Novel conveying belt tensioning mechanism suitable for ZB45B packaging unit

Abstract

The utility model discloses a novel conveying belt tensioning mechanism suitable for a ZB45B packaging unit, which is characterized by comprising a support arranged on an upper support or a lower support of an equipment main body, a fixed shaft extension piece and a bearing. The support comprises a transmission shaft mounting hole, a protruding part, a first fixing hole, a second fixing hole, a positioning block, a concave part and an avoiding arc. The transmission shaft fixing device can be installed on an upper support or a lower support and is used in cooperation with the fixing shaft extending piece to support the first transmission shaft and the third transmission shaft, and the problem that according to an original design, single-side fixing is prone to causing equipment failures is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of tobacco machinery processing, specifically to a novel conveyor belt tensioning mechanism suitable for ZB45B packaging machine units. Technical Background

[0002] In the original ZB45B packaging machine, the outer side of the first drive shaft of the cigarette pack outlet conveyor belt was suspended in the air. After the conveyor belt was tensioned, this resulted in the root of the drive shaft being subjected to force on one side. Figure 1 As shown, the design flaw in the conveyor belt at the cigarette pack outlet makes the first drive shaft and bearings prone to damage, especially on the ZB45B100mm fine-ply cigarette pack unit. Due to the varying cigarette pack sizes, the conveyor belt needs to apply greater pressure to the packs to ensure bonding quality. Simultaneously, the increased number of cigarette packs necessitates a tighter conveyor belt tension compared to standard cigarette pack production to achieve greater transmission force. This design defect is particularly pronounced, frequently resulting in drive shaft or bearing failures during trial use. This causes packs to jam or become misaligned during transport, leading to defective products. Each replacement requires equipment downtime, impacting production efficiency. Failure to promptly stop the machine when the drive shaft or bearing fails results in defective products and significant waste.

[0003] Currently, a search reveals that Chinese utility model patent CN212448243U discloses a fixing device for the outlet belt drive wheel of a fine-braced GDX2 packaging machine, comprising: an upper main drive fixing shaft (10), a lower main drive fixing shaft (20), an upper main drive wheel fixing device (30), an upper fixing support frame (31), a triangular support frame (32), a lower main drive wheel fixing device (40), a lower fixing support frame (41), and a bearing hole seat (42). Although it can achieve the fixing of the first drive shaft, the following technical drawbacks still exist:

[0004] One approach is to change the length of the first drive shaft to meet the length distance of the newly installed finger bracket, which requires replacing the first drive shaft and is a relatively complicated process.

[0005] On the other hand, the upper and lower main drive wheels are fixed by designing upper and lower main drive wheel fixing devices with different structures. However, the lower main drive wheel fixing device requires replacing part of the lower bracket structure, which is not conducive to the operation of the operator.

[0006] Another aspect is that the upper and lower fixed support frames have different structures, which increases the cost during the manufacturing of the fixing device. Summary of the Invention

[0007] In view of the many defects and shortcomings existing in the above-mentioned background technology, this utility model has made improvements and innovations, aiming to provide a new type of conveyor belt tensioning mechanism suitable for ZB45B packaging machine unit. By setting a bracket and installing it on the upper or lower bracket, the first drive shaft and the third drive shaft are fixed, which has better adaptability.

[0008] Another objective of this invention is to extend the fixed shaft by setting a fixed shaft extension member, which, in conjunction with the bracket, supports the first or third transmission shaft. During operation, it is not necessary to disassemble or replace the transmission shaft, making operation simpler, effectively shortening the equipment downtime for maintenance, and increasing the effective operating rate of the equipment.

[0009] Another objective of this invention is to enable operators to first attach the bracket to the main body of the equipment using magnets during installation, and then fix the bracket to the main body of the equipment using bolts after adjusting the distance and angle, thus facilitating the installation and disassembly operations of the operators.

