Locking air cylinder for wheel dynamic balancing machine

Abstract

The utility model discloses a locking cylinder for a wheel dynamic balancing machine and relates to the technical field of automobile maintenance. The wheel balancing machine aims to solve the problems that according to an existing wheel balancing machine, a split nut on a transmission shaft is used for fixing a wheel, use is inconvenient, and then the working efficiency is low. A locking input end of a wheel balancing machine transmission assembly is connected with an output end of a double-layer-barrel single-acting air cylinder, an inflation assembly is arranged on a base of the double-layer-barrel single-acting air cylinder, and the wheel balancing machine transmission assembly, the double-layer-barrel single-acting air cylinder and the inflation assembly are coaxially arranged. Compared with a split nut on a transmission shaft in an existing wheel balancing machine, the locking air cylinder of the structure fixes the wheel in an air cylinder telescopic mode, an operator only needs to control opening of an air path, the wheel can be fixed to the transmission shaft in the wheel balancing machine, use is convenient, and therefore work efficiency is improved. The utility model is suitable for the wheel dynamic balancing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile maintenance, and particularly relates to a locking cylinder for a wheel dynamic balancer. Background Art

[0002] A wheel dynamic balancer measures the unbalance of a wheel by analyzing the amplitude and phase of mechanical vibration generated by the rotation of the wheel. The mechanical vibration is measured in terms of movement, force or pressure by using a sensor, and this sensor converts the collected measurement results into electrical signals. The wheel dynamic balancer indicates to the user the weight and position of the balance weights fixed on the wheel hub. At present, the wheel needs to be manually sleeved on the transmission shaft of the wheel dynamic balancer, and there is a split nut on this transmission shaft, and it is necessary to manually lock the split nut on the transmission shaft in the wheel dynamic balancer to firmly install the wheel on the transmission shaft before the dynamic balance operation of the wheel can be carried out.

[0003] In summary, the existing wheel dynamic balancer uses the split nut on the transmission shaft to fix the wheel, resulting in inconvenient use and thus low work efficiency. Summary of the Utility Model

[0004] In order to solve the problems that the existing wheel dynamic balancer uses the split nut on the transmission shaft to fix the wheel, resulting in inconvenient use and thus low work efficiency, the utility model provides a locking cylinder for a wheel dynamic balancer.

[0005] The locking cylinder for a wheel dynamic balancer of the utility model comprises a wheel dynamic balancer transmission assembly 1, a double-layer single-acting cylinder 2 and an air charging assembly 3;

[0006] The locking input end of the wheel dynamic balancer transmission assembly 1 is connected to the output end of the double-layer single-acting cylinder 2. An air charging assembly 3 is arranged on the base of the double-layer single-acting cylinder 2, and the wheel dynamic balancer transmission assembly 1, the double-layer single-acting cylinder 2 and the air charging assembly 3 are coaxially arranged. During the wheel dynamic balance operation, the double-layer single-acting cylinder 2 rotates along with the wheel dynamic balancer transmission assembly 1, and the coaxial arrangement can ensure that the double-layer single-acting cylinder 2 does not bring additional unbalance to the tested wheel;

[0007] The double-layer single-acting cylinder 2 includes a front end cover 2-1, a rear end cover A 2-2, a rear end cover B 2-3, an outer cylinder 2-4, an inner cylinder 2-5, a tension screw 2-6, a nut 2-7, an L-shaped air vent 2-10, a cylinder rod 2-11, a one-way intake valve 2-12, a return spring 2-17 and a piston 2-22;

