Steel ball type expansion pin mechanism

Abstract

The utility model discloses a steel ball type expansion pin mechanism which comprises an air cylinder, a connecting seat, an expansion pin sleeve and a movable pin, the connecting seat is fixed on a cylinder body of the air cylinder, the expansion pin sleeve and the connecting seat are coaxially arranged, the movable pin is connected with a piston rod of the air cylinder, a pin body of the movable pin is fixedly matched with the connecting seat in a sliding mode, and a pin head of the movable pin is located in the expansion pin sleeve. A plurality of limiting through grooves are distributed in the cavity wall of the expansion pin sleeve, steel balls are arranged in the limiting through grooves, an expansion sliding sleeve is arranged between the steel balls and the pin head of the movable pin, steel ball limiting grooves are formed in the positions, corresponding to the steel balls, of the expansion sliding sleeve, and the expansion sliding sleeve is in slope sliding fit with the pin head of the movable pin; the steel balls are adopted to position the parts, the contact area with the parts can be reduced, and the parts on the tool can be separated conveniently; the positioning accuracy of the part is ensured by the uniformly distributed steel balls, so that the manufacturing quality is ensured; in order to limit the position of the steel ball, the designed tensioning sliding sleeve cannot move axially, and the problem that the movable pin is clamped is solved.

Description

Technical Field

[0001] The utility model belongs to the field of automobile parts processing and positioning, in particular to a steel ball-shaped sales mechanism. Background Art

[0002] In the process of processing automobile parts, it is generally necessary to position automobile axle tube parts. If one-piece positioning pins, round pins, diamond pins, etc. are used for positioning, the parts will be deformed due to heat after welding, which will cause these positioning methods to easily cause the problem of stuck parts, making it difficult to remove the parts; ordinary inclined wedge structure pins have low positioning accuracy and are prone to jamming during use. The cylinder cannot be smoothly extended and retracted, making it difficult to remove the parts.

[0003] Announcement No. CN219599304U discloses a sales-rising mechanism for positioning automobile parts, which has a relatively complex structure. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing positioning method is prone to problems of stuck parts or inaccurate positioning when positioning automobile parts. The utility model provides a steel ball-shaped sales mechanism.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a pin increasing mechanism in the form of a steel ball, comprising a cylinder, a connecting seat, a pin increasing sleeve, and a movable pin. The connecting seat is fixed on the cylinder body of the cylinder, the pin increasing sleeve and the connecting seat are coaxially arranged, the pin tail of the movable pin is connected to the piston rod of the cylinder through a movable joint, the pin body of the movable pin is fixedly slidably matched with the connecting seat, and the pin head of the movable pin is located in the pin increasing sleeve, which is characterized in that: a plurality of limiting grooves are distributed on the cavity wall of the pin increasing sleeve, steel balls are arranged in the limiting grooves, a tensioning sleeve is arranged between the steel balls and the pin head of the movable pin, a steel ball limiting groove is arranged on the tensioning sleeve corresponding to the steel balls, and the tensioning sleeve and the pin head of the movable pin are in an inclined sliding fit; the tensioning sleeve is composed of a plurality of tensioning sliders with the same petal shape.

[0006] The above technical solution is further limited in that the outer side surface of the movable pin head is a conical surface, and the inner side surface of the tensioning slider can fit with the outer side surface of the movable pin head.

[0007] The above technical solution is further improved in that a self-lubricating copper sleeve is provided between the connecting seat and the movable pin.

[0008] The above technical solution is further improved in that a gasket is provided between the connecting seat and the pin sleeve.

[0009] Beneficial effects: The utility model adopts steel balls to locate parts, which can reduce the contact area with the parts, help reduce friction loss, and facilitate separation from the parts on the tooling; the evenly distributed steel balls ensure the positioning accuracy of the parts, thereby ensuring the manufacturing quality; in order to limit the position of the steel balls, the designed tensioning sleeve cannot move axially, avoiding the problem of jamming of the movable pin, thereby avoiding the problem of jamming of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the utility model.

