Quick connector for inflation detection of brake chamber

Abstract

The utility model relates to the technical field of connectors, and discloses a brake chamber inflation detection quick connector which comprises a mandrel, one end of the mandrel is connected with an inflation hole, the other end of the mandrel is detachably and fixedly connected with a quick connector, at least two clamping jaws are arranged on the periphery of the mandrel in a sleeved mode, each clamping jaw is in an arc shell shape, and each clamping jaw comprises a clamping jaw front section and a clamping jaw middle section. The diameter of the clamping jaw front section is smaller than that of the clamping jaw middle section, the inner wall of the clamping jaw front section is movably attached to the outer wall of the mandrel, a set distance is formed between the inner wall of the clamping jaw middle section and the outer wall of the mandrel, and an extrusion part used for extruding the clamping jaw middle section is arranged on the clamping jaw middle section. The hole diameter of the mandrel can be increased to 6.5 mm, and the mandrel is not prone to breakage, simple in structure and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of connector, especially relates to a brake chamber inflation detection quick connector. BACKGROUND

[0002] The quick connector for inflation is a device for quickly connecting inflation equipment (such as air pump, inflator, etc.) and inflated objects (such as tires, balloons, air cushions, etc.). Its main purpose is to facilitate and efficiently perform inflation operation, save time and ensure the sealing of the inflation process.

[0003] In the production of axle products, the axle products with automatic clearance adjustment arms must be tested for inflation adjustment brake clearance on line, that is, through dozens of inflation and exhaust cycles of the brake chamber running brake cavity (simulating the driver's repeated stepping and releasing of the brake pedal), checking whether the automatic clearance adjustment arm can automatically adjust the excessive brake clearance to the design requirement range. During the inflation and exhaust test of the brake chamber of the 8-ton axle, the push rod does not completely push out after inflation, and the exhaust starts. After exhaust, the push rod does not completely retract and the inflation starts again. After inflation adjustment of the brake clearance, the brake clearance often fails, which brings safety hazards to vehicle operation. Therefore, the hole size of the quick connector connected to the brake chamber should be appropriate, and the amount of compressed air flowing through the quick connector per unit time should be sufficient to meet the production needs and ensure product qualification.

[0004] The quick connector produced by Tianjin Lang'an Science and Technology Development Co., Ltd. with model number LA801 is currently used. The product adopts an axial taper expansion method. When a sealed connection needs to be established, the annular protrusion I connected with the core shaft moves towards the protrusion II, the protrusion I is clamped on the inner side of the protrusion II, the clamping sleeve is expanded, the clamping sleeve is restored to the standard thread, and the internal thread of the workpiece is fully matched to establish a sealed connection. The design of the product structure will limit the hole size of the quick connector. Because the size of the pipeline connected with the quick connector is fixed, the clamping sleeve contacts the inner wall of the pipe opening when a sealed connection needs to be established. If the core shaft hole size is too large, the annular protrusion I is difficult to be clamped into the empty pipe formed by the clamping sleeve when the handle is turned, and the sealed connection cannot be completed. Moreover, the clamping sleeve structure is also prone to damage. The hole size of this product is 2.5mm, and the maximum can be increased by 4mm. However, when the hole size is increased to 4mm, the amount of compressed air flowing through the quick connector per unit time is still insufficient, which cannot meet the test needs. Moreover, the internal structure of the product is complex, which is not convenient for maintenance and replacement of internal components. UTILITY MODEL CONTENTS

[0005] The utility model discloses a brake chamber inflation detection quick connector, through the rotation butterfly bolt control claw end department rises, thereby establishes the sealed connection with the interface at brake chamber, the hole diameter of the mandrel can be increased to 6.5mm, and the mandrel is not easy to break, simple structure, long service life, can satisfy the test need.

