Engineering plastic retainer bending breaking force inspection fixture

Abstract

The utility model relates to an engineering plastic retainer bending breaking force inspection fixture, which comprises an upper clamping petal and a lower clamping petal, the upper clamping petal is of a single-side claw structure, and the lower clamping petal is of a symmetrical double-side claw structure. The claw part of the upper clamping petal and the claw part on one side of the lower clamping petal are positioned on the same side, and the claw part on the other side of the lower clamping petal is positioned on the other side; the retainer is clamped through a single-side claw of the upper clamping petal and a double-side claw of the lower clamping petal; through the adjustable movable vertical plates of the upper clamping petal and the lower clamping petal, the distance between the vertical plates of the fixture is adjusted according to the size of the retainer when the bending breaking force of the retainer is detected, so that the test requirements of the retainers with different specifications and models are met, and the generalization of the fixture is realized; bending breaking force inspection of retainers of different specifications and models can be completed only by using one fixture, and the technical problems of various models, high manufacturing cost, tedious management, low operation efficiency and the like of fixtures in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to a bending fracture force testing fixture for an engineering plastic retainer, belonging to the technical field of testing devices for engineering plastic retainers. Background Art

[0002] The bending fracture force test of engineering plastic cages for tapered roller bearings is carried out by using a universal testing machine and a special fixture. The cage is placed on the fixture and a compressive load is applied to the cage until it breaks. The maximum force at the time of fracture is the bending fracture force of the cage.

[0003] At present, the bending fracture force test fixture structure is as shown in the attached Figure 1 As shown. The fixture consists of two petals, the upper petal is a steel part with an L-shaped cross section, and the lower petal is a steel part with a U-shaped cross section. The upper petal is installed under the crossbeam of the universal testing machine, and the lower petal is installed at the bottom of the testing machine. The retaining frame is placed upright on the lower petal and remains motionless. During the test, the upper petal moves downward driven by the crossbeam of the testing machine, applying a compressive load to the retaining frame until it breaks. The maximum force at the time of fracture is the bending fracture force of the retaining frame. According to the inspection standard requirements, there should be a gap of 0.5 to 2 mm between the U-shaped groove of the lower petal and the retaining frame (such as Figure 2 Therefore, when designing the fixture, the width of the U-shaped groove should be 0.5 to 2 mm larger than the width of the retaining frame.

[0004] This fixture has a simple structure and is easy to process, but a pair of fixtures is required for each specification and model of cage. Due to the wide variety of cage specifications and models, cage manufacturers need to be equipped with a large number of inspection fixtures of various specifications and models, which not only has high production costs, but also requires a large space for fixture storage, and is cumbersome to manage, troublesome to test, and requires frequent replacement of fixtures, resulting in low operating efficiency. Utility Model Content

[0005] The utility model provides a bending fracture force testing fixture for an engineering plastic retainer to solve the technical problems of the prior art such as various types of fixtures, high production cost, complicated management and low operating efficiency. The fixture is universal and can be used for tapered roller bearings. Only one pair of fixtures is needed to complete the bending fracture force testing of retainers of various specifications and models.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a bending fracture force testing fixture for an engineering plastic retainer, comprising: an upper clamping flap and a lower clamping flap; the upper clamping flap is a single-side claw structure, and the lower clamping flap is a symmetrical double-side claw structure; the claw of the upper clamping flap and the claw on one side of the lower clamping flap are located on the same side, and the claw on the other side of the lower clamping flap is located on the other side; the retainer is clamped by the single-side claw of the upper clamping flap and the double-side claws of the lower clamping flap;

[0007] Furthermore, the upper clamping flap includes a horizontal fixing portion and a movable vertical claw portion, and the vertical claw portion is axially movable relative to the horizontal fixing portion through an adjustment assembly;

