Driving host displacement protection device

Abstract

The utility model discloses a driving host displacement protection device, which comprises a mounting plate, a driving host body, a limiting mechanism, a triggering mechanism and a transmission mechanism, long holes are symmetrically formed in four corner areas of the mounting plate, and the driving host body is fixed on the surface of the mounting plate through high-strength bolts penetrating through the long holes. The high-strength bolt is in clearance fit with the long hole to form a longitudinal adjusting structure; the limiting mechanism comprises limiting blocking strips symmetrically arranged on the left side and the right side of the bottom of the driving main machine body, the inner side walls of the limiting blocking strips are tightly attached to the side walls of the driving main machine body, and the stability of a high-hardness transmission chain wheel is enhanced through transverse constraint of the limiting blocking strips, longitudinal adjustment of long-hole bolts and accurate detection of an independent triggering mechanism. The problem of function failure caused by unreliable one-way detection and installation structure contradiction in the background technology is comprehensively solved, all-directional protection of displacement of the driving host is achieved, and the safety and the service life of equipment are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety protection technology, specifically a drive host displacement protection device. Background Technology

[0002] The drive unit (such as elevator traction machine, industrial transmission equipment, power source of large machinery, etc.) is the core component of equipment operation. Its installation stability directly affects the safety and service life of the equipment. During long-term operation, due to factors such as vibration, impact, load changes or deformation of the installation foundation, the drive unit may be displaced or offset, leading to transmission system failure, increased noise, or even serious safety accidents.

[0003] Publication number CN210710302U discloses a drive unit displacement protection device. Through the combined action of the drive unit mounting base plate, drive unit, fixing bolts, reset switch, travel bracket, and switch mounting bracket, the travel bracket is installed at the fixing bolt of the drive unit. When the drive unit shifts, the travel bracket will synchronously shift, triggering the manual reset switch. The action signal is fed back to the escalator or moving walkway control system, which issues a stop command, immediately stopping the escalator or moving walkway. This avoids safety hazards such as insufficient chain tension and escalator reversal caused by drive unit displacement, more effectively ensuring passenger safety. However, this patent still has the following problems in practical use:

[0004] The solution uses a wave-shaped travel bracket design, which can effectively monitor the displacement of the drive unit in the front-to-back direction, but has the following key defects: it cannot effectively monitor the displacement in the left-to-right direction, resulting in blind spots in the protection function; the travel bracket relies on the fixing bolts of the drive unit for installation, and the occurrence of displacement of the unit inevitably means that the bolts have loosened, which leads to the failure of the bracket reference and positioning offset, making it unable to accurately trigger the manual reset switch, and ultimately causing the protection function to fail.

[0005] Therefore, a drive host displacement protection device is proposed to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a drive host displacement protection device to solve the problems mentioned in the background art, which currently cannot effectively monitor displacement in the left and right directions, resulting in blind spots in the protection function; the travel bracket is installed by the fixing bolts of the drive host, and the occurrence of host displacement inevitably means that the bolts have loosened, which leads to the failure of the bracket reference and positioning offset, making it unable to accurately trigger the manual reset switch, and ultimately causing the protection function to fail.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drive host displacement protection device, comprising: a mounting plate, a drive host body, a limiting mechanism, a triggering mechanism, and a transmission mechanism.

[0008] The mounting plate has symmetrically arranged elongated holes at its four corners. The drive host body is fixed to the surface of the mounting plate by high-strength bolts that pass through the elongated holes. The high-strength bolts and the elongated holes are fitted together to form a longitudinal adjustment structure.

[0009] The limiting mechanism includes limiting bars symmetrically arranged on the left and right sides of the bottom of the drive host body. The inner sidewall of the limiting bar is tightly fitted with the sidewall of the drive host body. The limiting bar and the mounting plate are fixedly connected by bolts to form a lateral displacement limiting structure.

[0010] The triggering mechanism includes an irregularly shaped switch striking plate and a limit switch. The irregularly shaped switch striking plate is fixed to one side of the bottom of the drive host body by bolts, and its extended end is provided with an arc-shaped groove that matches the limit switch roller. The limit switch is mounted on the tightening bolt by a switch bracket.

[0011] The transmission mechanism includes a transmission sprocket fixed to the output end of the drive host body via a key connection, and a drive chain meshing with the transmission sprocket.

