A mechanism for automatically pressing and installing a piston retaining spring

Abstract

The present invention provides a mechanism for automatically pressing piston retaining rings, belonging to the field of press-fitting structures. The present invention includes a feeding structure, a horizontal pushing structure, a flipping structure, a vertical pushing structure and a press-fitting structure, wherein the feeding structure is used to convey the piston retaining ring to the mechanism through a feeding rod; the horizontal pushing structure is used to push the piston retaining ring on the mechanism horizontally onto the flipping mechanism; the flipping structure is used to flip the piston retaining ring for the vertical pushing mechanism to push the material; the vertical pushing structure is used to push the piston retaining ring onto the press-fitting structure; the front end of the press-fitting structure contacts the piston head, and the press-fitting structure is used to press the piston retaining ring into the retaining ring groove of the piston head. The beneficial effects of the present invention are: realizing automatic press-fitting of piston retaining rings, improving the press-fitting rhythm of retaining rings, and being able to meet the needs of the production line; and improving the press-fitting qualified rate of retaining rings.

Description

Technical Field

[0001] The invention relates to a press-fitting structure, in particular to a mechanism for automatically press-fitting a piston retaining spring. Background Art

[0002] At present, the piston circlip press-fitting method of the engine assembly line is manually pressed, and each time the piston head needs to be manually placed in the designated press-fitting position and press-fitted. The main defects of this structure are:

[0003] 1) Manual press-fitting of the retaining ring results in a waste of labor costs;

[0004] 2) The efficiency of manual pressing is low, which affects the production rhythm;

[0005] 3) There are safety risks when manual labor directly contacts the pressing mechanism;

[0006] 4) The qualified rate of piston retaining spring press-fitting is low. Summary of the invention

[0007] In order to solve the problems in the prior art, the present invention provides a mechanism for automatically pressing and installing piston retaining rings, thereby reducing labor waste, improving the retaining ring pressing rhythm, and improving the retaining ring pressing qualification rate; eliminating personnel safety risks.

[0008] The present invention comprises a feeding structure, a horizontal pushing structure, a flipping structure, a vertical pushing structure and a press-fitting structure, wherein the feeding structure is used to convey the piston retaining spring to the mechanism through a feeding rod;

[0009] The horizontal pushing structure is used to push the piston retaining ring on the mechanism horizontally onto the flipping mechanism;

[0010] The flipping structure is used to flip the piston retaining spring so that the vertical pushing structure can push the material;

[0011] The vertical pushing structure is used to push the piston retaining ring onto the press-fitting structure;

[0012] The front end of the press-fit structure contacts the piston head, and the press-fit structure is used to press the piston retaining spring into the retaining spring groove of the piston head.

[0013] The present invention is further improved, the feeding structure includes a feeding rod, a material base and a push-pull base, wherein a gap for accommodating the piston retaining spring is provided between the material base and the push-pull base, and a channel is also provided on the material base, the two ends of the channel are respectively connected to the feeding rod and the gap, and the piston retaining spring is transported to the gap through the feeding rod.

[0014] The present invention is further improved in that the push-pull base is further provided with a conveying channel connected to the gap, and the horizontal material pushing structure includes a push plate matched with the conveying channel and a first driving device for pushing the push plate to move horizontally.

[0015] The present invention is further improved in that the flipping mechanism includes a flipping cylinder and a rotating sleeve driven to rotate by the flipping cylinder.

[0016] The present invention is further improved, the flipping mechanism also includes a base, a rotating shaft and an adapter plate, the rotating shaft sleeve is provided with a sleeve portion and a flipping portion, the base is provided with a side wall, the sleeve portion is arranged between the side walls on both sides, the sleeve portion is sleeved on the rotating shaft and can rotate with the rotating shaft, the two sides of the rotating shaft are fixed to the side walls by bearings, the end of the rotating shaft is hinged to one end of the adapter plate, and the other end of the adapter plate is fixedly connected to the piston rod of the flipping cylinder.

[0017] The present invention is further improved, the flip part includes a horizontal plate arranged parallel to the base, and a baffle arranged perpendicular to the horizontal plate, the baffle and the socket part are respectively arranged at two ends of the horizontal plate, and six magnetic members are arranged in an array on the baffle.

[0018] The present invention is further improved, the vertical pushing structure includes a stopper, a vertical push piece and a second driving device for driving the vertical push piece to move vertically, the stopper is provided with a groove for the vertical movement of the vertical push piece, a first through hole is provided at the end of the vertical push piece, a second through hole of the same size as the first through hole is provided in the groove, and when the vertical push piece moves to the bottom, the first through hole and the second through hole are coaxially arranged.

