Anti-loose brake disc of crown block crane

Abstract

In order to solve the problem that a connecting bolt is easy to loosen due to long-time use of a brake disc in the prior art, the utility model provides the anti-loosening brake disc of the crown block crane, which comprises a fixed bracket, a winding wheel rotationally connected to the fixed bracket, and a brake disc, and the axial side of the winding wheel is coaxially and fixedly connected with a brake shaft; the brake disc is coaxially connected to the brake shaft in a sliding mode, a positioning groove is formed in the brake shaft, a positioning block matched with the positioning groove in a sliding mode is arranged on the brake disc, a locking device is arranged between the brake disc and the brake shaft and comprises a limiting disc and a positioning ring, and an axial fixing assembly is arranged on the positioning ring to be matched and fixed with the brake disc. The axial fixing assembly comprises a connecting block, a connecting rod connected to the connecting block in a sliding mode and a spring connected between the connecting rod and the connecting block, the brake disc can be prevented from rotating in the circumferential direction through the positioning groove and the positioning block, the axial position of the brake disc is fixed by matching the axial fixing assembly with the limiting disc, the fixing mode is reliable, and operation is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of overhead crane brake disc technology, and in particular to an anti-loosening brake disc for overhead cranes. Background Technology

[0002] Overhead cranes are cranes that operate at heights, including single-girder cranes and double-girder cranes. They are widely used in factories, warehouses, material yards, and other places to lift and transport goods. They are prohibited from use in flammable, explosive, or corrosive environments. Brake discs are the friction pairs of disc brakes. In addition to having the strength and rigidity required as components, they should also have the highest possible and most stable coefficient of friction, as well as appropriate wear resistance, heat resistance, heat dissipation, and heat capacity. When using overhead cranes, brake discs are generally required to brake the crane.

[0003] In daily operation, during the installation of the brake disc, the existing brake disc is generally fixed to the surface of the brake shaft with bolts. After long-term use, the equipment is prone to vibration, which can cause the brake disc fixing bolts to loosen. In severe cases, it can cause the overhead crane brake disc fixing bolts to break and be damaged. If this is not detected in time, it can cause the overhead crane to slip and become a dangerous hazard. Utility Model Content

[0004] To address the problem of loosening of connecting bolts in existing brake discs due to prolonged use, this invention provides an anti-loosening brake disc for overhead cranes, employing the following technical solution:

[0005] A crane anti-loosening brake disc includes a fixed bracket, a winding wheel rotatably connected to the fixed bracket, and a brake disc. The winding wheel is coaxially fixedly connected to a brake shaft on one axial side. The brake disc is coaxially slidably connected to the brake shaft, and a locking device is provided between the brake disc and the brake shaft. The locking device includes a limiting disc and a positioning ring. The limiting disc is coaxially fixedly connected to the brake shaft and located axially inside the brake disc. The positioning ring is coaxially slidably connected to the brake shaft and located axially outside the brake disc. A positioning groove with a length distributed parallel to the axis is formed on the surface of the brake shaft. A positioning block is provided inside the brake disc and slidably connected to the positioning groove. A connecting hole with a length distributed radially along the brake shaft is formed in the positioning groove. A connecting block is fixedly connected to the positioning ring. A sliding hole is formed inside the connecting block. A connecting rod is slidably connected radially along the brake shaft in the sliding hole. One end of the connecting rod engages with the connecting hole, and a spring is fixedly connected between the other end and the inner wall of the sliding hole. The length of the spring is distributed radially along the brake shaft.

[0006] Furthermore, a pull hole is provided on the outer wall of the connecting block, the pull hole is connected to the sliding hole, and a pull block is fixedly connected to one end of the connecting rod located in the sliding hole. The pull block is slidably connected along the pull hole and is used to drive the connecting rod to slide into the connecting hole and slide out of the connecting hole.

[0007] Furthermore, the pull hole consists of a first elongated hole, a third elongated hole, and a second elongated hole that are continuously distributed. The lengths of the first elongated hole and the second elongated hole are both radially distributed along the brake shaft, and the length of the first elongated hole is greater than that of the second elongated hole.

[0008] Furthermore, the surface of the brake disc is provided with a protective device, which includes a first protective disc and a second protective disc located on both sides of the brake disc along its axial direction.