[0008] On the end face of the front end cover 2-1, two concentric annular grooves are evenly machined. One end of the inner cylinder 2-5 is inserted into the inner annular groove on the end face of the front end cover 2-1. An outer cylinder 2-4 is sleeved on the outer surface of the inner cylinder 2-5, and one end of the outer cylinder 2-4 is inserted into the outer annular groove on the end face of the front end cover 2-1. On the end face of the rear end cover A 2-2, two concentric annular grooves are also evenly machined. The other end of the inner cylinder 2-5 is inserted into the inner annular groove on the end face of the rear end cover A 2-2, and the other end of the outer cylinder 2-4 is inserted into the outer annular groove on the end face of the rear end cover A 2-2. On the other end face of the rear end cover A 2-2, there is a rear end cover B 2-3. A stepped hole is machined at the center of one end of the rear end cover B 2-3. A one-way intake valve 2-12 is arranged inside the stepped hole. The front end cover 2-1 and the rear end cover A 2-2 are connected by at least two tensioning screws 2-6, and a nut 2-7 is arranged at the end of each tensioning screw 2-6. An L-shaped vent hole 2-10 is machined on the circumferential outer surface of the rear end cover A 2-2. A piston 2-22 is arranged inside the inner cylinder 2-5. One end of the piston 2-22 is connected to one end of the cylinder rod 2-11. The other end of the cylinder rod 2-11 passes through the front end cover 2-1. A locking thread section 2-25 is machined on the outer surface of the other end of the cylinder rod 2-11. A boss is machined at the other end of the piston 2-22. A return spring 2-17 is arranged between the boss at the other end of the piston 2-22 and the end face of the rear end cover A 2-2, and the end of the return spring 2-17 is sleeved on the boss of the piston 2-22;

[0009] Further, a gasket A 2-24 is embedded in the inner annular groove of the front end cover 2-1, and a gasket B 2-13 is embedded in the outer annular groove of the front end cover 2-1;

[0010] Further, a gasket C 2-14 is embedded in the inner annular groove of the rear end cover A 2-2, and a gasket D 2-15 is embedded in the outer annular groove of the rear end cover A 2-2;

[0011] Further, an annular groove is machined on one end face of the rear end cover B 2-3. A first gasket E 2-16 is embedded in the annular groove. An annular protrusion is machined on the other end face of the rear end cover A 2-2, and the annular protrusion of the rear end cover A 2-2 is in mating connection with the annular groove of the rear end cover B 2-3;

[0012] Further, a second gasket E 2-23 is embedded in the inner bottom surface of the stepped hole at one end of the rear end cover B 2-3;

[0013] Further, the one-way intake valve 2-12 includes a valve needle 2-12-1, a gasket F 2-12-2, an I-shaped plate 2-12-3, and a valve needle spring 2-12-4;

[0014] The valve needle 2-12-1, the valve needle spring 2-12-4 and the I-shaped plate 2-12-3 are coaxially arranged in sequence from left to right, and the valve needle spring 2-12-4 is sleeved on the valve needle 2-12-1. A sealing gasket F2-12-2 is sleeved on one end of the valve needle 2-12-1;

[0015] Further, the end of the cylinder rod 2-11 in the double-layer single-acting cylinder 2 is connected to the input end of the locking assembly of the wheel dynamic balancer transmission assembly 1;

[0016] Further, a vent hole A2-8 is machined on one side of the inner cylinder 2-5 close to the front end cover 2-1, and a vent hole B2-9 is machined on the fitting part of the inner cylinder 2-5 and the outer cylinder 2-4 on the rear end cover A2-2;

[0017] Further, the inflation assembly 3 includes an inflation assembly inner ring 3-1, a bearing 3-2, an inflation assembly outer ring 3-3, an inflation cylinder 3-4, a sealing ring 3-6 and an annular sealing gasket 3-5;

[0018] The inflation assembly outer ring 3-3 is in the shape of a cylinder with a central hole. One end of the inflation assembly inner ring 3-1 is sleeved with the inflation assembly outer ring 3-3, and a bearing 3-2 is arranged between the inner wall of the inflation assembly outer ring 3-3 and the outer surface of the inflation assembly inner ring 3-1. The other end of the inflation assembly outer ring 3-3 is provided with an inflation cylinder 3-4, and the inflation assembly outer ring 3-3 and the inflation cylinder 3-4 are coaxially arranged. The inflation assembly inner ring 3-1 is provided with an inner ring central hole, and a sealing ring 3-6 is embedded in the inner part of the inner ring central hole. A circular groove is machined on the other end face of the inflation assembly inner ring 3-1, and an annular sealing gasket 3-5 is arranged in the circular groove;

[0019] Further, a U-shaped groove 3-4-3 is machined on the bottom end face of the inflation cylinder rod 3-4-1 of the inflation cylinder 3-4. An inflation air passage 3-4-2 is machined along the length direction at the center of the end face of the inflation cylinder rod 3-4-1. A threaded hole is machined at the center of the other end face of the inflation cylinder rod 3-4-1, and an inflation air nozzle 3-4-4 is arranged in the threaded hole;

