Novel hinge type circle shear

Abstract

The utility model discloses a novel hinge type circle shear which comprises a base, a fixed memorial archway, a movable memorial archway, a lower cutter shaft assembly and an upper cutter shaft assembly, the lower cutter shaft assembly comprises a fixed lower cutter shaft, the upper cutter shaft assembly comprises a movable upper cutter shaft, and the fixed lower cutter shaft is driven by a cutter shaft driving motor; a hinge type linkage assembly is arranged between the fixed lower cutter shaft and the movable upper cutter shaft and comprises a lower swing arm, an upper swing arm and a housing mounting shaft, a first gear is fixedly mounted at the end of the fixed lower cutter shaft, a second gear is rotatably mounted at the end of the housing mounting shaft, and the lower end of the lower swing arm is rotatably pivoted with the end of the housing mounting shaft. The upper end of the lower swing arm is hinged to one end of the upper swing arm through a middle pivot which is rotationally provided with a third gear. The other end part of the upper swing arm is rotationally pivoted with the end part of the movable upper cutter shaft, a fourth gear is fixedly mounted at the end part of the movable upper cutter shaft, and the first, second, third and fourth gears are sequentially meshed. The utility model has the advantages of novel design, simple structure and low preparation cost.

Description

Technical Field

[0001] The utility model relates to the technical field of shearing equipment, in particular to a novel hinge-type circular shear. Background Art

[0002] The Chinese utility model patent with the patent number ZL202120844167.1 and the patent name "Stainless steel plate shearing machine" actually discloses a circular shear device. Specifically, the stainless steel plate shearing machine includes a base, a main mounting seat fixedly installed on the base, a movable mounting seat slidably installed on the base through a slide rail and arranged opposite to the main mounting seat at an interval. A lower knife shaft assembly and an upper knife shaft assembly are installed between the main mounting seat and the movable mounting seat. The lower knife shaft assembly includes a lower knife shaft seat fixed to the main mounting seat, a lower knife shaft installed on the lower knife shaft seat, and a lower shearing plate motor connected to the lower knife shaft. The upper knife shaft assembly includes an upper knife shaft seat vertically movably installed on the main mounting seat, an upper knife shaft installed on the upper knife shaft seat, and an upper shearing plate motor connected to the upper knife shaft. A plurality of shearing discs are respectively arranged on the upper knife shaft and the lower knife shaft. The movable mounting seat is provided with a lower movable seat and an upper movable seat. The end of the lower knife shaft on the side opposite to the lower knife shaft seat is connected to the lower movable seat, and the end of the upper knife shaft on the side opposite to the upper knife shaft seat is connected to the upper movable seat. The upper knife shaft seat is driven by an upper knife shaft seat cylinder and moves up and down, and the upper movable seat is driven by an upper movable seat cylinder and moves up and down, and the upper knife shaft seat and the upper movable seat move synchronously.

[0003] It should be noted that for the above-mentioned stainless steel plate shearing machine, it has the following defects. Specifically, the upper knife shaft is driven by an upper shearing plate motor, and the lower knife shaft is driven by a lower shearing plate motor. When the lifting and moving adjustment of the upper knife shaft is satisfied, the upper knife shaft and the lower knife shaft need to be driven by two independently arranged power sources, which will increase the complexity of the overall structure and increase the manufacturing cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a novel hinge-type circular shear for the deficiencies of the prior art. The novel hinge-type circular shear is novel in design, simple in structure and low in manufacturing cost.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions.

[0006] A novel hinge-type circular shear includes a base, a fixed frame fixedly installed on the base, and a movable frame slidably installed on the base through a guide rail slider pair. The fixed frame and the movable frame are arranged opposite to each other at an interval.

[0007] The novel hinge-type circular shear further includes a lower knife shaft assembly and an upper knife shaft assembly. The lower knife shaft assembly includes a fixed lower knife shaft arranged horizontally and transversely. The upper knife shaft assembly includes a movable upper knife shaft installed above the fixed lower knife shaft and moving up and down.

