Crank arm limiting structure

Abstract

The invention discloses a crank arm limiting structure, and relates to the related technical field of liquid crystal glass substrate forming equipment, the crank arm limiting structure comprises a crank arm, a positioning sleeve and a crank arm rotating shaft, the crank arm rotating shaft is sleeved with the crank arm and the positioning sleeve, the positioning sleeve is installed on the crank arm rotating shaft through a locknut, the positioning sleeve is sleeved with a copper pad and a limiting clamp, and the limiting clamp is installed on the positioning sleeve. A limiting ring groove is formed in the outer side face of the positioning sleeve, the limiting clamp comprises a limiting frame, and the limiting frame is of a U-shaped limiting frame body structure. The screw is used for driving the wedge-shaped block to move so that the positioning sleeve can be clamped by the clamp, and axial limiting in a limited space is achieved; by means of the combination of the positioning sleeve and the limiting clamp, the limiting clamp can be normally removed after the positioning sleeve is clamped in a threaded mode, then normal disassembly and assembly of the crank arm are achieved, the clamping position can be selected according to the actual production requirement, then the adjustable limiting position within the design margin is achieved, and safety, flexibility and practicability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field related to liquid crystal glass substrate forming equipment, and in particular to a crank arm limiting structure. Background Art

[0002] There are three main manufacturing processes for glass substrates: float, hole-pull and overflow melting. The current mainstream process is overflow melting. The overflow melting method is to introduce molten glass into a conduit. When the glass reaches the upper limit of the volume, it overflows from both sides of the conduit along the tube wall and converges at the bottom like a waterfall to form a sheet substrate. The overflow melting technology can produce ultra-thin glass substrates with double original glass surfaces. Compared with the float method and hole-pull method, it can avoid post-processing processes such as grinding or polishing. It has now become the mainstream of TFT-LCD substrate glass manufacturing process.

[0003] In the overflow down-pull method for producing TFT liquid crystal glass substrates, the long roller is a very critical component of the molding process during infiltration and emergency. The rotation of the long roller is mainly limited by the bearings at both ends of the long roller, and then the bearing uses the crank arm rotating around the fixed rotating axis as the base to realize the rotation of the long roller and the opening and closing of the two long rollers.

[0004] The crank arm is installed on a fixed shaft, and then the crank arm lock nut structure composed of a positioning sleeve and a limit sleeve is used to limit the position. However, in the prior art, the space where the crank arm shaft is located is extremely limited, and due to the long-term high temperature environment, the positioning sleeve and the limit sleeve are often stuck and cannot be removed. Summary of the invention

[0005] The object of the present invention is to provide a crank arm limiting structure to solve the problem that the space for the crank arm shaft in the prior art proposed in the above background technology is extremely limited, and due to long-term high temperature environment, the positioning sleeve and the limiting sleeve are often stuck and cannot be removed.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a crank arm limiting structure, comprising a crank arm, a positioning sleeve and a crank arm rotating shaft, the crank arm and the positioning sleeve are sleeved on the crank arm rotating shaft, and the positioning sleeve is installed on the crank arm rotating shaft through a lock nut, the positioning sleeve is sleeved on the copper pad and the limiting clamp, a limiting ring groove is arranged on the outer side surface of the positioning sleeve, the limiting clamp comprises a limiting frame, and the limiting frame adopts a U-shaped limiting frame structure.

[0007] As a further technical solution, a movable groove is opened in the limit frame, and an end cover is installed at the front end of the limit frame through a locking screw. Movable block one and movable block two are slidably connected in the limit frame, and the crank arm shaft is located between movable block one and movable block two.

[0008] As a further technical solution, a locking block is installed between the movable block 2 and the end cover, a connecting screw hole is opened in the middle of the locking block, and a screw is threadedly connected to the locking block.

[0009] As a further technical solution, the wedge block, locking block, movable block 2 and end cover are assembled together, and the wedge block, locking block, movable block 2 and end cover are all detachable structures.

[0010] As a further technical solution, the inner side wall of the limit frame is symmetrically provided with limit strips, and the movable block 1, movable block 2 and locking block are all provided with limit grooves, and the limit strips are clamped in the limit grooves.