[0020] Further, during use, when the pneumatic cylinder rod 3-4-1 is in the extended state, it passes through the sealing ring 3-6 and can push open the valve needle 2-12-1 of the one-way intake valve 2-12. In this way, the inflation nozzle 3-4-4 is communicated with the air chamber B2-19 through the inflation air passage 3-4-2 and the U-shaped groove 3-4-3, and is isolated from the atmosphere through the sealing ring 3-6 and the annular gasket 3-5. When the inflation nozzle 3-4-4 is connected to high-pressure gas, the high-pressure gas enters the air chamber D2-21 through the one-way intake valve 2-12, the air chamber B2-19, the vent hole B2-9, the air chamber A2-18, and the vent hole A2-8. On the other side of the piston 2-22, the L-shaped vent hole 2-10 can communicate the air chamber C2-20 with the atmosphere, and the air chamber C2-20 is always at atmospheric pressure. At this time, on the front side of the piston 2-22, the air chamber D2-21 is filled with high-pressure gas, and on the rear side of the piston 2-22, the air chamber C2-20 is filled with atmospheric gas. The pressure difference on both sides of the piston 2-22 overcomes the pressure of the return spring 2-17 and pushes the piston 2-22 backward, causing the cylinder rod 2-11 to retract and driving the locking assembly pull rod 1-2 to lock the wheel.

[0021] When the pneumatic cylinder rod 3-4-1 in the inflation assembly 3 pushes open the valve needle 2-12-1 of the one-way intake valve 2-12 and the inflation nozzle 3-4-4 is connected to atmospheric gas, the air chamber D2-21 is also connected to atmospheric gas. On both the front and rear sides of the piston 2-22, the air pressures in the air chamber D2-21 and the air chamber C2-20 are the same. Under the action of the return spring 2-17, the piston 2-22 moves forward, the cylinder rod 2-11 extends, and the locking assembly pull rod 1-2 drives to release the wheel.

[0022] After the locking or releasing action of the wheel is completed, the pneumatic cylinder rod 3-4-1 is in the retracted state. It is located at the rear end of the sealing ring 3-6. The valve needle 2-12-1 of the one-way intake valve 2-12 returns under the action of the valve needle spring 2-12-4. Under the action of the gasket F2-12-2, the air chamber B2-19 is isolated from the atmosphere and can maintain a high-pressure or atmospheric state, enabling the wheel to maintain the locked or released state. When the wheel is undergoing dynamic balance measurement, the pulley of the transmission assembly drives the locking cylinder 2 to rotate together, while the inflation cylinder 3-4 needs to be connected to an air pipe and cannot rotate. Through the bearing 3-2, the outer ring 3-3 of the inflation assembly and the inflation cylinder 3-4 can be kept fixed, and the inner ring 3-1 of the inflation assembly and the double-layer single-acting cylinder 2 connected thereto can rotate freely.

[0023] The utility model has the following beneficial effects compared with the prior art:

[0024] The utility model overcomes the shortcomings of the prior art. When the cylinder rod retracts, the wheel is locked to the transmission shaft of the balancing machine. After the wheel is locked, the transmission shaft needs to rotate to measure the dynamic balance of the wheel. The locking cylinder needs to rotate with the transmission shaft to ensure that the wheel is in a locked state. This involves two problems. One is to ensure the pressure in the cylinder to ensure the locked state of the wheel, and the other is to ensure that the cylinder can rotate freely. In this device, a one-way intake valve and an inflation assembly are provided at the tail of the locking cylinder. The one-way intake valve can keep the pressure in the cylinder after the inflation assembly is separated from the locking cylinder. The locking cylinder is provided with an inner cylinder and an outer cylinder, and the inner cylinder and the outer cylinder form a closed air chamber A. A ventilation hole A is provided at a position near the front end cover of the inner cylinder (the front end of the cylinder piston). The rear end cover is composed of rear end cover A and rear end cover B, and rear end cover A and rear end cover B can form a closed air chamber B. A ventilation hole B is provided on rear end cover A, and ventilation hole B connects air chamber A and air chamber B. A one-way intake valve is provided at the center of rear end cover B. Rear end cover A is provided with an L-shaped air hole. One end of the L-shaped ventilation hole is connected to the atmosphere, and the other end is connected to the rear end of the cylinder piston. In this way, the rear end of the piston is always connected to the atmosphere, and a return spring is provided between the rear end of the piston and rear end cover A. When the inflation assembly connects high-pressure air to the one-way intake valve, the high-pressure air enters the front end of the cylinder piston through air chamber B, ventilation hole B, air chamber A, and ventilation hole A, causing the piston to move backward and the cylinder rod to retract to lock the wheel. When the inflation assembly pushes open the valve needle of the one-way intake valve to connect normal-pressure air, the air pressures at the front and rear ends of the cylinder piston are equal, and the cylinder piston moves forward under the action of the spring, and the cylinder rod extends to release the wheel. The locking cylinder with this structure, compared with the split nut on the transmission shaft in the existing wheel dynamic balancing machine, uses the telescopic method of the cylinder to fix the wheel. The operator only needs to control the opening of the air circuit to fix the wheel on the transmission shaft of the wheel dynamic balancing machine, which is more convenient to use and thus improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view of a locking cylinder for a wheel dynamic balancing machine according to the present utility model;

