A device for crushing building concrete blocks

Abstract

The present invention discloses a construction concrete block crushing device, belonging to the technical field of construction equipment. A construction concrete block crushing device includes a first support seat, and also includes: a working box, the working box is fixedly arranged on the top of the first support seat, a feeding chamber and a crushing chamber are arranged in the working box, a breaking mechanism and a pushing mechanism are arranged in the crushing chamber, a partition for adjusting the falling position of concrete blocks is connected to the working box by a rotating shaft, and the partition is used to separate the feeding chamber and the crushing chamber; a crushing channel, the crushing channel is fixedly arranged obliquely on the side of the working box and is interconnected with the crushing chamber, and a crushing mechanism for crushing concrete blocks is arranged in the crushing channel; the present invention makes the concrete blocks evenly spread, which is convenient for ensuring the crushing effect of the concrete blocks, and through the multi-stage crushing treatment of large concrete blocks by small and medium-sized power equipment, the effect of completely crushing the concrete blocks can be completed without using large-scale power crushing equipment, thereby improving the crushing efficiency of construction concrete blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and particularly to a building concrete block crushing device. Background Art

[0002] Concrete refers to the general term for engineering composite materials in which binders bond aggregates into a whole. Usually, the term "concrete" refers to cement concrete, which uses cement as the binder, sand and stone as aggregates; it is mixed with water (which may contain additives and admixtures) in a certain proportion and obtained by stirring. It is also called ordinary concrete and is widely used in civil engineering. In building construction, some discarded concrete blocks are often seen. These concrete blocks will affect subsequent projects and can be re-crushed for secondary use in filling layers such as foundations.

[0003] When the existing building concrete block crushing equipment is in use, the concrete blocks generally fall from the feeding port to the same position, resulting in poor crushing effect and long crushing time for the concrete blocks piled up together; at the same time, since the crushing equipment generally crushes the soil blocks by pressing or hammering, when the concrete blocks are relatively large in volume, it requires too much dynamic potential energy of the crushing equipment, and some small and medium-sized power equipment cannot meet the crushing use requirements. And the large-power crushing equipment has high cost and small application volume, resulting in limited crushing efficiency of building concrete blocks. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a building concrete block crushing device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A building concrete block crushing device, including a first support base, further including:

[0007] A working box, which is fixedly arranged on the top of the first support base. An inlet cavity and a crushing cavity are arranged in the working box. A cracking mechanism and a pushing mechanism are arranged in the crushing cavity. A partition for adjusting the falling position of the concrete blocks is rotatably connected to the working box through a rotating shaft. The partition is used to separate the inlet cavity and the crushing cavity;

[0008] A crushing channel, which is obliquely fixedly arranged on the side of the working box and communicates with the crushing cavity. A crushing mechanism for crushing concrete blocks is arranged in the crushing channel; and

[0009] A grinding box, which is fixedly arranged at the bottom end of the crushing channel and communicates with the crushing channel, and is used for rubbing and crushing the concrete blocks. A second support base is arranged at the bottom of the grinding box.

[0010] Preferably, the rupturing mechanism includes a support fixed on the working box, a first hydraulic cylinder is arranged on the support, a piston rod of the first hydraulic cylinder is connected to a mounting plate, the mounting plate is slidably connected in the crushing chamber, and a plurality of piercing rods for rupturing concrete blocks are arranged at the bottom of the mounting plate.

[0011] Preferably, a driving motor for driving the puncture rod to rotate is fixedly disposed in the mounting plate, and a drill bit is disposed at the end of the puncture rod.

[0012] Preferably, the pushing mechanism comprises a first support plate fixed on the working box, a screw rod is rotatably connected to the first support plate, a threaded tube is threadedly connected to the screw rod, and a pushing plate is connected to one end of the threaded tube away from the screw rod.

[0013] Preferably, the pushing mechanism also includes a second support plate fixedly mounted on the working box, a transmission rod is rotatably connected to the second support plate, synchronous wheels are provided on the transmission rod and the screw rod, a synchronous belt is provided between the two synchronous wheels, a driven gear is provided on the transmission rod, a slide plate slidably connected to the working box is fixedly mounted on the mounting plate, and a rack plate meshing with the driven gear is provided on the slide plate.