[0006] The utility model discloses a technical scheme as follows: one end of the mandrel is connected with the inflation hole, the other end is detachably fixedly connected with the quick connector, at least two claws are peripherally sleeved on the mandrel, the claw is arc shell shape, the claw includes a claw front section and a claw middle section, the diameter of the claw front section is less than the diameter of the claw middle section, the inner wall of the claw front section is movably attached to the outer wall of the mandrel, the inner wall of the claw middle section has a set distance from the outer wall of the mandrel, and a pressing member is arranged on the claw middle section for pressing the claw middle section.

[0007] By adopting the above technical scheme, the claw front section and the claw middle section form a lever point at the connection, the force of the pressing member pressing the claw middle section can be used as power to make the claw front section rise, so that when the quick connector is connected with the inflation hole of the brake chamber, the claw front section can abut against the hole wall of the brake chamber to achieve a sealing effect.

[0008] Moreover, the degree of the claw front section rising can be controlled by changing the force of the pressing member acting on the claw middle section, and furthermore, since the claw is arranged on the periphery of the mandrel and the inner diameter of the inflation hole of the brake chamber is fixed, the degree of the claw front section rising is controllable, so the hole diameter of the mandrel is controllable and can be further increased to meet actual requirements.

[0009] The mandrel is arranged inside the claw, the structure is simple, the quick connector component is convenient to replace, the claw front section rising will not damage the mandrel, the mandrel is not easy to break, and the at least two claws are evenly distributed on the periphery of the mandrel, so that the clamping force of the claw on the mandrel is evenly distributed, which can effectively avoid the problems of mandrel damage or unstable clamping caused by excessive or insufficient local force.

[0010] The utility model discloses further arrange: the claw still includes the claw rear section that the end portion fixed connection of the claw middle section, the inner wall of the claw rear section is movably attached to the outer wall of the mandrel.

[0011] By adopting the above technical scheme, the claw middle section and the claw rear section form a lever point at the connection, at this time, the whole claw structure forms two lever structures, when the pressing member presses the claw middle section, the claw front section and the claw rear section will both rise, the claw rear section rises to abut against the inner wall of the quick connector, which can limit the displacement of the claw in the axial direction and limit the radial movement of the claw, so that the multiple claws are tightly embraced on the periphery of the mandrel to ensure the tightness when the quick connector is connected with the brake chamber.

[0012] The further setting of the utility model discloses: the outer wall of the mandril is sleeved with the limit ring, the limit ring is located between the claw and the quick connector, the inner wall of the limit ring is movably attached to the outer wall of the mandril, one end of the limit ring is abutted with the middle section of the claw, the outer wall of the mandril is provided with the ring-shaped check ring groove, the check ring is movably arranged in the check ring groove, and the two sides of the check ring are respectively abutted with the limit ring and the quick connector.

[0013] Through the above technical scheme, the limit ring is additionally arranged between the claw and the quick connector, so that the installation of the quick connector is more flexible, and the quick connector is convenient to disassemble, when the extrusion piece extrudes the middle section of the claw, the rear section of the claw is abutted with the inner wall of the limit ring, the limit ring limits the claw, the check ring is arranged at the end of the side, away from the claw, of the limit ring, the check ring can prevent the limit ring from sliding, the stability of the claw structure is ensured, and the tightness when the quick connector is connected with the brake chamber is ensured.

[0014] The further setting of the utility model discloses: the outer wall of the end of the mandril is threadedly connected with the inner wall of the quick connector.

[0015] Through the above technical scheme: the connection mode of the mandril and the quick connector adopts thread engagement, first, the connection between the compressed air pipe and the quick connector can be stable and reliable, and the quick connector cannot be easily loosened or separated during the working process, second, the mode is quick to install, and the connection operation can be completed in a short time, and the maintenance and disassembly are also convenient, and during the connection process, the relative position of the mandril and the quick connector can be accurately controlled by controlling the screwing depth of the thread, and different installation precision requirements can be met.

[0016] The further setting of the utility model discloses: the number of claws is 2.