[0026] Figure 2 is the front view of a double-layer single-acting cylinder in a locking cylinder for a wheel dynamic balancing machine according to the present utility model;

[0027] Figure 3 is Figure 2 the A-A cross-sectional view of the double-layer single-acting cylinder in the locking cylinder for a wheel dynamic balancing machine according to the present utility model;

[0028] Figure 4 is the front cross-sectional view of the inflation assembly in the locking cylinder for a wheel dynamic balancing machine according to the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0029] Specific Embodiment 1: In combination with Figures 1 to 3 Describe this embodiment. A locking cylinder for a wheel dynamic balancer described in this embodiment includes a transmission assembly 1 of the wheel dynamic balancer, a double-layer single-acting cylinder 2, and an inflation assembly 3;

[0030] The pulley end of the transmission assembly 1 of the wheel dynamic balancer is connected to the front end face of the double-layer single-acting cylinder 2. An inflation assembly 3 is provided on the base of the double-layer single-acting cylinder 2, and the transmission assembly 1 of the wheel dynamic balancer, the double-layer single-acting cylinder 2, and the inflation assembly 3 are coaxially arranged;

[0031] The double-layer single-acting cylinder 2 includes a front end cover 2-1, a rear end cover A 2-2, a rear end cover B 2-3, an outer cylinder 2-4, an inner cylinder 2-5, a tensioning screw 2-6, a nut 2-7, an L-shaped vent hole 2-10, a cylinder rod 2-11, a one-way intake valve 2-12, a return spring 2-17, and a piston 2-22;

[0032] Two concentric annular grooves are evenly machined on the end face of the front end cover 2-1. One end of the inner cylinder 2-5 is inserted into the inner annular groove on the end face of the front end cover 2-1. An outer cylinder 2-4 is sleeved on the outer surface of the inner cylinder 2-5. One end of the outer cylinder 2-4 is inserted into the outer annular groove on the end face of the front end cover 2-1. Two concentric annular grooves are also evenly machined on the end face of the rear end cover A 2-2. The other end of the inner cylinder 2-5 is inserted into the inner annular groove on the end face of the rear end cover A 2-2. The other end of the outer cylinder 2-4 is inserted into the outer annular groove on the end face of the rear end cover A 2-2. A rear end cover B 2-3 is provided on the other end face of the rear end cover A 2-2. A stepped hole is machined at the center of one end of the rear end cover B 2-3. A one-way intake valve 2-12 is provided inside the stepped hole. The front end cover 2-1 and the rear end cover A 2-2 are connected by at least two tensioning screws 2-6. A nut 2-7 is provided at the end of each tensioning screw 2-6. An L-shaped vent hole 2-10 is machined on the circumferential outer surface of the rear end cover A 2-2. A piston 2-22 is provided inside the inner cylinder 2-5. One end of the piston 2-22 is connected to one end of the cylinder rod 2-11. The other end of the cylinder rod 2-11 passes through the front end cover 2-1. A locking thread section 2-25 is machined on the outer surface of the other end of the cylinder rod 2-11. A boss is machined at the other end of the piston 2-22. A return spring 2-17 is provided between the boss at the other end of the piston 2-22 and the end face of the rear end cover A 2-2, and the end of the return spring 2-17 is sleeved on the boss of the piston 2-22;

