Lugless waveform clamp spring press-fitting protection structure

Abstract

The utility model discloses a lugless waveform clamp spring press-fitting protection structure and belongs to the technical field of automobile part assembly. The pressing device comprises a protective sleeve and a pressing head, the protective sleeve is of a cylinder structure with an inner cavity, the upper portion of the protective sleeve is a conical surface, the lower portion of the protective sleeve is a cylindrical surface, and the shape of the inner cavity of the protective sleeve corresponds to the shape of a matching part steering shaft before the matching part steering shaft is provided with an ear-free wave-shaped clamping spring in a pressing mode. The minimum diameter of the conical surface of the protective sleeve is smaller than the diameter of the lugless wave-shaped clamp spring before press-fitting assembly, and the outer diameter of the cylindrical surface of the protective sleeve is matched with the diameter of a bearing stand of a mating plate steering shaft before the lugless wave-shaped clamp spring is assembled in a clamp spring groove. The diameter of an inner cavity of the pressing head is larger than the diameter of the cylindrical face of the protective sleeve and smaller than the outer diameter of the lugless wave-shaped clamp spring after being pressed and expanded. The appearance of the mating plate steering shaft can be protected, the structure of the lugless wave-shaped clamp spring can be prevented from being deformed and clamped, the assembly efficiency is improved, and potential quality hazards are eliminated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts assembly, and concretely relates to an earless wave-shaped circlip press-fitting protection structure. BACKGROUND

[0002] The earless wave-shaped circlip is a specially designed circlip, is widely applied in mechanical assembly, is used for fixing the axial displacement of parts and can eliminate part of the axial clearance, and is commonly used in steering column assembly structures. The traditional ear circlip occupies extra space due to the protruding ear part, brings certain limitations and difficulties to installation and layout, the earless circlip has no protruding ear part, the cross sections are equal, the structure is compact, and the earless circlip can better adapt to the situation that the layout space is limited. However, the structure has great limitations in assembly, the traditional process directly sleeves the circlip on the steering shaft contour, press-fitting is carried out by using a sleeve, the steering shaft contour before the circlip groove has special structures such as threads, splines and conical surfaces, the earless wave-shaped circlip is deformed due to expansion during assembly, the two sharp points of the earless wave-shaped circlip are scratched on the contour of the counter part steering shaft due to pressure deformation during assembly, and the earless wave-shaped circlip is easily deformed and stuck due to the special steering shaft contour, so that the assembly efficiency is low and quality risks are great. CONTENT OF THE UTILITY MODEL

[0003] The utility model is just aimed at the above problems, makes up for the deficiency of prior art, and provides an earless wave-shaped circlip press-fitting protection structure. The utility model can protect the contour of the counter part steering shaft, prevent the earless wave-shaped circlip from being deformed and stuck, improve the assembly efficiency, and eliminate quality risks.

[0004] To achieve the above object, the utility model adopts the following technical scheme.

[0005] The utility model provides an earless wave-shaped circlip press-fitting protection structure, characterized by comprising a protection sleeve and a press head, the protection sleeve is a cylindrical structure with an inner cavity, the upper part of the protection sleeve is a conical surface, and the lower part is a cylindrical surface, the shape of the inner cavity of the protection sleeve corresponds to the contour of the counter part steering shaft before the earless wave-shaped circlip is press-fitted, the minimum diameter of the conical surface of the protection sleeve is smaller than the diameter of the earless wave-shaped circlip before press-fitting assembly, the outer diameter of the cylindrical surface is matched with the diameter of the bearing platform of the counter part steering shaft before the earless wave-shaped circlip is assembled in the circlip groove, the press head is a cylindrical structure with an inner cavity, the diameter of the inner cavity of the press head is greater than the diameter of the cylindrical surface of the protection sleeve and smaller than the outer diameter of the earless wave-shaped circlip after press-fitting expansion.

[0006] Further, the upper end surface of the press head bears the press-fitting force of the press-fitting equipment, the lower end surface is in contact with the end surface of the earless wave-shaped circlip, the earless wave-shaped circlip is pushed to the bearing platform position of the counter part steering shaft before the circlip groove is installed by the press head, and the assembly of the earless wave-shaped circlip is continued by press-fitting.

[0007] The utility model discloses the beneficial effect.

[0008] The utility model discloses can effectively isolate to the pair of parts steering axle and earless wave spring, effectively prevent the appearance damage of steering axle caused by earless wave spring press -fitting process deformation, guarantee the appearance quality, through the cooperation of protective sleeve and pressure head, the even pressure of circumferential direction is added to earless wave spring, and the press -fitting end surface of pressure head and earless wave spring end surface real -time contact, and earless wave spring inner wall along the real -time even expansion of protective sleeve, prevent earless wave spring deformation and jam, improve the assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to make the technical problem, technical scheme and beneficial effect solved by the utility model more clearly, the following is in combination with the specific embodiment, and the utility model is further detailed.The specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0010] Figure 1 It is the whole structure schematic diagram of the utility model.

