Anti-tilting mechanism of crown block

Abstract

The utility model provides a crown block anti-tilt mechanism which comprises a mounting plate, a fixing unit and a driving unit, and the mounting plate is used for being connected with a crown block; the fixing unit comprises two clamping blocks, and the clamping blocks are arranged on the mounting plate in a sliding manner; the driving unit comprises two cam transmission plates, and each cam transmission plate corresponds to one clamping block and is in transmission connection with the clamping block; the two cam transmission plates can drive the corresponding clamping blocks to synchronously move back to back or face to face in the transverse direction of the crown block, so that the clamping blocks have a first state in which the clamping blocks abut against and are matched with flanges of a crown block operation guide rail and a second state in which the clamping blocks are separated from the flanges. The problems that in the prior art, in the using process of an anti-tilting mechanism of a crown block, motor torque consumption is large, and dust is likely to be generated are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of overhead crane equipment, and particularly relates to an anti-tilt mechanism for an overhead crane. Background Art

[0002] In the field of semiconductor logistics automation, especially in wafer handling systems, overhead hoist transport, as a core carrier, faces particularly prominent stability challenges when performing lateral wafer grabbing tasks at special locations.

[0003] Due to the use of a suspension structure design, the extended grabbing action inevitably causes the center of gravity of the trolley to shift, resulting in imbalance, which seriously affects the precise docking with the wafer loading platform, which is a major bottleneck restricting semiconductor production efficiency and wafer safety. Early anti-tilt solutions, such as those described in CN202123329492.3, adopted a gear rack mechanism to drive the anti-tilt hook to slide along the track for fixation, but the implementation of this solution was limited by several key defects: the first problem was that the cleanliness level did not meet the standard and was not compatible with the strict requirements of semiconductor manufacturing for a dust-free environment; secondly, the direction of movement of the hook needed to be manually preset before use, and the operation process was cumbersome and had low stability; even worse, there was a lack of a stable mechanical self-locking structure, and it relied entirely on the motor to maintain the clamping state, which increased energy consumption and reduced the long-term reliability of the system.

[0004] In view of the above-mentioned deficiencies of the prior art, there is an urgent need for an innovative overhead crane anti-tilt mechanism, which aims to achieve efficient and stable functions through sophisticated mechanical design, so as to solve the problems of low stability, large motor torque consumption and easy dust generation during use of the overhead crane anti-tilt mechanism in the prior art. Utility Model Content

[0005] The utility model aims to provide a crane anti-tilt mechanism to solve the problems of low stability and easy generation of dust in the prior art crane anti-tilt mechanism.

[0006] In order to achieve the above-mentioned purpose of the utility model, an embodiment of the utility model provides a crown block anti-tilt mechanism, comprising:

[0007] A mounting plate, used for connection with the overhead travelling crane;

[0008] A fixing unit, comprising two clamping blocks, wherein the clamping blocks are slidably arranged on the mounting plate;

[0009] The driving unit includes two cam transmission plates, each of which is arranged corresponding to a card block and is connected to the card block in a transmission manner; wherein the two cam transmission plates can drive the corresponding card blocks to move synchronously in opposite directions or toward each other in the lateral direction of the overhead traveling crane, so that the card blocks have a first state in which they are abutted against the retaining edge of the overhead traveling crane running guide rail and a second state in which they are separated from the retaining edge.

[0010] As a further improvement of an embodiment of the utility model, when the clamping block is in the first state, the cam transmission plate and the clamping block are interlocked through a mechanical structure to ensure that the two maintain a stable connection in the absence of external force.

[0011] As a further improvement of an embodiment of the utility model, the blocking block has a guide portion protruding toward the cam transmission plate, and a guide long groove is provided on the cam transmission plate. The guide long groove is extended along the transverse direction and the longitudinal direction of the overhead crane, and the guide portion is slidably arranged in the guide long groove. When the blocking block is in the first state, a side groove wall of the guide long groove located in the longitudinal direction is engaged with the guide portion to form an interlocking relationship.