[0033] In this specific embodiment, when in use, the inflation cylinder rod 3-4-1 is in the extended state, passing through the sealing ring 3-6 and capable of pushing open the valve needle 2-12-1 of the one-way intake valve 2-12. In this way, the inflation nozzle 3-4-4 is connected to the air chamber B2-19 through the inflation air passage 3-4-2 and the U-shaped groove 3-4-3, and is isolated from the atmosphere through the sealing ring 3-6 and the annular gasket 3-5. When the inflation nozzle 3-4-4 is connected to high-pressure gas, the high-pressure gas enters the air chamber D2-21 through the one-way intake valve 2-12, the air chamber B2-19, the vent hole B2-9, the air chamber A2-18, and the vent hole A2-8, pushing the piston 2-22 to move backward, and the cylinder rod 2-11 retracts, driving the locking assembly pull rod 1-2 to lock the wheel.

[0034] When the inflation cylinder rod 3-4-1 in the inflation assembly 3 pushes open the valve needle 2-12-1 of the one-way intake valve 2-12, the inflation nozzle 3-4-4 is connected to normal-pressure gas, and the air chamber D2-21 is also connected to normal-pressure gas. On both sides of the piston 2-22, the air pressures in the air chamber A2-18 and the air chamber D2-21 are the same. Under the action of the return spring 2-17, the piston 2-22 moves forward, the cylinder rod 2-11 extends, and the locking assembly pull rod 1-2 releases the wheel.

[0035] After completing the locking or releasing action of the wheel, the inflation cylinder rod 3-4-1 is in the retracted state, located at the rear end of the sealing ring 3-6. The valve needle 2-12-1 of the one-way intake valve 2-12 returns under the action of the valve needle spring 2-12-4. Under the action of the gasket F2-12-2, the air chamber B2-19 is isolated from the atmosphere, and the high-pressure or normal-pressure state can be maintained, enabling the wheel to maintain the locked or released state. When the wheel is undergoing dynamic balance measurement, the pulley of the transmission assembly drives the locking cylinder 2 to rotate together, while the inflation cylinder 3-4 needs to be connected to an air pipe and cannot rotate. Through the bearing 3-2, the outer ring 3-3 of the inflation assembly and the inflation cylinder 3-4 can be kept fixed, and the inner ring 3-1 of the inflation assembly and the double-layer single-acting cylinder 2 connected thereto can rotate freely.

[0036] Specific Embodiment 2: Figures 1 to 3 This embodiment will be described in conjunction with the above. This embodiment further limits the locking cylinder described in Specific Embodiment 1. For a locking cylinder for a wheel dynamic balancer described in this embodiment, a gasket A2-24 is embedded in the inner annular groove of the front end cover 2-1, and a gasket B2-13 is embedded in the outer annular groove of the front end cover 2-1.

[0037] Specific Embodiment 3: Figures 1 to 3To describe this embodiment, this embodiment further limits the locking cylinder described in the specific embodiment 1. For a locking cylinder for a wheel dynamic balancer described in this embodiment, a sealing gasket C2-14 is embedded in the inner annular groove of the rear end cover A2-2, and a sealing gasket D2-15 is embedded in the outer annular groove of the rear end cover A2-2.

[0038] In this specific embodiment, by embedding a sealing gasket C2-14 in the inner annular groove of the rear end cover A2-2 and a sealing gasket D2-15 in the outer annular groove of the rear end cover A2-2, the airtightness of the outer cylinder 2-4 and the inner cylinder 2-5 is improved.

[0039] Specific embodiment four: Figures 1 to 3 To describe this embodiment, this embodiment further limits the locking cylinder described in the specific embodiment 1. For a locking cylinder for a wheel dynamic balancer described in this embodiment, a ring groove is machined on one end face of the rear end cover B2-3, and a first sealing gasket E2-16 is embedded in the ring groove. A ring protrusion is machined on the other end face of the rear end cover A2-2, and the ring protrusion of the rear end cover A2-2 is in mating connection with the ring groove of the rear end cover B2-3.

[0040] Specific embodiment five: Figures 1 to 3 To describe this embodiment, this embodiment further limits the locking cylinder described in the specific embodiment 4. For a locking cylinder for a wheel dynamic balancer described in this embodiment, a second sealing gasket E2-23 is embedded in the inner bottom surface of the stepped hole at one end of the rear end cover B2-3.

