Sliding mechanism of swing arm hinge point
By cooperating with the drive device in the slider, changing the position of the swing arm hinge point, the problem of difficult adjustment of the crankshaft work angle in the piston crank structure is solved, and the efficient operation of the engine under different working conditions is achieved.
Patent Information
- Application Number
- CN202422160284.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing piston crank structure is difficult to flexibly adjust the crankshaft work angle, resulting in poor performance of the engine under different working conditions, high noise and poor fuel economy.
A sliding mechanism for the hinge point of the swing arm is designed. By cooperating with the drive device in the slider in the slide groove, the position of the hinge point of the swing arm is changed, and a stepless adjustment of the crankshaft work angle is achieved. A hydraulic cylinder or linear motor is used to provide push and pull force to prevent the slide from moving.
It realizes efficient operation of the engine under different working conditions, reduces noise, improves fuel economy, and extends the service life of the equipment.
Smart Images
Figure CN223203361U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power equipment manufacturing, and more particularly to a sliding mechanism of a swing arm hinge point of a piston crank device. Background Art
[0002] After years of experimentation, we have designed a piston crank mechanism that utilizes a hinged swing arm and connecting rod. This swing arm's movement significantly increases the crankshaft's power (intake) angle, which is widely used in gasoline, diesel engines, and air compressors. In practice, we have devised a mechanism that allows for a significant change in the crankshaft's power (intake) angle by making small movements around the upper or lower connecting rod hinges at the swing arm's hinge point with the frame. To this end, we have designed and manufactured a piston crank mechanism with two-speed power switching output. We have also separately applied for a patent for this mechanism that pushes the slider on the frame. Summary of the Invention
[0003] A sliding mechanism for the swing arm hinge point of a piston crank mechanism is provided. The hinge point between the swing arm and the frame is designed to be inside the slider of the slide groove. The slider is driven by a power device to move the swing arm hinge point, thereby changing the position of the swing arm hinge point and realizing the switching of the crankshaft's working (intake) angle.
[0004] The utility model adopts the following technical solution: a sliding mechanism of a swing arm hinge point, including a frame, a cylinder assembly, a piston, a connecting rod assembly and a crankshaft assembly, characterized in that the connecting rod assembly is composed of an upper connecting rod and a lower connecting rod hinged to the distal end of the swing arm, the upper connecting rod is hinged to the piston, the lower connecting rod is hinged to the crank and the crankshaft, and the proximal end of the swing arm is hinged to the sliding mechanism on the frame slide groove; the sliding mechanism includes a slider in the slide groove and a driving device.
[0005] The main difference between this sliding mechanism and the traditional mechanism is that the upper connecting rod and the lower connecting rod are respectively hinged to the upper and lower hinge holes at the far end of the swing arm, or hinged to the common hole at the far end of the swing arm; the swing hole at the single-hole end of the swing arm is hinged to the slider. After the slider slides in the slide groove of the frame, the swing center position of the swing arm changes. The swing of the single-hole end of the swing arm will change the stroke of the piston. In this way, when the piston is at the bottom dead center, the position of the hinge point between the swing arm and the upper and lower connecting rods will change, thereby redistributing the piston stroke and the rotation angle of the crankshaft for each stroke. Usually, a gear is set at each end of the slide groove of the frame, and the two gears can be adjusted steplessly. This switching of the piston stroke and the crankshaft rotation angle makes the mechanism easier to adapt to different working conditions and loads. The main innovation is that no matter what position the slider is in, the drive device will provide a thrust or pull to the slider to prevent the slider from moving.
[0006] Preferably, the slide groove is an arc-shaped structure provided on the circumference of a circle centered on the hinge hole at the distal end of the swing arm at the top dead center of the piston, so as to realize stepless adjustment.
[0007] As an advantage, the chute is a straight line device between the two end points of the arc structure. Because we use a two-speed setting, we choose to adjust it during inhalation, and use a straight line device instead of an arc structure to simplify the manufacturing cost.
[0008] Preferably, the driving device of the slider is a hydraulic cylinder, and one end of the bidirectional hydraulic cylinder is hinged to the frame.
[0009] Preferably, the driving device of the slider is a linear motor, one end of which is hinged to the frame.
[0010] As an advantage, the slider has a driving device to counteract it at any position, so that stepless adjustment can be achieved. In other words, the driving device can provide a pulling force or a pushing force to prevent the slider from loosening at any position.