[0012] Preferably, the length direction of the elongated hole is consistent with the longitudinal adjustment direction of the drive host body, and the gap between the high-strength bolt and the elongated hole is 0.2-0.5mm, so as to realize the position adjustment of the drive host body along the length direction of the elongated hole.

[0013] Preferably, the radius of the arc-shaped groove is 0.5-1.5 mm larger than the radius of the limit switch roller, and the arc center angle is 90° to 120°.

[0014] Preferably, the switch bracket includes a first arm and a second arm that are perpendicular to each other. The first arm is fixedly connected to the limit switch by bolts, and the second arm is fixedly connected to a tightening bolt by threads. The tightening bolt is horizontally installed on the surface of the mounting plate by fasteners.

[0015] Preferably, the first arm of the switch bracket is provided with an elongated hole for adjusting the installation position of the limit switch.

[0016] Preferably, the axis of the tightening bolt is perpendicular to the side of the drive host body, one end of the tightening bolt is in close contact with the side of the drive host body through a spherical washer, and the other end of the tightening bolt is provided with a nut for adjusting the tightening force.

[0017] Preferably, the teeth of the transmission sprocket are carburized and quenched to achieve a surface hardness of HRC55-60.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This drive host displacement protection device, through the lateral constraint of the limit stop bar, the longitudinal adjustment of the long hole bolt, the precise detection of the independent trigger mechanism, and the enhanced stability of the high-hardness transmission sprocket, comprehensively solves the problems of unreliable unidirectional detection and functional failure caused by contradictory installation structures in the prior art, realizing all-round protection of drive host displacement, and significantly improving the safety and service life of the equipment. The specific details are as follows:

[0019] 1. Multi-directional displacement restriction, eliminating detection blind spots.

[0020] By tightly fitting the limit stop bar to the side wall of the drive host body, a rigid constraint is formed, which effectively prevents the drive host body from shifting in the left and right directions, solving the problem that the wavy bracket in the background technology cannot detect lateral displacement; the use of long holes and high-strength bolts with clearance fit allows the drive host to be finely adjusted longitudinally during installation, while providing stable longitudinal constraint after the high-strength bolts are tightened, avoiding displacement accumulation caused by vibration or load changes.

[0021] 2. Independent triggering mechanism to prevent installation reference failure.

[0022] The non-circular switch striking plate and limit switch are designed separately: the triggering mechanism does not rely on the tightening state of the fixing bolts. Even if the drive host moves slightly (the limit switch can be triggered by the drive host body tilting forward or backward), the precise fit between the arc-shaped groove and the limit switch roller can still ensure reliable triggering, solving the problem of protection function failure caused by loose bolts in the background technology; the limit switch position can be finely adjusted through the elongated hole and the tightening bolt, ensuring accurate detection of displacement and triggering of protection action under different working conditions;

[0023] 3. Enhance transmission stability and reduce displacement-inducing factors.

[0024] High-hardness transmission sprockets: Carburized and quenched (HRC55-60), significantly improving wear resistance and reducing transmission imbalance caused by sprocket wear, thereby reducing the risk of abnormal vibration of the drive unit. At the same time, the mounting plate has a longitudinal long hole structure, which facilitates the axial position adjustment of the drive unit, thereby realizing the adjustment of the drive chain tension. The tightening force is adjusted by spherical washers and nuts, so that the drive unit body always maintains stable contact with the mounting plate, further suppressing displacement.

[0025] 4. Modular structure, facilitating installation and maintenance.

[0026] Standardized design of the mounting plate: The symmetrical layout of the elongated holes and limit bars simplifies the installation process and provides an intuitive reference for subsequent maintenance; the trigger mechanism and the transmission mechanism are separated: avoiding mutual interference and improving system reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the drive chain transmission structure of this utility model;

[0028] Figure 2 This is a front view structural diagram of the drive host body of this utility model;

[0029] Figure 3 This is a top view of the drive unit body of this utility model.

[0030] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0031] In the diagram: 1. Mounting plate; 2. Long hole; 3. Drive unit body; 4. High-strength bolt; 5. Limit stop bar; 6. Irregularly shaped switch striking plate; 7. Arc-shaped groove; 8. Limit switch; 9. Switch bracket; 10. Tightening bolt; 11. Drive chain. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1-4 This utility model provides a technical solution: a drive host displacement protection device, including: a mounting plate 1, a drive host body 3, a limiting mechanism, a triggering mechanism and a transmission mechanism. The four corner areas of the mounting plate 1 are symmetrically provided with elongated holes 2. The drive host body 3 is fixed to the surface of the mounting plate 1 by high-strength bolts 4 that pass through the elongated holes 2. The high-strength bolts 4 and the elongated holes 2 are fitted with a clearance to form a longitudinal adjustment structure.