[0008] The novel hinge - type circular shear further includes a cutter - shaft driving motor, which is drivingly connected to one end of the fixed lower cutter - shaft;

[0009] A hinge - type linkage assembly is installed between the fixed lower cutter - shaft and the movable upper cutter - shaft. The hinge - type linkage assembly includes a lower swing arm, an upper swing arm, and a housing installation shaft installed on the fixed housing. A first gear is tightly installed at the end of the fixed lower cutter - shaft, a second gear is rotatably installed at the end of the housing installation shaft, and the lower end of the lower swing arm is rotatably pivoted to the end of the housing installation shaft; the upper end of the lower swing arm is hinged to one end of the upper swing arm through an intermediate pivot shaft, and a third gear is rotatably installed on the intermediate pivot shaft; the other end of the upper swing arm is rotatably pivoted to the end of the movable upper cutter - shaft, and a fourth gear is tightly installed at the end of the movable upper cutter - shaft. The first gear, the second gear, the third gear, and the fourth gear are meshed in sequence.

[0010] Wherein, the upper cutter - shaft assembly further includes a fixed - side upper shaft seat that is installed on the fixed housing in a lifting and sliding manner, and a movable - side upper shaft seat that is installed on the movable housing in a lifting and sliding manner. The two ends of the movable upper cutter - shaft are respectively rotatably connected to the corresponding fixed - side upper shaft seat and movable - side upper shaft seat;

[0011] The lower cutter - shaft assembly further includes a fixed - side lower shaft seat that is tightly installed on the fixed housing, and a movable - side lower shaft seat that is tightly installed on the movable housing. The two ends of the fixed lower cutter - shaft are respectively rotatably connected to the corresponding fixed - side lower shaft seat and movable - side lower shaft seat;

[0012] The novel hinge - type circular shear further includes a lifting drive assembly, and the lifting drive assembly is respectively drivingly connected to the fixed - side upper shaft seat and the movable - side upper shaft seat.

[0013] Wherein, the lifting drive assembly includes a fixed - side lifting mechanism installed at the upper end of the fixed housing and a movable - side lifting mechanism installed at the upper end of the movable housing. The fixed - side lifting mechanism and the movable - side lifting mechanism are respectively worm - gear lifting mechanisms. The driving end of the fixed - side lifting mechanism is connected to the fixed - side upper shaft seat, and the driving end of the movable - side lifting mechanism is connected to the movable - side upper shaft seat;

[0014] An elevating drive motor is installed beside the fixed - side lifting mechanism at the upper end of the fixed housing. The power output shaft of the elevating drive motor is connected to the worm of the fixed - side lifting mechanism through a coupling, and the worm of the fixed - side lifting mechanism is connected to the worm of the movable - side lifting mechanism through a telescopic shaft.

[0015] Wherein, the telescopic shaft includes a sleeve shaft and a core shaft. A telescopic installation hole is opened in the core part of the sleeve shaft, the core shaft is telescopically and slidably installed in the telescopic installation hole of the sleeve shaft, and an anti - rotation key is installed between the core shaft and the sleeve shaft;

[0016] The end of the sleeve shaft is connected to the worm of the fixed-side lifting mechanism through a coupling, and the end of the mandrel protruding from the sleeve shaft is connected to the worm of the movable-side lifting mechanism through a coupling.

[0017] Wherein, a lower shaft sleeve is rotatably installed on the movable-side lower shaft seat corresponding to the fixed lower knife shaft through a bearing, the end of the fixed lower knife shaft is sleeved with the lower shaft sleeve, and a lower guiding tapered portion is provided at the end of the fixed lower knife shaft on the side of the lower shaft sleeve;

[0018] The upper shaft sleeve is rotatably installed on the movable-side upper shaft seat corresponding to the movable upper knife shaft through a bearing, the end of the movable upper knife shaft is sleeved with the upper shaft sleeve, and an upper guiding tapered portion is provided at the end of the movable upper knife shaft on the side of the upper shaft sleeve.

[0019] Wherein, a housing driving assembly is installed on the base, the housing driving assembly includes a housing driving motor and a lead screw transmission mechanism respectively installed on the base, and the power output shaft of the housing driving motor is drivingly connected to the lower end of the movable housing through the lead screw transmission mechanism.

