CN201110887Y - A starter motor braking durability test device - Google Patents

Abstract

The utility model discloses a starter motor brake durability test device, which comprises a brake bracket, a ratchet shaft, a brake gear for meshing with a drive gear of the starter motor to be tested, a brake ratchet, a brake pawl and a control The drive system in which the brake pawl and the brake ratchet interfere with or disengage, the ratchet shaft is fixed on the brake bracket, and the brake ratchet is connected with the brake gear as a whole and arranged through a bearing On the ratchet shaft, the brake pawl is dynamically connected to the drive system. The starter motor braking durability test device of the utility model can replace the starter motor comprehensive performance test equipment for the starter motor durability test, has simple structure, low manufacturing and maintenance costs, reduces production costs, and improves test efficiency.

Description

A starter motor braking durability test device

technical field

The utility model relates to a starter motor test device, in particular to a device for performing a braking durability test of a starter motor of an automobile engine.

Background technique

The starter motor of an automobile engine is a device that converts electrical energy into mechanical energy and drives the flywheel of the engine to rotate to start the engine. The basic working principle of the starter motor is: after the starter motor is connected to the DC power supply, the electromagnetic switch first moves electrically, and the movable iron core drives the shift fork. Make the drive gear pop out along the motor axis, and rotate counterclockwise along the helical guide structure (viewed from the direction of the motor output shaft); after fully meshing with the engine flywheel, the starter motor rotor starts to be powered and rotates clockwise, The driving gear works towards the clutch to drive the engine to ignite and start; after the power switch is disconnected, the driving gear retracts along the axial direction of the motor under the tension of the return spring, and simultaneously rotates clockwise due to the helical guide structure (from the direction of the output shaft end of the motor) see), and eventually separates from the engine flywheel, completing the cranking process.

The starter motor durability test is one of the important contents of the starter motor performance test. The process of this test is to put the starter motor in a braking state, power on for a period of time (such as 1 second), and then power off for a period of time (such as 30 seconds), and test its durability through repeated reciprocating tests. The temperature of the qualified starter motor should not exceed 40 degrees during the experiment (air cooling is allowed), and it should be able to withstand 600 brake durability tests. After the test, the one-way clutch is not damaged, and the armature shaft, output shaft and other gears are not damaged Damaged and deformed.

At present, the braking durability test of the automobile starter motor is often carried out on the comprehensive performance test equipment of the starter motor. Because the braking durability test will produce a large impact at the moment of braking of the starter motor, it is easy to cause damage to the components of the comprehensive performance test equipment due to the large impact. Due to the complex structure and high price of the starter motor comprehensive performance test equipment, replacing parts will cause certain costs and delays for a certain period of time. The brake durability test of the automobile starter motor will occupy the comprehensive performance test equipment for a long time, making its work efficiency low.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a special starter motor braking durability test device with simple structure and low cost.

The technical solution adopted by the present invention to solve the technical problem is: a starter motor braking durability test device, including a brake bracket, a ratchet shaft, a brake gear for meshing with the drive gear of the tested starter motor, a brake ratchet, brake pawl, and a drive system that controls the friction between the brake pawl and the brake ratchet or disengagement, the ratchet shaft is fixed on the brake bracket, and the brake ratchet and the brake ratchet The movable gear is connected as a whole and arranged on the ratchet shaft through a bearing, and the brake pawl is connected with the power of the drive system.

A ratchet hinge shaft is also fixed on the brake bracket, and the brake pawl is arranged on the ratchet hinge shaft and constitutes a rotating pair with the ratchet hinge shaft.

The bearing is a deep groove ball bearing.

The drive system includes a cylinder, and the brake pawl is dynamically connected with the piston rod of the cylinder.

The cylinder is a two-way cylinder.

The tooth edges of the brake gear have chamfers.

The beneficial effects of the present invention are that the starter motor brake durability test device has a simple structure, low manufacturing and maintenance costs, can completely replace the starter motor comprehensive performance test equipment for the starter motor durability test, reduce the time occupied by the comprehensive performance test equipment, and at the same time It also avoids damage to the parts of the comprehensive performance test equipment caused by the impact in the brake durability test, reduces the production cost, and improves the production efficiency.

Description of drawings

Fig. 1 is the structural representation of a kind of starter motor braking endurance test device of the present utility model;

Fig. 2 is a sectional view along the direction A-A of Fig. 1 .

Detailed ways

As shown in Figures 1 and 2, a starter motor braking durability test device in this embodiment includes a starter motor bracket 2, a brake bracket 8, a ratchet shaft 6, a ratchet hinge shaft 7, a brake gear 3, and a brake ratchet. 4. Brake pawl 9, bearing 5 and drive system.

The brake gear 3 and the brake ratchet 4 are rigidly connected as a whole by bolts 14, the brake ratchet 4 is fixed on the outer ring of the bearing 5, the inner ring of the bearing 5 is fixed to the ratchet shaft 6, and the ratchet shaft 6 is fixed on the On the brake bracket 8, the brake ratchet 4 and the brake gear 3 can rotate around the ratchet shaft 6. In this embodiment, the bearing 5 is preferably a deep groove ball bearing. The pawl hinge shaft 7 is fixed on the brake bracket 8 and parallel to the ratchet shaft 6 , the brake pawl 9 is mounted on the pawl hinge shaft 7 , and the brake pawl 9 can rotate around the pawl hinge shaft 7 . The brake pawl 9 is connected to the piston rod of the cylinder 10 of the drive system. The cylinder 10 is a two-way cylinder. The piston rod 13 moves telescopically due to the action of the cylinder 10, so that the brake pawl 9 can rotate around the pawl hinge shaft 7. Rotate clockwise or counterclockwise to make the brake pawl 9 contact or disengage from the brake ratchet 4 .

