A synchronous belt stroke multiplier mechanism

Abstract

This invention discloses a synchronous belt stroke multiplier mechanism, comprising a frame, a first extension mechanism, a second extension mechanism, and a third extension mechanism. The first extension mechanism is slidably connected to the frame, and a rotary motor is also mounted on the frame. The rotary motor further drives a first synchronous belt module, and a second synchronous belt module connected to the first synchronous belt module is also mounted on the frame. The first extension mechanism is connected to the second synchronous belt module. This invention uses a motor as a power source, and the cooperation between the multi-stage synchronous pulley group and the clamping block enables the three-layer extension mechanism to slide out sequentially from bottom to top, making full use of the vertical stacked space. With the same stroke output, the overall space occupied is smaller, making it particularly suitable for scenarios where space is limited but a large range of reciprocating motion is required.

Description

Technical Field

[0001] This invention relates to the field of automation technology, and in particular to a synchronous belt stroke multiplier mechanism. Background Technology

[0002] Synchronous belt stroke multiplier mechanisms are mainly used in automated equipment to achieve "short-stroke drive, long-stroke output," proportionally amplifying the output stroke of linear motion. Currently, chain-type stroke multiplier mechanisms and rack and pinion-type stroke multiplier mechanisms are two common long-stroke extension solutions in the field of automated linear drives, and they differ significantly in transmission characteristics, cost, and applicable operating conditions.

[0003] Among them, the chain-type stroke multiplier mechanism is based on the meshing transmission of sprockets and chains. It relies on the flexible winding of the chain to amplify the stroke. However, due to the inherent polygonal effect of the chain, it will generate obvious vibration and noise when running at high speed, and requires regular lubrication and maintenance.

[0004] The rack and pinion stroke multiplier mechanism is based on the precise meshing of gears and racks. It relies on the rotation of gears to drive racks to achieve a wide range of linear motion. It has high transmission accuracy and sufficient rigidity, but it has limitations such as high cost, high installation accuracy requirements, and the need for lubrication. Summary of the Invention

[0005] The purpose of this invention is to provide a synchronous belt stroke multiplier mechanism. This mechanism uses a motor as a power source, and the cooperation between the multi-stage synchronous pulley group and the clamping block enables the three-layer extension mechanism to slide out in a sequential order from bottom to top. It makes full use of the vertical stacked space and occupies less space overall under the same stroke output. It is especially suitable for scenarios where space is limited but a large range of reciprocating motion is required.

[0006] To achieve the above objectives, the following technical solution is adopted: A synchronous belt stroke multiplier mechanism includes a frame, a first extension mechanism, a second extension mechanism, and a third extension mechanism. The first extension mechanism is slidably connected to the frame, and a rotary motor is also mounted on the frame. The rotary motor further drives a first synchronous belt module, and a second synchronous belt module connected to the first synchronous belt module is also mounted on the frame. The first extension mechanism is connected to the second synchronous belt module. A third synchronous belt module connected to the second synchronous belt module is mounted on the first extension mechanism, and when the second synchronous belt module operates, it can drive the third synchronous belt module to operate synchronously in the same transmission direction. The second extension mechanism is slidably arranged on the first extension mechanism and connected to the third synchronous belt module. A fourth synchronous belt module is also mounted on the second extension mechanism. The third extension mechanism is slidably arranged on the second extension mechanism. The slack side of the fourth synchronous belt module is connected to the first extension mechanism, and the tight side of the fourth synchronous belt module is connected to the third extension mechanism.

