Stamping device for machining environment-friendly equipment

Abstract

The invention provides a stamping device for machining environment-friendly equipment, and relates to the field of metal non-cutting machining. A driving hydraulic cylinder is connected to the center of the top end surface of the fixed seat in a fastening manner through a bolt; the bottom end face of an output shaft of the driving hydraulic cylinder is fixedly connected with a stamping block. A stamping groove is formed in the lower part of the fixed seat; the stamping block is aligned with the stamping groove in position; a jacking discharging plate is connected into the stamping groove in a sliding mode. The rear end surface of the fixed seat is fixedly connected with a protective shell; a fixed rotating shaft is rotationally connected to the center of the rear end face of the fixed seat. After stamping is finished, a stamped metal plate is jacked up through a series of transmission, a discharging push plate pushes the jacked metal plate to a discharging inclined groove to slide out, and the problems that a worker needs to manually remove the stamped metal plate from a stamping area, then a new metal plate which is not machined is accurately placed in the stamping area, and the work efficiency is high are solved. And therefore, the problem that the operation process is relatively tedious is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of non-cutting metal processing, and particularly relates to a stamping device for processing environmental protection equipment. Background Art

[0002] During the processing of environmental protection equipment, metal sheets are often used as components such as the shells and brackets of environmental protection equipment. In order to make the metal sheets more compliant with the protection and support requirements of components such as shells and brackets, workers usually use a stamping device to stamp the metal sheets. Existing stamping devices generally consist of a fixed seat, a driving hydraulic cylinder, a stamping block, and a stamping groove.

[0003] For example: The invention patent with the application number CN202010519365.0 discloses a metal sheet stamping device, which specifically includes a fuselage. A working cavity that penetrates left and right and opens forward is provided inside the fuselage. The fuselage is provided with a lifting cavity above the working cavity. Motors are symmetrically and fixedly installed on the bottom wall of the lifting cavity on the left and right. The motors are power-connected to screw motor shafts. The screw motor shafts are rotationally connected to the top wall of the lifting cavity. A lifting plate is slidably installed on the inner wall of the lifting cavity. The lifting plate and the screw motor shafts are in threaded transmission connection. A connecting rod one is fixedly connected to the lower side of the lifting plate. The connecting rod one slidably cooperates with the wall body between the lifting cavity and the working cavity and extends downward. The connecting rod one is fixedly connected with an extrusion device inside the working cavity.

[0004] However, after the existing stamping device finishes stamping the metal sheet, usually workers need to manually remove the stamped metal sheet from the stamping area, and then accurately place the new unprocessed metal sheet in the stamping area to prepare for the next stamping process. This process not only has a relatively cumbersome operation flow, but also makes the labor intensity of workers relatively large and is inconvenient to use. Summary of the Invention

[0005] In view of this, the present invention provides a stamping device for processing environmental protection equipment, which has a lifting blanking plate and a blanking push plate that can automatically blank the stamped metal plate after stamping. After stamping is completed, as the driving hydraulic cylinder drives the stamping block to move upward, with the movement of the stamping block, through a series of transmissions, the control screw rod will drive the threaded sleeve to move upward. With the movement of the threaded sleeve, the lifting blanking plate will be driven to move upward to lift the stamped metal plate. At the same time, during the upward movement of the stamping block, the second control rack will drive the second control gear meshing with it to rotate. Subsequently, through a series of transmissions, the auxiliary rotating shaft will be driven to rotate. During the rotation of the auxiliary rotating shaft, the control cam will be driven to rotate. With the rotation of the control cam, the blanking push plate will be pushed out, causing the blanking push plate to move and stretch the return spring. With the movement of the blanking push plate, the lifted metal plate will be pushed to the blanking chute and slide out.