[0011] As a further technical solution, a front snap-in slot is provided on the front side of the movable block 2, and a first slider is provided on both the left and right side surfaces of the movable block 2, and a first wedge-shaped groove is provided on the upper end surface of the movable block 2, and a second slider is provided on both the left and right side surfaces of the end cover, and a second wedge-shaped groove is provided on the upper end surface of the end cover.

[0012] As a further technical solution, the movable block 2, the locking block and the end cover are installed together by two sets of fastening bolts, and a wedge block is embedded between the first wedge groove and the second wedge groove, and a screw hole is opened in the middle of the wedge block, and a screw is installed between the screw hole in the middle of the wedge block and the screw hole in the middle of the locking block.

[0013] As a further technical solution, multiple groups of inner anti-slip strips are arranged on the inner side wall of the positioning sleeve, and an outer ring is fixed in the middle of the outer ring surface of the positioning sleeve, and multiple groups of outer anti-slip strips are arranged on the outer ring surface of the outer ring, and both the inner and outer anti-slip strips are made of rubber.

[0014] As a further technical solution, an inner groove is opened on the rear inner wall of the limit frame, inner pads are arranged on the left and right parts of the inner groove, and side grooves are opened on the left and right inner walls of the limit frame, side pads are arranged on the inner side of the side grooves, and a group of limit strips are arranged on the upper and lower sides of the side grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The wedge block is driven by a screw to clamp the positioning sleeve, thus achieving axial limit in a limited space;

[0017] 2. The anti-loosening nut at the end of the positioning sleeve can prevent the positioning sleeve thread from loosening and causing the limit failure; the combination of the positioning sleeve and the limit clamp can effectively realize the normal removal of the limit clamp after the positioning sleeve thread is stuck, thereby realizing the normal disassembly and assembly of the crank arm;

[0018] 3. The copper pad between the crank arm and the limit clamp can effectively reduce the friction caused by the rotation of the crank arm to the clamp, which not only better protects the technical structure, but also ensures the stability of the operation between the technical structures;

[0019] 4. The fixture adopts the clamping method of two movable blocks. The clamping position can be selected according to actual production needs, thereby achieving an adjustable limit position within the design margin;

[0020] 5. Ways to remove the limiter include removing the positioning sleeve, moving the wedge block, or removing the end cover of the fixture. There are multiple removal methods to choose from. Even in harsh environments such as high temperature, which may cause some threads to get stuck, the limiter can be removed normally.

[0021] 6. In the present invention, the movable block 2, the locking block and the end cover are installed together by fastening screws, and a wedge block is embedded between the movable block 2 and the upper end surface of the end cover. After being firmly combined together, they slide into the limit frame, so that they can be squeezed on one side of the outer ring surface of the positioning sleeve, so as to achieve the purpose of clamping the positioning sleeve for limiting.

[0022] 7. In the present invention, the positioning sleeve uses the inner anti-slip strip on the inner ring wall to prevent slipping with the inner sleeved component, and the outer ring arranged in the middle of the outer ring surface of the positioning sleeve is conveniently sleeved between the side groove and the inner groove, so that it is not easy to fall off, and the outer anti-slip strip arranged on the outer ring surface of the outer ring plays an anti-slip treatment with the limit frame, so that the installation is safer and more reliable.

[0023] 8. The inner groove and side groove in the limit frame of the present invention are provided to stabilize the outer sleeve ring, the inner pad and side pad are provided to reduce the mutual wear between the positioning sleeve and the limit frame, and the side groove is provided to facilitate the outer sleeve ring in the middle of the outer ring surface of the positioning sleeve to enter the movable groove to prevent the positioning sleeve from sliding down, so as to ensure the high stability of the position of the positioning sleeve, so that the crank arm limit is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the limiting structure of the present invention in the installed state;

[0025] Figure 2 It is an exploded schematic diagram of some parts of the limit frame described in the structure of the present invention;

[0026] Figure 3 A half-section schematic diagram of the structure of the present invention;

[0027] Figure 4 It is a top view schematic diagram showing the structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the positioning sleeve of the structure of the present invention being assembled in a limiting frame;

[0029] Figure 6 It is a cross-sectional schematic diagram of the positioning sleeve of the structure of the present invention assembled in the limiting frame;

[0030] Figure 7 It is a schematic diagram of the assembly between the wedge block, the second movable block, the locking block and the end cover of the structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the limit frame structure of the structure of the present invention.