[0012] As a further improvement of one embodiment of the utility model, the driving unit includes a connecting plate connecting the two cam transmission plates, a screw rod and a driving member, the driving member is arranged on the mounting plate and cooperates with the screw rod transmission to drive the screw rod to pivot, the screw rod is passed through the connecting plate and can be driven to drive the connecting plate to move in the longitudinal direction of the overhead crane.

[0013] As a further improvement of an embodiment of the utility model, it also includes a sensing device, which includes a sensing sheet, a first sensing element and a second sensing element. A long avoidance hole is provided on the mounting plate along the longitudinal extension. The sensing sheet is arranged on the connecting plate and passes through the long avoidance hole. The first sensing element and the second sensing element are arranged on the mounting plate and are respectively located near the two side walls of the long avoidance hole in the longitudinal direction to sense the position of the sensing sheet.

[0014] As a further improvement of an embodiment of the utility model, the two end surfaces of the clamping block in the transverse direction are configured as inclined surfaces for abutting against the retaining edge.

[0015] As a further improvement of an embodiment of the utility model, it also includes a nylon block, and the nylon block is arranged on the inclined surface.

[0016] As a further improvement of an embodiment of the utility model, it also includes a gasket, and the gasket is arranged between the nylon block and the inclined surface.

[0017] As a further improvement of an embodiment of the utility model, two first guide rails are relatively arranged on the mounting plate along the transverse direction, the first guide rails are extended along the longitudinal direction of the overhead travelling vehicle, and the two cam transmission plates are respectively slidably arranged on the two first guide rails.

[0018] As a further improvement of an embodiment of the utility model, two second guide rails are arranged at intervals along the lateral direction on the mounting plate, the second guide rails are extended along the lateral direction, and the two clamping blocks are respectively slidably arranged on the two second guide rails.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The two clamping blocks are driven to move synchronously in opposite directions and thus abut against the baffle at the same time, thereby ensuring the stability of the overhead crane when grabbing parts and preventing it from tipping to one side; and in the process of the clamping blocks abutting against the baffle, the friction movement is reduced, thereby effectively reducing the generation of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a crown block anti-tilt mechanism and a running guide rail provided in one embodiment of the utility model;

[0022] Figure 2 for Figure 1 The enlarged view of the N position in the middle;

[0023] Figure 3 A schematic diagram of the structure of an anti-tilt mechanism for a crown block provided in one embodiment of the utility model;

[0024] Figure 4 for Figure 3 A top view of

[0025] Figure 5 for Figure 4 A schematic diagram of the structure when the block in the embodiment abuts against the retaining edge;

[0026] Figure 6 for Figure 3 A structural diagram of the anti-tilt mechanism of the overhead crane from another perspective;

[0027] Figure 7 for Figure 6 Enlarged view of the O position in the middle.

[0028] The above description of the drawings includes the following reference numerals:

[0029] 100, running guide rail; 101, retaining edge; 1011, abutting portion;

[0030] 1. Mounting plate; 11. First guide rail; 12. Second guide rail; 13. Long avoidance hole;

[0031] 2. a card block; 21. a guide portion; 22. an inclined surface;

[0032] 3. driving unit; 31. cam transmission plate; 311. guide long groove; 3111. first straight line segment; 3112. second straight line segment; 3113. third straight line segment; 32. connecting plate; 321. nut; 33. lead screw; 34. driving member;

[0033] 4. Sensing device; 41. Sensing sheet; 42. First sensing element; 43. Second sensing element;

[0034] 5. Nylon block;

[0035] 6. Gasket. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0038] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0039] In order to solve the problems of low stability and easy generation of dust in the prior art anti-tilt mechanism of a crane, the utility model provides a new anti-tilt mechanism of a crane.

[0040] refer to Figure 1-7 As shown, the utility model provides an anti-tilt mechanism for a crane, comprising a mounting plate, a fixing unit and a driving unit. The mounting plate 1 is used to connect with the crane; the fixing unit comprises two clamping blocks 2, and the clamping blocks 2 are slidably arranged on the mounting plate 1.