[0007] Furthermore, the frame includes a frame base plate, and a frame side plate is connected to each of the top two sides of the frame base plate; the rotary motor is mounted on one of the frame side plates; the first synchronous belt module includes a first transmission belt, a driving pulley, and a driven pulley; the first extension mechanism includes two first side plates and a first clamping block; a first connecting plate is also connected between the two first side plates; a first slide rail is installed on each of the two frame side plates along their length, and the two first side plates are slidably connected to a first slide rail respectively; the second synchronous belt module includes a first drive shaft and a first fixed shaft; the first drive shaft is rotatably connected to... Between one end of the two frame side plates, a first fixed shaft is rotatably connected between the other ends of the two frame side plates; the driving wheel is mounted on the output shaft of the rotary motor, and the driven wheel is mounted on the first transmission shaft; the first transmission belt is wound between the driving wheel and the driven wheel; a first power wheel is also mounted on the first transmission shaft, and a first driven wheel is also mounted on the first fixed shaft, and a second transmission belt is wound between the first power wheel and the first driven wheel; the first clamping block is connected to the lower side of the second transmission belt, and a clamping block connecting plate is also connected to the top end of the first clamping block; the clamping block connecting plate is connected to the bottom of one of the first side plates.

[0008] Furthermore, a second slide rail is installed on the top of each of the first side plates along its length; the second extension mechanism includes a first slide plate, and the bottom sides of the first slide plate are slidably connected to a second slide rail; the third synchronous belt module includes a second drive shaft, a second fixed shaft, an idler pulley, and a second clamping block; the second drive shaft is rotatably connected between one end of the two first side plates, and the second fixed shaft is rotatably connected between the other ends of the two first side plates; the idler pulley is installed on the second drive shaft, and the upper edge of the second transmission belt is also wound around the idler pulley; a second drive wheel is also installed on the second drive shaft, and a second driven wheel is also installed on the second fixed shaft, and a third transmission belt is wound between the second drive wheel and the second driven wheel; the second clamping block is connected to the lower edge of the third transmission belt, and a first extension plate extends upward from the top end of the second clamping block; the first extension plate is connected to the bottom end of the first slide plate.

[0009] Furthermore, a third slide rail is installed on each of the top two sides of the first slide plate along its length; the third extension mechanism includes a second slide plate, and the bottom two sides of the second slide plate are slidably connected to a third slide rail; the fourth synchronous belt module includes a transition shaft, a third clamping block, and a fourth clamping block; a first fixing block is also connected to one end of the bottom of the first slide plate located on one side of the first extension plate, and the transition shaft is rotatably connected between the first fixing block and the first extension plate; two second fixing blocks are also connected to the other end of the bottom of the first slide plate, the two second fixing blocks are arranged opposite to each other, and the two second fixing blocks are... A third fixed shaft is rotatably connected between the blocks; a first synchronous pulley is installed on the transition shaft, and a second synchronous pulley is installed on the third fixed shaft, and a fourth transmission belt is wound between the first synchronous pulley and the second synchronous pulley; the third clamping block is connected to the upper side of the fourth transmission belt, and a second extension plate extends upward from the top of the third clamping block; a first sliding hole is opened at the top of the first slide plate along its length direction, and the second extension plate passes through the first sliding hole and connects to the bottom of the second slide plate; the fourth clamping block is connected to the lower side of the fourth transmission belt, and one end of the fourth clamping block is connected to one side of one of the first side plates.

[0010] Furthermore, a first tensioner is installed on one of the frame side plates above the first transmission belt; two second tensioners are installed on one of the first side plates above the second transmission belt, with an idler wheel located between the two second tensioners; a tension adjustment block is installed on the other end of each of the two frame side plates on opposite sides, and a first fixed shaft is rotatably connected between the two tension adjustment blocks.

[0011] Furthermore, a slotted sensor is installed on one side of one of the frame side panels, and a sensing element that works in conjunction with the slotted sensor is installed at one end of the first side panel.