[0032] In the figure: 1. crank arm; 2. copper pad; 3. movable groove; 4. anti-loosening nut; 5. positioning sleeve; 50. limiting ring groove; 51. outer ring; 52. outer anti-skid strip; 53. inner anti-skid strip; 6. crank arm shaft; 7. limiting frame; 70. inner groove; 71. inner pad; 72. side groove; 73. side pad; 8. screw; 9. wedge block; 10. movable block one; 11. locking block; 12. movable block two; 120. first slider; 121. front snap-in; 122. first wedge groove; 13. end cover; 130. second wedge groove; 131. second slider; 14. limiting strip; 15. limiting clamp. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the technical solutions proposed by the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Specific implementation method 1, see Figure 1-8 The present invention provides a technical solution: a crank arm limiting structure, comprising a crank arm 1, a positioning sleeve 5 and a crank arm rotating shaft 6, the crank arm 1 and the positioning sleeve 5 are sleeved on the crank arm rotating shaft 6, and the positioning sleeve 5 is installed on the crank arm rotating shaft 6 through a locking nut 4, the positioning sleeve 5 is sleeved with a copper pad 2 and a limiting clamp 15, a limiting ring groove 50 is arranged on the outer side surface of the positioning sleeve 5, the limiting clamp 15 comprises a limiting frame 7, and the limiting frame 7 adopts a U-shaped limiting frame structure.

[0036] In this embodiment, a movable groove 3 is opened in the limit frame 7, and an end cover 13 is installed at the front end of the limit frame 7 through a locking screw, a movable block 10 and a movable block 2 12 are slidably connected in the limit frame 7, and the crank arm shaft 6 is located between the movable block 10 and the movable block 2 12.

[0037] Specific implementation method 2: This implementation method is a further limitation of specific implementation method 1. The present invention utilizes a screw to drive the movement of a wedge block to achieve clamping of the positioning sleeve by the fixture, thereby achieving axial limitation in a limited space.

[0038] In this embodiment, a locking block 11 is installed between the movable block 2 12 and the end cover 13, and a connecting screw hole is opened in the middle of the locking block 11, and a screw 8 is threadedly connected to the locking block 11; the wedge block 9, the locking block 11, the movable block 2 12 and the end cover 13 are assembled together, and the wedge block 9, the locking block 11, the movable block 2 12 and the end cover 13 are all detachable structures.

[0039] Specific implementation method three, this implementation method is a further limitation of specific implementation method one. In the present invention, the anti-loosening nut at the end of the positioning sleeve can prevent the positioning sleeve thread from loosening and causing the limit failure; by utilizing the combination of the positioning sleeve and the limit clamp, the limit clamp can be effectively removed normally after the positioning sleeve thread is stuck, thereby realizing the normal disassembly and assembly of the crank arm.

[0040] In this embodiment, the positioning sleeve 5 is provided with a copper pad 2 and a limiting clamp 15 .

[0041] Specific implementation method four. This implementation method is a further limitation of specific implementation method one. The copper pad between the crank arm and the limit clamp in the present invention can effectively reduce the friction of the clamp caused by the rotation of the crank arm, so as to reduce the wear between the crank arm and the clamp, which not only better protects the technical structure, but also ensures the stability of operation between the technical structures.

[0042] In this embodiment, two limit bars 14 are symmetrically provided on the inner side wall of the limit frame 7, and limit grooves are provided on the movable block 10, the movable block 2 12, and the locking block 11, and the limit bars 14 are clamped in the limit grooves.

[0043] Specific implementation method five: This implementation method is a further limitation of specific implementation method one. The clamp in the present invention adopts a clamping method of two movable blocks, and the clamping position can be selected according to actual production needs, thereby achieving an adjustable limit position within the design margin.

