Supporting structure
By adopting a rolling bearing support structure and energy storage element in the high-speed train sliding door system, the problem of high frictional resistance torque of the auxiliary lock device was solved, and the driving element was reduced and the auxiliary lock was made lighter and smaller.
Patent Information
- Application Number
- CN202423008201.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In existing high-speed train sliding door systems, the auxiliary locking device uses a sliding bushing, which results in a large frictional resistance torque, increases the requirements for drive components, and makes it difficult to achieve lightweight and miniaturization.
A rolling bearing support structure is used instead of a sliding bushing. The locking tongue and the rotating components are subjected to rolling friction. Combined with an energy storage element such as a return spring, the locking tongue can be efficiently reset, reducing frictional resistance torque.
Significantly reduce the requirements for drive components, reduce the overall size and weight of the auxiliary lock, lower costs, and achieve lightweight and miniaturized design.
Smart Images
Figure CN223577747U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of train door systems, in particular to a support structure. BACKGROUND
[0002] The electrically driven compression locking device (auxiliary lock) is an important device in the domestic and foreign rail transit door system, which is used to enhance the door fan constraint, compensate the compression amount of the sealing rubber strip, thereby solving the air tightness problem of the vehicle and improving the safety performance of the door system. It is indispensable in the high-speed train door system. At present, the pneumatic auxiliary lock device is basically used in the high-speed train plug door system. The device drives the lock tongue to swing by using the cylinder as the power source to compress the door fan rubber strip. The working state of the pneumatic auxiliary lock device is affected by the air source, and its performance is greatly affected. The air source requirement of the vehicle body is high. The electric auxiliary lock solves this problem. The device uses a motor to provide driving force to drive the lock tongue to swing to realize the locking and unlocking functions. In the structure of the auxiliary lock device, the lock tongue and its support shaft need to bear the entire rebound force of the door system on the auxiliary lock and the impact force caused by the vehicle running during the locking and bearing process, which is the most stressed position in the structure. Since the sliding shaft sleeve has good bearing capacity, the existing auxiliary lock device often uses a sliding shaft sleeve to support the lock tongue and its shaft system parts and bear external forces.
[0003] The lock tongue and its support shaft need to bear the entire rebound force of the door system on the auxiliary lock and the impact force caused by the vehicle running during the locking and bearing process, which is the most stressed position in the structure. These loads generate a normal force resultant at the lock tongue and its support shaft. Since the existing auxiliary lock device often uses a sliding shaft sleeve, the friction coefficient is large, so a large friction torque is added during the swing of the lock tongue, causing a lot of additional energy loss of the auxiliary lock device and increasing the requirements on the driving elements. The increase in driving requirements also leads to an increase in the size, weight and cost of power elements such as motors, thereby causing the overall size of the auxiliary lock to increase, the weight to increase, the cost to increase, and it is difficult to achieve the lightweight and miniaturization of the auxiliary lock. CONTENT OF THE UTILITY MODEL
[0004] The purpose of the present application is to provide a support structure to solve the defects in the prior art that the use of a sliding shaft sleeve in the auxiliary lock causes a large friction torque, the driving elements of the auxiliary lock have high requirements, and it is difficult to achieve the lightweight and miniaturization of the overall structure of the auxiliary lock.
[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:
[0006] A support structure for mounting a lock tongue, comprising
[0007] A lock body provided with a mounting cavity;
[0008] The lock tongue is rotatably installed in the installation cavity through a rotating assembly, an energy storage element is connected between the lock tongue and the lock body, the lock tongue rotates along the radial direction of the rotating assembly under force, the lock tongue and the rotating assembly are in rolling friction, the lock tongue loses force, the energy storage element releases energy to drive the lock tongue to reset.
[0009] A limiting assembly is fixed on the lock body on both sides of the rotating assembly in the axial direction, and is used for limiting the axial end points of the rotating assembly.
[0010] In a further aspect of the present application, the rotating assembly comprises a lock tongue shaft and at least one rolling bearing, the lock tongue shaft is fixed on the upper and lower ends of the installation cavity, the lock tongue is hollow, and the lock tongue shaft passes through the inner ring of at least one rolling bearing; the lock tongue is under force, and at least one rolling bearing constitutes a first support structure; the two ends of the lock tongue shaft and the lock body constitute a second support structure.