[0014] Preferably, a connecting plate is fixedly provided on the slide plate, an end of the connecting plate away from the slide plate is movably connected to an elastic telescopic plate, and an end of the elastic telescopic plate away from the slide plate is fixedly connected to the rotating shaft.

[0015] Preferably, the crushing mechanism comprises rotating rods equidistantly arranged in the crushing channel, the swing rods on two adjacent rotating rods are staggered, the rotating rod is provided with a swing rod, and a crushing hammer is provided at one end of the swing rod away from the rotating rod.

[0016] Preferably, a third support plate is fixedly provided on the outer side of the crushing channel, a connecting rod is provided on the third support plate, a second transmission gear and an active bevel gear are provided on the connecting rod, a first transmission gear meshing with the second transmission gear is provided at the end of the transmission rod, and a driven bevel gear meshing with the active bevel gear is provided at the end of the rotating rod.

[0017] Preferably, a filter plate is rotatably connected in the crushing box, a discharge port is provided at the bottom of the crushing box, a second hydraulic cylinder is fixedly provided on the crushing box, and a piston rod of the second hydraulic cylinder passes through the crushing box and is connected to a crushing block.

[0018] Preferably, the piston rod of the second hydraulic cylinder passes through the filter plate and extends downward to be connected to a fixed rod, a rotating tube is sleeved on the outer side of the fixed rod, the rotating tube is fixedly connected to the filter plate and rotatably connected to the crushing box, a guide block is fixedly provided on the inner wall of the rotating tube, and a spiral guide groove for the movement of the guide block is opened on the fixed rod.

[0019] Compared with the prior art, the present invention provides a construction concrete block crushing device, which has the following beneficial effects:

[0020] 1. The construction concrete block crushing device can evenly lower the concrete blocks to be crushed by setting partitions and rotating filter plates, avoiding the accumulation of concrete blocks in one place and affecting the overall crushing effect of the concrete blocks, thereby ensuring the crushing effect of the concrete blocks.

[0021] 2. The construction concrete block crushing device uses small and medium-sized power equipment to perform multi-stage crushing of large concrete blocks. It can completely crush the concrete blocks without using large-scale power crushing equipment, thereby improving the crushing efficiency of construction concrete blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the middle part;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of the middle B part;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure of the middle C part;

[0027] Figure 6 For the present invention Figure 4 The schematic diagram of the partial enlarged structure of the middle D part;

[0028] Figure 7 It is a schematic diagram of the structure of the rupture mechanism of the present invention when it is working;

[0029] Figure 8 It is a schematic diagram of the structure of the two ends of the puncture rod of the present invention;

[0030] Fig. 9 It is a schematic diagram of the external structure of the rotating rod of the present invention;

[0031] Fig.10 It is a schematic cross-sectional structure diagram of a crushing box of the present invention;

[0032] Fig.11 It is a schematic diagram of the external structure of the fixing rod of the present invention.

[0033] In the figure: 1. first support seat; 2. working box; 201. feeding chamber; 202. crushing chamber; 203. rotating shaft; 204. partition; 3. crushing channel; 4. crushing box; 401. filter plate; 402. discharge port; 5. second support seat; 6. support seat; 601. first hydraulic cylinder; 602. mounting plate; 6021. slide plate; 6022. rack plate; 603. piercing rod; 6031. drill bit; 604. driving motor; 7. first support plate; 701. screw rod; 702. threaded pipe; 703. push plate; 8. Second support plate; 801. Transmission rod; 8011. First transmission gear; 802. Driven gear; 9. Connecting plate; 901. Elastic expansion plate; 10. Synchronous wheel; 11. Rotating rod; 111. Swinging rod; 112. Breaking hammer; 113. Driven bevel gear; 12. Third support plate; 121. Second transmission gear; 122. Active bevel gear; 123. Connecting rod; 13. Second hydraulic cylinder; 131. Crushing block; 14. Fixed rod; 141. Spiral guide groove; 15. Rotating tube; 151. Guide block. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Example 1: Reference Figure 1 , Figure 3 , Figure 7 and Fig.10 , a construction concrete block crushing device, comprising a first support seat 1, and further comprising:

