil, and then adjusting the adjustment damping size of the first oil cylinder and the second oil cylinder during use. The structure is simple, and the process is stepless adjustment, which is convenient for users to flexibly adjust and control, and convenient for fitness equipment to be suitable for different users.

[0018] 2. The rotatable regulating valve in the utility model is convenient for adjusting the connection between the first guide hole and / or the second guide hole and the guide groove at different positions, and is convenient for setting the minimum cross-sectional area when adjusting the hydraulic oil flowing through the guide groove, which can avoid the connection misalignment between the first guide hole and / or the second guide hole and the guide groove during the adjustment process; the structure seals the connection groove through a sealing ring to prevent the hydraulic oil from leaking from the connection groove, which is convenient for users; the fastener abuts against the limit wall and prevents the regulating valve from being detached from the connection groove, the structure is simple, and the assembly and disassembly of the regulating valve is convenient, which is convenient for the production and maintenance of the linkage oil cylinder.

[0019] 3. The setting of the universal connector in the utility model facilitates the flexible installation of the first oil cylinder or the second oil cylinder on the fitness equipment. The setting of the mounting seat and the third guide hole enables the first oil cylinder and the second oil cylinder to adopt the same structure, which is beneficial to reduce the types of parts of the linkage oil cylinder and facilitate the assembly and production of the linkage oil cylinder.

[0020] 4. The arrangement of the ventilation hole and the ventilation chamber in the utility model facilitates the flexible movement of the piston in the cylinder body, is convenient for users, and the manufacturer can control the size of the oil storage chamber and the ventilation chamber during assembly to control the maximum stroke of the first oil cylinder and the second oil cylinder as needed, which is convenient for the manufacturer to control the stroke of the linkage cylinder as needed; the arrangement of the guide seat is not only conducive to the stable sliding of the piston, but also can prevent the piston from detaching from the cylinder body, which is convenient for the production and processing of the first oil cylinder and the second oil cylinder.

[0021] 5. In the present utility model, the detachably arranged valve stem and control member facilitate the production and assembly of the regulating valve. The producer can adjust the valve stem as needed to make the regulating valve applicable to different linkage cylinders, which is conducive to reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of the present utility model;

[0023] Figure 2 is a sectional view of the present utility model;

[0024] Figure 3 is a partial sectional view of the present utility model;

[0025] Figure 4 is a sectional view of the first oil cylinder in the present utility model;

[0026] Figure 5 is a sectional view of the connecting seat in the present utility model;

[0027] Figure 6 is a sectional view of the mounting seat in the present utility model;

[0028] Figure 7 is a schematic structural view of the valve stem in the present utility model;

[0029] Figure 8 is a sectional view of the valve stem in the present utility model;

[0030] Figure 9 is a schematic structural view of the control member in the present utility model.

[0031] The meanings of the reference numerals in the drawings: 1 - first oil cylinder; 11 - cylinder block; 12 - piston; 13 - push rod; 14 - guide seat; 15 - universal joint; 111 - oil storage cavity; 112 - air exchange cavity; 113 - air exchange hole; 141 - limiting end; 142 - guide hole; 2 - connecting pipe; 3 - connecting seat; 31 - first diversion hole; 32 - second diversion hole;

[0032] 33 - connecting groove; 4 - mounting seat; 41 - third diversion hole; 5 - regulating valve; 51 - valve stem; 52 - control member; 53 - nut; 54 - sealing ring; 511 - diversion groove; 512 - annular groove; 513 - limiting wall; 514 - positioning portion; 515 - threaded portion; 521 - positioning hole; 522 - receiving groove; 6 - fastener; 7 - second oil cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0034] See Figures 1 to 9As shown, a linkage cylinder comprises a first cylinder 1 and a second cylinder 7, the first cylinder 1 and the second cylinder 7 are connected by a connecting pipe 2, the connecting pipe 2 is connected to a connecting seat 3, the connecting seat 3 is provided with a first guide hole 31, a second guide hole 32 and a connecting groove 33, the hydraulic oil in the first cylinder 1 and the second cylinder 7 is realized to alternately flow between the first cylinder 1 and the second cylinder 7 through the connecting pipe 2, the first guide hole 31, the second guide hole 32 and the connecting groove 33, a regulating valve 5 is movably arranged in the connecting groove 33, the regulating valve 5 is provided with a guide groove 511 with a gradually decreasing cross-section, the first guide hole 31 and the second guide hole 32 are respectively communicated with the guide groove 511, in this structure, the interactive flow of the hydraulic oil in the first cylinder 1 and the second cylinder 7 is realized by the connecting seat 3 and the connecting pipe 2, during use, the hydraulic oil will make the first cylinder 1 and the second cylinder 7 linked, no additional mechanical structure is required to make the first cylinder 1 and the second cylinder 7 linked, the structure is simple, and it is convenient to assemble and produce.