[0011] In a further aspect of the present application, a spacer sleeve is arranged in the cavity of the lock tongue, and the lock tongue shaft passes through the spacer sleeve.
[0012] In a further aspect of the present application, the rolling bearings are multiple, the multiple rolling bearings are fixed in the cavity of the lock tongue at intervals, and the multiple rolling bearings are separated by the spacer sleeve.
[0013] In a further aspect of the present application, the energy storage element is a reset spring, the reset spring is coaxially installed on any one of the guide cylinders, one end of the reset spring is fixed in the spring mounting hole of the lock tongue, and the other end of the reset spring is connected with a stop pin on the lock body.
[0014] In a further aspect of the present application, the limiting assembly comprises a top cover and a second fixing member, the top cover is arranged on the top of the lock body and contacts one end of the rotating assembly, the top cover and the lock body are fixed through a first fixing member, the second fixing member is fixed on the bottom of the lock body, a stop sheet is arranged on the second fixing member, and the stop sheet contacts the other end of the rotating assembly.
[0015] In a further aspect of the present application, grease is arranged between the rotating assembly and the lock tongue.
[0016] In a further aspect of the present application, the rotating assembly is vertically installed in the installation cavity.
[0017] The present application has the following beneficial effects:
[0018] The rotating assembly is used in the application instead of the sliding sleeve in the conventional technology, so that the sliding friction is changed into rolling friction when the lock tongue moves, the additional friction torque in the lock tongue swinging process is significantly reduced, and the requirement for the driving element is significantly reduced. Since the requirement for the driving element such as a motor is reduced, the volume, mass and cost of the driving element are reduced, and then the overall structure size of the auxiliary lock is reduced, the weight is reduced, the cost is reduced, the lightweight and small-sized design of the device is realized.
[0019] In the structure, the energy storage element uses a return spring, so that the driving element has a synchronous (energy storage) effect on the return spring during the process of driving the lock tongue to rotate, and when the return spring is elastically released for resetting after the lock tongue loses power, the lock tongue is driven to reset automatically and efficiently. The structure design is ingenious, and the use cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is an axial sectional view of the support structure of the embodiment of the application;
[0021] Figure 2 It is a structural schematic view of the support structure of the embodiment of the application;
[0022] Figure 3 It is a working state structure schematic view of the support structure in the embodiment of the application;
[0023] Among them:
[0024] 1, lock body; 2, return spring; 3, lock tongue; 4, lock tongue shaft; 5, top cover; 6, first fixing part; 7, rolling bearing; 8, spacer sleeve; 9, second fixing part; 10, stop piece; 11, lock catch. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the application will be described clearly and completely in the embodiments of the application combined with the drawings. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the application and its application or use.
[0026] As Figure 1 and Figure 2As shown, the auxiliary lock support structure disclosed in the embodiment includes a lock body 1, a lock tongue 3, and a limiting assembly, wherein the lock body 1 is provided with a mounting cavity; the mounting cavity is actually a mounting area, which is usually formed together with the lock body 1 during the casting process; the lock tongue 3 is rotatably installed in the mounting cavity through a rotating assembly; in the embodiment, the rotating assembly is vertically installed in the mounting cavity; an energy storage element is connected between the lock tongue 3 and the lock body 1; the lock tongue 3 rotates along the radial direction of the rotating assembly under force; the lock tongue 3 loses force; at this time, the energy storage element moves to reset the lock tongue 3; the limiting assembly is fixed on the lock body 1 on both sides of the axial direction of the rotating assembly, and is used for limiting the axial end points of the rotating assembly.
[0027] In use, the driving element drives the lock tongue 3 to rotate until the lock tongue 3 contacts the related workpiece; in the process of rotating the lock tongue 3, the energy storage element is deformed by a certain amount within a reasonable range, which can be understood as charging the energy storage element; and due to the rolling friction between the rotating assembly and the lock tongue 3, the friction coefficient of the lock tongue 3 and the rotating assembly is very small, that is, the driving resistance is very small; the driving element of the embodiment only needs a small driving power, thereby reducing the cost of the driving element; when the driving element stops acting on the lock tongue 3, the lock tongue 3 is finally driven to reset efficiently under the rotary motion of the energy storage element; the whole device is energy-saving and efficient, and can be integrated and lightened.
