Dynamic torsional fatigue testing device for transmission input shaft

Abstract

The utility model discloses a dynamic torsional fatigue testing device for an input shaft of a transmission, which comprises a base and a support assembly vertically arranged on the base. The test assembly comprises a torsion actuating cylinder, a torque sensor, a universal joint transmission shaft, a bearing seat, an input spline housing, a first input shaft, a middle spline housing, a second input shaft, a tail spline housing and a tailstock flange which are coaxially connected in sequence from front to back; the output end of the torsion actuating cylinder is connected with a torque sensor. According to the utility model, the symmetrical layout is adopted, dynamic torsional fatigue test verification can be simultaneously carried out on the two input shafts, the test is efficient, the input shafts are convenient to install and replace, the structural rigidity is large, and the reliability is high; the torsion actuating cylinder and the torque sensor are used for open-loop control of the torque, the angle and the cycle index, the loading precision is high, and the loading frequency is high; the first input shaft and the second input shaft are structurally ensured to be coaxial and prevented from moving, and the accuracy of a test result is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to test device technical field, concretely relates to a transmission input shaft dynamic torsional fatigue test device. BACKGROUND

[0002] Transmission input shaft as the main force component of transmission, connects engine and transmission in automobile transmission system, is important component of power transmission in automobile transmission system, not only bears alternating load, but also bears various transient impact load, stress is complex and changeable, and is easy to break down fault. At present, each transmission input shaft only carries out static torsional test in transmission assembly to examine yield torque and destruction torque of transmission assembly and input shaft, but, since input shaft bears alternating load and transient impact, therefore, existing static torsional test can not test real destruction torque of input shaft, more cannot verify its fatigue life. In addition, since the structure requirement of input shaft, there is stress concentration position such as spline, oil hole, chamfer in its structure in design, will influence the strength and life of input shaft, and static torsional test also can not completely verify the influence of these positions on the strength and fatigue life of input shaft. Therefore, it is very necessary to carry out input shaft dynamic torsional fatigue test in transmission input shaft research and development test or structure improvement stage, but there is lack of suitable test device in prior art. CONTENT OF UTILITY MODEL

[0003] In view of the deficiency of prior art, the utility model aims at providing a transmission input shaft dynamic torsional fatigue test device to solve the technical problem of lacking test device for dynamic torsional fatigue test in transmission input shaft research and development process in prior art.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme to realize:

[0005] A transmission input shaft dynamic torsional fatigue test device, including base and support assembly vertically arranged on the base, test assembly is arranged on the support assembly, the test assembly includes torsional actuator, torque sensor, universal joint transmission shaft, bearing seat, input spline sleeve, first input shaft, middle spline sleeve, second input shaft, tail spline sleeve and tail seat flange arranged in coaxial connection from front to back in order, and the output end of the torsional actuator is connected with the torque sensor.

[0006] The utility model also has the following technical features:

[0007] Specifically, the torsional actuator is provided with an angle encoder.

[0008] Further, the support assembly comprises a first support, a second support and a third support arranged side by side along the length direction of the base, the torsion actuator is arranged on the first support, the bearing seat is arranged on the second support, and the tail seat flange is arranged on the third support.

[0009] Further, the inner wall of the input spline sleeve is provided with a first inner spline, and the outer wall of the first input shaft close to one end of the input spline sleeve is provided with a first outer spline matched with the first inner spline.

[0010] Further, the inner wall of the intermediate spline sleeve is provided with a second inner spline, the outer wall of the first input shaft close to one end of the intermediate spline sleeve is provided with a second outer spline matched with the second inner spline, and the outer wall of the second input shaft close to one end of the intermediate spline sleeve is provided with a third outer spline matched with the second inner spline.

[0011] Further, the intermediate spline sleeve is further provided with a centering sleeve.

[0012] Further, the input spline sleeve and the tail spline sleeve are respectively provided with a first input shaft positioning bearing and a second input shaft positioning bearing, the first input shaft positioning bearing is sleeved on the first input shaft, and the second input shaft positioning bearing is sleeved on the second input shaft; the side of the first input shaft positioning bearing close to the bearing sleeve is further provided with a first limit snap spring, and the side of the second input shaft positioning bearing close to the tail seat flange is further provided with a second limit snap spring.

[0013] Further, a plurality of installation grooves extending along the width direction of the base are arranged on the base in parallel; the bottoms of the first support, the second support and the third support are all provided with sliding blocks capable of slidingly cooperating with the installation grooves.

[0014] Further, a horizontal displacement adjusting plate can be detachably mounted on the base.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] (1) The utility model adopts symmetrical layout on the structure, can satisfy to carry on dynamic torsional fatigue test verification to two input shafts simultaneously, test efficient, input shaft installation is replaced convenient, structural rigidity is big and reliability is high, utilizes torsion actuator and torque sensor to carry out open loop control of torque, angle and cycle number, and loading precision is high, frequency is fast.

