阅读说明：本技术 中间轴齿轮位置度检测方法 (Method for detecting gear position degree of intermediate shaft ) 是由 黄鸿川 张娅 于 2020-12-30 设计创作，主要内容包括：本发明涉及齿轮位置度检测技术领域,具体公开了中间轴齿轮位置度检测方法,以中间轴上最左侧或最右侧的齿轮为基准齿轮,使位移传感器的检测端圆心与基准齿轮的分度圆重合,将定位钢球移动至基准齿轮顶部的齿槽内,记录位移传感器输出的数值为C或对位移传感器进行归零处理；通过驱动机构移动定位钢球至各被测齿轮的齿槽内,并使得其圆心与被测齿轮的分度圆重合,并依次记录位移传感器的读数Ci,得到被测齿轮的位置度dXi＝(Ci-C)*Ri/R0；将位置度dXi与ΦX比较,当dXi＞ΦX时,该被测齿轮重新进行装配。本专利提供的检测方法降低了检测装置的制造成本,且提高位置度检测的准确度。(The invention relates to the technical field of gear position degree detection, and particularly discloses a method for detecting the position degree of a gear of an intermediate shaft, wherein a leftmost or rightmost gear on the intermediate shaft is taken as a reference gear, the circle center of a detection end of a displacement sensor is coincided with a reference circle of the reference gear, a positioning steel ball is moved into a tooth groove at the top of the reference gear, and the numerical value output by the displacement sensor is recorded as C or zero resetting is carried out on the displacement sensor; moving the positioning steel balls to tooth grooves of the gears to be measured through a driving mechanism, enabling the circle centers of the positioning steel balls to be overlapped with reference circles of the gears to be measured, and sequentially recording readings Ci of a displacement sensor to obtain the position degree dXi of the gears to be measured, which is (Ci-C) Ri/R0; and comparing the position degree dXi with phi X, and when dXi is larger than phi X, reassembling the gear to be tested. The detection method provided by the patent reduces the manufacturing cost of the detection device and improves the accuracy of position detection.)

1. The method for detecting the gear position degree of the intermediate shaft is characterized by comprising the following steps: the adopted detection device comprises a rack, wherein a positioning unit and a detection unit are arranged on the rack, the positioning unit is used for supporting an intermediate shaft structure to be detected, the detection unit comprises a positioning steel ball and a displacement sensor, a driving mechanism for driving the positioning steel ball to move along an X axis and a Z axis is arranged on the rack, the displacement sensor is horizontally arranged on the rack, and the detection end of the displacement sensor horizontally faces a reference gear on the intermediate shaft structure to be detected;

the detection method comprises the following steps:

step 1: taking the rotation center of the intermediate shaft as a coordinate zero point, taking the leftmost or rightmost gear on the intermediate shaft as a reference gear, enabling the circle center of the detection end of the displacement sensor to coincide with the reference circle of the reference gear, moving the positioning steel ball into the tooth groove at the top of the reference gear through the driving mechanism, enabling the circle center of the positioning steel ball to coincide with the reference circle of the reference gear, and recording the numerical value output by the displacement sensor as C or carrying out zero return processing on the displacement sensor;

step 2: moving the positioning steel balls to tooth grooves of the gears to be measured through a driving mechanism, enabling the circle centers of the positioning steel balls to be overlapped with the reference circle of the gears to be measured, and sequentially recording the readings Ci, i is 1,2,3 … … n of the displacement sensors, wherein n is the number of the gears to be measured, and obtaining the position degree dXi of the gears to be measured is (Ci-C) Ri/R0, wherein Ri is the reference circle radius of the gears to be measured;

and step 3: and (3) detecting the position degree dXi obtained in the step (2), comparing the position degree dXi with phi X, and reassembling the gear to be tested when dXi is larger than phi X, wherein phi X is a specified maximum position degree tolerance value.

2. The method of detecting a position degree of a counter gear according to claim 1, wherein: the displacement sensor is horizontally connected to the rack in a sliding manner.

3. The method of detecting a position degree of a counter gear according to claim 1, wherein: the displacement sensor is connected with a PLC controller and is connected with a computer through an Ethernet interface.