[0020] Wherein, the knife shaft driving motor is fixedly installed on the base.

[0021] Compared with the prior art, the present utility model has the following beneficial effects. Specifically: The novel hinge-type disc shear of the present utility model realizes the synchronous linkage of the fixed lower knife shaft and the movable upper knife shaft through a hinge-type linkage assembly, that is, the fixed lower knife shaft and the movable upper knife shaft can be simultaneously driven to rotate by one knife shaft driving motor; compared with the prior art in which the upper and lower knife shafts are independently driven by independent motors, the novel hinge-type disc shear of the present utility model has a simpler structure, so that the manufacturing cost can be effectively reduced. Therefore, the novel hinge-type disc shear of the present utility model has the advantages of novel design, simple structure, and low manufacturing cost. Description of the Drawings

[0022] The present utility model will be further described below with reference to the drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model.

[0023] Figure 1 It is a schematic structural diagram of the present utility model.

[0024] Figure 2 It is Figure 1 a partially enlarged schematic view of

[0025] Figure 3 It is a schematic structural diagram of another perspective of the present utility model.

[0026] Figure 4 It is a schematic structural diagram of the hinge-type linkage assembly of the present utility model.

[0027] InFigures 1 to 4 Included are:

[0028] 1-base; 2-fixed archway; 3-movable archway; 4-guide rail slider pair; 5-lower knife shaft assembly; 51-fixed lower knife shaft; 511-lower guide cone; 52-fixed lower shaft seat; 53-movable lower shaft seat; 54-lower shaft sleeve; 6-upper knife shaft assembly; 61-movable upper knife shaft; 611-upper guide cone; 62-fixed upper shaft seat; 63-movable upper shaft seat; 64-upper shaft sleeve; 7-hinge linkage assembly; 71-lower swing arm; 72-upper swing arm; 7 3-archway mounting shaft; 74-intermediate pivot; 751-first gear; 752-second gear; 753-third gear; 754-fourth gear; 8-lifting drive assembly; 81-fixed side lifting mechanism; 82-movable side lifting mechanism; 83-lifting drive motor; 84-coupling; 85-telescopic shaft; 851-sleeve shaft; 8511-telescopic mounting hole; 852-core shaft; 9-archway drive assembly; 91-archway drive motor; 92-screw transmission mechanism. DETAILED DESCRIPTION

[0029] The present invention will be described below in conjunction with specific implementation methods.

[0030] Embodiment 1, as Figures 1 to 3 As shown, a novel hinged disc shear comprises a base 1, a fixed archway 2 fixedly mounted on the base 1, and a movable archway 3 slidably mounted on the base 1 through a guide rail slider pair 4, wherein the fixed archway 2 and the movable archway 3 are arranged opposite to each other with a gap.

[0031] Among them, Figures 1 to 4 As shown, the novel hinged disc shears also include a lower cutter shaft assembly 5 and an upper cutter shaft assembly 6. The lower cutter shaft assembly 5 includes a fixed lower cutter shaft 51 arranged horizontally and laterally, and the upper cutter shaft assembly 6 includes a movable upper cutter shaft 61 installed above the fixed lower cutter shaft 51 so as to be lifted and moved.

[0032] Furthermore, the novel hinged circular shears also includes a knife shaft drive motor (not shown in the figure), which is drivingly connected to one end of the fixed lower knife shaft 51. The knife shaft drive motor is fixedly mounted on the base 1; of course, the knife shaft drive motor can also be fixedly mounted on the fixed arch 2.

