Ultra-thin ratchet wrench

Abstract

A handle is of a hollow structure, the hollow structure is divided into two sections, the first section is located in a grip of the handle, the second section is an oil conveying path located in the front portion of the handle, a supporting block is fixedly connected to the first section of the hollow structure, and the second section of the hollow structure is divided into an oil storage cavity through the supporting block; the oil conveying path communicates with the oil storage cavity and the interior of the wrench head. A lubricating mechanism is arranged in the hollow structure and comprises a screw rod which penetrates through the supporting block and is in threaded connection with the supporting block, a piston arranged at the end part of the screw rod and a valve core arranged at the tail end of the oil transportation path; and the piston is in sealing fit with the oil storage cavity. Through cooperation of the piston, the oil conveying path and the valve element, lubricating oil in the oil storage cavity opens the valve element through the oil conveying path under the action of pressure and is supplied to a transmission part in the head, the lubricating oil is injected into the wrench and can directly reach the transmission part, the lubricating effect is good, and meanwhile the head is prevented from being contaminated with the lubricating oil.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ratchet wrench, especially to an ultra-thin ratchet wrench. BACKGROUND

[0002] Wrenches are very common in our life, mainly used for repairing mechanical equipment with screws. Ratchet wrench is one of the wrenches, which is more widely used. It is mainly used in narrow space, such as disassembling automobile spark plug, automobile chassis, engine interior, automobile engine shell, automobile sheet metal, water tank, cooling pump, oil filter, cooling compressor. It is fully polished, with matt surface, excellent wear resistance and rust prevention; professional design only needs 5° action to rotate nut; one-way drive, clockwise rotation, convenient and agile, high efficiency and fast.

[0003] In many actual repair and assembly work scenes, the space is often very limited. For example, in the automobile engine compartment, various pipelines and lines are crisscrossed, when some nuts or bolts located in the small corner need to be disassembled or fastened, the ordinary wrench with large head size may not be able to enter the work area smoothly. The ultra-thin head design makes the ratchet wrench closer to the object being operated when operating. When working on the surface of a complex mechanical structure, such as around the circuit board in the electronic equipment, the operator can control the position and angle of the wrench more accurately because the ultra-thin head occupies less space.

[0004] The ratchet mechanism and transmission components inside the ratchet wrench will generate friction in frequent operation. In order to reduce wear and tear, prevent metal parts from rusting or jamming, and also to reduce the resistance when the ratchet switches direction, avoid the wrench "reverse" or unable to lock the direction due to internal dryness, especially the ultra-thin ratchet head, which is relatively compact, the contact surface of the ratchet and pawl is smaller, and the friction is more concentrated. Therefore, more attention should be paid to lubrication and maintenance for the ultra-thin head of the ratchet wrench. In the prior art, for the ultra-thin head, lubricating oil is dripped into the gap on the side of the head, and the oil is evenly distributed by repeatedly rotating the wrench, and then the lower surface is cleaned.

[0005] However, in the actual use process, the lubricating oil cannot directly reach the contact parts of the transmission components inside the head, and the lubricating oil will be retained in the gap, and it cannot be confirmed whether the transmission components have been lubricated. Although the surface of the head is wiped and cleaned, this cleaning cannot penetrate into the gap, and the lubricating oil remaining in the gap will seep out in the subsequent use process, causing the outer surface of the head to be contaminated with lubricating oil, which will bring inconvenience to the subsequent operation. SUMMARY

[0006] In order to solve the above-mentioned technical problems, the utility model provides a kind of super thin ratchet wrench, adopt the mode of internal lubricating oil, utilize the space inside handle to save lubricating oil, establish internal lubrication passage, without external lubricating oil, lubricating oil can reach transmission component contact position, lubrication effect is good, simultaneously will not contaminate head outer surface, do not affect wrench operation.