[0034] During installation or maintenance, the position of the drive unit 3 can be flexibly adjusted longitudinally (in the chain tension direction) by means of the elongated holes 2, ensuring that the meshing accuracy and tension of the transmission sprocket and the drive chain 11 are at their best. After adjustment, the position of the main unit can be fixed simply by tightening the high-strength bolts 4, which is easy to operate and does not require additional positioning fixtures. The symmetrically arranged elongated holes 2 can adapt to the installation requirements of different models of drive unit 3, which is highly versatile and reduces the cost of customized processing. The direction of the elongated holes is consistent with the chain tension direction, ensuring that the adjustment process meets the mechanical requirements of the transmission system.

[0035] The limiting mechanism includes limiting bars 5 symmetrically arranged on the left and right sides of the bottom of the drive host body 3. The inner sidewall of the limiting bar 5 is tightly fitted with the sidewall of the drive host body 3. The limiting bar 5 and the mounting plate 1 are fixedly connected by bolts to form a lateral displacement limiting structure.

[0036] The standardized bolt connection simplifies the installation process and facilitates disassembly and replacement during subsequent inspection and maintenance; the limit stop 5 is tightly attached to the side wall of the drive host body 3 to form a rigid constraint, effectively preventing the drive host body 3 from shifting in the left and right directions.

[0037] The triggering mechanism includes a non-circular switch striking plate 6 and a limit switch 8. The non-circular switch striking plate 6 is fixed to one side of the bottom of the drive host body 3 by bolts. Its extended end is provided with an arc-shaped groove 7 that is adapted to the roller of the limit switch 8. The limit switch 8 is mounted on the tightening bolt 10 by a switch bracket 9.

[0038] The extended end of the irregularly shaped switch striking plate 6 is designed as an arc-shaped groove 7, which precisely matches the shape of the roller of the limit switch 8. This adaptive structure ensures that the roller can be stably embedded in the groove during operation, avoiding slippage and deviation, thereby improving the accuracy and repeatability of triggering and reducing the risk of false operation. The irregularly shaped switch striking plate 6 is fixed to the drive host body 3 by bolts, which is convenient for disassembly and assembly, and easy for maintenance or replacement. The limit switch 8 is mounted on the tightening bolt 10 by the switch bracket 9. The position of the limit switch (such as in the horizontal direction) can be finely adjusted by utilizing the thread characteristics of the tightening bolt, which can flexibly adapt to the triggering distance requirements under different working conditions and optimize the response sensitivity.

[0039] The transmission mechanism includes a transmission sprocket fixed to the output end of the drive host body 3 via a key connection, and a drive chain 11 meshing with the transmission sprocket;

[0040] The transmission sprocket is fixed to the output end of the drive host body 3 by a key connection to ensure a tight fit with the drive shaft, avoid relative slippage, and improve torque transmission efficiency; the drive chain 11 and the transmission sprocket are meshed together. Compared with belt drive, chain drive has higher load-bearing capacity and tensile strength, and is suitable for large load and high precision transmission requirements.

[0041] The length direction of the elongated hole 2 is consistent with the longitudinal adjustment direction of the drive host body 3. The gap between the high-strength bolt 4 and the elongated hole 2 is 0.2-0.5mm, so as to realize the position adjustment of the drive host body 3 along the length direction of the elongated hole 2.

[0042] The length direction of the elongated hole 2 is consistent with the longitudinal adjustment direction of the drive host body 3, ensuring that the adjustment path is precise and controllable and avoiding deviation or misalignment; the gap between the high-strength bolt 4 and the elongated hole 2 is controlled at 0.2-0.5mm, which not only ensures smooth sliding during adjustment, but also provides stable rigid fixation after locking, preventing loosening or vibration; the use of high-strength bolt 4 ensures that the preload can be maintained during repeated adjustment and locking, avoiding thread stripping or deformation;

[0043] The gap (0.2-0.5mm) between the high-strength bolt 4 and the elongated hole 2 provides a buffer space for the thermal expansion and contraction or vibration of the drive host during operation, avoiding stress concentration or bolt shear failure caused by rigid fixing; small displacements can be monitored in real time by the triggering mechanism (the irregularly shaped switch striking plate 6 and the limit switch 8) to ensure that the protection is triggered in time when the displacement exceeds the limit.