[0037] The working box 2 is fixedly arranged on the top of the first supporting seat 1. A feeding chamber 201 and a crushing chamber 202 are arranged in the working box 2. A breaking mechanism and a pushing mechanism are arranged in the crushing chamber 202. A partition plate 204 for adjusting the falling position of the concrete block is rotatably connected to the working box 2 through a rotating shaft 203. The partition plate 204 is used to separate the feeding chamber 201 and the crushing chamber 202.

[0038] A crushing channel 3, which is obliquely fixed on the side of the working box 2 and communicates with the crushing chamber 202, and a crushing mechanism for crushing concrete blocks is arranged in the crushing channel 3; and

[0039] The crushing box 4 is fixedly arranged at the bottom end of the crushing channel 3 and is communicated with the crushing channel 3 , and is used for kneading and crushing the concrete blocks. A second supporting seat 5 is arranged at the bottom of the crushing box 4 .

[0040] Specifically, during operation, some concrete blocks to be crushed are poured from the top of the feed chamber 201, and the concrete blocks to be crushed fall on the partition 204, and then the crushing mechanism is controlled to work. When the crushing mechanism works, it drives the partition 204 to flip and the pushing mechanism to reset. The partition 204 no longer separates the feed chamber 201 and the crushing chamber 202. As the partition 204 flips, the concrete blocks to be crushed placed on the partition 204 automatically fall to the bottom of the crushing chamber 202, and the concrete blocks are evenly lowered from the end close to the crushing channel 3 to the end away from the crushing channel 3. The crushing mechanism punctures and breaks the evenly lowered concrete blocks, and then the crushing mechanism is controlled to reset, and the crushing mechanism drives the partition 204 to reset, and the pushing mechanism pushes the concrete blocks broken by the crushing mechanism into the crushing channel 3. The concrete blocks entering the crushing channel 3 are crushed again by the crushing mechanism, and then the concrete blocks enter the crushing box 4 and are rubbed and crushed, and finally the concrete blocks to be crushed are put into the feed chamber 201 again for crushing.

[0041] The present application ensures the crushing effect of concrete blocks by spreading the concrete blocks evenly, and uses small and medium-sized power equipment to perform multi-stage crushing of large concrete blocks. It is possible to completely crush the concrete blocks without using large-scale power crushing equipment, thereby improving the crushing efficiency of building concrete blocks.

[0042] Example 2: Reference Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 A building concrete block crushing device, based on Example 1, further, the crushing mechanism includes a support 6 fixedly mounted on the working box 2, a first hydraulic cylinder 601 is arranged on the support 6, the piston rod of the first hydraulic cylinder 601 is connected to a mounting plate 602, the mounting plate 602 is slidably connected in the crushing chamber 202, and a plurality of piercing rods 603 for crushing concrete blocks are arranged at the bottom of the mounting plate 602.

[0043] Specifically, when the rupture mechanism is working, the first hydraulic cylinder 601 is controlled to work, and the piston rod of the first hydraulic cylinder 601 drives the mounting plate 602 to move downward, and the mounting plate 602 drives the piercing rod 603 to move downward, thereby piercing the concrete blocks evenly placed at the bottom of the crushing chamber 202, ensuring that each concrete block is pierced smoothly. After the large concrete blocks are pierced, holes appear in the internal structure of the large concrete blocks, and the overall density of the concrete blocks decreases, reducing the stability of the structure of the large concrete blocks. At the same time, the large concrete blocks are prone to cracking when being pierced, further reducing the stability of the concrete block structure, making it easier to crush the concrete blocks.

