Snow nail capable of being quickly replaced and tire mold

Abstract

The utility model discloses a snow nail capable of being quickly replaced and a tire mold, which belong to the technical field of tire molds and comprise a shell and a snow nail core, one end of the snow nail core is positioned outside the shell, and the other end extends into the shell; in two circumferential surfaces, matched with the shell, of the snow nail core, one circumferential surface is provided with a convex pin key, and the other circumferential surface is provided with a concave groove; the groove comprises an axial extension part and a circumferential extension part, the circumferential extension part extends in the circumferential direction of the circumferential surface, the axial extension part extends in the axial direction of the circumferential surface, one end of the axial extension part is communicated with the circumferential extension part, and the other end of the axial extension part is opened in the end face of the snow nail core or the shell; the tire mold comprises a mold base body and the snow nail, a connecting hole is formed in the molding surface of the mold base body, and the shell is fixed in the connecting hole. The shell is fixed to a tire mold base body, and when the snow nail core is connected with the shell, only the snow nail core needs to be axially inserted into the shell and rotates by a certain angle. Connection is reliable, and disassembly and assembly are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire mould technical field, concretely relates to a quick replacement's snow spike and tire mould. BACKGROUND

[0002] In order to ensure the traffic safety of vehicle in snow or ice environment, it is usually necessary to install snow spike on tire to improve its performance on snow or ice surface. Some snow spikes on tire are integrally vulcanized and fixed with tire, and some are formed with snow spike mounting hole on tire, and then snow spike is assembled into snow spike mounting hole. Snow spike is arranged on tire mould, and snow spike mounting hole is formed by using snow spike in tire vulcanization process.

[0003] At present, snow spike on tire mould is directly cast on forming surface of mould or is processed with wire hole to cooperate and connect and fix with snow spike, is inconvenient to disassemble, and operation time is longer, and tire cost is increased, in addition, there is the risk of loosening and falling off of snow spike by wire hole connection. UTILITY MODEL CONTENTS

[0004] For the problems existing in the prior art, the utility model provides a quick replacement's snow spike and tire mould, and the snow spike is convenient to disassemble and will not loosen and fall off.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0006] The utility model provides a quick replacement's snow spike, including shell and snow spike core, one end of snow spike core is located at the outside of shell, and the other end extends into shell, the two circumferential surfaces of snow spike core and shell cooperate, one circumferential surface is equipped with the male key of external convex, and the other circumferential surface is equipped with the recess of internal concave, the recess includes axial extension part and circumferential extension part, the circumferential extension part extends in the circumferential direction of circumferential surface, the axial extension part extends in the axial direction of circumferential surface, one end communicates with circumferential extension part, and the other end is opened on the end face of snow spike core or shell.

[0007] When snow spike core and shell are connected, the male key slides into circumferential extension part from the opening of axial extension part until connected in place.

[0008] In the above-mentioned quick replacement's snow spike, the male key is fixed on the shell, and the recess is located on the snow spike core.

[0009] Or, the male key is fixed on the snow spike core, and the recess is located on the shell.

[0010] In the above-mentioned quick replacement's snow spike, the male key and the recess gap cooperate.

[0011] And / or, the number of pin keys is 1-5.

[0012] In the quick replacement snow spike, the snow spike core comprises a forming part and a connecting part, the connecting part is connected with the shell, and the forming part extends out of the shell.

[0013] In the quick replacement snow spike, the forming part comprises a first forming part and a second forming part connected in sequence, the first forming part is a sphere, the second forming part is a column, the first forming part and the second forming part are coaxial, and the outer diameter of the second forming part is smaller than that of the first forming part.

[0014] In the quick replacement snow spike, the outer diameter of the connecting part is greater than or equal to that of the second forming part.

[0015] In the quick replacement snow spike, the forming part further comprises a third forming part, the third forming part is a truncated cone, the small end of the third forming part is connected with the second forming part, and the large end of the third forming part is connected with the connecting part.

[0016] A tire mold comprises a mold base and the snow spike, a connecting hole is arranged on the forming surface of the mold base, and the shell is fixed in the connecting hole.

[0017] In the tire mold, the connecting hole is threadedly connected with the shell.

[0018] In the tire mold, the second end surface of the shell is connected with the forming surface.

[0019] The tire mold has the advantages that:

[0020] The shell and the snow spike core of the snow spike are matched by the pin key and the groove, the shell is fixed on the tire mold base, and when the snow spike core is connected with the shell, only the snow spike core needs to be axially inserted into the shell and rotated by a certain angle to complete the connection; the connection is reliable and convenient to disassemble and assemble;

[0021] The tire mold is convenient to maintain, has a long service life and low use cost. DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of an embodiment of the tire mold;

[0023] Figure 2 It is a connecting structure schematic view of the snow spike and the mold base in the tire mold;

[0024] Figure 3 It is a front view of the snow spike core in the first embodiment of the snow spike;

[0025] Figure 4 Figure 1 is a perspective view of a snow stud core according to a first embodiment of the present application;

