CN219865376U

CN219865376U - Inflatable expansion fitting of electric wrench

Info

Publication number: CN219865376U
Application number: CN202320067049.3U
Authority: CN
Inventors: 李新疆
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-10-20
Anticipated expiration: 2033-01-10

Abstract

The utility model relates to the technical field of inflation devices, in particular to an inflation expansion fitting of an electric wrench, which comprises an upper shell, a lower shell, a cylinder barrel and a piston, wherein a support is fixedly arranged on the inner wall of the upper shell, the cylinder barrel is arranged on the support in a sitting manner, the piston driven by a reciprocating linkage mechanism is arranged in the cylinder barrel, a one-way valve plate is covered above the cylinder barrel, an air inlet and an air outlet are arranged on the one-way valve plate, and a sealing cover is arranged above the one-way valve plate. When the electric wrench is used, the electric wrench provided with the sleeve is inserted on the multi-edge installation part of the transmission shaft, and the switch on the electric wrench is buckled, so that the continuous motion of the reciprocating linkage mechanism can be continuously driven, and further, the piston continuously sucks and exhausts air. The device has simple structure and low manufacturing cost, can be easily miniaturized, is convenient for emergency inflation outdoors, can well meet the requirements of modern consumers on the light weight and portability of outdoor equipment, and has strong practicability.

Description

Inflatable expansion fitting of electric wrench

Technical Field

The utility model relates to the technical field of inflation devices, in particular to an inflation expansion fitting of an electric wrench.

Background

The electric wrench with the storage battery is a known technology, the appearance of the electric wrench is mostly in the shape of a pistol, the effect of multiple functions of one machine can be realized by installing different working heads on a rotating column of the electric wrench, for example, a sleeve is arranged on the rotating column, the bolts and the tires can be disassembled, a drill bit is arranged, holes can be drilled, and a screwdriver bit is arranged, so that the electric wrench with the storage battery can be screwed. If the manual inflator is used for inflation, the time and labor are wasted, the efficiency is low, the electric inflator is needed to be connected with an automobile power supply for normal use, so the electric inflator has larger limitation, and the electric inflator with a storage battery is also available, and has larger volume and mass although the electric inflator has no limitation on a use area, so that the electric inflator is heavy and inconvenient to move everywhere, and is light in weight and portable, and is the final requirement of outdoor sports lovers on outdoor equipment, so an inflation accessory matched with an electric wrench is needed to meet the outdoor inflation requirement.

Disclosure of Invention

The utility model provides an inflatable expansion fitting of an electric wrench, which overcomes the defects in the prior art and can effectively solve the problem that the existing electric wrench lacks inflatable fittings.

The purpose of the utility model is realized in the following way: the inflatable expansion accessory of the electric wrench comprises an upper shell, a lower shell, a cylinder barrel and a piston, wherein the lower end of the upper shell is integrally connected with the upper end of the lower shell, a support is fixedly arranged on the inner wall of the upper shell, a cylindrical mounting channel is arranged on the inner side of the support, a circular arc-shaped groove is arranged on the upper end face of the support along the upper edge of the mounting channel, the annular lower edge of the cylinder barrel is arranged on the groove so that the inner side wall of the cylinder barrel is flush with the inner side wall of the mounting channel part of the support, a one-way valve plate is covered above the cylinder barrel, a first sealing ring is clamped between the annular upper edge of the cylinder barrel and the lower end face of the one-way valve plate, at least one air inlet and one air outlet are respectively arranged on the one-way valve plate, a sealing cover is arranged above the one-way valve plate, a partition plate is fixedly arranged on the inner wall of the sealing cover so as to divide the interior of the sealing cover into a left air inlet chamber and a right air outlet chamber which are independent of each other and are not communicated, the lower end face of the baffle is flush with the lower end face of the sealing cover, the same second sealing ring is clamped between the lower end face of the baffle and the upper end face of the one-way valve plate, the lower end face of the sealing cover and the upper end face of the one-way valve plate, the air inlet is positioned in the left air inlet chamber, the air outlet is positioned in the right air outlet chamber, the sealing cover, the one-way valve plate and the upper casing are fixedly connected together by connecting screws arranged at the periphery of the outer side of the sealing cover, the air inlets communicated with the left air inlet chamber are arranged on the outer wall of the sealing cover, at least one air inlet is arranged on the outer wall of the sealing cover, the air outlet communicated with the right air outlet chamber is also arranged on the outer wall of the sealing cover, the air outlet is provided with an air charging hose, the piston is arranged in the cylinder barrel, the outer edge of the piston is tightly stuck on the inner side of the cylinder barrel, the rotatable transmission shaft is horizontally arranged in the lower casing, a reciprocating linkage mechanism capable of enabling the piston to reciprocate up and down is arranged on a transmission shaft in the lower casing, and a section of multi-edge installation part is arranged on the right overhanging end of the transmission shaft.