[0035] The control regulating valve 5 moves relative to each other in the connecting groove 33, thereby changing the connecting position of the first guide hole 31 and / or the second guide hole 32 with the guide groove 511, so that the minimum cross-sectional area of ​​the hydraulic oil when flowing through the guide groove 511 changes, thereby controlling the flow rate of the hydraulic oil. In this structure, the regulating valve 5 can adjust the minimum cross-sectional area of ​​the hydraulic oil when flowing through the guide groove 511, thereby controlling the flow rate of the hydraulic oil, and thereby adjusting the adjustment damping size of the first oil cylinder 1 and the second oil cylinder 7 during use. The structure is simple, and the adjustment process is stepless adjustment, which is convenient for users to flexibly adjust and control, and convenient for fitness equipment to be suitable for different users.

[0036] In the utility model, the first guide hole 31 and the second guide hole 32 are connected to the first oil cylinder 1 and the connecting pipe 2 respectively.

[0037] In the utility model, a plurality of groups of guide grooves 511 with different cross-sectional areas can also be provided on the regulating valve 5, and the movement of the regulating valve 5 can be controlled so that different guide grooves 511 connect the first oil cylinder 1 and the second oil cylinder 7, so as to control the minimum cross-sectional area when the hydraulic oil flows through the guide grooves 511, and then control the flow rate of the hydraulic oil, and adjust the adjustment damping size during the use of the first oil cylinder 1 and the second oil cylinder 7. Although this structure can also adjust the damping of the linkage oil cylinder, the cross-section of each guide groove 511 is constant, so the damping of the linkage oil cylinder is also certain, and stepless adjustment cannot be performed. Moreover, if the connection between the first guide hole 31 and / or the second guide hole 32 and the guide groove 511 is misaligned during adjustment, it will affect the adjustment result of the linkage oil cylinder and affect the normal use of the user.

[0038] The regulating valve 5 is rotatably arranged in the connecting groove 33. The first diversion hole 31 and / or the second diversion hole 32 are connected to the side wall of the connecting groove 33 and are connected to the side surface of the diversion groove 511. The diversion groove 511 is arc-shaped and arranged on the outer periphery of the regulating valve 5, and the depth of the diversion groove 511 gradually increases or decreases along the extending direction of the diversion groove 511. By controlling the relative rotation of the regulating valve 5 in the connecting groove 33, the first diversion hole 31 and / or the second diversion hole 32 are connected to different positions of the diversion groove 511. The rotatably arranged regulating valve 5 is convenient for adjusting the connection of the first diversion hole 31 and / or the second diversion hole 32 to different positions of the diversion groove 511, facilitating the setting of the minimum cross-sectional area when the hydraulic oil flows through the diversion groove 511, and avoiding the connection misalignment between the first diversion hole 31 and / or the second diversion hole 32 and the diversion groove 511 during the adjustment process.

[0039] In this embodiment, an annular groove 512 is provided on the regulating valve 5, and a sealing ring 54 is arranged in the annular groove 512. The sealing ring 54 is arranged on the side of the diversion groove 511 away from the bottom of the connecting groove 33. The sealing ring 54 penetrates through the connecting groove 33 and seals the connecting groove 33. This structure seals the connecting groove 33 through the sealing ring 54, preventing the leakage of hydraulic oil from the connecting groove 33 and facilitating the use by the user.

[0040] Preferably, a limiting wall 513 is provided on the regulating valve 5, and a fastener 6 is arranged on the connecting seat 3. The fastener 6 abuts against the limiting wall 513 and prevents the regulating valve 5 from disengaging from the connecting groove 33. This structure is simple, facilitating the assembly and disassembly of the regulating valve 5 and the production and maintenance of the linkage cylinder. In this embodiment, at least two fasteners 6 are detachably arranged on the connecting seat 3, and the fasteners 6 are evenly arranged along the circumference of the connecting groove 33.

