CN219705004U - Quick-dismantling structure of connecting rod - Google Patents

Abstract

The utility model discloses a quick-dismantling structure of a connecting rod, which comprises the following components: a rocker, a joint, a pin, a mandrel and a steel ball. Two expansion holes are formed in one ball head of the rocker, and the narrow ends of the two expansion holes are connected in opposite directions to form a long hole in the center of the inner part of the ball head. The mandrel and the steel ball are arranged in the joint, and the mandrel pushes the steel ball to partially expose the joint. The pin passes through the long hole of the rocker and the joint, so that the ball head is put into a round groove of the joint to swing mutually. The pin maintains a distance to one end of the long hole, and allows the rocker to move linearly for a stroke, so that the mandrel does not drive the steel ball to expose out of the joint, and the connecting rod is helped to be quickly combined with a spark plug sleeve to be detachable.

Description

Quick-dismantling structure of connecting rod

Technical Field

The utility model relates to the field of hand tools, in particular to a connecting rod, which is suitable for installing a spark plug on a common vehicle or detaching the spark plug from the vehicle.

Background

Vehicles that generate kinetic energy from fuel (e.g., gasoline, diesel, or lpg) typically have an engine. By means of screw locking, the engine is provided with more than one spark plug. A handle tool locks or unscrews the spark plug so that the tool is referred to as a spark plug socket wrench or socket wrench.

The utility model patent application of China No. 2618731Y discloses that the sparking plug sleeve wrench is a T-shaped structure body, one end of an operating rod is combined by a transverse handle, the other end of the operating rod is connected to a sleeve, and the sparking plug is special for the sleeve with single specification. Different sizes of spark plugs, the proper sleeve must be replaced. The sleeve and the operating rod are integrated, and a user often needs to prepare more than two spark plug sleeve wrenches to replace proper hand tools at any time so as to cope with the installation or the disassembly of a spark plug. However, the number of the spark plug sleeve wrench increases the manufacturing cost, and also increases the load, which is disadvantageous to carry.

The utility model of China patent No. 2707436Y discloses a socket wrench which is provided with an upper pivot shaft and a lower pivot shaft, wherein the lower pivot shaft connects a sleeve and a universal connecting rod together, and the upper pivot shaft connects the universal connecting rod and a handle together. The upper pivot shaft and the lower pivot shaft are implemented by rivets, because the rivets are unfavorable for replacement, the sleeve and the universal connecting rod are connected with the handle and are difficult to replace, the limiting condition of a single-specification spark plug special for the sleeve exists, and a plurality of sleeve wrenches still need to be prepared to cope with the installation or the disassembly of the spark plugs with different specifications, so the manufacturing cost is still expensive, the load is not lightened, and the carrying is unfavorable.

Therefore, how to reduce the load of carrying and to improve the disadvantages of high manufacturing cost, etc. is a problem to be solved in the present utility model.

Disclosure of Invention

The utility model mainly aims to provide a quick-dismantling structure of a connecting rod, which is based on the installation or dismantling of a spark plug, adopts a combined structure, and besides the fact that a rocker is connected to a joint to swing each other, the rocker has the function of quick dismantling, helps the joint to combine with a needed spark plug sleeve, and effectively solves the defects of heavy load, inconvenient carrying, high manufacturing cost and the like in the prior art.

In order to achieve the purpose of quick disassembly, the connecting rod of the utility model comprises: a rocker, a joint, a pin, a mandrel and a steel ball. Two expansion holes are formed in one ball head of the rocker, and the narrow ends of the two expansion holes are connected in opposite directions to form a long hole in the center of the inner part of the ball head. The mandrel and the steel ball are arranged in the joint, and the mandrel pushes the steel ball to partially expose the joint. The pin passes through the long hole of the rocker and the joint, so that the ball head is put into a round groove of the joint to swing mutually. The pin maintains a distance to one end of the long hole, and allows the rocker to move linearly for a stroke, so that the mandrel does not drive the steel ball to expose out of the joint, and the connecting rod is helped to be quickly combined with a spark plug sleeve to be detachable.