[0010] To solve the above problems and achieve the above-mentioned invention objectives, this utility model provides a novel conveyor belt tensioning mechanism suitable for ZB45B packaging machine units, achieved through the following design mechanism and the following technical solution:

[0011] A novel conveyor belt tensioning mechanism suitable for ZB45B packaging machine unit includes: a bracket (1) installed on the upper bracket (42) or lower bracket (43) of the main body of the equipment (4), a fixed shaft extension (2) and a bearing (3);

[0012] The bracket (1) includes: a drive shaft mounting hole (11), a protrusion (12), a first fixing hole (13), a second fixing hole (14), a positioning block (15), a recess (16), and an avoidance arc (17);

[0013] The drive shaft mounting hole (11) is used in conjunction with the bearing (3) and the fixed shaft extension (2) to connect with the first drive shaft (41); the first fixed hole (13) is used in conjunction with the second drive shaft (44) and the bracket (1) is fixed on the upper bracket (42) by bolts;

[0014] or,

[0015] The bracket (1) can also be fixed to the lower bracket (43) by bolts. The drive shaft mounting hole (11) is used in conjunction with the bearing (3) and the fixed shaft extension (2) to connect with the third drive shaft (46).

[0016] One end of the fixed shaft extension (2) is connected to the first drive shaft (41) or the third drive shaft (46), and the other end is limited by the end head to the bearing (3) sleeved on it;

[0017] The first drive shaft (41) and the third drive shaft (46) have the same dimensions.

[0018] Preferably, the protrusion (12) is disposed at one end of the bracket (1), and the drive shaft mounting hole (11) is opened in the middle of the protrusion (12) to enhance the rigid support and support distance of the first drive shaft (41).

[0019] Preferably, the upper positioning block (15) is located at the far end of the drive shaft mounting hole (11) and is an "L-shaped" protrusion; the recess (16) starts from the positioning block and ends tangent to the first fixing hole (13), and is used in conjunction with the upper positioning block (15) to be snapped onto the lower bracket (43), and the bracket (1) is fixed onto the lower bracket (43) by bolts passing through the second fixing hole (14).

[0020] Preferably, the second fixing hole (14) is located on one side of the bracket (1), and the avoidance arc (17) is set on the other side of the bracket (1) to avoid the upper bracket bolt (45) when it is installed on the upper bracket (42).

[0021] Preferably, the second fixing hole (14) is a "waist-shaped" hole.

[0022] Preferably, the fixed shaft extension (2) is a "stepped" cylindrical structure, one end of which is a threaded column that works with the internal threaded groove of the first drive shaft (41), the other end is an end head, and the middle part is a cylindrical structure, wherein the end head is provided with a "hexagonal" structure that can be installed with tools, and the diameter of the middle part is the same as the diameter of the first drive shaft (41).

[0023] The diameter of the end of the fixed shaft extension (2) is greater than the diameter of the middle part, which is greater than the diameter of the threaded column.

[0024] Preferably, the bearing (3) is a self-aligning bearing, with the inner ring of the bearing (3) fitted onto the outer wall of the first transmission shaft (41) and the outer ring of the bearing (3) fitted into the mounting hole (11) of the transmission shaft.

[0025] Preferably, the bracket (1) further includes a magnet (18) installed in the groove of the bracket (1), which is used to be attracted to the upper bracket (42) or the lower bracket (43) during installation, and then the bracket (1) is fixed by bolts for easy operation.

[0026] The working principle is as follows: The above-mentioned design structure is a new type of conveyor belt tensioning mechanism suitable for ZB45B packaging machine. Before use, the operator uses two sets of this utility model mechanism as backup. After stopping the equipment, it is installed at the upper bracket (42): The operator uses tools to remove the bolts on the same side of the first drive shaft (41) and the second drive shaft (44) at the upper bracket (42). The other side of the first drive shaft (41) and the second drive shaft (44) are connected to the main body of the equipment (4). The bearing (3) is embedded into the drive shaft mounting hole (11). Inside the bearing (3), the fixed shaft extension (2) is passed through the inner ring of the bearing (3). After adjusting the position, one end of the second drive shaft (44) passes through the first fixing hole (13). The threaded end of the first drive shaft (41) is aligned with the threaded post of the fixed shaft extension (2). The bolts on the second drive shaft (44) and the fixed shaft extension (2) are tightened with tools so that the bracket (1) is fixed on the upper bracket (42). At this time, the avoidance arc (17) avoids the bolt (45) of the upper bracket. The bracket (1) provides support for the first drive shaft (41).

