CN217966732U

CN217966732U - Test fixture

Info

Publication number: CN217966732U
Application number: CN202222421384.7U
Authority: CN
Inventors: 梁振发
Original assignee: GAC Toyota Motor Co Ltd
Current assignee: GAC Toyota Motor Co Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-12-06
Anticipated expiration: 2032-09-13

Abstract

The utility model provides a test fixture, the test fixture includes pressure sensor, base and handle, the base is used for installing in the rim, the handle is provided with the mark point, pressure sensor includes the test end, the test end sets up in the handle and keeps away from the handle and the one end of base junction, the base is provided with the rack projection, the handle sets up the recess, the recess inner wall is provided with the annular rack, the rack projection is installed in the recess and meshes with the annular rack, the handle is parallel to the base setting; the testing clamp is arranged on a rim, an operator uses a hammer or other objects to knock a mark point on a handle, the testing end of a pressure sensor collects the knocking force of the operator, the distance from the mark point to the wheel center of the rim can be measured to calculate the input torque of the knocking, the vibration transfer function and the sound transfer function of a vehicle body under the rim torque input can be obtained by dividing the response of vibration and sound in the vehicle by the input torque, and the testing clamp has the advantage of easily measuring the torque fluctuation of an engine.

Description

Test fixture

Technical Field

The utility model relates to a undulant technical field that measures of vehicle moment of torsion, concretely relates to test fixture.

Background

The torque fluctuation is the fluctuation of torque when various working machine transmission shafts appear, and is closely related to factors such as the working capacity, energy consumption, efficiency, operation life and safety performance of power machines, and the measurement of the torque has important significance for the determination and control of transmission shaft load, the strength design of working parts, the selection of prime mover capacity and the like. Generally speaking, the motor outputs up-and-down fluctuation of certain torque due to a mechanical structure and the inertia of a rotor, the torque fluctuation is greatly influenced by factors such as tooth space moment, electromagnetic wave dynamic moment, armature reaction, mechanical process and the like, and the torque fluctuation is particularly difficult to test and has low precision because the factors are caused by the mechanical structure of the motor.

When an automobile runs, the output torque fluctuation of an engine can cause the vibration and noise of an automobile body, the transfer function of an automobile body structure to the torque fluctuation needs to be measured in the development process of the automobile, but the torque fluctuation of the engine is generally uncontrollable and cannot be quantitatively input, and a good solution is not provided in the industry at present.

Therefore, it is necessary to provide a test fixture to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a test fixture aims at solving the technical problem of the undulant measurement difficulty of moment of torsion of engine among the prior art.

The utility model provides a test fixture for auxiliary measurement automobile body vibration transfer function and sound transfer function, test fixture include pressure sensor, base and handle, the base is used for installing in the rim, the handle is provided with the mark point, pressure sensor includes the test end, the test end set up in the handle is kept away from the handle with the one end of base junction, the base is provided with the rack projection, the handle sets up the recess, the recess inner wall is provided with annular rack, the rack projection install in the recess and with annular rack toothing, the handle is on a parallel with the base sets up.

In one embodiment, the handle comprises a connecting end and a semicircular end, the connecting end is provided with a groove, the annular rack is arranged in the groove, the rack convex column is installed in the groove and meshed with the annular rack, the semicircular end is provided with one end far away from the base, and the testing end is arranged at the semicircular end.

In one embodiment, the base is provided with a first mounting hole, the connecting end is provided with a second mounting hole, and the test fixture further comprises a bolt fastener passing through the first mounting hole and the second mounting hole to mount the handle to the base.

In one embodiment, the handle further comprises two connecting arms, one ends of the two connecting arms are respectively connected with the connecting end, the other ends of the two connecting arms are respectively connected with the semicircular end, the two connecting arms are arranged at intervals, and the testing end and the mark point are respectively arranged on the two connecting arms.

In one embodiment, the connecting end comprises a raised sub-part, and a side of the raised sub-part, which is away from the connecting end, is connected to the base.

In one embodiment, a groove is formed in one side of the heightening sub-piece away from the connecting end, the annular rack is arranged in the groove, and the rack convex column is installed in the groove and meshed with the annular rack.

In an embodiment, the base further comprises a limiting hole, the test fixture further comprises a fixing bolt, the rim is provided with a fixing hole, and the fixing bolt penetrates through the limiting hole and the fixing hole to mount the base on the rim.

In an embodiment, the number of the limiting holes is plural, the number of the fixing bolts is plural, and the plurality of fixing bolts, the plurality of limiting holes and the plurality of fixing holes are installed in one-to-one correspondence.

In one embodiment, the limiting hole is a kidney-shaped hole.

In one embodiment, the base is a flat circular plate, and the kidney-shaped holes are arranged along the radial direction of the base.