[0011] Figure 2 It is the sectional effect drawing of the utility model and press -fitted earless wave spring to the pair of parts steering axle.

[0012] Figure 3 It is the structure schematic diagram of earless wave spring corresponding to the utility model.

[0013] Figure 4 It is the structure schematic diagram of the pair of parts steering axle corresponding to the utility model.

[0014] Marked in the drawing: 1 is protective sleeve, 2 is pressure head, 3 is taper, 4 is cylindrical surface, 5 is the pair of parts steering axle, 6 is earless wave spring, 7 is bearing platform, 8 is spring groove. DETAILED DESCRIPTION

[0015] In combination with the drawing shown, the embodiment provides an earless wave spring press -fitted protection structure, including protective sleeve 1 and pressure head 2, through the interaction of protective sleeve 1 and pressure head 2, press -fitted earless wave spring 6 to the spring groove 8 of the pair of parts steering axle 5.

[0016] Specific structure is, protective sleeve 1 is the cylindrical structure with inner cavity, the upper part of protective sleeve 1 is taper 3, can easily complete the range of earless wave spring 6 placement on taper 3, and the upper end face can increase the connecting structure in combination with the automatic press -fitting structure of automatic equipment;Lower cylindrical surface 4, the shape of the inner cavity of protective sleeve 1 corresponds the appearance before press -fitting earless wave spring 6 to the pair of parts steering axle 5, under the premise of guaranteeing tool intensity, the shape of inner cavity is not limited to the shape shown in the drawing.

[0017] The minimum diameter of the conical surface 3 of the protective sleeve 1 is smaller than the diameter of the earless wave spring 6 before being assembled, the outer diameter of the cylindrical surface 4 matches the diameter of the bearing seat 7 of the counterpart steering shaft 5 before the earless wave spring 6 is assembled in the spring groove 8, and the tolerance can be adjusted according to the actual allowable deformation of the earless wave spring 6.

[0018] The pressure head 2 is a cylindrical structure with an inner cavity, the diameter of the inner cavity of the pressure head 2 is larger than the diameter of the cylindrical surface 4 of the protective sleeve 1 and smaller than the outer diameter of the earless wave spring 6 after being expanded, which is the best specification for the fitting effect of the protective sleeve 1, neither affecting the assembly process nor ensuring the concentricity during the pressing process.

[0019] The upper end surface of the pressure head 2 bears the pressing force of the pressing equipment, which can meet the use strength of the tool pressing. The lower end surface realizes the maximum area contact with the earless wave spring 6 as much as possible, the earless wave spring 6 is pushed to the bearing seat 7 position of the counterpart steering shaft 5 before the spring groove 8 by the pressure head 2, and the assembly of the earless wave spring 6 is completed by continuing to press. Through the cooperation of the protective sleeve 1 and the pressure head 2, the earless wave spring 6 is uniformly pressed in the circumferential direction, the pressing end surface of the pressure head 2 is in real-time contact with the end surface of the earless wave spring 6, the inner wall of the earless wave spring 6 expands along the protective sleeve 1 in real time and uniformly, and the earless wave spring 6 is prevented from being deformed and stuck.

[0020] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical solutions described in the utility model embodiments, and those skilled in the art should understand that the utility model can still be modified or replaced equivalently to achieve the same technical effect, as long as it meets the use needs, it is within the protection scope of the utility model.

Claims

1. An earless wave spring press-fit protection structure, characterized in that, The application relates to a protective sleeve (1) and a pressing head (2), wherein the protective sleeve (1) is a cylindrical structure with an inner cavity; the upper part of the protective sleeve (1) is a conical surface (3), and the lower part is a cylindrical surface (4); the shape of the inner cavity of the protective sleeve (1) corresponds to the shape of a counterpart steering shaft (5) before a wave-shaped earless spring (6) is pressed and assembled; the minimum diameter of the conical surface (3) of the protective sleeve (1) is smaller than the diameter of the wave-shaped earless spring (6) before being assembled without being pressed; the outer diameter of the cylindrical surface (4) is matched with the diameter of a bearing platform (7) of the counterpart steering shaft (5) before the wave-shaped earless spring (6) is assembled in a spring groove (8); the pressing head (2) is a cylindrical structure with an inner cavity; the diameter of the inner cavity of the pressing head (2) is larger than the diameter of the cylindrical surface (4) of the protective sleeve (1) and smaller than the outer diameter of the wave-shaped earless spring (6) after being expanded and pressed.

2. The no ear wave spring press-in protection structure according to claim 1, wherein, The upper end surface of the pressing head (2) bears the pressing force of a pressing device, and the lower end surface is in contact with the end surface of the wave-shaped earless spring (6); the wave-shaped earless spring (6) is pushed to the position of the bearing platform (7) of the counterpart steering shaft (5) before the spring groove (8) is installed by pressing the pressing head (2); and the assembly of the wave-shaped earless spring (6) is completed by continuing to press.

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