[0008] Furthermore, the horizontal fixing part is an upper flap main board, and the vertical claw part includes: an upper flap vertical plate, a fixing plate, and a fixing plate connecting screw, and the adjusting assembly includes an adjusting screw, an adjusting plate, and an adjusting plate connecting screw; a T-slot is provided on one side of the upper flap main board where the vertical claw part is provided, and the upper flap vertical plate is provided with a T-shaped structure matching the T-slot of the upper flap main board, and the upper flap vertical plate is connected to the upper flap main board through the T-slot; a fixing plate is provided on the outer side of the upper flap vertical plate, and two screw holes arranged up and down are provided at the lower part of the fixing plate corresponding to the lower part of the upper flap vertical plate, and the fixing plate is connected to the upper flap vertical plate through the fixing plate connecting screw passing through the screw hole; the adjusting plate has an L-shaped cross-section, and the adjusting plate is connected to the upper flap main board through the adjusting plate connecting screw; the adjusting screw is threadedly connected to the adjusting plate;

[0009] Furthermore, the adjusting screw is connected with the upper end of the vertical claw; a groove is provided at the contact position between the upper clamping flap vertical plate and the adjusting screw head, the adjusting screw head is embedded in the groove and matched with it, and a U-shaped portion is provided on the upper part of the fixed plate to match with the middle connecting shaft of the adjusting screw; the fixing plate and the upper clamping flap vertical plate are connected and matched into one body through the adjusting screw;

[0010] Furthermore, a connecting pin hole is provided in the middle of the upper flap main board, and an upper flap connecting pin is provided in the connecting pin hole, one end of the upper flap connecting pin is connected to the upper flap main board, and the other end is connected to the testing machine;

[0011] When the upper clamping flap is in use, the adjusting screw is rotated in positive and negative phases to drive the upper clamping flap vertical plate to move axially along the T-slot of the upper clamping flap main board; thereby adjusting the vertical claw of the upper clamping flap to the required position.

[0012] Furthermore, the lower clamping flap includes a horizontal fixing portion and movable vertical claw portions located on both sides of the horizontal fixing portion, and the vertical claw portions on each side are axially movable relative to the horizontal fixing portion through an adjustment assembly;

[0013] Furthermore, the horizontal fixing part is a lower card flap main board, and T-shaped grooves are provided on both sides of the lower card flap main board, respectively used to connect the vertical claws on both sides;

[0014] Furthermore, the vertical claw structures on both sides are completely identical and consistent with the vertical claw structure in the upper clamping flap;

[0015] Furthermore, the adjustment components are 2 sets and are completely identical, and are consistent with the adjustment components in the upper clamping flap, and are all adjustment screws, adjustment plates, and adjustment plate connecting screws;

[0016] Furthermore, a connecting pin hole is provided in the middle of the lower flap main board, and a lower flap connecting pin is provided in the connecting pin hole, one end of the lower flap connecting pin is connected to the lower flap main board, and the other end is connected to the testing machine;

[0017] The utility model adjusts the adjusting screw of the assembly to enable the upper clamping flap vertical plate of the upper clamping flap vertical claw part, the lower clamping flap left vertical plate and the lower clamping flap right vertical plate of the lower clamping flap vertical claw part to move left and right to adapt to the width dimensions of retaining frames of different specifications and models, thereby meeting the requirements of the bending fracture force inspection technical standards of retaining frames of different specifications and models and realizing the universalization of the clamp.

[0018] The beneficial effects of the utility model are:

[0019] Through the adjustable movable vertical plates of the upper clamping flap and the lower clamping flap, when testing the bending and breaking force of the cage, the distance between the vertical plates of the fixture is adjusted according to the size of the cage to adapt to the test requirements of cages of different specifications and models, thereby realizing the universalization of the fixture. Only one pair of fixtures is used to complete the bending and breaking force tests of cages of various specifications and models, thereby solving the technical problems of the prior art such as various types of fixtures, high production costs, cumbersome management, and low operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the bending fracture force testing fixture of the utility model in the prior art;

