CN215720321U - Universal joint - Google Patents

Abstract

The utility model provides a universal joint, wherein one end of the universal joint is provided with a locking head, and the locking head is provided with: an accommodation hole and a locking hole intersecting and communicating in an interior of the locking head; a locking member inserted in the locking hole and movable along the locking hole between a locking position and an unlocking position. The universal joint according to the utility model can not only be reliably locked with the component to be locked, but also be conveniently and quickly unlocked. Even if the pigment or the sizing material is adhered to the joint of the two, the pigment or the sizing material can be easily removed.

Description

Universal joint

Technical Field

The utility model relates to the technical field of mechanical transmission, in particular to a universal joint, and particularly relates to connection between the universal joint and a part to be locked.

Background

In engineering practice, universal joints are often used, which connect a component to a reducer, thus bringing the component together, which not only requires the connection between the universal joint and the component to be locked super-stable, but also requires the universal joint and the component to be able to be unlocked easily and quickly for easy replacement in routine maintenance. For example, in a paper machine such as a size press or a coater, a universal joint is required to connect a measuring rod and a speed reducer, one end of the universal joint is locked with the measuring rod, and the other end of the universal joint is connected with the speed reducer, so that the measuring rod is driven to reliably rotate together at high speed. Meanwhile, the metering rod is a quick-wear part and needs to be replaced frequently, so that the universal joint and the metering rod which need to be locked together can be unlocked conveniently and quickly, maintenance time is shortened, and production efficiency is improved.

In the prior art, one mode is to clamp a universal joint and a metering rod together in a mode of rotating for a certain angle and keep the clamping state by virtue of a spring piece, and the mode has the defects that after long-term use, the joint of the universal joint and the metering rod is easily clamped by pigment or sizing material, so that the universal joint and the metering rod are difficult to unlock; in addition, once the spring piece is broken and fails, the clamping state between the spring piece and the spring piece can be in a risk of being unlocked accidentally and disengaged. Another way is to rotate the gimbal to the metering rod and then lock with a locking screw. The disadvantage of this method is that an auxiliary tool is needed to disassemble and assemble the locking of the two, the locking screw hole is easily blocked, and the risk of disengagement due to accidental unlocking also exists.

Therefore, it is necessary to develop a universal joint which can avoid the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a universal joint, which can be reliably locked together with a part to be locked and can be unlocked conveniently and quickly.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a universal joint having a locking head at one end thereof, the locking head being provided with: an accommodation hole and a locking hole intersecting and communicating in an interior of the locking head; a locking member inserted in the locking hole and movable along the locking hole between a locking position and an unlocking position.

In one embodiment, the locking member includes a contact portion exposed to the locking hole, and when the contact portion is subjected to an external force, the locking member can move along a direction of the external force, and further move from one of the locking position and the unlocking position to the other of the locking position and the unlocking position.

In one embodiment, the locking member is provided with a resilient member to apply a force to the locking member to move from the locked position to the unlocked position.

In one embodiment, the locking member is an elongated structure having thick ends and a thin middle section, one thick end of the locking member is the contact portion, and the other thick end of the locking member is an engagement portion.

In one embodiment, one end of the intermediate section is integrally formed with the engagement portion, and the other end of the intermediate section is detachably connected to the contact portion; alternatively, both ends of the intermediate section are detachably connected to the engagement portion and the contact portion, respectively.

In one embodiment, the resilient member is a coil spring that is sleeved at the midsection and is retained at the midsection by the contact portion and the engagement portion stop.

In one embodiment, an intermediate portion of the locking hole is provided with a reduced-diameter hole which allows the intermediate section of the locking piece to pass through but does not allow the contact portion and the engagement portion, which are located on both sides of the reduced-diameter hole, and the coil spring to pass through; one end of the coil spring abuts against the end of the shrinkage hole, and the other end abuts against the contact portion.

In one embodiment, the locking hole is a through hole extending through the locking head.

In one embodiment, the contact portion and the engagement portion both form a clearance fit with the locking aperture.

In one embodiment, the extension direction of the receiving hole is orthogonal to the extension direction of the locking hole.

The universal joint has the advantages that the universal joint can be reliably locked with a part to be locked and can be conveniently and quickly unlocked, and even if pigment or glue is attached to the joint of the universal joint and the part to be locked, the universal joint can be easily removed. And the universal joint has simple structure and is easy to manufacture.