In an embodiment of the present utility model, two expansion holes are formed in the ball head, two ends of each expansion hole are a wide end and a narrow end, the two narrow ends are connected in opposite directions to form a long hole in the center of the ball head, the two wide ends are located on the circumferential surface of the ball head, and multiple oblique sides extend from the outer surface of the ball head to the long hole.

In an embodiment of the present utility model, the method further includes: and a support member disposed between the shoulder of the circular groove and the ball head.

In one embodiment of the utility model, the support comprises a conical spring, a reed, and a compression spring.

In one embodiment of the utility model, wherein a rolling element is placed in the main bore of the fitting, the mandrel is able to push the rolling element against a reduced diameter end of the main bore outlet to cause a portion of the rolling element to clear the circular groove beyond the shoulder.

In an embodiment of the utility model, the rolling element is a sphere, and the ball head indirectly drives the mandrel to displace through the sphere.

In one embodiment of the utility model, the mandrel is externally provided with a compression spring, one end of which resists the bottom surface of the main hole so as to be capable of providing a force to the mandrel.

In an embodiment of the present utility model, the other end of the compression spring is against a fastener embedded in the mandrel.

In one embodiment of the present utility model, the other end of the compression spring is pressed against an abutment surface of a large diameter portion of the mandrel, and a force of the compression spring presses a convex curved surface of the large diameter portion against a reduced diameter end of the main hole outlet, so that a part of the convex curved surface exceeds the shoulder to expose the circular groove.

For purposes of clarity, understanding, and appreciation of the various aspects, features and advantages of the utility model, one or more presently preferred embodiments will be described in connection with the accompanying drawings.

Drawings

Fig. 1 depicts a first embodiment of the extension rod of the present utility model that can be combined with a spark plug sleeve and a hand tool.

Fig. 2 shows the corresponding extension rod and spark plug sleeve in section.

Fig. 3 magnifies the joint of fig. 2.

Fig. 4 depicts the internal configuration of the extension rod of fig. 3 at another angle.

Fig. 5 shows the internal structure of the extension rod of fig. 4 after actuation.

Fig. 6 shows the extension rod of fig. 5 prior to engagement with the spark plug sleeve.

Fig. 7 depicts a second embodiment of the extension rod of the present utility model in combination with a spark plug sleeve.

Fig. 8 is a partial enlarged view of the internal structure of the joint of fig. 7.

Fig. 9 shows the internal structure of the joint of fig. 8 after the joint has been actuated.

Reference numerals illustrate: 10-hand tool; 11-a spark plug sleeve; 12. 23-square holes; 13-Zhu cave; 14-hexagonal holes; 15-head; 16-a grip; 17-a drive assembly; 20-connecting rods; 21-a rocker; 22-a socket; 24-ball head; 25-neck; 27-expanding the hole; 28-arrow; 29-an elongated hole; 30-linker; 31-a circular groove; 32-a main hole; 33-straight holes; 34-square columns; 36-a reduced diameter end; 37-bottom surface; 38-shoulder; 40-pins; 41-ring pieces; 42-rolling elements; 45-mandrel; 46-level parts; 47-fasteners; 48-compressing the spring; 49-steel ball; 51-hole; 53-force; 54-external force; 56-a support; 63-wide end; 64-narrow ends; 65-bevel edge; 66. 67-distance; 68-contact point; 69-stroke; 70-large diameter portion; 71-a convex curved surface; 72-against surface.

Detailed Description

Next, embodiments of the present utility model will be described with reference to the drawings. In the drawings, the same or similar structures or elements are denoted by the same reference numerals. It is contemplated that the described embodiments are merely examples of some, but not all, embodiments. Other embodiments, or configurations that may be altered or varied as desired, can be derived based on the examples described and are within the scope of the disclosure.

In the following description, directional terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and "side" are merely referring to the directions of the drawings. The use of directional terms is for better, more clear description and understanding of the present disclosure, and does not explicitly or implicitly indicate that a particular orientation, construction and operation of the apparatus or element described is required and should not be construed as limiting the technical disclosure.

In the following description, "mounted," "connected," or "disposed on …" are to be construed broadly, such as fixedly connected, detachably connected, integrally connected, mechanically connected, directly connected, indirectly connected, or connected within two elements, unless otherwise specified and clearly defined. It will be appreciated by those skilled in the art that the terminology may be used in a wide variety of embodiments and that the terminology may be practiced with the ordinary knowledge or experience.