[0006] The present invention provides the purpose and efficacy of a stamping device for the processing of environmental protection equipment, specifically including: a fixed seat; a driving hydraulic cylinder is bolted and fastened at the center of the top surface of the fixed seat; the bottom end surface of the output shaft of the driving hydraulic cylinder is fixedly connected with a stamping block; a stamping groove is opened in the lower part of the fixed seat; the positions of the stamping block and the stamping groove are aligned; a lifting and blanking plate is slidably connected in the stamping groove; a protective shell is fixedly connected to the rear end surface of the fixed seat; a fixed rotating shaft is rotatably connected at the center of the rear end surface of the fixed seat; the fixed rotating shaft is arranged inside the protective shell; two isolation shells are symmetrically rotatably connected to the outside of the protective shell; both of the two isolation shells are aligned with the stamping groove; a transmission rotating shaft is rotatably connected to the top surface of the fixed seat; a blanking inclined groove is opened in the front part of the fixed seat.

[0007] Further, a first control rack is fixedly connected at the center of the rear part of the top surface of the stamping block; a first control gear is rotatably connected to the top surface of the fixed seat; the first control rack meshes with the first control gear; a first bevel gear is coaxially fixedly connected to the right part of the first control gear; a second bevel gear is coaxially fixedly connected to the front end surface of the transmission rotating shaft; the second bevel gear meshes with the first bevel gear.

[0008] Further, a control worm is coaxially fixedly connected to the rear part of the transmission rotating shaft; a control worm gear is coaxially fixedly connected to the top surface of the fixed rotating shaft.

[0009] Further, a first belt pulley is coaxially fixedly connected to the lower part of the fixed rotating shaft; a control screw rod is rotatably connected in the fixed seat; a second belt pulley is coaxially fixedly connected to the lower part of the control screw rod; the second belt pulley is connected to the first belt pulley through a transmission belt.

[0010] Further, a threaded sleeve is threadedly connected to the outside of the control screw rod; the threaded sleeve is slidably connected in the fixed seat; the top surface of the threaded sleeve is rotatably connected to the bottom end surface of the lifting and blanking plate.

[0011] Further, two second control racks are symmetrically fixedly connected to the rear part of the top surface of the stamping block; two mounting frames are symmetrically fixedly connected to the upper part of the fixed seat; a second control gear is rotatably connected in each of the two mounting frames; the two second control racks respectively mesh with the two second control gears.

[0012] Further, a control ratchet is coaxially and fixedly connected inside each of the two second control gears; a connecting rotating shaft is rotatably connected inside each of the two mounting brackets; a control pawl is hingedly connected to the front of each of the two connecting rotating shafts; the two control pawls are respectively engaged with the two control ratchets; a third bevel gear is coaxially and fixedly connected to the rear of each of the two connecting rotating shafts; two auxiliary rotating shafts are symmetrically and rotatably connected inside the fixed seat; a fourth bevel gear is coaxially and fixedly connected to the upper part of each of the two auxiliary rotating shafts; the two fourth bevel gears are respectively engaged with the two third bevel gears.

[0013] Further, a control cam is coaxially and fixedly connected to the lower part of each of the two auxiliary rotating shafts; a blanking push plate is slidably connected to the lower part of the fixed seat; the blanking push plate is aligned with the punching groove; multiple reset springs are fixedly connected to the rear of the blanking push plate; the ends of the multiple reset springs are fixedly connected to the outside of the fixed seat.

[0014] Further, a fifth bevel gear is coaxially and fixedly connected to the middle of the outside of the fixed rotating shaft; two control rotating shafts are symmetrically and rotatably connected inside the protective shell; a sixth bevel gear is coaxially and fixedly connected to the inner side of each of the two control rotating shafts; the two sixth bevel gears are both engaged with the fifth bevel gear.

[0015] Further, a seventh bevel gear is coaxially and fixedly connected to the outside of each of the two control rotating shafts; an eighth bevel gear is coaxially and fixedly connected to the upper part of each of the two isolation housing rotating shafts; the two eighth bevel gears are respectively engaged with the two seventh bevel gears.

[0016] Beneficial effects: After the stamping is completed in the present invention, as the stamping block is lifted, the first control rack will slowly contact the first control gear and drive the first control gear to rotate. Subsequently, through a series of transmissions, the control screw is driven to rotate. During the rotation of the control screw, the threaded sleeve is driven to move upward. As the threaded sleeve moves, the jacking blanking plate is driven to move upward, lifting the stamped metal plate, facilitating the subsequent blanking of the metal plate, and effectively improving the convenience of the stamping device.

