Large hobbing shear rack and lower knife rest tooth connecting mechanism

Abstract

The utility model discloses a large hobbing shear rack and lower knife rest tooth connecting mechanism, and belongs to the technical field of hobbing shear connecting mechanisms. The hobbing shear comprises a left hobbing shear rack, a right hobbing shear rack and a lower tool rest, the lower tool rest is located between the left hobbing shear rack and the right hobbing shear rack, a first tooth row is arranged on the portion, located on the joint face of the left hobbing shear rack and the lower tool rest, of the lower tool rest, and a second tooth row is arranged on the portion, located on the joint face of the left hobbing shear rack, of the lower tool rest in a matched mode. The first tooth row is meshed with the second tooth row in a mutually perpendicular mode, a third tooth row is arranged on the face, combined with the lower tool rest, of the right rack of the hobbing shear, a fourth tooth row is arranged on the face, combined with the right rack of the hobbing shear, of the lower tool rest in a matched mode, and the third tooth row is meshed with the fourth tooth row in a mutually perpendicular mode. The connecting strength of the machine frame and the lower tool rest can be greatly improved, large shearing force can be borne, stress is even, and the phenomenon that stress is concentrated when a pair of hobbing shears with large width specifications is adopted is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of rolling shear connection mechanisms, in particular to a connection mechanism between a large rolling shear frame and a lower cutter frame teeth. Background Art

[0002] At present, for small-sized rolling-cut fixed-length and cropping shears, the key connection between the frame and the lower blade holder can meet the shear force requirements. However, for large-sized rolling-cut fixed-length and cropping shears, especially those with a width of more than 5000mm (rolling-cut fixed-length and cropping shears are hereinafter referred to as rolling-cut shears), the conventional traditional key connection form will cause stress concentration, and the connection strength can no longer meet the shear force requirements, which will affect the service life and use cycle of the frame, lower blade holder and even the entire rolling-cut shear. Utility Model Content

[0003] The utility model is aimed at the above-mentioned problems, makes up for the deficiencies of the existing technology, and provides a large-scale rolling shear frame and lower knife frame tooth connection mechanism; the utility model can greatly improve the connection strength between the frame and the lower knife frame, can withstand large shear force and force evenly, and avoid stress concentration when facing rolling shears with large width specifications.

[0004] In order to achieve the above-mentioned purpose, the present utility model adopts the following technical solutions.

[0005] The utility model provides a large-scale rolling shear frame and a lower blade holder tooth connection mechanism, comprising a left rolling shear frame, a right rolling shear frame and a lower blade holder, wherein the lower blade holder is located between the left rolling shear frame and the right rolling shear frame, and is characterized in that the left rolling shear frame is provided with a first tooth row at the engaging surface with the lower blade holder, and the lower blade holder is matched with a second tooth row at the engaging surface with the left rolling shear frame, and the first tooth row and the second tooth row are perpendicularly meshed with each other, and the right rolling shear frame is provided with a third tooth row at the engaging surface with the lower blade holder, and the lower blade holder is matched with a fourth tooth row at the engaging surface with the right rolling shear frame, and the third tooth row and the fourth tooth row are perpendicularly meshed with each other, so that the lower blade holder, the left rolling shear frame and the right rolling shear frame are connected into a whole through a multi-tooth mechanism.

[0006] Furthermore, the left frame of the rolling shear is gear-connected with the lower cutter frame and then fastened together by a screw, a washer and a nut.

[0007] Furthermore, the right frame of the rolling shear is gear-connected with the lower cutter frame and then fastened together by a screw, a washer and a nut.

[0008] Furthermore, the first tooth row adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

[0009] Furthermore, the second tooth row also adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

[0010] Furthermore, the third tooth row adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

[0011] Furthermore, the fourth tooth row also adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

[0012] The beneficial effects of the utility model.

[0013] The utility model adopts a multi-tooth connection method to withstand shear force, and the load-bearing surface is greatly improved compared with the key connection, and the force is evenly distributed, and deformation and cracks of the frame and the lower knife holder due to stress concentration in the keyway will not occur, thereby greatly improving the load-bearing capacity of the frame and the lower knife holder, greatly improving the connection strength, and improving the service life and use cycle of the frame lower knife holder and even the entire rolling shear, thereby greatly improving the shearing quality and equipment accuracy of the equipment, and making the force application structure of the large rolling shear become mature and perfect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the left frame of the rolling shear of the present utility model.

[0017] Figure 3 It is an enlarged structural diagram of the first tooth row viewed from the G direction on the left frame of the rolling shear of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the right frame of the rolling shear of the present utility model.

[0019] Figure 5 It is an enlarged structural diagram of the third tooth row viewed from the H direction on the right frame of the rolling shear of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the lower tool holder of the present utility model.

[0021] Markings in the figure: 1 is the left frame of the rolling shear, 2 is the first tooth row, 3 is the second tooth row, 4 is the lower knife frame, 5 is the third tooth row, 6 is the fourth tooth row, and 7 is the right frame of the rolling shear. DETAILED DESCRIPTION

[0022] As shown in the accompanying drawings, this embodiment provides a large rolling shear frame and lower blade rack tooth connection mechanism, including a rolling shear left frame 1, a rolling shear right frame 7 and a lower blade rack 4, and the lower blade rack 4 is located between the rolling shear left frame 1 and the rolling shear right frame 7.

