Universal loading device for steering engine

Abstract

The invention discloses a universal loading device for a steering engine, and relates to the technical field of measurement and control, and the universal loading device comprises a bottom plate, one side of the bottom plate is provided with a steering engine installation seat, the bottom plate is provided with a rotatable turntable, the turntable is used for being connected with a tested steering engine through a torque sensor, and the periphery of the turntable is fastened with a steel wire rope; the spring seat is arranged on the bottom plate, a movable rod is arranged in the spring seat in a penetrating mode, a spring arranged on the movable rod in a sleeving mode is arranged in the spring seat, the two ends of the movable rod are located outside the spring seat, one end of the movable rod is connected with the steel wire rope, one end of the movable rod is further connected with a grating ruler, and the other end of the movable rod is connected with the linear sliding rail; the universal steering engine loading device is used for solving the problems that a loading device cannot adapt to steering engines of different sizes, the loading torque is not easy to adjust, and the steering engine rotation angle is inconvenient to observe.

Description

Technical Field

[0001] The present invention belongs to the field of measurement and control technology, and more specifically, relates to a universal loading device for a steering gear. Background Art

[0002] A servo is a position (angle) servo drive, suitable for control systems that require the angle to be continuously changed and maintained.

[0003] The traditional servo loading device is set for a certain model of servo and cannot meet the needs of multiple models; secondly, the loading torque value of the servo is also fixed, and the torque cannot be adjusted conveniently and quickly; finally, the angle indication structure is relatively complicated during the loading process, making it difficult to observe the corresponding data results in real time, and it is impossible to carry out large-scale rapid testing. Summary of the invention

[0004] The purpose of the present invention is to provide a universal loading device for a servo, in view of the deficiencies in the prior art, which is used to solve the problems that the loading device cannot adapt to servos of different sizes, the loading torque is difficult to adjust, and the servo angle is inconvenient to observe.

[0005] In order to achieve the above object, the present invention provides a universal loading device for a steering gear, comprising:

[0006] A bottom plate, one side of which is provided with a steering gear mounting seat, a rotatable turntable is provided on the bottom plate, the turntable is used to connect with the steering gear to be tested through a torque sensor, and a steel wire rope is fastened to the outer periphery of the turntable;

[0007] A spring seat is arranged on the base plate, a movable movable rod is arranged through the spring seat, a spring is arranged in the spring seat and is sleeved on the movable rod, two ends of the movable rod are located outside the spring seat, one end of the movable rod is connected to the wire rope, one end of the movable rod is also connected to a grating ruler, and the other end of the movable rod is connected to a linear slide rail.

[0008] Optionally, a accommodating cavity is provided in the spring seat, the accommodating cavity is communicated with the outer side of one end of the spring seat, one end of the spring seat is threadedly connected to a limiting nut, and the limiting nut can limit the spring in the accommodating cavity.

[0009] Optionally, a first linear bearing and a second linear bearing are respectively provided at both ends of the spring seat, the other end of the spring seat is connected to the movable rod through the first linear bearing, and the movable rod is connected to the linear slide rail through the second linear bearing.

[0010] Optionally, the output shaft of the tested steering gear is connected to the torque sensor via an adapter.

[0011] Optionally, the turntable is arranged on a support seat via a rolling bearing, and the turntable is connected to an encoder.

[0012] Optionally, forward and reverse screw adjustment mechanisms are respectively provided on the steel wire ropes located on the upper and lower sides of the turntable.

[0013] Optionally, a guide wheel seat is further provided on the bottom plate, and two guide rails are vertically provided on the guide wheel seat, and the steel wire rope passes between the two guide rails and is connected to the movable rod.

[0014] Optionally, two ends of the grating ruler are respectively connected to the guide wheel seat and the spring seat, and a scanning terminal of the grating ruler is connected to one end of the movable rod.

[0015] Optionally, a protective cover is provided on the bottom plate.

[0016] Optionally, the spring is made of 65Mn spring steel.

[0017] The present invention provides a universal loading device for a steering gear, which has the following beneficial effects:

[0018] 1. In the universal loading device, the servo and the servo mounting seat are detachably connected, and the spring is limited in the accommodating cavity of the spring seat by the limit nut. When it is necessary to replace a different servo and spring, it is only necessary to disconnect the adapter and the servo to remove the servo from the servo mounting seat, and the spring can be replaced by removing the limit nut from the spring seat;

[0019] 2. In the universal loading device, when different types of servos need to be tested, different servo mounting seats and adapters need to be replaced, which can improve the versatility of the universal loading device;

[0020] 3. In the universal loading device, springs with different elastic force values ​​are placed in the spring seat. The springs are connected to the movable rod and move synchronously. When the wire rope pulls the movable rod, the springs can give different elastic forces to achieve dynamic adjustment of different loading torque coefficients, meeting the needs of loading different torques on the servo.

[0021] 4. The universal loading device adopts a modular and open structure design, which is convenient for disassembly, observation, replacement and maintenance.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0024] Figure 1 A schematic structural diagram of a universal loading device for a steering gear according to an embodiment of the present invention is shown.