[0044] Example 3: Reference Figure 7 and Figure 8 , a construction concrete block crushing device, based on Example 2, further, a driving motor 604 for driving a piercing rod 603 to rotate is fixedly provided in a mounting plate 602, and a drill bit 6031 is provided at the end of the piercing rod 603.

[0045] Specifically, when the mounting plate 602 drives the piercing rod 603 to move downward, the driving motor 604 is controlled to run at the same time, and the output shaft of the driving motor 604 drives the piercing rod 603 to rotate, so that the piercing rod 603 uses the drill bit 6031 at the bottom to smoothly pierce and drill a hole in the lower concrete block, thereby preventing the piercing rod 603 from being directly and rigidly inserted into the concrete block, causing damage to the piercing rod 603.

[0046] Example 4: Reference Figure 1-7 , a building concrete block crushing device, based on Example 3, further, the pushing mechanism includes a first support plate 7 fixedly mounted on the working box 2, the first support plate 7 is rotatably connected to a screw rod 701, the screw rod 701 is threadedly connected to a threaded tube 702, and the end of the threaded tube 702 away from the screw rod 701 is connected to a pushing plate 703.

[0047] Furthermore, the pushing mechanism also includes a second support plate 8 fixedly mounted on the working box 2, a transmission rod 801 is rotatably connected to the second support plate 8, a synchronous wheel 10 is provided on the transmission rod 801 and the screw rod 701, a synchronous belt is provided between the two synchronous wheels 10, a driven gear 802 is provided on the transmission rod 801, a slide plate 6021 slidably connected to the working box 2 is fixedly mounted on the mounting plate 602, and a rack plate 6022 meshing with the driven gear 802 is provided on the slide plate 6021.

[0048] Specifically, when the rupturing mechanism is working, it drives the pushing mechanism to move at the same time. When the piercing rod 603 moves downward, the rack plate 6022 on the slide plate 6021 connected to the outside of the mounting plate 602 meshes with the driven gear 802 for transmission, and the driven gear 802 drives the transmission rod 801 to rotate. When the transmission rod 801 rotates, it drives the screw 701 to rotate in the working box 2 through the synchronous wheel 10 and the synchronous belt. When the screw 701 rotates, the threaded tube 702 threadedly connected thereto drives the pushing plate 703 to move horizontally in the working box 2, so that the pushing plate 703 is away from the crushing channel 3; and when the piercing rod 603 moves upward, the rack plate 6022 meshes with the driven gear 802 in the opposite direction, so that the threaded tube 702 is relatively away from the screw 701, so that the threaded tube 702 drives the pushing plate 703 to push the concrete block pierced and ruptured by the piercing rod 603, so that the concrete block enters the crushing channel 3 through the crushing chamber 202.

[0049] Example 5: Reference Figure 1 , Figure 3 , Figure 7 and Fig.10 , a building concrete block crushing device, based on Example 4, further, a connecting plate 9 is fixedly provided on the slide plate 6021, and an end of the connecting plate 9 away from the slide plate 6021 is movably connected to an elastic telescopic plate 901, and an end of the elastic telescopic plate 901 away from the slide plate 6021 is fixedly connected to the rotating shaft 203.

[0050] Specifically, when the crushing mechanism is working, the first hydraulic cylinder 601 is controlled to work, and the piston rod of the first hydraulic cylinder 601 drives the mounting plate 602 to move downward, and the mounting plate 602 drives the slide plate 6021 connected thereto to move downward, and the slide plate 6021 drives the connecting plate 9 to move downward, and the connecting plate 9 applies a thrust to the elastic telescopic plate 901, and the elastic telescopic plate 901 drives the rotating shaft 203 to rotate, and the rotating shaft 203 drives the partition 204 to flip, and in this process, the elastic telescopic plate 901 automatically stretches and deforms, and the concrete block is evenly lowered from the end close to the crushing channel 3 to the end away from the crushing channel 3.

[0051] Example 6: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 9 A construction concrete block crushing device, based on Example 5, further, the crushing mechanism includes a rotating rod 11 equidistantly arranged in the crushing channel 3, a swing rod 111 is arranged on the rotating rod 11, the swing rods 111 on two adjacent rotating rods 11 are staggered, and a breaker hammer 112 is arranged at one end of the swing rod 11 away from the rotating rod 11.

