Olecranon scissors with dynamic gap adjusting and deflection resisting functions

Abstract

The invention discloses eagle beak shears with dynamic gap adjusting and deflection resisting functions, and relates to the technical field of hydraulic shears. The shearing device comprises a connecting frame and a shearing body hinged to the connecting frame through a rotary body, a lower jaw cutter holder is arranged on the front portion of the shearing body, an upper movable shear is installed between supporting side plates on the two sides of the lower jaw cutter holder through a flange shaft, and an anti-deflection bearing assembly is arranged between the flange shaft and the supporting side plates. A hydraulic cylinder is hinged to the shearing body to drive the upper movable shear. The supporting side plates on the two sides are provided with axial locking deviation-preventing mechanisms, each axial locking deviation-preventing mechanism comprises a lubricating wear-resisting supporting block, a trapezoidal screw and an adjusting nut, and dynamic adjustment of the shearing gap is achieved through cooperation with an adjusting motor, a laser range finder and a gap controller. The problems that gap adjustment of an existing hydraulic shear is not timely, hinge points are prone to abrasion and the like are solved, the gap can be automatically and accurately adjusted, the bearing capacity and the lubricating effect are improved, cutter damage is reduced, the service life is prolonged, and the shearing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic shears, and in particular to a hawkbill shear with dynamic gap adjustment and anti-deflection functions. Background Art

[0002] As a high-efficiency hydraulic attachment, hawkbill shears are widely used in waste recycling, automobile dismantling, steel structure processing and building demolition. They are mainly used to shear metal plates, profiles, pipes and other materials. Their shearing efficiency and reliability directly affect the progress of the operation.

[0003] However, the existing hawkbill shears have significant technical limitations in practical applications: First, the shear gap is easily enlarged due to wear, resulting in frequent problems such as uncut cutting, excessive tool damage, and blade breakage when shearing waste materials and medium and thin steel plates. It is even impossible to shear thin plate coverings, which seriously affects the performance of the entire machine; Second, the gap adjustment relies on regular manual operation, and there is a problem of untimely adjustment, which can easily aggravate tool wear and increase the risk of blade breakage. In addition, manual adjustment is inefficient, time-consuming and labor-intensive, and lacks precision, further restricting the performance of the hydraulic shear; Third, the rotating hinge adopts a structure in which the shaft hole is matched and the shaft end face is matched with the support side. When shearing high-hardness materials, the hinge load is extremely high, which is prone to rapid wear and even friction welding, resulting in a decline in the overall performance of the hydraulic shear or direct failure, making it difficult to meet the requirements of efficient and stable operations. Summary of the Invention

[0004] In order to overcome the above technical defects, the present application provides a hawkbill shear with dynamic clearance adjustment and anti-deflection function, including a connecting frame, a shearing body connected to the front end of the connecting frame through a rotating body, a lower jaw knife seat is fixedly provided at the front of the shearing body, and both sides of the lower jaw knife seat extend integrally to form a supporting side plate; a movable shear is rotatably installed between the supporting side plates on both sides through a flange shaft, and an anti-deflection bearing assembly is provided at the assembly interface between the flange shaft and the supporting side plate; a hydraulic cylinder is hinged on the shearing body, and the piston rod end of the hydraulic cylinder is hinged to the upper movable shear; the supporting side plates on both sides are provided with axial locking Anti-deflection mechanism, the axial locking anti-deflection mechanism includes: a lubricated wear-resistant support block arranged on the inner side of the supporting side plate, a trapezoidal screw penetrating the supporting side plate, the trapezoidal screw and the supporting side plate forming a circumferentially constrained rotating pair, and an adjusting nut threadedly engaged with the trapezoidal screw; wherein, the adjusting nut is axially limited in the guide structure of the supporting side plate, and one end thereof is drive-connected to the lubricated wear-resistant support block; the rotation of the trapezoidal screw can drive the adjusting nut to move axially, thereby pushing the lubricated wear-resistant support block to abut against the upper movable shear side wall, so as to dynamically adjust the shear gap between the upper movable scissor blade and the lower jaw knife seat blade.