[0011] Due to the adoption of the above technical solution, the utility model provides a sliding mechanism for the hinge point of the swing arm, the key point of which is that the driving device will provide a thrust or a pull to the slider at any position to prevent the slider from moving. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of a sliding mechanism of the present invention, in which the right end is applied to the upper and lower connecting rods to jointly hinge the swing arm at the top dead center of the piston;
[0013] Figure 2 This is a schematic diagram of a sliding mechanism of the present invention, in which the right end is applied to the upper and lower connecting rods to jointly hinge the swing arm at the bottom dead center of the piston;
[0014] Figure 3 This is a schematic diagram of the right end of a curved slider in a sliding mechanism of the utility model;
[0015] Figure 4 This is a schematic diagram of the top dead center of a piston in which the left end of a sliding mechanism is applied to a swing arm and upper and lower connecting rods;
[0016] Figure 5 This is a schematic diagram of the left end of a curved slider in a sliding mechanism of the utility model;
[0017] Figure 6 This is a schematic diagram of the top dead center combination of the left and right pistons of a sliding mechanism arc-shaped slider in the utility model;
[0018] Figure 7 This is a schematic diagram of the utility model of a sliding mechanism with double holes hinged to the upper and lower connecting rods, the arc-shaped slider and the piston top dead center combination on the left and right ends;
[0019] Figure 8 This is a schematic diagram of the right end of a linear slider of a hydraulic drive device of the utility model;
[0020] Figure 9 This is a schematic diagram of the left end of a linear slider of a hydraulic drive device of the utility model;
[0021] Figure 10 This is a schematic diagram of the left and right ends of a linear slider that is applied to a three-hole swing arm and swings through a hinge hole below the swing arm.
[0022] Figure 11 This is a schematic diagram of the distribution of multiple groups of linear motors driven along the cylinder direction of a sliding mechanism swing arm of the utility model;
[0023] Figure 12 This is a schematic diagram of the upper and lower dead points of the starting group of a sliding mechanism of the present invention;
[0024] Figure 13 This is a schematic diagram of the upper and lower dead points of the end point group of a sliding mechanism of the present invention;
[0025] In the picture:
[0026] 1. Frame, 2. Cylinder assembly, 3. Piston, 4. Upper connecting rod, 5. Swing arm, 6. Upper hinge hole, 7. Lower hinge hole, 8. Swing hole, 9. Lower connecting rod, 10. Crank, 11. Crankshaft, 12. Arc slide, 13. Linear slide, 14. Arc slider, 15. Slider, 16. Linear motor, 17. Hydraulic oil hole, 18. Hydraulic cylinder, 19. Common hole. 001 is the radius: the length of the lower connecting rod plus the length of the crank. 002 is the radius: the length of the lower connecting rod minus the length of the crank. 003 is the radius: the effective length of the swing arm. DETAILED DESCRIPTION
[0027] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.
[0028] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided solely to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.
[0029] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] Example 1, combined with Figure 1-6 A sliding mechanism for a swing arm hinge point includes a frame 1, a cylinder assembly 2, a piston 3, an upper connecting rod 4, a swing arm 5, a lower connecting rod 9, a crank 10, a crankshaft 11, an arcuate slide 12, an arcuate slider 14, and a linear motor 16. The crank 10 is 100 mm long, the lower connecting rod 9 is 150 mm long, the upper connecting rod 4 is length-matched to the stroke, and the lower connecting rod 9 and the upper connecting rod 4 are hinged to a common hole 19 of the swing arm 5. The effective length of the swing arm 5 is 250 mm. When operating at 260 degrees, the distance from the center of the crankshaft 11 to the center of the arcuate slider 14 is 207.2 mm. The frame 1 is provided with an arcuate slot 12. When the piston 3 is at top dead center, the swing arm 5, upper connecting rod 4, and lower connecting rod 9 are hinged at a common hole 19. An arcuate slider 14 is located at the right end of the arcuate slot 12. The center of the arcuate slider 14 is hinged to the swing hole 8 of the swing arm 5. The piston 3 is hinged to the upper connecting rod 4, the swing arm 5, the lower connecting rod 9, the crank 10, and the crankshaft 11 in sequence.