[0021] Figure 2 This is a schematic diagram of the bending fracture force test of the prior art cage of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the fixture of the utility model;

[0023] Figure 4 for Figure 3 Side view of

[0024] Figure 5 This is a structural diagram of the upper card flap mainboard of the utility model;

[0025] Figure 6 for Figure 5 Left side sectional view of

[0026] Figure 7 for Figure 5 Another partial cross-sectional view of;

[0027] Figure 8 This is a structural diagram of the upper flap stand plate of the utility model;

[0028] Fig. 9 for Figure 8 A side cross-sectional view of

[0029] Fig.10 This is the structural diagram of the adjustment plate of the utility model;

[0030] Fig.11 for Fig.10 A side cross-sectional view of

[0031] Fig.12 for Fig.10 A top view of

[0032] Fig.13 This is a structural diagram of the fixed plate of the utility model;

[0033] Fig.14 for Fig.13 A side cross-sectional view of

[0034] Fig.15 This is the structural diagram of the adjusting screw of the utility model;

[0035] Fig.16 This is a structural diagram of the lower card flap mainboard of the utility model;

[0036] Fig.17 for Fig.16 AA view;

[0037] Fig.18 for Fig.16 BB direction view;

[0038] Fig.19 This is a structural diagram of the left vertical plate of the lower clip of the utility model;

[0039] Fig. 20 for Fig.19 A side cross-sectional view of

[0040] Fig.21 This is a structural diagram of the right side vertical plate of the lower clamping flap of the utility model;

[0041] Fig. 22 for Fig.21 Side cross-sectional view of .

[0042] In the figure, 1. upper flap connecting pin; 2. adjusting plate connecting screw; 3. adjusting plate; 4. adjusting screw; 5. fixing plate connecting screw; 6. fixing plate; 7. upper flap vertical plate; 8. upper flap main board; 9. lower flap left vertical plate; 10. lower flap right vertical plate; 11. lower flap main board; 12. lower flap connecting pin. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0044] like Figure 3-22 The bending fracture force testing fixture of an engineering plastic retainer shown in the figure comprises: an upper clamping flap and a lower clamping flap; the upper clamping flap is a single-side claw structure, and the lower clamping flap is a symmetrical double-side claw structure; the claw of the upper clamping flap and the claw on one side of the lower clamping flap are located on the same side, and the claw on the other side of the lower clamping flap is located on the other side; the retainer is clamped by the single-side claw of the upper clamping flap and the double-side claws of the lower clamping flap;

[0045] The upper clamping flap comprises a horizontal fixing portion and a movable vertical claw portion, and the vertical claw portion is axially movable relative to the horizontal fixing portion through an adjustment component;

[0046] The horizontal fixing part is the upper flap main board 8, and the vertical claw part includes: an upper flap vertical plate 7, a fixing plate 6, and a fixing plate connecting screw 5. The adjustment component includes an adjusting screw 4, an adjusting plate 3 and an adjusting plate connecting screw 2; a T-slot is provided on one side of the upper flap main board 8 where the vertical claw part is provided, and the upper flap vertical plate 7 is provided as a T-shaped structure matching the T-slot of the upper flap main board 8, and the upper flap vertical plate 7 is connected to the upper flap main board 8 through the T-slot; a fixing plate 6 is provided on the outer side of the upper flap vertical plate 7, and two screw holes arranged up and down are provided at the lower part of the fixing plate 6 corresponding to the lower part of the upper flap vertical plate 7, and the fixing plate 6 is connected to the upper flap vertical plate 7 through the fixing plate connecting screw 5 that is penetrated through the screw hole; the adjusting plate 3 is L-shaped in cross section, and the adjusting plate 3 is connected to the upper flap main board 8 through the adjusting plate connecting screw 2; the adjusting screw 4 is threadedly connected to the adjusting plate 3;

