Hand vise for installing annular elastic piece

Abstract

The invention discloses a hand vise for mounting an annular elastic piece, the hand vise is provided with a turntable capable of rotating when gripping force is applied to two vise handles, the turntable can drive each swinging support rod to spirally and radially expand, and the annular elastic piece is expanded by utilizing an arc-shaped support block at the lower end of each swinging support rod; the swing supporting rod is slidably sleeved with a discharging piece, the discharging piece is in linkage with the discharging disc, and when the swing supporting rod rotates to enable the annular elastic piece to be opened, the discharging piece rotates along with the swing supporting rod and drives the discharging disc to rotate. And an inclined plane matching structure is arranged between the base disc and the unloading disc, the inclined plane matching structure can enable the unloading disc to be far away from the base disc and drive all the unloading pieces to move downwards after the annular elastic pieces are expanded to a certain degree, and then the expanded annular elastic pieces are pushed out through pushing blocks at the lower ends of the unloading pieces. The annular elastic part can be expanded and pushed out to be arranged on the mounting shaft in a sleeving mode, the device has the advantages of being small and exquisite, portable and capable of saving labor, and the use experience is better.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical assembly, and particularly relates to a pair of pliers for installing an annular elastic member. Background Art

[0002] A radial expansion mechanism for an annular elastic member disclosed in CN119635568A can expand and push out the annular elastic member to be sleeved on an installation shaft, improving the installation efficiency of the annular elastic member. However, according to the operators' feedback, this radial expansion mechanism for the annular elastic member is laborious to use, and has a large size and a heavy weight. The reason lies in that: when the hand-pulling ring is lifted, each radial strut radially expands under the action of the parallelogram hinge structure, and each slider slides in the corresponding radial guide groove on the disc-shaped substrate, with a large frictional resistance; radial guide grooves are opened on the disc-shaped substrate, and the second connecting rod supports outward, and the third hinge support needs to be fixed outside the radial strut, so a relatively thick and large-diameter disc-shaped substrate needs to be configured, increasing the overall weight and size. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a pair of pliers for installing an annular elastic member that is small, light, and labor-saving.

[0004] Technical Solution: A pair of pliers for installing an annular elastic member of the present invention includes a base plate, a discharging plate, a central rod, a right plier handle, and a left plier handle;

[0005] The central rod has a pull rod section, a guide rod section, and a convex ring connected in sequence from top to bottom. The discharging plate is slidably sleeved on the guide rod section, and a support spring is installed between the discharging plate and the convex ring;

[0006] The base plate is fixed on the pull rod section. A turntable and a fastener are sequentially installed above the base plate, wherein the turntable is rotationally matched with the base plate, and the fastener is used for axially limiting the turntable; the turntable is fixedly connected to the front end of the right plier handle, and the fastener is fixedly connected to the front end of the left plier handle; a return spring is installed between the two plier handles;

[0007] A plurality of swing struts are uniformly arranged circumferentially between the base plate and the turntable. The swing strut has an arc section and a straight rod section connected perpendicularly, wherein the arc section is respectively hinged to the base plate and the turntable, and the straight rod section is located outside the base plate, and an arc-shaped support block is arranged at the lower end of the straight rod section;

[0008] A discharging member is arranged on each swing strut. The discharging member includes a conduit slidably sleeved on the straight rod section. A cross bar is vertically connected to the upper end of the conduit, and the cross bar is slidably inserted into a radial hole opened on the circumferential surface of the discharging plate. The number and position of the radial holes match the discharging members; a push block is fixedly arranged on the outer side of the lower end of the conduit;

[0009] When the two clamp handles approach each other, each swing support rod spirally opens radially, and each arc-shaped support block opens the annular elastic part, and at the same time each unloading part drives the unloading tray to rotate; an inclined surface matching structure is provided between the base plate and the unloading tray, and the inclined surface matching structure can make the unloading tray move away from the base plate when the unloading tray rotates, drive each unloading part downward, and then use each push block to push out the opened annular elastic part.