[0007] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of super thin ratchet wrench, including wrench head and the handle fixedly connected with wrench head, the inside of handle is hollow structure, hollow structure is divided into two sections, first section is in handle handle inside, second section is the oil delivery path in the front part of handle, the first section of hollow structure is fixedly connected with support block, support block separates the second section of hollow structure and oil storage cavity, oil delivery path is connected oil storage cavity and the inside of wrench head;Lubricating mechanism is arranged in hollow structure, the lubricating mechanism includes screw rod passing through the support block and being threadedly connected with support block, piston being arranged at the end of screw rod and valve core being arranged at the terminal of oil delivery path;The piston is sealingly cooperated with oil storage cavity.

[0008] The inside of handle is designed into hollow structure, it is convenient to set up lubricating mechanism and form oil storage cavity, make full use of the structure of wrench itself, oil storage cavity uses lubricating mechanism, and lubricating oil is transported from oil delivery path to front end super thin head, to realize internal lubricating oil, so that lubricating oil reaches transmission component in super thin head, and the contact position of transmission component is lubricated, lubrication effect is good, and lubricating oil is not needed from outside, to avoid external contamination;The second section of hollow structure is oil delivery path, the aperture of oil delivery path is relatively small, meets the premise of oil supply, when not supplying oil, lubricating oil can also be avoided to lose, in combination with the valve core at the terminal of oil delivery path, improve oil way sealing, ensure safety;The valve core at the terminal of oil delivery path is a one-way opening structure, and it is opened under the pressure of lubricating oil, and once the pressure is removed, the valve core is closed;The amount of lubricating oil added to the wrench should be appropriate, generally 2-4 drops, therefore, the lubricating mechanism of the application uses screw rod as lubricating oil pressurizing and pushing component, the rotation of screw rod belongs to a kind of axial movement distance controllable mode, and the rotation angle of screw rod is designed, so that the output of lubricating oil can be controlled to 2-4 drops.

[0009] Preferably, the support block is located at the first section of the hollow structure, and a threaded hole is formed in the center of the support block.

[0010] Preferably, the first section of the hollow structure has a larger inner diameter than the second section of the hollow structure, and the screw rod and the oil delivery path are located at the center of the handle.

[0011] Preferably, the valve core is a spring one-way valve core, which is arranged at the terminal of the oil delivery path, and the opening direction of the spring one-way valve core is towards the wrench head.

[0012] As preferred, the connection between the piston and the end of the screw rod is rotational, the piston is columnar, the outer periphery of the piston is provided with a sealing rubber ring, the middle part of the piston is provided with a connecting ball head, the end of the screw rod is provided with a matching ball groove, the connecting ball head is inserted into the matching ball groove, and the end surface of the screw rod is in contact with the corresponding surface of the piston. The rotational connection between the piston and the screw rod means that the piston can rotate relative to the screw rod, so that when the screw rod rotates, the piston does not rotate, and the piston only moves axially with the rotation of the screw rod, so that the piston has no extra movement and the sealing property of the piston is ensured; the end surface of the screw rod is a radial surface perpendicular to the axis, and the surface of the piston is in contact with the end surface of the screw rod, so that the piston does not tilt when moving axially.

[0013] As preferred, the second section of the hollow structure in the handle is an open structure, and the opening is located at the tail end of the handle; the tail end of the screw rod is provided with a knob, the end surface of the knob is provided with a cross-shaped groove, and the cross-shaped groove faces the tail end of the handle. The cross-shaped groove on the knob can control the rotation of the screw rod.

[0014] As preferred, the outer diameter of the screw rod is smaller than the inner diameter of the second section of the hollow structure in the handle, and the outer diameter of the knob is matched with the inner diameter of the second section.

[0015] As preferred, the outer wall of the handle is provided with an observation port, and the length of the observation port is greater than the length of the oil storage cavity. The existence of the observation port can observe the change of the moving position of the piston when the lubricating oil is added.

[0016] As preferred, the outer wall of the handle is provided with an oil injection port, the oil injection port is communicated with the oil storage cavity, and a plug is arranged in the oil injection port.