[0027] At the lower bracket (43): The operator first uses tools to remove the bolts on the lower bracket (43) and the third drive shaft (46), inserts the bearing (3) into the drive shaft mounting hole (11), and after the fixed shaft extension (2) passes through the inner ring of the bearing (3), the positioning block (15) is attached to the top of the lower bracket (43), and the recess (16) is snapped into the lower bracket (43). After adjusting the position, the operator uses tools to connect the fixed shaft extension (2) and the third drive shaft (41), and then uses bolts to pass through the second fixing hole (14) to fix the bracket (1) on the lower bracket (43). At this time, the bracket (1) provides support for the third drive shaft (41).

[0028] After installation, the operator turns on the equipment, and the first drive shaft (41) and the third drive shaft (43) are no longer subjected to force on one side, reducing the wear rate of parts.

[0029] In summary, the beneficial effects of this utility model compared with the prior art are as follows:

[0030] 1. This utility model achieves the use and adaptation of the same bracket in different positions by opening holes on the bracket that can be used with the upper bracket or the lower bracket, and can support the first drive shaft or the third drive shaft in all of them.

[0031] 2. This utility model, by setting a positioning block and a recessed part, allows the bracket to be snapped onto the lower bracket, achieving positioning and better support effect;

[0032] 3. This utility model makes the support of the first and third drive shafts more stable by setting the protrusion.

[0033] 4. By setting an avoidance arc, this utility model can achieve a better fit when installed on the upper bracket without being affected by the bolts of the upper bracket.

[0034] 5. This utility model uses magnets to allow the bracket to adhere to the upper and lower brackets, providing a fixing function and facilitating installation and disassembly by operators. Attached Figure Description

[0035] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a diagram showing the equipment's usage status before the improvement.

[0037] Figure 2 This is a schematic diagram of the usage state of this utility model;

[0038] Figure 3 This is the front view of this utility model;

[0039] Figure 4 This is one of the schematic diagrams of the overall structure of this utility model;

[0040] Figure 5 This is the second schematic diagram of the overall structure of this utility model;

[0041] Figure 6 This is the third schematic diagram of the overall structure of this utility model;

[0042] Figure 7 This is a schematic diagram showing the connection relationship between the bracket (1) and the first transmission shaft (41) of this utility model;

[0043] Figure 8 This is a schematic diagram showing the connection relationship between the bracket (1) and the third transmission shaft (46) of this utility model;

[0044] Figure 9 This is a schematic diagram of the installation position of the magnet (18) of this utility model;

[0045] In the figure, the numbers are: 1—bracket, 11—drive shaft mounting hole, 12—protrusion, 13—first fixing hole, 14—second fixing hole, 15—positioning block, 16—recess, 17—avoidance arc, 18—magnet.

[0046] 2—Fixed shaft extension;

[0047] 3—Bearings;

[0048] 4—Main body of equipment, 41—First drive shaft, 42—Upper support, 43—Lower support, 44—Second drive shaft, 45—Upper support bolt, 46—Third drive shaft. Detailed Implementation

[0049] To make the technical means, inventive features, and achieved objectives and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Example 1

[0051] like Figures 2 to 9 The present invention relates to a novel conveyor belt tensioning mechanism suitable for ZB45B packaging machine unit, comprising: a bracket 1, a fixed shaft extension 2, and a bearing 3, which are installed on the upper bracket 42 or the lower bracket 43 of the main body of the equipment 4;

[0052] The bracket 1 includes: a drive shaft mounting hole 11, a protrusion 12, a first fixing hole 13, a second fixing hole 14, a positioning block 15, a recess 16, and an avoidance arc 17.

[0053] The drive shaft mounting hole 11 is used in conjunction with the bearing 3 and the fixed shaft extension 2 to connect with the first drive shaft 41; the first fixing hole 13 is used in conjunction with the second drive shaft 44 and the bracket 1 is fixed to the upper bracket 42 by bolts.

