Novel lock tooth synchronous detection mechanism

Abstract

The utility model belongs to the technical field of lifting machines of motor vehicles, and particularly relates to a novel lock tooth synchronous detection mechanism. The novel lock tooth synchronous detection mechanism provided by the utility model is better in use effect. The device comprises a cross beam assembly (1b) of the lifting machine and a limit switch (5a), and is characterized in that a cylinder positioning frame (10a) is arranged on the cross beam assembly (1b), the upper end of the cylinder positioning frame (10a) is connected with the rear end of a shell of an unlocking cylinder (8a) through a cylinder support (9a), external threads are arranged on the front portion of the shell of the unlocking cylinder (8a), and an adjusting nut (7a) is screwed on the outer wall of the front portion of the shell of the unlocking cylinder (8a). The front end of a shell of the unlocking air cylinder (8a) is screwed into a threaded hole in the rear portion of the spacer bush (6a), a limiting sleeve (2a) is arranged at an opening in the front end of the spacer bush (6a), and the front end of a telescopic rod of the unlocking air cylinder (8a) penetrates through the limiting sleeve (2a) to be connected with the rear end of the Y-shaped connector (4a).

Description

TECHNICAL FIELD

[0001] The utility model belongs to the lifting machine technical field of motor vehicle, especially relate to a novel lock tooth synchronous detection mechanism. BACKGROUND

[0002] Four column lifting machine mainly is through crossbeam lock block, lock the lock plate in the stand, guarantee the locking of lifting platform firm, in order to promote the accuracy of lock tooth, and synchronism, require lock tooth work, can timely and effectively show, to remind operator to use safety. Prevent the platform because of lock tooth problem, leading to the platform inclination. Because the safety demand increases year by year, this requires product should be constantly upgraded, to adapt to the needs of customers. The existing lock tooth synchronous detection mechanism (such as the lock tooth mechanism in the patent "2202222921939.4 a lifting machine control device"), sometimes also detect lock tooth signal when not locking tooth, that is, as long as the lock block approaches the position, it is possible to trigger the limit switch. CONTENT OF THE UTILITY MODEL

[0003] The utility model is just in view of above -mentioned problem, provide a novel lock tooth synchronous detection mechanism with better use effect.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme, the utility model discloses a crossbeam assembly (1b) and limit switch (5a) of lifting machine, characterized in that the crossbeam assembly (1b) is provided with cylinder positioning bracket (10a), the upper end of cylinder positioning bracket (10a) is connected with the rear end of unlocking cylinder (8a) shell through cylinder support (9a), the front part of unlocking cylinder (8a) shell has external thread, the outer wall of the front part of unlocking cylinder (8a) shell is screwed with adjusting nut (7a), the front end of unlocking cylinder (8a) shell is screwed into the threaded hole of the rear part of spacer sleeve (6a), the front end opening of spacer sleeve (6a) is provided with limit sleeve (2a), the front end of the telescopic rod of unlocking cylinder (8a) is connected with the rear end of Y type joint (4a) through limit sleeve (2a), the front end of Y type joint (4a) is connected with lock tooth assembly (3a);

[0005] The outer side of the telescopic rod placed in spacer sleeve (6a) is sleeved with compression spring (1a), the front end of compression spring (1a) is abutted on the rear end of limit sleeve (2a), and the rear end of compression spring (1a) is abutted on the annular end face on the inner wall of unlocking cylinder (8a) shell;

[0006] Limit switch (5a) is arranged on crossbeam assembly (1b).

[0007] As a preferred scheme, the cylinder positioning bracket (10a) is connected with the crossbeam assembly (1b) through bolts.

[0008] As another preferred, the utility model discloses the upper end of cylinder positioning frame (10a) is connected with the lower end of cylinder support (9a) through the internal hexagonal cylindrical head screw, and the upper end of cylinder positioning frame (10a) is connected with the rear end of unlocking cylinder (8a) through the fixed pin.

[0009] As another preferred, the utility model lifts the oil hole on the cylinder cover of main oil cylinder (2f) is connected with the main oil cylinder oil pipe interface B of valve plate (20f) through bend joint (12f), internal thread joint (11f), compression spring (10f), throttle core (9f), combined washer (8f), first direct head (5f), main oil cylinder oil pipe (13f) in proper order, and the oil hole of the cylinder bottom of main oil cylinder (2f) is connected with the oil return hole of pump station (1f) through quick -wrench bend joint (6f), oil return pipe (18f) in proper order, and the silencer (21f) is arranged on quick -wrench bend joint (6f).