[0017] (2) The utility model guarantees the coaxial of the first input shaft and the second input shaft and prevents the movement to the greatest extent from structure, simultaneously, all adopt small gap cooperation, avoid the input shaft to receive other bending moment, guarantee the accuracy of test result. DRAWINGS

[0018] Fig. 1 is the overall structure schematic view of the utility model;

[0019] Fig. 2 is the sectional view of the utility model;

[0020] Fig. 3 is the local connection schematic view of the utility model.

[0021] The meaning of each reference numeral in the figure is as follows:

[0022] 1-base, 2-support assembly, 3-test assembly, 4-horizontal displacement adjusting plate;11-mounting groove;21-first support, 22-second support, 23-third support;31-torsion actuator cylinder, 32-torque sensor, 33-cardan shaft, 34-bearing seat, 35-input spline sleeve, 36-first input shaft, 37-intermediate spline sleeve, 38-second input shaft, 39-tail spline sleeve, 310-tailstock flange, 311-centering sleeve, 312-first input shaft locating bearing, 313-second input shaft locating bearing, 314-first limit clasp spring, 315-second limit clasp spring.

[0023] The specific content of the utility model is further explained and described in detail in combination with the following embodiments. DETAILED DESCRIPTION

[0024] The following gives the specific embodiments of the utility model, and it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent transformation based on the technical solutions of the present application falls within the protection scope of the utility model.

[0025] The terms "upper", "lower", "front", "rear", "top", "bottom" and the like used in the utility model indicate the orientation or positional relationship only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, "inner", "outer" refers to the inner and outer of the corresponding component contour, and the above terms should not be understood as limiting the utility model.

[0026] In addition, the ordinal numbers "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0027] In this invention, unless otherwise stated, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Unless otherwise specified, all components in this utility model can be purchased from the market.

[0029] Example 1

[0030] Following the above technical solutions, such as Figs. 1 to 3 As shown in the figure, this embodiment provides a dynamic torsional fatigue testing device for a transmission input shaft, including a base 1 and a support assembly 2 vertically mounted on the base 1. A testing assembly 3 is mounted on the support assembly 2. The testing assembly 3 includes a torsional actuation cylinder 31, a torque sensor 32, a universal joint drive shaft 33, a bearing seat 34, an input spline sleeve 35, a first input shaft 36, an intermediate spline sleeve 37, a second input shaft 38, a tail spline sleeve 39, and a tail flange 310, all coaxially connected from front to back.

[0031] In this embodiment, the torsion actuation cylinder 31 is a MAST5000 model, driven hydraulically. A controller is installed inside the torsion actuation cylinder 31. The output end of the torsion actuation cylinder 31 is connected to a torque sensor 32, model Honeywell 2211-10k. The torque sensor 32 monitors the torque during torque application and feeds back the detection result to the torsion actuation cylinder 31. The end of the torque sensor 32 furthest from the torsion actuation cylinder 31 is connected to the universal joint drive shaft 33 via a stop joint. The universal joint drive shaft 33 eliminates the alignment misalignment between the torque sensor 32 and the bearing housing 34, which is beneficial for the installation of the testing device and the protection of the torque sensor 32. The first input shaft 36 and the second input shaft 38 are connected and transmit torque via an intermediate spline sleeve 38.

[0032] As a preferred embodiment, an angle encoder is installed on the torsion cylinder 31, which is used for angle monitoring of the torsion cylinder 31.

[0033] Optionally, the angle encoder model is TRD-GN.

[0034] As a preferred scheme of the embodiment, the support assembly 2 comprises a first support 21, a second support 22 and a third support 23 arranged side by side along the length direction of the base 1, the torsion actuator 31 is arranged on the first support 21, the bearing seat 34 is arranged on the second support 22, and the tail seat flange 310 is arranged on the third support 23.

[0035] As a preferred scheme of the embodiment, the inner wall of the input spline sleeve 35 is provided with a first inner spline, and the outer wall of the first input shaft 36 close to one end of the input spline sleeve 35 is provided with a first outer spline matched with the first inner spline.

[0036] As a preferred scheme of the embodiment, the inner wall of the intermediate spline sleeve 37 is provided with a second inner spline, the outer wall of the first input shaft 36 close to one end of the intermediate spline sleeve 37 is provided with a second outer spline matched with the second inner spline, and the outer wall of the second input shaft 38 close to one end of the intermediate spline sleeve 37 is provided with a third outer spline matched with the second inner spline.

[0037] As a preferred scheme of the embodiment, the intermediate spline sleeve 37 is further provided with a centering sleeve 311, which is used to ensure the coaxial connection of the first input shaft 36 and the second input shaft 38.

[0038] As a preferred scheme of the embodiment, the input spline sleeve 35 and the tail spline sleeve 39 are respectively provided with a first input shaft positioning bearing 312 and a second input shaft positioning bearing 313, the first input shaft positioning bearing 312 is sleeved on the first input shaft 36, and the second input shaft positioning bearing 313 is sleeved on the second input shaft 38; the first input shaft positioning bearing 312 is further provided with a first limit snap spring 314 on the side close to the bearing seat 34, and the second input shaft positioning bearing 313 is further provided with a second limit snap spring 315 on the side close to the tail seat flange 310.