[0017] As preferred, the tail end of the handle is threadedly connected with a threaded sealing cover. The threaded sealing cover can protect the screw rod and avoid exposure of the screw rod.

[0018] The utility model has the following beneficial effects:

[0019] 1. Through the cooperation of the piston, the oil conveying diameter and the valve core, the lubricating oil in the oil storage cavity is opened by the valve core under the action of pressure through the oil conveying diameter and is supplied to the transmission component at the head part, the internal injection of the lubricating oil of the wrench is realized, the lubricating oil can directly reach the transmission component, the lubrication effect is good, and meanwhile, the head part is prevented from being contaminated by the lubricating oil;

[0020] 2. The rotational connection between the piston and the screw rod makes the piston only move axially and not rotate, so that the sealing property of the piston is ensured;

[0021] 3. The screw rod is used for pressurizing the lubricating oil and pushing the lubricating oil to be injected, so that quantitative oil supply can be realized, and the lubricating oil is prevented from being excessive and causing oil seepage. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal cross-section of a handle according to the present invention;

[0024] Figure 3 This is a schematic diagram of a piston and screw mating structure according to the present invention.

[0025] Legend:

[0026] 1. Wrench head, 2. Handle, 3. Threaded sealing cap, 4. Inspection port, 5. Oil filling port, 6. Lubrication mechanism, 611. Support block, 612. Screw, 613. Knob, 614. Piston, 615. Oil supply diameter, 616. Valve core, 617. Connecting ball head. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Reference Figure 1 - Figure 3 An ultra-thin ratchet wrench includes a wrench head 1 and a handle 2 fixedly connected to the wrench head. The handle has a hollow structure divided into two sections: a first section inside the handle grip and a second section forming an oil delivery channel at the front of the handle. A support block 611 is fixedly connected to the first section of the hollow structure, dividing the second section into an oil storage chamber. The oil delivery channel connects the oil storage chamber to the inside of the wrench head. The inner diameter of the first section of the hollow structure inside the handle is larger than the inner diameter of the second oil delivery channel. Both the screw and the oil delivery channel are located at the axial position of the handle. A lubrication mechanism 6 is provided inside the hollow structure. The lubrication mechanism includes a screw 612 passing through the support block and threadedly connected to the support block, a piston 614 located at the end of the screw, and a valve core 616 located at the end of the oil delivery channel. An observation port 4 is provided on the outer wall of the handle corresponding to the position of the oil storage chamber. The length of the observation port is greater than the length of the oil storage chamber, and a closed panel is provided at the observation port. An oil filling port 5 is located near the observation port. The oil filling port is connected to the oil storage chamber and is plugged.

[0029] The support block is located at the position of the first section of the hollow structure, which is offset from the oil delivery diameter. The oil storage chamber is between the support block and the starting end of the oil delivery diameter. The piston is located in the oil storage chamber and is sealed to the oil storage chamber.

[0030] The center part of the supporting block is provided with a threaded hole, and the end of the screw rod passes through the threaded hole and is threadedly connected.

[0031] The valve core is a spring one-way valve core, which is arranged at the terminal end of the oil delivery path, and the opening direction of the spring one-way valve core is towards the wrench head.

[0032] The second section of the hollow structure of the handle is an open structure, and the opening is located at the tail end of the handle. The tail end of the screw rod is provided with a knob 613, and the end face of the knob is provided with a cross recess, which is towards the tail end of the handle. The outer diameter of the screw rod is smaller than the inner diameter of the second section of the hollow structure of the handle, and the outer diameter of the knob is matched with the inner diameter of the second section.

[0033] The tail end of the handle is threadedly connected with a threaded sealing cover 3.

