Shear force testing device for polyurethane foaming sealing strip of vehicle loudspeaker

Abstract

The utility model discloses a shearing force testing device for a polyurethane foaming sealing strip of a vehicle loudspeaker, which comprises a fixed bottom plate and a working table fixedly arranged on a displacement testing table, and a loudspeaker positioning assembly is arranged on the upper side of the fixed bottom plate. The loudspeaker positioning assembly is used for positioning a tested vehicle loudspeaker and enabling a polyurethane foaming sealing strip of the tested vehicle loudspeaker to face the side portion, a shearing force seal assembly is installed on a power head of the displacement test bench, and the shearing force seal assembly comprises two clamping plates and a shearing force seal plate clamped between the two clamping plates. A vertical connecting column is arranged in the middle of the upper end of the upper side clamping plate, a tested vehicle loudspeaker can be rapidly and accurately positioned through the loudspeaker positioning assembly, the shearing force seal assembly can accurately move horizontally and ascend and descend under the control of the displacement testing table, shearing force testing is conducted on a polyurethane foaming sealing strip facing the side portion, and the sealing performance of a vehicle is improved. The position of the shear force seal plate can be flexibly adjusted to correspond to loudspeakers of different models.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car loudspeaker test technical field, concretely is a kind of polyurethane foaming sealing strip's shear force testing device of car loudspeaker. BACKGROUND

[0002] At present, loudspeaker is the electric appliance commonly used in car, in order to improve the sealing property of installation and use of loudspeaker, polyurethane foaming sealing strip needs to be installed at the end of loudspeaker, and the shear force of polyurethane foaming sealing strip is required, to prevent failure by being impacted by external force, so polyurethane foaming sealing strip needs to be tested, but there is no suitable professional testing device, so it is difficult to achieve accurate destructive test. UTILITY MODEL CONTENT

[0003] The utility model provides a kind of polyurethane foaming sealing strip's shear force testing device of car loudspeaker, can solve the problem that there is no suitable professional testing device to meet the polyurethane foaming sealing strip shear force test requirement of car loudspeaker.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of polyurethane foaming sealing strip's shear force testing device of car loudspeaker, including fixed base plate, installation fixed in displacement test table's workbench, the upper side of the fixed base plate is equipped with loudspeaker positioning assembly, the loudspeaker positioning assembly is used to position the measured car loudspeaker and make the polyurethane foaming sealing strip of measured car loudspeaker towards side portion, the power head of the displacement test table is equipped with shear force seal stamp assembly, the shear force seal stamp assembly includes two clamps and the shear force seal stamp plate clamped between two clamps, wherein the upper end of the upper clamp is provided with vertical connecting column in the middle, by setting loudspeaker positioning assembly, the measured car loudspeaker can be positioned quickly and accurately, shear force seal stamp assembly can be accurately translated and lifted under the control of displacement test table, the polyurethane foaming sealing strip towards side portion is tested, and shear force seal stamp plate can be flexibly adjusted position, corresponding various different models of loudspeaker.

[0005] As preferred, the loudspeaker positioning assembly includes tail positioning plate installed on the first end of the upper side of the fixed base plate, the tail positioning plate is equipped with positioning table corresponding to the mounting plate of the tail of the measured car loudspeaker side by side, the second end of the upper side of the fixed base plate is symmetrically equipped with support positioning column on both sides, the second end of the upper side of the fixed base plate is equipped with shear force test support block in the middle, the shear force test support block corresponds to polyurethane foaming sealing strip, by tail positioning plate, shear force test support block and support positioning column, the position of measured car loudspeaker and polyurethane foaming sealing strip can be positioned, to improve the accuracy of test.

[0006] As preferred, the upper side of the shear force test support block is provided with a positioning strip-shaped groove which can support and position the polyurethane foam sealing strip.

[0007] As preferred, the support positioning column is installed in the positioning groove on the upper side of the fixed bottom plate, the positioning groove is provided with a long strip-shaped through groove, the support positioning column is connected with the long strip-shaped through groove through fasteners, and the position is adjusted by sliding along the long strip-shaped through groove to correspond to different loudspeakers.

[0008] As preferred, the upper side of the tail positioning plate is provided with a first positioning table and a second positioning table which are installed side by side, the upper side of the first positioning table is provided with a positioning pin, and the upper side of the second positioning table is provided with a positioning hole, and the first positioning table and the second positioning table which are different in structure can prevent error installation of the measured vehicle loudspeaker.