[0039] As a preferred scheme of the embodiment, a plurality of installation grooves 11 extending along the width direction of the base 1 are arranged on the base 1 in parallel; the first support 21, the second support 22 and the third support 23 are all provided with a sliding block capable of slidingly cooperating with the installation grooves 11.

[0040] As a preferred scheme of the embodiment, the base 1 is further detachably provided with a horizontal displacement adjusting plate 4, and the base 1 can be made of iron with good rigidity.

[0041] The utility model discloses a torsion actuator cylinder 31, torque sensor 32, universal joint transmission shaft 33 and bearing seat 34 coaxial connection is first in assembling, then the input spline sleeve 35 is installed at the one end of bearing seat 34, then the first input shaft 36 and second input shaft 38 are installed together with the intermediate spline sleeve 37 by the aid of centering sleeve 311, the spline sleeve of the other end of first input shaft 38 is sleeved into input spline sleeve 35, in the process of sleeving, the shaft head of first input shaft 36 is in the inner ring of first input shaft locating bearing 312, and first input shaft is pushed to the position by the aid of first limit clasp spring 314, the tail spline sleeve of connecting to tailstock is sleeved into the other end of second input shaft 38, similarly, the shaft head of second input shaft 38 is in the inner ring of second input shaft locating bearing 313, and third support 23 is pushed to the position by the aid of second limit clasp spring 315, the horizontal displacement fine adjustment is carried out using horizontal displacement adjusting plate 4, the coaxial and unbending of first input shaft 36 and second input shaft 38 are guaranteed, finally, the support assembly is fastened by the aid of T type bolt.

[0042] The utility model discloses a test, set up the control mode of torsion actuator cylinder 31, loading frequency and control torque, then according to the test time setting of the dismounting and inspection cycle number, start the test after, utilize torque sensor 32 monitoring and gathering alternating cyclic load and load number, when testing to the time of setting, test device automatic shutdown, and the test personnel carry out dismounting and inspection, continue to carry out cyclic test after dismounting and inspection are correct.

[0043] During the test, the angle encoder installed at the tail of the torsion actuator cylinder 31 can monitor the torsion angle of the torsion actuator cylinder 31 in real time. When the first input shaft 36 or the second input shaft 38 appears torsion abnormality, the torsion angle of the torsion actuator cylinder 31 becomes larger. The test personnel can monitor the torsion state of the first input shaft 36 or the second input shaft 38 through the torsion angle monitoring value of the torsion actuator cylinder 31 and the torque signal sent by the torque sensor 32. After multiple repeated tests, the dynamic torsion fatigue life of the first input shaft 36 and the second input shaft 38 can be measured.

[0044] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0045] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the present disclosure.

[0046] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A dynamic torsional fatigue testing device for a transmission input shaft, comprising a base (1) and a support assembly (2) vertically mounted on the base (1), characterized in that, The support assembly (2) is equipped with a test assembly (3), which includes a torsion cylinder (31), a torque sensor (32), a universal joint drive shaft (33), a bearing seat (34), an input spline sleeve (35), a first input shaft (36), an intermediate spline sleeve (37), a second input shaft (38), a tail spline sleeve (39), and a tail flange (310).

2. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, An angle encoder is installed on the torsion cylinder (31).

3. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, The bracket assembly (2) includes a first bracket (21), a second bracket (22) and a third bracket (23) arranged side by side along the length of the base (1). The torsional actuation cylinder (31) is mounted on the first bracket (21), the bearing seat (34) is mounted on the second bracket (22), and the tail flange (310) is mounted on the third bracket (23).

4. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, The inner wall of the input spline sleeve (35) is provided with a first internal spline, and the outer wall of the first input shaft (36) near the end of the input spline sleeve (35) is provided with a first external spline that matches the first internal spline.

5. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 3, characterized in that, The inner wall of the intermediate spline sleeve (37) is provided with a second internal spline, the outer wall of the first input shaft (36) near the end of the intermediate spline sleeve (37) is provided with a second external spline that matches the second internal spline, and the outer wall of the second input shaft (38) near the end of the intermediate spline sleeve (37) is provided with a third external spline that matches the second internal spline.

6. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, A centering sleeve (311) is also provided inside the intermediate spline sleeve (37).

7. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, The input spline sleeve (35) and the tail spline sleeve (39) are respectively provided with a first input shaft positioning bearing (312) and a second input shaft positioning bearing (313). The first input shaft positioning bearing (312) is sleeved on the first input shaft (36), and the second input shaft positioning bearing (313) is sleeved on the second input shaft (38). The first input shaft positioning bearing (312) is also provided with a first limiting snap ring (314) on the side near the bearing seat (34), and the second input shaft positioning bearing (313) is also provided with a second limiting snap ring (315) on the side near the tail flange (310).

8. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 3, characterized in that, The base (1) has multiple mounting slots (11) extending in parallel along its width direction; the bottom of the first bracket (21), the second bracket (22) and the third bracket (23) are all provided with sliders that can slide and engage with the mounting slots (11).

9. The dynamic torsional fatigue testing device for the transmission input shaft as described in claim 1, characterized in that, A horizontal displacement adjustment plate (4) can also be detachably installed on the base (1).

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