In the scheme, the test fixture is used for assisting in measuring the vibration transfer function and the sound transfer function of the vehicle body, the test fixture comprises a pressure sensor, a base and a handle, the base is used for being installed on a rim, the handle is provided with a mark point, the pressure sensor comprises a test end, the test end is arranged at one end, far away from the joint of the handle and the base, of the handle, the base is provided with a rack convex column, the handle is provided with a groove, the inner wall of the groove is provided with an annular rack, the rack convex column is installed in the groove and meshed with the annular rack, and the handle is arranged in parallel with the base; specifically, will test fixture installs in su search fox rim, and operating personnel strikes with bobbler or other article on the handle mark point, pressure sensor the dynamics that operating personnel struck is collected to the test end, then measures mark point extremely the input torque that this strikes can be worked out to the distance of rim wheel center, and the response of reuse car internal vibration and sound divides and can obtain the vibration transfer function and the sound transfer function of automobile body under the rim torque input with this input torque, and this utility model has the undulant advantage of the moment of torsion that can easily measure the engine.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of a base according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a handle according to an embodiment of the present invention;

fig. 3 is a sectional view of a handle according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Base seat	22	Semicircular end
2	Handle (CN)	12	First mounting hole
				11	Rack convex column	212	Second mounting hole
211	Groove	24	Connecting arm
				214	Annular rack	213	Heightening sub-piece
21	Connecting terminal	13	Limiting hole

The purpose of the present invention, its functional features and advantages will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, the utility model provides a test fixture for the auxiliary measurement automobile body vibration transfer function and sound transfer function, test fixture includes pressure sensor, base 1 and handle 2, base 1 is used for installing in the rim, handle 2 is provided with the mark point, pressure sensor includes the test end, the test end sets up in handle 2 keeps away from the handle 2 and the one end of base 1 junction, base 1 is provided with rack projection 11, handle 2 sets up recess 211, the inner wall of recess 211 is provided with annular rack 214, rack projection 11 is installed in recess 211 and meshes with annular rack 214, handle 2 sets up in parallel with base 1; specifically, the test fixture is mounted on a rim, an operator uses a hammer or other objects to knock a mark point on the handle 2, the test end of the pressure sensor collects the knocking force of the operator, then the distance from the mark point to the wheel center of the rim can be measured to calculate the knocking input torque, and the vibration transfer function and the sound transfer function of a vehicle body under the condition of rim torque input can be obtained by dividing the knocking input torque by the vibration and sound response in the vehicle.

In the test, the vehicle driveline and test equipment (software and hardware) are integrated. This system has three elements: input-system characteristics-output. The torque of the hammer corresponds to the input, the vehicle transmission system corresponds to the system characteristics, and the vibration and sound in the vehicle correspond to the output. The following table and formula show the details.

	Input the method	System characteristics	Output the output
					Moment of force	Vehicle transmission system	In-vehicle vibration and sound
Time domain	x(t)	h(t)	y(t)
				Frequency domain	X(ω)	H(ω)	Y(ω)

Y(ω)＝X(ω)H(ω)

Where H (t) is the unit impulse response function of the system and H (ω) is the transfer function (frequency response function) of the system. X (ω) and Y (ω) are the Fourier transforms of the signals X (t) and Y (t), respectively.

The output (torque) and output (response of vibration and sound in the vehicle) are measured, and the system characteristics (vehicle transmission system) can be obtained through computer analysis, namely, the vibration transfer function and the sound transfer function.

Referring to fig. 2 and 3, in an embodiment, the handle 2 includes a connection end 21 and a semicircular end 22, the connection end 21 is provided with a groove 211, an annular rack 214 is provided in the groove 211, the rack boss 11 is installed in the groove 211 and engaged with the annular rack 214, the semicircular end 22 is provided with an end away from the base 1, the testing end is provided at the semicircular end 22, the end of the handle 2 away from the base 1 is provided in a semicircular shape, when the testing end is installed, it is possible to prevent an operator from being injured due to the fact that corners of the handle 2 are too sharp, and this embodiment has an advantage of protecting safety of the operator.

Referring to fig. 2 and 3, in an embodiment, the base 1 is provided with a first mounting hole 12, the connecting end 21 is provided with a second mounting hole 212, the test fixture further includes a bolt fastener, the bolt fastener penetrates through the first mounting hole 12 and the second mounting hole 212 to mount the handle 2 on the base 1, and the handle 2 is fixed on the base 1 through the bolt fastener, so that the test fixture is simple to operate and convenient to mount, dismount and replace, and the embodiment has the advantage of being convenient to operate.

Referring to fig. 2 and 3, in an embodiment, the handle 2 further includes two connecting arms 24, one ends of the two connecting arms 24 are respectively connected to the connecting end 21, the other ends of the two connecting arms 24 are respectively connected to the semicircular end 22, the two connecting arms 24 are arranged at intervals, the testing end and the marking point are respectively arranged on the two connecting arms 24, and by arranging the structure, the testing end cannot be hit due to the fact that the marking point is not aligned during operation, so that the testing end is damaged, and the embodiment has the advantage of being capable of protecting the testing end.