In the following description, "a plurality" means two or more, unless otherwise indicated.

As shown in fig. 1, a first embodiment of a connecting rod 20 of the present utility model combines a handle tool 10 with a spark plug sleeve 11.

The hand tool 10 described herein refers to a wrench. The wrench has a head 15 at one end and a grip 16 at the other end. The head 15 is provided with a drive assembly 17, and a ratchet wheel (not shown) of the drive assembly 17 can idle unidirectionally in the head 15 to apply work reversely. For example, in a clockwise direction, the grip portion 16 idles around the drive assembly 17. The grip portion 16 rotates the drive assembly 17 in the same direction in a counter-clockwise direction to transfer a torque of the hand tool 10. Thus, the hand tool 10 is also known as a ratchet wrench.

As for the specific structure of the driving assembly 17, the technical features of the present utility model are not described herein.

Next, one end of the plug sleeve 11 (see fig. 2) is sunk into a square hole 12, and four planes of the square hole 12 each have a bead hole 13. The other end of the plug sleeve 11 is formed with a hexagonal hole 14, and the hexagonal hole 14 is communicated with the square hole 12, so as to be capable of being sleeved with a plug (not shown) conforming to the size specification.

As shown in fig. 2 to 4, the extension bar 20 of the present embodiment includes: a rocker 21, a joint 30, a pin 40, a piece of ring 41, a roller 42, a spindle 45, a fastener 47, a compression spring 48, a steel ball 49 and a support 56.

The rocker 21 has another square hole 23 at its tip to form a socket 22. The bottom end of the rocker 21 is provided with a ball head 24, and a neck 25 is formed between the ball head 24 and the rocker 21. The interior of the bulb 24 defines two expansion holes 27, each expansion hole 27 having a wide end 63 and a narrow end 64. The two narrow ends 64 are connected to each other in opposite directions to form a long hole 29, and the long hole 29 is located at the center of the interior of the ball head 24. Two of the wide ends 63 are located on the outer circumferential surface of the ball 24, and a plurality of sloping sides 65 extend from the outer surface of the ball 24 to the long hole 29.

Next, one end of the connector 30 protrudes a square column 34, and a straight hole 33, a main hole 32 and a circular groove 31 are connected from the square column 34 to the other end of the connector 30. The diameter of the circular groove 31 is greatest and a shoulder 38 is at the bottom of the circular groove 31 and surrounds the outlet of the main bore 32. The diameter of the straight bore 33 is minimized so that a bottom surface 37 of the main bore 32 surrounds the outlet of the straight bore 33. In addition, a hole 51 (see fig. 6) is formed at the side of the square column 34 to intersect the straight hole 33.

In this embodiment, the pin 40 secures the wall of the circular groove 31 surrounding the joint 30 and passes through the long hole 29 and the expansion hole 27 of the ball head 24. The ball 24 is placed in the circular groove 31, centered on the pin 40, to rotate with the joint 30. In other words, the rocker 21 is connected to the joint 30 so as to be able to oscillate with respect to each other. The diameter of the neck 25 is smaller than the diameter of the rocker 21, so that the amplitude of the rocking motion of the rocker 21 and the joint 30 is relatively enlarged.

In the pivoted orientation, the slot 29 moves circumferentially about the pin 40, so that the rocker 21 pivots back and forth relative to the joint 30. The beveled edge 65 of the expansion hole 27 forms an angle with the pin 40 allowing the rocker 21 to swing back and forth in the direction of arrow 28 towards both ends of the pin 40.

In this embodiment, the support 56 is a conical spring which is inserted into the circular groove 31 and has opposite ends which contact the outer surface of the ball 24 and the shoulder 38 of the circular groove 31, respectively. Thus, the support 56 pushes the ball 24 and the adapter 30 apart. The pin 40 blocks the lowest point of the slot 29, allowing the rocker 21 and the tab 30 to pull against each other to maintain a tension.

In some embodiments, the support 56 is a plurality of stacked reeds, a compression spring, or other resilient element.