4. The method of detecting a position degree of a counter gear according to claim 1, wherein: the positioning unit comprises supporting tables arranged on two sides, V-shaped grooves are formed in the supporting tables, and the bottom surfaces of the two V-shaped grooves are located on the same horizontal plane.

5. The countershaft gear positional degree detection method according to claim 4, wherein: the machine frame is also provided with a tip mechanism close to one of the supporting tables.

6. The countershaft gear positional degree detection method according to claim 5, wherein: the driving mechanism comprises a first lead screw pair and a second lead screw pair, the first lead screw pair comprises a first lead screw and a first sliding block, the first lead screw is horizontally arranged above the positioning unit, the second lead screw pair comprises a second lead screw and a second sliding block, the second lead screw is vertically and rotatably connected to the first sliding block, and the positioning steel ball is arranged on the second sliding block.

7. The countershaft gear positional degree detection method according to claim 6, wherein: and an elastic telescopic mechanism is arranged between the positioning steel ball and the second sliding block.

8. The countershaft gear positional degree detection method according to claim 7, wherein: the elastic telescopic mechanism comprises a frame body with an opening at the bottom, a connecting hole is formed in the top of the frame body, the frame body and the second sliding block are fixed through bolts, a spring is fixed inside the frame body, a pin rod is fixed at the bottom of the spring, a cone is arranged at the bottom of the pin rod, and a positioning steel ball is fixed at the bottom of the pin rod.

Technical Field

The invention relates to the technical field of gear position degree detection, in particular to a method for detecting the position degree of an intermediate shaft gear.

Background

The speed changer for the truck is developed by the company, a double-middle-shaft structure is adopted, gears on the middle shafts are left-handed teeth, during assembly, the centers of tooth grooves of all the gears and reference teeth in a measuring position are required to be superposed, and the position deviation is not greater than phi X, so that the uniform stress during working is ensured.

Because the intermediate shaft gear and the shaft are in interference fit, the gear needs to be heated during assembly, the position degree needs to be detected after the assembly is finished, the position degree detection mainly depends on a gear measurement center, the tooth profile is measured according to the principle, and an offset center is found for comparison, so that the traditional measurement mode is long in time consumption.

Disclosure of Invention

The invention provides a method for detecting the position degree of an intermediate shaft gear, which aims to solve the problem of long measuring time in the prior art by measuring tooth profiles and finding out an offset center for comparison.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the detection device comprises a rack, a positioning unit and a detection unit are arranged on the rack, the positioning unit is used for supporting the intermediate shaft structure to be detected, the detection unit comprises a positioning steel ball and a displacement sensor, a driving mechanism for driving the positioning steel ball to move along an X axis and a Z axis is arranged on the rack, the displacement sensor is horizontally arranged on the rack, and the detection end of the displacement sensor horizontally faces a reference gear on the intermediate shaft structure to be detected;

the detection method comprises the following steps:

step 1: taking the rotation center of the intermediate shaft as a coordinate zero point, taking the leftmost or rightmost gear on the intermediate shaft as a reference gear, enabling the circle center of the detection end of the displacement sensor to coincide with the reference circle of the reference gear, moving the positioning steel ball into the tooth groove at the top of the reference gear through the driving mechanism, enabling the circle center of the positioning steel ball to coincide with the reference circle of the reference gear, and recording the numerical value output by the displacement sensor as C or carrying out zero return processing on the displacement sensor;

step 2: moving the positioning steel balls to tooth grooves of the gears to be measured through a driving mechanism, enabling the circle centers of the positioning steel balls to be overlapped with the reference circle of the gears to be measured, and sequentially recording the readings Ci, i is 1,2,3 … … n of the displacement sensors, wherein n is the number of the gears to be measured, and obtaining the position degree dXi of the gears to be measured is (Ci-C) Ri/R0, wherein Ri is the reference circle radius of the gears to be measured;

and step 3: and (3) detecting the position degree dXi obtained in the step (2), comparing the position degree dXi with phi X, and reassembling the gear to be tested when dXi is larger than phi X, wherein phi X is a specified maximum position degree tolerance value.