[0041] Furthermore, the driving unit 3 includes two cam transmission plates 31, each of which is arranged corresponding to a block 2 and is transmission-connected with the block; wherein the two cam transmission plates 31 can drive the corresponding blocks 2 to move synchronously in opposite directions or toward each other in the lateral direction of the overhead crane, so that the block 2 has a first state in which it is abutted against the retaining edge 101 of the overhead crane running guide rail 100 and a second state in which it is separated from the retaining edge 101.

[0042] refer to Figure 1-2 As shown in the figure, a running guide rail 100 of an overhead crane is shown, and the running guide rail 100 has ribs 101 on both sides, and the two ribs 101 are arranged at intervals along the lateral direction of the overhead crane. When the wheels of the overhead crane stay on the guide rail for grabbing, the two clamping blocks 2 move toward the baffles 101 on both sides and respectively abut against the two baffles 101, thereby playing a stabilizing role.

[0043] In the present invention, the running rail of the overhead travelling crane can be made of profiles, the two side walls of the profiles form the ribs 101, and the ribs have abutment portions 1011. In the first state, the two clamping blocks 2 are driven to move synchronously in opposite directions, abutting against the ribs 101, thereby reducing the generation of dust.

[0044] Furthermore, when the two clamping blocks 2 are driven to move synchronously, the wheels of the overhead travelling crane can be kept at the predetermined positions on the running guide rails 100 during the process of the clamping blocks 2 abutting against the retaining edges 101, so that the overhead travelling crane has good stability. However, in the prior art, when the clamping blocks 2 are clamped into the clamping slots, there will be a problem of asynchrony, which may easily cause the overhead travelling crane to tip to one side, thus affecting the stability of the overhead travelling crane.

[0045] It can be understood that the utility model drives the two blocks 2 to move synchronously in opposite directions, thereby abutting against the retaining edge 101 at the same time, so as to ensure that the overhead crane has good stability when it stops grabbing parts and avoid it from tipping to one side; and because the block 2 and the baffle 101 are abutted and matched, the dust generated by friction when the block is inserted into the slot in the prior art is avoided, thereby achieving the effect of reducing dust.

[0046] Furthermore, when the clamping block 2 is in the first state, the cam transmission plate 31 and the clamping block 2 are interlocked through a mechanical structure to ensure that the two maintain a stable connection without external force.

[0047] With such arrangement, when in the first state, the block 2 can be maintained in contact with the retaining edge 101 without transmitting power to the cam transmission plate 31, thereby achieving energy saving and effectively extending the life of the driving member driving the cam transmission plate 31.

[0048] Furthermore, in the first state, the block 2 abuts against the retaining edge 101 , the overturning moment is borne by the block 2 , the cam transmission plate 31 and the guide portion 21 , and the lead screw 33 and the drive member 34 are not subjected to force, thereby avoiding damage to the lead screw 33 and the drive member 34 .

[0049] Specific to Figure 1 When the crane grabs the parts from the left side, the overturning moment is shown as M in the figure. At this time, the pressure exerted by the retaining edge 101 on the clamping block 2 is shown as F in the figure. The overturning moment is borne by the clamping block 2, the cam transmission plate 31 and the guide part 21.

[0050] In this embodiment, reference Figure 4 As shown, the block 2 has a guide portion 21 protruding toward the cam transmission plate 31, and the cam transmission plate 31 is provided with a guide slot 311, which is extended along the horizontal direction and the longitudinal direction of the overhead travelling vehicle, and the guide portion 21 is slidably disposed in the guide slot 311. When the guide portion 21 slides in the guide slot 311, the corresponding block 2 can be driven to move in the horizontal direction of the overhead travelling vehicle.

[0051] In this embodiment, the lateral direction of the overhead travelling crane is Figure 2 The x-axis is in the direction of the crane, and the longitudinal direction is Figure 2 The direction of the y-axis.

[0052] It should be noted that when the guide portion 21 is slidably disposed in the guide slot 311, the guide portion can slide inside the guide slot 311. In order to relatively reduce the friction resistance when the guide portion 21 slides in the guide slot 311, the guide portion 21 is usually configured to be cylindrical.