[0025] Figure 2 Shows Figure 1 Top view of the .

[0026] Description of reference numerals:

[0027] 1. Support seat; 2. Turntable; 3. Encoder; 4. Wire rope; 5. Guide wheel; 6. Guide wheel seat; 7. Grating scale; 8. Movable rod; 9. Spring seat; 10. Second linear bearing; 11. Linear guide; 12. Measured servo; 13. Torque sensor; 14. Spring; 15. Limit nut; 16. Protective cover. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0029] The present invention provides a universal loading device for a steering gear, comprising:

[0030] A bottom plate, one side of which is provided with a steering gear mounting seat, a rotatable turntable is provided on the bottom plate, the turntable is used to connect with the steering gear to be tested through a torque sensor, and a steel wire rope is fastened to the outer periphery of the turntable;

[0031] A spring seat is arranged on the base plate, a movable active rod is arranged through the spring seat, a spring is arranged in the spring seat and is sleeved on the active rod, two ends of the active rod are located outside the spring seat, one end of the active rod is connected to the wire rope, one end of the active rod is also connected to the grating ruler, and the other end of the active rod is connected to the linear slide rail.

[0032] Specifically, the loading device includes a base plate and a servo mounting seat, the servo mounting seat is arranged on the side of one end of the base plate, and a turntable is arranged at one end of the servo mounting seat. A steel wire rope is tightly fixed on the turntable. Driven by the servo, the turntable can be rotated, thereby driving the steel wire rope on the upper or lower side of the turntable to pull the movable rod. A spring is arranged between the middle part of the movable rod and the spring seat. Since the spring limits the movement of the movable rod in the spring seat, the spring applies its own elastic force to the movable rod, thereby applying a torque to the servo under test.

[0033] Optionally, a accommodating cavity is provided in the spring seat, the accommodating cavity is communicated with the outer side of one end of the spring seat, one end of the spring seat is threadedly connected with a limiting nut, and the limiting nut can limit the spring in the accommodating cavity.

[0034] Specifically, a accommodating cavity for placing the spring is provided in the spring seat. When springs with different elastic forces are installed in the accommodating cavity, the spring and the movable rod are relatively fixed, and the spring limits the movement of the movable rod in the spring seat. When different torques need to be loaded on the servo, the limit nut can be removed from the spring seat, and then the extended part of the movable rod can be disconnected from the movable rod, so that the spring can be separated from the movable rod and the spring that needs to be loaded with the torque coefficient can be replaced.

[0035] Optionally, a first linear bearing and a second linear bearing are respectively provided at both ends of the spring seat, the other end of the spring seat is connected to the movable rod through the first linear bearing, and the movable rod is connected to the linear slide rail through the second linear bearing.

[0036] Specifically, the spring seat is connected to the movable rod through a first linear bearing, so that the movable rod can slide smoothly in the spring seat, which makes it convenient for the movable rod to be pulled by the wire rope; at one end of the movable rod connected to the linear guide rail, the movable rod and the extended part of the movable rod are connected to the linear guide rail through a second axial bearing. When the movable rod is pulled by the wire rope again, the movable rod and the linear guide rail can slide relative to each other, and the linear guide rail will not bring resistance to the movement of the movable rod. When the spring needs to be replaced, the movable rod can be disconnected from its extended part, and the linear guide rail can abut against the end ball of the extended part of the movable rod, so that the linear guide rail can drive the extended part of the movable rod to move away from the spring seat, so that the spring can be separated from the movable rod, which is convenient for replacing springs with different loading torque coefficients.

[0037] Optionally, the output shaft of the tested servo is connected to the torque sensor via an adapter.

[0038] Specifically, the servo under test is connected to the torque sensor via an adapter, and the servo under test can be replaced by simply separating the adapter from the servo.

[0039] Optionally, the turntable is arranged on the support seat via a rolling bearing, and the turntable is connected to the encoder.

[0040] Specifically, the encoder can convert the angular displacement of the turntable into an electrical signal, and transmit and store the electrical signal.

[0041] Optionally, forward and reverse screw adjustment mechanisms are respectively provided on the steel wire ropes located on the upper side and the lower side of the turntable.

[0042] Specifically, the forward and reverse screw adjustment mechanism can adjust the tension of the wire rope on the upper and lower sides of the turntable. Before the servo needs to be loaded and tested, the wire rope needs to be adjusted to a taut state so that the loading torque of the spring can be fully applied to the turntable; when the spring needs to be replaced, the wire rope is adjusted to a relaxed state to prevent the movable rod from being separated from the spring seat when the movable rod is disconnected from the extended part.

[0043] Optionally, a guide wheel seat is also provided on the bottom plate, and two guide rails are vertically provided on the guide wheel seat, and the wire rope passes between the two guide rails and is connected to the movable rod.