The technical principle and the effect of the technical scheme are as follows:

only set up a displacement sensor in this scheme, through the cooperation with the location steel ball, through the data of displacement sensor output to calculate through the position degree formula, can accomplish the structural position degree of being surveyed the gear of jackshaft fast and measure, this in-process only need set up a displacement sensor, and displacement sensor need not remove in the course of the work, has reduced detection device's manufacturing cost on the one hand, and on the other hand improves the degree of accuracy that the position degree detected.

Further, the displacement sensor is horizontally connected to the rack in a sliding mode.

Has the advantages that: therefore, when the intermediate shaft structure to be detected is placed into or taken out of the positioning unit, the intermediate shaft structure can be kept away from the intermediate shaft structure through the sliding displacement sensor so as to be convenient to operate.

Furthermore, the displacement sensor is connected with a PLC controller and is connected with a computer through an Ethernet interface.

Has the advantages that: therefore, the calculation speed of the position degree dXi is further improved, and the judgment of the position degree dXi and the maximum position tolerance phi X is quickly finished.

Furthermore, the positioning unit comprises support tables arranged on two sides, V-shaped grooves are formed in the support tables, and the bottom surfaces of the two V-shaped grooves are located on the same horizontal plane.

Has the advantages that: the arrangement can play a good supporting role for the intermediate shaft structure.

Furthermore, a tip mechanism close to one of the supporting tables is arranged on the machine frame.

Has the advantages that: the center mechanism is arranged for adjusting the coincidence of the detection reference and the design reference.

Furthermore, actuating mechanism includes first lead screw pair and second lead screw pair, and first lead screw pair includes first lead screw and first slider, and first lead screw level sets up in the top of positioning unit, and second lead screw pair includes second lead screw and second slider, and the vertical rotation of second lead screw is connected on first slider, and the setting steel ball of location sets up on the second slider.

Has the advantages that: the driving mechanism arranged in this way can realize quick and accurate positioning of the positioning steel ball.

Furthermore, an elastic telescopic mechanism is arranged between the positioning steel ball and the second sliding block.

Has the advantages that: the elastic telescopic mechanism is arranged to ensure that the positioning steel ball can be tangent to two tooth surfaces in the measured gear at the same time, if the elastic telescopic mechanism is not arranged, if the measured gear deflects relatively, the positioning steel ball can enter the tooth groove to be tangent to one of the tooth surfaces possibly, but cannot be tangent to the two tooth surfaces at the same time, and thus, the measured position accuracy is inaccurate.

Furthermore, the elastic telescopic mechanism comprises a frame body with an opening at the bottom, a connecting hole is formed in the top of the frame body, the frame body and the second sliding block are fixed through bolts, a spring is fixed inside the frame body, a pin rod is fixed at the bottom of the spring, a cone is arranged at the bottom of the pin rod, and a positioning steel ball is fixed at the bottom of the pin rod.

Has the advantages that: through pin rod coupling spring and location steel ball, can make better card of location steel ball go into in the tooth's socket, prevent that it from producing great amplitude.

Drawings

FIG. 1 is a schematic diagram of a detection scheme according to an embodiment of the present invention;

FIG. 2 is a front view of a detection device in an embodiment of the present invention;

FIG. 3 is a left side view of a detecting device according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a resiliently flexible structure of a test device used in an embodiment of the invention.

Reference numerals in the drawings of the specification include: the device comprises an intermediate shaft structure 1, a reference gear 2, a measured gear 3, a support table 10, a tip mechanism 11, a positioning steel ball 12, a displacement sensor 13, a first screw pair 14, a second screw pair 15, a frame 16, a bolt 17, a spring 18 and a pin rod 19.

Detailed Description

The following is further detailed by way of specific embodiments:

example 1:

the detection method of the gear position degree of the intermediate shaft adopts a detection device, which is basically as shown in the attached figures 2 and 3: including the frame, be equipped with positioning unit and detecting element in the frame, wherein positioning unit is used for supporting the jackshaft structure 1 who waits to detect, positioning unit is including setting up the supporting bench 10 in the left and right sides respectively in this embodiment, the V-arrangement groove has been seted up on the supporting bench 10, and the bottom surface in two V-arrangement grooves is located same horizontal plane, jackshaft structure 1's both ends can be placed at the V-arrangement inslot, still be equipped with top mechanism 11 that is close to one of them supporting bench 10 in the frame, top mechanism 11 is used for adjusting and detects benchmark and design benchmark coincidence.