[0053] It should be emphasized that when the clamping block 2 is in the first state, a side wall of the guiding long groove 311 in the y-axis direction is engaged with the guiding portion 21 to form an interlocking engagement.

[0054] Specifically corresponding to Figure 5 As shown, the guide slot includes a first straight line segment 3111 and a second straight line segment 3112 arranged in parallel to the y-axis direction, and a third straight line segment 3113. The first straight line segment 3111 and the second straight line segment 3112 are arranged in a spaced relationship along the x-axis direction, so that there is a certain distance d between the first straight line segment 3111 and the second straight line segment 3112 in a direction parallel to the x-axis, and the distance d generally determines the travel of the corresponding block 2 in the x-axis direction.

[0055] Generally speaking, the second straight segment 3112 is closer to the side walls on both sides of the track, and the third straight segment 3113 usually forms a certain angle with the y-axis. In this embodiment, the angle is an acute angle, preferably, the acute angle can be 45°. The two ends of the third straight segment 3113 are smoothly connected to the first straight segment 3111 and the second straight segment 3112 respectively through arc-shaped connecting parts, so that the guide portion 21 can move more smoothly in the guide slot 311.

[0056] Corresponding to Figure 4 As shown in the figure, the long guide grooves located on the two cam transmission plates 31 form an inverted eight-shaped shape as shown in the figure.

[0057] In some embodiments, the two guide slots 311 can also form a regular "X" shape on the cam transmission plate 31. The utility model has no fixed requirements for the shape setting of the guide slots 311. When the guide portion 21 slides in the guide slots 311, it can drive the block 2 to move synchronously toward or away from each other in the x-axis direction, which meets the design requirements of the utility model. Designers can set it according to actual needs. All schemes that are the same or similar to the present embodiment are covered within the protection scope of the utility model.

[0058] Referring to this embodiment Figure 4 It is arranged that when the clamping block 2 is in the first state, the guiding portion 21 is clamped in the second straight segment 3112 and cooperates with the groove wall of the second straight segment 3112 to form an interlocking.

[0059] Further, refer to Figure 2 As best shown in the embodiment, the driving unit 3 further comprises a connecting plate 32, a screw rod 33 and a driving member 34 connecting the two cam transmission plates. The driving member 34 is arranged on the mounting plate 1 and cooperates with the screw rod 33 to drive the screw rod 33 to pivot. The screw rod 33 is passed through the connecting plate 32 and can be driven to drive the connecting plate 32 to move in the longitudinal direction of the overhead travelling vehicle. Figure 2 Movement in the direction of the y-axis.

[0060] In this way, the pivoting movement of the driving screw rod 33 can drive the connecting plate 32 to move linearly in the y-axis direction, and the two cam transmission plates 31 are fixedly connected to the connecting plate 32. The movement of the connecting plate 32 drives the two cam transmission plates 31 to move synchronously, thereby driving the two guide parts 21 to slide in the guide grooves 311 of the two cam transmission plates 31 respectively, and then the two blocks move synchronously along the x-axis direction. The synchronous movement includes synchronous back-to-back movement and synchronous opposite movement.

[0061] In this embodiment, the driving member 34 can be configured as a pivot motor, and the screw rod 33 can be connected to the power output end of the pivot motor. When the driving member 34 is working, it can drive the screw rod 33 to pivot.

[0062] It should be noted that in the present embodiment, an internal threaded hole may be provided on the connecting plate 32, and the screw rod 33 is passed through the internal threaded hole and cooperates with the hole wall of the internal threaded hole. When the screw rod is driven to pivot, the screw rod 33 moves relative to the hole wall of the internal threaded hole, so that the connecting plate 32 can move linearly in the y-axis direction.

[0063] Preferably, in this embodiment, a nut 321 may be further provided on the connecting plate 32, and the screw rod 33 is inserted into the nut 321 and is threadedly engaged with the nut 321. With such an arrangement, the screw rod 33 can have better stability when interacting with the nut through its spiral lines.