[0026] Figure 5 Figure 2 is a perspective view of a snow stud shell according to the first embodiment of the present application;

[0027] Figure 6 Figure 3 is a top view of the snow stud shell according to the first embodiment of the present application;

[0028] Figure 7 Figure 4 is an exploded view of a snow stud according to a second embodiment of the present application;

[0029] In the drawings:

[0030] 100 - mold base; 101 - connecting hole; 102 - forming surface;

[0031] 200 - shell; 201 - first end surface; 202 - second end surface;

[0032] 300 - snow stud core; 301 - first forming portion; 302 - second forming portion; 303 - third forming portion; 304 - connecting portion;

[0033] 400 - pin key;

[0034] 500 - groove; 501 - axial extension; 502 - circumferential extension. DETAILED DESCRIPTION

[0035] For the convenience of those skilled in the art, the present application will be further described below in conjunction with the drawings.

[0036] Referring to Figure 1 and Figure 2 A tire mold includes a mold base 100 and a snow stud. The mold base 100 has a connecting hole 101 formed in a forming surface 102 thereof, and the snow stud is fixed in the connecting hole 101. The snow stud includes a shell 200 and a snow stud core 300. The shell 200 is fixedly connected to the connecting hole 101. For example, the outer wall of the shell 200 and the inner wall of the connecting hole 101 are both formed with threads, and the shell 200 is fastened in the connecting hole 101 by screwing. Alternatively, the shell 200 can be fastened to the mold base 100 by casting. The snow stud core 300 extends axially into the shell 200 at one end and extends out of the shell 200 at the other end. The two circumferential surfaces of the shell 200 and the snow stud core 300 are provided with a male pin key 400 on one of the circumferential surfaces and a female groove 500 on the other of the circumferential surfaces, and the pin key 400 and the groove 500 are engaged to connect the shell 200 and the snow stud core 300.

[0037] As Figure 3 and Figure 4As shown, the snow spike core 300 comprises a forming part for forming the snow spike mounting hole and a connecting part 304 for connecting the shell 200. The shape of the forming part can be designed according to the snow spike mounting hole; preferably, the forming part comprises a first forming part 301 and a second forming part 302, exemplarily, the first forming part 301 is a sphere and the second forming part 302 is a cylinder, the first forming part 301 and the second forming part 302 are coaxially connected and the outer diameter of the second forming part 302 is smaller than that of the first forming part 301.

[0038] The outer diameter of the connecting part 304 is greater than or equal to that of the second forming part 302; preferably, the outer diameter of the connecting part 304 is greater than that of the second forming part 302, and the forming part further comprises a third forming part 303; the third forming part 303 is a truncated cone, the large end of the third forming part 303 is connected to the connecting part 304, and the small end is connected to the second forming part 302. The snow spike core 300 has a structure of thick at both ends and thin in the middle, and the formed snow spike mounting hole also has a structure of thick at both ends and thin in the middle, which is beneficial to the stability and reliability of the snow spike installation on the tire.

[0039] The connecting part 304 of the snow spike core 300 is located in the shell 200 and is detachably connected to the shell 200.

[0040] As the first embodiment of the snow spike, as shown in the figure, Figures 3-6 The pin key 400 extends in the radial direction of the shell 200, one end of which is fixedly connected to the shell 200, and the other end extends into the inner cavity of the shell 200. Specifically, a through hole extending in the radial direction is processed on the shell 200, and the number of the through hole is the same as that of the pin key 400. One end of the pin key 400 is a fixed end, and the other end is a clamping end; the fixed end extends into the through hole and is in interference fit, realizing the fixed connection of the pin key 400 and the shell 200; the clamping end is preferably a spherical surface, which is in sliding contact with the groove 500 without clamping. The pin key 400 can be a cylinder, a cuboid, or any other shape, which can cooperate with the groove 500 to limit the snow spike core 300. The number of pin keys 400 is preferably 1-5, and they are preferably uniformly distributed in the circumferential direction of the shell 200.

[0041] The groove 500 is arranged on the outer surface of the connecting part 304, and the groove 500 comprises an axial extension part 501 and a circumferential extension part 502. The axial extension part 501 is opened on the end face of the connecting part 304 away from the third forming part 303, and extends axially into the snow spike core 300 from the end face; the circumferential extension part 502 is in communication with the axial extension part 501 and extends in the circumferential direction; the communication between the axial extension part 501 and the circumferential extension part 502 is L-shaped or T-shaped.

