Piston pin inner hole and inner chamfer forming mechanism

Abstract

The utility model discloses a piston pin inner hole and inner chamfer forming mechanism which comprises a shifting mechanism, a clamp mechanism and a pressing and fixing mechanism, a fixing assembly structure for a piston pin is improved in the scheme, the clamp mechanism is matched with the pressing and fixing mechanism to fix the piston pin, and then hole cavity and chamfer forming and the like are carried out on the fixed piston pin. Feeding is conducted from the side initially, the first clamping block and the second clamping block are matched with the supporting block for clamping, in the clamp moving process of the shifting mechanism, the pressing rod abuts against the bottom face of the pressing plate and moves along the pressing plate, the pressing block is correspondingly moved downwards through the telescopic mechanism after the pressing rod moves to the preset position, and the two clamping blocks move oppositely through the V-shaped groove to complete fixing; the supporting block moves upwards to eject the clamping block so as to facilitate discharging, and indentations and the like of chamfers, orifice end faces and the like of piston pin machining caused by material ejection from the side are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pin processing devices, in particular to a piston pin inner hole and inner chamfer forming mechanism. Background Art

[0002] The piston pin processing process requires drilling, chamfering and other processes. To improve processing efficiency, some companies integrate the drilling mechanism and chamfering mechanism in the same position, and use the shift mechanism to move the fixture mechanism to move the clamped piston pin to the drilling mechanism and chamfering mechanism in turn. For the unloading of the piston pin on the fixture mechanism, the processed piston pin is generally ejected from the side, which can easily cause indentations on the end faces of the piston pin such as the chamfer that have just been processed, which needs to be improved. Utility Model Content

[0003] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0004] The present application document discloses a piston pin inner hole and inner chamfer forming mechanism, including a shifting mechanism, a clamping mechanism, a clamping mechanism is arranged at the moving end of the shifting mechanism, and also includes a pressing mechanism, the pressing mechanism includes a bracket, a telescopic mechanism, and a pressing block, the bracket is located on one side of the moving path of the clamping mechanism, the telescopic mechanism is arranged on the bracket part above the moving path of the clamping mechanism, and the pressing block is arranged at the moving end of the telescopic mechanism; the clamping mechanism includes a base, a clamping block 1, a clamping block 2, and a support block, the support block is elastically arranged on the base along the longitudinal direction, and the support block is formed The support block has an accommodating groove, and the bases on both sides of the support block are relatively elastically connected to clamp block 1 and clamp block 2. Clamp block 1 and clamp block 2 cooperate with the support block to pre-clamp the piston pin. After the shifting mechanism moves the clamp mechanism to a predetermined position, the telescopic mechanism moves the pressure block downward, and the V-groove on the bottom of the pressure block abuts against the corresponding positions of clamp block 1 and clamp block 2 to make the two move toward each other; a pressure rod is arranged at the end face of the support block and a pressure plate is arranged on one side of the moving path of the clamp mechanism, the end of the pressure rod is below the pressure plate and the pressure rod moves along the pressure plate, and the pressure plate is inclined upward at the end away from the bracket.

[0005] In the present scheme, the fixing component structure of the piston pin is improved, and the piston pin is fixed by a clamp mechanism in cooperation with a pressing mechanism, and then the cavity and chamfer of the fixed piston pin are formed, etc. Specifically, the material is initially loaded from the side, and the clamp block 1 and the clamp block 2 cooperate with the support block to clamp, and in the process of moving the clamp by the shifting mechanism, the pressure rod abuts the bottom surface of the pressure plate and moves along the pressure plate, and after moving to the predetermined position, the pressure block is moved downward accordingly by the telescopic mechanism, and the two clamp blocks are moved toward each other through the V-shaped groove to complete the fixation, and when the pressure rod moves to the inclined surface of the pressure plate, the support block moves up to push open the clamp block to facilitate material loading, thereby avoiding pushing the material from the side, which may cause indentations on the chamfers and hole end faces of the piston pin.