[0033] Furthermore, if Figure 1 , Figure 3 as well as Figure 4As shown in the figure, a hinge - type linkage assembly 7 is installed between the fixed lower knife shaft 51 and the movable upper knife shaft 61. The hinge - type linkage assembly 7 includes a lower swing arm 71, an upper swing arm 72, and a housing installation shaft 73 installed on the fixed housing 2. A first gear 751 is fixedly installed at the end of the fixed lower knife shaft 51. A second gear 752 is rotatably installed at the end of the housing installation shaft 73. The lower end of the lower swing arm 71 is rotatably pivoted to the end of the housing installation shaft 73. The upper end of the lower swing arm 71 is hinged to one end of the upper swing arm 72 through an intermediate pivot shaft 74, and a third gear 753 is rotatably installed on the intermediate pivot shaft 74. The other end of the upper swing arm 72 is rotatably pivoted to the end of the movable upper knife shaft 61, and a fourth gear 754 is fixedly installed at the end of the movable upper knife shaft 61. The first gear 751, the second gear 752, the third gear 753, and the fourth gear 754 are meshed in sequence.

[0034] When the new hinge - type circular shear of the first embodiment performs metal sheet shearing operations, the knife - shaft drive motor drives the fixed lower knife shaft 51 to rotate. The rotating fixed lower knife shaft 51 drives the first gear 751 to rotate synchronously. Since the first gear 751, the second gear 752, the third gear 753, and the fourth gear 754 are meshed in sequence, that is, the rotating fixed lower knife shaft 51 drives the movable upper knife shaft 61 to rotate synchronously through the gear set composed of the first gear 751, the second gear 752, the third gear 753, and the fourth gear 754. Shearing circular knives are installed on both the fixed lower knife shaft 51 and the movable upper knife shaft 61, and the fixed lower knife shaft 51 and the movable upper knife shaft 61 shear the metal sheet through the corresponding shearing circular knives.

[0035] In addition, when adjusting the position of the movable upper knife shaft 61 in a lifting manner, the movable upper knife shaft 61 drives the fourth gear 754 and the end of the upper swing arm 72 to move up and down synchronously. During this process, the lower swing arm 71 and the upper swing arm 72 swing adaptively, and the first gear 751, the second gear 752, the third gear 753, and the fourth gear 754 still maintain the meshing state in sequence.

[0036] It should be emphasized that the new hinge - type circular shear of the first embodiment realizes the synchronous linkage between the fixed lower knife shaft 51 and the movable upper knife shaft 61 through the hinge - type linkage assembly 7, that is, through one knife - shaft drive motor, the fixed lower knife shaft 51 and the movable upper knife shaft 61 can be driven to rotate synchronously at the same time. Compared with the prior - art method in which the upper and lower knife shafts are independently driven by independent motors, the structure of the new hinge - type circular shear of the first embodiment is simpler, and thus the manufacturing cost can be effectively reduced.

[0037] Based on the above - mentioned situation, through the above - mentioned structural design, the new hinge - type circular shear of the first embodiment has the advantages of novel design, simple structure, and low manufacturing cost.

[0038] Embodiment 2, as Figures 1 to 3As shown in the figure, the difference between the second embodiment and the first embodiment is that the upper knife shaft assembly 6 further includes a fixed-side upper shaft seat 62 that is installed on the fixed side of the fixed crossbeam 2 in a lifting and sliding manner, and a movable-side upper shaft seat 63 that is installed on the movable side of the movable crossbeam 3 in a lifting and sliding manner. The two ends of the movable upper knife shaft 61 are respectively rotatably connected to the corresponding fixed-side upper shaft seat 62 and movable-side upper shaft seat 63.

[0039] Among them, the lower knife shaft assembly 5 further includes a fixed-side lower shaft seat 52 that is tightly installed on the fixed side of the fixed crossbeam 2, and a movable-side lower shaft seat 53 that is tightly installed on the movable side of the movable crossbeam 3. The two ends of the fixed lower knife shaft 51 are respectively rotatably connected to the corresponding fixed-side lower shaft seat 52 and movable-side lower shaft seat 53.

[0040] In addition, the novel hinge-type disc shear further includes a lifting drive assembly 8, and the lifting drive assembly 8 is respectively drivingly connected to the fixed-side upper shaft seat 62 and the movable-side upper shaft seat 63.

[0041] When adjusting the position of the movable upper knife shaft 61 in a lifting manner, the lifting drive assembly 8 drives the fixed-side upper shaft seat 62 and the movable-side upper shaft seat 63 to move up and down synchronously, so as to further make the movable upper knife shaft 61 move up and down.