[0010] Furthermore, the inclined surface matching structure includes a plurality of first guide blocks evenly distributed along the circumferential direction on the lower surface of the base plate, and a plurality of second guide blocks evenly distributed along the circumferential direction on the upper surface of the discharge plate, and the number of the first and second guide blocks is equal; the first guide block has a first inclined surface, and the second guide block has a second inclined surface, and the first and second guide blocks are arranged alternately in a manner that the inclined surfaces are opposite to each other.

[0011] Furthermore, the first and second inclined surfaces have the same inclination angle.

[0012] Furthermore, the circumferential position of the second guide block on the discharge tray is adjustable to adapt to annular elastic members of different diameters.

[0013] Furthermore, a plurality of screw holes are distributed along the circumference on the upper surface of the discharge tray, and the circumferential position of the second guide block on the discharge tray is adjusted by using different screw holes.

[0014] Furthermore, each second guide block is fixed on a ring plate, an arc-shaped waist hole is opened on the ring plate or the discharge tray, and the ring plate and the discharge tray are fixed by bolts.

[0015] Furthermore, the second guide block is replaced by a roller so as to roll with the first inclined surface.

[0016] Furthermore, a plurality of first pin holes are evenly distributed along the circumference on the upper surface of the base plate, and the first pin shaft on the lower side of the arc segment is inserted into the corresponding first pin hole; a plurality of second pin holes are opened along the circumference on the turntable, and the second pin shaft at the upper end of the arc segment is inserted into the corresponding second pin hole.

[0017] Furthermore, a round guide column and a square column are coaxially arranged on the upper surface of the base, the square column is located above the round guide column, and the center hole of the base passes through the round guide column and the square column; the turntable is slidably sleeved on the round guide column, and the fastener has a square hole for plugging and matching with the square column; the upper end of the guide rod section has a shoulder surface, the pull rod section passes through the center hole, and the shoulder surface rests against the lower surface of the base; the end of the pull rod section is fixed to the base and the fastener with a nut.

[0018] Furthermore, the arc support block is hinged at the lower end of the straight rod section, and the inner arc surface of the push block is slidably matched with the outer arc surface of the arc support block, so that the outer arc surface of each arc support block can always be surrounded into a circle, which is convenient for contact with the annular elastic member.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0020] (1) Each swing strut expands outward in the form of rotation and swing. The swing strut is hinged with the base plate and the rotating plate, the friction resistance is small, and the clamp handle has a long lever arm, so the gripping force required to open the annular elastic member can be greatly reduced;

[0021] (2) The base plate has a smaller radial dimension and thickness, which reduces the overall weight and size;

[0022] The present invention can bring better use experience to operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a pair of pliers for installing an annular elastic member provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Exploded diagram of

[0025] Figure 3 It is a schematic diagram of the structure of the base plate and the discharge plate in an embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of a swing support rod and a discharge member in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Attached Figures 1 to 4 The reference numerals in the figures are as follows:

[0029] 1, base plate; 11, first pin hole; 12, round guide column; 13, square column; 14, center hole; 15, first guide block; 151, first inclined surface;

[0030] 2, discharge tray; 21, radial hole; 22, second guide block; 221, second inclined surface;

[0031] 3, swing support rod; 31, arc section; 32, first pin shaft; 33, second pin shaft; 34, straight rod section; 35, arc support block;

[0032] 4, unloading piece; 41, guide tube; 42, cross bar; 43, push block;

[0033] 5, center rod; 51, convex ring; 52, guide rod section; 53, pull rod section; 54, shoulder surface; 55, support spring; 56, nut;

[0034] 6, rotating disk; 61, second pin hole; 62, right clamp handle;

[0035] 7, left wrench; 71, fastener; 72, left pliers handle;

[0036] 8. Return spring

[0037] 9. Annular elastic member

[0038] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a pair of pliers for installing an annular elastic member, including a base plate 1, a blanking plate 2, a central rod 5, a turntable 6, a right plier handle 62, a fastener 71 and a left plier handle 72. The turntable 6 is fixedly connected to the front end of the right plier handle 62, the fastener 71 is fixedly connected to the front end of the left plier handle 72, and the fastener 71 and the left plier handle 72 form a left wrench 7