[0010] Secondly, the utility model discloses valve plate (20f) includes main oil pipe interface P, substation oil pipe interface A, main oil cylinder oil pipe interface B, and main oil pipe interface P is connected with main oil cylinder oil pipe interface B, substation electromagnetic valve (25f) first port respectively through female station electromagnetic valve (24f), and substation electromagnetic valve (25f) second port is connected with substation oil pipe interface A.

[0011] In addition, the utility model lifts the oil hole of the cylinder bottom of substation main oil cylinder (3f) is connected with the substation oil pipe interface A of valve plate (20f) through substation oil pipe (14f), and the oil hole of the cylinder tube of substation main oil cylinder (3f) is connected with the oil hole of the cylinder bottom of substation auxiliary oil cylinder (4f) through substation upper cavity oil pipe (32f), second direct head (15f), substation lower cavity oil pipe (16f) in proper order, and the oil hole of the cylinder tube of substation auxiliary oil cylinder (4f) is connected with the valve plate oil return hole of pump station (1f) through quick -wrench joint (19f), substation oil return pipe (7f) in proper order;Valve plate (20f) main oil pipe interface P is connected with the valve plate oil outlet hole of pump station (1f) through main oil pipe (17f), three -way (22f) in proper order.

[0012] The utility model has the advantages of the following.

[0013] The utility model sets up compression spring (1a) and spacer sleeve (6a), and equivalent to increase the moment of force of lock tooth instant,

[0014] The compression spring (1a) provides a precise torque to provide feedback on the instantaneous force state of the locking teeth. Without the locking teeth's action, the limit switch (5a) in the crossbeam will not be triggered. The compression spring (1a) is necessary to ensure that the locking teeth, after resisting the force of the compression spring (1a), hit the limit switch (5a)—a confirmation process. Previous structures (such as the locking tooth mechanism in patent "2202222921939.4 A Lift Control Device") lacked the compression spring (1a). If the locking block approached the position, it was possible that the teeth wouldn't lock properly, yet the limit switch (5a) would still be triggered. The adjusting nut (7a) adjusts the compression length of the compression spring (1a) to accommodate the force of the locking block hitting the limit switch (5a). Now, the instantaneous force provided when the teeth lock is necessary.

[0015] As can be seen from the above, the present invention provides a compression spring (1a) and a spacer (6a) to further determine the working state of the locking teeth, avoid detecting the locking signal when the teeth are not locked, and improve the reliability of the device. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the electrical control box structure of this utility model.

[0019] Figure 3 , 4 This is the electrical schematic diagram of this utility model. Figure 3 , 4 The X, Y, and Z nodes in the data are... Figure 3 , 4 The docking point.

[0020] Figure 5 This is a hydraulic schematic diagram of this utility model.

[0021] Figure 6 This is a structural diagram of the valve plate of this utility model.

[0022] Figure 7 yes Figure 1 Enlarged view of part A. Detailed Implementation

[0023] As shown in the figure, the utility model includes crossbeam assembly (1b) and limit switch (5a), crossbeam assembly (1b) is provided with cylinder positioning frame (10a), the upper end of cylinder positioning frame (10a) is connected with the rear end of unlocking cylinder (8a) shell through cylinder support (9a), the front part of unlocking cylinder (8a) shell has external thread, the outer wall of the front part of unlocking cylinder (8a) shell is screwed with adjusting nut (7a), the front end of unlocking cylinder (8a) shell is screwed into the rear threaded hole of spacer sleeve (6a), the front end of spacer sleeve (6a) is provided with limit sleeve (2a) at the opening, the front end of unlocking cylinder (8a) is connected with the rear end of Y type joint (4a) through limit sleeve (2a), the front end of Y type joint (4a) is connected with lock tooth combination (3a).

[0024] The outer side of the telescopic rod placed in spacer sleeve (6a) is sleeved with compression spring (1a), the front end of compression spring (1a) is abutted on the rear end of limit sleeve (2a), and the rear end of compression spring (1a) is abutted on the annular end face of the inner wall of unlocking cylinder (8a) shell.

