CN206123532U - Install assembly tool on plunger body with post piston ring - Google Patents

Abstract

The utility model relates to an install assembly tool on plunger body with post piston ring, including the base member that is round platform form, this base member top -down enlarges gradually and forms the conical body, and the diameter on the upper portion of this base member is less than post piston ring's internal diameter, and the diameter of this base member foot equals the external diameter of the plunger body, its characterized in that: still have on the terminal surface under the base member and supply plunger end of body male recess, have between the bottom of this recess and the lateral wall of this recess with plunger end of body chamfer assorted arc surface, insert at the plunger end of body under the state of this recess, the lateral wall of this recess just levelly and smoothly links up with plunger lateral wall physically mutually. During the assembly, after the plunger end of body inserts this recess, the sunk area appears no longer on the composition surface perisporium of the two to make post piston ring's slip all go on on a flat surface, make post piston ring can be smooth to the seal groove that reaches the plunger body in, the assembly is quick more, smoothly, thereby can improve assembly efficiency, reduction in production cost evidently.

Description

A kind of assembly fixture being installed to plunger ring on plunger body

Technical field

The utility model is related to a kind of tool, and more particularly to a kind of assembling being installed to plunger ring on plunger body is controlled Tool.

Background technology

Plunger body is an accessory in hydraulic motor, and the plunger body needs to be embedded in plunger bushing, the periphery of plunger body It is that liquid-tight envelope coordinates between face and the internal perisporium of plunger bushing.In order to not affect the liquid sealing effectiveness between plunger bushing and plunger body, The bonding strength between plunger bushing and housing is not interfered with simultaneously yet, and at present the liquid-tight envelope is by the sealing that is set on plunger body Plunger ring in groove is realizing.The plunger ring is assembled for convenience, and Chinese patent Authorization Notice No. is the text of CN202264195U A kind of simple structure, low cost are just disclosed in offering, and plunger ring faster can be reliably installed to assembling on plunger body and used Tool.

But in actual production, in order to remove corner edge burr, enter in the corner edge of plunger body 3 and apparatus 1 ' Gone chamfered, as depicted in figs. 1 and 2, when plunger body 3 and apparatus 1 ' is relative splice after, in the week of the two phase docking site Side just occur the matrix foot of sunk area 10, i.e. closet with diameter greater than or equal to the external diameter of plunger body, also because of post Cock body upper corner chamfering forms sunk area.Therefore when plunger ring 2 slides into the sunk area, because the restoring force of itself will In falling into the sunk area, now assembly crewman is difficult to transfer to the plunger ring from the sunk area, thus has to fill Carry out ressembling plunger ring after separating with apparatus and plunger body, therefore assembling can not be smoothed out, and cause efficiency of assembling low, And the plunger ring expanded repeatedly will reduction of service life, affect product quality, be unfavorable for the maintenance of product.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of simple structure for above-mentioned state of the art And the assembly fixture that more quickly successfully can be installed to plunger ring on plunger body.

The utility model solve the technical scheme that adopted of above-mentioned technical problem for：Plunger ring is installed to plunger body by one kind On assembly fixture, include in round table-like matrix, the matrix from top to bottom gradually expand and formed bullet, the matrix is most The diameter on top is less than the internal diameter of plunger ring, and the diameter of the matrix foot is equal to the external diameter of plunger body, it is characterised in that：It is described On matrix lower surface also have for plunger body end insertion groove, between the bottom of the groove and the side wall of the groove have with The arc surface that plunger body end-beveling matches, in the state of the groove is inserted in plunger body end, the side wall of the groove is just It is mutually smooth with the side wall of plunger body to be connected.

Be further improved on the basis of such scheme, the lower surface of described matrix by the bullet lower end Face down to extend and formed after one section of cylinder, the diameter of this section of cylinder is equal to the external diameter of plunger body, so that slide into cone The plunger ring of body lower end, with plunger body external diameter identical internal diameter under, then keep a period of time, to guarantee in the internal diameter It is lower successfully to slide on the outer surface of plunger body.

Shown by test, the height of the cylinder is 1 with the height ratio of bullet：14 are preferred, and now both can ensure that Plunger ring is successfully slided on plunger body, and the sliding time of plunger ring can be saved again, and with further raising effect is assembled.

In above-mentioned each scheme, the lower surface center position of described matrix also has to extend downwardly can be inserted into plunger body Inner chamber in insertion section, described groove is as around the cannelure of the insertion section.When so assembling, insertion section can be inserted In the inner chamber of plunger body, matrix is positioned, while allow matrix to be maintained at center position with plunger body, can more easily by post Plug ring is installed in the seal groove of plunger body.

It is preferred that the center of described matrix is provided with axial through hole, can so make matrix weight lighter, Er Qieneng Material saving, with reduces cost.