[0041] The regulating valve 5 includes a valve stem 51 and a control member 52. A positioning portion 514 and a connecting portion are provided on the valve stem 51. A positioning hole 521 adapted to the positioning portion 514 is provided on the control member 52. A nut 53 is detachably arranged on the connecting portion. The nut 53 abuts tightly against the control member 52 and prevents the positioning portion 514 from disengaging from the positioning hole 521. This structure facilitates the production and assembly of the regulating valve 5. The producer can adjust the valve stem of the regulating valve 5 according to needs to make the regulating valve 5 suitable for different linkage cylinders, which is beneficial to reducing production costs. In this embodiment, a threaded portion 515 adapted to the nut 53 is provided at the end of the positioning portion 514, and a receiving groove 522 is provided at the end of the positioning hole 521. The threaded portion 515 passes through the positioning hole 521 and penetrates into the receiving groove 522, and the nut 53 is hidden in the receiving groove 522.

[0042] In the present utility model, the connecting seat 3 is detachably arranged on the first cylinder 1 or the second cylinder 7, and a universal joint 15 is arranged on the connecting seat 3. The setting of the universal joint 15 facilitates the flexible installation of the first cylinder 1 or the second cylinder 7 on the fitness equipment.

[0043] Preferably, a connecting seat 3 and a mounting seat 4 are detachably arranged on the first oil cylinder 1 and the second oil cylinder 7 respectively. A third diversion hole 41 for connecting the second oil cylinder 7 and the connecting pipe 2 is arranged on the mounting seat 4, and a universal joint 15 is arranged on the mounting seat 4. The arrangement of the mounting seat 4 and the third diversion hole 41 enables the first oil cylinder 1 and the second oil cylinder 7 to adopt the same structure, which is beneficial to reducing the types of parts of the linkage oil cylinder and facilitating the assembly and production of the linkage oil cylinder.

[0044] Both the first oil cylinder 1 and the second oil cylinder 7 include a cylinder block 11 and a piston 12. The piston 12 divides the inner cavity of the cylinder block 11 into an oil storage cavity 111 and a ventilation cavity 112. Hydraulic oil is stored in the oil storage cavity 111. An air vent hole 113 is arranged on the outer wall of the ventilation cavity 112. During the movement of the piston 12 on the cylinder block 11, air enters and exits the ventilation cavity 112 through the air vent hole 113. The arrangement of the air vent hole 113 and the ventilation cavity 112 facilitates the flexible movement of the piston 12 in the cylinder block 11, which is convenient for users. Moreover, producers can control the sizes of the oil storage cavity 111 and the ventilation cavity 112 during assembly according to needs to control the maximum stroke of the first oil cylinder 1 and the second oil cylinder 7, which is convenient for producers to control the stroke of the linkage oil cylinder according to needs.

[0045] In the present utility model, the air vent hole 113 is arranged on the side wall of the cylinder block 11. A guide seat 14 is detachably arranged at the end of the cylinder block 11. The ventilation cavity 112 is arranged between the guide seat 14 and the piston 12. A push rod 13 is arranged on the piston 12, and a guide hole 142 is arranged on the guide seat 14. The push rod 13 is slidably arranged in the guide hole 142. The arrangement of the guide seat 14 not only facilitates the stable sliding of the piston 12 but also can prevent the piston 12 from disengaging from the cylinder block 11, which is convenient for the production and processing of the first oil cylinder 1 and the second oil cylinder 7.

[0046] In the present utility model, a universal joint 15 is also arranged at one end of the push rod 13 away from the piston 12. A limiting end 141 is arranged at one end of the guide seat 14 inserted into the cylinder block 11. The limiting end 141 can abut against the end of the piston 12 to prevent the piston 12 from disengaging from the cylinder block 11.