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model.

In the drawings:

fig. 1 shows a universal joint according to an embodiment of the utility model in a state of separation from the component to be locked.

Fig. 2 shows the joint of fig. 1 in a coupled state with the components to be locked.

Fig. 3 is a sectional view of a joint and a component to be locked in a locked state according to an embodiment of the utility model.

Fig. 4 is a sectional view of a joint and a component to be locked in an unlocked state according to an embodiment of the utility model.

Fig. 5 is a schematic view of the locking member shown in fig. 3.

Fig. 6 is a schematic view of a component to be locked according to another embodiment of the utility model.

Fig. 7 is a sectional view of a joint and a component to be locked in a locked state according to another embodiment of the utility model.

Fig. 8 is a sectional view of a universal joint and a component to be locked in an unlocked state according to another embodiment of the present invention.

List of reference numerals

10 locking head

11 receiving hole

12 locking hole

121 reduced hole

20 parts to be locked, metering sticks

21 insertion end

211 locking structure

30 locking piece

31 contact part

32 elastic member, coil spring

33 joint part

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, one end of the universal joint according to the present invention has a locking head 10, which is provided with a receiving hole 11 and a locking hole 12, wherein the locking hole 12 may be a blind hole or a through hole penetrating through the locking head 10. As shown in fig. 3 and 4, the receiving hole 11 and the locking hole 12 intersect and communicate inside the locking head 10. In the preferred embodiment shown in the figures, the direction of extension of the receiving hole 11 is orthogonal to the direction of extension of the locking hole 12. It should be understood that the directions of extension of the two may not be orthogonal.

The locking head 10 is also provided with a locking member 30 which is inserted in the locking hole 12 and is movable along the locking hole 12 between a locking position (see fig. 3) and an unlocking position (see fig. 4).

To facilitate the movement of the locking member 30 along the locking hole 12, the locking member 30 includes a contact portion 31 exposed to the locking hole 12. In the case where the contact portion 31 is subjected to a certain external force, such as pressing by hand, the locking member 30 can move in the direction of the external force, and thus move from one of the locking position and the unlocking position to the other thereof. In one embodiment, the contact portion 31 may be a button, and an external force may press the contact portion 31 so that the locking member 30 further enters the locking hole 12 to reach the locking position from the locking position. In another embodiment, the contact portion 31 may be a hook-shaped member or a ring-shaped member, and the external force may pull the contact portion 31 to partially withdraw the locking member 30 from the locking hole 12, in which case the locking member 30 may take the form of an elongated structure having any shape, such as a cylinder, a cone, etc.

Of course, in the case where the locking hole 12 is a through hole, the locking member 30 may not be provided with the contact portion 31 exposed to the locking hole 12, that is, the locking member 30 may be entirely inserted in the locking hole 12. At this time, the locking member 30 can be moved back and forth between the locking position and the unlocking position along the locking hole 12 by inserting other members (not shown) such as a push rod having a radial dimension smaller than that of the locking hole 12 into the locking hole 12 from both ports of the locking hole 12 and pushing the locking member 30. At this time, the locking member 30 may take the form of an elongated structure of any shape such as a cylinder, a cone, etc. It should be understood that, in the case that the locking hole 12 is a through hole, the locking member 30 may also be provided with a contact portion 31 exposed to the locking hole 12, so that the locking member 30 is moved by applying force to the contact portion 31 without using other members.

The present invention may also take other forms to move the locking member 30 along the locking hole 12. For example, the locking member 30 may be engaged with the locking hole 12 in a screw-type manner, and when the locking member 30 is rotated by means of the contact portion 31 or a separate screw driver or the like, the locking member 30 may be spirally moved back and forth along the locking hole 12 and stay at the locking position or the unlocking position. At this time, the locking member 30 may take the elongated configuration of a cylinder.

In the preferred embodiment shown in fig. 3, 4, 7 and 8, the locking member 30 may further be provided with a resilient member 32, and the resilient member 32 applies a force to the locking member 30 to move from the locking position to the unlocking position. The resilient member 32 may be a resilient member such as a spring, an air bag or a hydraulic mechanism, and when the locking member 30 is moved away from the locking position by an external force, the resilient member 32 will exert a force on the locking member 30 that tends to move the locking member 30 towards the locking position.

The elastic member 32 may be provided around the locking member 30 or may be provided at an end of the locking member 30.

