Ultrasonic heat riveting equipment

Abstract

The present invention discloses an ultrasonic heat riveting device, which relates to the field of ultrasonic heat riveting technology. The device comprises a rotating mechanism mounted on a frame for rotating products from a previous process to the next process, the rotating mechanism being equipped with a height adjustment mechanism for adjusting the height; a vibrating plate mounted on the frame for sequencing the disordered heat-riveted rivets; a loading and conveying mechanism mounted on the frame for conveying trays loaded with mica products to a loading station; a unloading and conveying mechanism mounted on the frame for transferring the heat-riveted mica products for unloading; and a limiting mechanism mounted on the frame via a storage rack for limiting the position of empty trays on the storage rack. By integrating the vibrating plate, loading and conveying mechanism, unloading and conveying mechanism, and ultrasonic heat riveting machine, the entire process, from rivet sorting, mica product loading, heat riveting processing, to unloading and stacking, is fully automated, significantly improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic heat riveting, in particular to an ultrasonic heat riveting device. Background Art

[0002] Ultrasonic heat riveting equipment is an advanced process that uses the combined effects of ultrasound and heat to join two or more metal parts. The device operates by transmitting high-frequency vibration waves generated by an ultrasonic vibrator to the surfaces of the metal parts to be joined. Under pressure, the two metal surfaces rub against each other, creating molecular fusion and ultimately welding. Ultrasonic heat riveting equipment offers advantages such as high speed, strong welds, aesthetically pleasing appearance, and a clean, pollution-free process. It is suitable for joining a wide variety of metal materials, such as aluminum, steel, and copper. Furthermore, it can connect metal parts of various shapes and sizes, making it widely used in aerospace, automotive, electronics, and other fields.

[0003] A hot riveting machine with publication number CN107009638A includes a workbench; a rotating device is provided on the workbench; the rotating device is arranged in a circular shape, and a mold pick-up and placement area, a flip device, a hot riveting device and a height measuring device are arranged on the workbench in sequence on the periphery of the rotating device according to the working process; a mold seat group is respectively provided on the rotating devices corresponding to the mold pick-up and placement area, the flip device, the hot riveting device and the height measuring device; the rotating device rotates the mold seat group to a certain working position and completes the operation, and then rotates to the next working position; the mold seat group includes a first mold seat and a second mold seat, which are respectively used to install a plastic box and a plastic cover, and the flip device can flip the plastic cover and cover the plastic box; the hot riveting device can melt the rivet column extending from the plastic cover on the plastic box to form a rivet head; the height measuring device is used to measure whether the exposed height of the rivet head meets the standard; the above-mentioned hot riveting machine can automatically assemble, hot rivet and automatically detect.

[0004] However, the implementation of the above patent still has the following problems. First, the hot riveting method often relies on a large amount of manual operation. From the installation of rivets, the loading and unloading of mica products to the hot riveting work, each link requires close manual cooperation, which not only leads to low production efficiency, but also increases production costs and the risk of human error. At the same time, the trays storing mica products are not sorted after use, resulting in the problem of empty trays piled up in a mess. Finally, due to the diverse thickness and specifications of mica products, traditional hot riveting equipment is often difficult to adapt to the thickness requirements of different products, resulting in the rivets not being able to fit well with the mica products during hot riveting, which in turn leads to poor hot riveting effect, affecting the quality and stability of the product. Summary of the Invention

[0005] In order to solve the problems raised by the above background technology, the present invention proposes an ultrasonic heat riveting device.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An ultrasonic heat riveting device, comprising a frame and an ultrasonic heat riveting machine, and also comprising

[0008] A rotating mechanism, mounted on the frame, is used to rotate the product from the previous process to the next process, and a height adjustment mechanism is installed on the rotating mechanism for adjusting the height;

[0009] The vibration plate is installed on the frame to arrange the disordered hot rivets in order;

[0010] The loading and conveying mechanism is installed on the frame and is used to transport the tray containing mica products to the loading station;

[0011] The unloading conveying mechanism is installed on the frame to transfer the mica products after hot riveting;

[0012] The limiting mechanism is installed on the frame through the storage rack and is used to limit the empty tray to the storage rack. A lifting mechanism for lifting the empty tray is provided below the limiting mechanism.