[0017] When the stamping block is lifted, the second control rack will also slowly contact the second control gear and drive the second control gear to rotate. At the same time, through a series of transmissions, the control cam is driven to rotate. As the control cam rotates, the blanking push plate is pushed out, causing the blanking push plate to move and stretch the reset spring. As the blanking push plate moves, the lifted metal plate is pushed to the blanking chute and slides out, automatically blanking the lifted metal plate, effectively reducing the labor intensity of the staff and further improving the convenience of the stamping device.

[0018] During the rotation of the fixed rotating shaft, the fifth bevel gear is also driven to rotate. Subsequently, through a series of transmissions, the isolation housing is driven to rotate. When the stamping block moves upward, the isolation housing automatically opens, and when the stamping block moves downward, the isolation housing automatically closes, effectively improving the safety of the stamping device and making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0021] In the drawings: Figure 1 is the axonometric structural schematic diagram of the present invention.

[0022] Figure 2 is the structural schematic diagram of the closed isolation housing of the present invention.

[0023] Figure 3 is the sectional structural schematic diagram of the protective housing of the present invention.

[0024] Figure 4 is the present invention Figure 3 The enlarged structural schematic diagram at position A.

[0025] Figure 5 is the present invention Figure 3 The enlarged structural schematic diagram at position B.

[0026] Figure 6 is the sectional structural schematic diagram of the present invention.

[0027] Figure 7 is the axonometric structural schematic diagram of the second control rack of the present invention.

[0028] Figure 8 is the present invention Figure 7 The enlarged structural schematic diagram at position C.

[0029] Figure 9 is the axonometric sectional structural schematic diagram of the present invention.

[0030] Figure 10 is the axonometric structural schematic diagram of the control worm of the present invention.

[0031] Figure 11 is the sectional structural schematic diagram of the threaded sleeve of the present invention.

[0032] LIST OF REFERENCE NUMERALS 1. Fixed seat; 101. Driving hydraulic cylinder; 102. Feeding chute; 103. Protective shell; 104. Stamping block; 105. First control rack; 106. First control gear; 107. First bevel gear; 108. Transmission rotating shaft; 109. Second bevel gear; 110. Control worm; 111. Fixed rotating shaft; 112. Control worm gear; 113. First pulley; 114. Control screw; 115. Second pulley; 116. Threaded sleeve; 117. Lifting and feeding plate; 118. Second control rack; 119. Mounting frame; 120. Second control gear; 121. Control ratchet; 122. Connecting rotating shaft; 123. Control pawl; 124. Third bevel gear; 125. Auxiliary rotating shaft; 126. Fourth bevel gear; 127. Control cam; 128. Feeding push plate; 129. Return spring; 130. Fifth bevel gear; 131. Control rotating shaft; 132. Sixth bevel gear; 133. Seventh bevel gear; 134. Isolation housing; 135. Eighth bevel gear; 136. Stamping groove. Detailed implementation manner

[0033] Embodiment 1: The present invention provides a stamping device for processing environmental protection equipment. Please refer to Figures 1 to 11 as shown, including: a fixed seat 1; A driving hydraulic cylinder 101 is bolted and fixedly connected to the center of the top surface of the fixed seat 1; the bottom end surface of the output shaft of the driving hydraulic cylinder 101 is fixedly connected with a stamping block 104; a stamping groove 136 is opened in the lower part of the fixed seat 1; the stamping block 104 is aligned with the stamping groove 136; a lifting and feeding plate 117 is slidably connected in the stamping groove 136; a protective shell 103 is fixedly connected to the rear end surface of the fixed seat 1; a fixed rotating shaft 111 is rotatably connected to the center of the rear end surface of the fixed seat 1; the fixed rotating shaft 111 is arranged inside the protective shell 103; two isolation housings 134 are symmetrically rotatably connected to the outside of the protective shell 103; both of the two isolation housings 134 are aligned with the stamping groove 136; a transmission rotating shaft 108 is rotatably connected to the top surface of the fixed seat 1; a feeding chute 102 is opened in the front part of the fixed seat 1.