[0042] Embodiment Three, as Figure 1 and Figure 3 shown in the figure, the difference between the third embodiment and the second embodiment is that the lifting drive assembly 8 includes a fixed-side lifting mechanism 81 installed at the upper end of the fixed crossbeam 2 and a movable-side lifting mechanism 82 installed at the upper end of the movable crossbeam 3. The fixed-side lifting mechanism 81 and the movable-side lifting mechanism 82 are respectively worm and worm gear lifting mechanisms. The driving end of the fixed-side lifting mechanism 81 is connected to the fixed-side upper shaft seat 62, and the driving end of the movable-side lifting mechanism 82 is connected to the movable-side upper shaft seat 63.

[0043] Among them, a lifting drive motor 83 is installed beside the fixed-side lifting mechanism 81 at the upper end of the fixed crossbeam 2. The power output shaft of the lifting drive motor 83 is connected to the worm of the fixed-side lifting mechanism 81 through a coupling 84, and the worm of the fixed-side lifting mechanism 81 is connected to the worm of the movable-side lifting mechanism 82 through a telescopic shaft 85.

[0044] When the lifting drive assembly 8 of the third embodiment drives the movable upper knife shaft 61 to adjust its position in a lifting manner, the lifting drive motor 83 directly drives the fixed-side lifting mechanism 81 to act. Since the worm of the fixed-side lifting mechanism 81 is connected to the worm of the movable-side lifting mechanism 82 through the telescopic shaft 85, at this time, the fixed-side lifting mechanism 81 and the movable-side lifting mechanism 82 act synchronously. The fixed-side lifting mechanism 81 drives the fixed-side upper shaft seat 62 to move up and down, and the movable-side lifting mechanism 82 drives the movable-side upper shaft seat 63 to move up and down, so as to further make the movable upper knife shaft 61 move up and down to achieve the adjustment of the lifting position.

[0045] Regarding the worm and worm gear lifting mechanism of the third embodiment, it is already an existing technology, and its working principle and specific structure will not be elaborated here. For details, reference can be made to the Chinese utility model patent with the patent number: ZL201921345193.9 and the patent title: An Adjustable Worm and Worm Gear Lifting Mechanism.

[0046] Embodiment 4, as Figure 1 shown, the difference between this Embodiment 4 and Embodiment 3 is that the telescopic shaft 85 of this Embodiment 4 can adopt the following structural design. Specifically: The telescopic shaft 85 includes a sleeve shaft 851 and a core shaft 852. A telescopic installation hole 8511 is formed in the core part of the sleeve shaft 851. The core shaft 852 is telescopically and slidably fitted into the telescopic installation hole 8511 of the sleeve shaft 851, and an anti-rotation key (not shown in the figure) is installed between the core shaft 852 and the sleeve shaft 851; the end of the sleeve shaft 851 is connected to the worm of the fixed-side lifting mechanism 81 through a coupling 84, and the end of the core shaft 852 extending out of the sleeve shaft 851 is connected to the worm of the movable-side lifting mechanism 82 through a coupling 84.

[0047] It should be explained that when the movable crossbeam 3 moves horizontally relative to the fixed crossbeam 2, the core shaft 852 moves horizontally synchronously with the movable crossbeam 3, and thus the core shaft 852 moves horizontally and telescopically relative to the sleeve shaft 851.

[0048] Embodiment 5, as Figure 2 shown, the difference between this Embodiment 5 and Embodiment 2 is that: A lower shaft sleeve 54 is rotatably installed on the movable-side lower shaft seat 53 corresponding to the fixed lower tool shaft 51 through a bearing. The end of the fixed lower tool shaft 51 is sleeved with the lower shaft sleeve 54, and a lower guiding conical part 511 is provided at the end of the fixed lower tool shaft 51 on the side of the lower shaft sleeve 54.

[0049] Among them, an upper shaft sleeve 64 is rotatably installed on the movable-side upper shaft seat 63 corresponding to the movable upper tool shaft 61 through a bearing. The end of the movable upper tool shaft 61 is sleeved with the upper shaft sleeve 64, and an upper guiding conical part 611 is provided at the end of the movable upper tool shaft 61 on the side of the upper shaft sleeve 64.