[0047] Further, the adjusting screw 4 is connected with the upper end of the vertical claw; a groove is provided at the contact position between the upper clamping flap vertical plate 7 and the head of the adjusting screw 4, and the head of the adjusting screw 4 is embedded in the groove to cooperate with it, and a U-shaped portion is provided on the upper part of the fixing plate 6 to cooperate with the middle connecting shaft of the adjusting screw 4; the adjusting screw 4 is connected with the fixing plate 6 and the upper clamping flap vertical plate 7 to form a whole;

[0048] Furthermore, a connecting pin hole is provided in the middle of the upper flap main board 8, and an upper flap connecting pin 1 is provided in the connecting pin hole, one end of the upper flap connecting pin 1 is connected to the upper flap main board 8, and the other end is connected to the testing machine;

[0049] When the upper flap is in use, the upper flap vertical plate 7 is driven to move axially along the T-slot of the upper flap main plate 8 by rotating the adjusting screw 4 in positive and negative phases; thereby adjusting the vertical claw of the upper flap to the required position.

[0050] Furthermore, the lower clamping flap includes a horizontal fixing portion and movable vertical claw portions located on both sides of the horizontal fixing portion, and the vertical claw portions on each side are axially movable relative to the horizontal fixing portion through an adjustment assembly;

[0051] Furthermore, the horizontal fixing portion is a lower card flap main board 11, and both sides of the lower card flap main board 11 are provided with T-shaped grooves, which are respectively used to connect the vertical claws on both sides;

[0052] Furthermore, the vertical claw structures on both sides are completely identical and consistent with the vertical claw structure in the upper clamping flap;

[0053] Furthermore, the adjustment components are 2 sets and are completely identical, and are consistent with the adjustment components in the upper clamping flap, and are all adjustment screws 4, adjustment plates 3 and adjustment plate connecting screws 2;

[0054] Furthermore, a connecting pin hole is provided in the middle of the lower flap main board 11, and a lower flap connecting pin 12 is provided in the connecting pin hole. One end of the lower flap connecting pin 12 is connected to the lower flap main board 11, and the other end is connected to the testing machine.

[0055] Specifically, the vertical claws on both sides of the lower flap are distinguished by the left vertical plate 9 of the lower flap and the right vertical plate 10 of the lower flap:

[0056] The adjusting plate 3 is connected to the lower flap main board 11 through the adjusting plate connecting screw 2; the adjusting screw 4 is threadedly connected to the adjusting plate 3; the lower flap main board 11 is provided with a T-slot, and the lower flap left vertical plate 9 is connected to the lower flap main board 11 through the T-slot; the fixing plate 6 is connected to the lower flap left vertical plate 9 through the fixing plate connecting screw 5; the fixing plate 6 is connected to the adjusting screw 4 and the lower flap left vertical plate 9 as a whole, and the adjusting screw 4 is rotated forward and backward to make the lower flap left vertical plate 9 move left and right along the T-slot;

[0057] Similarly, the right side vertical plate 10 of the lower card flap is connected to the lower card flap main board 11 through a T-slot; the fixed plate 6 is connected to the right side vertical plate 10 of the lower card flap through the fixed plate connecting screw 5; the fixed plate 6 is connected to the adjusting screw 4 and the right side vertical plate 10 of the lower card flap as a whole, and the adjusting screw 4 is rotated forward and backward to move the right side vertical plate 10 of the lower card flap left and right along the T-slot.

[0058] The utility model adjusts the adjusting screw 4 of the assembly to move the upper clamping flap vertical plate 7 of the upper clamping flap vertical claw, the lower clamping flap left vertical plate 9, and the lower clamping flap right vertical plate 10 to the left and right to adapt to the width dimensions of retaining frames of different specifications and models, thereby meeting the requirements of the bending fracture force inspection technical standards for retaining frames of different specifications and models and realizing the universalization of the fixture.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A bending fracture force test fixture for an engineering plastic cage, characterized in that: include: An upper clamping flap and a lower clamping flap; the upper clamping flap is a single-sided claw structure, and the lower clamping flap is a symmetrical double-sided claw structure; the claw of the upper clamping flap and the claw on one side of the lower clamping flap are located on the same side, and the claw on the other side of the lower clamping flap is located on the other side; the retaining frame is clamped by the single-sided claw of the upper clamping flap and the double-sided claws of the lower clamping flap.