[0034] Among them, a first control rack 105 is fixedly connected to the center of the rear part of the top surface of the stamping block 104; a first control gear 106 is rotatably connected to the top surface of the fixed seat 1; the first control rack 105 is engaged with the first control gear 106; a first bevel gear 107 is coaxially fixedly connected to the right part of the first control gear 106; a second bevel gear 109 is coaxially fixedly connected to the front end surface of the transmission rotating shaft 108; the second bevel gear 109 is engaged with the first bevel gear 107.

[0035] Among them, a control worm 110 is coaxially fixedly connected to the rear part of the transmission rotating shaft 108; a control worm gear 112 is coaxially fixedly connected to the top surface of the fixed rotating shaft 111.

[0036] Among them, a first pulley 113 is coaxially and fixedly connected to the lower part of the fixed rotating shaft 111; a control screw 114 is rotatably connected in the fixed seat 1; a second pulley 115 is coaxially and fixedly connected to the lower part of the control screw 114; the second pulley 115 is connected to the first pulley 113 through a transmission belt.

[0037] Among them, a threaded sleeve 116 is threadedly connected to the outside of the control screw 114; the threaded sleeve 116 is slidably connected in the fixed seat 1; the top end surface of the threaded sleeve 116 is rotatably connected to the bottom end surface of the jacking blanking plate 117.

[0038] Among them, two second control racks 118 are symmetrically and fixedly connected to the rear part of the top end surface of the stamping block 104; two mounting brackets 119 are symmetrically and fixedly connected to the upper part of the fixed seat 1; a second control gear 120 is rotatably connected in each of the two mounting brackets 119; the two second control racks 118 are respectively engaged with the two second control gears 120.

[0039] Among them, a control ratchet 121 is coaxially and fixedly connected to each of the two second control gears 120; a connecting rotating shaft 122 is rotatably connected in each of the two mounting brackets 119; a control pawl 123 is hingedly connected to the front part of each of the two connecting rotating shafts 122; the two control pawls 123 are respectively engaged with the two control ratchets 121; a third bevel gear 124 is coaxially and fixedly connected to the rear part of each of the two connecting rotating shafts 122; two auxiliary rotating shafts 125 are symmetrically rotatably connected in the fixed seat 1; a fourth bevel gear 126 is coaxially and fixedly connected to the upper part of each of the two auxiliary rotating shafts 125; the two fourth bevel gears 126 are respectively engaged with the two third bevel gears 124.

[0040] Among them, a control cam 127 is coaxially and fixedly connected to the lower part of each of the two auxiliary rotating shafts 125; a blanking push plate 128 is slidably connected to the lower part of the fixed seat 1; the blanking push plate 128 is aligned with the stamping groove 136; multiple groups of return springs 129 are fixedly connected to the rear part of the blanking push plate 128; the ends of the multiple groups of return springs 129 are fixedly connected to the outside of the fixed seat 1.