Compared with prior art, due to opening up fluted on matrix lower surface of the present utility model, and by bottom portion of groove with The arc surface matched with plunger body end is designed between recess sidewall, therefore after the groove is inserted in plunger body end, two No longer there is sunk area on the composition surface perisporium of person, so that the slip of plunger ring is all carried out on a flat surface, Plunger ring is just no longer snapped in the sunk area of plunger body and assembling tool connection gap so that plunger ring can smoothly reach post In the seal groove of cock body, assembling is more quick, smooth, so as to can significantly improve efficiency of assembling, reduces production cost.

Description of the drawings

Fig. 1 is assembling tool use state structural representation of the prior art；

Fig. 2 is the partial enlarged drawing in Fig. 2 at A；

Fig. 3 is the structural representation of the utility model embodiment；

Fig. 4 is the structural representation that the utility model embodiment installs plunger ring (plunger ring slides into matrix center)；

Fig. 5 is the partial enlarged drawing in Fig. 4 at B；

Fig. 6 be the utility model embodiment install plunger ring structural representation (plunger ring is installed to the position in seal groove Put).

Specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing embodiment.

As shown in Figures 3 to 6, the assembly fixture includes that in round table-like matrix 1 matrix 1 gradually expands from top to bottom And bullet is formed, the diameter d1 of the topmost of matrix 1 is less than the internal diameter d2 of plunger ring 2, and the diameter d3 of the foot of matrix 1 is equal to post The outside diameter d 4 of cock body 3.In the present embodiment, the matrix extends one section to also downward equal diameter on the basis of above-mentioned bullet Cylinder, i.e., the diameter of this section cylinder is equal to the outside diameter d 4 of plunger body 3, and the height H of the height h of the cylinder and bullet Than for 1：14.

Also having to extend downwardly in the lower surface center position of above-mentioned matrix 1 can be inserted in the inner chamber of plunger body 3 Insertion section 11, the center of matrix 1 is provided with axial through hole 12.Also have for the insertion of the end of plunger body 3 on the lower surface of matrix 1 Groove 13, the groove 13 as around the cannelure of the insertion section 11, between the bottom of the groove 13 and the side wall of the groove With the arc surface 14 matched with the end-beveling of plunger body 3, in the state of the groove 13 is inserted in the end of plunger body 3, this is recessed The side wall of groove 13 is just mutually smooth with the side wall of plunger body 3 to be connected, and refers to Fig. 4.

Use process of the present utility model is as follows：

As shown in figure 4, the insertion section 11 of tool is inserted in the inner chamber of plunger body 3, complete matrix 1 and plunger body 3 it Between relative positioning, the periphery of plunger body 3 has seal groove 31, is provided with sealing ring 4 in seal groove 31 in advance；Then by plunger Ring 2 puts down from the top of matrix 1, because matrix 1 gradually expands from top to bottom, therefore when plunger ring 2 is along the operation downwards of matrix 1 During, the internal diameter of plunger ring 2 is gradually expanded by matrix, continues firmly to push down on plunger ring 2, when plunger ring 2 moves to base During the lower position of body 1, i.e. when the internal diameter of plunger ring is expanded to the equal diameters with cylinder, due to the foot diameter of matrix D3 is equal to the outside diameter d 4 of plunger body, and the connecting portion surface of the two is more smooth, and plunger ring continues to move down and will smoothly move To plunger body, continue to move down plunger ring 2 to seal groove 31 position when, plunger ring 2 in the presence of natural resiliency restoring force, The internal diameter of plunger ring 2 diminishes and snaps in seal groove 31, as shown in fig. 6, the installation of plunger ring 2.

Claims (5)

1. a kind of assembly fixture being installed to plunger ring on plunger body, includes in round table-like matrix (1), the matrix (1) Gradually expand from top to bottom and form bullet, the diameter (d1) of matrix (1) topmost is less than the internal diameter of plunger ring (2) (d2), the diameter (d3) of matrix (1) foot is equal to the external diameter (d4) of plunger body (3), it is characterised in that：Described matrix (1) Also there is the groove (13) for the insertion of plunger body (3) end on lower surface, the bottom of the groove (13) and the side wall of the groove it Between there is the arc surface (14) that matches with plunger body (3) end-beveling, insert the shape of the groove (13) in plunger body (3) end Under state, the side wall of the groove (13) is just mutually smooth with the side wall of plunger body (3) to be connected.

2. the assembly fixture being installed to plunger ring on plunger body according to claim 1, it is characterised in that：Described matrix (1) lower surface is extended downwardly by the lower surface of the bullet and is formed after one section of cylinder, and the diameter of this section of cylinder is equal to The external diameter (d4) of plunger body (3).

3. the assembly fixture being installed to plunger ring on plunger body according to claim 2, it is characterised in that：The cylinder The height (h) of body is with the height (H) of bullet than being 1：14.

4. the assembly fixture being installed to plunger ring on plunger body according to claim 1 or 2 or 3, it is characterised in that：Institute State the lower surface center position of matrix (1) and also have and extend downwardly the insertion section that can be inserted in the inner chamber of plunger body (3) (11), described groove (13) is as around the cannelure of the insertion section (11).

5. the assembly fixture being installed to plunger ring on plunger body according to claim 4, it is characterised in that：Described matrix (1) center is provided with axial through hole (12).