JPH04204236A - Test apparatus for measuring load characteristic of power steering - Google Patents

Test apparatus for measuring load characteristic of power steering

Info

Publication number
JPH04204236A
JPH04204236A JP33786590A JP33786590A JPH04204236A JP H04204236 A JPH04204236 A JP H04204236A JP 33786590 A JP33786590 A JP 33786590A JP 33786590 A JP33786590 A JP 33786590A JP H04204236 A JPH04204236 A JP H04204236A
Authority
JP
Japan
Prior art keywords
ball screw
load
power steering
rack
servo motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP33786590A
Other languages
Japanese (ja)
Inventor
Takuma Takeda
琢磨 武田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Machine Works Ltd
Original Assignee
Sanyo Machine Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Machine Works Ltd filed Critical Sanyo Machine Works Ltd
Priority to JP33786590A priority Critical patent/JPH04204236A/en
Publication of JPH04204236A publication Critical patent/JPH04204236A/en
Pending legal-status Critical Current

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  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

PURPOSE:To make the non-stage setting of a load applied to a rack by providing a ball screw shaft with a powder brakes capable of voltage control as a measure to provide a rack with a load of the stationary swing time. CONSTITUTION:Powder brakes 20, 21 are provided at several one ends of ball screw shafts 22, 23 and servomotors 24, 25 to rotate at constant rotating torque are provided at the other ends. Magnetic particles finely divided are filled in the space between two discs within these powder brakes; the particles congregating when voltage is applied, friction occurs between the two discs; and the frictional force also between the two discs increases in proportion to the applied voltage. The brake force of the ball screw shafts 22, 23 can correctly be controlled to an arbitrary value by controlling the voltage applied to the powder brakes 20, 21 and controlling the friction force between the two discs (illustration omitted).

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、パワーステアリングの負荷特性測定用試験装
置に関し、詳しくは、負荷手段としてサーボモータとパ
ウダーブレーキを使用するパワーステアリングの負荷特
性測定用試験装置に関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a test device for measuring load characteristics of power steering, and more specifically, a test device for measuring load characteristics of power steering that uses a servo motor and a powder brake as load means. This relates to testing equipment.

[従来の技術〕 、 自動車等のパワーステアリングは、製造後で実車組付前
に、所定項目について性能試験を行う。
[Prior Art] Power steering systems for automobiles, etc. are subjected to performance tests on predetermined items after manufacture and before assembly into an actual vehicle.

試験項目の主なものは、無負荷ピニオントルク、ラック
の摺動力、入出力特性、負荷特性、リークの測定、ギヤ
比の測定、ならびに、ワークの外形寸法の測定等である
The main test items are no-load pinion torque, rack sliding force, input/output characteristics, load characteristics, leak measurement, gear ratio measurement, and workpiece external dimensions.

このうち、負荷特性の試験は、据え切りのトルク特性、
即ち、停車時においてステアリングを操舵するのに必要
なトルク特性を検査する目的で行うものである。実際に
は、まず、第2図に示す油圧回路を使用して油圧シリン
ダ(1)(2)の背圧をリリーフ弁(3)(4)で所定
油圧に一定に保持し、上記油圧シリンダ(1)(2)の
ビストンロンド(5)(6)でパワーステアリングの本
体(7)内のラック(8)をクランプして両側から一定
負荷を加え、次に、サーボモータ(9)でビニオン軸(
10)を回転し、この時、サーボモータ(9)の駆動軸
に作用するトルク反力を、トルクトランスジューサ(1
1)で検出することによって行っている。
Among these tests, the load characteristics test includes stationary turning torque characteristics,
That is, this is done for the purpose of testing the torque characteristics necessary for steering the vehicle when the vehicle is stopped. In practice, first, using the hydraulic circuit shown in Fig. 2, the back pressure of the hydraulic cylinders (1) and (2) is kept constant at a predetermined hydraulic pressure using the relief valves (3 and 4), and the back pressure of the hydraulic cylinders ( 1) Clamp the rack (8) inside the power steering body (7) with the viston rondos (5) and (6) of (2), apply a constant load from both sides, and then tighten the pinion shaft with the servo motor (9). (
10), and at this time, the torque reaction force acting on the drive shaft of the servo motor (9) is transferred to the torque transducer (1
This is done by detecting in step 1).