[0025] Limit switch (5a) is arranged on crossbeam assembly (1b).

[0026] The cylinder positioning frame (10a) is connected with crossbeam assembly (1b) through bolts.

[0027] The upper end of cylinder positioning frame (10a) is connected with the lower end of cylinder support (9a) through the internal hexagonal cylindrical head screw, and the upper end of cylinder positioning frame (10a) is connected with the rear end of unlocking cylinder (8a) through the fixing pin.

[0028] When the lock tooth is needed, the lock tooth switch (4c) is pressed (the lock tooth switch (4c) is connected with the lock tooth combination (3a) through the wire, and the lock tooth combination (3a) is connected with the rear end of the telescopic rod of unlocking cylinder (8a) through the wire), Figure 2 The female platform lock tooth button SB3 (the female platform lock tooth button SB3 is connected with the lock tooth combination (3a) through the wire, and the lock tooth combination (3a) is connected with the rear end of the telescopic rod of unlocking cylinder (8a) through the wire), Figure 3 , 4 Two SB3s indicate the same switch), the descending solenoid valve YV4 in the circuit is electrified, and the unloading oil way in the valve plate (20f) is opened. The descending is controlled through the descending solenoid valve YV4. Figure 5 In the main oil cylinder (2f) upper chamber, the hydraulic oil flows out through the oil pipe (13f) and returns to the oil tank of the pump station (1f) through the valve plate (20f) and the main oil pipe (17f), and the descending unloading valve (11) is installed on the pump station (1f).

[0029] The hydraulic oil in the main oil cylinder upper chamber in the female platform flows out through the oil pipe (13f) and returns to the pump station oil tank (1f), and at this time, the main oil cylinder is extended, and the steel wire rope in the stand is lengthened. Under the gravity of the equipment and the maintenance vehicle, the female platform drives the crossbeam to slowly descend, because in this process, the unlocking electromagnetic valve QV2 (that is, Figure 4The electromagnetic valve QV2 in the middle base air cylinder is not powered, and the locking tooth fitting 3a is inserted into the square hole of the vertical column locking strip during the slow descending process (the same as the action process of the detection locking block 60 in the patent "202222921939.4 A lifting machine control device", and the utility model adds a detection function according to the action).

[0030] At this time, the locking tooth fitting 3a rotates clockwise and approaches the limit switch 5a (the limit switch 5a is the detection switch SQ6 in the patent "202222921939.4 A lifting machine control device", and the utility model upgrades the control part to PLC). At this time, the pulling force of the unlocking cylinder 8a and the pushing force of the compression spring 1a are balanced (the action process and effect of the unlocking cylinder 8a are the same as those of the unlocking cylinder 900 in the patent "202222921939.4 A lifting machine control device").

[0031] The utility model compression spring 1a provides an accurate moment of force to feedback the force state of the locking tooth at the moment, and if there is no locking tooth action, the limit switch 5a in the cross beam will not be triggered, and the circuit principle is connected in series through SQ7 / SQ8 / SQ9 / SQ10 ( Figure 4 ), and the indicator light will be powered on only when all the switches are in a closed state, and the cross beam locking tooth indicator light is HG2 in Figure 4 .

[0032] The switch 5a only indicates the installation position of the limit switch SQ7 / SQ8 / SQ9 / SQ10 in the cross beam, and the compression spring 1a can make the locking tooth resist the force of the compression spring 1a and then hit the limit switch 5a, which is a confirmation process. Without the compression spring 1a before, the locking tooth may not be locked, and the limit switch 5a may also be hit. The adjusting nut 7a adjusts the compression length of the compression spring 1a to adapt to the force of the locking block hitting the limit switch 5a.

[0033] The utility model adds the compression spring 1a, which adds an action between the locking tooth and the unlocking. If the four locking blocks in the cross beam do not lock the locking plate at the same time, the indicator light HG2 will not light, indicating that the vehicle maintenance at this time is in an unsafe state, and this function further improves the safety level of the equipment. In the patent "202222921939.4 A lifting machine control device", the locking state of the four locking blocks is judged, and the operator needs to walk around the equipment to check carefully. After upgrading to the utility model, time and labor are saved, and efficiency is improved.