The starter motor 1 to be tested is installed on the starter motor bracket 2 through a flange, the axis of the drive gear 12 of the starter motor 1 is parallel to the axis of the brake gear 3, and the drive gear of the starter motor can be rotated and stretched out to be connected to the brake gear 3 engage.

The working process of this embodiment is as follows:

①Fix the tested starter motor 1 on the starter motor bracket 2 with a flange, and set the power-on and power-off time of the motor 1 and the number of tests to be performed on the time on-off and test times controller as required. In this test, the power-on time can be set to 1 second, the power-off time can be set to 30 seconds, and the number of tests can be set to 600 times.

② The starter motor 1 under test and the two-position electromagnetic reversing valve of the gas path accessory of the drive system are connected to the 12V DC power supply at the same time, and the electromagnetic force of the electromagnet core of the starter motor 1 under test pushes the driving gear 12 of the starter motor 1 under test to rotate clockwise Stretch out (viewed from the tail of the starter motor 1 under test), the drive gear 12 of the starter motor 1 under test pushes in and meshes with the brake gear 3 . Simultaneously, the rear tail end of the cylinder 10 intakes air, and the piston rod 13 stretches out and pushes the brake pawl 9 to rotate, so that the brake pawl 9 collides with the brake ratchet 4 .

③When the drive gear 12 of the starter motor 1 under test reaches the position where it is completely meshed with the brake gear 3, the internal travel switch of the starter motor 1 under test is turned on, the motor rotor of the starter motor 1 under test is powered, and the brake gear 3 Start to rotate counterclockwise (viewed from the tail end of the tested starter motor 1), and now the brake ratchet 4 and the brake pawl 9 start to brake, and the tested starter motor 1 is just able to brake and stall.

④ After the tested starter motor 1 and the two-position electromagnetic reversing valve of the gas circuit accessory are powered off at the same time, the front end of the cylinder 10 will receive air, the piston rod 13 will pull back, and the brake pawl 9 will be pulled, so that the brake pawl 9 and the brake ratchet 4 disengaged completely, at this time the drive gear 12 of the starter motor 1 under test rotates counterclockwise (viewed from the tail of the starter motor) under the action of the internal spring restoring force, returns to the initial position, and completes a test.

⑤ Repeat the above ②-④ until the number of times set by the test is reached, and then the test will automatically stop.

In the above embodiment, the tooth edges of the drive gear 12 and the brake gear 3 of the starter motor 1 under test both have appropriate chamfers, so that the drive gear 12 can be pushed into the brake gear 3 smoothly. The brake gear 3 and the brake ratchet 4 are rigidly connected and fixed on the brake bracket 8 through deep groove ball bearings so as to be free to rotate. Due to the cooperating structure of the brake ratchet 4 and the brake ratchet 9 , the brake ratchet 9 can be forcibly disengaged from the brake ratchet 4 during the braking process and the retreating process of the driving gear 12 . Since the brake pawl 9 is driven from the brake ratchet 4 by a two-way cylinder, and the ratchet pawl has the characteristic of one-way braking, it does not affect the forward movement of the drive gear 12 . Due to the use of time on-off and test number controllers, the time of power-on and power-off can be set according to needs, and the counting can be automatically completed and the test will be automatically stopped after reaching the set number of tests. The starter motor braking durability test device of the utility model has simple structure and low manufacturing and maintenance costs. The use of the device can completely replace the comprehensive performance test equipment of the starter motor, reduce the time occupied by the comprehensive performance test equipment, and avoid braking durability The damage to the parts of the comprehensive performance test equipment caused by the impact in the test reduces the production cost and improves the production efficiency.

In the present utility model, the driving system can also adopt an electromagnet, that is, the electromagnet replaces the cylinder 10, and the brake pawl 9 is kept disengaged from the brake ratchet 4 by a spring. After the electromagnet is energized, the brake pawl 9 will Conflict with brake ratchet 4.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (6)

1. an actuating motor is braked durability test apparatus, it is characterized in that: comprise brake holder, ratchet shaft, be used for spragging gear, brake ratchet, the braking ratchet that is meshed with the driven wheel of tested actuating motor and control described braking ratchet and described brake ratchet is conflicted or the drive system of throwing off, described ratchet shaft is fixed on the described brake holder, described brake ratchet is connected one and is placed on the described ratchet shaft by bearing with described spragging gear, described braking ratchet is connected with described drive system power.

2. a kind of actuating motor braking durability test apparatus according to claim 1 is characterized in that: also be fixed with the ratchet hinge on the described brake holder, described braking ratchet is placed on the described ratchet hinge and with described ratchet hinge and constitutes revolute pair.

3. a kind of actuating motor braking durability test apparatus according to claim 1, it is characterized in that: described bearing is a deep groove ball bearing.

4. according to any described a kind of actuating motor braking durability test apparatus among the claim 2-3, it is characterized in that: described drive system comprises cylinder, and described braking ratchet is connected with the piston rod power of described cylinder.

5. a kind of actuating motor braking durability test apparatus according to claim 4, it is characterized in that: described cylinder is two-way cylinder.

6. according to any described a kind of actuating motor braking durability test apparatus among the claim 2-3, it is characterized in that: the tip edge of described spragging gear has chamfering.

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