[0013] As a further preferred embodiment of the present technical solution: the jacking mechanism includes a No. 1 gear, the No. 1 gear is meshedly connected to the No. 2 gear, the No. 2 gear is fixedly connected to a connecting disc, a groove wheel is provided on one side of the connecting disc, and a toggle shaft for toggling the groove wheel to rotate is eccentrically provided on the connecting disc, the groove wheel is fixedly connected to a toggle frame, a trapezoidal block is fitted above the toggle frame, the upper end of the trapezoidal block is fixedly connected to a fixed shaft, the upper end of the fixed shaft is fixedly connected to a push plate, and a No. 1 return spring is sleeved on the outer side of the fixed shaft, and the No. 1 return spring is provided between the trapezoidal block and the frame.

[0014] As a further preferred embodiment of the present technical solution: a transmission mechanism for transmission is installed between the jacking mechanism and the unloading conveying mechanism;

[0015] The transmission mechanism includes a No. 1 pulley installed on the unloading conveying mechanism, the No. 1 pulley is connected to the No. 2 pulley through a transmission belt, the No. 2 pulley is fixedly connected to a transmission shaft, the transmission shaft is rotatably connected to the frame, and the end of the transmission shaft away from the No. 2 pulley is fixedly connected to the No. 1 gear.

[0016] As a further preferred embodiment of the present technical solution: the height adjustment mechanism includes a micro motor arranged on a support platform, the output end of the micro motor is fixedly connected to a No. 1 bevel gear, a No. 2 bevel gear is meshed on both sides of the No. 1 bevel gear, each of the No. 2 bevel gears is fixedly connected to a screw rod, and each of the screw rods is threadedly connected to a No. 2 wedge block.

[0017] As a further preferred embodiment of the present technical solution: a No. 1 slide groove is provided on the support platform, the No. 2 wedge block is slidably connected to the inside of the No. 1 slide groove, and a No. 2 slide groove is provided on the support platform, a sliding shaft is slidably connected to the inside of the No. 2 slide groove, and the upper end of the sliding shaft is fixedly connected to the placement platform.

[0018] As a further preferred embodiment of the present technical solution: a support block is fixedly connected to the support platform, and the screw rod is rotatably connected to the support block.

[0019] As a further preferred embodiment of the present technical solution: the limiting mechanism includes a No. 2 return spring fixedly connected to the storage rack, and the end of the No. 2 return spring away from the storage rack is fixedly connected to a No. 1 wedge block.

[0020] As a further preferred embodiment of the present technical solution: a No. 3 slide groove is provided on the storage rack, and the No. 1 wedge block is slidably connected to the No. 3 slide groove.

[0021] As a further preferred embodiment of the present technical solution: a No. 1 connecting shaft is fixedly connected to the No. 2 gear, the No. 1 connecting shaft is rotatably connected to the frame, a No. 2 connecting shaft is fixedly connected to the sheave, the No. 2 connecting shaft is rotatably connected to the frame, and the fixed shaft is slidably connected to the frame.

[0022] As a further preferred embodiment of the present technical solution: a robot mechanism is also installed on the frame, and the robot mechanism includes a rivet loading robot, a mica loading robot and a blanking robot. The rivet loading robot is installed next to the blanking conveying mechanism, and is used to place the rivets on the rotating mechanism. The mica loading robot is installed next to the loading conveying mechanism, and is used to grab the mica products on the loading conveying mechanism and place them on the rotating mechanism. The blanking robot is installed next to the blanking conveying mechanism, and is used to grab the mica products on the rotating mechanism and place them on the blanking conveying mechanism.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, by integrating the vibration plate, loading and conveying mechanism, unloading and conveying mechanism, and ultrasonic hot riveting machine into one, the whole process from rivet sorting, mica product loading, hot riveting processing to unloading and palletizing is realized, which significantly improves production efficiency, reduces manual intervention, and reduces production costs.