[0047] The above embodiments are only the preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A linkage oil cylinder, comprising a first oil cylinder (1) and a second oil cylinder (7), wherein the first oil cylinder (1) and the second oil cylinder (7) are connected via a connecting pipe (2), characterized in that: The connecting pipe (2) is connected to a connecting seat (3), and the connecting seat (3) is provided with a first flow guide hole (31), a second flow guide hole (32) and a connecting groove (33). The hydraulic oil in the first oil cylinder (1) and the second oil cylinder (7) flows alternately between the first oil cylinder (1) and the second oil cylinder (7) through the connecting pipe (2), the first flow guide hole (31), the second flow guide hole (32) and the connecting groove (33). A regulating valve (5) is movably provided in the connecting groove (33). The throttle valve (5) is provided with a guide groove (511) with a gradually decreasing cross section, and the first guide hole (31) and the second guide hole (32) are respectively connected to the guide groove (511); the regulating valve (5) is controlled to move relatively in the connecting groove (33), thereby changing the connection position between the first guide hole (31) and / or the second guide hole (32) and the guide groove (511), thereby changing the minimum cross-sectional area of ​​the hydraulic oil when it flows through the guide groove (511), thereby controlling the flow rate of the hydraulic oil.

2. A linkage oil cylinder according to claim 1, characterized in that: The regulating valve (5) is rotatably arranged in the connecting groove (33); the first guide hole (31) and / or the second guide hole (32) are connected to the side wall of the connecting groove (33) and are connected to the side of the guide groove (511); the guide groove (511) is arranged in an arc shape on the outer periphery of the regulating valve (5); and the depth of the guide groove (511) gradually increases or decreases along the extension direction of the guide groove (511); the regulating valve (5) is controlled to rotate relatively in the connecting groove (33) so that the first guide hole (31) and / or the second guide hole (32) are connected to different positions of the guide groove (511).

3. A linkage oil cylinder according to claim 2, characterized in that: The regulating valve (5) is provided with a sealing ring (54), which is arranged on a side of the guide groove (511) away from the bottom of the connecting groove (33), and the sealing ring (54) penetrates the connecting groove (33) and seals the connecting groove (33).

4. The linkage oil cylinder according to claim 2, characterized in that: The regulating valve (5) is provided with a limiting wall (513), and the connecting seat (3) is provided with a fastener (6), the fastener (6) abuts against the limiting wall (513) and prevents the regulating valve (5) from being separated from the connecting groove (33).

5. The linkage oil cylinder according to claim 1, characterized in that: The connecting seat (3) is detachably arranged on the first oil cylinder (1) or the second oil cylinder (7), and a universal connecting head (15) is arranged on the connecting seat (3).

6. The linkage oil cylinder according to claim 5, characterized in that: The first oil cylinder (1) and the second oil cylinder (7) are respectively detachably provided with a connecting seat (3) and a mounting seat (4); the mounting seat (4) is provided with a third flow guide hole (41) for connecting the second oil cylinder (7) and the connecting pipe (2); and the mounting seat (4) is provided with a universal connector (15).

7. The linkage oil cylinder according to claim 1, characterized in that: The first oil cylinder (1) and the second oil cylinder (7) both comprise a cylinder body (11) and a piston (12); the piston (12) divides the inner cavity of the cylinder body (11) into an oil storage cavity (111) and a ventilation cavity (112); hydraulic oil is stored in the oil storage cavity (111); a ventilation hole (113) is provided on the outer wall of the ventilation cavity (112); and when the piston (12) moves on the cylinder body (11), air enters and exits the ventilation cavity (112) through the ventilation hole (113).

8. The linkage oil cylinder according to claim 7, characterized in that: The ventilation hole (113) is arranged on the side wall of the cylinder body (11); a guide seat (14) is detachably arranged at the end of the cylinder body (11); the ventilation chamber (112) is arranged between the guide seat (14) and the piston (12); a push rod (13) is arranged on the piston (12); a guide hole (142) is arranged on the guide seat (14); and the push rod (13) is slidably arranged in the guide hole (142).

9. The linkage oil cylinder according to claim 1, characterized in that: The regulating valve (5) comprises a valve stem (51) and a control member (52); the valve stem (51) is provided with a positioning portion (514) and a connecting portion; the control member (52) is provided with a positioning hole (521) adapted to the positioning portion (514); a nut (53) is detachably provided on the connecting portion; the nut (53) is tightly pressed against the control member (52) and prevents the positioning portion (514) from being separated from the positioning hole (521).

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