[0044] Specifically, the guide wheel seat and the guide wheel cooperate with each other to change the pulling direction of the steel wire ropes on the upper and lower sides of the turntable, merge them into one direction and connect them with a movable rod, and limit the movement direction of the steel wire ropes. According to the characteristics of the steering gear's rotation angle and rotation range, there is no need to use two movable rods to load torque on the steering gear in two directions respectively.

[0045] Optionally, two ends of the grating ruler are respectively connected to the guide wheel seat and the spring seat, and the scanning terminal of the grating ruler is connected to one end of the movable rod.

[0046] Specifically, the distance that the movable rod moves on the spring seat can be used to calculate the compression distance of the spring by the movable rod, which facilitates the testing of the servo.

[0047] Optionally, a protective cover is provided on the bottom plate.

[0048] Optionally, the material of the spring is 65Mn spring steel.

[0049] Specifically, when the servo is subjected to a loading torque test, a protective cover is installed on the outside of the base plate to prevent the device from breaking, thereby providing safety protection for the test personnel. In the loading device, the guide wheel seat and the spring seat are made of stainless steel, the spring is made of 65Mn spring steel, and the remaining structural parts are made of aluminum alloy, thereby increasing the strength of the loading device.

[0050] Example

[0051] like Figure 1 to Figure 2As shown, the present invention provides a universal loading device for a steering gear. Before a loading test is performed on the steering gear, the tested steering gear 12 is first installed on a steering gear mounting seat, and the tested steering gear 12 is connected to a torque sensor 13 through an adapter. The torque sensor 13 is connected to a turntable 2, and the turntable 2 is rotatably arranged on a support seat 1. The turntable 2 is also connected to an encoder 3 for recording the rotation angle data of the steering gear. In addition, a spring 14 with a required loading torque coefficient is installed in a spring seat 9, and a limit nut 15 is used to limit the spring 14 in the spring seat 9, so that the spring 9 can apply an elastic force to the movable rod 8 to prevent the movable rod 8 from being pulled and moved by the wire rope 4; when the steering gear is loaded During the test, the servo 12 under test drives the turntable 2 to rotate, so that the wire rope 4 fixed on the turntable 2 pulls the movable rod 8. When the movable rod 8 moves, the grating ruler 7 can detect the compression distance of the movable rod 8 on the spring 14. The movable rod 8 is also provided with a first linear bearing and a second linear bearing 10, so that the friction of the linear guide 11 and the spring seat 9 on the movable rod 8 can be reduced; when the spring 14 needs to be replaced, the limit nut 15 on the spring seat 9 can be removed, and then the movable rod 8 can be disconnected from the extended part, and then the extended part can be moved away from the spring seat 9 through the linear guide 11, so that the spring 14 can be taken out from the spring seat and replaced with other springs of elastic force.

[0052] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A universal loading device for a steering gear, characterized in that: include: A bottom plate, one side of which is provided with a steering gear mounting seat, a rotatable turntable is provided on the bottom plate, the turntable is used to connect with the steering gear to be tested through a torque sensor, and a steel wire rope is fastened to the outer periphery of the turntable; A spring seat is arranged on the base plate, a movable movable rod is arranged through the spring seat, a spring is arranged in the spring seat and is sleeved on the movable rod, two ends of the movable rod are located outside the spring seat, one end of the movable rod is connected to the wire rope, one end of the movable rod is also connected to a grating ruler, and the other end of the movable rod is connected to a linear slide rail.

2. The universal loading device for steering gear according to claim 1, characterized in that: The spring seat is provided with a receiving cavity, the receiving cavity is communicated with the outer side of one end of the spring seat, one end of the spring seat is threadedly connected with a limiting nut, and the limiting nut can limit the spring in the receiving cavity.

3. The universal loading device for steering gear according to claim 2, characterized in that: A first linear bearing and a second linear bearing are respectively disposed at both ends of the spring seat, the other end of the spring seat is connected to the movable rod through the first linear bearing, and the movable rod is connected to the linear slide rail through the second linear bearing.

4. The universal loading device for steering gear according to claim 1, characterized in that: The output shaft of the tested steering gear is connected to the torque sensor through an adapter.

5. The universal loading device for steering gear according to claim 1, characterized in that: The turntable is arranged on a support seat via a rolling bearing, and the turntable is connected to an encoder.

6. The universal loading device for steering gear according to claim 1, characterized in that: The steel wire ropes located on the upper side and the lower side of the rotating disk are respectively provided with forward and reverse screw adjustment mechanisms.

7. The universal loading device for steering gear according to claim 1, characterized in that: The bottom plate is also provided with a guide wheel seat, on which two guide rails are vertically provided, and the steel wire rope passes between the two guide rails and is connected to the movable rod.

8. The universal loading device for steering gear according to claim 7, characterized in that: The two ends of the grating ruler are respectively connected to the guide wheel seat and the spring seat, and the scanning terminal of the grating ruler is connected to one end of the movable rod.

9. The universal loading device for steering gear according to claim 1, characterized in that: A protective cover is arranged on the bottom plate.

10. The universal loading device for steering gear according to claim 1, characterized in that: The material of the spring is 65Mn spring steel.

Images