[0019] The present invention is further improved in that the vertical push plate is provided with a first step whose plane is lower than the vertical push plate at the position of the first through hole, and a second step cooperating with the first step is provided in the groove. When the first step contacts and cooperates with the second step, the vertical push plate can radially compress the piston retaining spring and push it into the first through hole and the second through hole.

[0020] The present invention is further improved, and the press-fitting structure includes a third driving device, a tightening sleeve coaxially and of the same size as the second through hole, a pressure head capable of sliding relative to the tightening sleeve in the tightening sleeve, and a fourth driving device that drives the pressure head to press the piston retaining ring into the retaining ring groove of the piston head through the tightening sleeve. The tightening sleeve is fixed on the top surface of the block groove, and the third driving device is fixed under the block to drive the overall mechanism to move horizontally, so that the tightening sleeve and the piston head fit tightly.

[0021] The present invention is further improved, the stop block is also provided with a circular groove on the upper surface of the groove, which is connected to the groove and matches the shape of the tightening sleeve, one end of the tightening sleeve is fixed in the circular groove, and when the vertical push piece runs to the bottom, the first through hole, the second through hole and the tightening sleeve form a piston retaining spring pressing channel.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the work is optimized by one person per shift, saving 140,000 yuan in labor costs each year; the piston retaining ring is automatically pressed and installed, which improves the retaining ring pressing rhythm and can meet the needs of the production line; the retaining ring pressing qualification rate is improved and rework is reduced; and the safety risks during personnel operation are eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the feeding structure and the horizontal pushing structure;

[0025] Figure 3 It is a schematic diagram of the side structure of the feeding structure;

[0026] Figure 4 It is a schematic diagram of the structure of the flip structure;

[0027] Figure 5 It is a schematic diagram of the rotating sleeve structure;

[0028] Figure 6 It is a structural schematic diagram of a vertical pushing structure;

[0029] Figure 7 It is a schematic diagram of the cooperation between the vertical push piece and the stop block;

[0030] Figure 8 It is a schematic diagram of the vertical push piece structure;

[0031] Fig. 9 It is a schematic diagram of the block structure;

[0032] Fig.10 Structural diagram of the press-fit structure. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 As shown, the present invention includes a feeding structure, a horizontal pushing structure, a flipping structure, a vertical pushing structure and a pressing structure, wherein:

[0035] The feeding structure is used to deliver the piston retaining spring to the mechanism through the feeding rod;

[0036] The horizontal pushing structure is used to push the piston retaining ring on the mechanism horizontally onto the flipping mechanism;

[0037] The flipping structure is used to flip the piston retaining spring so that the vertical pushing structure can push the material;

[0038] The vertical pushing structure is used to push the piston retaining ring onto the press-fitting structure;

[0039] The front end of the press-fit structure contacts the piston head, and the press-fit structure is used to press the piston retaining spring into the retaining spring groove of the piston head.

[0040] like Figure 1-Figure 3 As shown, the feeding structure of this example includes a feeding rod 8, a material base 9 and a push-pull base 10, wherein a gap 101 for accommodating the piston retaining spring is provided between the material base 9 and the push-pull base 10, and a channel is also provided on the material base 9, and both ends of the channel 91 are respectively connected to the feeding rod 8 and the gap 101, and the piston retaining spring is transported to the gap 101 through the feeding rod 8. The height of the gap 101 is slightly greater than the thickness of the piston retaining spring.

[0041] The push-pull base of this example is also provided with a conveying channel connected to the gap 101. The horizontal pushing structure includes a push plate 11 cooperating with the conveying channel and a push cylinder 13 pushing the push plate 11 to move horizontally. The position of the push plate 11 is set corresponding to the conveying channel, and under the horizontal action of the push cylinder 13, the piston retaining ring can be pushed out from the gap 101 to the rotating structure.

[0042] like Figure 1 , Figure 4 and Figure 5 As shown, the flipping mechanism of this example includes a flipping cylinder 12 and a rotating sleeve 4 driven to rotate by the flipping cylinder 12. Of course, the flipping cylinder can be replaced by an electric motor arranged on the side of the rotating sleeve to directly drive the rotating sleeve 4 to flip 90 degrees.