[0005] As a preferred embodiment of the present application, the support side plate is provided with an inner mounting groove and an outer mounting groove that are coaxially connected, and the inner mounting groove and the outer mounting groove are connected by an axial guide hole;

[0006] An adjustment end cap is provided in the outer mounting groove, and the trapezoidal screw is rotatably mounted on the adjustment end cap via a bearing;

[0007] The lubricating wear-resistant support block is slidably embedded in the inner mounting groove, and the adjusting nut is slidably limited in the guide hole and is in abutment with the end surface of the lubricating wear-resistant support block.

[0008] As a preferred embodiment of the present application, each support side plate is provided with an adjustment motor and a laser rangefinder;

[0009] The output shaft of the regulating motor is connected to the worm through a coupling, and the outer end of the trapezoidal screw is fixedly connected to a worm wheel engaged with the worm;

[0010] The control end of the regulating motor is connected to an encoder, and the encoder and the laser rangefinder signal are connected to the gap controller.

[0011] As a preferred embodiment of the present application, the two side walls of the upper movable shear are respectively fastened with a left wear-resistant attachment plate and a right wear-resistant attachment plate, and the friction surfaces of the left wear-resistant attachment plate and the right wear-resistant attachment plate cooperate with the press-fit surface of the lubricating wear-resistant support block.

[0012] As preferred in this application, the anti-deflection bearing assembly includes:

[0013] The left and right bearing seats are located in the mounting holes of the supporting side plates on both sides.

[0014] Tapered roller bearings embedded in the left and right bearing seats;

[0015] The two ends of the flange shaft pass through the inner rings of the tapered roller bearings on both sides respectively;

[0016] The upper movable shear is sleeved on the flange shaft through the clearance of the lubricating sleeve, and the two ends of the lubricating sleeve are respectively connected to the end faces of the inner rings of the tapered roller bearings on both sides.

[0017] As a preferred embodiment of the present application, the outer ends of the supporting side plates on both sides are respectively fixed to the left locking end cover and the right locking end cover by bolts;

[0018] The right locking end cover is fixedly connected to the right end of the flange shaft by bolts;

[0019] The right locking end cover is threadedly connected with a plurality of tightening bolts, the inner ends of the tightening bolts press against the outer end surface of the right bearing seat, and the outer ends of the tightening bolts are provided with anti-loosening nuts.

[0020] As a preferred embodiment of the present application, a left oil channel and a right oil channel are provided inside the flange shaft, and a grease nipple is provided at the oil inlet end of the left oil channel and the right oil channel;

[0021] The oil outlet ends of the left oil passage and the right oil passage are connected to the bearing installation cavities of the left bearing seat and the right bearing seat respectively.

[0022] As a preferred embodiment of the present application, an oil storage ring groove is formed on the inner wall of the lubricating sleeve, and the left oil channel is provided with an oil injection branch connected to the oil storage ring groove;

[0023] The inner wall of the lubricating sleeve is further provided with a spiral annular oil channel communicated with the oil storage ring groove.

[0024] As a preferred embodiment of the present application, sealing rings are embedded at the joint surfaces of the left bearing seat, the right bearing seat and the supporting side plate, and dustproof sealing rings are embedded between the left bearing seat, the right bearing seat and the lubricating sleeve.

[0025] As a preferred embodiment of the present application, an annular oil passage communicating vertically and horizontally is provided on the press-fit surface between the lubricating wear-resistant support block and the upper movable shear.

[0026] Compared with the existing technology, this application has significant advantages:

[0027] 1. Dynamic and precise gap adjustment: Through the axial locking anti-deflection mechanism combined with the adjustment motor, laser rangefinder and gap controller, automatic real-time monitoring and dynamic adjustment of the shear gap are realized, replacing traditional manual adjustment, solving the problems of untimely adjustment and low precision, effectively avoiding damage to the tool due to excessive gap, and reducing the risk of tool breakage.

[0028] 2. Anti-deflection and high load-bearing: The anti-deflection bearing assembly composed of tapered roller bearings can withstand both axial and radial loads. The preload structure eliminates installation clearance, significantly improves the load-bearing capacity at the hinge point, reduces wear during shearing of high-hardness materials, and avoids friction welding failures.

[0029] 3. Efficient lubrication and wear resistance: The integrated multi-oil lubrication system (oil channel in the flange shaft, oil storage ring groove of the lubricating sleeve and spiral oil channel, etc.), combined with the cooperation of lubricating wear-resistant support blocks and wear-resistant attached plates, ensures continuous lubrication of key friction surfaces and greatly extends the service life of components.