[0050] When it is necessary to replace the shearing circular knives of the fixed lower tool shaft 51 and the movable upper tool shaft 61, move the movable housing 3 away from the fixed housing 2 side. At this time, the movable housing 3 horizontally moves relative to the base 1 through the guide rail slider pair 4. During this process, the movable upper tool shaft 61 retreats from the upper bushing 64 and the fixed lower tool shaft 51 retreats from the lower bushing 54. The movable upper tool shaft 61 and the fixed lower tool shaft 51 are held on the fixed housing 2 through the corresponding fixed-side upper shaft seat 62 and fixed-side lower shaft seat 52. After the movable housing 3 retreats from the movable upper tool shaft 61 and the fixed lower tool shaft 51, the staff can perform the operation of replacing the shearing circular knives. After the replacement of the shearing circular knives is completed, move the movable housing 3 towards the fixed housing 2 side, and insert the movable upper tool shaft 61 into the upper bushing 64 and insert the fixed lower tool shaft 51 into the lower bushing 54.

[0051] It should be noted that when the movable upper tool shaft 61 is sleeved in alignment with the upper bushing 64 and the fixed lower tool shaft 51 is sleeved in alignment with the lower bushing 54, the upper guiding tapered portion 611 of the movable upper tool shaft 61 can play a role in guiding the alignment, and the lower guiding tapered portion 511 of the fixed lower tool shaft 51 can also play a role in guiding the alignment.

[0052] Embodiment Six, as Figure 1 shown, the difference between this Embodiment Six and Embodiment One is that: the base 1 is provided with a housing driving assembly 9. The housing driving assembly 9 includes a housing driving motor 91 and a lead screw transmission mechanism 92 respectively installed on the base 1. The power output shaft of the housing driving motor 91 is drivingly connected to the lower end of the movable housing 3 through the lead screw transmission mechanism 92.

[0053] When the novel hinge-type circular shear of this Embodiment Six is in use, the housing driving assembly 9 is used to drive the movable housing 3 to horizontally move relative to the fixed housing 2 to meet the operation requirements of replacing the shearing circular knives. When the housing driving assembly 9 drives the movable housing 3 to horizontally move, the housing driving motor 91 drives the movable housing 3 to horizontally move through the lead screw transmission mechanism 92.

[0054] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A novel hinge-type circular shear, comprising a base (1), a fixed housing (2) fixedly installed on the base (1), and a movable housing (3) slidably installed on the base (1) through a guide rail-slider pair (4). The fixed housing (2) and the movable housing (3) are arranged opposite to each other at an interval. The novel hinge-type circular shear further comprises a lower knife shaft assembly (5) and an upper knife shaft assembly (6). The lower knife shaft assembly (5) includes a fixed lower knife shaft (51) arranged horizontally and transversely. The upper knife shaft assembly (6) includes a movable upper knife shaft (61) installed above the fixed lower knife shaft (51) in a lifting and moving manner. The novel hinge-type circular shear further comprises a knife shaft driving motor, which is drivingly connected to one end of the fixed lower knife shaft (51). It is characterized in that: A hinge-type linkage assembly (7) is installed between the fixed lower knife shaft (51) and the movable upper knife shaft (61). The hinge-type linkage assembly (7) includes a lower swing arm (71), an upper swing arm (72), and a housing mounting shaft (73) installed on the fixed housing (2). A first gear (751) is fixedly installed at the end of the fixed lower knife shaft (51). A second gear (752) is rotatably installed at the end of the housing mounting shaft (73). The lower end of the lower swing arm (71) is rotatably pivoted to the end of the housing mounting shaft (73). The upper end of the lower swing arm (71) is hinged to one end of the upper swing arm (72) through an intermediate pivot shaft (74), and a third gear (753) is rotatably installed on the intermediate pivot shaft (74). The other end of the upper swing arm (72) is rotatably pivoted to the end of the movable upper knife shaft (61), and a fourth gear (754) is fixedly installed at the end of the movable upper knife shaft (61). The first gear (751), the second gear (752), the third gear (753), and the fourth gear (754) are meshed in sequence.