[0064] Of course, in some embodiments, the nut 321 can be embedded in the connecting plate 32, and then the screw rod 33 is passed through the nut 321. Such an arrangement makes the entire mechanism more compact.

[0065] Next, refer to Figure 6 As shown, the anti-tilt mechanism of the overhead travelling vehicle provided in this embodiment further includes a sensing device 4, the sensing device 4 includes a sensing sheet 41, a first sensing element 42 and a second sensing element 43, a long avoidance hole 13 is provided on the mounting plate 1 along the longitudinal extension, the sensing sheet 41 is arranged on the connecting plate 32 and penetrates the long avoidance hole 13, the first sensing element 42 and the second sensing element 43 are arranged on the mounting plate 1, and are respectively arranged at positions close to the two side walls of the long avoidance hole 13 in the longitudinal direction. The first sensing element 42 and the second sensing element 43 can sense the position of the sensing sheet 41 in the long avoidance hole 13, when the block 2 is in the first state, correspondingly, the sensing sheet 41 is located at a specific position in the long avoidance hole 13, when the first sensing element 42 and the second sensing element 43 sense that the sensing sheet 41 is located at a specific position, the first sensing element 42 and / or the second sensing element 43 can send a signal to the driving member 34, and the driving member 34 can stop transmitting power to achieve the effect of energy saving.

[0066] Specifically, in this embodiment, the first sensing element 42 and the second sensing element 43 sense the presence of the sensing sheet 41 by the sensing sheet 41 entering therein, and when the sensing sheet 41 enters the first sensing element 42, the first sensing element 42 can send a first signal to the driving member 34, and when the sensing sheet 41 enters the second sensing element 43, the second sensing element 43 can send a second signal to the driving member 34. The first signal and the second signal can be set as control signals to stop the driving member 34 from operating.

[0067] In some embodiments, the first sensing element 42 and the second sensing element 43 can be configured as a remote distance measuring device, such as an infrared distance meter, an electromagnetic wave distance meter, etc. In the utility model, the position of the sensing sheet 41 is determined, and then a signal is sent to the driving member 34. Therefore, the selection of the first sensing element 42 and the second sensing element 43 is not limited in the utility model. The operator can set them according to actual needs. All design methods similar to the utility model are included in the scope of protection of the utility model.

[0068] Next reference Figure 3 , Figure 7 As shown, both end faces of the block 2 in the transverse direction are configured as inclined surfaces 22 for abutting against the retaining edge 101. The provision of the inclined surfaces 22 is more conducive to the abutment between the end faces of the block 2 and the retaining edge 101.

[0069] Preferably, the retaining edge 101 has an abutment portion 1011 that matches the inclined surface 22, and the abutment portion 1011 is configured as an inclined surface that matches the inclined surface 22. Thus, the abutment portion 1011 can apply a vertical force to the inclined surface 22, such as Figure 1 Indicated by F.

[0070] Optionally, the crown block anti-tilt mechanism may further include a nylon block 5, which is disposed on the inclined surface 22. The nylon block has the characteristics of high strength, high hardness and wear resistance, and is disposed on the inclined surface 22. When the inclined surface 22 abuts against the abutment portion 1011, it is more conducive to reducing the generation of dust.

[0071] Furthermore, the anti-tilt mechanism of the overhead travelling crane may further include a gasket 6, which is disposed between the nylon block 5 and the inclined surface 22. The thickness can be adjusted by using gaskets of different thicknesses, so that the inclined surface 22 of the block 2 can better cooperate with the nylon block 5 and the gasket 6 to achieve a better buffering effect.

[0072] Next, refer to Figure 4 As shown, two first guide rails 11 are relatively arranged on the mounting plate 1 along the transverse direction (x-axis), the first guide rails 11 are extended along the longitudinal direction (y-axis) of the overhead travelling crane, and the two cam transmission plates 31 are slidably arranged on the two first guide rails 11 respectively.

[0073] Next, refer to Figure 3 As shown, two second guide rails 12 are spaced apart on the mounting plate 1 along the transverse direction (x-axis), the second guide rails 12 are extended along the transverse direction (x-axis), and the two clamping blocks 31 are slidably disposed on the two second guide rails 12 respectively.