[0041] Specific embodiment six: Figures 1 to 3 To describe this embodiment, this embodiment further limits the locking cylinder described in the specific embodiment 1. For a locking cylinder for a wheel dynamic balancer described in this embodiment, the one-way air inlet valve 2-12 includes a valve needle 2-12-1, a sealing gasket F2-12-2, an I-shaped plate 2-12-3, and a valve needle spring 2-12-4.

[0042] The valve needle 2-12-1, the valve needle spring 2-12-4, and the I-shaped plate 2-12-3 are coaxially arranged in sequence from left to right, and the valve needle spring 2-12-4 is sleeved on the valve needle 2-12-1, and a sealing gasket F2-12-2 is sleeved on one end of the valve needle 2-12-1.

[0043] Specific embodiment seven: Figures 1 to 3 To describe this embodiment, this embodiment further limits the locking cylinder described in the specific embodiment 1. For a locking cylinder for a wheel dynamic balancer described in this embodiment, the end of the cylinder rod 2-11 in the double-layer single-acting cylinder 2 is connected to the input end of the locking component of the wheel dynamic balancer transmission component 1.

[0044] Specific Embodiment VIII: Combining Figures 1 to 3 To describe this embodiment, this embodiment is a further limitation on the locking cylinder described in Specific Embodiment II. For a locking cylinder for a wheel dynamic balancer described in this embodiment, an air vent hole A2-8 is machined on one side of the inner cylinder 2-5 close to the front end cover 2-1, and an air vent hole B2-9 is machined on the fitting part of the inner cylinder 2-5 and the outer cylinder 2-4 of the rear end cover A2-2.

[0045] Specific Embodiment IX: Combining Figures 1 to 4 To describe this embodiment, this embodiment is a further limitation on the locking cylinder described in Specific Embodiment I. For a locking cylinder for a wheel dynamic balancer described in this embodiment, the inflation assembly 3 includes an inflation assembly inner ring 3-1, a bearing 3-2, an inflation assembly outer ring 3-3, an inflation cylinder 3-4, a sealing ring 3-6, and an annular gasket 3-5;

[0046] The inflation assembly outer ring 3-3 is in the shape of a cylinder with a central hole. One end of the inflation assembly inner ring 3-1 is sleeved with the inflation assembly outer ring 3-3, and a bearing 3-2 is provided between the inner wall of the inflation assembly outer ring 3-3 and the outer surface of the inflation assembly inner ring 3-1. The other end of the inflation assembly outer ring 3-3 is provided with an inflation cylinder 3-4, and the inflation assembly outer ring 3-3 and the inflation cylinder 3-4 are coaxially arranged. The inflation assembly inner ring 3-1 is provided with an inner ring central hole, and a sealing ring 3-6 is embedded inside the inner ring central hole. An annular groove is machined on the other end surface of the inflation assembly inner ring 3-1, and an annular gasket 3-5 is provided inside the annular groove.

[0047] Specific Embodiment X: Combining Figures 1 to 4 To describe this embodiment, this embodiment is a further limitation on the locking cylinder described in Specific Embodiment IX. For a locking cylinder for a wheel dynamic balancer described in this embodiment, a U-shaped groove 3-4-3 is machined on the bottom end surface of the inflation cylinder rod 3-4-1 of the inflation cylinder 3-4. An inflation air duct 3-4-2 is machined along the length direction at the center of the end surface of the inflation cylinder rod 3-4-1. A threaded hole is machined at the center of the other end surface of the inflation cylinder rod 3-4-1, and an inflation air nozzle 3-4-4 is provided inside the threaded hole.

[0048] Working Principle

[0049] During use, the inflatable cylinder rod 3-4-1 is in the extended state, passing through the sealing ring 3-6 and capable of pushing open the valve needle 2-12-1 of the one-way intake valve 2-12. In this way, the inflatable nozzle 3-4-4 is connected to the air chamber B 2-19 through the inflatable air passage 3-4-2 and the U-shaped groove 3-4-3, and is isolated from the atmosphere by the sealing ring 3-6 and the annular gasket 3-5. When the inflatable nozzle 3-4-4 is connected to high-pressure gas, the high-pressure gas enters the air chamber D 2-21 through the one-way intake valve 2-12, the air chamber B 2-19, the vent hole B 2-9, the air chamber A 2-18, and the vent hole A 2-8. On the other side of the piston 2-22, the L-shaped vent hole 2-10 can connect the air chamber C 2-20 to the atmosphere, and the air chamber C 2-20 is always at normal pressure. At this time, on the front side of the piston 2-22, the air chamber D 2-21 contains high-pressure gas, and on the rear side of the piston 2-22, the air chamber C 2-20 contains normal-pressure gas. The pressure difference on both sides of the piston 2-22 overcomes the pressure of the return spring 2-17, pushing the piston 2-22 backward, and the cylinder rod 2-11 retracts, driving the locking component pull rod 1-2 to lock the wheel.