[0030] 4. Self-locking and stable structure: The worm gear and trapezoidal screw-nut structure form a double mechanical self-locking. After adjustment, the gap can remain stable for a long time, reducing the need for frequent adjustments and improving operation stability and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a hawkbill shear with dynamic gap adjustment and anti-deflection functions in the present application;

[0032] Figure 2 It is a schematic diagram of the front part of the shear body of this application;

[0033] Figure 3 This is a side view of the movable shear on the front of the shear body of the present application;

[0034] Figure 4This is a schematic diagram of the motor installation for this application;

[0035] Figure 5 yes Figure 4 Schematic diagram of the cross section along AA;

[0036] Figure 6 This is a schematic diagram of the partial structure of the activity shear in this application;

[0037] Figure 7 This is a schematic diagram of the structure of the lubricating wear-resistant support block of the present application;

[0038] Figure 8 This is a schematic diagram of the anti-deflection bearing assembly of the present application when viewed from above.

[0039] Reference numerals: 1, connecting frame; 2, rotating body; 3, shearing body; 4, lower jaw cutter seat; 5, supporting side plate; 6, flange shaft; 7, upper movable shear; 8, hydraulic cylinder; 9, lubricating wear-resistant support block; 10, trapezoidal screw; 11, adjusting nut; 12, adjusting end cover; 13, adjusting motor; 14, laser rangefinder; 15, coupling; 16, worm; 17, worm gear; 18, encoder; 19, left wear-resistant attachment plate; 20 , right wear-resistant attachment plate; 21. Left bearing seat; 22. Right bearing seat; 23. Tapered roller bearing; 24. Lubrication sleeve; 25. Left locking end cover; 26. Right locking end cover; 27. Tightening bolt; 28. Anti-loosening nut; 29. ​​Left oil channel; 30. Right oil channel; 31. Grease nipple; 32. Oil storage ring groove; 33. Oil injection branch; 34. Spiral annular oil channel; 35. Sealing ring; 36. Annular oil channel, 37. Dustproof sealing ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] As attached Figure 1 -Attached Figure 8 As shown, the anti-split hawkbill shears provided by the present application are composed of a connecting frame 1, a rotating body 2, a shearing body 3, and a driving component. Among them, the connecting frame 1 serves as a connection base with external equipment (such as an excavator or loader), and is connected to the shearing body 3 through the rotating body 2. The rotating body 2 can realize the flexible rotation of the shearing body 3 within a range of 360 degrees, meeting the needs of multi-directional shearing.

[0042] The front of the shearing body 3 is fixedly welded with a lower jaw knife holder 4. Both sides of the lower jaw knife holder 4 extend integrally to form symmetrical supporting side plates 5. The supporting side plates 5 on both sides are arranged in parallel to provide stable support for the upper movable shear 7. The upper movable shear 7 is mounted between the supporting side plates 5 on both sides through the flange shaft 6. Its rotation axis maintains precise coordination with the blade edge of the lower jaw knife holder 4 to ensure the coordination of the shearing action. A hydraulic cylinder 8 is hinged in the middle of the shearing body 3. The piston rod end of the hydraulic cylinder 8 is hinged to the middle of the upper movable shear 7. The upper movable shear 7 is driven to rotate around the flange shaft 6 by the extension and contraction of the hydraulic cylinder 8 to achieve the shearing action between it and the lower jaw knife holder 4.

[0043] The inner sides of the supporting side plates 5 on both sides are provided with an axial locking anti-deviation mechanism for dynamically adjusting the shear gap between the upper movable shear 7 and the lower jaw knife seat 4. Specifically, the supporting side plates 5 are provided with a coaxially connected inner mounting groove, an outer mounting groove and an axial guide hole connecting the two: a lubricating wear-resistant support block 9 is slidably embedded in the inner mounting groove, and its material is made of high-strength wear-resistant alloy (such as high manganese steel), and an annular oil channel 36 connected vertically and horizontally is provided on the press-fit surface with the upper movable shear 7, which can store lubricating oil and form an oil film, reduce friction loss, and increase the service life by more than 3 times compared with ordinary steel support blocks; an adjusting end cover 12 is fixed in the outer mounting groove by bolts, and a trapezoidal screw 10 is rotatably installed in the adjusting end cover 12 through a bearing. The trapezoidal screw 10 passes through the supporting side plate 5 and extends into the guide hole, and is threadedly engaged with the adjusting nut 11 that is limited by sliding in the guide hole. The inner end of the adjusting nut 11 is in contact with the end face of the lubricating wear-resistant support block 9.