[0039] Combined with Figure 3 , 12 first pin holes 11 are circumferentially and evenly distributed along the edge of the end face of the base plate 1. A circular guide post 12 and a square post 13 are coaxially arranged on the upper surface of the base plate 1. The square post 13 is located above the circular guide post 12, and the central hole 14 of the base plate 1 penetrates through the circular guide post 12 and the square post 13

[0040] The blanking plate 2 has a through hole at the center, and 12 radial holes 21 are evenly distributed on its circumferential surface

[0041] The central rod 5 has a pull rod section 53, a guide rod section 52 and a convex ring 51 connected in sequence from top to bottom. The upper end of the guide rod section 52 has a shoulder surface 54. The blanking plate 2 is slidably sleeved on the guide rod section 52. The pull rod section 53 passes through the central hole 14, the shoulder surface 54 abuts against the lower surface of the base plate 1, and the top end of the pull rod section 53 is fixed by a nut 56. A support spring 55 is installed between the blanking plate 2 and the convex ring 51

[0042] The turntable 6 is slidably sleeved on the circular guide post 12 through the central hole thereon. The fastener 71 is inserted and matched with the square post 13 through the square hole at its center. The gasket under the nut 56 axially limits the fastener 71. A return spring 8 is installed between the two plier handles

[0043] A plurality of swing struts 3 are evenly arranged along the circumferential direction between the base plate 1 and the turntable 6. The swing strut 3 has an arc section 31 and a straight rod section 34 vertically connected. A first pin shaft 32 is fixed on the lower side of the arc section 31, and the first pin shaft 32 is inserted into the corresponding first pin hole 11. 12 second pin holes 61 are circumferentially formed on the end face of the turntable 6. A second pin shaft 33 is fixed at the upper side end of the arc section 31, and the second pin shaft 33 is inserted into the corresponding second pin hole 61. The straight rod section 34 is located outside the base plate 1, and an arc-shaped support block 35 is hinged at the lower end of the straight rod section 34. The outer arc surfaces of the arc-shaped support blocks 35 enclose a circle for expanding the annular elastic member 9

[0044] A discharging member 4 is provided on each swing strut 3. The discharging member 4 includes a conduit 41 slidably sleeved on the straight rod section 34. A cross bar 42 is vertically connected to the upper end of the conduit 41, and the cross bar 42 is slidably inserted into the corresponding radial hole 21. A pushing block 43 is fixed to the outer side of the lower end of the conduit 41, and the inner arc surface of the pushing block 43 is slidably matched with the outer arc surface of the arc-shaped supporting block 35. Under the guidance of the inner arc surface of the pushing block 43, the arc center direction of the arc-shaped supporting block 35 always faces the axis line of the base plate 1 and will not be skewed with the change of the angle of the arc-shaped section 31 at the top end of the swing strut 3. The outer arc surfaces of the arc-shaped supporting blocks 35 always enclose a circle.

[0045] A bevel surface matching structure is provided between the base plate 1 and the discharging plate 2. The bevel surface matching structure includes a first guide block 15 and a second guide block 22. The number of the first guide blocks 15 is three, which are evenly distributed along the circumferential direction on the lower surface of the base plate 1. Looking from bottom to top, a first bevel surface 151 is provided on the counterclockwise side of each first guide block 15. The number of the second guide blocks 22 is also three, which are evenly distributed along the circumferential direction on the upper surface of the discharging plate 2. Looking from top to bottom, a second bevel surface 221 is provided on the counterclockwise side of each second guide block 22. The first and second guide blocks are arranged alternately with their bevel surfaces facing each other, and the first and second bevel surfaces have the same inclination angle.

[0046] There is an initial distance between the first bevel surface 151 of the first guide block 15 and the second bevel surface 221 of the second guide block 22. During the radial expansion process of the annular elastic member 9, the swing strut 3 drives the discharging plate 2 to rotate counterclockwise through the discharging member 4. The first bevel surface 151 and the second bevel surface 221 gradually approach each other. As the annular elastic member 9 expands, the two bevel surfaces come into contact. Continuing to hold the pliers handle tightly, the annular elastic member 9 continues to expand radially, the discharging plate 2 further rotates counterclockwise, the two bevel surfaces slide relative to each other, so that the discharging plate 2 moves downward, driving the discharging member 4 to move downward, and the support spring 55 is compressed to store energy. The pushing block 43 pushes the annular elastic member 9 out of the arc-shaped supporting block 35 and sleeved onto the mounting shaft.