[0041] Specific usage method and function of this embodiment: In the present invention, after stamping is completed, as the driving hydraulic cylinder 101 drives the stamping block 104 to move upward, the movement of the stamping block 104 will drive the first control rack 105 to move. As the first control rack 105 moves, it will drive the first control gear 106 to rotate. The rotation of the first control gear 106 drives the first bevel gear 107 to rotate. During the rotation of the first bevel gear 107, it will drive the second bevel gear 109 engaged with it to rotate. The rotation of the second bevel gear 109 drives the transmission rotating shaft 108 to rotate. During the rotation of the transmission rotating shaft 108, it will drive the control worm 110 to rotate. The rotation of the control worm 110 drives the control worm gear 112 engaged with it to rotate. During the rotation of the control worm gear 112, it will drive the fixed rotating shaft 111 to rotate. During the rotation of the fixed rotating shaft 111, it will drive the first belt pulley 113 to rotate. During the rotation of the first belt pulley 113, the second belt pulley 115 will be driven to rotate through the transmission belt. As the second belt pulley 115 rotates, it will drive the control screw 114 to rotate. During the rotation of the control screw 114, it will drive the threaded sleeve 116 to move upward. As the threaded sleeve 116 moves, it will drive the jacking blanking plate 117 to move upward, jacking up the stamped metal plate. During the stamping of the metal plate, as the stamping block 104 moves downward, the above movement will be reversed, so that the jacking blanking plate 117 automatically retracts into the stamping groove 136 for convenient stamping of the metal plate. During the upward movement of the stamping block 104, the second control rack 118 will drive the second control gear 120 engaged with it to rotate. Since the length of the second control rack 118 is shorter than that of the first control rack 105, after the first control rack 105 engages with the first control gear 106 and drives it to rotate to a certain extent, the second control rack 118 will then engage with the second control gear 120 to rotate. Through the cooperation of the control ratchet 121 and the control pawl 123, the second control gear 120 will drive the connecting rotating shaft 122 to rotate only when the stamping block 104 moves upward. When the stamping block 104 moves downward, the second control gear 120 cannot drive the connecting rotating shaft 122 to rotate. As the connecting rotating shaft 122 rotates, it will drive the third bevel gear 124 to rotate. As the third bevel gear 124 rotates, it will drive the fourth bevel gear 126 engaged with it to rotate. During the rotation of the fourth bevel gear 126, it will drive the auxiliary rotating shaft 125 to rotate. During the rotation of the auxiliary rotating shaft 125, it will drive the control cam 127 to rotate. As the control cam 127 rotates, it will push out the blanking push plate 128, causing the blanking push plate 128 to move and stretch the return spring 129. As the blanking push plate 128 moves, it will push the jacked-up metal plate to the blanking chute 102 and slide it out.The second control rack 118 and the second control gear 120 can just make the control cam 127 rotate 360 degrees from the start of contact to the end of rotation of the second control gear 120.

[0042] Embodiment 2: On the basis of Embodiment 1, please refer to Figures 3 to 5 As shown in the figure, it includes: a fifth bevel gear 130, a control rotating shaft 131, a sixth bevel gear 132, and a seventh bevel gear 133. A fifth bevel gear 130 is fixedly connected to the outside of the fixed rotating shaft 111 in a centered manner; two control rotating shafts 131 are symmetrically and rotatably connected inside the protective housing 103; a sixth bevel gear 132 is coaxially and fixedly connected to the inner side of each of the two control rotating shafts 131; the two sixth bevel gears 132 are both meshed with the fifth bevel gear 130.

[0043] Wherein, a seventh bevel gear 133 is coaxially and fixedly connected to the outer side of each of the two control rotating shafts 131; an eighth bevel gear 135 is coaxially and fixedly connected to the upper part of the rotating shaft of each of the two isolation housings 134; the two eighth bevel gears 135 are respectively meshed with the two seventh bevel gears 133.

[0044] The specific usage method and function of this embodiment: In the present invention, during the rotation of the fixed rotating shaft 111, the fifth bevel gear 130 will also be driven to rotate. Through the rotation of the fifth bevel gear 130, the sixth bevel gear 132 meshed with it will be driven to rotate. Through the rotation of the sixth bevel gear 132, the control rotating shaft 131 will be driven to rotate. When the seventh bevel gear 133 rotates, the eighth bevel gear 135 will be driven to rotate. As the eighth bevel gear 135 rotates, the isolation housing 134 will be driven to rotate. When the stamping block 104 moves upward, the isolation housing 134 will automatically open, and when the stamping block 104 moves downward, the isolation housing 134 will automatically close.

[0045] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0046] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0047] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A stamping device for processing environmental protection equipment, comprising: A fixing seat (1); a driving hydraulic cylinder (101) is bolted and connected in the middle of the top end surface of the fixing seat (1); a punching block (104) is fixedly connected to the bottom end surface of the output shaft of the driving hydraulic cylinder (101); the fixing seat (1) is characterized in that a punching groove (136) is provided at the bottom; the punching block (104) is aligned with the punching groove (136); a lifting and unloading plate (117) is slidably connected in the punching groove (136); a protective The fixed seat (1) is rotatably connected to a fixed shaft (111) at the rear end face thereof; the fixed shaft (111) is arranged on the inner side of the protective shell (103); the outer side of the protective shell (103) is symmetrically rotatably connected to two isolation shells (134); the two isolation shells (134) are aligned with the positions of the punching groove (136); the top end face of the fixed seat (1) is rotatably connected to a transmission shaft (108); and a material discharge chute (102) is provided at the front of the fixed seat (1).