[0025] 2. In the present invention, by setting a lifting mechanism, the empty trays can be automatically lifted and stacked, and the limiting mechanism is used to limit the trays to the storage rack, which is convenient for staff to take them uniformly and improves the convenience of operation.

[0026] 3. In the present invention, by providing a height adjustment mechanism, the height of the support platform can be flexibly adjusted according to the thickness of the mica product, ensuring that the rivet and the mica product can fit tightly, thereby improving the hot riveting effect and enhancing the adaptability and application range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 ;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure at center A;

[0030] Figure 4 It is a partial structural cross-sectional view of the present invention;

[0031] Figure 5 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 ;

[0032] Figure 6 It is an exploded view of the local structure of the present invention;

[0033] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0034] Legend: 1. Frame; 2. Vibrating plate; 3. Rivet feeding robot; 4. Rotating mechanism; 5. Support platform; 51. Chute No. 1; 52. Chute No. 2; 6. Feeding and conveying mechanism; 7. Mica feeding robot; 9. Storage rack; 91. Chute No. 3; 10. Ultrasonic hot riveting machine; 11. Unloading robot; 12. Unloading and conveying mechanism; 13. Transmission mechanism; 131. Pulley No. 1; 132. Transmission belt; 133. Pulley No. 2; 134. Transmission shaft; 14. Lifting mechanism; 141. Gear No. 1; 142. Gear No. 2; 143 , connecting disc; 144, connecting shaft No. 1; 145, groove wheel; 146, toggle shaft; 147, connecting shaft No. 2; 148, toggle frame; 149, trapezoidal block; 1410, fixed shaft; 1411, push plate; 1413, return spring No. 1; 15, limiting mechanism; 151, wedge block No. 1; 152, return spring No. 2; 16, height adjustment mechanism; 161, micro motor; 162, bevel gear No. 1; 163, bevel gear No. 2; 164, support block; 165, screw rod; 166, wedge block No. 2; 167, placement table; 168, sliding shaft. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1-Figure 7 The present application provides an ultrasonic hot riveting device, comprising a frame 1 and an ultrasonic hot riveting machine 10. The ultrasonic hot riveting machine 10 is an existing technology and performs hot riveting on mica products. It also includes a rotating mechanism 4. It should be noted that the rotating mechanism 4 includes a driving motor and a turntable. The output end of the driving motor is fixedly connected to the turntable, and the rotating disk is rotatably connected to the frame 1, and is used to rotate the product of the previous process to the next process. The rotating mechanism 4 is equipped with a height adjustment mechanism 16 for adjusting the height; the vibration plate 2 is installed on the frame 1 to sequence the disordered hot riveted rivets; the loading and conveying mechanism 6 is installed on the frame 1 to convey the tray containing mica products to the loading station; the unloading and conveying mechanism 12 is installed on the frame 1 to transfer the mica products after hot riveting; the limiting mechanism 15 is installed on the frame 1 through the storage rack 9 to limit the empty tray to the storage rack 9, and a lifting mechanism 14 for lifting the empty tray is provided below the limiting mechanism 15;

[0038] The lifting mechanism 14 includes a No. 1 gear 141, which is meshed with a No. 2 gear 142. It should be noted that the radius of the No. 2 gear 142 is much larger than the size of the No. 1 gear 141, and the sizes of the two can be designed according to actual needs. That is, after the mica loading robot 7 completely removes the mica products on the Tray, the loading conveyor mechanism 6 sends the empty Tray to the stacking area. At this time, the toggle shaft 146 is rotated into the groove of the groove wheel 145, and the 145 is rotated. The No. 2 gear 142 is fixedly connected to the connecting disc 14 3. A sheave 145 is provided on one side of the connecting disc 143, and a toggle shaft 146 for toggle the sheave 145 is eccentrically provided on the connecting disc 143. A toggle frame 148 is fixedly connected to the sheave 145. A trapezoidal block 149 is fitted above the toggle frame 148. A fixed shaft 1410 is fixedly connected to the upper end of the trapezoidal block 149. A push plate 1411 is fixedly connected to the upper end of the fixed shaft 1410. A return spring 1413 is sleeved on the outer side of the fixed shaft 1410. The return spring 1413 is provided between the trapezoidal block 149 and the frame 1.