[0047] In this embodiment, the two bevel surfaces are in sliding contact with a large frictional resistance. In some embodiments, the second guide block 22 can be replaced with a roller, and the roller is in rolling contact with the first bevel surface 151, which can greatly reduce the frictional resistance.

[0048] Since the sizes of the annular elastic members 9 are different, in order to improve the applicability of the pliers so that it can expand annular elastic members 9 with different diameters, the circumferential position of the second guide block 22 on the discharging plate 2 is configured to be adjustable.

[0049] One implementation method is to provide a plurality of screw holes along the circumferential direction on the upper surface of the discharging plate 2, and connect the second guide block 22 and the discharging plate 2 through bolts, and adjust the circumferential position of the second guide block 22 on the discharging plate 2 by using different screw holes.

[0050] Another implementation method is to fix the roots of the second guide blocks 22 on a ring plate. An arc-shaped waist hole is opened on the ring plate, and a screw hole is opened on the discharge plate 2. The ring plate and the discharge plate 2 are fixed by bolts. By using the arc-shaped waist hole, the purpose of adjusting the circumferential position of the second guide block 22 on the discharge plate 2 can also be achieved. Of course, the arc-shaped waist hole can also be opened on the discharge plate 2, and a screw hole is opened on the ring plate, with the same effect.

[0051] The working principle of the present invention will be introduced below.

[0052] Gently hold the two pliers handles with one hand like holding a vise, move the lower end of the swing strut 3 to the position of the annular elastic member 9 to be installed, and insert the arc-shaped support blocks 35 into the annular elastic member 9.

[0053] Gradually tighten the pliers. The left pliers handle 72 and the right pliers handle 62 gradually approach each other. The turntable 6 rotates clockwise relative to the base plate 1, the arc-shaped swing rod 31 rotates counterclockwise around the first pin shaft 32, each swing strut 3 expands radially in a spiral manner, and each arc-shaped support block 35 gradually expands the annular elastic member 9. During this expansion process, the swing strut 3 drives the discharge plate 2 to rotate counterclockwise through the discharge member 4, and the two inclined surfaces gradually approach and contact. Since the initial position of the end of the push block 43 is relatively far from the annular elastic member 9, the annular elastic member 9 will not come out at this time.

[0054] Move the pliers with the annular elastic member 9 to the shaft end where the annular elastic member 9 is to be installed and align them.

[0055] Continue to tighten the pliers. The left pliers handle 72 and the right pliers handle 62 get closer further. The annular elastic member 9 expands further, the discharge plate 2 rotates counterclockwise further, the two inclined surfaces slide relative to each other, the discharge plate 2 moves downward, driving the discharge member 4 to move downward, and then the push block 43 pushes the annular elastic member 9 out of the arc-shaped support block 35 and slews it onto the installation shaft. At the same time, the support spring 55 is compressed to store energy.

[0056] Gradually loosen the pliers. The left pliers handle 72 and the right pliers handle 62 return to their original positions under the action of the return spring 8, the discharge member 4 returns to its original position under the action of the support spring 55, and each component returns to the initial state before expansion.