[0009] Furthermore, the surface of the brake disc is provided with positioning holes, and the first protective disc and the second protective disc are respectively fixedly connected with a first positioning rod and a second positioning rod for engaging with the positioning holes.

[0010] Furthermore, the brake disc surface is provided with a limiting hole, and a limiting rod is provided in the limiting hole. The second protective disc and the first protective disc are provided with through holes and threaded holes distributed corresponding to the positions of the limiting holes. One end of the limiting rod passes through the through hole and the limiting hole and is threadedly connected to the threaded hole, and the other end is located on the axial inner side of the second protective disc and is threadedly connected to a fastening nut.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. The axial side of the overhead crane winding reel is equipped with a brake shaft that slides in cooperation with the brake disc. The two slide in cooperation with a positioning groove and a positioning block to avoid relative rotation between the brake disc, the brake shaft, and the winding reel in the circumferential direction. The brake disc and the brake shaft are fixed in the axial position by a limit plate and a positioning ring. The positioning ring is equipped with a connecting rod that slides in cooperation with the connecting hole on the positioning groove. Thus, the axial position of the brake disc is fixed by the positioning ring, achieving double locking of the brake disc. Compared with the radial fixing method using bolts in the prior art, the fixing effect is better.

[0013] 2. The axial fixing assembly, consisting of a connecting rod, connecting hole, spring, pull block, and pull hole, can quickly lock and unlock the brake disc and brake shaft, making operation convenient.

[0014] 3. By installing protective devices, the surface of the brake disc can be protected, avoiding deep wear on the surface of the brake disc caused by prolonged braking, thus reducing the frequency of brake disc replacement. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the connection structure between the brake disc and the brake shaft in this utility model.

[0017] Figure 3 for Figure 2 A magnified view of part A in the diagram

[0018] Figure 4 for Figure 2 Schematic diagram of the structure at point B

[0019] Figure 5 Schematic diagram of the distribution of pull holes on the connecting block

[0020] Legend: 1. Fixed bracket; 2. Rewinding wheel; 3. Brake shaft; 4. Brake disc; 5. Locking device; 51. Limiting disc; 52. Positioning ring; 53. Positioning groove; 54. Positioning block; 55. Connecting hole; 56. Connecting block; 57. Connecting rod; 58. Pull block; 59. Pulling hole; 591. First elongated hole; 592. Second elongated hole; 593. Third elongated hole; 510. Sliding hole; 511. Spring; 6. Protective device; 61. First protective disc; 62. Second protective disc; 63. Limiting hole; 64. Positioning hole; 65. First positioning rod; 66. Second positioning rod; 67. Limiting rod; 68. Fastening nut; 69. Threaded hole. Detailed Implementation

[0021] For ease of description, in this embodiment, Figure 1 The reference direction for the view is taken as the left-right direction, with the axis of brake shaft 3 as the left-right direction, and the width direction of fixed bracket 1 as the right-right direction. Figure 1 The front-back direction is the front-back direction, and the height direction of the fixed bracket 1 is the up-down direction.

[0022] Please see Figures 1-5 This utility model provides an anti-loosening brake disc for an overhead crane, including a fixed bracket 1, a winding wheel 2, a brake shaft 3, a brake disc 4, and a locking device 5. The winding wheel 2 is rotatably connected inside the fixed bracket 1. One axial end of the winding wheel 2 is coaxially fixedly connected to the brake shaft 3, and the other end is connected to a drive device such as a drive motor. The brake shaft 3 is located outside the fixed bracket 1 and is rotatably connected to the fixed bracket 1. The brake disc 4 is coaxially slidably connected to the brake shaft 3. The locking device 5 is connected between the brake shaft 3 and the brake disc 4 to fix the relative position between the two, so as to connect with the brake disc 4 through the brake, thereby braking the winding wheel 2.

[0023] Specifically, multiple sets of positioning grooves 53 are evenly arranged on the surface of the brake shaft 3 along the circumferential direction. Each set of positioning grooves 53 is distributed along the axial direction of the brake shaft 3. A positioning block 54 is fixedly connected to the inner wall of the center hole of the brake disc 4. The positioning block 54 and the positioning groove 54 are slidably connected. The brake disc 4 can slide through the positioning groove 503 and the positioning block 54 to adjust the relative position of the brake disc 4 in the axial direction of the brake shaft 3, and at the same time restrict the circumferential rotation of the brake disc 4.