[0039] Specifically, the transmission mechanism 13 drives the No. 1 gear 141 to rotate, the No. 1 gear 141 drives the No. 2 gear 142 to rotate, the No. 2 gear 142 drives the connecting disc 143 to rotate around the No. 1 connecting shaft 144, the connecting disc 143 drives the toggle shaft 146 thereon to rotate and toggle the groove wheel 145 to rotate, the groove wheel 145 drives the toggle frame 148 to rotate, the rotation of the toggle frame 148 lifts the trapezoidal block 149, the trapezoidal block 149 drives the fixed shaft 1410 thereon to slide through the frame 1, and drives the No. 1 connecting shaft 144 downward to lift the empty trays in sequence, and the No. 1 reset spring 1413 is used for reset.

[0040] A transmission mechanism 13 for transmission is installed between the jacking mechanism 14 and the unloading conveying mechanism 12. It should be noted that the conveying mechanism 12 is a prior art, which is generally composed of two support shafts and a conveyor belt, and the No. 1 pulley 131 can be installed on any one of the support shafts. When the support shaft rotates, it can drive the No. 1 pulley 131 to rotate. The transmission mechanism 13 includes a No. 1 pulley 131 installed on the unloading conveying mechanism 12, and the No. 1 pulley 131 is connected to the No. 2 pulley 133 through a transmission belt 132. The No. 2 pulley 133 is fixedly connected to a transmission shaft 134, and the transmission shaft 134 is rotatably connected to the frame 1, and the end of the transmission shaft 134 away from the No. 2 pulley 133 is fixedly connected to the No. 1 gear 141.

[0041] Specifically, during the process of the unloading conveying mechanism 12 conveying the mica products after hot riveting, the support shaft cooperating with the conveyor belt will also rotate, thereby driving the No. 1 pulley 131 to rotate, and the No. 1 pulley 131 drives the No. 2 pulley 133 to rotate through the transmission belt 132, and the No. 2 pulley 133 drives the transmission shaft 134 to rotate, thereby driving the No. 1 gear 141 to rotate, which also drives the lifting mechanism 14 to lift up and lift the empty tray on the mica loading robot 7 to stack, ensuring the neatness of the tray after use and facilitating the staff to take it uniformly.

[0042] The second gear 142 is fixedly connected to the first connecting shaft 144, which is rotatably connected to the frame 1. The grooved wheel 145 is fixedly connected to the second connecting shaft 147, which is rotatably connected to the frame 1, and the fixed shaft 1410 is slidably connected to the frame 1.

[0043] A robotic mechanism is also installed on the frame 1, and the robotic mechanism includes a rivet loading robot 3, a mica loading robot 7 and a blanking robot 11. The rivet loading robot 3 is installed next to the blanking conveying mechanism 12, and is used to place the rivets on the rotating mechanism 4. The mica loading robot 7 is installed next to the loading conveying mechanism 6, and is used to grab the mica products on the loading conveying mechanism 6 and place them on the rotating mechanism 4. The blanking robot 11 is installed next to the blanking conveying mechanism 12, and is used to grab the mica products on the rotating mechanism 4 and place them on the blanking conveying mechanism 12. The robotic mechanisms are all existing products, so only they are used.

[0044] Example 2

[0045] On the basis of Example 1, the height adjustment mechanism 16 includes a micro motor 161 arranged on the support platform 5, the output end of the micro motor 161 is fixedly connected to the No. 1 bevel gear 162, and a No. 2 bevel gear 163 is meshed on both sides of the No. 1 bevel gear 162, and each No. 2 bevel gear 163 is fixedly connected to a screw rod 165, and each screw rod 165 is threadedly connected to a No. 2 wedge block 166, a No. 1 slide 51 is provided on the support platform 5, the No. 2 wedge block 166 is slidably connected to the inside of the No. 1 slide 51, and a No. 2 slide 52 is provided on the support platform 5, and a sliding shaft 168 is slidably connected to the inside of the No. 2 slide 52, and the upper end of the sliding shaft 168 is fixedly connected to the placement platform 167, and a support block 164 is fixedly connected to the support platform 5, and the screw rod 165 is rotatably connected to the support block 164.