Referring to fig. 2 and 3, in an embodiment, the connecting end 21 includes a height increasing sub-element 213, one side of the height increasing sub-element 213, which is far away from the connecting end 21, is connected to the base 1, and the height increasing sub-element 213 is arranged to prevent the bottom end of the handle 2 from directly contacting the base 1, which is inconvenient for the operator to knock, and this embodiment has the advantage of facilitating the knocking action of the operator.

Referring to fig. 1 to 3, in an embodiment, a groove 211 is disposed on a side of the height increasing sub-member 213 away from the connecting end 21, an annular rack 214 is disposed inside the groove 211, and the rack boss 11 is mounted in the groove 211 and meshed with the annular rack 214, so that the matching between the handle 2 and the base 1 can be tighter through the meshing of the racks, thereby facilitating the adjustment of the position of the handle 2 by rotating the handle 2.

Referring to fig. 1, in an embodiment, the base 1 further includes a limiting hole 13, the test fixture further includes a fixing bolt, the rim is provided with a fixing hole, the fixing bolt passes through the limiting hole 13 and the fixing hole to mount the base 1 on the rim, and the base 1 is fixed on the rim through the fixing hole of the rim itself by the fixing bolt.

Referring to fig. 1, in an embodiment, the number of the limiting holes 13 is plural, the number of the fixing holes is plural, the number of the fixing bolts is plural, the fixing bolts are installed in one-to-one correspondence with the limiting holes 13 and the fixing holes, and the base 1 can be installed on the rim more firmly by arranging the limiting holes 13 and the fixing bolts.

Referring to fig. 1, in an embodiment, the limiting hole 13 is a kidney-shaped hole, and the limiting hole 13 is set to be a kidney-shaped hole, so that the situation that the base 1 cannot be mounted on a rim due to inaccurate position of the limiting hole 13 during processing is prevented, and the embodiment has an advantage that the base 1 can be mounted on the rim.

Referring to fig. 1, in an embodiment, the base 1 is a flat circular plate, the kidney-shaped holes are arranged along the radial direction of the base 1, and the flat circular plate can reduce the cost while ensuring the rigidity, and can adjust the installation position in the radial direction of the base 1 during installation.

Above only be the utility model discloses an optional embodiment to do not consequently restrict the utility model discloses a patent range, all be in the utility model discloses a technical idea down, utilize the equivalent structure transform of doing of the contents of description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection scope.

Claims

1. The utility model provides a test fixture for assistant measuring automobile body vibration transfer function and sound transfer function, its characterized in that, including pressure sensor, base and handle, the base is used for installing in the rim, the handle is provided with the mark point, pressure sensor includes the test end, the test end set up in the handle is kept away from the handle with the one end of base junction, the base is provided with the rack projection, the handle sets up the recess, the recess inner wall is provided with annular rack, the rack projection install in the recess and with annular rack meshes, the handle is on a parallel with the base sets up.

2. The test fixture of claim 1, wherein the handle includes a connecting end and a semi-circular end, the groove having the annular rack disposed therein, the rack post mounted in the groove and engaged with the annular rack, the semi-circular end disposed at an end distal from the base, the testing end disposed at the semi-circular end.

3. The test fixture of claim 2, wherein the base is provided with a first mounting hole and the connecting end is provided with a second mounting hole, the test fixture further comprising a bolt fastener that passes through the first and second mounting holes to mount the handle to the base.

4. The test fixture of claim 3, wherein the handle further comprises two connecting arms, one end of each of the two connecting arms is connected to the connecting end, the other end of each of the two connecting arms is connected to the semi-circular end, the two connecting arms are spaced apart from each other, and the test end and the mark point are respectively disposed on the two connecting arms.

5. The test fixture of claim 4, wherein the attachment end includes a raised sub, a side of the raised sub remote from the attachment end being attached to the base.

6. The test fixture of claim 5, wherein a groove is disposed on a side of the heightening sub member away from the connecting end, the annular rack is disposed inside the groove, and the rack boss is mounted in the groove and engaged with the annular rack.

7. The test fixture of claim 1, wherein the base further comprises a limiting hole, the test fixture further comprising a fixing bolt, the rim being provided with a fixing hole, the fixing bolt passing through the limiting hole and the fixing hole to mount the base to the rim.

8. The test fixture of claim 7, wherein the number of the limiting holes is plural, the number of the fixing bolts is plural, and the plural fixing bolts are installed in one-to-one correspondence with the plural limiting holes and the plural fixing holes.

9. The test fixture of claim 8, wherein the retention hole is a kidney-shaped hole.

10. The test fixture of claim 9, wherein the base is a flat circular plate, and the kidney-shaped hole is disposed along a radial direction of the base.