[0034] When the ratchet pawl part and the steering locking part of the wrench head 1 need to be lubricated, the threaded sealing cover 3 at the tail end of the handle 2 is turned down, the cross recess behind the knob 613 is turned by a screwdriver, so as to drive the whole screw rod 612 to rotate, the screw rod 612 rotates and moves axially inward, and then drives the piston 614 at the top of the screw rod 612 to move towards the oil delivery path direction, and the lubricating oil is squeezed during the movement, so that the lubricating oil overcomes the resistance of the valve core through the oil delivery path 615 in the handle 2, and then the lubricating oil is injected into the inside of the wrench head after the valve core is opened, and the amount of lubricating oil is controlled by the rotation angle of the screw rod, and the position of the piston can be observed in real time through the observation hole 4 opened on one side of the handle 2.

[0035] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An ultra-thin type of ratchet wrench, characterized by: The wrench head (1) and the handle (2) are fixedly connected with the wrench head (1), the inside of the handle (2) is a hollow structure, the hollow structure is divided into two sections, the first section is in the inside of the handle grip, and the second section is an oil feeding channel (615) in the front part of the handle; the first section of the hollow structure is fixedly connected with a supporting block (611), the supporting block separates the second section of the hollow structure into an oil storage cavity, and the oil feeding channel communicates the oil storage cavity and the inside of the wrench head; a lubricating mechanism (6) is arranged in the hollow structure, the lubricating mechanism (6) comprises a screw rod (612) penetrating through the supporting block and being threadedly connected with the supporting block, a piston (614) arranged at the end of the screw rod (612) and a valve core (616) arranged at the terminal end of the oil feeding channel; the piston is in sealing cooperation with the oil storage cavity.

2. The super-thin type of ratchet wrench according to claim 1, wherein: The supporting block is located at the position of the first section of the hollow structure and deviates from the oil feeding channel, a threaded hole is arranged at the central part of the supporting block, and the screw rod penetrates through the threaded hole and is threadedly connected.

3. The super-thin type of ratchet wrench according to claim 1, wherein: The inner diameter of the first section of the hollow structure in the handle is greater than the inner diameter of the second section of the oil feeding channel, and the screw rod and the oil feeding channel are both located at the axial center of the handle.

4. The super-thin type of ratchet wrench according to claim 1 or 2 or 3, characterized in that: The valve core is a spring one-way valve core, the spring one-way valve core is arranged at the terminal end of the oil feeding channel, and the opening direction of the spring one-way valve core faces the wrench head.

5. The super-thin type of ratchet wrench according to claim 1, wherein: The end of the piston is rotationally connected with the screw rod, the piston is in a columnar structure, a sealing rubber ring is arranged at the outer periphery of the piston, a connecting ball head (617) is arranged at the middle part of the piston, the end of the screw rod is provided with a matching ball groove, the connecting ball head is inserted into the matching ball groove, and the end face of the screw rod is in contact with the corresponding surface of the piston.

6. The super-thin type of ratchet wrench according to claim 1 or 5, wherein: The second section of the hollow structure in the handle is an open structure, and the opening is located at the tail end of the handle; the tail end of the screw rod is provided with a knob (613), a cross recess is arranged on the end face of the knob, and the cross recess faces the tail end of the handle.

7. The super-thin type of ratchet wrench according to claim 6, wherein: The outer diameter of the screw rod is smaller than the inner diameter of the second section of the hollow structure in the handle, and the outer diameter of the knob is matched with the inner diameter of the second section.

8. The super-thin type of ratchet wrench according to claim 1 or 2 or 3 or 5, characterized in that: An observation opening (4) is arranged on the outer wall of the handle (2), and the length of the observation opening is greater than the length of the oil storage cavity.

9. The super-thin type of ratchet wrench according to claim 8, wherein: An oil injection port (5) is arranged on the outer wall of the handle (2), the oil injection port communicates with the oil storage cavity, and a plug is arranged in the oil injection port.

10. The super-thin type of ratchet wrench according to claim 1 or 2 or 3 or 5, characterized in that: A threaded sealing cover (3) is threadedly connected with the tail end of the handle (2).

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