[0034] As the mother platform continues to descend, the locking tooth assembly (3a) presses against the limit switch (5a) and is limited by the square steel in the crossbeam. At this time, the crossbeam is in the locking tooth state. Because each machine contains two crossbeam assemblies, there are a total of 4 locking tooth points. When all locking tooth points are in the locking tooth state, the electrical control box ( Figure 2 When the white indicator light (11c) on the panel illuminates, it indicates that the vehicle is in a safe locking state and maintenance work can begin.

[0035] The branch oil pipe and the main oil pipe are connected by a valve plate (20f), and the oil circuit is controlled by a solenoid valve. The specific structure is as follows: Figure 6 .

[0036] like Figure 5 , 6 As shown, valve plate 20f includes main oil pipe interface P, sub-platform oil pipe interface A, and main oil cylinder oil pipe interface B. The main oil pipe interface P is connected to the main oil cylinder oil pipe interface B and the first port of the sub-platform solenoid valve (25f) through the mother solenoid valve (24f). The second port of the sub-platform solenoid valve (25f) is connected to the sub-platform oil pipe interface A.

[0037] like Figure 5 , 6 As shown, the master solenoid valve (24f) is the main valve of the valve plate (20f). If the master solenoid valve (24f) is not open, even if the slave solenoid valve (25f) is open, the main oil pipe interface P will not be connected to the slave oil pipe interface A. The raising and lowering of the master or slave can be controlled by controlling the master solenoid valve (24f) or the slave solenoid valve (25f).

[0038] When repairing a motor vehicle, lower the main platform and sub-platform to their lowest points. Use the ramp to drive the vehicle onto the main platform. Press the main platform lift switch (6c) to raise the vehicle to the appropriate position. Then press the locking switch (4c). When the locking indicator light (11c) illuminates, repair work can begin. If tire replacement or other maintenance is required, press the sub-platform lift switch (9c) to lift the vehicle chassis before performing tire replacement or similar work.

[0039] To ensure high-speed, efficient, and precise control of all actions, timely feedback of detection signals, improve overall reliability and future upgrade scalability, and also consider maintainability after a failure, the electrical system ( Figure 4 The device utilizes a programmable logic controller (PLC). Furthermore, to ensure safety during control circuit operation, a 24V DC switching power supply was selected. This utility model incorporates the features described in patent "202222921939.4 A Lift Control Device". Figure 1 The relay control method in the system has been upgraded to PLC control.

[0040] The oil holes on the cylinder head of the main cylinder (2f) are connected in sequence to the main cylinder oil pipe interface B of the valve plate (20f) via a bend joint (12f), an internal threaded joint (11f), a compression spring (10f), a throttle core (9f), a combination washer (8f), a first direct connector (5f), and the main cylinder oil pipe (13f). The oil holes at the bottom of the main cylinder (2f) are connected in sequence to the return oil hole of the pump station (1f) via a quick-tight bend joint (6f) and a return oil pipe (18f). A muffler (21f) is installed on the quick-tight bend joint (6f). When the pump station (1f) does not have a return oil hole, the quick-tight bend joint (6f) and the return oil pipe (18f) can be removed and replaced with a muffler (21f).

[0041] The bottom oil hole of the main cylinder (3f) is connected to the sub-stage oil pipe interface A of the valve plate (20f) through the sub-stage oil pipe (14f). The cylinder oil hole of the main cylinder (3f) is connected to the bottom oil hole of the auxiliary cylinder (4f) through the sub-stage upper cavity oil pipe (32f), the second direct connector (15f), and the sub-stage lower cavity oil pipe (16f). The cylinder oil hole of the auxiliary cylinder (4f) is connected to the valve plate return hole of the pump station (1f) through the quick-connect fitting (19f) and the sub-stage return oil pipe (7f). The main oil pipe interface P of the valve plate (20f) is connected to the valve plate outlet hole of the pump station (1f) through the main oil pipe (17f) and the tee (22f). A tee (22f) with a plug (23f) is provided. The plug (23f) can be used to connect an external pressure gauge.

[0042] To achieve a smooth state during the locking and descent of the four-post lift, the hydraulic system ( Figure 5 In this invention, a throttle valve (9f) is added; between the cylinder (2f) and the oil pipe (13f), a connecting elbow (12f) is used to connect an internal threaded connector (11f), a compression spring (10f), a combination washer (8f), and a first direct connector (5f). This ensures that the hydraulic oil flow through the throttle valve is relatively small, resulting in a slower descent speed, thus making the equipment run more smoothly and the locking gear operation more stable. This utility model hydraulic system is described in patent "202410036854.9 A New Type of Four-Post Lift". Figure 6 Based on the previous version, some auxiliary connecting components were added.

