Welding sleeve for air bag bridge guide arm of semitrailer

Abstract

The utility model belongs to the technical field of guide arm welding sleeves, and particularly relates to a semitrailer air bag bridge guide arm welding sleeve. Comprising two metal sleeves, a pin shaft is sleeved with the two metal sleeves respectively, the pin shaft is sleeved with a lining used for being connected with a leaf spring eye, and the two metal sleeves are located at the two ends of the lining respectively; one end of the pin shaft is in threaded connection with a nut which is used for locking the lining and the metal sleeve; the nut fixing device can act on the nut to achieve better fixing and prevent the nut from loosening when the semitrailer shakes, and meanwhile the guide arm can be prevented from deforming. The welding sleeve can avoid serious loss of parts caused by shaking and abrasion of the semitrailer, and the service life of the welding sleeve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of guide arm welding sleeves, and in particular relates to a guide arm welding sleeve for an air bag bridge of a semitrailer. Background Art

[0002] The airbag bridge is mainly supported by air pressure, which can significantly reduce the weight of the vehicle body, protect the chassis components, and improve the cargo capacity of the vehicle. The airbag bridge guide arm works in conjunction with other components in the suspension system (such as springs, shock absorbers, etc.) to elastically connect the vehicle body and wheels together, thereby reducing the impact caused by uneven ground or other factors during vehicle driving; the automobile guide arm welding sleeve is a sleeve-shaped component made of metal or alloy, which is fixed to the guide arm by welding, and is used to enhance the structural strength of the guide arm, provide positioning support or connect other components.

[0003] The Chinese patent application number 201210112220.4 discloses a leaf spring guide arm composite air suspension, including a vehicle frame with two parallel longitudinal beams, a leaf spring bracket is fixed to the corresponding position of the two longitudinal beams, each leaf spring bracket is connected to the leaf spring bushing at the front end of a leaf spring by bolts, and the rear end of each leaf spring is fixedly connected to the base of an airbag assembly; a vehicle bridge is horizontally and vertically arranged between the middle sections of the two leaf springs, and the two ends of the vehicle bridge are respectively clamped and fixed on the leaf spring by a shock absorber support; a shock absorber is arranged on the shock absorber support; and two height adjustment valves are also included, and each height adjustment valve is fixed to the two ends of the vehicle bridge by a height valve connecting rod. This patent is optimized on the basis of the existing technology, further simplifies the structure, reduces costs, and improves safety.

[0004] Usually, when connecting the guide arm to the airbag bridge, a welding sleeve is used to fix them. Usually, after the welding sleeve is welded, the guide arm is easily deformed due to the locking of the nut. At the same time, since the semi-trailer is prone to shaking during driving, the nut may become loose and detached, and the shaking may cause wear, thereby reducing the service life of the components. Utility Model Content

[0005] In view of the above-mentioned shortcomings, the utility model provides a welding sleeve for the guide arm of the airbag bridge of a semi-trailer. The utility model can act on the nut to achieve better fixation and prevent the nut from loosening when the semi-trailer shakes, and can also prevent the guide arm from deformation. The utility model can avoid serious component loss due to vibration and wear of the semi-trailer, and improve the service life of the welding sleeve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A semi-trailer airbag bridge guide arm welding sleeve, comprising two metal sleeves, the two metal sleeves are respectively sleeved on a pin shaft, a bushing for connecting a leaf spring ear is sleeved on the pin shaft, and the two metal sleeves are respectively located at both ends of the bushing; a nut is threadedly connected to one end of the pin shaft for locking the bushing and the metal sleeve;

[0008] The metal sleeve comprises a metal sleeve body, and buffer grooves are provided on two separated sides of the metal sleeve bodies, and the diameter of the buffer grooves gradually decreases along the inside of the grooves. The two buffer grooves are respectively plugged with a first buffer plate and a second buffer plate, and the pin passes through the center of the first buffer plate and the second buffer plate. The sizes of the first buffer plate and the second buffer plate match the size of the buffer grooves. When the nut locks the bushing and the metal sleeve, there is a gap between the first buffer plate and the second buffer plate and the bottom of the corresponding buffer groove;

[0009] The two metal sleeve bodies are fixedly provided with welding rings on opposite sides thereof. The welding rings are sleeved on the pin shafts and are fixedly welded to the airbag bridge guide arms.

[0010] Furthermore, the pin includes a pin fixing end and a pin connecting end that are connected to each other, a square limiting protrusion is fixedly provided at the center of one side of the pin fixing end close to the pin connecting end, and a threaded end is provided on the side of the pin connecting end away from the pin fixing end, and the threaded end is threadedly connected to the nut; the bushing, metal sleeve, first buffer plate and second buffer plate are all sleeved on the pin connecting end.

[0011] Furthermore, the first buffer plate includes a first buffer plate body with a square structure, a square first limiting hole is opened through the middle of the first buffer plate body, and the first limiting hole is inserted into the square limiting protrusion; the second buffer plate includes a second buffer plate body with a square structure, a circular second limiting hole is opened through the middle of the second buffer plate body, and the second limiting hole is sleeved on the pin shaft connecting end.