The following are further optimizations and/or improvements to the above-described inventive solution: further, the reciprocating linkage mechanism comprises a connecting rod, an eccentric bearing, a balancing weight and a center bearing, one end of the connecting rod is installed on the lower end face of the piston, the other end of the connecting rod is integrally connected with a buckle, the inner side of the buckle is a circular installation opening, a slit communicated with the installation opening is formed in the lower end face of the buckle, a clamping screw is arranged on the buckle at the slit, an inner ring of the eccentric bearing is installed on a transmission shaft in the lower casing, an outer ring of the eccentric bearing is installed in the installation opening of the buckle through the clamping screw, and the balancing weight is further fixedly arranged on the transmission shaft on the left side of the eccentric bearing.

Further, the check valve plate comprises a plate, a first elastic sealing sheet, a second elastic sealing sheet and a limit bar block, wherein the middle part of the plate is provided with an air inlet and two air outlets in a penetrating way, the three air inlets are distributed at intervals, the lower end face of the plate is provided with the first elastic sealing sheet, one end of the first elastic sealing sheet is a free end and is completely covered on the air inlet, the other end of the first elastic sealing sheet is riveted on the lower end face of the plate, the upper end face of the plate is provided with the limit bar block, the long sides of the limit bar block are distributed back and forth, the middle part of the limit bar block is riveted between the two air outlets, the front side and the rear side of the limit bar block are respectively located above the air outlets on the corresponding side, a limit gap is arranged between the limit bar block and the air outlets, the second elastic sealing sheet is clamped between the plate and the limit bar block through the middle anchor point of the limit bar block, and the front and rear free ends of the second elastic sealing sheet are respectively completely covered on the air outlets on the corresponding side.

Further, a plurality of heat dissipation long holes are arranged on the outer side walls of the upper shell and the lower shell.

Further, the piston comprises a pressing sheet, a Teflon sealing bowl and a tray which are sequentially distributed from top to bottom, the pressing sheet is connected with the tray through screws so as to clamp the Teflon sealing bowl, and the circular outer edge of the Teflon sealing bowl is tightly attached to the inner wall of the cylinder barrel.

The utility model has reasonable and compact structure, when in use, the electric wrench with the sleeve is inserted on the multi-edge installation part of the transmission shaft, then the inflatable hose is connected to the inflated article, then a user holds the device with one hand and holds the electric wrench with the other hand, the switch on the electric wrench is buckled to continuously drive the transmission shaft to rotate, the continuous rotation of the transmission shaft can drive the continuous motion of the reciprocating linkage mechanism, further the piston in the cylinder barrel continuously reciprocates up and down, and the device can continuously and stably output gas outwards by adding the unidirectional air inlet and air outlet of the unidirectional valve plate, thereby achieving the aim of external inflation. The device has simple structure and low manufacturing cost, can be easily miniaturized, is convenient for emergency inflation outdoors, can well meet the requirements of modern consumers on the light weight and portability of outdoor equipment, and has strong practicability.

Drawings

The specific structure of the present utility model is shown in the following drawings and examples:

FIG. 1 is a schematic axial side view of an inflatable expansion fitting of an electric wrench;

FIG. 2 is an enlarged schematic view of the check valve plate of FIG. 1;

FIG. 3 is an enlarged schematic view of the seal cap of FIG. 1;

FIG. 4 is a schematic cross-sectional front view of an inflatable expansion fitting of the electric wrench;

fig. 5 is an enlarged schematic view of the piston of fig. 1.