[0074] In summary, the embodiments of the present invention achieve the following technical effects:

[0075] 1) The two clamping blocks 2 are driven to move synchronously in opposite directions, thereby synchronously contacting with the retaining edge, thereby ensuring the stability of the overhead traveling vehicle trolley;

[0076] 2) During the contact between the block 2 and the retaining edge 101, since no relative friction occurs, the generation of dust can also be reduced;

[0077] 3) When the clamping block 2 is in the first state, the cam transmission plate 31 and the clamping block 2 are interlocked through a mechanical structure to ensure that the two maintain a stable connection without external force, thereby achieving energy saving.

[0078] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0079] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0080] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0081] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crane anti-tilt mechanism, characterized in that: include: A mounting plate, used for connection with the overhead travelling crane; A fixing unit, comprising two clamping blocks, wherein the clamping blocks are slidably arranged on the mounting plate; The driving unit includes two cam transmission plates, each of which is arranged corresponding to a card block and is connected to the card block in a transmission manner; wherein the two cam transmission plates can drive the corresponding card blocks to move synchronously in opposite directions or toward each other in the lateral direction of the overhead traveling crane, so that the card blocks have a first state in which they are abutted against the retaining edge of the overhead traveling crane running guide rail and a second state in which they are separated from the retaining edge.

2. The anti-tilt mechanism of the overhead travelling crane according to claim 1, characterized in that: When the clamping block is in the first state, the cam transmission plate and the clamping block are interlocked through a mechanical structure to ensure that the two maintain a stable connection without external force.

3. The anti-tilt mechanism of the overhead travelling crane according to claim 2, characterized in that: The card block has a guide portion protruding toward the cam transmission plate, and the cam transmission plate is provided with a guide long groove, and the guide long groove is extended along the horizontal direction and the longitudinal direction of the overhead crane. The guide portion is slidably set in the guide long groove. When the card block is in the first state, a side groove wall of the guide long groove located in the longitudinal direction is engaged with the guide portion to form an interlocking.

4. The anti-tilt mechanism of the overhead travelling crane according to claim 1, characterized in that: The driving unit includes a connecting plate connecting the two cam transmission plates, a screw rod and a driving member. The driving member is arranged on the mounting plate and cooperates with the screw rod to drive the screw rod to pivot. The screw rod passes through the connecting plate and can be driven to drive the connecting plate to move in the longitudinal direction of the overhead crane.

5. The anti-tilt mechanism for a crown block according to claim 4, characterized in that: It also includes a sensing device, which includes a sensing sheet, a first sensing element and a second sensing element. A long avoidance hole is provided on the mounting plate along the longitudinal extension. The sensing sheet is arranged on the connecting plate and passes through the long avoidance hole. The first sensing element and the second sensing element are arranged on the mounting plate and are respectively located near the two side walls of the long avoidance hole in the longitudinal direction to sense the position of the sensing sheet.

6. The anti-tilt mechanism of a crown block according to claim 1, characterized in that: Both end surfaces of the clamping block in the transverse direction are configured as inclined surfaces for abutting against the retaining edge.

7. The anti-tilt mechanism for a crown block according to claim 6, characterized in that: Also included is a nylon block, which is disposed on the inclined surface.

8. The anti-tilt mechanism for a crown block according to claim 7, characterized in that: Also included is a gasket, which is disposed between the nylon block and the inclined surface.

9. The anti-tilt mechanism of a crown block according to claim 1, characterized in that: Two first guide rails are arranged on the mounting plate in opposite directions along the transverse direction. The first guide rails are extended along the longitudinal direction of the overhead travelling vehicle. The two cam transmission plates are slidably arranged on the two first guide rails respectively.

10. The anti-tilt mechanism of a crown block according to claim 1, characterized in that: The mounting plate is provided with two second guide rails spaced apart in the transverse direction, the second guide rails are extended in the transverse direction, and the two clamping blocks are respectively slidably provided on the two second guide rails.

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