上記油圧回路は、油圧シリンダ(1)(2)のa室の戻
り通路(12)  (13)に、例えば2位置切換弁(
14)  (15) 、リリーフ弁(3)(4)、3位
置切換弁(16)  (17)を順に配置して構成して
おり、負荷特性の試験中は、3位置切換弁(16)(1
7)を中立状態において油圧シリンダ(1)(2)の6
室に油圧を加えると共に、2位置切換弁(14)  (
15)のボート(b)をリリーフ弁(3)(4)に接続
して、リリーフ弁(3)(4)によって、a室を設定油
圧に保持し、この結果、上記本体(7)に一定の負荷を
加えることが可能になる。
The above hydraulic circuit has, for example, a two-position switching valve (
14) (15), relief valves (3) (4), and 3-position switching valves (16) (17) are arranged in this order. During the load characteristic test, the 3-position switching valves (16) ( 1
7) in the neutral state, the hydraulic cylinders (1) and (2) 6
While applying hydraulic pressure to the chamber, the two-position switching valve (14) (
Connect the boat (b) of 15) to the relief valves (3) and (4), and use the relief valves (3) and (4) to maintain the chamber a at the set oil pressure, and as a result, the body (7) has a constant pressure. It becomes possible to add a load of

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述の負荷特性試験を行う時、例えば、乾燥路面での据
え切り特性と、濡れた路面での据え切り性能との両方を
テストする場合、或いは、車種の違いによる車両重量の
差異、本体の大きさの差異を考慮した場合等では、試験
を正確に行うため、本体に加える負荷は、任意に変化可
能でなければならない。しかし、従来の試験装置では、
負荷を加える手段として油圧シリンダー、リリーフ弁等
から成る油圧回路を使用して、リリーフ弁で負荷の設定
を行っているため、該負荷の設定値を容易に、且つ、正
確に任意の値に変化させることは困難である。
When performing the load characteristics test mentioned above, for example, when testing both stationary steering characteristics on a dry road surface and stationary steering performance on a wet road surface, or when testing differences in vehicle weight due to different vehicle types, or the size of the main body, In order to conduct tests accurately, the load applied to the main body must be able to be changed arbitrarily in cases where differences in strength are taken into account. However, with conventional test equipment,
A hydraulic circuit consisting of a hydraulic cylinder, a relief valve, etc. is used as a means of applying a load, and the load is set by the relief valve, so the set value of the load can be easily and accurately changed to any value. It is difficult to do so.

上述の問題点に鑑み、本発明は、負荷の設定値を容易に
且つ正確に任意の値に変化させることの可能なパワース
テアリングの負荷特性測定用試験装置を提供することを
目的とする。
In view of the above-mentioned problems, an object of the present invention is to provide a test device for measuring load characteristics of power steering that can easily and accurately change a load setting value to an arbitrary value.

〔課題を解決するための手段〕[Means to solve the problem]

上述の目的を達成するため、本発明は、パワーステアリ
ングの本体内のラックを両端からクラジブして負荷を加
えると共に、本体のビニオン軸をサーボモータで駆動し
、この時、サーボモータの駆動軸に作用するトルク反力
をトルクトランスジューサで検出するパワーステアリン
グの負荷特性測定用試験装置において、ラックの両端に
接近離隔移動可能に配置した一対のクランプ部材と、−
対のクランプ部材にボールねじナットを介して螺合させ
たボールねし軸と、ボールねし軸を正逆回転駆動するサ
ーボモータと、ボールねし軸に装着した電圧制御可能な
パウダーブレーキとを具備したことを特徴とするもめで
ある。
In order to achieve the above object, the present invention applies a load to the rack in the main body of the power steering from both ends, drives the binion shaft of the main body with a servo motor, and at this time, the drive shaft of the servo motor In a test device for measuring load characteristics of power steering in which acting torque reaction force is detected by a torque transducer, a pair of clamp members disposed at both ends of a rack so as to be movable toward and away from each other;
A ball screw shaft screwed onto a pair of clamp members via a ball screw nut, a servo motor that drives the ball screw shaft in forward and reverse rotation, and a voltage controllable powder brake attached to the ball screw shaft. This is a conflict characterized by the fact that

(作用) 本発明では、サーボモータはクランプ部材をラックの両
端に接近離隔移動させるだけとする。そして、ラックに
据え切り時の負荷を与える手段として、電圧制御可能な
パウダーブレーキを、ボールねし軸に設置しているため
、ラックに加える負荷の無段階設定が可能になり、容易
に且つ正確に任意の負荷を設定することが可能になる。
(Operation) In the present invention, the servo motor only moves the clamp member towards and away from both ends of the rack. As a means of applying a load to the rack during stationary cutting, a voltage-controllable powder brake is installed on the ball screw shaft, making it possible to steplessly set the load applied to the rack, making it easy and accurate. It becomes possible to set any load to .