[0009] As preferred, the two clamping plates are connected through connecting screws at the top corners, the shear force seal plate is L-shaped, the horizontal part of the shear force seal plate is inserted between the two clamping plates, and the vertical part of the shear force seal plate is used for contact with the polyurethane foam sealing strip to perform destructive test.

[0010] Compared with the prior art, the shear force seal plate can be flexibly adjusted in position to correspond to various loudspeakers of different models.

[0011] The structure is simple, and the adaptability is good, the loudspeaker positioning assembly can quickly and accurately position the measured vehicle loudspeaker, the shear force seal assembly can accurately translate and lift under the control of the displacement test table, the polyurethane foam sealing strip on the side is subjected to shear force test, and the shear force seal plate can be flexibly adjusted in position to correspond to various loudspeakers of different models. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a perspective view of the utility model;

[0013] Fig. 2 It is a perspective view of the utility model in use.

[0014] Reference signs:

[0015] 1, shear force seal assembly, 11, clamping plate, 12, vertical connecting column, 13, shear force seal plate, 2, fixed bottom plate, 3, tail positioning plate, 4, second positioning table, 5, first positioning table, 6, support positioning column, 7, shear force test support block, 8, positioning strip-shaped groove, 9, positioning groove, A, polyurethane foam sealing strip, B, measured vehicle loudspeaker. DETAILED DESCRIPTION

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] like Figs. 1-2 As shown, this utility model addresses the problem of the lack of suitable professional testing equipment to meet the shear force testing requirements of polyurethane foam sealing strips for loudspeakers. It provides a shear force testing device for polyurethane foam sealing strips of automotive loudspeakers, including a fixed base plate 2, which is fixedly mounted on the worktable of a displacement testing platform. A loudspeaker positioning component is installed on the upper side of the fixed base plate 2. This component positions the automotive loudspeaker B under test and ensures that the polyurethane foam sealing strip A of the loudspeaker B faces to the side. A shear force stamping component 1 is installed on the power head of the displacement testing platform. The shear force stamping component 1 includes two clamping plates 11 and a shear force stamping plate 13 sandwiched between the two clamping plates 11. A vertical connecting column 12 is centrally located at the upper end of the upper clamping plate 11. By using the loudspeaker positioning component, the automotive loudspeaker B under test can be quickly and accurately positioned. The shear force stamping component 1 can accurately translate and move up and down under the control of the displacement testing platform to perform shear force testing on the polyurethane foam sealing strip A facing to the side. The shear force stamping plate 13 can be flexibly adjusted to accommodate various loudspeaker models.

[0018] Specifically, during testing, the speaker B in the vehicle under test is positioned. The movement path of the shear force stamp assembly 1 is first set. The distance between the shear force stamp plate 13 and the polyurethane foam sealing strip A is 1mm. The polyurethane foam sealing strip A must be cut tightly against the shear force stamp plate 13. Care should be taken to prevent the foam from falling off. If cutting is difficult when the bracket is on the mounting tool, mark the foam while the bracket is in the mounting tool, then carefully pull out the bracket, cut the foam (in the marked area), and reinsert the bracket into the mounting tool. Note that the position of the shear force stamp changes when removing and inserting the bracket.

[0019] Test speed: 100 mm / min. The force must be reduced to zero before starting the shear force test. The shear force result is the maximum force when shearing foam.

[0020] Shear force testing is a destructive test, therefore MSA for this characteristic should be prepared differently. This type of validation involves inspecting 20 production parts in a production batch (with nominal values ​​set on the machine), each part must be inspected once, and then considered as one part and inspected 20 times. Equipment deviation (EV) should be determined by multiplying the sample range by a constant ki (depending on the number of tests), and total deviation (TV) should be based on the specification range divided by 6.

[0021] In the embodiment, the loudspeaker positioning assembly comprises a tail positioning plate 3 mounted on the first end of the upper side of the fixed base plate 2, the tail positioning plate 3 is provided with positioning tables corresponding to the mounting plates of the tail of the loudspeaker B in parallel on the upper side of the tail positioning plate 3, the fixed base plate 2 is provided with supporting positioning columns 6 on the second end of the upper side of the fixed base plate 2, the fixed base plate 2 is provided with a shearing force test supporting block 7 in the middle of the second end of the upper side of the fixed base plate 2, the shearing force test supporting block 7 corresponds to the polyurethane foam sealing strip A, the tail positioning plate 3, the shearing force test supporting block 7 and the supporting positioning column 6 can position the loudspeaker B and the polyurethane foam sealing strip A, thereby improving the accuracy of the test.