[0017] Through the above technical scheme: the number of claws is set to two, because the two claws are relatively simple in structure, the manufacturing and installation cost is lower, and while meeting the holding requirement, the complexity and potential friction loss between components can be reduced.

[0018] The further setting of the utility model discloses: the number of extrusion pieces is 1, the two middle sections of the claws are respectively a first middle section and a second middle section, the extrusion piece is located on the first middle section, and the second middle section is symmetrically provided with a claw rib along the direction parallel to the central axis of the mandril on the side close to the first middle section.

[0019] Through the above technical scheme: when the number of claws is two, one extrusion piece is arranged, the two middle sections of the claws are respectively a first middle section and a second middle section, the force of the extrusion piece acts on the first middle section, the second middle section is provided with a protruding claw rib, the claw rib of the second middle section extends into the inner wall of the first middle section, the first middle section and the second middle section are clamped as a whole, and the force of the extrusion piece acting on the first middle section can also ensure that the second middle section is stressed.

[0020] The further setting of the utility model discloses that: the outer wall of the middle section of the claw is provided with an annular groove, and a hoop is sleeved on the annular groove.

[0021] By adopting the above technical scheme: since two or more clamps are arranged on the outer periphery of the mandrel, the hoop can clamp the clamps on the outer periphery of the mandrel, the clamps can form a clamp pipe with close connection, under the action of the extrusion force, each clamp can bear force uniformly, the stability of the workpiece is maintained, the movement of the hoop can be limited by arranging the annular groove, the hoop is prevented from moving randomly on the clamp, the hoop can play the clamping role, and meanwhile, since the hoop is limited in the annular groove, the constraint effect of the hoop on the clamp is more stable and accurate, the distribution of the clamps on the mandrel can be more uniform and symmetrical, and the contact position and force of each clamp on the workpiece can be controlled better.

[0022] The further setting of the utility model discloses that: the outer wall of the middle section of the claw is provided with an annular groove, and a hoop is sleeved on the annular groove.

[0023] By adopting the above technical scheme: the sealing ring has good elasticity and flexibility, can play a good sealing effect between the mandrel and the inflation hole, prevent gas from leaking from the connecting part, meanwhile, the sealing ring can play the role of buffering and shock absorption, avoid the damage of parts caused by friction and collision, also can reduce noise and vibration, improve the stability and reliability of the connection, the sealing groove provides a mounting and fixing position for the sealing ring, ensures that the sealing ring does not shift or fall off during the working process, and the position of the sealing ring can be accurately determined, so that the sealing ring can accurately correspond to the sealing surface of the inflation hole and the mandrel during installation, ensures the uniformity and integrity of the sealing.

[0024] The further setting of the utility model discloses that: the extrusion piece is a butterfly bolt, the middle section of the claw is provided with a threaded hole, and the butterfly bolt is threadedly connected with the threaded hole.

[0025] By adopting the above technical scheme: when the extrusion piece is a butterfly bolt, the operator can quickly tighten or loosen the butterfly bolt with hands, saves time and improves efficiency, the connection of the bolt is also stable and reliable, and the butterfly bolt is small and light, so that the installation and disassembly are convenient and flexible.

[0026] The utility model discloses the beneficial effect is:

[0027] 1. The lever point is formed at the connecting position of the front section of the claw and the middle section of the claw, the force of the extrusion piece extruding the middle section of the claw can be used as power, so that the front section of the claw is lifted, when the quick connecting piece is connected with the vent hole of the brake chamber, the front section of the claw abuts against the hole wall of the brake chamber, and the sealing effect is achieved.

[0028] 2. The degree of the front section of the claw being raised can be controlled by changing the size of the force exerted by the extrusion piece on the middle section of the claw, and since the claw is arranged on the periphery of the mandrel and the inner diameter of the vent hole of the brake chamber is constant, the degree of the front section of the claw being raised is controllable, so the hole diameter of the mandrel is controllable, and the hole diameter of the mandrel can be further increased to meet the actual needs.