[0043] As a preferred embodiment of this example, the flip mechanism of this example further includes a base 15, a rotating shaft and an adapter plate 16, the rotating shaft sleeve 4 is provided with a sleeve portion and a flip portion, the base 15 is provided with a side wall, the sleeve portion is provided between the side walls on both sides of the base 15, the inner wall is provided with a card slot, the sleeve portion is sleeved on the rotating shaft, and cooperates with the convex point on the rotating shaft to complete the card connection, and rotates with the rotating shaft, the two sides of the rotating shaft are fixed to the side wall by bearings, the end of the rotating shaft is hinged to one end of the adapter plate 16, and the other end of the adapter plate 16 is fixedly connected to the piston rod of the flip cylinder 12. The rotating shaft hinged to the adapter plate 16 is driven to rotate by the extension or retraction of the piston rod.

[0044] like Figure 5As shown, the flipping part includes a horizontal plate arranged parallel to the base, and a baffle arranged perpendicular to the horizontal plate, and the baffle and the sleeve part are arranged at both ends of the horizontal plate respectively. Six magnetic parts are arranged in an array on the baffle, and the magnetic parts can effectively ensure that the direction of the notch of the piston retaining spring does not change through the adsorption effect of the magnetic parts on the piston retaining spring. When the piston retaining spring is pushed onto the rotating sleeve by the push plate 11 of the push material pushing structure, it is blocked by the baffle, and then the baffle is flipped, so that the vertical push material pushing structure can transport the piston retaining spring to the next process.

[0045] like Figure 1 , Figure 6-Figure 9 As shown, the vertical pushing structure of this example includes a stopper 3, a vertical push piece 5 and a vertical pushing cylinder 6 for driving the vertical push piece 5 to move vertically, the stopper 3 is provided with a groove 31 for the vertical movement of the vertical push piece 5, the end of the vertical push piece 5 is provided with a first through hole 51, the groove 31 is provided with a second through hole 34 which is the same size as the first through hole 51, when the vertical push piece 5 moves to the bottom, the first through hole 51 is coaxially arranged with the second through hole 34.

[0046] Preferably, the vertical push piece 5 is provided with a first step 52 whose plane is lower than the vertical push piece at the position of the first through hole 51, and the groove 31 is provided with a second step 32 that cooperates with the first step 52. When the first step 51 contacts and cooperates with the second step 52, the vertical push piece 5 can radially compress the piston retaining ring and push it into the first through hole 51 and the second through hole 34.

[0047] On one side of the stopper 3 where the groove 31 is provided, a mounting structure 33 for mounting the press-fitting structure is also provided.

[0048] like Figure 1 , Fig.10 As shown, the press-fitting structure of this example includes a forward cylinder 7, a press-fitting cylinder 14, a tightening sleeve 2 coaxially arranged with the second through hole 34 and of the same size, a pressure head 1 that can slide relatively in the tightening sleeve 2 under the drive of the press-fitting cylinder 14, and the pressure head 1 presses the piston retaining spring into the retaining spring groove of the piston head through the retaining sleeve 2, and the mounting structure 33 is a circular groove matching the shape of the retaining sleeve, and a fixing screw hole is also provided inside the circular groove. When the vertical push piece 5 moves to the bottom, the first through hole 51, the second through hole 34 and the tightening sleeve 2 form a piston retaining spring press-fitting channel for the piston retaining spring to pass through.

[0049] The opening size of the tightening sleeve 2 in this example ensures that the retaining ring does not expand prematurely and crush the piston head. The coaxiality of the four circles of the tightening sleeve 2, the stopper 3, the vertical push piece 5, and the retaining ring pressure head ensures that there is no jamming during the process of pushing out the retaining ring.

[0050] The forward cylinder of this example is fixed below the stopper 3 to drive the entire mechanism to move horizontally, so that the tightening sleeve 2 fits tightly with the piston head, which facilitates the press-fitting of the piston retaining ring.

[0051] All cylinders in this example can be replaced by driving devices such as electric motors, hydraulic driving devices, etc.

[0052] The working principle of the present invention is:

[0053] The pushing cylinder 13 pushes a piston retaining ring from the push-pull base 10 to the rotating sleeve 4 through the horizontal pushing plate 11; the flipping cylinder 12 is actuated, and the rotating sleeve rotates 90 degrees; the vertical pushing cylinder 6 is actuated to push the piston retaining ring on the rotating sleeve 4 into the block 3 through the vertical pushing piece 5; the vertical pushing piece 5 and the block 3 both have a step, and the retaining ring is slightly compressed when the two come into contact; at this time, the tightening sleeve 2, the second through hole 34 on the block 3, and the first through hole 51 on the vertical pushing piece 5 are coaxial and of the same size, and the forward cylinder 7 drives the entire mechanism forward, and the tightening sleeve 2 fits tightly against the piston head; the pressing cylinder 14 drives the pressure head 1 to press the compressed piston retaining ring into the retaining ring groove of the piston head through the tightening sleeve 2; the cylinder action is controlled by the precise design of the above mechanical parts dimensions and the working logic, so that the retaining ring is automatically pressed on the assembly line.