[0031] When the mechanism is working, the explosion of the mixed gas in the cylinder assembly 2 pushes the piston 3 downward to perform work, the upper connecting rod 4 pushes the swing arm 5 to swing downward, and the hinge point of the lower connecting rod 9 and the crank 10 runs clockwise downward, pushing the crankshaft 11 to perform work. At this time, the swing arm 5 rotates 59 degrees, the stroke of the piston 3 is 246.3 mm, and the crankshaft 11 has performed work 260 degrees; the piston 3 runs to the bottom dead center, the lower connecting rod 9 and the crank 10 coincide on a line, and the inertia of the crankshaft 11 needs to continue to rotate. The crank 10 drives the lower connecting rod 9 to continue to rotate clockwise, pushing the swing arm 5, the upper connecting rod 4 and the piston 3 to quickly upward to discharge the gas in the cylinder assembly 2 and run to the top dead center position. All these moving parts rely on the inertia of the crankshaft 11 to repeat the above process, and the cylinder assembly 2 realizes the two strokes of intake and compression. In this way, the engine completes four strokes.
[0032] When the cylinder assembly 2 inhales, two linear motors 16 are activated, one rotating forward and the other counterclockwise, pushing the curved slider 14 leftward along the curved chute 12 until it stops at the edge. The linear distance traveled is 12.5 mm. At this point, the crankshaft 11 rotates 240 degrees during the inhalation of the piston 3, and the distance from the crankshaft 11 centerline to the swing hole 8 of the swing arm 5 is 218.5 mm. The swing arm 5 rotates 54 degrees, and the piston 3 travels 229.1 mm to bottom dead center. The upward movement of the piston 3 changes the compression ratio. Regardless of the left or right position of the curved slider 14, a linear motor 16 prevents it from moving. This allows it to stop at any position, achieving stepless adjustment. This allows for operation in various power output conditions, significantly reducing noise, improving fuel economy, and extending the life of the equipment.
[0033] Example 2, combined with Figure 7 A sliding mechanism for a swing arm hinge point includes a frame 1, a cylinder assembly 2, a piston 3, an upper connecting rod 4, a swing arm 5, a lower connecting rod 9, a crank 10, a crankshaft 11, an arcuate chute 12, an arcuate slider 14, and a hydraulic cylinder 18. The piston 3 is articulated with the upper connecting rod 4, the swing arm 5, the lower connecting rod 9, the crank 10, and the crankshaft 11 in sequence. This mechanism replaces the linear motor 16 with the hydraulic cylinder 18 and is applied to a three-hole swing arm 5 mechanism. The crank 10 is 100 mm long, the lower connecting rod 9 is 160 mm long, the distance between the upper hinge hole 6 and the swing hole 8 of the swing arm 5 is 280.9 mm, and the distance between the lower hinge hole 7 and the swing hole 8 is 260 mm. The distance between the upper hinge hole 6 and the lower hinge hole 7 of the swing arm 5 is 35 mm. The distance from the center of the crankshaft 11 to the center of the arcuate slider 14 is 266.2 mm. The upper hinge hole 6 and the lower hinge hole 7 of the swing arm 5 are hinged to the upper connecting rod 4 and the lower connecting rod 9 respectively. An arc-shaped slide groove 12 is provided on the frame 1. The arc-shaped slide groove 12 is an arc-shaped structure with the upper hinge hole 6 of the swing arm 5 as the center when the piston 3 is at the top dead center; the arc-shaped slider 14 is located at the right end of the arc-shaped slide groove 12, and the center of the arc-shaped slider 14 is hinged to the swing hole 8 of the swing arm 5.
[0034] When the mechanism is working, the explosion of the mixed gas in the cylinder assembly 2 pushes the piston 3 downward to perform work, the upper connecting rod 4 pushes the swing arm 5 to swing downward, and the hinge point of the lower connecting rod 9 and the crank 10 runs clockwise downward, pushing the crankshaft 11 to perform work, and the stroke of the piston 3 is 249.4 mm. The piston 3 runs to the bottom dead center, and the crankshaft 11 performs work for 234.9 degrees; the lower connecting rod 9 and the crank 10 overlap on a line, and the inertia of the crankshaft 11 needs to continue to rotate. The crank 10 drives the lower connecting rod 9 to continue to rotate clockwise, pushing the swing arm 5, the upper connecting rod 4 and the piston 3 to quickly move upward to discharge the gas in the cylinder assembly 2 and run to the top dead center. All these moving parts rely on the inertia of the crankshaft 11 to repeat the above process, and the cylinder assembly 2 realizes the two strokes of intake and compression. In this way, the engine completes four strokes.