[0054] or,

[0055] The bracket 1 can also be fixed to the fixed position of the lower bracket 43 by bolts. The transmission shaft mounting hole 11 is used in conjunction with the bearing 3 and the fixed shaft extension 2 to connect with the third transmission shaft 46.

[0056] One end of the fixed shaft extension 2 is connected to the first transmission shaft 41 or the third transmission shaft 46, and the other end is limited by the end head to the bearing 3 that is sleeved on it.

[0057] The first drive shaft 41 and the third drive shaft 46 are the same size.

[0058] The above-mentioned design mechanism, applicable to the ZB45B packaging machine unit, is a novel conveyor belt tensioning mechanism. During operation, the operator uses two sets of this mechanism as backup. After stopping the equipment, at position 42 on the upper support: [e.g., ...] Figure 2 As shown, the operator uses tools to remove the bolts on the same side of the first drive shaft 41 and the second drive shaft 44 at the upper bracket 42. The other side of the first drive shaft 41 and the second drive shaft 44 are connected to the main body 4 of the equipment. The bearing 3 is inserted into the drive shaft mounting hole 11. The fixed shaft extension 2 is passed through the inner ring of the bearing 3. After adjusting the position, one end of the second drive shaft 44 passes through the first fixing hole 13. The internal thread end of the first drive shaft 41 is aligned with the threaded post of the fixed shaft extension 2. Figure 7As shown, use tools to tighten the bolts on the second drive shaft 44 and the fixed shaft extension 2 to fix the bracket 1 on the upper bracket 42. At this time, the clearance arc 17 avoids the upper bracket bolt 45, and the bracket 1 provides support for the first drive shaft 41.

[0059] At lower bracket 43: The operator first uses tools to remove the bolts on lower bracket 43 and third drive shaft 46, inserts bearing 3 into drive shaft mounting hole 11, and after using fixed shaft extension 2 to pass through the inner ring of bearing 3, places positioning block 15 on top of lower bracket 43, with recess 16 engaging at lower bracket 43. After adjusting the position, the operator uses tools to connect fixed shaft extension 2 and third drive shaft 46, as follows. Figure 8 As shown, the bracket 1 is then fixed to the lower bracket 43 by bolts passing through the second fixing hole 14. At this time, the bracket 1 provides support for the third drive shaft 46.

[0060] After installation, the operator turns on the equipment, such as... Figure 3 As shown, the first drive shaft 41 and the third drive shaft 46 are no longer subjected to force on one side, reducing the wear rate of parts.

[0061] Example 2

[0062] Preferably, the protrusion 12 is disposed at one end of the bracket 1, and the drive shaft mounting hole 11 is opened in the middle of the protrusion 12 to enhance the rigid support and support distance of the first drive shaft 41.

[0063] In this utility model, such as Figure 5 As shown, the protrusion 12 is provided to better support the first drive shaft 41 and the third drive shaft 43, and to provide installation conditions for the fixed shaft extension 2.

[0064] Preferably, the upper positioning block 15 is located at the far end of the drive shaft mounting hole 11 and is an "L-shaped" protrusion; the recessed part 16 starts from the positioning block and ends at the first fixing hole 13, and works with the upper positioning block 15 to be snapped onto the lower bracket 43, and the bracket 1 is fixed onto the lower bracket 43 by bolts passing through the second fixing hole 14.

[0065] In this utility model, by providing a recessed portion 16, when the bracket 1 is installed on the lower bracket 43, the recessed portion 16 and the positioning block 15 can work together to limit the bracket 1.

[0066] Preferably, the second fixing hole 14 is located on one side of the bracket 1, and the avoidance arc 17 is provided on the other side of the bracket 1 to avoid the upper bracket bolt 45 when it is installed on the upper bracket 42.

[0067] In this utility model, by setting the avoidance arc 17, the upper bracket bolt 45 will not affect the installation of the bracket 1.

[0068] Preferably, the second fixing hole 14 is a "waist-shaped" hole.