Claims

1. A pair of pliers for installing an annular elastic member, characterized in that It comprises a base plate (1), a discharge plate (2), a center rod (5), a right clamp handle (62) and a left clamp handle (72); The center rod (5) comprises a pull rod section (53), a guide rod section (52) and a convex ring (51) which are sequentially connected from top to bottom, the discharge tray (2) is slidably sleeved on the guide rod section (52), and a support spring (55) is installed between the discharge tray (2) and the convex ring (51); The base plate (1) is fixed on the pull rod section (53), and a rotating disk (6) and a fastener (71) are sequentially installed above the base plate (1), wherein the rotating disk (6) and the base plate (1) are rotationally matched, and the fastener (71) is used to axially limit the rotating disk (6); the rotating disk (6) is fixedly connected to the front end of the right clamp handle (62), and the fastener (71) is fixedly connected to the front end of the left clamp handle (72); a reset spring (8) is installed between the two clamp handles; A plurality of swing struts (3) are evenly arranged along the circumferential direction between the base plate (1) and the rotating disk (6), and the swing struts (3) have an arc segment (31) and a straight rod segment (34) which are vertically connected, wherein the arc segment (31) is hingedly connected to the base plate (1) and the rotating disk (6) respectively, and the straight rod segment (34) is located outside the base plate (1), and an arc support block (35) is arranged at the lower end of the straight rod segment (34); Each swing strut (3) is provided with a discharge piece (4), the discharge piece (4) comprising a guide tube (41) slidably sleeved on the straight rod section (34), the upper end of the guide tube (41) is vertically connected with a cross bar (42), the cross bar (42) is slidably inserted into radial holes (21) opened on the circumferential surface of the discharge plate (2), and the number and position of the radial holes (21) match the discharge piece (4); a push block (43) is fixed on the outer side of the lower end of the guide tube (41); When the two clamp handles are close to each other, each swing support rod (3) is radially opened spirally, and each arc-shaped support block (35) opens the annular elastic member (9), and at the same time each discharge member (4) drives the discharge tray (2) to rotate; an inclined surface matching structure is provided between the base plate (1) and the discharge tray (2), and the inclined surface matching structure can make the discharge tray (2) move away from the base plate (1) when the discharge tray (2) rotates, drive each discharge member (4) downward, and then use each push block (43) to push out the opened annular elastic member (9).

2. The pliers according to claim 1, characterized in that, The inclined surface matching structure comprises a plurality of first guide blocks (15) uniformly distributed along the circumferential direction on the lower surface of the base plate (1), and a plurality of second guide blocks (22) uniformly distributed along the circumferential direction on the upper surface of the discharge plate (2), wherein the number of the first and second guide blocks is equal; the first guide block (15) has a first inclined surface (151), the second guide block (22) has a second inclined surface (221), and the first and second guide blocks are arranged alternately in a manner that the inclined surfaces are opposite to each other.

3. The pliers according to claim 2, characterized in that, The first and second inclined surfaces have the same inclination angle.

4. The pliers according to claim 2, characterized in that, The circumferential position of the second guide block (22) on the discharge tray (2) is adjustable to fit annular elastic members (9) of different diameters.

5. The pliers according to claim 4, characterized in that, A plurality of screw holes are distributed along the circumference of the upper surface of the discharge tray (2), and the circumferential position of the second guide block (22) on the discharge tray (2) is adjusted by using different screw holes.

6. The pliers according to claim 4, characterized in that, Each second guide block (22) is fixed on a ring plate, an arc-shaped waist hole is opened on the ring plate or the discharge tray (2), and the ring plate and the discharge tray are fixed by bolts.

7. The pliers according to claim 2, characterized in that, The second guide block (22) is replaced by a roller so as to perform a rolling fit with the first inclined surface (151).

8. The pliers according to claim 1, characterized in that, A plurality of first pin holes (11) are circumferentially and uniformly distributed on the upper surface of the base plate (1), and the first pin shafts (32) on the lower side of the arc segment (31) are inserted into the corresponding first pin holes (11); a plurality of second pin holes (61) are formed in the turntable (6) along the circumferential direction, and the second pin shafts (33) at the upper side end of the arc segment (31) are inserted into the corresponding second pin holes (61).

9. The pliers according to claim 1, characterized in that, A circular guide post (12) and a square post (13) are coaxially arranged on the upper surface of the base plate (1), the square post (13) is located above the circular guide post (12), and the central hole (14) of the base plate (1) penetrates through the circular guide post (12) and the square post (13); the turntable (6) is slidably sleeved on the circular guide post (12), the fastener (71) has a square hole for plugging and matching with the square post (13); the upper end of the guide rod section (52) has a shoulder surface (54), the pull rod section (53) passes through the central hole (14), and the shoulder surface (54) abuts against the lower surface of the base plate (1); the end of the pull rod section (53) fixes the base plate (1) and the fastener (71) by using a nut (56).

10. The pliers according to claim 1, characterized in that, The arc-shaped support block (35) is hinged to the lower end of the straight rod section (34), and the inner arc surface of the push block (43) is slidably matched with the outer arc surface of the arc-shaped support block (35).

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