[0012] By adopting the above solution, the beneficial effects of the present invention are: 1) Using synchronous belt drive instead of chain or rack and pinion, synchronous belt has the characteristics of good flexibility and small bending radius, which allows multi-stage synchronous pulley sets to be compactly arranged in a small space; at the same time, the three-layer extension mechanism slides out in sequence from bottom to top, making full use of the vertical stacked space, and occupying less space overall under the same stroke output, which is especially suitable for scenarios with limited space but requiring a large range of reciprocating motion. 2) By using a synchronous belt, low-friction and high-efficiency power transmission can be achieved without additional lubrication, fundamentally eliminating the risk of oil contamination. It can be directly applied to clean or food-grade environments with strict cleanliness requirements, such as consumer electronics assembly, medical sample processing, and food packaging. 3) Synchronous belts and synchronous pulleys are standard parts, which do not require complex tooth profile machining like gears and racks, nor do they require precision sprocket machining and lubrication systems required for chain drives. Each extension mechanism is connected to the synchronous belt through clamping blocks, making the assembly relationship clear, debugging and maintenance convenient, and the overall manufacturing cost is significantly lower than that of traditional solutions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 for Figure 2 An exploded view omitting the back panel of one of the frames; Figure 4 for Figure 3 Exploded view omitting one of the first side plates and the third extension mechanism; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 This is a schematic diagram of the structure of the first side plate, the third synchronous belt module, and the fourth synchronous belt module of the present invention; The following are explanations of the labels in the attached diagram: 1. First extension mechanism; 2. Second extension mechanism; 3. Third extension mechanism; 4. Rotary motor; 5. First synchronous belt module; 6. Second synchronous belt module; 7. Third synchronous belt module; 8. Fourth synchronous belt module; 11. First side plate; 12. First clamping block; 13. First connecting plate; 21. First sliding plate; 22. Third slide rail; 23. First sliding hole; 51. First transmission belt; 52. Driving pulley; 53. Driven pulley; 61. First transmission shaft; 62. First fixed shaft; 63. First power pulley; 64. First driven pulley; 65. Second transmission belt; 71. Second transmission shaft; 72. Second fixed shaft; 73. Idler pulley; 74. Second 75. Clamping block; 76. Second driving wheel; 77. Second driven wheel; 78. Third transmission belt; 89. Transition shaft; 80. Third clamping block; 81. Fourth clamping block; 82. First fixing block; 83. Second fixing block; 84. Third fixing shaft; 85. First synchronous pulley; 86. Second synchronous pulley; 87. Fourth transmission belt; 101. Frame base plate; 102. Frame side plate; 103. First slide rail; 104. Second slide rail; 105. First tensioner; 106. Second tensioner; 107. Tensioning adjustment block; 108. Slotted sensor; 109. Sensing plate; 121. Clamping block connecting plate; 741. First extension plate; 821. Second extension plate. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0015] Reference Figures 1 to 6 As shown, the present invention provides a synchronous belt stroke multiplier mechanism. In one embodiment, it includes a frame, a first extension mechanism 1, a second extension mechanism 2, and a third extension mechanism 3. The first extension mechanism 1 is slidably connected to the frame, and a rotary motor 4 is also installed on the frame. The rotary motor 4 also drives a first synchronous belt module 5, and a second synchronous belt module 6 connected to the first synchronous belt module 5 is also installed on the frame. The first extension mechanism 1 is connected to the second synchronous belt module 6. A third synchronous belt module 7 connected to the second synchronous belt module 6 is installed on the first extension mechanism 1. When the second synchronous belt module 6 operates, it can drive the third synchronous belt module 7 to operate synchronously in the same transmission direction. The second extension mechanism 2 is slidably arranged on the first extension mechanism 1 and connected to the third synchronous belt module 7. A fourth synchronous belt module 8 is also installed on the second extension mechanism 2. The third extension mechanism 3 is slidably arranged on the second extension mechanism 2. The slack side of the fourth synchronous belt module 8 is connected to the first extension mechanism 1, and the tight side of the fourth synchronous belt module 8 is connected to the third extension mechanism 3.