[0042] The pin key 400 is in clearance fit with the groove 500, that is, the clamping end of the pin key 400 is in sliding contact or has a certain clearance with the groove bottom of the groove 500, and the peripheral side of the pin key 400 is in sliding contact or has a certain clearance with the two side walls of the groove 500. When assembling, the axial extension 501 on the snow spike core 300 is aligned with the pin key 400 on the shell 200, and the snow spike core 300 is axially inserted into the shell 200. When the snow spike core 300 cannot continue to move axially, the snow spike core 300 is axially moved into position. At this time, the position of the circumferential extension 502 corresponds to the pin key 400; then, the snow spike core 300 is rotated by a certain angle, so that the pin key 400 enters the circumferential extension 502. It can be determined that the snow spike core 300 and the shell 200 are connected in place when an outward pulling force is applied to the snow spike core 300 in the axial direction but the snow spike core 300 does not produce axial displacement. It should be noted that, since the circumferential extension 502 has a certain length in the circumferential direction, the pin key 400 can axially limit the connection of the snow spike core 300 and the shell 200 at any position in the circumferential extension 502. However, it can be understood that the greater the distance between the pin key 400 and the axial extension 501, the higher the reliability of the connection of the snow spike core 300 and the shell 200. Therefore, it is preferred that the assembly is completed when the snow spike core 300 cannot continue to rotate, and at this time the pin key 400 is located at the end of the circumferential extension 502 away from the axial extension 501. The pin key 400 and the circumferential extension 502 cooperate to limit the axial movement of the snow spike core 300, and the two peripheral surfaces of the connecting portion 304 and the shell 200 are in close contact, thereby firmly installing the snow spike core 300 on the mold base 100. The snow spike is convenient to install and disassemble. When the tire mold is vulcanized, if the snow spike core 300 is damaged, it can be quickly and simply replaced by rotating the snow spike core 300 and pulling it out. This can effectively reduce the problem of downtime of the vulcanizing machine caused by replacement of the snow spike core 300.

[0043] The shell 200 has a first end face 201 and a second end face 202, wherein the first end face 201 is located in the connecting hole 101, and the second end face 202 is connected with the forming surface 102 and smoothly transitions. After the snow spike core 300 and the shell 200 are assembled, the outer side surface of the third forming portion 303 is connected with the second end face 202. The snow spike mounting hole structure of the tire mold of the present application is reasonable, the opening end of the snow spike mounting hole is trumpet-shaped, which facilitates the installation of the snow spike on the tire and does not cause damage to the tire.

[0044] As a second embodiment of the snow spike, as shown in Figure 7 different from the first embodiment, the pin key 400 is fixed on the outer peripheral surface of the connecting portion 304, and the groove 500 is located on the inner peripheral surface of the shell 200. The axial extension 501 of the groove 500 is opened on the second end face 202 and then extends axially into the interior of the shell 200 and communicates with the circumferential extension 502.

[0045] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-change snow spike, characterized in that, The device includes a housing (200) and a stud core (300); one end of the stud core (300) is located outside the housing (200), and the other end extends into the housing (200); among the two circumferential surfaces on which the stud core (300) mates with the housing (200), one circumferential surface is provided with a protruding key (400), and the other circumferential surface is provided with a recessed groove (500); the groove (500) includes an axial extension (501) and a circumferential extension (502), the circumferential extension (502) extends circumferentially on the circumferential surface, the axial extension (501) extends axially on the circumferential surface, one end of the axial extension (501) is connected to the circumferential extension (502), and the other end is open on the end face of the stud core (300) or the housing (200); When the snow spike core (300) is connected to the housing (200), the key (400) slides from the opening of the axial extension (501) into the circumferential extension (502) until it is connected in place.

2. The quick-change snow spikes according to claim 1, characterized in that, The pin (400) is fixed on the outer shell (200), and the groove (500) is located on the snow nail core (300); Alternatively, the pin (400) is fixed on the snow nail core (300), and the groove (500) is located on the outer shell (200).

3. The quick-change snow spikes according to claim 1, characterized in that, The key (400) and the groove (500) are in clearance fit; And / or, the number of the pins (400) is 1 to 5.

4. A quick-change snow spike according to any one of claims 1-3, characterized in that, The snow stud core (300) includes a forming part and a connecting part (304), the connecting part (304) is connected to the outer shell (200), and the forming part extends out of the outer shell (200).

5. A quick-change snow spike according to claim 4, characterized in that, The molding part includes a first molding part (301) and a second molding part (302) connected in sequence; the first molding part (301) is a sphere, the second molding part (302) is a column, the first molding part (301) and the second molding part (302) are coaxial and the outer diameter of the second molding part (302) is smaller than the outer diameter of the first molding part (301).

6. A quick-change snow spike according to claim 5, characterized in that, The outer diameter of the connecting part (304) is greater than or equal to the outer diameter of the second forming part (302).

7. A quick-change snow spike according to claim 5, characterized in that, The molding part further includes a third molding part (303), which is a frustum. The small end of the third molding part (303) is connected to the second molding part (302), and the large end is connected to the connecting part (304).

8. A tire mold, characterized in that, The device includes a mold base (100) and snow nails as described in any one of claims 1-7, wherein the molding surface (102) of the mold base (100) is provided with a connecting hole (101), and the outer shell (200) is fixed in the connecting hole (101).

9. A tire mold according to claim 8, characterized in that, The connecting hole (101) is threadedly connected to the outer casing (200).

10. A tire mold according to claim 8, characterized in that, The second end face (202) of the outer shell (200) is connected to the molded surface (102).

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