[0052] Furthermore, a third support plate 12 is fixedly provided on the outer side of the crushing channel 3, a connecting rod 123 is provided on the third support plate 12, a second transmission gear 121 and an active bevel gear 122 are provided on the connecting rod 123, a first transmission gear 8011 meshing with the second transmission gear 121 is provided at the end of the transmission rod 801, and a driven bevel gear 113 meshing with the active bevel gear 122 is provided at the end of the rotating rod 11.

[0053] Specifically, when the transmission rod 801 rotates, the first transmission gear 8011 at the end is meshed with the second transmission gear 121 on the connecting rod 123 for transmission, and the second transmission gear 121 drives the connecting rod 123 to rotate. When the connecting rod 123 rotates, the outer active bevel gear 122 is meshed with the driven bevel gear 113 on the rotating rod 11 for transmission. When the rotating rod 11 rotates, the swing rod 111 drives the breaker 112 to knock on the concrete blocks that have been perforated and broken. The positions of the swing rods 111 on the two adjacent rotating rods 11 are staggered, so that the breaker 112 knocks on the concrete blocks at different positions, so that the concrete blocks whose overall structure is no longer stable are quickly broken, thereby ensuring the crushing effect and efficiency of the concrete blocks.

[0054] Example 7: Reference Figure 1 , Figure 4 , Fig.10 and Fig.11 , a building concrete block crushing device, based on Example 6, further, a filter plate 401 is rotatably connected in the crushing box 4, a discharge port 402 is provided at the bottom of the crushing box 4, a second hydraulic cylinder 13 is fixed on the crushing box 4, and a piston rod of the second hydraulic cylinder 13 passes through the crushing box 4 and is connected to a crushing block 131.

[0055] Furthermore, the piston rod of the second hydraulic cylinder 13 passes through the filter plate 401 and extends downward to be connected to the fixed rod 14. A rotating tube 15 is sleeved on the outer side of the fixed rod 14. The rotating tube 15 is fixedly connected to the filter plate 401 and is rotatably connected to the crushing box 4. A guide block 151 is fixedly provided on the inner wall of the rotating tube 15. A spiral guide groove 141 is opened on the fixed rod 14 for the movement of the guide block 151.