[0024] The locking device 5 includes a limiting disc 51 and a positioning ring 52. Along the axial direction of the brake shaft 3, the limiting disc 51 and the positioning ring 52 are located on the left and right sides of the brake disc 4, respectively. The limiting disc 51 is coaxially fixedly connected to the brake shaft 3 and located on the left side of the brake disc 4, i.e., the axial inner side. The positioning ring 52 is coaxially slidably connected to the brake shaft 3 and located on the right side of the brake disc 4, i.e., the axial outer side. Furthermore, multiple sets of axial fixing components are fixedly connected to the outer wall of the positioning ring 52. Multiple sets of connecting holes 55 are provided in the positioning groove 53. The multiple sets of axial fixing components and the multiple sets of connecting holes 55 are distributed and cooperate one-to-one. Specifically, the axial fixing... The assembly includes a connecting block 56, a connecting rod 57, and a spring 511. The connecting block 56 is fixedly connected to the outer wall of the positioning ring 52, and the connecting block 56 has a sliding hole 510 with a length distributed radially along the brake shaft 3. The connecting rod 57 has a length distributed radially along the brake shaft 3, and one end of the connecting rod 57 is slidably connected to the inside of the sliding hole 510, while the other end is distributed towards the brake shaft 3 and passes through the connecting block 56 before engaging with the connecting hole 55. The spring 511 has a length distributed radially along the brake shaft 3, and both ends of the spring 511 are fixedly connected to the radially outer end of the connecting rod 57 and the inner wall of the sliding hole 510, respectively.

[0025] In addition, the connecting block 56 is provided with continuously distributed pull holes 59. Specifically, the pull holes 59 are composed of a first elongated hole 591, a second elongated hole 592, and a third elongated hole 593 that are continuously distributed and connected to the internal through hole of the connecting block 56. The first elongated hole 591 and the second elongated hole 592 are located on the adjacent side walls of the connecting block 56, respectively. The lengths of both are radially distributed along the brake shaft 3, and the length of the first elongated hole 591 is greater than that of the second elongated hole 592. The ends of the first elongated hole 591 and the second elongated hole 592 that are close to the brake shaft 3 are flush and connected through the third elongated hole 593. The connecting rod 57 is fixedly connected to a pull block 58 at one end radially on the outer side of the brake shaft 3. The pull block 58 can slide along the length direction of the pull hole 59 and extend to a certain length outside the connecting block 56. It should be noted that when the pull block 58 slides along the distribution direction of the pull hole 59, the pull block 58 can drive the connecting rod 57 to rotate in the through hole and the connecting hole 55 of the connecting block 56.

[0026] In the initial state without the positioning ring 52 installed, the pull block 58 is located inside the first elongated hole 591, and the spring 511 is in a naturally extended state. When the positioning ring 52 is installed on the brake shaft 3, the positioning ring 52 moves axially along the brake shaft 53 until the connecting rod 57 corresponds to the position of the connecting hole 55. At this time, the operator pulls the pull block 58 to slide downwards along the first elongated hole 591. When it slides to the lower end of the first elongated hole 591, the pull block 59 drives the connecting rod 57 to rotate 90° clockwise, causing the pull block 58 to slide through the third elongated hole 593 into the second elongated hole 592. Figure 4 As shown, when the pull block 58 is located in the second elongated hole 592, the spring 511 is in a stretched state. At this time, one end of the connecting rod 57 extends into the connecting hole 55, and the two engage to fix the positioning ring 52 and the brake shaft 3, thereby fixing and limiting the axial movement of the brake disc 4. When the positioning ring 52 contacts and limits the axial movement of the brake disc 4, the pull block 58 can be moved to the inside of the first elongated hole 591. At this time, the connecting rod 57 slides out to the outside of the connecting hole 55 under the reset action of the spring 511.

[0027] In addition, a protective device 6 is provided on the surface of the brake disc 4. The protective device 6 includes a first protective disc 61 and a second protective disc 62 located on the right and left sides of the brake disc 4, respectively. The brake disc 4 has a positioning hole 64 that extends through the body of the brake disc 4. A first positioning rod 65 is fixedly connected to the left side of the first protective disc 61, and a second positioning rod 66 is fixedly connected to the right side of the second protective disc 62. Both the first positioning rod 65 and the second positioning rod 66 are engaged with the positioning hole 64. By providing the first protective disc 61 and the second protective disc 62, the surface of the brake disc 4 can be protected, reducing frictional damage to the surface of the brake disc 4 and improving the service life of the components.