[0023] The left frame 1 of the rolling shear is provided with a first tooth row 2 at the mating surface with the lower tool holder 4. The lower tool holder 4 is provided with a second tooth row 3 at the mating surface with the left frame 1 of the rolling shear. The first tooth row 2 and the second tooth row 3 are vertically meshed with each other. The first tooth row 2 adopts a 60-degree tooth structure, a tooth pitch of 12mm, and a total number of 78 teeth. The 60-degree tooth structure has a thick tooth shape and a large tooth root thickness, which can withstand greater bending stress. The pitch of 12mm is a large pitch. This large pitch tooth can withstand greater torque. According to finite element force analysis, 78 teeth can withstand all the shear forces of a large rolling shear. Correspondingly, the second tooth row 3 also adopts a 60-degree tooth structure, a tooth pitch of 12mm, and a total number of 78 teeth.

[0024] The left frame 1 of the rolling shear is connected to the lower knife frame 4 and then put together through screws, washers and nuts. In this way, when the rolling shear is cutting, the shearing force is completely borne by the connecting teeth at both ends, and each tooth is evenly stressed, so that the shearing work of the rolling shear can be perfectly completed.

[0025] The right frame 7 of the rolling shear is equipped with a third tooth row 5 at the interface with the lower blade holder 4. The lower blade holder 4 is also equipped with a fourth tooth row 6 at the interface with the right frame 7 of the rolling shear. The third tooth row 5 and the fourth tooth row 6 mesh perpendicularly with each other, connecting the lower blade holder 4, the left frame 1 of the rolling shear, and the right frame 7 of the rolling shear into a whole through a multi-tooth mechanism. The third tooth row 5 adopts a 60-degree tooth structure, with a tooth pitch of 12mm and a total number of teeth of 78. The reason for setting this value is the same as that of the first tooth row 2. Correspondingly, the fourth tooth row 6 also adopts a 60-degree tooth structure, with a tooth pitch of 12mm and a total number of teeth of 78.

[0026] Similarly, the right frame 7 of the rolling shear is tooth-connected with the lower knife frame 4 and then put together through a screw, a washer and a nut.

[0027] Through the above-mentioned multi-tooth connection structure, not only the positioning is accurate and the load-bearing capacity is strong, but also the situation of insufficient load-bearing capacity of key connection, stress concentration and cracks in the stress-bearing area will not occur. Compared with the existing key connection technology, the multi-tooth connection method is used to withstand shear force, and the load-bearing surface is greatly improved than the key connection, and the force is evenly distributed. There will be no deformation and cracks on the frame and the lower tool holder 4 due to stress concentration in the keyway, thereby greatly improving the load-bearing capacity of the frame and the lower tool holder 4, greatly improving the connection strength, and improving the service life and use cycle of the frame and the lower tool holder 4 and even the entire rolling shear, thereby greatly improving the shearing quality and equipment precision of the equipment, thereby making the force application structure of the large rolling shear mature and perfect.

[0028] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the implementation methods of the present invention. Ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. A large-scale rolling shear frame and lower blade holder tooth connection mechanism, comprising a rolling shear left frame (1), a rolling shear right frame (7) and a lower blade holder (4), wherein the lower blade holder (4) is located between the rolling shear left frame (1) and the rolling shear right frame (7), and is characterized in that: The left frame (1) of the rolling shear is provided with a first tooth row (2) at the surface where it is engaged with the lower blade holder (4); the lower blade holder (4) is provided with a second tooth row (3) at the surface where it is engaged with the left frame (1) of the rolling shear; the first tooth row (2) and the second tooth row (3) are vertically meshed with each other; the right frame (7) of the rolling shear is provided with a third tooth row (5) at the surface where it is engaged with the lower blade holder (4); the lower blade holder (4) is provided with a fourth tooth row (6) at the surface where it is engaged with the right frame (7) of the rolling shear; the third tooth row (5) and the fourth tooth row (6) are vertically meshed with each other, and the lower blade holder (4), the left frame (1) of the rolling shear and the right frame (7) of the rolling shear are connected into a whole through a multi-tooth mechanism.

2. A large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 1, characterized in that: The left frame (1) of the rolling shear is gear-connected with the lower blade frame (4) and then assembled together via a screw, a washer and a nut.

3. The large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 1, characterized in that: The right frame (7) of the rolling shear is gear-connected with the lower knife frame (4) and then assembled together through a screw, a washer and a nut.

4. The large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 1, characterized in that: The first tooth row (2) adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

5. The large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 4, characterized in that: The second tooth row (3) also adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

6. The large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 1, characterized in that: The third tooth row (5) adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of 78 teeth.

7. The large-scale rolling shear frame and lower cutter frame tooth connection mechanism according to claim 6, characterized in that: The fourth tooth row (6) also adopts a 60-degree tooth structure, a tooth spacing of 12 mm, and a total number of teeth of 78.

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