[0050] When the inflatable cylinder rod 3-4-1 in the inflating assembly 3 pushes open the valve needle 2-12-1 of the one-way intake valve 2-12 and the inflatable nozzle 3-4-4 is connected to normal-pressure gas, the air chamber D 2-21 is also connected to normal-pressure gas. The air pressures in the air chamber D 2-21 and the air chamber C 2-20 are the same on both the front and rear sides of the piston 2-22. Under the action of the return spring 2-17, the piston 2-22 moves forward, and the cylinder rod 2-11 extends, driving the locking component pull rod 1-2 to release the wheel.

[0051] After completing the locking or releasing action of the wheel, the inflatable cylinder rod 3-4-1 is in the retracted state, located at the rear end of the sealing ring 3-6. The valve needle 2-12-1 of the one-way intake valve 2-12 returns under the action of the valve needle spring 2-12-4. Under the action of the gasket F 2-12-2, the air chamber B 2-19 is isolated from the atmosphere and can maintain a high-pressure or normal-pressure state, enabling the wheel to maintain the locked or released state. When measuring the dynamic balance of the wheel, the pulley of the transmission assembly drives the locking cylinder 2 to rotate together, while the inflatable cylinder 3-4 needs to be connected to an air pipe and cannot rotate. Through the bearing 3-2, the outer ring 3-3 of the inflating assembly and the inflatable cylinder 3-4 can be kept fixed, and the inner ring 3-1 of the inflating assembly and the double-layer simple-acting cylinder 2 connected thereto can rotate freely.

Claims

1. A locking cylinder for a wheel dynamic balancer, characterized in that: It includes a transmission assembly (1) of a wheel dynamic balancer, a double-layer single-acting cylinder (2), and an inflation assembly (3); The pulley end of the transmission assembly (1) of the wheel dynamic balancer is connected to the front end face of the double-layer single-acting cylinder (2). An inflation assembly (3) is provided on the base of the double-layer single-acting cylinder (2), and the transmission assembly (1) of the wheel dynamic balancer, the double-layer single-acting cylinder (2), and the inflation assembly (3) are coaxially arranged; The double-layer single-acting cylinder (2) includes a front end cover (2-1), a rear end cover A (2-2), a rear end cover B (2-3), an outer cylinder (2-4), an inner cylinder (2-5), a tensioning screw (2-6), a nut (2-7), an L-shaped ventilation hole (2-10), a cylinder rod (2-11), a one-way intake valve (2-12), a return spring (2-17), and a piston (2-22); Two concentric annular grooves are uniformly machined on the end face of the front end cover (2-1). One end of the inner cylinder (2-5) is inserted into the inner annular groove on the end face of the front end cover (2-1). An outer cylinder (2-4) is sleeved on the outer surface of the inner cylinder (2-5). One end of the outer cylinder (2-4) is inserted into the outer annular groove on the end face of the front end cover (2-1). Two concentric annular grooves are uniformly machined on the end face of the rear end cover A (2-2). The other end of the inner cylinder (2-5) is inserted into the inner annular groove on the end face of the rear end cover A (2-2). The other end of the outer cylinder (2-4) is inserted into the outer annular groove on the end face of the rear end cover A (2-2). A rear end cover B (2-3) is provided on the other end face of the rear end cover A (2-2). A stepped hole is machined at the center of one end of the rear end cover B (2-3). A one-way intake valve (2-12) is provided inside the stepped hole. The front end cover (2-1) and the rear end cover A (2-2) are connected by at least two tensioning screws (2-6). A nut (2-7) is provided at the end of each tensioning screw (2-6). An L-shaped ventilation hole (2-10) is machined on the circumferential outer surface of the rear end cover A (2-2). A piston (2-22) is provided inside the inner cylinder (2-5). One end of the piston (2-22) is connected to one end of the cylinder rod (2-11) at the center. The other end of the cylinder rod (2-11) passes through the front end cover (2-1). A locking thread section (2-25) is machined on the outer surface of the other end of the cylinder rod (2-11). A boss is machined at the other end of the piston (2-22). A return spring (2-17) is provided between the boss at the other end of the piston (2-22) and the end face of the rear end cover A (2-2), and the end of the return spring (2-17) is sleeved on the boss of the piston (2-22).