[0043] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A novel lock tooth synchronization detection mechanism comprising a crossbeam assembly (1b) of a hoist and a limit switch (5a), characterized in that The crossbeam assembly (1b) is provided with a cylinder positioning frame (10a), the upper end of the cylinder positioning frame (10a) is connected with the rear end of the unlocking cylinder (8a) shell through a cylinder support (9a), the front part of the unlocking cylinder (8a) shell is provided with external threads, the front part of the unlocking cylinder (8a) shell is screwed with an adjusting nut (7a), the front end of the unlocking cylinder (8a) shell is screwed into the rear threaded hole of a spacer sleeve (6a), the front end of the spacer sleeve (6a) is provided with a limiting sleeve (2a), the front end of the extending rod of the unlocking cylinder (8a) is connected with the rear end of a Y-shaped joint (4a) through the limiting sleeve (2a), and the front end of the Y-shaped joint (4a) is connected with a lock toothed member (3a). The extending rod placed in the spacer sleeve (6a) is sleeved with a compression spring (1a) on the outside, the front end of the compression spring (1a) is abutted against the rear end of the limiting sleeve (2a), and the rear end of the compression spring (1a) is abutted against the annular end face of the inner wall of the unlocking cylinder (8a) shell. The limiting switch (5a) is arranged on the crossbeam assembly (1b).

2. A novel lock tooth synchronization detection mechanism according to claim 1, characterized in that The cylinder positioning frame (10a) is connected with the crossbeam assembly (1b) through bolts.

3. The novel lock tooth synchronization detection mechanism according to claim 1, characterized in that The upper end of the cylinder positioning frame (10a) is connected with the lower end of the cylinder support (9a) through an internal hexagonal cylindrical head screw, and the upper end of the cylinder positioning frame (10a) is connected with the rear end of the unlocking cylinder (8a) through a fixing pin.

4. The novel lock tooth synchronization detection mechanism according to claim 1, characterized in that The oil hole on the cylinder cover of the main oil cylinder (2f) of the lifting machine is connected with the main oil cylinder oil pipe interface B of the valve plate (20f) through a bend joint (12f), an internal thread joint (11f), a compression spring (10f), a throttling core (9f), a combined gasket (8f), a first direct head (5f), a main oil cylinder oil pipe (13f) and a main oil pipe in sequence, the oil hole at the bottom of the main oil cylinder (2f) is connected with the oil return hole of the pump station (1f) through a quick twist bend joint (6f) and an oil return pipe (18f) in sequence, and the quick twist bend joint (6f) is provided with a silencer (21f).

5. A novel lock tooth synchronization detection mechanism according to claim 4, characterized in that The valve plate (20f) comprises a main oil pipe interface P, a substation oil pipe interface A and a main oil cylinder oil pipe interface B, the main oil pipe interface P is connected with the main oil cylinder oil pipe interface B and a first port of a substation electromagnetic valve (25f) respectively through a female station electromagnetic valve (24f), and a second port of the substation electromagnetic valve (25f) is connected with the substation oil pipe interface A.

6. The novel lock tooth synchronization detection mechanism according to claim 1, characterized in that The oil hole at the bottom of the substation main oil cylinder (3f) of the lifting machine is connected with the substation oil pipe interface A of the valve plate (20f) through a substation oil pipe (14f), the oil hole of the cylinder barrel of the substation main oil cylinder (3f) is connected with the oil hole at the bottom of a substation auxiliary oil cylinder (4f) through a substation upper cavity oil pipe (32f), a second direct head (15f), a substation lower cavity oil pipe (16f) and a substation auxiliary oil cylinder (4f) in sequence, the oil hole of the cylinder barrel of the substation auxiliary oil cylinder (4f) is connected with the valve plate oil return hole of the pump station (1f) through a quick twist joint (19f) and a substation oil return pipe (7f) in sequence, and the main oil pipe interface P of the valve plate (20f) is connected with the valve plate oil outlet hole of the pump station (1f) through a main oil pipe (17f) and a three-way joint (22f) in sequence.

Images