[0011] Figure 2 It is a stereogram of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1 and Figure 2 As shown, a pin-raising mechanism in the form of a steel ball comprises a cylinder 1, a connecting seat 2, a pin-raising sleeve 3, and a movable pin 4. The connecting seat is fixed on the cylinder body of the cylinder, the pin-raising sleeve and the connecting seat are coaxially arranged, the pin tail of the movable pin is connected to the piston rod of the cylinder through a movable joint 5, the pin body of the movable pin is fixedly slidably matched with the connecting seat, and the pin head of the movable pin is located in the pin-raising sleeve; a plurality of limiting grooves 6 are distributed on the cavity wall of the pin-raising sleeve, steel balls 7 are arranged in the limiting grooves, a tightening sleeve 8 is arranged between the steel balls and the pin head of the movable pin, and a steel ball limiting sleeve is arranged at the position corresponding to the steel balls on the tightening sleeve The steel ball limiting groove and the limiting through groove cooperate to limit the position of the steel ball, and also limit the tensioning sleeve from axial movement, so as to avoid the jamming problem of the movable pin; the tensioning sleeve and the movable pin head are inclined sliding cooperation; the outer side surface of the tensioning sleeve 7 is a cylindrical surface, and the inner side surface of the tensioning sleeve is a conical surface, which is composed of three tensioning sliders 801 of the same shape, and a gap is reserved between adjacent tensioning sliders; the arrangement of the three tensioning sliders can tighten the steel balls from multiple directions at the same time, so that the force on each steel ball is more uniform;

[0013] like Figure 1 and Figure 2 As shown, a self-lubricating copper sleeve 10 is provided between the connecting seat 2 and the movable pin 4; the self-lubricating copper sleeve can provide an upward supporting force to the pin sleeve, and the self-lubricating copper sleeve can keep the movable pin moving in the axial direction, and will not shake left and right during the extension and retraction of the cylinder;

[0014] like Figure 1 and Figure 2 As shown, a gasket 11 is provided between the connecting seat 2 and the pin-rising sleeve 3, and the connecting seat, the pin-rising sleeve and the gasket are fastened together by bolts, and the gasket has a buffering effect.

[0015] like Figure 1 and Figure 2As shown, the inclined surface sliding cooperation is further explained: the outer side surface of the pin head of the movable pin 4 is a conical surface, and the inner side surface of the tensioning slider 701 can fit with the outer side surface of the pin head of the movable pin; that is, the inner side surface of the tensioning slider is an arc-shaped groove, and the depth of the groove gradually increases from the pin head to the pin body; the inclined surface cooperation method can save the connectors between the parts, and is also convenient for later maintenance;

[0016] Instructions for use of the utility model: the pin-raising sleeve is inserted into the cavity of the pipe part, and the cylinder provides power. Since the connecting seat is fixedly connected to the cylinder body, the steel ball stuck in the limit groove will be limited in freedom in the circumferential direction. When the cylinder drives the movable pin to extend, the tensioning slider is pushed radially through the inclined surface, thereby tightening the steel ball in the limit groove. The spherical surface of the steel ball partially extends from the limit groove, forming multiple spherical protrusions on the surface of the pin-raising sleeve, thereby playing the role of fixing the parts; when the parts are processed, the cylinder piston rod contracts, the tensioning force disappears, and the steel ball retracts into the limit groove, which facilitates the separation of the pin-raising sleeve from the parts. When the steel ball is worn, automatic compensation is achieved by adjusting the tensioning force.

Claims

1. A pin-raising mechanism in the form of a steel ball, comprising a cylinder, a connecting seat, a pin-raising sleeve, and a movable pin, wherein the connecting seat is fixed on the cylinder body of the cylinder, the pin-raising sleeve and the connecting seat are coaxially arranged, the pin tail of the movable pin is connected to the piston rod of the cylinder through a movable joint, the pin body of the movable pin is fixedly slidably matched with the connecting seat, and the pin head of the movable pin is located in the pin-raising sleeve, characterized in that: There are multiple limit grooves distributed on the cavity wall of the pin expansion sleeve, and steel balls are arranged in the limit grooves. A tensioning sleeve is arranged between the steel balls and the pin head of the movable pin, and a steel ball limit groove is arranged on the tensioning sleeve corresponding to the steel balls. The tensioning sleeve and the pin head of the movable pin are in inclined sliding cooperation; the tensioning sleeve is composed of multiple tensioning sliders with the same petal shape.

2. According to claim 1, a steel ball type rising and selling mechanism is characterized in that: The outer side surface of the pin head of the movable pin is a conical surface, and the inner side surface of the tensioning slider can fit with the outer side surface of the pin head of the movable pin.

3. A steel ball-shaped sales mechanism according to claim 1 or 2, characterized in that: A self-lubricating copper sleeve is arranged between the connecting seat and the movable pin.

4. According to claim 3, a steel ball type lifting mechanism is characterized in that: A gasket is provided between the connecting seat and the pin sleeve.

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