2. The locking cylinder for a wheel balancer according to claim 1, wherein: A gasket A (2-24) is embedded inside the inner annular groove of the front end cover (2-1), and a gasket B (2-13) is embedded inside the outer annular groove of the front end cover (2-1).

3. A locking cylinder for a wheel balancer according to claim 1, characterized in that: A gasket C (2-14) is embedded inside the inner annular groove of the rear end cover A (2-2), and a gasket D (2-15) is embedded inside the outer annular groove of the rear end cover A (2-2).

4. A locking cylinder for a wheel dynamic balancer according to claim 1, characterized in that: One end face of the described rear end cover B (2-3) is machined with an annular groove, and a first sealing gasket E (2-16) is embedded inside the annular groove. An annular protrusion is machined on the other end face of the rear end cover A (2-2), and the annular protrusion of the rear end cover A (2-2) is in mating connection with the annular groove of the rear end cover B (2-3).

5. A locking cylinder for a wheel dynamic balancer according to claim 4, characterized in that: A second sealing gasket E (2-23) is embedded in the inner bottom surface of the stepped hole at one end of the described rear end cover B (2-3).

6. The locking cylinder for a wheel dynamic balancer according to claim 1, characterized in that: The described one-way intake valve (2-12) includes a valve needle (2-12-1), a sealing gasket F (2-12-2), an I-shaped plate (2-12-3), and a valve needle spring (2-12-4). The valve needle (2-12-1), the valve needle spring (2-12-4), and the I-shaped plate (2-12-3) are coaxially arranged in sequence from left to right. The valve needle spring (2-12-4) is sleeved on the valve needle (2-12-1), and a sealing gasket F (2-12-2) is sleeved on one end of the valve needle (2-12-1).

7. A locking cylinder for a wheel balancer according to claim 1, characterized in that: The end of the cylinder rod (2-11) in the described double-layer single-acting cylinder (2) is connected to the input end of the locking assembly of the wheel dynamic balancer transmission assembly (1).

8. A locking cylinder for a wheel dynamic balancer according to claim 2, characterized in that: One side of the described inner cylinder (2-5) close to the front end cover (2-1) is machined with a vent hole A (2-8), and the rear end cover A (2-2) is machined with a vent hole B (2-9) at the fitting part of the inner cylinder (2-5) and the outer cylinder (2-4).

9. A locking cylinder for a wheel dynamic balancer according to claim 1, characterized in that: The described inflation assembly (3) includes an inflation assembly inner ring (3-1), a bearing (3-2), an inflation assembly outer ring (3-3), an inflation cylinder (3-4), a sealing ring (3-6), and an annular sealing gasket (3-5). The inflation assembly outer ring (3-3) is in the shape of a cylinder with a central hole. One end of the inflation assembly inner ring (3-1) is sleeved with the inflation assembly outer ring (3-3). A bearing (3-2) is provided between the inner wall of the inflation assembly outer ring (3-3) and the outer surface of the inflation assembly inner ring (3-1). An inflation cylinder (3-4) is provided at the other end of the inflation assembly outer ring (3-3), and the inflation assembly outer ring (3-3) is coaxially arranged with the inflation cylinder (3-4). The inflation assembly inner ring (3-1) is provided with an inner ring central hole, and a sealing ring (3-6) is embedded inside the inner ring central hole. An annular groove is machined on the other end face of the inflation assembly inner ring (3-1), and an annular sealing gasket (3-5) is provided inside the annular groove.

10. A locking cylinder for a wheel dynamic balancer according to claim 9, characterized in that: The bottom end face of the inflation cylinder rod (3-4-1) of the described inflation cylinder (3-4) is machined with a U-shaped groove (3-4-3). An inflation air passage (3-4-2) is machined along the length direction at the center of the end face of the inflation cylinder rod (3-4-1). A threaded hole is machined at the center of the other end face of the inflation cylinder rod (3-4-1), and an inflation air nozzle (3-4-4) is provided inside the threaded hole.

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