[0044] To achieve automated adjustment, an adjustment motor 13 and a laser rangefinder 14 are also fixed to each side support plate 5: the output shaft of the adjustment motor 13 is connected to the worm 16 through a coupling 15, and the outer end of the trapezoidal screw 10 is fixed to the worm gear 17 that meshes with the worm 16, forming a reduction transmission structure to ensure adjustment accuracy; the control end of the adjustment motor 13 is connected to the encoder 18, and the encoder 18 and the laser rangefinder 14 are both connected to the gap controller (such as a PLC controller). In addition, the two side walls of the upper movable shear 7 are provided with a left wear-resistant attachment plate 19 and a right wear-resistant attachment plate 20. Their friction surfaces are mirror-polished and cooperate with the press-fit surface of the lubricating wear-resistant support block 9 to further reduce contact wear.

[0045] The assembly interface between the flange shaft 6 and the supporting side plate 5 is equipped with an anti-deflection bearing assembly to cope with the high loads when shearing high-hardness materials. This assembly includes a left bearing seat 21 and a right bearing seat 22, respectively located in the mounting holes of the supporting side plates 5 on both sides, and a tapered roller bearing 23 embedded in the bearing seat. The tapered roller bearing 23 can simultaneously withstand axial and radial loads, and its load-bearing capacity is increased by more than 50% compared to traditional deep groove ball bearings. The two ends of the flange shaft 6 pass through the inner rings of the tapered roller bearings 23 on both sides. The upper movable shear 7 is mounted on the flange shaft 6 through the gap of the lubricating sleeve 24. The two ends of the lubricating sleeve 24 respectively contact the inner ring end faces of the tapered roller bearings 23 on both sides, ensuring that the rotation of the upper movable shear 7 drives the inner rings of the bearings to move synchronously, reducing relative friction.

[0046] The outer ends of the supporting side plates 5 on both sides are fixed to the left locking end cover 25 and the right locking end cover 26 by bolts. The right locking end cover 26 is fixed to the right end of the flange shaft 6 with bolts. A plurality of tightening bolts 27 are evenly distributed around the circumference. The inner ends of the tightening bolts 27 press against the outer end surface of the right bearing seat 22, which can eliminate the bearing installation clearance through pre-tightening force and adapt to the welding and processing errors of the structural parts; an anti-loosening nut 28 is screwed on the outer end of the tightening bolt 27, and a double-nut anti-loosening structure is adopted, which can effectively improve the anti-loosening effect compared with a single nut.

[0047] A left oil passage 29 and a right oil passage 30 are axially provided inside the flange shaft 6. Grease nipples 31 are installed at the oil inlet ends, and the oil outlet ends are connected to the bearing mounting cavities of the left bearing seat 21 and the right bearing seat 22, respectively. Grease can be injected through a grease gun to provide continuous lubrication for the tapered roller bearing 23. An oil storage annular groove 32 is provided on the inner wall of the lubricating sleeve 24. The left oil passage 29 branches off into an oil injection branch 33 connected to the oil storage annular groove 32. The inner wall of the lubricating sleeve 24 is also provided with a spiral annular oil passage 34 connected to the oil storage annular groove 32. When the upper movable shear 7 rotates, the spiral annular oil passage 34 can evenly distribute the lubricating oil on the inner wall of the sleeve, forming a complete oil film. Compared with the ordinary straight oil passage structure, the lubrication efficiency is improved by 40%. In addition, the joint surfaces of the left bearing seat 21, the right bearing seat 22 and the supporting side plate 5 are all embedded with nitrile rubber sealing rings 35, and the dustproof sealing ring 37 is embedded between the left bearing seat 21, the right bearing seat 22 and the lubrication sleeve 24 to effectively prevent dust and iron filings from entering the hinge point, reducing the risk of wear.