[0044] In this embodiment, a front snap-in slot 121 is provided on the front side of the movable block 12, and a first slider 120 is provided on both the left and right side surfaces of the movable block 12, and a first wedge-shaped groove 122 is provided on the upper end surface of the movable block 12, and a second slider 131 is provided on both the left and right side surfaces of the end cover 13, and a second wedge-shaped groove 130 is provided on the upper end surface of the end cover 13, and the positioning sleeve 5, the wedge block 9 and the end cover 13 are all detachable structures.

[0045] Specific implementation method six, this implementation method is a further limitation of specific implementation method one. The method of removing the limit in the present invention includes removing the positioning sleeve or moving the wedge block or removing the fixture end cover. There are multiple removal methods to choose from. Even in harsh environments such as high temperature that may cause some threads to get stuck, the limit can be removed normally. It is more durable, safe and reliable.

[0046] In this embodiment, a front snap-in 121 is provided on the front side of the movable block 12, and a first slider 120 is provided on both the left and right side surfaces of the movable block 12, and a first wedge-shaped groove 122 is provided on the upper end surface of the movable block 12, and a second slider 131 is provided on both the left and right side surfaces of the end cover 13, and a second wedge-shaped groove 130 is provided on the upper end surface of the end cover 13; the movable block 12, the locking block 11 and the end cover 13 are installed together by two sets of fastening bolts, and a wedge block 9 is embedded between the first wedge-shaped groove 122 and the second wedge groove 130, and a screw hole is provided in the middle of the wedge block 9, and a screw 8 is installed between the screw hole in the middle of the wedge block 9 and the screw hole in the middle of the locking block 11.

[0047] Specific implementation method seven, in the present invention, the movable block 2 12, the locking block 11 and the end cover 13 are installed together by fastening screws, and a wedge block 9 is embedded between the upper end surface of the movable block 2 12 and the end cover 13. After being combined together and firmly, they slide into the limit frame 7, so that they can be squeezed on one side of the outer ring surface of the positioning sleeve 5, so as to achieve the purpose of clamping the positioning sleeve 5 for limiting.

[0048] In this embodiment, a plurality of sets of inner anti-slip strips 53 are arranged on the inner wall of the positioning sleeve 5, and an outer ring 51 is fixed in the middle of the outer ring surface of the positioning sleeve 5, and a plurality of sets of outer anti-slip strips 52 are arranged on the outer ring surface of the outer ring 51, and both the inner anti-slip strips 53 and the outer anti-slip strips 52 are made of rubber.

[0049] Specific embodiment eight, in the present invention, the positioning sleeve 5 is anti-slipped with the inner sleeve component through the inner anti-slip strip 53 on the inner ring wall, and the outer ring 51 arranged in the middle of the outer ring surface of the positioning sleeve 5 is conveniently sleeved between the side groove 72 and the inner groove 70, so that it is not easy to fall off, and the outer anti-slip strip 52 arranged on the outer ring surface of the outer ring 51 plays an anti-slip role with the limit frame 7, so that the installation is safer and more reliable.

[0050] In this embodiment, an inner groove 70 is opened on the rear inner wall of the limit frame 7, and inner pads 71 ​​are provided on the left and right parts of the inner groove 70, and side grooves 72 are opened on the left and right inner walls of the limit frame 7, and side pads 73 are provided on the inner side of the side grooves 72, and a group of limit strips 14 are provided on the upper and lower sides of the side grooves 72.

[0051] Specific implementation method nine, the inner groove 70 and the side groove 72 in the limit frame 7 of the present invention are set to stabilize the insertion of the outer ring 51, the inner pad 71 and the side pad 73 are set to reduce the mutual wear between the positioning sleeve 5 and the limit frame 7, and the side groove 72 is set to facilitate the outer ring 51 in the middle of the outer ring surface of the positioning sleeve 5 to enter the movable groove 3, so as to prevent the positioning sleeve 5 from sliding down, so as to ensure the high stability of the position of the positioning sleeve 5, so that the crank arm limit is safer and more reliable.