[0012] Furthermore, a straight slot is provided on the welding ring, and the straight slot is communicated with the buffer slot.

[0013] Furthermore, when the nut is used to lock the bushing and the metal sleeve, the gap d between the first buffer plate and the second buffer plate and the bottom of the corresponding buffer groove is in the range of 1 mm < d < 2 mm.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model is fixed by welding the welding ring and the airbag bridge guide arm, and the first buffer plate and the second buffer plate are respectively plugged into the buffer groove. Since the diameter of the buffer groove is continuously reduced along the inside of the groove, when the nut locks the bushing and the metal sleeve, due to the cooperation of the inclined surface inside the buffer groove and the first buffer plate and the second buffer plate, the first buffer plate and the second buffer plate are moved into the buffer groove for expansion, and the buffer groove has a reaction force on the first buffer plate and the second buffer plate, which can act on the nut to achieve better fixation and prevent the nut from loosening when the semi-trailer shakes, and can also prevent the guide arm from deformation.

[0016] In addition, the utility model provides a gap between the first buffer plate and the second buffer plate and the bottom of the corresponding buffer groove. Since the diameter of the buffer groove continuously decreases along the inside of the groove, compared with the conventional welding sleeve, the utility model can avoid serious component wear due to vibration and wear of the semi-trailer, thereby improving the service life of the welding sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a semi-trailer airbag bridge guide arm welding sleeve of the utility model;

[0018] Figure 2 This is a schematic diagram of the dispersed structure of a semi-trailer airbag bridge guide arm welding sleeve of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of a welding sleeve of a guide arm of an airbag bridge of a semitrailer according to the utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of a semi-trailer airbag bridge guide arm welding sleeve of the utility model;

[0021] Figure 5 The utility model is a schematic diagram of the installation dispersion structure of a welding sleeve of a guide arm of an airbag bridge of a semitrailer.

[0022] The reference numerals are as follows:

[0023] Metal sleeve 100; metal sleeve 110; buffer groove 120; welding ring 130; straight slot 131; first buffer plate 200; first buffer plate body 210; first limiting hole 220; second buffer plate 300; second buffer plate body 310; second limiting hole 320; pin 400; pin fixing end 410; square limiting protrusion 420; pin connecting end 430; threaded end 431; bushing 500; nut 600. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] like Figure 1 to Figure 5 As shown, a semi-trailer airbag bridge guide arm welding sleeve includes two metal sleeves 100, the two metal sleeves 100 are respectively sleeved on the pin shaft 400, the pin shaft 400 is sleeved with a bushing 500 for connecting the leaf spring ear, and the two metal sleeves 100 are respectively located at both ends of the bushing 500; one end of the pin shaft 400 is threaded with a nut 600 for locking the bushing 500 and the metal sleeve 100;

[0027] The metal sleeve 100 comprises a metal sleeve body 110, and a buffer groove 120 is provided on two separated sides of the metal sleeve bodies 110. The diameter of the buffer groove 120 is continuously reduced along the inside of the groove. The first buffer plate 200 and the second buffer plate 300 are respectively inserted into the two buffer grooves 120. The pin 400 passes through the center of the first buffer plate 200 and the second buffer plate 300. The size of the first buffer plate 200 and the second buffer plate 300 matches the size of the buffer groove 120. When the nut 600 locks the bushing 500 and the metal sleeve 100, there is a gap between the first buffer plate 200 and the second buffer plate 300 and the groove bottom of the corresponding buffer groove 120.

[0028] A welding ring 130 is fixedly provided on one opposite side of the two metal sleeve bodies 110 . The welding ring 130 is sleeved on the pin 400 . The welding ring 130 is fixed to the airbag bridge guide arm by welding.

[0029] The utility model is fixed by welding the welding ring 130 and the airbag bridge guide arm, and the first buffer plate 200 and the second buffer plate 200 are respectively plugged into the buffer groove 120. Since the diameter of the buffer groove 120 is continuously reduced along the inside of the groove, when the nut 600 locks the bushing 500 and the metal sleeve 100, due to the cooperation between the inclined surface inside the buffer groove 120 and the first buffer plate 200 and the second buffer plate 200, the first buffer plate 200 and the second buffer plate 200 are moved into the buffer groove 120 and tightened. At the same time, the buffer groove 120 has a reaction force on the first buffer plate 200 and the second buffer plate 200, which can act on the nut 600 to achieve better fixation and prevent the nut 600 from loosening when the semi-trailer shakes, and can also prevent the guide arm from deformation.

[0030] In addition, the utility model provides a gap between the first buffer plate 200 and the second buffer plate 300 and the bottom of the corresponding buffer groove 120. Since the diameter of the buffer groove 120 continuously decreases along the inside of the groove, compared with the conventional welding sleeve, the utility model can avoid serious component wear due to vibration and wear of the semi-trailer, thereby improving the service life of the welding sleeve.