[0035] When cylinder assembly 2 is energized, the high-pressure oil pump is activated, and hydraulic cylinder 18 pushes curved slider 14 leftward along curved chute 12 until it stops on the left side of the chute. The linear distance of curved slider 14 is 44.1 mm, and the distance from the center of curved slider 14 to the center of crankshaft 11 is 225.4 mm. At this point, piston 3 rotates 198.4 degrees on crankshaft 11, and piston 3 travels 220.4 mm to bottom dead center. The piston then moves upward, changing the compression ratio. This completes the power and exhaust cycles. Regardless of the left or right position of curved slider 14, hydraulic cylinder 18 prevents movement, achieving stepless adjustment. This ensures optimal output for the desired operating conditions, significantly reducing noise, improving fuel economy, and extending the life of the equipment.
[0036] Example 3, combined with Figure 8-10 A sliding mechanism for a swing arm hinge point includes a frame 1, a cylinder assembly 2, a piston 3, an upper connecting rod 4, a swing arm 5, a lower connecting rod 9, a crank 10, a crankshaft 11, a linear guide 13, a slider 15, and a hydraulic cylinder 18. The piston 3 is articulated with the upper connecting rod 4, the swing arm 5, the lower connecting rod 9, the crank 10, and the crankshaft 11 in sequence. The crank 10 is 100 mm long, the upper connecting rod 4's length matches the stroke, the three holes in the swing arm 5 are the upper hinge hole 6, the lower hinge hole 7, and the swing hole 8, the lower connecting rod 9 is 150 mm long, the distance between the lower hinge hole 7 and the swing hole 8 of the swing arm 5 is 250 mm, the distance between the upper hinge hole 6 and the lower hinge hole 7 of the swing arm 5 is 32 mm, the distance between the swing hole 8 and the upper hinge hole 6 of the swing arm 5 is 248.5 mm, and the distance from the center of the crankshaft 11 to the hinge hole 8 is 244.3 mm. A linear slide 13 is provided on the frame 1. The linear slide 13 is the connecting line of the two end points of the arc structure with the upper hinge hole 6 and the lower hinge hole 7 of the swing arm 5 as the center and the hinge points of the upper connecting rod 4 and the lower connecting rod 9 respectively when the piston 3 is at the top dead center; the slider 15 is located at the right end of the linear slide 13, and the center of the slider 15 is hinged to the swing hole 8 of the swing arm 5.
[0037] When the mechanism is working, the explosion of the mixed gas in the cylinder assembly 2 pushes the piston 3 downward to perform work, the upper connecting rod 4 pushes the swing arm 5 to swing downward, and the hinge point of the lower connecting rod 9 and the crank 10 runs clockwise downward, pushing the crankshaft 11 to perform work. At this time, the swing arm 5 rotates 49.2 degrees, the stroke of the piston 3 is 207 mm, the piston 3 runs to the bottom dead center, and the crankshaft 11 has performed work for 210 degrees; the lower connecting rod 9 and the crank 10 overlap on a line, and the inertia of the crankshaft 11 needs to continue to rotate. The crank 10 drives the lower connecting rod 9 to continue to rotate clockwise, pushing the swing arm 5, the upper connecting rod 4 and the piston 3 to quickly upward to discharge the gas in the cylinder assembly 2 and run to the top dead center. All these moving parts rely on the inertia of the crankshaft 11 to repeat the above process, and the cylinder assembly 2 realizes the two strokes of intake and compression. In this way, the engine completes four strokes.
[0038] When cylinder assembly 2 is absorbing air, the high-pressure oil pump is activated, and hydraulic cylinder 18 pushes slider 15 leftward along linear guideway 13 until it stops on the left side of the guideway 13. The slider 15 travels a linear distance of 23.3 mm, and the distance between the center of slider 15 and the center of crankshaft 11 is 264.3 mm. The swing arm 5 rotates 47.4 degrees. At this point, piston 3 inhales air, rotating crankshaft 11 by 190 degrees. The piston 3 travels 199.74 mm to bottom dead center, and then moves upward to change the compression ratio. This completes power generation and exhaust. Regardless of the left or right position of slider 15, hydraulic cylinder 18 prevents movement, enabling left and right gear adjustment. This ensures optimal output conditions, minimizes noise, improves fuel economy, and extends the service life of the equipment.