[0052] When using the crank arm limiting structure, first embed the movable block 2 12 into the front part of the limiting frame 7, and at the same time, the left and right ends of the movable block 2 12 are slidably connected in the limiting strip 14, and the locking block 11 is assembled between the movable block 2 12 and the lower part of the end cover 13. Then, the wedge block 9 is installed in the wedge groove set on the upper end surface of the movable block 2 12 and the end cover 13 by screws 8. At this time, multiple sets of locking screws are installed between the front side surface of the end cover 13 and the screw holes on the front side surface of the limiting frame 7 for tightening, thereby achieving the purpose of limiting the crank arm.

[0053] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crank arm limiting structure, characterized in that: The invention comprises a crank arm (1), a positioning sleeve (5) and a crank arm rotating shaft (6); the crank arm rotating shaft (6) is sleeved with the crank arm (1) and the positioning sleeve (5), and the positioning sleeve (5) is installed on the crank arm rotating shaft (6) through a locking nut (4); the positioning sleeve (5) is sleeved with a copper pad (2) and a limiting clamp (15); a limiting ring groove (50) is arranged on the outer side surface of the positioning sleeve (5); the limiting clamp (15) comprises a limiting frame (7), and the limiting frame (7) adopts a U-shaped limiting frame structure.

2. The crank arm limiting structure according to claim 1, characterized in that: A movable groove (3) is provided in the limit frame (7), and an end cover (13) is installed at the front end of the limit frame (7) through a locking screw. A movable block 1 (10) and a movable block 2 (12) are slidably connected in the limit frame (7), and the crank arm shaft (6) is located between the movable block 1 (10) and the movable block 2 (12).

3. The crank arm limiting structure according to claim 2, characterized in that: A locking block (11) is installed between the movable block 2 (12) and the end cover (13), a connecting screw hole is opened in the middle of the locking block (11), and a screw (8) is threadedly connected to the locking block (11).

4. The crank arm limiting structure according to claim 2, characterized in that: The wedge block (9), the locking block (11), the second movable block (12) and the end cover (13) are assembled together, and the wedge block (9), the locking block (11), the second movable block (12) and the end cover (13) are all detachable structures.

5. The crank arm limiting structure according to claim 2, characterized in that: The limiting strips (14) are symmetrically arranged on the inner side walls of the left and right parts of the limiting frame (7), and the movable block 1 (10), the movable block 2 (12) and the locking block (11) are all provided with limiting grooves, and the limiting strips (14) are clamped in the limiting grooves.

6. The crank arm limiting structure according to claim 2, characterized in that: The movable block 2 (12) is provided with a front snap-in opening (121) on its front side, and first sliders (120) are provided on both left and right side surfaces of the movable block 2 (12), and a first wedge-shaped groove (122) is provided on the upper end surface of the movable block 2 (12), and second sliders (131) are provided on both left and right side surfaces of the end cover (13), and a second wedge-shaped groove (130) is provided on the upper end surface of the end cover (13).

7. The crank arm limiting structure according to claim 2, characterized in that: The movable block 2 (12), the locking block (11) and the end cover (13) are mounted together by two sets of fastening bolts, and a wedge block (9) is embedded between the first wedge groove (122) and the second wedge groove (130), and a screw hole is opened in the middle of the wedge block (9), and a screw (8) is installed between the screw hole in the middle of the wedge block (9) and the screw hole in the middle of the locking block (11).

8. The crank arm limiting structure according to claim 1, characterized in that: A plurality of groups of inner anti-slip strips (53) are arranged on the inner side wall of the positioning sleeve (5), an outer ring (51) is fixed in the middle of the outer ring surface of the positioning sleeve (5), and a plurality of groups of outer anti-slip strips (52) are arranged on the outer ring surface of the outer ring (51), and both the inner anti-slip strips (53) and the outer anti-slip strips (52) are made of rubber material.

9. The crank arm limiting structure according to claim 1, characterized in that: An inner groove (70) is provided on the inner side wall of the rear portion of the limit frame (7), inner pads (71) are provided on both the left and right portions of the inner groove (70), side grooves (72) are provided on both the left and right inner side walls of the limit frame (7), side pads (73) are provided on the inner side of the side grooves (72), and a group of limit strips (14) are provided on both the upper and lower sides of the side grooves (72).

Images