2. The bending fracture force testing fixture of an engineering plastic cage according to claim 1, characterized in that: The upper clamping flap comprises a horizontal fixing portion and a movable vertical claw portion, and the vertical claw portion is axially moved relative to the horizontal fixing portion through an adjustment component.

3. The bending fracture force testing fixture of an engineering plastic cage according to claim 2, characterized in that: The horizontal fixing part is the upper flap main board, and the vertical claw part includes: an upper flap upright plate, a fixing plate, and a fixing plate connecting screw. The adjustment component includes an adjusting screw, an adjusting plate, and an adjusting plate connecting screw. A T-slot is provided on one side of the upper flap main board where the vertical claw part is provided, and the upper flap upright plate is provided as a T-shaped structure matching the T-slot of the upper flap main board, and the upper flap upright plate is connected to the upper flap main board through the T-slot. A fixing plate is provided on the outer side of the upper flap upright plate, and two screw holes arranged up and down are provided at the lower part of the fixing plate corresponding to the lower part of the upper flap upright plate, and the fixing plate is connected to the upper flap upright plate through the fixing plate connecting screw passing through the screw hole. The adjustment plate has an L-shaped cross-section, and the adjustment plate is connected to the upper flap main board through the adjusting plate connecting screw. The adjusting screw is threadedly connected to the adjustment plate.

4. The bending fracture force testing fixture of an engineering plastic cage according to claim 3, characterized in that: The adjusting screw is connected with the upper end of the vertical claw; a groove is provided at the contact position between the upper clamping flap plate and the adjusting screw head, and the adjusting screw head is embedded in the groove and cooperates with it. A U-shaped portion is provided on the upper part of the fixed plate to cooperate with the middle connecting shaft of the adjusting screw; the fixing plate and the upper clamping flap plate are connected and cooperated into one through the adjusting screw.

5. The bending fracture force testing fixture of an engineering plastic cage according to claim 3, characterized in that: A connecting pin hole is provided in the middle of the upper flap main board, and an upper flap connecting pin is arranged in the connecting pin hole. One end of the upper flap connecting pin is connected to the upper flap main board, and the other end is connected to the testing machine.

6. The bending fracture force testing fixture of an engineering plastic cage according to claim 3, characterized in that: The lower clamping flap comprises a horizontal fixing portion and movable vertical claw portions located on both sides of the horizontal fixing portion, and the vertical claw portions on each side are axially moved relative to the horizontal fixing portion through an adjustment component.

7. The bending fracture force testing fixture of an engineering plastic cage according to claim 6, characterized in that: The horizontal fixing part is a lower clamping flap main board, and T-shaped grooves are provided on both sides of the lower clamping flap main board, which are respectively used to connect the vertical claws on both sides.

8. The bending fracture force testing fixture of an engineering plastic cage according to claim 7, characterized in that: The vertical claw structures on both sides are completely the same and consistent with the vertical claw structure in the upper clamping flap.

9. The bending fracture force testing fixture of an engineering plastic cage according to claim 6, characterized in that: There are two sets of adjustment components which are completely identical and consistent with the adjustment components in the upper clamping flap, which are adjustment screws, adjustment plates and adjustment plate connecting screws.

10. The bending fracture force testing fixture of an engineering plastic cage according to claim 7, characterized in that: Furthermore, a connecting pin hole is provided in the middle of the lower flap main board, a lower flap connecting pin is arranged in the connecting pin hole, one end of the lower flap connecting pin is connected to the lower flap main board, and the other end is connected to the testing machine.

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