[0046] Specifically, by starting the micro motor 161 to drive the No. 1 bevel gear 162 to rotate, the No. 1 bevel gear 162 drives the two No. 2 bevel gears 163 to rotate, and each No. 2 bevel gear 163 drives the screw rod 165 thereon to rotate. The rotation of the screw rod 165 causes the two No. 2 wedge blocks 166 to slide along the No. 1 slide groove 51 on the support platform 5. Because the top of the No. 2 wedge block 166 is an inclined surface, the placement platform 167 above it can be lifted or lowered, and the sliding shaft 168 plays a guiding and connecting role. At this point, before the mica product is placed on the rotating mechanism 4 by the mica loading robot 7, the height of the placement platform 167 is adjusted to adapt to the thickness of the mica sheet. For example, when the thickness of the mica product is thin, the placement platform 167 is raised higher to prevent the rivet and the mica product from not fitting well when the ultrasonic hot riveting machine 10 is used to hot rivet, thereby affecting the hot riveting effect.

[0047] Example 3

[0048] On the basis of embodiment one, the limiting mechanism 15 includes a No. 2 return spring 152 fixedly connected to the storage rack 9, and the end of the No. 2 return spring 152 away from the storage rack 9 is fixedly connected to the No. 1 wedge block 151, and a No. 3 slide groove 91 is provided on the storage rack 9, and the No. 1 wedge block 151 is slidably connected to the No. 3 slide groove 91.

[0049] Specifically, when the lifting mechanism 14 lifts the empty tray, the tray first fits against the inclined surface of the No. 1 wedge block 151 and is squeezed into the interior of the No. 3 slide 91. During this process, the No. 2 return spring 152 is compressed. When the tray is higher than the height of the No. 1 wedge block 151, the No. 1 wedge block 151 is ejected under the action of the elastic force of the No. 2 return spring 152, and the tray limit card is stuck above the No. 1 wedge block 151, which is convenient for the staff to take it together.

[0050] In summary, the staff first puts the rivets into the vibration plate 2, which vibrates and sorts the rivets. The rivet feeding robot 3 takes the rivets and places them on the top of the support table 5, that is, on the placement table 167. Then, the mica products stacked in the tray are placed on the feeding conveyor mechanism 6. Then, the mica feeding robot 7 places the mica products one by one on the rotating mechanism 4. Then, the rotating mechanism 4 transfers the mica products with rivets to the bottom of the corresponding ultrasonic hot riveting machine 10, and presses the rivets down according to the set requirements through the head of the ultrasonic hot riveting machine 10. Press the mica product, then the rotating mechanism 4 rotates the final riveted product to the bottom of the unloading robot 11, and then the unloading robot 11 unloads the product to the unloading conveying mechanism 12, and so on. Finally, after the mica loading robot 7 takes out the mica products in the tray, the loading conveying mechanism 6 sends the empty tray to the top of the lifting mechanism 14. At this time, the lifting mechanism 14 lifts the empty tray for stacking. The whole process is automated, which significantly improves production efficiency, reduces manual intervention, and reduces production costs.