[0028] A limiting hole 63 is also provided on the brake disc 4, and a limiting rod 67 is provided in the limiting hole 63. The limiting hole 63 is distributed through the brake disc 4 body on the left and right. The second protective disc 62 and the first protective disc 61 are respectively provided with through holes and threaded holes 69 corresponding to the positions of the limiting hole 63. The limiting rod 67 has external threads at both ends along its length. The limiting rod 67 passes through the through hole and the limiting hole 63 on the second protective disc 62 from left to right and is then threadedly connected to the threaded hole 69. A fastening nut 68 is threadedly connected to the left end. After the limiting rod 67 passes through the limiting hole 63 and is fixed to the first protective disc 61, the second protective disc 62 is tightened to the brake disc 4 by the fastening nut 68, thereby fixing the protective device 6.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A kind of overhead hoist anti-looseness brake disc, including fixed support (1), winding wheel (2) rotationally connected to fixed support (1), brake disc (4), it is characterized in that, The winding wheel (2) is coaxially fixedly connected with a brake shaft (3) on one side in the axial direction, the brake disc (4) is coaxially slidably connected with the brake shaft (3), and a locking device (5) is arranged between the brake disc (4) and the brake shaft (3), the locking device (5) comprises a limiting disc (51) and a positioning ring (52), the limiting disc (51) is coaxially fixedly connected with the brake shaft (3) and located on the inner side of the brake disc (4) in the axial direction, the positioning ring (52) is coaxially slidably connected with the brake shaft (3) and located on the outer side of the brake disc (4) in the axial direction, a positioning groove (53) with a length distributed along the direction parallel to the axis is formed on the surface of the brake shaft (3), a positioning block (54) slidably connected with the positioning groove (53) is arranged in the brake disc (4), and a connecting hole (55) with a length distributed along the radial direction of the brake shaft (3) is formed in the positioning groove (53), a connecting block (56) is fixedly connected to the positioning ring (52), a sliding hole (510) is formed in the connecting block (56), a connecting rod (57) is slidably connected in the sliding hole (510) along the radial direction of the brake shaft (3), one end of the connecting rod (57) is matched with the connecting hole (55) for clamping, and the other end is fixedly connected with the inner wall of the sliding hole (510) through a spring (511), and the length direction of the spring (511) is distributed along the radial direction of the brake shaft (3).

2. The slack preventing brake disc for a crown block according to claim 1, characterized in that: A pull hole (59) is arranged on the outer wall of the connecting block (56), the pull hole (59) is connected with the sliding hole (510), one end of the connecting rod (57) fixedly connected in the sliding hole (510) is fixedly connected with a pull block (58), the pull block (58) is slidably connected along the pull hole (59), and is used to drive the connecting rod (57) to slide into and out of the connecting hole (55).

3. The slack preventing brake disc for a crown block according to claim 2, wherein: The pull hole (59) is formed by a first long slot hole (591), a second long slot hole (592) and a third long slot hole (593), the first long slot hole (591) and the second long slot hole (592) are both distributed along the radial direction of the brake shaft (3), and the length of the first long slot hole (591) is greater than that of the second long slot hole (592).

4. The slack preventing brake disc for a crown block as set forth in claim 1, wherein: A protection device (6) is arranged on the surface of the brake disc (4), the protection device (6) comprises a first protection disc (61) and a second protection disc (62) arranged on the two sides of the brake disc (4) in the axial direction respectively.

5. The slack preventing brake disc for a crown block according to claim 4, wherein: A positioning hole (64) is formed on the surface of the brake disc (4), and a first positioning rod (65) and a second positioning rod (66) used for clamping with the positioning hole (64) are fixedly connected to the first protection disc (61) and the second protection disc (62) respectively.

6. The slack preventing brake disc for a crown block according to claim 4, wherein: A limiting hole (63) is formed on the surface of the brake disc (4), a limiting rod (67) is arranged in the limiting hole (63), and through holes and threaded holes (69) corresponding to the position of the limiting hole (63) are arranged on the second protection disc (62) and the first protection disc (61), one end of the limiting rod (67) passes through the through hole and the limiting hole (63) and is screwed with the threaded hole (69), and the other end is located on the inner side of the second protection disc (62) in the axial direction and is screwed with a fastening nut (68).

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