[0029] 3. The mandrel is arranged inside the claw, the structure is simple, the components of the quick connector are convenient to replace, the front section of the claw being raised will not damage the mandrel, the mandrel is not easy to break, and at least two claws are evenly distributed in the periphery of the mandrel, so that the clamping force of the claw on the mandrel is evenly distributed, and problems such as damage of the mandrel or unstable clamping caused by excessive or insufficient local force can be effectively avoided.

[0030] 4. After the rear section of the claw is added, the middle section of the claw and the rear section of the claw form a lever point at the connection, the entire claw structure forms two lever structures, when the extrusion piece extrudes the middle section of the claw, the front section of the claw and the rear section of the claw will both be raised, and the rear section of the claw is raised against the inner wall of the quick plug connector, which can limit the displacement of the claw in the axial direction and limit the radial movement of the claw, so that multiple claws are tightly surrounded around the periphery of the mandrel, and the tightness when the quick connector is connected with the brake chamber is ensured.

[0031] 5. The limiting ring is arranged between the claw and the quick plug connector, so that the installation of the quick connector is more flexible and convenient to disassemble, when the extrusion piece extrudes the middle section of the claw, the rear section of the claw is raised against the inner wall of the limiting ring, the limiting ring limits the claw, a retaining ring is arranged at the end of the limiting ring away from the claw, the retaining ring can prevent the sliding of the limiting ring, the stability of the claw structure is ensured, and the tightness when the quick connector is connected with the brake chamber is ensured.

[0032] 6. When the extrusion piece is a butterfly bolt, the operator can quickly tighten or loosen the butterfly bolt by hand, time is saved, efficiency is improved, the connection of the bolt is stable and reliable, and the butterfly bolt is small and light, so it is convenient to install and disassemble and flexible. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0035] Figure 2 It is a schematic diagram of the main structure of the present application.

[0036] Figure 3 is a sectional view of the utility model.

[0037] Figure 4 is an explosion schematic view of the utility model.

[0038] Figure 5 is a sectional view of the utility model of the claw rear section of the claw.

[0039] Figure 6 is an explosion schematic view of the utility model of the claw rear section of the claw.

[0040] In the figure, 1, mandrel;2, claw;21, claw front section;22, claw middle section;22a, first middle section;22b, second middle section;23, claw rear section;24, claw rib;3, sealing groove;4, sealing ring;5, annular groove;6, hoop;7, threaded hole;8, butterfly bolt;9, limit ring;10, baffle ring groove;11, baffle ring;12, quick plug connector. DETAILED DESCRIPTION

[0041] The technical scheme of the utility model will be described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0042] The utility model provides a kind of brake chamber inflation detection quick connector, mandril 1 one end is connected with inflation hole, the other end is detachably fixed with quick plug connector 12, at least two clamping claws 2 are peripherally sleeved on mandril 1, clamping claw 2 is arc shell shape, clamping claw 2 includes clamping claw front section 21 and clamping claw middle section 22, the diameter of clamping claw front section 21 is less than the diameter of clamping claw middle section 22, the inner wall of clamping claw front section 21 is movably attached to the outer wall of mandril 1, there is set distance between the inner wall of clamping claw middle section 22 and the outer wall of mandril 1, clamping claw middle section 22 is provided with extrusion piece for extruding clamping claw middle section 22, clamping claw 2 further includes the clamping claw rear section 23 fixedly connected with the end of the clamping claw middle section 22, the inner wall of clamping claw rear section 23 is movably attached to the outer wall of mandril 1, limit ring 9 is peripherally sleeved on the outer wall of mandril 1, limit ring 9 is located between clamping claw 2 and quick plug connector 12, the inner wall of limit ring 9 is movably attached to the outer wall of mandril 1, one end of limit ring 9 is in abutment with clamping claw middle section 22, the outer wall of mandril 1 is provided with annular baffle groove 10, baffle 11 is movably arranged in baffle groove 10, the two sides of baffle 11 respectively abut on limit ring 9 and quick plug connector 12, the end outer wall of mandril 1 is threadedly connected with the inner wall of quick plug connector 12, the number of clamping claw 2 is two, the number of extrusion piece is one, two clamping claw middle sections 22 are respectively first middle section 22a and second middle section 22b, extrusion piece is located on first middle section 22a, second middle section 22b is symmetrically provided with clamping claw rib 24 along the direction parallel to the central axis of mandril 1 on the side close to first middle section 22a, annular groove 5 is formed on the outer wall of clamping claw middle section 22, hoop 6 is sleeved on annular groove 5, sealing groove 3 is formed on the outer wall of mandril 1 close to inflation hole, sealing ring 4 is peripherally sleeved on sealing groove 3, extrusion piece is butterfly bolt 8, threaded hole 7 is formed on clamping claw middle section 22, butterfly bolt 8 is threadedly connected with threaded hole 7.