[0022] In the embodiment, the shearing force test supporting block 7 is provided with a positioning strip-shaped groove 8 on the upper side of the shearing force test supporting block 7, the positioning strip-shaped groove 8 can support and position the polyurethane foam sealing strip A, the supporting positioning column 6 is mounted in the positioning groove 9 on the upper side of the fixed base plate 2, the positioning groove 9 is provided with a long strip-shaped through groove, the supporting positioning column 6 is connected with the long strip-shaped through groove through fasteners, the position of the supporting positioning column 6 can be adjusted by sliding along the long strip-shaped through groove, so as to correspond to different loudspeakers.

[0023] In the embodiment, the tail positioning plate 3 is provided with a first positioning table 5 and a second positioning table 4 in parallel on the upper side of the tail positioning plate 3, the first positioning table 5 is provided with a positioning pin on the upper side of the first positioning table 5, the second positioning table 4 is provided with a positioning hole on the upper side of the second positioning table 4, the first positioning table 5 and the second positioning table 4 are different in structure, and the first positioning table 5 and the second positioning table 4 can prevent error installation of the loudspeaker B.

[0024] In the embodiment, the two clamping plates 11 are connected through connecting screws located at the top corners, the shearing force stamp plate 13 is in L shape, the horizontal part of the shearing force stamp plate 13 is inserted between the two clamping plates 11, and the vertical part of the shearing force stamp plate 13 is used for contact with the polyurethane foam sealing strip A to perform destructive testing.

[0025] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0026] In addition, in the utility model, the description such as "first", "second" and the like is only used for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0027] In the utility model, unless another explicit provision and limitation, the term "connection", "fixing" and the like should do the broad sense understanding, for example, "fixing" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation, unless another explicit limitation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0028] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on the ordinary skill in the art that can be realized, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not in the protection scope required by the utility model.

Claims

1. A shear force testing device for a polyurethane foam sealing strip for an automotive loudspeaker, characterized in that, include: A fixed base plate (2) is installed and fixed on the workbench of the displacement test bench. A speaker positioning component is installed on the upper side of the fixed base plate (2). The speaker positioning component is used to position the vehicle speaker (B) under test and make the polyurethane foam sealing strip (A) of the vehicle speaker (B) face to the side. A shear force stamp component (1) is installed on the power head of the displacement test bench. The shear force stamp component (1) includes two clamping plates (11) and a shear force stamp plate (13) sandwiched between the two clamping plates (11). A vertical connecting column (12) is provided in the center at the upper end of the upper clamping plate (11).

2. The shear force testing device for the polyurethane foam sealing strip of the vehicle speaker according to claim 1, characterized in that: The speaker positioning assembly includes a rear positioning plate (3) installed on the first end of the upper side of the fixed base plate (2). The rear positioning plate (3) has positioning platforms installed side by side, which correspond one-to-one with the mounting plates at the rear of the vehicle speaker (B) under test. Support positioning columns (6) are symmetrically installed on both sides of the second end of the upper side of the fixed base plate (2). A shear force test support block (7) is installed in the center of the second end of the upper side of the fixed base plate (2). The shear force test support block (7) corresponds to the polyurethane foam sealing strip (A).

3. The shear force testing device for the polyurethane foam sealing strip of the vehicle speaker according to claim 2, characterized in that: The upper side of the shear force test support block (7) is provided with a positioning strip groove (8).

4. The shear force testing device for the polyurethane foam sealing strip of the vehicle speaker according to claim 2, characterized in that: The support positioning column (6) is installed in the positioning groove (9) on the upper side of the fixed base plate (2). The positioning groove (9) is provided with a long strip through groove. The support positioning column (6) is connected to the long strip through groove by fasteners.

5. The shear force testing device for the polyurethane foam sealing strip of the vehicle speaker according to claim 2, characterized in that: The tail positioning plate (3) is provided with a first positioning platform (5) and a second positioning platform (4) installed side by side on its upper side. The first positioning platform (5) is provided with a positioning pin on its upper side, and the second positioning platform (4) is provided with a positioning hole on its upper side.

6. The shear force testing device for the polyurethane foam sealing strip of the vehicle speaker according to claim 1, characterized in that: The two clamps (11) are connected by connecting screws located at the top corners. The shearing stamp plate (13) is L-shaped, and its horizontal part is inserted between the two clamps (11).

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