[0069] In this utility model, such as Figure 4 As shown, the design of the second fixing hole as an "waist-shaped" hole makes it easier for the operator to align the third drive shaft 46 after installing the bracket 1 to the lower bracket 43. The waist-shaped hole design also makes it easier to align the bolt holes of the lower bracket 43, which is convenient for the operator to install.

[0070] Preferably, the fixed shaft extension 2 is a "stepped" cylindrical structure, one end of which is a threaded column that works in conjunction with the internal threaded grooves of the first drive shaft 41 and the third drive shaft 46, the other end is an end head, and the middle part is a cylindrical structure, wherein the end head is provided with a "hexagonal" structure that can be installed using tools, and the diameter of the middle part is the same as the diameter of the first drive shaft 41.

[0071] The diameter of the end of the fixed shaft extension 2 is greater than the diameter of the middle part, which is greater than the diameter of the threaded column.

[0072] In this utility model, because a bracket 1 is added to support the first drive shaft 41 or the third drive shaft 46, and the bracket 1 is fixed to the upper bracket 42 or the lower bracket 43, the first drive shaft 41 and the third drive shaft 46 are short in length and cannot meet the requirements of the bracket. Therefore, a fixed shaft extension 2 is designed, such as... Figure 7 As shown, a better support effect is achieved by extending the bearing 3. During the installation of bearing 3, the bearing 3 is installed offline on the fixed shaft extension 2 and then installed on the first drive shaft 41, which facilitates the operation of the operator.

[0073] Preferably, the bearing 3 is a self-aligning bearing, with the inner ring of the bearing 3 sleeved on the outer wall of the first transmission shaft 41 and the outer ring of the bearing 3 passing through the mounting hole 11 of the transmission shaft.

[0074] In this invention, bearing 3 is designed as a self-aligning bearing, which reduces the existence of errors between the first drive shaft 41 and the third drive shaft 46 after long-term use through the adjustment of the self-aligning bearing.

[0075] Furthermore, the bracket 1 also includes a magnet 18 installed in the groove of the bracket 1, which is used to be attracted to the upper bracket 42 or the lower bracket 43 during installation, and then the bracket 1 is fixed by bolts, which facilitates operation.

[0076] In this utility model, such as Figure 9 As shown, with the magnet 18 set in the groove of the bracket 1, the operator can first attach the bracket 1 to the upper bracket 42 or the lower bracket 43 when installing, without having to fix it by hand. Especially when aligning the installation position on one side to align the other side, the design of embedding the magnet 18 makes the operator's installation and disassembly work more convenient.

[0077] In summary, a more specific embodiment of this utility model is as follows:

[0078] like Figure 7 As shown, a new type of conveyor belt tensioning mechanism suitable for ZB45B packaging machine unit includes: bracket 1, fixed shaft extension 2 and bearing 3.

[0079] During use, the operator uses two sets of this utility model mechanism as backup. After stopping the equipment, when installing at the upper bracket 42: the operator uses tools to remove the bolts on the same side of the first drive shaft 41 and the second drive shaft 44 at the upper bracket 42. The other side of the first drive shaft 41 and the second drive shaft 44 are connected to the equipment body 4. Using one set of this utility model, the bearing 3 is embedded into the drive shaft mounting hole 11. The fixed shaft extension 2 is used to pass through the inner ring of the bearing 3. After adjusting the position, one end of the second drive shaft 44 passes through the first fixed hole 13, and the internal thread end of the first drive shaft 41 is aligned with the threaded post of the fixed shaft extension 2. Figure 7 As shown, use tools to tighten the bolts on the second drive shaft 44 and the fixed shaft extension 2, so that the bracket 1 is fixed on the upper bracket 42 and the fixed shaft extension 2 is fixed on the first drive shaft 41. At this time, the clearance arc 17 avoids the upper bracket bolt 45, and the bracket 1 provides support for the first drive shaft 41.

[0080] During installation at the lower bracket 43: The operator first uses tools to remove the bolts on the lower bracket 43 and the third drive shaft 46. Using another set of this utility model, the bearing 3 is embedded into the drive shaft mounting hole 11. After the fixed shaft extension 2 passes through the inner ring of the bearing 3, the positioning block 15 is overlapped on the top of the lower bracket 43, and the recessed part 16 is engaged at the lower bracket 43. After adjusting the position, the operator uses tools to connect the fixed shaft extension 2 and the third drive shaft 46. Figure 8 As shown, the bracket 1 is then fixed to the lower bracket 43 by bolts passing through the second fixing hole 14. At this time, the bracket 1 provides support for the third drive shaft 46.