[0028] As shown in the accompanying Figure 1 In the embodiment, the rotating assembly includes a lock tongue shaft 4 and two rolling bearings 7; the lock tongue shaft 4 is fixed on the upper and lower ends of the mounting cavity; the lock tongue 3 is internally provided with a hollow structure; the two rolling bearings 7 are fixed on both ends of the cavity of the lock tongue 3 at intervals; and the lock tongue shaft 4 passes through the inner rings of the two rolling bearings 7; under force, the two rolling bearings 7 form a first simply supported beam structure; the two ends of the lock tongue shaft 4 form a second simply supported beam structure with the lock body 1; and the installation of the rolling bearings 7 greatly reduces the friction force acting on the lock tongue shaft 4, thereby reducing the driving force for driving the lock tongue 3, and facilitating the driving of the driving element.
[0029] In some embodiments, the cavity of the lock tongue 3 extends two guide cylinders; the two guide cylinders and the axial center line of the cavity of the lock body 1 are arranged in line; the two rolling bearings 7 are correspondingly installed in the two guide cylinders; and a spacer sleeve 8 is installed in the middle of the cavity of the lock tongue 3; the spacer sleeve 8 is helpful for storing grease for lubrication and separating the plurality of rolling bearings 7, thereby improving the performance and service life of the whole machine.
[0030] In some embodiments, considering that the frequency of movement between the parts in the structure is high, grease is applied on the cavity of the lock tongue 3, the rolling bearings 7, the lock tongue shaft 4, and the spacer sleeve 8 during installation, thereby effectively maintaining the parts.
[0031] As shown in the accompanying Figure 2 and Figure 3The energy storage element in the embodiment is a reset spring 2, and the elastic deformation of the reset spring 2 is used to automatically reset the moved lock tongue 3. Specifically, the reset spring 2 is coaxially installed on the guide cylinder at the bottom of the lock tongue 3, one end of the reset spring 2 is hooked into the spring mounting hole of the lock tongue 3, and the other end is connected with the stop pin on the lock body 1.
[0032] Continue to observe the attached Figure 1 The limiting assembly in the embodiment is divided into two parts, including a top cover 5 and a second fixing member 9. The top cover 5 limits the top of the lock tongue shaft 4, and the second fixing member 9 limits the bottom of the lock tongue shaft 4. The top cover 5 is arranged at the top of the lock body 1 and is fixed on the lock body 1 through the first fixing member 6. At this time, the edge of the top cover 5 is in full or partial contact with the top end of the lock tongue shaft 4. The second fixing member 9 is fixed at the bottom of the lock body 1, and the second fixing member 9 is provided with a stop sheet 10. The stop sheet 10 is in contact with the other end of the lock tongue shaft 4, and the two form a limit to the two ends of the lock tongue shaft 4 in the axial direction.
[0033] In some embodiments, bolts are used as the second fixing member 9 and the first fixing member 6. Threaded holes are provided at the corresponding positions of the lock body 1 during installation, and the bolts are screwed and locked. This is convenient for disassembly and maintenance of parts in the later period.
[0034] Working process:
[0035] As Figure 3 shown by the dashed outline, the left part of the lock tongue 3 in the present application is driven by the roller (the driving torque is M1), so that the lock tongue 3 and the internal rolling bearing 7 swing counterclockwise around the lock tongue shaft 4, the reset spring 2 stores energy, the right side of the lock tongue 3 presses the lock catch 11 (output torque M3), and reaches the locking position (black solid line outline) to complete the working process. During work, the lock tongue 3 bears the resultant force composed of the driving force and the counterforce of the lock catch 11. The resultant force is borne by the two rolling bearings 7 at both ends of the lock tongue 3, forming a first simply supported beam structure. The rolling bearing 7 transmits the load to the lock tongue shaft 4, and the lock tongue shaft 4 bears the load and forms a second simply supported beam structure with the lock body 1 at both ends. The load is transmitted to the upper and lower layers of the lock body 1 by the lock tongue shaft 4, and the load transmission process is completed. Since the relative rotation between the rolling bearing 7 and the lock tongue shaft 4 is rolling friction (μ is very small), the additional friction torque (friction torque M2) during the swing of the lock tongue 3 under load is very small.