〔実施例〕〔Example〕

第1図に、本発明に係るパワーステアリングの負荷特性
測定用試験装置を示す。尚、本実施例では従来例と同一
部材には同一番号を付している。
FIG. 1 shows a test device for measuring load characteristics of power steering according to the present invention. In this embodiment, the same members as in the conventional example are given the same numbers.

(20)  (21)は、ボールねじ軸(22)  (
23)の先端に取付けたパウダーブレーキであり、また
上記ボールねじ軸(22)  (23)の他端には一定
の回転トルクで回転するサーボモータ(24)  (2
5)が取付けられている。このパウダーブレーキ(20
)(21)は、対向配置した2枚の円板(図示省略)の
片方をボールねじ軸(22)  (23)に取付け、他
方の円板(図示省略)を固定状態にすると共に、上記2
枚の円板の空間に、細かく分割した磁性粒子を満たした
ものであり、電圧をかけると粒子が集合して2枚の円板
間に摩擦が生じ、また加える電圧に比例して2枚の円板
(図示省略)間の摩擦力も増大するものである。上記パ
ウダーブレーキ(20)  (21)にかける電圧を制
御し、2枚の円板(図示省略)間の摩擦力を制御するこ
とによって、ボールねじ軸(2,2)  (23)のブ
レーキ力を、任意の値に正確に制御することが可能にな
る。
(20) (21) is the ball screw shaft (22) (
A powder brake is attached to the tip of the ball screw shaft (22) (23), and a servo motor (24) (24) that rotates with a constant torque is attached to the other end of the ball screw shaft (22) (23).
5) is installed. This powder brake (20
) (21) is a system in which one of two discs (not shown) arranged opposite to each other is attached to the ball screw shaft (22) (23), the other disc (not shown) is fixed, and the above 2 discs (not shown) are fixed.
The space between two discs is filled with finely divided magnetic particles. When a voltage is applied, the particles aggregate and create friction between the two discs. The frictional force between the disks (not shown) also increases. By controlling the voltage applied to the powder brakes (20) (21) and controlling the frictional force between the two disks (not shown), the braking force of the ball screw shafts (2, 2) (23) can be increased. , it becomes possible to precisely control to any value.

(26)  (27)は、上記ボールねし軸(22) 
 (23)と螺合する永−ルねじナラ) (2B)  
(29)を下方に固定したクランプ部材であり、ボール
ねじ軸(22)  (23)の回転に伴い、ボールねじ
軸(22)(23)と平行に水平移動を行う。上記クラ
ンプ部材(26)  (27)が、上記ラック(8)を
クランプした後は、サーボモータ(24)  (25)
をフリーにすると共に、パウダブレーキ(20)  (
21)に電圧を加え、ボールねじ軸(22)  (23
)の回転を停止させておく。上記クランプ部材(26)
  (27)には、夫々ロードセル(30)  (31
)を介して押圧体(32)  (33)を取付け、後述
するピニオン軸(10)の回転付与手段によりピニオン
軸(lO)を回転させたとき、ラック(8)が移動し、
上記押圧体(32)  (33)を押圧して推力を加え
る。
(26) (27) is the ball screw shaft (22)
(23) and the permanent screw nut) (2B)
(29) is a clamp member fixed downward, and as the ball screw shafts (22) and (23) rotate, it moves horizontally in parallel with the ball screw shafts (22) and (23). After the clamp members (26) (27) clamp the rack (8), the servo motors (24) (25)
In addition to freeing the powder brake (20) (
21), and the ball screw shafts (22) (23
) should stop rotating. The above clamp member (26)
(27) has load cells (30) and (31), respectively.
), and when the pinion shaft (10) is rotated by means of rotation imparting means for the pinion shaft (10), which will be described later, the rack (8) moves,
The pressing bodies (32) and (33) are pressed to apply thrust.

尚、上述の装置において、パウダーブレーキ(20) 
 (21)を装備せず、サーボモータ(24)(25)
のみによって負荷を制御することも可能であるが、この
場合、サーボモータ(24)  (25)の容量は大型
のものが必要となるという間物が生じるため、本発明で
はパウダーブレーキを併用してサーボモータ(24) 
 (25)の小型化を図ると共に、正確な負荷を加える
ことを可能としている。
In addition, in the above-mentioned device, the powder brake (20)
Without (21), servo motor (24) (25)
It is also possible to control the load by using only a powder brake, but in this case, a large capacity servo motor (24) (25) is required, so in the present invention, a powder brake is also used to control the load. Servo motor (24)
This makes it possible to reduce the size of (25) and apply an accurate load.