[0054] The specific implementation modes described above are preferred implementation modes of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation modes, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims

1. A mechanism for automatically pressing a piston retaining ring, characterized in that: It includes a feeding structure, a horizontal pushing structure, a flipping structure, a vertical pushing structure and a pressing structure, among which: The feeding structure is used to deliver the piston retaining spring to the mechanism through the feeding rod; The horizontal pushing structure is used to push the piston retaining ring on the mechanism horizontally onto the flipping mechanism; The flipping structure is used to flip the piston retaining spring so that the vertical pushing structure can push the material; The vertical pushing structure is used to push the piston retaining ring onto the press-fitting structure; The front end of the press-fit structure contacts the piston head, and the press-fit structure is used to press the piston retaining spring into the retaining spring groove of the piston head. The flip mechanism includes a flip cylinder and a rotating sleeve driven to rotate by the flip cylinder. The vertical material pushing structure includes a stopper, a vertical push piece, and a second driving device for driving the vertical push piece to move vertically. The stopper is provided with a groove for the vertical push piece to move vertically. The end of the vertical push piece is provided with a first through hole. The groove is provided with a second through hole that is the same size as the first through hole. When the vertical push piece moves to the bottom, the first through hole is coaxially arranged with the second through hole. The vertical push plate is provided with a first step whose plane is lower than the vertical push plate at the position of the first through hole, and a second step cooperating with the first step is provided in the groove. When the first step contacts and cooperates with the second step, the vertical push plate can radially compress the piston retaining spring and push it into the first through hole and the second through hole.

2. The mechanism for automatically pressing and fitting a piston retaining ring according to claim 1, characterized in that: The feeding structure includes a feeding rod, a material base and a push-pull base, wherein a gap for accommodating the piston retaining spring is provided between the material base and the push-pull base, and a channel is also provided on the material base, and both ends of the channel are respectively connected to the feeding rod and the gap, and the piston retaining spring is transported to the gap through the feeding rod.

3. The mechanism for automatically pressing and fitting a piston retaining ring according to claim 2, characterized in that: The push-pull base is also provided with a conveying channel communicated with the gap, and the horizontal material pushing structure includes a push plate matched with the conveying channel and a first driving device for pushing the push plate to move horizontally.

4. The mechanism for automatically pressing and installing a piston retaining ring according to claim 1 is characterized in that: The flipping mechanism also includes a base, a rotating shaft and an adapter plate. The rotating shaft sleeve is provided with a sleeve portion and a flipping portion. The base is provided with a side wall. The sleeve portion is arranged between the side walls on both sides. The sleeve portion is sleeved on the rotating shaft and can rotate with the rotating shaft. Both sides of the rotating shaft are fixed to the side walls by bearings. The end of the rotating shaft is hinged to one end of the adapter plate, and the other end of the adapter plate is fixedly connected to the piston rod of the flipping cylinder.

5. The mechanism for automatically pressing and fitting a piston retaining ring according to claim 4 is characterized in that: The flip part includes a horizontal plate arranged parallel to the base, and a baffle arranged perpendicular to the horizontal plate. The baffle and the sleeve part are respectively arranged at two ends of the horizontal plate. Six magnetic members are arranged in an array on the baffle.

6. The mechanism for automatically pressing and fitting a piston retaining ring according to claim 1, characterized in that: The press-fitting structure includes a third driving device, a tightening sleeve coaxially arranged with the same size as the second through hole, a pressure head capable of sliding relative to the tightening sleeve in the tightening sleeve, and a fourth driving device that drives the pressure head to press the piston retaining ring into the retaining ring groove of the piston head through the tightening sleeve. The tightening sleeve is fixed on the top surface of the block groove, and the third driving device is fixed under the block to drive the overall mechanism to move horizontally, so that the tightening sleeve and the piston head fit tightly.

7. The mechanism for automatically pressing and fitting a piston retaining ring according to claim 6, characterized in that: The stopper is also provided with a circular groove on the upper surface of the groove, which is connected with the groove and matches the shape of the tightening sleeve. One end of the tightening sleeve is fixed in the circular groove. When the vertical push piece runs to the bottom, the first through hole, the second through hole and the tightening sleeve form a piston retaining spring pressing channel.

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