[0036] Effect verification:
[0037] Suppose the driving torque of the lock tongue 3 is M1; the effective output torque of the lock catch 11 is M3; the normal pressure between the rolling bearing 7 and the lock tongue shaft 4 is F, and the friction torque generated during relative rolling is M2. Then there is a relationship:
[0038] (1);
[0039] In the engineering example, the effective output torque M3 is about 0.7 times the driving torque, i.e. Under the condition that other variables remain unchanged, the rolling bearing support scheme implemented by the present patent can reduce the friction coefficient from the sliding sleeve ( ) to the rolling bearing ( ). Assuming that the required driving torque at this time is M4, formula (2) can be obtained from formula (1):
[0040] (2);
[0041] The calculation result is: (3);
[0042] That is, after adopting the rolling bearing support scheme implemented by the present patent, the demand for driving torque of the electrically driven compression locking device can be significantly reduced by 30% compared with the traditional sliding sleeve support, thereby reducing the size, weight and cost of the power element such as the motor, and improving the transmission efficiency. The overall size, weight and cost of the auxiliary lock are reduced, and the lightweight and miniaturization of the device are realized.
[0043] Reset process of the lock tongue 3:
[0044] As shown in Figure 3 , during the reset process, the driving force acting on the roller part of the lock tongue 3 disappears, and the lock tongue 3 swings clockwise under the action of the counterforce of the lock catch 11 and the potential energy stored in the reset spring 2, moving from the black solid line profile position to the dashed line position, and completing the reset process. During the reset process, the lock tongue 3 is subjected to the counterforce of the lock catch 11 and is uniformly supported by the two simply supported rolling bearings 7. Since the relative rotation between the rolling bearing 7 and the lock tongue shaft 4 is rolling friction, the additional friction torque during the swing of the loaded lock tongue 3 is very small.
Claims
1. A support structure for mounting a deadbolt (3), characterized in that, The utility model provides a lock body (1), which is provided with a mounting cavity; The lock tongue (3) is rotatably installed in the mounting cavity through a rotating assembly, and an energy storage element is connected between the lock tongue (3) and the lock body (1); the lock tongue (3) rotates along the radial direction of the rotating assembly under stress, and the lock tongue (3) and the rotating assembly are in rolling friction; when the lock tongue (3) loses the stress, the energy storage element releases energy to drive the lock tongue (3) to reset; A limiting assembly is fixed on both sides of the lock body (1) along the axial direction of the rotating assembly to limit the axial end points of the rotating assembly. The rotating assembly comprises a lock tongue shaft (4) and at least one rolling bearing (7), the lock tongue shaft (4) is fixed on the upper and lower ends of the mounting cavity, the lock tongue (3) is hollow, and the lock tongue shaft (4) penetrates the inner ring of at least one rolling bearing (7); when the lock tongue (3) is stressed, at least one rolling bearing (7) constitutes a first support structure; the two ends of the lock tongue shaft (4) and the lock body (1) constitute a second support structure.
2. The support structure of claim 1, wherein, The utility model also comprises a spacer sleeve (8), which is arranged in the cavity of the lock tongue (3), and the lock tongue shaft (4) penetrates the spacer sleeve (8).
3. The support structure of claim 2, wherein, The rolling bearings (7) are multiple, and the multiple rolling bearings (7) are fixed in the cavity of the lock tongue (3) at intervals, and the multiple rolling bearings (7) are separated by the spacer sleeve (8).
4. The support structure of claim 3, wherein, The energy storage element is a reset spring (2), the reset spring (2) is coaxially installed on the guide cylinder of the lock tongue (3), one end of the reset spring (2) is fixed in the spring mounting hole of the lock tongue (3), and the other end is connected with a stop pin on the lock body (1).
5. The support structure of claim 1, wherein, The limiting assembly comprises a top cover (5) and a second fixing piece (9), the top cover (5) is arranged on the top of the lock body (1) and contacts one end of the rotating assembly, the top cover (5) and the lock body (1) are fixed through a first fixing piece (6), the second fixing piece (9) is fixed on the bottom of the lock body (1), the second fixing piece (9) is provided with a stop sheet (10), and the stop sheet (10) contacts the other end of the rotating assembly.
6. The support structure of claim 1, wherein, Grease is arranged between the rotating assembly and the lock tongue (3).
7. The support structure of claim 1, wherein, The rotating assembly is vertically installed in the mounting cavity.
8. The support structure according to any one of claims 1 to 7, characterized in that