2. A novel hinge - type circular shear according to claim 1, characterized in that: The upper knife shaft assembly (6) further includes a fixed side upper shaft seat (62) slidably installed in a lifting manner on the fixed housing (2) and a movable side upper shaft seat (63) slidably installed in a lifting manner on the movable housing (3). The two ends of the movable upper knife shaft (61) are respectively rotatably connected to the corresponding fixed side upper shaft seat (62) and movable side upper shaft seat (63). The lower knife shaft assembly (5) further includes a fixed side lower shaft seat (52) fixedly installed on the fixed housing (2) and a movable side lower shaft seat (53) fixedly installed on the movable housing (3). The two ends of the fixed lower knife shaft (51) are respectively rotatably connected to the corresponding fixed side lower shaft seat (52) and movable side lower shaft seat (53). The novel hinge-type circular shear further comprises a lifting drive assembly (8), which is drivingly connected to the fixed side upper shaft seat (62) and the movable side upper shaft seat (63) respectively.

3. A novel hinge-type circular shear according to claim 2, characterized in that: The lifting drive assembly (8) includes a fixed-side lifting mechanism (81) installed at the upper end of the fixed housing (2) and a movable-side lifting mechanism (82) installed at the upper end of the movable housing (3). The fixed-side lifting mechanism (81) and the movable-side lifting mechanism (82) are respectively worm and gear lifting mechanisms. The driving end of the fixed-side lifting mechanism (81) is connected to the fixed-side upper shaft seat (62), and the driving end of the movable-side lifting mechanism (82) is connected to the movable-side upper shaft seat (63). An elevating drive motor (83) is installed beside the fixed-side lifting mechanism (81) at the upper end of the fixed housing (2). The power output shaft of the elevating drive motor (83) is connected to the worm of the fixed-side lifting mechanism (81) through a coupling (84). The worm of the fixed-side lifting mechanism (81) is connected to the worm of the movable-side lifting mechanism (82) through a telescopic shaft (85).

4. A novel hinge-type circular shear according to claim 3, characterized in that: The telescopic shaft (85) includes a sleeve shaft (851) and a core shaft (852). A telescopic mounting hole (8511) is formed in the core part of the sleeve shaft (851). The core shaft (852) is telescopically and slidably fitted into the telescopic mounting hole (8511) of the sleeve shaft (851), and an anti-rotation key is installed between the core shaft (852) and the sleeve shaft (851). One end of the sleeve shaft (851) is connected to the worm of the fixed-side lifting mechanism (81) through a coupling (84), and the end of the core shaft (852) extending out of the sleeve shaft (851) is connected to the worm of the movable-side lifting mechanism (82) through a coupling (84).

5. The novel hinge-type circular shear according to claim 2, wherein: A lower shaft sleeve (54) is rotatably installed on the movable-side lower shaft seat (53) corresponding to the fixed lower tool shaft (51) through a bearing. The end of the fixed lower tool shaft (51) is sleeved with the lower shaft sleeve (54), and a lower guiding conical part (511) is provided at the end of the fixed lower tool shaft (51) on the side of the lower shaft sleeve (54). An upper shaft sleeve (64) is rotatably installed on the movable-side upper shaft seat (63) corresponding to the movable upper tool shaft (61) through a bearing. The end of the movable upper tool shaft (61) is sleeved with the upper shaft sleeve (64), and an upper guiding conical part (611) is provided at the end of the movable upper tool shaft (61) on the side of the upper shaft sleeve (64).

6. A novel hinge-type circular shear according to claim 1, characterized in that: The base (1) is equipped with a housing drive assembly (9). The housing drive assembly (9) includes a housing drive motor (91) and a lead screw drive mechanism (92) respectively installed on the base (1). The power output shaft of the housing drive motor (91) is drivingly connected to the lower end of the movable housing (3) through the lead screw drive mechanism (92).

7. A novel hinge-type circular shear according to claim 1, characterized in that: The tool shaft drive motor is firmly installed on the base (1).

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