[0048] Working Principle: This application solves the problems of gap loss and hinge wear of traditional hydraulic shears through the collaborative mechanism of "real-time monitoring - precise adjustment - stable load bearing - efficient lubrication". The specific process is as follows:

[0049] 1. Gap monitoring and adjustment

[0050] During shearing, laser rangefinders 14 on both sides monitor the gaps between the upper movable shear 7 and the lower jaw cutter block 4 (left gap L1, right gap L2) in real time and transmit the data to the gap controller. The controller calculates the adjustment amount based on a preset optimal gap value (e.g., 0.1-0.3 mm): the required distance h = (L1 + L2) / 2 - L1. When h > 0, outward adjustment is required (adjustment motor 13 rotates counterclockwise); when h < 0, inward adjustment is required (adjustment motor 13 rotates clockwise).

[0051] The controller sends instructions to encoder 18, causing adjustment motor 13 to rotate according to the calculated number of revolutions n (n = h × Z1 / (P × Z2), where Z1 is the number of worm gear teeth, Z2 is the number of worm starts, and P is the trapezoidal screw pitch). This drives trapezoidal screw 10 through worm 16 and worm gear 17, and adjustment nut 11 moves axially along the guide hole, pushing the lubricated wear-resistant support block 9 against the left wear-resistant attachment plate 19 and the right wear-resistant attachment plate 20 until the clearance reaches the set range. Because the worm gear, trapezoidal screw 10, and adjustment nut 11 all have mechanical self-locking properties, the clearance can remain stable for a long time after adjustment, and slight deviations can be corrected in real time by the system.

[0052] 2. Shearing action and load bearing

[0053] As hydraulic cylinder 8 extends and retracts, it drives the upper movable shear 7 to rotate about flange shaft 6. Lubricated sleeve 24 rotates synchronously with the upper movable shear 7, and friction between its ends drives the inner ring of tapered roller bearing 23. The tapered roller bearing 23 withstands radial loads (from the material's reaction force) and axial loads (from the yaw force of the upper movable shear 7) during the shearing process. Combined with the rigid support provided by left and right bearing seats 21 and 22, the wear rate at the hinge point is reduced by over 60% compared to traditional shaft-hole arrangements, preventing friction welding failures.

[0054] 3. Lubrication maintenance

[0055] Before operation, grease is injected through grease nipple 31. The grease enters the bearing mounting cavity through left and right oil passages 29 and 30, lubricating the tapered roller bearing 23. Simultaneously, some grease enters the oil reservoir groove 32 through oil injection branch 33 and is evenly distributed to the inner wall of the lubricating sleeve 24 via spiral annular oil passage 34, ensuring lubrication between the flange shaft 6 and the sleeve. Annular oil passage 36 lubricates the contact surface between the wear-resistant support block 9 and the wear-resistant attachment plate, reducing friction losses during adjustment and shearing.

[0056] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope defined by the claims of this application.

Claims

1. A hawkbill shear with dynamic gap adjustment and anti-deflection functions, comprising a connecting frame (1), a shearing body (3) connected to the front end of the connecting frame (1) via a rotating body (2), characterized in that: A lower jaw knife seat (4) is fixedly provided at the front of the shearing body (3), and both sides of the lower jaw knife seat (4) extend integrally to form supporting side plates (5); A movable shear (7) is rotatably mounted between the supporting side plates (5) on both sides via a flange shaft (6), and an anti-deflection bearing assembly is provided at the assembly interface between the flange shaft (6) and the supporting side plates (5); A hydraulic cylinder (8) is hinged on the shearing body (3), and the piston rod end of the hydraulic cylinder (8) is hinged to the upper movable shear (7); Both supporting side plates (5) are provided with an axial locking anti-deviation mechanism, and the axial locking anti-deviation mechanism comprises: A lubricating and wear-resistant support block (9) is provided on the inner side of the supporting side plate (5). A trapezoidal screw (10) passes through the supporting side plate (5), and the trapezoidal screw (10) and the supporting side plate (5) form a circumferentially constrained rotation pair. an adjusting nut (11) threadably engaged with the trapezoidal screw (10); The adjusting nut (11) is axially limited in the guide structure of the supporting side plate (5), and one end thereof is drivingly connected to the lubricating wear-resistant support block (9); The rotation of the trapezoidal screw (10) can drive the adjusting nut (11) to move axially, thereby pushing the lubricating wear-resistant support block (9) to abut against the side wall of the upper movable shear (7) to dynamically adjust the shear gap between the blade of the upper movable shear (7) and the blade of the lower jaw knife seat (4).

2. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 1, characterized in that: The supporting side plate (5) is provided with an inner mounting groove and an outer mounting groove that are coaxially connected, and the inner mounting groove and the outer mounting groove are connected via an axial guide hole; An adjusting end cover (12) is provided in the outer mounting groove, and the trapezoidal screw (10) is rotatably mounted on the adjusting end cover (12) via a bearing; The lubricating wear-resistant support block (9) is slidably embedded in the inner mounting groove, and the adjusting nut (11) is slidably limited in the guide hole and is in contact with the end face of the lubricating wear-resistant support block (9).

3. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 2, characterized in that: An adjusting motor (13) and a laser rangefinder (14) are provided on each supporting side plate (5); The output shaft of the regulating motor (13) is connected to the worm (16) via a coupling (15), and the outer end of the trapezoidal screw (10) is fixedly connected to a worm wheel (17) meshing with the worm (16); The control end of the regulating motor (13) is connected to an encoder (18), and the encoder (18) and the laser rangefinder (14) are connected to the gap controller via signals.

4. The hawkbill shears with dynamic gap adjustment and anti-deflection functions according to claim 1, characterized in that: The two side walls of the upper movable shear (7) are respectively fastened with a left wear-resistant attachment plate (19) and a right wear-resistant attachment plate (20), and the friction surfaces of the left wear-resistant attachment plate (19) and the right wear-resistant attachment plate (20) are matched with the press-fit surface of the lubricating wear-resistant support block (9).

5. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 1, characterized in that: The anti-deflection bearing assembly comprises: The left bearing seat (21) and the right bearing seat (22) are respectively arranged in the mounting holes of the supporting side plates (5) on both sides, A tapered roller bearing (23) embedded in the left bearing seat (21) and the right bearing seat (22); The two ends of the flange shaft (6) pass through the inner rings of the tapered roller bearings (23) on both sides respectively; The upper movable shear (7) is sleeved on the flange shaft (6) through a lubricating sleeve (24) with a gap, and the two ends of the lubricating sleeve (24) are respectively connected to the inner ring end faces of the tapered roller bearings (23) on both sides.

6. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 5, characterized in that: The outer ends of the supporting side plates (5) on both sides are respectively fixed to the left locking end cover (25) and the right locking end cover (26) by bolts; The right locking end cover (26) is fixedly connected to the right end of the flange shaft (6) by bolts; The right locking end cover (26) is threadedly connected with a plurality of tightening bolts (27). The inner ends of the tightening bolts (27) press against the outer end surface of the right bearing seat (22), and the outer ends of the tightening bolts (27) are provided with anti-loosening nuts (28).

7. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 5, characterized in that: A left oil passage (29) and a right oil passage (30) are provided inside the flange shaft (6), and grease nipples (31) are provided at the oil inlet ends of the left oil passage (29) and the right oil passage (30); The oil outlet ends of the left oil passage (29) and the right oil passage (30) are respectively connected to the bearing installation cavities of the left bearing seat (21) and the right bearing seat (22).

8. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 7, characterized in that: An oil storage ring groove (32) is formed on the inner wall of the lubricating sleeve (24), and an oil injection branch (33) communicating with the oil storage ring groove (32) is provided on the left oil passage (29); The inner wall of the lubricating sleeve (24) is also provided with a spiral annular oil passage (34) communicating with the oil storage annular groove (32).

9. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 5, characterized in that: Sealing rings (35) are embedded at the joint surfaces of the left bearing seat (21), the right bearing seat (22) and the supporting side plate (5), and dustproof sealing rings (37) are embedded between the left bearing seat (21), the right bearing seat (22) and the lubricating sleeve (24).

10. The hawkbill shears with dynamic gap adjustment and anti-deflection function according to claim 1, characterized in that: A longitudinally and transversely connected annular oil channel (36) is provided on the press-fit surface between the lubricating wear-resistant support block (9) and the upper movable shear (7).

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