[0043] Clamping claw front section 21 and clamping claw middle section 22 form lever point at connecting place, the force of extrusion piece extruding clamping claw middle section 22 can be used as power, so that clamping claw front section 21 is warped, when quick connector and the air hole of brake chamber are connected, clamping claw front section 21 is tightly abutted on the hole wall of brake chamber, reaches the effect of sealing, the degree of warping of clamping claw front section 21 can be controlled by changing the force of extrusion piece acting on clamping claw middle section 22, further, since clamping claw 2 is arranged on the periphery of mandril 1, the inner diameter of air hole of brake chamber is certain, the degree of warping of clamping claw front section 21 is controllable, thus the hole diameter of mandril 1 is controllable, the hole diameter of mandril 1 can be further increased to meet actual demand.

[0044] Mandril 1 is arranged inside clamping claw 2, simple structure, quick connector component is convenient to replace, clamping claw front section 21 warping does not cause damage to mandril 1, mandril 1 is not easy to break, at least two clamping claws 2 are evenly distributed on the periphery of mandril 1, so that the clamping force of clamping claw 2 to mandril 1 is evenly distributed, the problems of mandril 1 damage or unstable clamping caused by local excessive or insufficient stress can be effectively avoided.

[0045] After the addition of the clamping jaw rear section 23, the clamping jaw middle section 22 and the clamping jaw rear section 23 form a fulcrum at the connection, and the entire clamping jaw 2 is configured to form two lever structures. When the extrusion member extrudes the clamping jaw middle section 22, the clamping jaw front section 21 and the clamping jaw rear section 23 will both be raised, and the clamping jaw rear section 23 is raised against the inner wall of the quick connector 12. On the one hand, this limits the displacement of the clamping jaw 2 in the axial direction, and on the other hand, it also limits the radial movement of the clamping jaw 2, so that the plurality of clamping jaws 2 tightly embrace the outer periphery of the mandrel 1, thereby ensuring the tightness when the quick connector is connected to the brake chamber.

[0046] A limiting ring 9 is additionally arranged between the clamping jaw 2 and the quick connector 12, which makes the installation of the quick connector more flexible and facilitates disassembly. When the extrusion member extrudes the clamping jaw middle section 22, the clamping jaw rear section 23 is raised and abuts against the inner wall of the limiting ring 9, and the limiting ring 9 limits the displacement of the clamping jaw 2. A retaining ring 11 is arranged at the end of the limiting ring 9 away from the clamping jaw 2, which prevents the limiting ring 9 from slipping and ensures the stability of the clamping jaw 2, thereby ensuring the tightness when the quick connector is connected to the brake chamber.