[0081] After installation, the operator turns on the equipment, and the first drive shaft 41 and the third drive shaft 46 are no longer subjected to force on one side, such as... Figure 2 As shown, after the conveyor belt is tensioned, the first drive shaft 41 and the third drive shaft 46 are supported on both sides, reducing the wear rate of the parts.

[0082] In this utility model, the connection is either a fixed connection or a detachable connection. The fixed connection is either a welded connection or a directly machined integral structure, while the detachable connection is either an internal or external threaded connection, a snap-fit ​​connection, or a plug-in structure connection.

[0083] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A novel conveyor belt tensioning mechanism suitable for ZB45B packaging machine units, characterized in that, include: The bracket (1), fixed shaft extension (2), and bearing (3) are installed on the upper bracket (42) or lower bracket (43) of the main body of the equipment (4); The bracket (1) includes: a drive shaft mounting hole (11), a protrusion (12), a first fixing hole (13), a second fixing hole (14), a positioning block (15), a recess (16), and an avoidance arc (17); The drive shaft mounting hole (11) is used in conjunction with the bearing (3) and the fixed shaft extension (2) to connect with the first drive shaft (41); the first fixed hole (13) is used in conjunction with the second drive shaft (44) and the bracket (1) is fixed on the upper bracket (42) by bolts; or, The bracket (1) can also be fixed to the lower bracket (43) by bolts. The drive shaft mounting hole (11) is used in conjunction with the bearing (3) and the fixed shaft extension (2) to connect with the third drive shaft (46). One end of the fixed shaft extension (2) is connected to the first drive shaft (41) or the third drive shaft (46), and the other end is limited by the end head to the bearing (3) sleeved on it; The first drive shaft (41) and the third drive shaft (46) have the same dimensions.

2. The novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 1, characterized in that, The protrusion (12) is located at one end of the bracket (1), and the drive shaft mounting hole (11) is located in the middle of the protrusion (12) to enhance the rigid support and support distance of the first drive shaft (41).

3. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 1, characterized in that, The upper positioning block (15) is located at the far end of the drive shaft mounting hole (11) and is an "L-shaped" protrusion; the recess (16) starts from the positioning block and ends tangent to the first fixing hole (13), and works with the upper positioning block (15) to be snapped onto the lower bracket (43), and the bracket (1) is fixed onto the lower bracket (43) by bolts passing through the second fixing hole (14).

4. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 3, characterized in that, The second fixing hole (14) is located on one side of the bracket (1), and the avoidance arc (17) is set on the other side of the bracket (1) to avoid the upper bracket bolt (45) when it is installed on the upper bracket (42).

5. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 4, characterized in that, The second fixing hole (14) is a "waist-shaped" hole.

6. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 1, characterized in that, The fixed shaft extension (2) is a "stepped" cylindrical structure. One end is a threaded column that works with the internal threaded groove of the first drive shaft (41). The other end is an end head. The middle part is a cylindrical structure. The end head is provided with a "hexagonal" structure that can be installed with tools. The diameter of the middle part is the same as the diameter of the first drive shaft (41). The diameter of the end of the fixed shaft extension (2) is greater than the diameter of the middle part, which is greater than the diameter of the threaded column.

7. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 1, characterized in that, The bearing (3) is a self-aligning bearing. The inner ring of the bearing (3) is fitted on the outer wall of the first transmission shaft (41), and the outer ring of the bearing (3) is fitted in the mounting hole (11) of the transmission shaft.

8. A novel conveyor belt tensioning mechanism for ZB45B packaging units according to claim 1, characterized in that, The bracket (1) further includes a magnet (18) installed in the groove of the bracket (1), which is used to be attracted to the upper bracket (42) or the lower bracket (43) during installation, and then the bracket (1) is fixed by bolts for easy operation.

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