[0039] Example 4, combined with Figure 11-13 A sliding mechanism for a swing arm hinge point includes a frame 1, a cylinder assembly 2, a piston 3, an upper connecting rod 4, a swing arm 5, a lower connecting rod 9, a crank 10, a crankshaft 11, a linear slide 13, a slider 15, and a linear motor 16. The piston 3 is hinged to the upper connecting rod 4, the swing arm 5, the lower connecting rod 9, the crank 10, and the crankshaft 11 in sequence. The crank 10 is 100 mm long, the upper connecting rod 4 has a length that matches the stroke, the common hole 19 and the swing hole 8 on the swing arm 5, and the lower connecting rod 9 are 150 mm long, and the distance from the common hole 19 to the swing hole 8 on the swing arm 5 is 257 mm. The linear slide 13 is parallel to the cylinder assembly 2, and the swing hole 8 on the swing arm 5 is hinged to the slider 15. The slider 15 is embedded in the linear slide 13 and driven by the linear motor 16.
[0040] Figure 11 Schematic diagram of the multiple linear motor-driven arrangements of a sliding mechanism's swing arm along the cylinder. The radius of 001 is the length of the lower connecting rod 9 plus the length of the crank 10, which is 250 mm. The radius of 002 is the length of the lower connecting rod 9 minus the length of the crank 10, which is 50 mm. The radius of 003 is the effective length of the swing arm 5, 257 mm. This is a combined schematic diagram of the arrangement of multiple swing arm connecting rods.
[0041] Figure 12 : A schematic diagram of the upper and lower dead point combination of the starting group of a sliding mechanism; the slider 15 is located at the upper position of the linear slide 13, the distance from the proximal hole 8 to the center of the crankshaft 11 is 260.5 mm, the stroke of the piston 3 is 203.16 mm, the rotation angle of the swing arm 5 is 47 degrees, and the crankshaft working angle is 200 degrees.
[0042] Figure 13 : A schematic diagram of the upper and lower dead point combination of the end group of a sliding mechanism; the slider 15 is located at the lower position of the linear slide 13, the distance from the proximal hole 8 to the center of the crankshaft 11 is 233 mm, the stroke of the piston 3 is 220.7 mm, the rotation angle of the swing arm 5 is 51 degrees, and the crankshaft working angle is 229 degrees.
[0043] As an air pump, when working: the slider 15 is at the top of the starting position Figure 12In the state, the crankshaft 11 pushes the crank 10, the lower connecting rod 9, the swing arm 5, the upper connecting rod 4 and the piston 3 to rotate counterclockwise, and slowly moves upward to discharge the gas in the cylinder assembly 2. When it reaches the top dead center, the cylinder assembly 2 closes the gas supply valve and opens the intake valve. The crankshaft 11 drives the crank 10, the lower connecting rod 9, the swing arm 5, the upper connecting rod 4 and the piston 3 to move downward counterclockwise to inhale. When they reach the bottom dead center, the intake valve is closed and the gas supply valve is opened to repeat the above process. The cylinder assembly 2 realizes the two strokes of intake and delivery. Start the linear motor 16 and push the slider 15 to move downward along the linear slide 13. It can stop at any position to realize stepless adjustment; it goes down again and stops at the bottom of the linear slide 13. Figure 13 The location of the data is also Figure 13 The sliding straight-line distance is 60 mm; the slider 15 can slide upward to select any working position, realizing a variety of different air supply speeds, so that it can be used in different power output conditions, with the advantages of reasonably reducing noise, improving fuel economy, and extending the service life of the equipment.
Claims
1. A sliding mechanism of a swing arm hinge point, comprising a frame, a cylinder assembly, a piston, a connecting rod assembly and a crankshaft assembly, characterized in that: The connecting rod assembly is composed of an upper connecting rod and a lower connecting rod hinged to the distal end of the swing arm. The upper connecting rod is hinged to the piston, the lower connecting rod is hinged to the crank and crankshaft, and the proximal end of the swing arm is hinged to the sliding mechanism on the frame slide slot; the sliding mechanism includes a slider in the slide slot and a driving device.
2. The sliding mechanism of the swing arm hinge point according to claim 1, characterized in that: The sliding groove is an arc-shaped structure provided on the circumference of a circle with the hinge hole at the far end of the swing arm as the center at the top dead center position of the piston.
3. The sliding mechanism of the swing arm hinge point according to claim 2, characterized in that: The chute is a straight line device between two end points of the arc structure.
4. The sliding mechanism of the swing arm hinge point according to claim 3, characterized in that: The driving device of the sliding block is a hydraulic cylinder, and one end of the bidirectional hydraulic cylinder is hinged to the frame.
5. The sliding mechanism of the swing arm hinge point according to claim 4, characterized in that: The driving device of the slide block is a linear motor, one end of which is hinged to the frame.
6. A sliding mechanism for a swing arm hinge point according to claim 1, 2, 3, 4 or 5, characterized in that: The slider is offset by a driving device at any position.