[0051] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An ultrasonic heat riveting device, comprising a frame (1), a support platform (5) and an ultrasonic heat riveting machine (10), characterized in that: Also includes A rotating mechanism (4) is mounted on the frame (1) and is used to rotate the product of the previous process to the next process. The rotating mechanism (4) is equipped with a height adjustment mechanism (16) for adjusting the height of the support platform (5); A vibration plate (2) is mounted on the frame (1) to arrange the disordered hot rivets in sequence; A loading and conveying mechanism (6), mounted on the frame (1), is used to convey a tray containing mica products to a loading station; A material feeding and conveying mechanism (12) is mounted on the frame (1) and is used to feed the mica product after hot riveting; A limiting mechanism (15) is mounted on the frame (1) via the storage rack (9) and is used to limit the empty tray to the storage rack (9). A lifting mechanism (14) is provided below the limiting mechanism (15) for lifting the empty tray. The lifting mechanism (14) includes a first gear (141), the first gear (141) is meshedly connected to a second gear (142), the second gear (142) is fixedly connected to a connecting disc (143), a groove wheel (145) is provided on one side of the connecting disc (143), and a toggle shaft (146) for toggle the groove wheel (145) is eccentrically provided on the connecting disc (143), and the groove wheel (145) is fixedly connected to the connecting disc (143). A toggle frame (148) is connected, a trapezoidal block (149) is fitted on the toggle frame (148), an upper end of the trapezoidal block (149) is fixedly connected to a fixed shaft (1410), an upper end of the fixed shaft (1410) is fixedly connected to a push plate (1411), and a No. 1 return spring (1413) is sleeved on the outer side of the fixed shaft (1410), and the No. 1 return spring (1413) is arranged between the trapezoidal block (149) and the frame (1); A transmission mechanism (13) for transmission is installed between the lifting mechanism (14) and the material feeding and conveying mechanism (12); The transmission mechanism (13) includes a first pulley (131) installed on the unloading conveying mechanism (12), the first pulley (131) is connected to a second pulley (133) via a transmission belt (132), a transmission shaft (134) is fixedly connected to the second pulley (133), the transmission shaft (134) is rotatably connected to the frame (1), and an end of the transmission shaft (134) away from the second pulley (133) is fixedly connected to the first gear (141); A manipulator mechanism is also installed on the frame (1), and the manipulator mechanism includes a rivet loading manipulator (3), a mica loading manipulator (7) and a blanking manipulator (11). The rivet loading manipulator (3) is installed next to the blanking conveying mechanism (12) and is used to place rivets on the rotating mechanism (4). The mica loading manipulator (7) is installed next to the loading conveying mechanism (6) and is used to grab the mica product on the loading conveying mechanism (6) and place it on the rotating mechanism (4). The blanking manipulator (11) is installed next to the blanking conveying mechanism (12) and is used to grab the mica product on the rotating mechanism (4) and place it on the blanking conveying mechanism (12).

2. The ultrasonic heat riveting equipment according to claim 1, characterized in that: The height adjustment mechanism (16) includes a micro motor (161) arranged on the support platform (5), the output end of the micro motor (161) is fixedly connected to a first bevel gear (162), and a second bevel gear (163) is meshed on both sides of the first bevel gear (162), and each of the second bevel gears (163) is fixedly connected to a screw rod (165), and each of the screw rods (165) is threadedly connected to a second wedge block (166).

3. The ultrasonic heat riveting equipment according to claim 2, characterized in that: The support platform (5) is provided with a No. 1 slide groove (51), the No. 2 wedge block (166) is slidably connected inside the No. 1 slide groove (51), and the support platform (5) is provided with a No. 2 slide groove (52), the No. 2 slide groove (52) is slidably connected to a slide shaft (168), and the upper end of the slide shaft (168) is fixedly connected to a placement platform (167).

4. The ultrasonic heat riveting equipment according to claim 3, characterized in that: A support block (164) is fixedly connected to the support platform (5), and the screw rod (165) is rotatably connected to the support block (164).

5. The ultrasonic heat riveting equipment according to claim 1, characterized in that: The limiting mechanism (15) includes a No. 2 return spring (152) fixedly connected to the storage rack (9), and an end of the No. 2 return spring (152) away from the storage rack (9) is fixedly connected to a No. 1 wedge block (151).

6. The ultrasonic heat riveting equipment according to claim 5, characterized in that: A No. 3 chute (91) is provided on the storage rack (9), and the No. 1 wedge block (151) is slidably connected to the No. 3 chute (91).

7. The ultrasonic heat riveting equipment according to claim 1, characterized in that: The second gear (142) is fixedly connected to a first connecting shaft (144), the first connecting shaft (144) is rotatably connected to the frame (1), the groove wheel (145) is fixedly connected to a second connecting shaft (147), the second connecting shaft (147) is rotatably connected to the frame (1), and the fixed shaft (1410) is slidably connected to the frame (1).

Images