[0016] Preferably, the frame includes a frame base plate 101, and a frame side plate 102 is connected to each of the top two sides of the frame base plate 101; the rotary motor 4 is mounted on one of the frame side plates 102; the first synchronous belt module 5 includes a first transmission belt 51, a driving pulley 52, and a driven pulley 53; the first extension mechanism 1 includes two first side plates 11 and a first clamping block 12; a first connecting plate 13 is also connected between the two first side plates 11; a first slide rail 103 is installed on each of the two frame side plates 102 along its length, and the two first side plates 11 are slidably connected to a first slide rail 103 respectively; the second synchronous belt module 6 includes a first transmission shaft 61 and a first fixed shaft 62; the first transmission shaft 61 is rotatably connected to the two... Between one end of each frame side plate 102, a first fixed shaft 62 is rotatably connected between the other ends of the two frame side plates 102; the driving wheel 52 is mounted on the output shaft of the rotary motor 4, and the driven wheel 53 is mounted on the first transmission shaft 61; the first transmission belt 51 is wound between the driving wheel 52 and the driven wheel 53; a first power wheel 63 is also mounted on the first transmission shaft 61, and a first passive wheel 64 is also mounted on the first fixed shaft 62, and a second transmission belt 65 is wound between the first power wheel 63 and the first passive wheel 64; the first clamping block 12 is connected to the lower side of the second transmission belt 65, and a clamping block connecting plate 121 is also connected to the top end of the first clamping block 12; the clamping block connecting plate 121 is connected to the bottom of one of the first side plates 11.

[0017] Each of the first side plates 11 has a second slide rail 104 mounted on its top along its length; the second extension mechanism 2 includes a first slide plate 21, and the bottom sides of the first slide plate 21 are slidably connected to a second slide rail 104; the third synchronous belt module 7 includes a second drive shaft 71, a second fixed shaft 72, an idler wheel 73, and a second clamping block 74; the second drive shaft 71 is rotatably connected between one end of the two first side plates 11, and the second fixed shaft 72 is rotatably connected between the other ends of the two first side plates 11; the idler wheel 73... 3 is installed on the second drive shaft 71, and the upper edge of the second drive belt 65 is also wound around the idler wheel 73; the second drive shaft 71 is also installed with a second drive wheel 75, the second fixed shaft 72 is also installed with a second driven wheel 76, and a third drive belt 77 is wound between the second drive wheel 75 and the second driven wheel 76; the second clamping block 74 is connected to the lower edge of the third drive belt 77, and the top end of the second clamping block 74 extends upward with a first extension plate 741; the first extension plate 741 is connected to the bottom end of the first slide plate 21.

[0018] A third slide rail 22 is installed on each of the top two sides of the first slide plate 21 along its length; the third extension mechanism 3 includes a second slide plate, and the bottom two sides of the second slide plate are slidably connected to a third slide rail 22; the fourth synchronous belt module 8 includes a transition shaft 81, a third clamping block 82, and a fourth clamping block 83; a first fixing block 84 is also connected to one bottom end of the first slide plate 21 located on one side of the first extension plate 741, and the transition shaft 81 is rotatably connected between the first fixing block 84 and the first extension plate 741; two second fixing blocks 85 are also connected to the other bottom end of the first slide plate 21, the two second fixing blocks 85 are arranged opposite each other, and the two second fixing blocks 85 can rotate between each other. A third fixed shaft 86 is connected; a first synchronous pulley 87 is installed on the transition shaft 81, and a second synchronous pulley 88 is also installed on the third fixed shaft 86, and a fourth transmission belt 89 is wound between the first synchronous pulley 87 and the second synchronous pulley 88; a third clamping block 82 is connected to the upper side of the fourth transmission belt 89, and a second extension plate 821 extends upward from the top of the third clamping block 82; a first sliding hole 23 is opened at the top of the first sliding plate 21 along its length direction, and the second extension plate 821 passes through the first sliding hole 23 and is connected to the bottom of the second sliding plate; a fourth clamping block 83 is connected to the lower side of the fourth transmission belt 89, and one end of the fourth clamping block 83 is connected to one side of one of the first side plates 11.

[0019] During operation, the rotary motor 4 drives the first synchronous belt module 5, which in turn drives the coaxial second synchronous belt module 6 to operate. The first extension mechanism 1 is connected to the synchronous belt of the second synchronous belt module 6 through the first clamping block 12 and the clamping block connecting plate 121. Under the drive of the second synchronous belt module 6, the first extension mechanism 1 slides forward along the first slide rail 103 mounted on the side plate 102 of the frame.