(10)は、上記ラック(8)と噛合するビニオン(図
示省略)を先端に固着しているピニオン軸であり、更に
、上記ピニオン軸(10)の他端にはセレーション部(
34)が形成されている。また、(35)は、駆動軸(
36)を介したサーボモータ(9)によって回転するソ
ケットであり、負荷特性試験時には、上記セレーション
部(34)に嵌合して、サーボモータ(9)の回転を上
記ピニオン軸(10)に伝達してる。更に、上記駆動軸
(36)には、歪計により駆動軸(36)に加わるトル
ク反力を検出するトルクトランスジューサ(11)が取
付けられている。
(10) is a pinion shaft having a pinion (not shown) fixed to its tip that meshes with the rack (8), and furthermore, the other end of the pinion shaft (10) has a serration portion (
34) is formed. In addition, (35) is the drive shaft (
36) is a socket rotated by a servo motor (9) via a servo motor (9), and during a load characteristic test, it fits into the serration part (34) and transmits the rotation of the servo motor (9) to the pinion shaft (10). I'm doing it. Furthermore, a torque transducer (11) is attached to the drive shaft (36) to detect the torque reaction force applied to the drive shaft (36) using a strain gauge.

上述の装置を用いての負荷特性試験は、先ず、組立の完
成した本体(7)を、係止機構(図示省略)で係止し、
サーボモータ(24)  (25)を駆動してクランプ
部材(26)  (27)でラック(8)の両端をクラ
ンプさせる。この状態でパウダーブレーキ(20)  
(21)への供給電圧を所望負荷に対応する電圧、例え
ばラック(8)に500kgfの負荷がかかるような電
圧に設定し、ブレーキ力を作用させる。次に、ソケッt
−(35)をピニオン軸(10)のセレーション部(3
4)に嵌合した後、サーボモータ(9)を、上記パウダ
ーブレーキ(20)  (21)のブレーキ力に対抗し
て、緩速(例えば、60rpm )で正転方向及び逆転
方向に駆動し、そのときのラック(8)に作用する推力
を上記ロードセル(30)(31)によって検出させ、
同時に、ビニオントルクをトルクトランスジューサ(1
1)で検出させる。これらの検出は、連続検出でもよい
が、一定時間間隔毎の検出値を取り出すサンプリング計
測方式とし、各サンプリング値が設定値範囲内かどうか
をチエツクさせ、良品、不良品を判別させるものである
In the load characteristic test using the above-mentioned device, first, the assembled main body (7) is locked with a locking mechanism (not shown),
The servo motors (24) and (25) are driven to clamp both ends of the rack (8) with the clamp members (26) and (27). Powder brake (20) in this condition
The voltage supplied to (21) is set to a voltage corresponding to a desired load, for example, a voltage at which a load of 500 kgf is applied to rack (8), and a braking force is applied. Next, socket t
- (35) is the serration part (3) of the pinion shaft (10).
4), drive the servo motor (9) in the forward and reverse directions at a slow speed (for example, 60 rpm) against the braking force of the powder brakes (20) and (21), The thrust acting on the rack (8) at that time is detected by the load cells (30) and (31),
At the same time, the pinion torque is transferred to the torque transducer (1
1) Detect it. Although these detections may be continuous detection, a sampling measurement method is used in which detected values are taken out at regular time intervals, and each sampling value is checked to see if it is within a set value range to discriminate between good and defective products.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、サーボモータはクランプ部材怖ラック
の両端に接近離隔移動させるだけでよいため、小容量の
ものでよく、また、ボールねし軸を採用したことによっ
てクランプ部材を軽快日清に移動させることができる。
According to the present invention, since the servo motor only needs to move the clamp member closer to and away from both ends of the rack, a small capacity motor is sufficient, and the use of a ball screw shaft allows the clamp member to be moved easily and easily. It can be moved.