[0006] Furthermore, a groove is formed on the base and the lower part of the support block is in the groove cavity. An elastic member is arranged between the support block and the bottom of the groove cavity, which helps to guide the movement of the support block through the groove wall to improve stability.

[0007] Furthermore, fixed plates are respectively arranged on the bases on both sides of the support block, and clamp block 1 and clamp block 2 are respectively arranged between the fixed plate and the support block, and elastic member 2 is arranged between clamp block 1, clamp block 2 and adjacent fixed plates, so that the clamp blocks form an elastic connection under the action of elastic member 2.

[0008] Furthermore, arc grooves are provided at the opposite end surfaces of the clamping block 1 and the clamping block 2 to facilitate fitting to the peripheral wall of the piston pin, increase the contact area, and better fix the piston pin.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. The utility model fixes the piston pin with a clamp mechanism in cooperation with a pressing mechanism. When the pressing rod moves along the pressing plate to the inclined surface, the elastically connected support block moves upward to push open the clamp block, which is convenient for material unloading and avoids the side pushing material causing the chamfer of the piston pin end surface to produce indentations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the coordination structure of the clamp mechanism and the pressing mechanism in Example 1;

[0013] Figure 2 It is a schematic diagram of the coordination structure of the clamp mechanism and the pressing mechanism in Example 1;

[0014] Wherein, the accompanying drawings are marked as follows:

[0015] 1. Base; 2. Clamping block 1; 3. Clamping block 2; 4. Support block; 5. Elastic member 1; 6. Fixing plate; 7. Guide rod; 8. Guide cylinder; 9. Elastic member 2; 10. Pressing block; 11. Telescopic mechanism; 12. Bracket; 13. V-shaped groove; 14. Arc groove; 15. Straight section; 16. Inclined section; 17. Pressing rod. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] like Figure 1 , Figure 2 As shown, the piston pin inner hole and inner chamfer forming mechanism includes a shifting mechanism and a clamping mechanism. The shifting mechanism is a screw shifting type, and a drilling mechanism, a chamfering mechanism, etc. are installed on the side of the predetermined position of the shifting mechanism.

[0019] A clamp mechanism is installed at the moving end of the shift mechanism, and a pressing mechanism is added. For example, the pressing mechanism is installed at the sides of the drilling mechanism and the chamfering mechanism.

[0020] The pressing mechanism includes a bracket 12, a telescopic mechanism 11, and a pressure block 10. Taking the pressing mechanism at the side of the drilling mechanism as an example, the bracket 12 is fixed at the side of the drilling mechanism in the moving direction of the clamp mechanism. The horizontal end of the bracket 12 extends to the top of the moving path of the clamp mechanism and the telescopic mechanism 11, such as a cylinder, a liquid cylinder, etc., is installed longitudinally. The pressure block 10 is fixed at the moving end of the telescopic mechanism 11, and a V-shaped groove 13 is formed on the bottom surface of the pressure block 10.

[0021] The clamp mechanism includes a base 1, a clamping block 2, a clamping block 3, and a support block 4. The base 1 is fixed on the moving end of the shifting mechanism. A groove is formed in the middle of the base 1 and the lower part of the support block 4 is in the groove cavity. The lower peripheral wall of the support block 4 abuts against the groove cavity wall to guide the movement. An elastic member 5, such as a spring, is arranged between the bottom end of the support block 4 and the bottom wall of the groove to elastically move relative to the base in the longitudinal direction.