The detection unit comprises a positioning steel ball 12 and a displacement sensor 13, wherein a first lead screw pair 14 and a second lead screw pair 15 are arranged on the rack, the first lead screw pair 14 and the second lead screw pair 15 control the X-axis and Z-axis movement of the positioning steel ball 12, the first lead screw pair 14 comprises a first lead screw and a first sliding block, the first lead screw is horizontally arranged above the positioning unit, the second lead screw pair 15 comprises a second lead screw and a second sliding block, the second lead screw is vertically and rotatably connected to the first sliding block, and an elastic telescopic structure is arranged between the positioning steel ball 12 and the second sliding block.

Referring to fig. 4, the elastically telescopic structure in this embodiment includes a frame 16 with an opening at the bottom, a connecting hole is formed at the top of the frame 16, the frame 16 and the second slider are fixed by a bolt 17, a spring 18 is fixed inside the frame 16, a pin 19 is fixed at the bottom of the spring 18, the bottom of the pin 19 is tapered, and the positioning steel ball 12 is fixed at the bottom of the pin 19.

The intermediate shaft structure 1 of this embodiment uses the left side gear as benchmark gear 2, and wherein displacement sensor 13 horizontal sliding connection is in the frame, and its sense terminal level is towards the benchmark tooth, and displacement sensor 13 is connected with the PLC controller in addition to link to each other with the computer through the ethernet interface.

In the present embodiment, in combination with the above-described detection device, the detection principle of the method for detecting the position degree of the counter gear is shown in fig. 1, in which the zero point of coordinates is the rotation center O of the counter shaft, the leftmost (or rightmost) gear is the reference gear 2, the reference gear 2 has a reference circle radius R0 (known), the reference circle radii of the other measured gears 3 are Ri, i is 1,2,3 … … n, n is the number of the measured gears 3, Φ X is the maximum value of the predetermined position degree tolerance, θ i is the rotation angle between the measured gear 3 and the measurement center point of the reference gear 2, and dXi is Ri sin (θ i), and because the rotation angle θ i is small, dXi is Ri (θ i) and Ri θ i … … formula 1.

The method for detecting the gear position degree of the intermediate shaft comprises the following steps:

step 1: taking the rotation center O of the intermediate shaft as a coordinate zero point, taking the leftmost (or rightmost) gear on the intermediate shaft as a reference gear 2, taking the reference gear 2 as a reference circle radius R0 (known), horizontally moving the displacement sensor 13 along the Y axis to enable the detection end to be positioned in the tooth space of the reference gear 2, enabling the circle center of the detection end to be overlapped with the reference circle of the reference gear 2, simultaneously moving the positioning steel ball 12 into the tooth space at the top of the reference gear 2 through the first screw pair 14 and the second screw pair 15 to enable the circle center of the positioning steel ball 12 to be overlapped with the reference circle of the reference gear 2, and enabling the value output by the displacement sensor 13 to be C (zero resetting can also be directly carried out).

Step 2: the rear displacement sensor 13 does not move any more, the positioning steel ball 12 is moved through the first screw pair 14 and the second screw pair 15, so that the positioning steel ball is moved into the tooth slot of the first gear 3 to be measured, and the center of the positioning steel ball coincides with the reference circle of the first gear 3 to be measured, wherein the reference circle radius of the gear 3 to be measured on the intermediate shaft is Ri (known), that is, the reference circle radius of the first gear 3 to be measured is R1, and then the reading of the displacement sensor 13 is recorded (transmitted to a computer through a PLC controller, recorded and operated through the computer) as C1, since only one displacement sensor 13 is arranged in the embodiment, the combination formula 1, (C1-C)/R0 is (rxi/Ri/θ i), and the position degree detection formula dXi (Ci-C) is (Ri/R0 … …) formula 2 is obtained.

The rotation amount (position degree) of the first gear 3 to be measured is dX1 ═ C1-C ═ R1/R0.

By moving the positioning steel ball 12, the rotation amount (position degree) dXi of the gear 3 to be measured is sequentially detected as (Ci-C) × Ri/R0.

And step 3: comparing the position degree dXi detected in the step 2 with phi X, and when dXi is larger than phi X, the tested gear 3 needs to be assembled again.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.