そして、ランクに据え切り時の負荷を与える手段として
電圧制御可能なパウダーブレーキを採用したから、乾燥
路面や濡れた路面、その他の任意の負荷条件をパウダー
ブレーキの電圧制御■によって照段階に設定が可能にな
り、さらに、簡単な操作で正確に任意の負荷が設定可能
となり、この結果、パワーステアリングのランクの負荷
特性を測定する際の作業能率を向上させることができる
And since we have adopted a voltage-controllable powder brake as a means of applying a load to the rank during stationary stopping, dry road surfaces, wet roads, and other arbitrary load conditions can be set to the light stage by controlling the voltage of the powder brake. Furthermore, it becomes possible to accurately set any load with a simple operation, and as a result, work efficiency when measuring the load characteristics of power steering ranks can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明に係るパワーステアリングの負荷特性
測定用試験装置の正面図、第2図は、従来の試験装置の
一部断面正面図である。 (7) 本体、     (8) −ラック(9) サ
ーボモータ、(10)−ピニオン軸、(11)−叫・ル
クトランスジューサ、(20)  (21)−−パウダ
ーブレーキ、(22)  (231−ボールねし軸、(
24)  (25)−−サーボモータ、(26)  (
27L−−クランプ部材、(28)  (29)−・・
ボールねじナット。 r−
FIG. 1 is a front view of a test device for measuring load characteristics of power steering according to the present invention, and FIG. 2 is a partially sectional front view of a conventional test device. (7) Main body, (8) - Rack (9) Servo motor, (10) - Pinion shaft, (11) - Transducer/Lux transducer, (20) (21) - Powder brake, (22) (231 - Ball Screw shaft, (
24) (25) -- Servo motor, (26) (
27L--Clamp member, (28) (29)--
ball screw nut. r-

Claims (1)

【特許請求の範囲】[Claims] (1)パワーステアリングの本体内のラックを両端から
クランプして負荷を加えると共に、本体のピニオン軸を
サーボモータで駆動し、この時、サーボモータの駆動軸
に作用するトルク反力をトルクトランスジューサで検出
するパワーステアリングの負荷特性測定用試験装置にお
いて、 ラックの両端に接近離隔移動可能に配置した一対のクラ
ンプ部材と、 一対のクランプ部材にボールねじナットを介して螺合さ
せたボールねじ軸と、 ボールねじ軸を正逆回転駆動するサーボモータと、 ボールねじ軸に装着した電圧制御可能なパウダーブレー
キとを具備したことを特徴とするパワーステアリングの
負荷特性測定用試験装置。
(1) The rack inside the power steering body is clamped from both ends to apply a load, and the pinion shaft of the body is driven by a servo motor. At this time, the torque reaction force acting on the drive shaft of the servo motor is transmitted by a torque transducer. A test device for measuring load characteristics of power steering to be detected includes: a pair of clamp members disposed at both ends of a rack so as to be movable toward and away from each other; a ball screw shaft screwed into the pair of clamp members via a ball screw nut; A test device for measuring load characteristics of power steering, characterized by comprising a servo motor that drives a ball screw shaft in forward and reverse rotation, and a voltage-controllable powder brake attached to the ball screw shaft.
JP33786590A 1990-11-30 1990-11-30 Test apparatus for measuring load characteristic of power steering Pending JPH04204236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33786590A JPH04204236A (en) 1990-11-30 1990-11-30 Test apparatus for measuring load characteristic of power steering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33786590A JPH04204236A (en) 1990-11-30 1990-11-30 Test apparatus for measuring load characteristic of power steering

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JPH04204236A true JPH04204236A (en) 1992-07-24

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JP33786590A Pending JPH04204236A (en) 1990-11-30 1990-11-30 Test apparatus for measuring load characteristic of power steering

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19622687A1 (en) * 1995-06-08 1996-12-12 Toyota Motor Co Ltd Test bed for vehicle steering system
JPH1045011A (en) * 1996-08-06 1998-02-17 Mitsubishi Motors Corp Power steering test equipment
JP2016223843A (en) * 2015-05-28 2016-12-28 株式会社ジェイテクト Testing apparatus for steering subassemblies
CN109141942A (en) * 2018-09-05 2019-01-04 天津英创汇智汽车技术有限公司 Steering load simulator and steering system test method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19622687A1 (en) * 1995-06-08 1996-12-12 Toyota Motor Co Ltd Test bed for vehicle steering system
US5700951A (en) * 1995-06-08 1997-12-23 Toyota Jidosha Kabushiki Kaisha Testing apparatus of steering system
DE19622687C2 (en) * 1995-06-08 1999-08-05 Toyota Motor Co Ltd Test bench for a steering system
JPH1045011A (en) * 1996-08-06 1998-02-17 Mitsubishi Motors Corp Power steering test equipment
JP2016223843A (en) * 2015-05-28 2016-12-28 株式会社ジェイテクト Testing apparatus for steering subassemblies
CN109141942A (en) * 2018-09-05 2019-01-04 天津英创汇智汽车技术有限公司 Steering load simulator and steering system test method

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