[0056] Specifically, the concrete block falling from the crushing channel 3 falls on the filter plate 401 in the crushing box 4. By controlling the operation of the second hydraulic cylinder 13, the piston rod of the second hydraulic cylinder 13 drives the crushing block 131 to move downward, and the crushing block 131 presses down the concrete block on the filter plate 401 to crush it. When the piston rod of the second hydraulic cylinder 13 moves downward, the fixed rod 14 moves downward synchronously, and the spiral guide groove 141 on the fixed rod 14 cooperates with the guide block 151 on the rotating tube 15, so that the rotating tube 15 rotates with the upward and downward movement of the fixed rod 14 , and then the rotating tube 15 drives the filter plate 401 to rotate in the crushing box 4. The rotation of the filter plate 401 can orderly receive the concrete blocks falling from the crushing channel 3, so that all parts of the filter plate 401 can receive concrete blocks. As the crushing blocks 131 continue to move downward, the vertically downward moving crushing blocks 131 cooperate with the rotating filter plate 401, and then the crushing blocks 131 rub and crush the concrete blocks evenly placed on the filter plate 401, thereby ensuring the crushing effect of the concrete blocks. The crushed concrete blocks pass through the filter plate 401 and are discharged from the discharge port 402.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction concrete block crushing device, comprising a first support seat (1), characterized in that: Also includes: A working box (2), the working box (2) being fixedly mounted on the top of the first support seat (1), the working box (2) being provided with a feeding chamber (201) and a crushing chamber (202), the crushing chamber (202) being provided with a crushing mechanism and a pushing mechanism, a partition (204) for adjusting the falling position of the concrete block being rotatably connected to the working box (2) via a rotating shaft (203), the partition (204) being used to separate the feeding chamber (201) and the crushing chamber (202); a crushing channel (3), the crushing channel (3) being fixedly arranged at an angle on the side of the working box (2) and being in communication with the crushing chamber (202), wherein a crushing mechanism for crushing concrete blocks is arranged in the crushing channel (3); and A crushing box (4), the crushing box (4) being fixedly arranged at the bottom end of the crushing channel (3) and being connected to the crushing channel (3), and being used for kneading and crushing the concrete blocks, and a second support seat (5) being arranged at the bottom of the crushing box (4); The rupturing mechanism comprises a support (6) fixedly mounted on the working box (2); a first hydraulic cylinder (601) is arranged on the support (6); a piston rod of the first hydraulic cylinder (601) is connected to a mounting plate (602); the mounting plate (602) is slidably connected in the crushing chamber (202); a plurality of piercing rods (603) for rupturing concrete blocks are arranged at the bottom of the mounting plate (602); The push mechanism comprises a first support plate (7) fixedly mounted on the working box (2), a screw rod (701) being rotatably connected to the first support plate (7), a threaded tube (702) being threadedly connected to the screw rod (701), and a push plate (703) being connected to one end of the threaded tube (702) away from the screw rod (701); The pushing mechanism further comprises a second support plate (8) fixedly mounted on the working box (2), a transmission rod (801) being rotatably connected to the second support plate (8), a synchronous wheel (10) being arranged on both the transmission rod (801) and the screw rod (701), a synchronous belt being arranged between the two synchronous wheels (10), a driven gear (802) being arranged on the transmission rod (801), a slide plate (6021) being slidably connected to the working box (2) being fixedly mounted on the mounting plate (602), and a rack plate (6022) being meshed with the driven gear (802) being arranged on the slide plate (6021); The slide plate (6021) is fixedly provided with a connecting plate (9), one end of the connecting plate (9) away from the slide plate (6021) is movably connected to an elastic expansion plate (901), and one end of the elastic expansion plate (901) away from the slide plate (6021) is fixedly connected to the rotating shaft (203); A filter plate (401) is rotatably connected in the crushing box (4), a discharge port (402) is provided at the bottom of the crushing box (4), a second hydraulic cylinder (13) is fixedly provided on the crushing box (4), and a piston rod of the second hydraulic cylinder (13) passes through the crushing box (4) and is connected to a crushing block (131); The piston rod of the second hydraulic cylinder (13) passes through the filter plate (401) and extends downward to be connected to a fixed rod (14); a rotating tube (15) is sleeved on the outer side of the fixed rod (14); the rotating tube (15) is fixedly connected to the filter plate (401) and is rotatably connected to the crushing box (4); a guide block (151) is fixedly provided on the inner wall of the rotating tube (15); and a spiral guide groove (141) for the guide block (151) to move is provided on the fixed rod (14).

2. A construction concrete block crushing device according to claim 1, characterized in that: A driving motor (604) for driving the puncture rod (603) to rotate is fixedly disposed in the mounting plate (602), and a drill bit (6031) is disposed at the end of the puncture rod (603).

3. A construction concrete block crushing device according to claim 2, characterized in that: The crushing mechanism comprises rotating rods (11) equidistantly arranged in the crushing channel (3), the rotating rods (11) being provided with swing rods (111), the swing rods (111) on two adjacent rotating rods (11) being arranged in a staggered manner, and a crushing hammer (112) being provided at one end of the swing rod (111) away from the rotating rod (11).

4. A construction concrete block crushing device according to claim 3, characterized in that: A third support plate (12) is fixedly provided on the outer side of the crushing channel (3); a connecting rod (123) is provided on the third support plate (12); a second transmission gear (121) and an active bevel gear (122) are provided on the connecting rod (123); a first transmission gear (8011) meshing with the second transmission gear (121) is provided at the end of the transmission rod (801); and a driven bevel gear (113) meshing with the active bevel gear (122) is provided at the end of the rotating rod (11).

Images