2. A punching device for processing environmental protection equipment as claimed in claim 1, characterized in that: A first control rack (105) is fixedly connected to the center of the rear portion of the top end surface of the punching block (104); a first control gear (106) is rotatably connected to the top end surface of the fixing seat (1); the first control rack (105) meshes with the first control gear (106); a first bevel gear (107) is coaxially fixedly connected to the right portion of the first control gear (106); a second bevel gear (109) is coaxially fixedly connected to the front end surface of the transmission shaft (108); and the second bevel gear (109) meshes with the first bevel gear (107).

3. A punching device for processing environmental protection equipment as claimed in claim 1, characterized in that: A control worm (110) is coaxially and fixedly connected to the rear of the transmission shaft (108); and a control worm wheel (112) is coaxially and fixedly connected to the top end of the fixed shaft (111).

4. A punching device for processing environmental protection equipment as claimed in claim 1, characterized in that: A first pulley (113) is coaxially and fixedly connected to the lower part of the fixed rotating shaft (111); a control screw (114) is rotatably connected inside the fixed seat (1); a second pulley (115) is coaxially and fixedly connected to the lower part of the control screw (114); and the second pulley (115) is connected to the first pulley (113) via a transmission belt.

5. A punching device for processing environmental protection equipment as claimed in claim 4, characterized in that: The external thread of the control screw (114) is connected to a threaded sleeve (116); the threaded sleeve (116) is slidably connected in the fixing seat (1); and the top end surface of the threaded sleeve (116) is rotatably connected to the bottom end surface of the lifting and unloading plate (117).

6. A punching device for processing environmental protection equipment as claimed in claim 1, characterized in that: Two second control racks (118) are symmetrically fixedly connected to the rear portion of the top end surface of the punching block (104); two mounting frames (119) are symmetrically fixedly connected to the upper portion of the fixing seat (1); a second control gear (120) is rotatably connected inside each of the two mounting frames (119); and the two second control racks (118) are respectively meshed with the two second control gears (120).

7. A punching device for processing environmental protection equipment as claimed in claim 6, characterized in that: A control ratchet (121) is coaxially fixedly connected to the two second control gears (120); a connecting shaft (122) is rotatably connected to the two mounting frames (119); the front parts of the two connecting shafts (122) are hingedly connected to a control pawl (123); the two control pawls (123) are respectively meshed with the two control ratchets (121); the rear parts of the two connecting shafts (122) are coaxially fixedly connected to a third bevel gear (124); two auxiliary shafts (125) are symmetrically rotatably connected to the fixing seat (1); the upper parts of the two auxiliary shafts (125) are coaxially fixedly connected to a fourth bevel gear (126); and the two fourth bevel gears (126) are respectively meshed with the two third bevel gears (124).

8. A punching device for processing environmental protection equipment as claimed in claim 7, characterized in that: The lower parts of the two auxiliary rotating shafts (125) are coaxially fixedly connected to a control cam (127); the lower part of the fixed seat (1) is slidably connected to a material unloading push plate (128); the position of the material unloading push plate (128) and the punching groove (136) are aligned; the rear part of the material unloading push plate (128) is fixedly connected to multiple groups of return springs (129); the ends of the multiple groups of return springs (129) are fixedly connected to the outside of the fixed seat (1).

9. A punching device for processing environmental protection equipment as claimed in claim 1, characterized in that: A fifth bevel gear (130) is fixedly connected to the center of the fixed rotating shaft (111); two control rotating shafts (131) are symmetrically rotatably connected inside the protective shell (103); a sixth bevel gear (132) is coaxially fixedly connected to the inner sides of the two control rotating shafts (131); and the two sixth bevel gears (132) are meshed with the fifth bevel gear (130).

10. A punching device for processing environmental protection equipment as claimed in claim 9, characterized in that: The outer sides of the two control rotating shafts (131) are coaxially fixedly connected to a seventh bevel gear (133); the upper parts of the rotating shafts of the two isolation housings (134) are coaxially fixedly connected to an eighth bevel gear (135); and the two eighth bevel gears (135) are respectively meshed with the two seventh bevel gears (133).

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