In addition, the ring 41 tightens against the outer wall of the joint 30, preventing the pin 40 from coming out of the joint 30, preventing the extension rod 20 from being disassembled.

Furthermore, the fastener 47 is embedded in one end of the mandrel 45. The other end of the spindle 45 passes through the compression spring 48 and enters the straight bore 33 via the main bore 32. The two ends of the compression spring 48 contact the bottom surface 37 of the main hole 32 and the fastening member 47, respectively, so that the compression spring 48 can be pressed to accumulate a force 53. The force 53 is thus proportional to a deformation of the compression spring 48.

Wherein, a level part 46 is formed on the side of the mandrel 45 to push the steel ball 49 into a hole 51 (see fig. 6) of the square column 34. The steel balls 49 partially expose the outer surface of the square column 34, and simultaneously clamp the stepped portion 46, so that the mandrel 45 resists the acting force 53 of the compression spring 48.

In this embodiment, the rolling element 42 is a rigid sphere that is in rolling contact with the end face of the spindle 45. The spindle 45 pushes the rolling element 42 towards the circular groove 31 of the joint 30 by means of the force 53 of the compression spring 48. A reduced diameter end 36 is formed at the exit of the main bore 32 through the circular slot 31, the reduced diameter end 36 having a diameter less than the diameter of the roller member 42, such that the roller member 42 is blocked by the reduced diameter end 36 of the main bore 32, allowing a partial roller member 42 to overrun the shoulder 38 to expose the circular slot 31. At the same time, the distance 67 from the roller 42 to the outer surface of the ball 24 is shorter than the distance 66 from the pin 40 to the highest point of the slot 29.

As can be appreciated from fig. 5, an external force 54 is applied to the rocker 21, shortening the distance between the rocker 21 and the joint 30. The highest point of the slot 29 counteracts the pin 40 and a stroke 69 from the pin 40 to the lowest point of the slot 29 corresponds to the distance of the rocker 21 in a straight line. The ball 24 enters deep into the groove 31 near the shoulder 38, compresses the volume of the support 56, and forms a contact point 68 with the outer surface of the roller 42. The rolling element 42 is retracted into the main hole 32, and continuously drives the mandrel 45 to move in the same direction relative to the joint 30. At this time, the fastener 47 presses the compression spring 48 near the bottom surface 37 of the main hole 32, relatively increasing the deformation amount of the compression spring 48.

Referring next to fig. 6, the mandrel 45 extends beyond the end face of the square post 34 such that the lower step of the step 46 faces the hole 51. At this point, the steel balls 49 are free and can retract toward the mandrel 45 into the lower part of the stepped portion 46, so that the square column 34 has no steel balls 49 on the outer surface.

After the square column 34 is inserted into the square hole 12, the rocker 21 is actively pulled up by manpower. Alternatively, the rocker 21 and the joint 30 are passively pushed apart by the restoring force of the support 56. At the same time, the restoring compression spring 48 releases the force 53 (see fig. 3) which indirectly pushes the spindle 45 via the fastening element 47, together with the partial overrunning of the rolling element 42 by the shoulder 38, so that the circular groove 31 is exposed. Because the higher-level portion of the level-step portion 46 is opposite to the hole 51 (see fig. 7), the steel ball 49 is pushed out of the square column 34 again by the higher-level portion to engage the corresponding ball hole 13, thereby completing the action of the connecting rod 20 combined with the plug sleeve 11.

Referring back to fig. 1 and 2, below the head 15 is an excess part of the drive assembly 17 which can be inserted into a square hole 23 of the socket 22. In this way, the connecting rod 20 transmits the torque of the hand tool 10 to the spark plug sleeve 11, locking the spark plug for installation or unscrewing.

Fig. 7 depicts a second embodiment of the extension rod 20, which is substantially identical in construction to the first embodiment, except that: first, there are no rolling elements and no fasteners. The mandrel 45 has one more large diameter portion 70. The large diameter portion 70 is formed at the end of the mandrel 45, and includes a convex curved surface 71 and a contact surface 72. Wherein the abutment surface 72 is an annular surface surrounding the spindle 45, the annular surface being inside the main bore 32 and contacting the bottom surface 37 at both ends of the compression spring 48, respectively, changing the amount of deformation of the compression spring 48 and the force 53. The large diameter portion 70 of the second embodiment replaces the fastener of the first embodiment, and the efficacy of the extension rod 20 is not impaired.