[0020] The second extension mechanism 2 is provided with an idler wheel 73, which is connected to the second synchronous belt module 6. The third synchronous belt module 7 is coaxially mounted with the idler wheel 73. The second extension mechanism 2 is connected to the synchronous belt of the third synchronous belt module 7 through the second clamping block 74. The first extension plate 741 of the second clamping block 74 is connected to the first sliding plate 21. When the third synchronous belt module 7 starts to move, the second extension mechanism 2, i.e. the first sliding plate 21, slides forward along the second slide rail 104.

[0021] The fourth synchronous belt module 8 is mounted on the second extension mechanism 2. One end of the fourth clamping block 83 in this synchronous pulley assembly is fixed to one of the first side plates 11 of the first extension mechanism 1, and the other end is fixed to the slack side of the fourth synchronous belt module 8, that is, the lower side of the fourth transmission belt 89. The second extension plate 821 of the third clamping block 82 is fixed on the third extension mechanism 3, that is, on the second slide plate. The third clamping block 82 is connected to the tight side of the fourth synchronous belt module 8, that is, the upper side of the fourth transmission belt 89. When the second extension mechanism 2 extends forward, the third synchronous pulley assembly moves forward with it. Since the fourth clamping block 83 fixes the slack side of the synchronous belt in the fourth synchronous belt module 8 to the first extension mechanism 1, the direction of movement of the fourth synchronous belt module 8 is fixed at this time (it can only move forward). When the fourth synchronous belt module 8 moves forward, the third clamping block 82 mounted on the tight side of the synchronous belt in the fourth synchronous belt module 8 drives the third extension mechanism 3 to slide forward along the third slide rail 22.

[0022] Meanwhile, a first tensioner 105 is installed on one of the frame side plates 102 above the first transmission belt 51; two second tensioners 106 are installed on one of the first side plates 11 above the second transmission belt 65, and an idler pulley 73 is located between the two second tensioners 106; a tension adjustment block 107 is installed on the other end of each of the two frame side plates 102 on opposite sides, and a first fixed shaft 62 is rotatably connected between the two tension adjustment blocks 107. The first tensioner 105 is used to adjust the tension of the first transmission belt 51 to prevent slippage and ensure the accuracy of the transmission ratio. The two second tensioners 106 apply preload to the upper edge of the second transmission belt 65 from both sides to ensure reliable connection between the idler pulley 73 and the upper edge of the second transmission belt 65. By adjusting the installation position of the tension adjusting block 107, the center distance between the first fixed shaft 62 and the first transmission shaft 61 can be changed, thereby adjusting the overall tension of the second transmission belt 65. In addition, the second fixed shaft 72 and the third fixed shaft 86 adopt the same configuration as the first fixed shaft 62, which will not be described in detail here.

[0023] Preferably, in order to improve the safety and reliability of the mechanism operation, a slotted sensor 108 is also installed on one side of one of the frame side plates 102, and a sensing element 109 that works in conjunction with the slotted sensor 108 is also installed at one end of the first side plate 11.

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A synchronous belt stroke multiplier mechanism, characterized in that, The system includes a frame, a first extension mechanism, a second extension mechanism, and a third extension mechanism. The first extension mechanism is slidably connected to the frame, and a rotary motor is also mounted on the frame. The rotary motor also drives a first synchronous belt module, and a second synchronous belt module connected to the first synchronous belt module is also mounted on the frame. The first extension mechanism is connected to the second synchronous belt module. A third synchronous belt module connected to the second synchronous belt module is mounted on the first extension mechanism, and when the second synchronous belt module operates, it can drive the third synchronous belt module to operate synchronously in the same transmission direction. The second extension mechanism is slidably arranged on the first extension mechanism and connected to the third synchronous belt module. A fourth synchronous belt module is also mounted on the second extension mechanism. The third extension mechanism is slidably arranged on the second extension mechanism. The slack side of the fourth synchronous belt module is connected to the first extension mechanism, and the tight side of the fourth synchronous belt module is connected to the third extension mechanism.