[0047] The working process of the embodiment is as follows:

[0048] S1: Quick connector in non-working state:

[0049] The butterfly bolt 8 is not tightened, and at this time, the clamping jaw middle section 22 is not stressed, and the clamping jaw is embraced around the outer periphery of the mandrel 1 under the constraint of the hoop 6. The end of the quick connector close to the clamping jaw 2 is inserted into the inflation hole of the brake chamber, and the end of the quick connector 12 is connected to the compressed air pipe.

[0050] S2: Quick connector in working state:

[0051] The butterfly bolt 8 is manually tightened, the clamping jaw middle section 22 is stressed, and the clamping jaw front section 21 and the clamping jaw rear section 23 are both raised. The clamping jaw front section 21 is raised and abuts against the hole wall of the brake chamber, so that the quick connector is tightly connected to the brake chamber. The clamping jaw rear section 23 is raised and abuts against the inner wall of the limiting ring 9, which ensures the stability of the clamping jaw 2 and prevents the clamping jaw 2 from shifting. At this time, the valve of the compressed air pipe is opened, and the compressed air enters the brake chamber through the quick connector.

Claims

1. A quick connector for detecting brake chamber inflation, comprising a spindle (1), characterized in that: One end of the mandrel (1) is connected to the air inlet, and the other end is detachably and fixedly connected to the quick connector (12). At least two claws (2) are sleeved around the mandrel (1). The claws (2) are arc-shaped shells. The claws (2) include a front section (21) and a middle section (22). The diameter of the front section (21) is smaller than the diameter of the middle section (22). The inner wall of the front section (21) can be movably fitted to the outer wall of the mandrel (1). There is a set distance between the inner wall of the middle section (22) and the outer wall of the mandrel (1). The middle section (22) is provided with a pressing element for pressing the middle section (22).

2. The quick connector according to claim 1, characterized in that: The jaw (2) also includes a jaw rear section (23) fixedly connected to the end of the jaw middle section (22), and the inner wall of the jaw rear section (23) is movably attached to the outer wall of the mandrel (1).

3. The quick connector according to claim 1, characterized in that: A limiting ring (9) is fitted on the outer wall of the mandrel (1). The limiting ring (9) is located between the claw (2) and the quick connector (12). The inner wall of the limiting ring (9) is movably fitted to the outer wall of the mandrel (1). One end of the limiting ring (9) abuts against the middle section (22) of the claw. A circular retaining ring groove (10) is opened on the outer wall of the mandrel (1). A retaining ring (11) is movably arranged in the retaining ring groove (10). The two sides of the retaining ring (11) can abut against the limiting ring (9) and the quick connector (12) respectively.

4. The quick connector according to claim 3, characterized in that: The retaining ring (11) is one of a snap ring, a wire retaining ring, or a wave retaining ring.

5. The quick connector according to claim 1, characterized in that: The outer wall of the end of the mandrel (1) is threadedly connected to the inner wall of the quick-connect fitting (12).

6. The quick connector according to claim 1, characterized in that: The number of the claws (2) is 2.

7. The quick connector according to claim 6, characterized in that: The number of extrusion parts is 1. The two jaw sections (22) are the first section (22a) and the second section (22b), respectively. The extrusion part is located on the first section (22a). The second section (22b) is symmetrically provided with jaw ribs (24) on the side of the second section (22b) close to the first section (22a) in a direction parallel to the central axis of the mandrel (1).

8. The quick connector according to claim 1, characterized in that: An annular groove (5) is provided on the outer wall of the middle section (22) of the claw, and a hoop (6) is fitted on the annular groove (5).

9. The quick connector according to claim 1, characterized in that: A sealing groove (3) is provided on the outer wall of the end of the mandrel (1) near the air hole, and a sealing ring (4) is fitted on the sealing groove (3).

10. The quick connector according to claim 1, characterized in that: The extrusion component is a wing bolt (8), and the middle section (22) of the claw is provided with a threaded hole (7), and the wing bolt (8) is threadedly connected to the threaded hole (7).

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