Furthermore, the force 53 of the compression spring 48 pushes the convex curved surface 71 of the large diameter portion 70 directly against the reduced diameter end 36, together with the local convex curved surface 71 beyond the shoulder 38, thereby exposing the circular groove 31.

As shown in fig. 8, the distance 67 from the convex curved surface 71 to the outer surface of the ball head 24 is shorter than the distance 66 from the pin 40 to the highest point of the long hole 29. In fig. 9, after the rocker 21 receives the external force 54, it generates a contact point 68 with the convex curved surface 71 of the large diameter portion 70, and the distance between the two moves linearly corresponds to the stroke 69 from the pin 40 to the lowest point of the long hole 29. Therefore, the large diameter portion 70 of the second embodiment replaces the rolling member of the first embodiment, and the efficacy of the extension bar 20 is not impaired.

Those skilled in the art will appreciate and readily change the embodiments described above without departing from the broad inventive concept thereof. Therefore, it is intended that the present application not be limited to the particular embodiments disclosed, but that the disclosure cover and protect against the literal scope of the present disclosure.

Claims (9)

1. The utility model provides a quick detach structure of extension pole which characterized in that includes:

a joint, one end of which protrudes a square column, a main hole and a circular groove are formed to be connected from the square column to the other end of the joint, the diameter of the circular groove is the largest, the diameter of the straight hole is the smallest, so that the bottom surface of the circular groove forms a shoulder, the main hole has a bottom surface, and a hole extends from the side edge of the square column to intersect the straight hole;

a mandrel having a stepped portion, the mandrel reciprocating from the main bore to the straight bore;

the steel ball is configured with a hole of the square column, and the level part of the mandrel pushes the steel ball to be partially exposed out of the square column to be normal;

the rocker is provided with a ball head, and a long hole is formed in the ball head; and

a pin fixed on the joint, the ball head being placed in the circular groove, the pin passing through the long hole;

for keeping the spindle at a distance from the outside of the ball head when one of the two ends of the slot is adjacent to the pin, the rocker and the joint swinging relative to each other;

the rocker moves linearly and goes deep into the round groove, so that the pin is adjacent to the other end of the long hole, the ball head directly or indirectly drives the mandrel to displace relative to the joint, and the steel ball is not driven to be exposed out of the square column along with the level part.

2. The quick release structure of the connecting rod as claimed in claim 1, wherein two expansion holes are formed in the ball head, two ends of each expansion hole are respectively a wide end and a narrow end, the two narrow ends are connected in opposite directions to form a long hole in the center of the interior of the ball head, the two wide ends are positioned on the circumferential surface of the exterior of the ball head, and a plurality of bevel edges extend from the outer surface of the ball head to the long hole.

3. The quick release structure of a extension rod of claim 1, further comprising: and a support member disposed between the shoulder of the circular groove and the ball head.

4. A quick release structure of a connecting rod as claimed in claim 3 wherein the support member comprises a conical spring, a reed, a compression spring.

5. The quick release structure of claim 1, wherein a roller is disposed in the main bore of the connector, the mandrel being capable of pushing the roller against a reduced diameter end of the main bore outlet to partially clear the shoulder of the roller and expose the circular groove.

6. The quick release structure of claim 5, wherein the rolling element is a ball, and the ball indirectly drives the spindle to displace via the ball.

7. The quick release structure of claim 1 wherein the mandrel is externally provided with a compression spring having one end thereof abutting against the bottom surface of the main bore to provide a force to the mandrel.

8. The quick release structure of the extension rod of claim 7, wherein the other end of the compression spring is against a fastener that engages the mandrel.

9. The quick release structure of claim 7, wherein the other end of the compression spring abuts a resisting surface of a large diameter portion of the mandrel, and a force of the compression spring causes a convex curved surface of the large diameter portion to abut a reduced diameter end of the main bore outlet to partially override the shoulder to expose the circular groove.