The preferred embodiment in which the elastic member 32 is provided around the locking member 30 will be described in detail.

As shown in fig. 5, the locking member 30 has a long bar-shaped structure with thick ends and a thin middle section, one thick end of the locking member 30 is a contact portion 31, and the other thick end of the locking member 30 is an engagement portion 33. The engaging portion 33 is for engagement with a member to be locked 20 to be described later. One end of the intermediate section is integrally formed with the engagement portion 33, and the other end is detachably connected to the contact portion 31. Alternatively, both ends of the intermediate section are detachably connected to the engaging portion 33 and the contact portion 31, respectively. Wherein the detachable connection may take a variety of forms, such as a threaded connection or a pinned connection.

Both the contact portion 31 and the engagement portion 33 form a clearance fit with the locking hole 12, thereby allowing unobstructed axial movement of the locking member 30 in the locking hole 12 while avoiding undesired radial movement of the locking member 30 in the locking hole 12.

In the case where the locking member 30 is a long bar-shaped structure having thick ends and a thin middle section, the elastic member 32 is a coil spring, and the coil spring 32 is fitted over the middle section and is retained at the middle section by the contact portion 31 and the engaging portion 33, as shown in fig. 3 and 4.

In order to retain the locking member 30 within the locking hole 12, in a preferred embodiment, the middle portion of the locking hole 12 is provided with a reduced bore 121 that allows the middle section of the locking member 30 to pass through, but does not allow the contact portion 31 and the engagement portion 33 and the coil spring 32 to pass through, the contact portion 31 and the engagement portion 33 being located on either side of the bore 121. One end of the coil spring 32 abuts against the end of the constricted hole 121, and the other end abuts against the contact portion 31. Thus, the locking member 30 and the coil spring 32 cannot be freely moved toward the inside of the locking hole 12 nor can they be freely withdrawn from the locking hole 12 due to the blocking of the constricted hole 121.

In the preferred embodiment, the locking hole 12 is a through hole extending through the locking head 10 so that the locking member 30 is insert-mounted in the locking hole 12. Specifically, first, the engaging portion 33 of the lock member 30 is connected to one end of the intermediate section; then, the joined-together engaging portion 33 and the intermediate section are inserted into the locking hole 12 from the right-side port (see fig. 3 and 4) of the locking hole 12 with the intermediate section facing inward, and the intermediate section of the locking member 30 is passed through the keyhole 121 to the left side of the keyhole 121; then, inserting the coil spring 32 into the locking hole 12 from the left port of the locking hole 12, and sleeving the middle section of the locking piece 30, so that one end of the coil spring 32 abuts against the end of the hole 121; finally, the contact portion 31 of the lock member 30 is connected to the other end of the intermediate section, and the other end of the coil spring 32 is made to abut against the contact portion 31. Thus, the insertion installation of the locking member 30 in the locking hole 12 is completed. At this time, the locking member 30 is in the locking position.

However, the present invention is not limited thereto, and the locking member 30 may be held in the locking hole 12 in various ways. In another embodiment, the elastic member 32 may be provided at the end of the locking member 30, and the middle portion of the locking hole 12 may not be provided with the reduced-diameter hole 121. For example, the elastic member 32 has a first end fixed to the engaging portion 33 of the locking member 30 and a second end fixed to the inner wall of the locking hole 12 at a deeper position. Preferably, the second end of the elastic member 32 may have an externally threaded portion, and the inner wall deeper of the locking hole 12 may have a mating internal thread. First, the first end of the elastic member 32 is fixed to the engaging portion 33 of the locking member 30 by welding, screwing, or the like; then, the elastic member 32 and the locking member 30, which are coupled together, are inserted into the locking hole 12 from the left port of the locking hole 12 with the elastic member 32 facing inward until the externally threaded portion of the second end of the elastic member 32 reaches the position having the internal thread on the inner wall of the locking hole 12; then, the elastic member 32 can be driven to rotate by rotating the locking member 30, so that the external thread of the second end of the elastic member 32 is engaged with the internal thread on the inner wall of the locking hole 12, thereby fixing the second end of the elastic member 32 to the deeper inner wall of the locking hole 12. Thus, the locking member 30 cannot be freely moved toward the inside of the locking hole 12 nor can it be freely withdrawn from the locking hole 12 by means of the elastic member 32. In the preferred embodiment, the locking hole 12 may be a through hole or a blind hole; the elastic member 32 is not necessarily a coil spring, and may be other springs, air bags, hydraulic mechanisms, or the like.