Legend: 1. the upper shell, 2, the lower shell, 3, the cylinder barrel, 4, the support, 5, the installation channel, 6, the one-way valve plate, 7, the first sealing ring, 8, the air inlet, 9, the air outlet, 10, the sealing cover, 11, the partition plate, 12, the left air inlet chamber, 13, the right air outlet chamber, 14, the second sealing ring, 15, the connecting screw, 16, the air suction port, 17, the exhaust nozzle, 18, the inflatable hose, 19, the transmission shaft, 20, the multi-edge installation part, 21, the connecting rod, 22, the eccentric bearing, 23, the balancing weight, 24, the central bearing, 25, the buckle, 26, the slit, 27, the clamping screw, 28, the plate, 29, the first elastic sealing sheet, 30, the second elastic sealing sheet, 31, the limiting bar, 32, the limiting gap, 33, the long hole, 34, the pressing sheet, 35, the Teflon sealing bowl, 36 and the tray.

Detailed Description

The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.

In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of up, down, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.

The utility model is further described below with reference to examples and figures, in which: as shown in fig. 1 to 5, the inflatable expansion fitting of the electric wrench comprises an upper casing 1, a lower casing 2, a cylinder barrel 3 and a piston, wherein the lower end of the upper casing 1 is integrally connected with the upper end of the lower casing 2, a support 4 is fixedly arranged on the inner wall of the upper casing 1, a cylindrical mounting channel 5 is arranged on the inner side of the support 4, a circular arc-shaped groove is arranged on the upper end face of the support 4 along the upper edge of the mounting channel 5, the annular lower edge of the cylinder barrel 3 is arranged on the groove so that the inner side wall of the cylinder barrel 3 is flush with the inner side wall of the mounting channel 5 of the support 4, a check valve plate 6 is covered above the cylinder barrel 3, a first sealing ring 7 is clamped between the annular upper edge of the cylinder barrel 3 and the lower end face of the check valve plate 6, at least one air inlet 8 and one air outlet 9 are respectively arranged on the check valve plate 6, a sealing cover 10 is arranged above the check valve plate 6, a baffle plate 11 is fixedly arranged on the inner wall of the sealing cover 10 to divide the inside of the sealing cover 10 into a left air inlet chamber 12 and a right air outlet chamber 13 which are mutually independent and are not communicated, the lower end face of the baffle plate 11 is flush with the lower end face of the sealing cover 10, a second sealing ring 14 is clamped between the lower end face of the baffle plate 11 and the upper end face of the one-way valve plate 6 and between the lower end face of the sealing cover 10 and the upper end face of the one-way valve plate, an air inlet 8 is arranged in the left air inlet chamber 12, an air outlet 9 is arranged in the right air outlet chamber 13, connecting screws 15 are arranged at the peripheral positions outside the sealing cover 10 to fixedly connect the sealing cover 10, the one-way valve plate 6 and the upper casing 1 together, at least one air inlet 16 communicated with the left air inlet chamber 12 is arranged on the outer wall of the sealing cover 10, an exhaust nozzle 17 communicated with the right air outlet chamber 13 is also arranged on the outer wall of the sealing cover 10, the number of the exhaust nozzles 17 is one, an air charging hose 18 is arranged on the exhaust nozzle 17, a piston is arranged in the cylinder barrel 3, the outer edge of the piston is tightly attached to the inner side of the cylinder barrel 3, a rotatable transmission shaft 19 is horizontally arranged in the lower casing 2, a reciprocating linkage mechanism capable of enabling the piston to reciprocate up and down is arranged on the transmission shaft 19 in the lower casing 2, and a section of multi-edge installation part 20 is arranged on the right extending end of the transmission shaft 19.