[0031] Furthermore, the pin 400 includes a pin fixing end 410 and a pin connecting end 430 that are connected to each other, a square limiting protrusion 420 is fixedly provided at the center of one side of the pin fixing end 410 close to the pin connecting end 430, and a threaded end 431 is provided on the side of the pin connecting end 430 away from the pin fixing end 410, and the threaded end 431 is threadedly connected to the nut 600; the bushing 500, the metal sleeve 100, the first buffer plate 200 and the second buffer plate 300 are all sleeved on the pin connecting end 430.

[0032] Furthermore, the first buffer plate 200 includes a first buffer plate body 210 of a square structure, a first square limiting hole 220 is formed in the middle of the first buffer plate body 210, and the first limiting hole 220 is inserted into the square limiting protrusion 420; the second buffer plate 300 includes a second buffer plate body 310 of a square structure, a second circular limiting hole 320 is formed in the middle of the second buffer plate body 310, and the second limiting hole 320 is sleeved on the pin connecting end 430. Through the cooperation of the first limiting hole 220 and the square limiting protrusion 420, the first buffer plate 200 and the metal sleeve 100 near the pin fixing end 410 are fixed by limiting, which facilitates installation while reducing relative displacement and wear.

[0033] Furthermore, a straight notch 131 is provided on the welding ring 130, and the straight notch 131 is communicated with the buffer groove 120. The design of the straight notch 131 reduces assembly errors and avoids the situation where assembly is impossible due to manufacturing size reasons.

[0034] Furthermore, when the nut 600 is used to lock the bushing 500 and the metal sleeve 100 , the gap d between the first buffer plate 200 and the second buffer plate 300 and the bottom of the corresponding buffer groove 120 is in the range of 1 mm<d<2 mm.

[0035] The above content is a further detailed description of the utility model in combination with specific implementation examples. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as belonging to the protection scope of the utility model.

[0036] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-trailer airbag bridge guide arm welding sleeve, characterized in that: The invention comprises two metal sleeves (100), the two metal sleeves (100) are respectively sleeved on the pin shaft (400), a bushing (500) for connecting the leaf spring ear is sleeved on the pin shaft (400), and the two metal sleeves (100) are respectively located at two ends of the bushing (500); a nut (600) is threadedly connected to one end of the pin shaft (400) for locking the bushing (500) and the metal sleeve (100); The metal sleeve (100) comprises a metal sleeve body (110), and a buffer groove (120) is provided on one side of the two metal sleeve bodies (110) separated from each other, and the diameter of the buffer groove (120) is continuously reduced along the inside of the groove, and a first buffer plate (200) and a second buffer plate (300) are respectively inserted into the two buffer grooves (120), and the pin shaft (400) passes through the center of the first buffer plate (200) and the second buffer plate (300), and the size of the first buffer plate (200) and the second buffer plate (300) matches the size of the buffer groove (120), and when the nut (600) locks the bushing (500) and the metal sleeve (100), there is a gap between the first buffer plate (200) and the second buffer plate (300) and the bottom of the corresponding buffer groove (120); A welding ring (130) is fixedly provided on one opposite side of the two metal sleeve bodies (110), the welding ring (130) is sleeved on the pin shaft (400), and the welding ring (130) is fixed to the airbag bridge guide arm by welding.

2. According to claim 1, a semi-trailer airbag bridge guide arm welding sleeve is characterized in that: The pin shaft (400) comprises a pin shaft fixing end (410) and a pin shaft connecting end (430) which are connected to each other; a square limiting protrusion (420) is fixedly provided at the center of a side of the pin shaft fixing end (410) close to the pin shaft connecting end (430); a threaded end (431) is provided at a side of the pin shaft connecting end (430) away from the pin shaft fixing end (410); the threaded end (431) is threadedly connected to a nut (600); and the bushing (500), the metal sleeve (100), the first buffer plate (200) and the second buffer plate (300) are all sleeved on the pin shaft connecting end (430).

3. According to claim 2, a semi-trailer airbag bridge guide arm welding sleeve is characterized in that: The first buffer plate (200) comprises a first buffer plate body (210) of a square structure, a first square limiting hole (220) is provided through the middle of the first buffer plate body (210), and the first limiting hole (220) is plugged into the square limiting protrusion (420); the second buffer plate (300) comprises a second buffer plate body (310) of a square structure, a second circular limiting hole (320) is provided through the middle of the second buffer plate body (310), and the second limiting hole (320) is sleeved on the pin shaft connection end (430).

4. According to claim 1, a semi-trailer airbag bridge guide arm welding sleeve is characterized in that: The welding ring (130) is provided with a straight notch (131), and the straight notch (131) is communicated with the buffer groove (120).

5. According to claim 1, a semi-trailer airbag bridge guide arm welding sleeve is characterized in that: When the nut (600) is used to lock the bushing (500) and the metal sleeve (100), the gap d between the first buffer plate (200) and the second buffer plate (300) and the bottom of the corresponding buffer groove (120) is in the range of 1 mm < d < 2 mm.

Images