2. The synchronous belt stroke multiplier mechanism according to claim 1, characterized in that, The frame includes a frame base plate, and a frame side plate is connected to each of the top two sides of the frame base plate; the rotary motor is mounted on one of the frame side plates; the first synchronous belt module includes a first transmission belt, a driving pulley, and a driven pulley; the first extension mechanism includes two first side plates and a first clamping block; a first connecting plate is also connected between the two first side plates; a first slide rail is installed on each of the two frame side plates along their length, and the two first side plates are slidably connected to a first slide rail respectively; the second synchronous belt module includes a first drive shaft and a first fixed shaft; the first drive shaft is rotatably connected to the two... Between one end of the frame side plates, a first fixed shaft is rotatably connected between the other ends of the two frame side plates; the driving wheel is mounted on the output shaft of the rotary motor, and the driven wheel is mounted on the first transmission shaft; the first transmission belt is wound between the driving wheel and the driven wheel; a first power wheel is also mounted on the first transmission shaft, and a first driven wheel is also mounted on the first fixed shaft, and a second transmission belt is wound between the first power wheel and the first driven wheel; the first clamping block is connected to the lower side of the second transmission belt, and a clamping block connecting plate is also connected to the top end of the first clamping block; the clamping block connecting plate is connected to the bottom of one of the first side plates.

3. The synchronous belt stroke multiplier mechanism according to claim 2, characterized in that, Each of the first side plates has a second slide rail mounted on its top along its length; the second extension mechanism includes a first slide plate, and the bottom sides of the first slide plate are slidably connected to a second slide rail; the third synchronous belt module includes a second drive shaft, a second fixed shaft, an idler pulley, and a second clamping block; the second drive shaft is rotatably connected between one end of the two first side plates, and the second fixed shaft is rotatably connected between the other ends of the two first side plates; the idler pulley is mounted on the second drive shaft, and the upper edge of the second drive belt is wound around the idler pulley; a second drive wheel is also mounted on the second drive shaft, and a second driven wheel is also mounted on the second fixed shaft, and a third drive belt is wound between the second drive wheel and the second driven wheel; the second clamping block is connected to the lower edge of the third drive belt, and a first extension plate extends upward from the top end of the second clamping block; the first extension plate is connected to the bottom end of the first slide plate.

4. The synchronous belt stroke multiplier mechanism according to claim 3, characterized in that, A third slide rail is installed on each of the top two sides of the first slide plate along its length; the third extension mechanism includes a second slide plate, and the bottom two sides of the second slide plate are slidably connected to a third slide rail; the fourth synchronous belt module includes a transition shaft, a third clamping block, and a fourth clamping block; a first fixing block is also connected to one end of the bottom of the first slide plate located on one side of the first extension plate, and the transition shaft is rotatably connected between the first fixing block and the first extension plate; two second fixing blocks are also connected to the other end of the bottom of the first slide plate, the two second fixing blocks are arranged opposite each other, and the two second fixing blocks are positioned close to each other. It is also rotatably connected to a third fixed shaft; a first synchronous pulley is installed on the transition shaft, and a second synchronous pulley is also installed on the third fixed shaft, and a fourth transmission belt is wound between the first synchronous pulley and the second synchronous pulley; the third clamping block is connected to the upper side of the fourth transmission belt, and a second extension plate extends upward from the top of the third clamping block; a first sliding hole is opened at the top of the first slide plate along its length direction, and the second extension plate passes through the first sliding hole and is connected to the bottom of the second slide plate; the fourth clamping block is connected to the lower side of the fourth transmission belt, and one end of the fourth clamping block is connected to one side of one of the first side plates.

5. The synchronous belt stroke multiplier mechanism according to claim 4, characterized in that, A first tensioner is installed on one of the frame side plates above the first transmission belt; two second tensioners are installed on one of the first side plates above the second transmission belt, with an idler wheel located between the two second tensioners; a tension adjustment block is installed on the other end of each of the two frame side plates on opposite sides, and a first fixed shaft is rotatably connected between the two tension adjustment blocks.

6. The synchronous belt stroke multiplier mechanism according to claim 2, characterized in that, One side of one of the frame side panels is also equipped with a slotted sensor, and one end of the first side panel is also equipped with a sensing element that works in conjunction with the slotted sensor.

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