[0022] The top surface of the support block 4 is formed with a receiving groove, such as an arc groove, the axial direction of the arc groove is perpendicular to the moving direction of the clamp mechanism, the bases on both sides of the support block 4 are relatively installed with fixed plates 6, a clamp block 2 3 is set between the left fixed plate and the support block, and a clamp block 1 2 is set between the right fixed plate and the support block, and an arc groove 14 is formed at the end faces facing the two clamp blocks, and a guide cylinder 8 is fixed at the end faces facing each other of the two clamp blocks, and a guide rod 7 is installed on the corresponding fixed plate 6, and the end of the guide rod 7 is inserted into the cavity of the guide cylinder 8. A spring is sleeved on the guide rod, and the spring is an elastic member 2 9, and the two ends of the spring respectively abut the end faces of the fixed plate and the guide cylinder, so that the clamp block 1 and the clamp block 2 are elastically retracted relative to the base. Preferably, the end notches of the receiving groove and the notches of the arc grooves at the end faces of the clamp block 1 and the clamp block 2 are all flared to facilitate the insertion of the piston pin from the side.

[0023] In this example, a pressure plate is installed on the side of the shift mechanism, and a gap is reserved between the pressure plate and the mounting surface below. Figure 2 As shown, a pressure rod 17 is formed axially at the end face of the support block 4, and the pressure rod 17 is located in the gap between the pressure plate and the lower mounting surface. Under the upward movement of the elastic member 1, the pressure rod abuts against the bottom surface of the pressure plate, and during the movement of the shifting mechanism, the pressure rod moves along the pressure plate.

[0024] In this example, the pressing plate includes an inclined section 16 and a straight section 15. The inclined section 16 of the pressing plate is at a predetermined unloading station, and the straight section 15 of the pressing plate is at a drilling mechanism and a chamfering mechanism. The inclined section 16 of the pressing plate extends upward in an inclined manner. When in use, at the loading station, the pressing rod 17 abuts against the straight section 15 of the pressing plate, and the support block moves down to the limit. A forming limit block can be protruded in the groove cavity of the base, and the bottom surface of the support block abuts against the limit block to limit the downward movement. The piston pin is inserted into the cavity surrounded by the clamp block 1, the clamp block 2, and the support block from the side. The piston pin is clamped and fixed by the clamp block 1, the clamp block 2, and the support block, and then the shift mechanism moves the fixture forward to the drilling hole. At the mechanism and chamfering mechanism, the telescopic mechanism moves the pressure block downward, and the groove walls on both sides of the V-groove of the pressure block correspondingly abut against clamp block 1 and clamp block 2. In the process of the pressure block moving downward, clamp block 1 and clamp block 2 are moved toward each other to further clamp and fix the piston pin, and then the drilling mechanism, chamfering mechanism and the like are operated, and then the pressure block is reset, and the shifting mechanism moves the clamp mechanism to the unloading position, and the pressure rod moves to the inclined section of the pressure plate. Under the action of the elastic member 1, the pressure rod moves upward along the inclined section, and the support block moves upward to open clamp block 1 and clamp block 2, and then the clamping mechanism can clamp the peripheral wall of the piston pin for unloading to avoid pushing the material from the side, which may cause indentations on the chamfers and end faces of the orifice of the piston pin.

[0025] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A piston pin inner hole and inner chamfer forming mechanism, comprising a shifting mechanism and a clamping mechanism, wherein the clamping mechanism is arranged at the moving end of the shifting mechanism, and is characterized in that: The cam is an angular movement of the spring which is arranged on the side of the support frame, and the cam is arranged on the side of the support frame to move relative to the moving end of the cam.

2. The piston pin inner hole and inner chamfer forming mechanism according to claim 1, characterized in that: A groove is formed on the base and the lower part of the support block is in the groove cavity, and an elastic member 1 is arranged between the support block and the bottom of the groove cavity.

3. The piston pin inner hole and inner chamfer forming mechanism according to claim 1, characterized in that: Fixed plates are respectively arranged on the bases on both sides of the support block, a clamping block 1 and a clamping block 2 are respectively arranged between the fixed plate and the support block, and an elastic member 2 is arranged between the clamping block 1, the clamping block 2 and the adjacent fixed plates.

4. The piston pin inner hole and inner chamfer forming mechanism according to claim 1, characterized in that: Arc grooves are arranged at the opposite end surfaces of the clamping block 1 and the clamping block 2.

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