[0044] The precision gap of 0.2-0.5mm provides compensation space for the thermal expansion / contraction of the drive host body 3 during operation, effectively absorbs material deformation, and avoids rigid constraint stress caused by temperature changes; the gap buffering effect significantly reduces vibration transmission, prevents the high-strength bolts 4 from bearing alternating shear force, and fundamentally eliminates the risk of bolt fatigue fracture.

[0045] The radius of curvature of the arc-shaped groove 7 is 0.5-1.5mm larger than the radius of the roller of the limit switch 8, and the central angle of the arc is 90° to 120°;

[0046] The "guide funnel" effect created by the radius difference enables the roller to automatically center, reducing the lateral vibration offset by more than 60%; the optimal arc center angle range ensures that reliable contact can be achieved at the minimum trigger displacement (lower limit of 90°) while maintaining sufficient contact stroke to prevent accidental disengagement (upper limit of 120°).

[0047] The switch bracket 9 includes a first arm and a second arm that are perpendicular to each other. The first arm is fixedly connected to the limit switch 8 by bolts, and the second arm is fixedly connected to the tightening bolt 10 by threads. The tightening bolt 10 is horizontally installed on the surface of the mounting plate 1 by fasteners.

[0048] The first and second arms, which are perpendicular to each other, form the basis for adjusting the spatial rectangular coordinate system. With the thread fine-tuning function of the tightening bolt 10, the limit switch 8 can be precisely calibrated in three dimensions within the range of ±5mm.

[0049] The first arm of the switch bracket 9 is provided with an elongated hole for adjusting the installation position of the limit switch 8;

[0050] The elongated hole structure allows the limit switch 8 to be steplessly adjusted within a range of ±3mm, with an adjustment accuracy of up to 0.1mm;

[0051] The axis of the tightening bolt 10 is perpendicular to the side of the drive host body 3. One end of the tightening bolt 10 is in close contact with the side of the drive host body 3 through a spherical washer. The other end of the tightening bolt 10 is provided with a nut for adjusting the tightening force.

[0052] The axis of the tightening bolt 10 is strictly perpendicular to the side of the drive host body 3 to ensure that the tightening force is transmitted along the normal direction and avoid eccentric load or structural deformation caused by lateral component force.

[0053] The teeth of the transmission sprocket are carburized and quenched, and the surface hardness reaches HRC55-60.

[0054] After heat treatment, the tooth profile is controlled within the GB / T100955 standard through precision grinding. The surface hardness uniformity is ±1.5HRC, ensuring uniform load distribution during multi-tooth meshing. The surface hardness can resist the fretting wear of the chain rollers, making it particularly suitable for high-speed (>15m / s) or frequent forward and reverse rotation conditions.

[0055] Working principle: Before using this type of drive host displacement protection device, it is necessary to check the overall condition of the device to ensure that it can work normally. Figure 1 - Figure 4 As shown:

[0056] Installation and initial adjustment of the drive unit

[0057] Longitudinal adjustment: The main drive unit 3 is fixed to the mounting plate 1 by four high-strength bolts 4. The bolts pass through the elongated holes 2 (gap 0.2-0.5mm), allowing the main unit to be finely adjusted in position along the direction of the elongated holes;

[0058] Drive chain 11 tension adjustment: During installation or maintenance, first loosen the high-strength bolt 4, and push the drive host body 3 backward by tightening the bolt 10 to make the transmission sprocket and drive chain 11 reach a suitable tension. Then tighten the high-strength bolt 4 again to ensure that the host position is fixed.

[0059] Rigid constraints (limiting mechanisms) for lateral displacement

[0060] The limit stop 5 is fixed to the mounting plate 1 by bolts. Its inner sidewall is tightly fitted to the left and right sides of the drive host body 3 to form a mechanical block. When the drive host body 3 has a tendency to move laterally due to vibration or load changes, the limit stop 5 directly abuts against the sidewall of the host to prevent it from shifting left and right, thus eliminating the problem of "lateral monitoring blind spot" in the background technology.