As shown in fig. 3, 4, 7 and 8, when the contact portion 31 and the elastic member 32 are provided at the same time, the locking member 30 is in the locking position by the elastic member 31. When the user presses the pressing contact portion 31 with a finger, the locking member 30 moves away from the locking position against the urging force of the elastic member 31 until it moves to the unlocking position. Subsequently, when the user's finger leaves the contact portion 31, the locking member 30 moves to the locking position again by the urging force of the elastic member 31. Thus, the user can easily and quickly lock and unlock the locking head 10 of the universal joint.

In the following, it will be described how the joint according to the utility model is used in conjunction with the part 20 to be locked. For ease of description, the gimbal and metering bar in the size press of a paper machine apparatus are used herein as examples, and as shown, the component 20 to be locked is a metering bar. It should be understood, however, that the utility model is not so limited. For example, the member 20 to be locked does not have to be a shaft-like member such as a metering rod, and may be a member of any shape as long as the member 20 to be locked is provided with an insertion end 21 and the insertion end 21 can be inserted and mounted in the receiving hole 11 of the locking head 10 of the aforementioned universal joint.

In addition, since the metering rod 20 needs to rotate synchronously with the universal joint, the insertion end 21 of the metering rod 20 is a polygonal cylinder (e.g., a hexagonal cylinder as shown in fig. 1 and 3, 4) or a splined head (see fig. 6 to 8), while the receiving hole 11 of the universal joint is a polygonal hole (e.g., a hexagonal hole as shown in fig. 3 and 4) or a splined hole (see fig. 7 and 8) corresponding in shape and size thereto. However, the present invention is not limited thereto, and the locking head 10 and the member to be locked 20 may not necessarily be rotated in synchronization, that is, the locking head 10 and the metering rod 20 may be relatively rotated; also, the receiving hole 11 and the insertion end 21 may not correspond in shape and size.

The insertion end 21 is provided with a locking structure 211 for ensuring that the insertion end 21 is not accidentally removed from the receiving hole 11 after being inserted and installed in the receiving hole 11.

More specifically, in the case where the insertion end 21 of the metering rod 20 is mounted in the receiving hole 11 of the locking head 10 of the universal joint and the position of the locking structure 211 corresponds to the position of the locking hole 12 of the locking head 10, when the locking member 30 is in the locking position, the locking member 30 engages with the locking structure 211 on the insertion end 21, thereby preventing the insertion end 21 of the metering rod 20 from exiting the receiving hole 11 of the locking head 10; when the locking member 30 is in the unlocked position, the locking member 30 is disengaged from the locking structure 211 on the insertion end 21, thereby allowing the insertion end 21 of the metering rod 20 to exit the receiving bore 11 of the locking head 10. The engagement between the locking element 30 and the locking structure 211 on the insertion end 21 is most advantageous when the extension direction of the receiving hole 11 of the locking head 10 is orthogonal to the extension direction of the locking hole 12.

The locking structure 211 on the insertion end 21 can take a variety of forms.

For example, in the preferred embodiment shown in fig. 1, the locking structure 211 is a recess formed in the insertion end 21, and the locking member 30 is an elongated structure having thick ends and a thin middle section, one of the thick ends being the contact portion 31 and the other of the thick ends being the engaging portion 33 engaging the recess. When the locking member 30 is in the locking position, the engaging portion 33 of the locking member 30 is engaged into the groove (see fig. 3), thereby preventing the insertion end 21 from exiting the accommodation hole 11; when the locking member is in the unlocked position, the engagement portion 33 is forwardly disengaged from the recess, and the thinner intermediate section is dimensioned so as not to engage the recess (see fig. 4), thereby allowing the insertion end 21 of the metering rod 20 to exit the receiving bore 11.

For another example, in the preferred embodiment shown in fig. 6, the locking structure 211 is a step formed on the insertion end 21. When the locking member 30 is in the locking position, the engaging portion 33 of the locking member 30 blocks against the stepped portion, thereby preventing the insertion end 21 from exiting the accommodating hole 11; when the locking member 30 is in the unlocked position, the engagement portion 33 of the locking member 30 is forwardly disengaged from the stepped portion, and the thinner intermediate section is limited in size so as not to be able to block the stepped portion, thereby allowing the insertion end 21 to exit the accommodation hole 11.

It should be understood that the present invention is not limited thereto.

On the one hand, the locking member 30 does not have to be a long bar-shaped structure with thick ends and thin middle section, but may take other forms of structures, such as a column with uniform size, in which case, when it is desired to move the locking member 30 from the locking position to the unlocking position, an external force may be applied to the contact portion 31 exposed outside the locking hole 12 to pull the locking member 30 to partially withdraw from the locking hole 12 until the locking member 30 is disengaged from the groove, or when the locking hole 12 is a through hole, the locking member 30 may be pushed from another port of the locking hole 12 by a push rod or the like (not shown) to partially withdraw the locking member 30 from the locking hole 12 until the locking member 30 is disengaged from the groove.

On the other hand, the locking structure 211 may also take other types of structures, such as barbs or protrusions provided on the insertion end 21, as long as at least a portion of the locking member 30 can engage the structure to prevent the insertion end 21 from exiting the receiving hole 11 when the locking member 30 is moved to the locking position.

The joint according to the utility model has the following significant advantages compared to the structures of the prior art:

1. the universal joint and the part 20 to be locked are convenient and quick to lock and unlock, especially the universal joint and the metering rod, so that the time for replacing the metering rod on machine can be greatly shortened, the metering rod can be quickly replaced, and the starting efficiency of the paper machine is improved.

2. Since the receiving hole 11 and the locking hole 12 intersect and communicate with each other inside the locking head 10, so that the joint of the locking member 30 and the locking structure 211 is located inside the locking head 10 and away from the joint of the receiving hole 11 and the insertion end 21, the joint of the locking member 30 and the locking structure 211 is not easily contaminated by contaminants such as paint or glue, and even if paint or glue is attached, the locking member 30 can be easily removed by pressing, thereby avoiding the problem of difficulty in unlocking between the gimbal and the member to be locked 20.

The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. The description herein is intended to be illustrative, and not to limit the scope of the claims. Various alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to produce additional and/or alternative exemplary embodiments.

Claims (10)

1. A joint, characterized in that one end of the joint has a locking head (10) provided with:

a receiving hole (11) and a locking hole (12), the receiving hole (11) and the locking hole (12) intersecting and communicating inside the locking head (10);

a locking member (30) inserted in the locking hole (12) and movable along the locking hole (12) between a locked position and an unlocked position.

2. A joint according to claim 1, wherein the locking member (30) comprises a contact portion (31) exposed to the locking hole (12), and when the contact portion (31) is subjected to an external force, the locking member (30) is movable in a direction of the external force to move from one of the locking position and the unlocking position to the other of the locking position and the unlocking position.

3. A joint according to claim 2, wherein the locking member (30) is provided with a resilient member (32) to apply a force to the locking member (30) to move from the locked position to the unlocked position.

4. A joint according to claim 3, wherein the locking member (30) is an elongated structure having thick ends and a thin middle section, one thick end of the locking member (30) being the contact portion (31), and the other thick end of the locking member (30) being an engagement portion (33).

5. The joint according to claim 4, wherein one end of the intermediate section is integrally formed with the joint portion (33), and the other end of the intermediate section is detachably connected to the contact portion (31); alternatively, both ends of the intermediate section are detachably connected to the engagement section (33) and the contact section (31), respectively.

6. A joint according to claim 5, wherein the resilient member (32) is a coil spring which is sleeved at the intermediate section and retained at the intermediate section by the contact portion (31) and the engagement portion (33) stop.

7. The joint according to claim 6, wherein the intermediate portion of the locking hole (12) is provided with a reduced-diameter hole (121) which allows the intermediate section of the locking member (30) to pass through but does not allow the contact portion (31) and the engagement portion (33) and the coil spring to pass through, the contact portion (31) and the engagement portion (33) being located on both sides of the hole (121); one end of the spiral spring abuts against the end of the shrinkage hole (121), and the other end abuts against the contact part (31).

8. A joint according to claim 7, wherein the contact portion (31) and the engagement portion (33) both form a clearance fit with the locking bore (12).

9. A joint according to any of claims 1 to 8, wherein the locking hole (12) is a through hole through the locking head (10) and the receiving hole (11) is a hexagonal hole or a splined hole.

10. The joint according to any of claims 1 to 8, wherein the receiving bore (11) extends in a direction orthogonal to the direction of extension of the locking bore (12).

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