[0061] Longitudinal displacement detection and triggering (triggering mechanism)

[0062] The irregularly shaped switch striking plate 6 is fixed to the bottom of the drive host body 3, and the arc-shaped groove 7 at its end maintains initial alignment with the roller of the limit switch 8 (the groove radius is 0.5-1.5mm larger than the roller); the independently installed limit switch 8 is fixed to the top bolt 10 by the switch bracket 9, and is completely decoupled from the fixing bolt of the drive host body 3. Even if the bolt of the drive host body 3 is loose, the reference position of the limit switch 8 remains stable.

[0063] Displacement triggering mechanism: If the main drive body 3 is longitudinally displaced due to loose bolts or vibration, the irregularly shaped switch striking plate 6 moves with the main body, causing the arc-shaped groove 7 to disengage from the roller, triggering the limit switch 8 to act and issuing an alarm or stop signal; the elongated hole design (first arm of the switch bracket) allows for fine adjustment of the limit switch position to ensure trigger sensitivity;

[0064] Enhanced transmission stability (transmission mechanism)

[0065] The carburized and quenched sprocket (HRC55-60) significantly improves the wear resistance of the teeth and reduces transmission vibration caused by sprocket wear, thereby reducing the risk of displacement of the drive host from the source. After the drive chain 11 is tensioned, the elongated hole structure 2 allows the host to fine-tune its position, ensuring that the chain is always in the best meshing state, further reducing the causes of abnormal vibration.

[0066] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A displacement protection device for a drive host, comprising: The mounting plate (1), the drive host body (3), the limiting mechanism, the triggering mechanism, and the transmission mechanism are characterized by: The mounting plate (1) has elongated holes (2) symmetrically arranged in the four corner areas. The drive host body (3) is fixed to the surface of the mounting plate (1) by high-strength bolts (4) that pass through the elongated holes (2). The high-strength bolts (4) and the elongated holes (2) are fitted together to form a longitudinal adjustment structure. The limiting mechanism includes limiting bars (5) symmetrically arranged on the left and right sides of the bottom of the drive host body (3). The inner sidewall of the limiting bar (5) is closely fitted with the sidewall of the drive host body (3). The limiting bar (5) and the mounting plate (1) are fixedly connected by bolts to form a transverse displacement limiting structure. The triggering mechanism includes a shaped switch striking plate (6) and a limit switch (8). The shaped switch striking plate (6) is fixed to the bottom side of the drive host body (3) by bolts. Its extended end is provided with an arc-shaped groove (7) that is adapted to the roller of the limit switch (8). The limit switch (8) is mounted on the tightening bolt (10) by a switch bracket (9). The transmission mechanism includes a transmission sprocket fixed to the output end of the drive host body (3) by a key connection, and a drive chain (11) meshing with the transmission sprocket.

2. The drive host displacement protection device according to claim 1, characterized in that: The length direction of the elongated hole (2) is consistent with the longitudinal adjustment direction of the drive host body (3). The gap between the high-strength bolt (4) and the elongated hole (2) is 0.2-0.5mm, so as to realize the position adjustment of the drive host body (3) along the length direction of the elongated hole (2).

3. The drive host displacement protection device according to claim 1, characterized in that: The radius of the arc-shaped groove (7) is 0.5-1.5 mm larger than the radius of the roller of the limit switch (8), and the arc center angle is 90° to 120°.

4. The drive host displacement protection device according to claim 1, characterized in that: The switch bracket (9) includes a first arm and a second arm that are perpendicular to each other. The first arm is fixedly connected to the limit switch (8) by bolts, and the second arm is fixedly connected to the tightening bolt (10) by threads. The tightening bolt (10) is horizontally installed on the surface of the mounting plate (1) by fasteners.

5. The drive host displacement protection device according to claim 4, characterized in that: The first arm of the switch bracket (9) is provided with an elongated hole for adjusting the installation position of the limit switch (8).

6. The drive host displacement protection device according to claim 1, characterized in that: The axis of the tightening bolt (10) is perpendicular to the side of the drive host body (3). One end of the tightening bolt (10) is in close contact with the side of the drive host body (3) through a spherical washer. The other end of the tightening bolt (10) is provided with a nut for adjusting the tightening force.

7. The drive host displacement protection device according to claim 1, characterized in that: The teeth of the transmission sprocket are carburized and quenched, and the surface hardness reaches HRC55-60.

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