The specific use process of the device is as follows: the electric wrench with the sleeve is inserted on the multi-edge installation part 20 of the transmission shaft 19, then the inflatable hose 18 connected with the exhaust nozzle 17 is connected to an inflated article, then a user holds the device with one hand and holds the electric wrench with the other hand, the switch on the electric wrench is buckled to continuously drive the transmission shaft 19 to rotate, the continuous rotation of the transmission shaft 19 drives the continuous motion of the reciprocating linkage mechanism, and then the piston in the cylinder barrel 3 continuously reciprocates up and down, so that the unidirectional valve plate 6 continuously performs unidirectional air inlet and exhaust operation, and the device continuously and stably outputs air outwards, thereby achieving the aim of external inflation. The device has the advantages of simple structure and low manufacturing cost, can be easily miniaturized, is convenient to carry out emergency inflation outdoors, increases the use function of the existing electric wrench, also meets the use requirements of customers on the light weight and portability of outdoor equipment, and has strong practicability.

According to actual needs, the inflatable expansion fitting of the electric wrench is further optimized or/and improved: further, as shown in fig. 1, 4 and 5, the reciprocating linkage mechanism comprises a connecting rod 21, an eccentric bearing 22, a balancing weight 23 and a central bearing 24, one end of the connecting rod 21 is installed on the lower end face of the piston, the other end of the connecting rod 21 is integrally connected with a buckle 25, the inner side of the buckle 25 is a circular installation opening, a slit 26 communicated with the installation opening is formed in the lower end face of the buckle 25, a clamping screw 27 is arranged on the buckle 25 at the slit 26, an inner ring of the eccentric bearing 22 is installed on a transmission shaft 19 in the lower casing 2, an outer ring of the eccentric bearing 22 is installed in the installation opening of the buckle 25 through the clamping screw 27, and the balancing weight 23 is further fixedly arranged on the transmission shaft 19 at the left side of the eccentric bearing 22.

The eccentric bearing 22 is a known technology in the prior art, when the transmission shaft 19 rotates, the eccentric bearing 22 arranged on the transmission shaft 19 can make eccentric movement, so that the connecting rod 21 arranged on the eccentric bearing can be driven to make up-and-down fluctuation reciprocating movement, the up-and-down fluctuation movement is finally changed into the piston almost straight up-and-down reciprocation under the limit of the cylinder barrel 3, the piston is not the theoretical straight up-and-down movement and has certain deflection, but as long as the eccentric ratio of the eccentric bearing 22 is proper, the eccentric bearing 22 can not make larger-amplitude movement, the piston can not be deflected left and right to a larger extent, and the piston is in elastic contact with the inner wall of the cylinder barrel 3, so that small-amplitude deflection of the piston in the cylinder barrel 3 can be adapted, and the tightness and operation safety between the piston and the cylinder barrel 3 can not be influenced, and the small-amplitude deflection can not influence the normal air suction and exhaust operation of the device. The piston and the connecting rod 21 can be hinged or fixedly connected, but the hinge can effectively reduce the deflection phenomenon of the piston in the cylinder barrel 3, so that the piston moves more nearly to the theoretical straight up and down. The main function of the balancing weight 23 counteracts the vibration generated by the transmission shaft 19 in the running process, and ensures the stability and safety of the transmission shaft 19 in the running process.

Further, as shown in fig. 1, 2 and 4, the unidirectional valve plate 6 includes a plate 28, a first elastic sealing sheet 29, a second elastic sealing sheet 30 and a limiting bar 31, where the middle of the plate 28 is provided with an air inlet 8 and two air outlets 9 penetrating through, the three air outlets are distributed at intervals, the lower end surface of the plate 28 is provided with the first elastic sealing sheet 29, one end of the first elastic sealing sheet 29 is a free end and is completely covered on the air inlet 8, the other end of the first elastic sealing sheet 29 is riveted on the lower end surface of the plate 28, the upper end surface of the plate 28 is provided with a limiting bar 31, the long sides of the limiting bar 31 are distributed back and forth, the middle of the limiting bar 31 is riveted between the two air outlets 9, the front and back sides of the limiting bar 31 are respectively located above the corresponding air outlets 9 on one side, a limiting gap 32 is provided between the limiting bar 31 and the air outlets 9, the second elastic sealing sheet 30 is clamped between the plate 28 and the limiting bar 31 through the middle anchor point of the limiting bar 31, and the front and back free ends of the second elastic sealing sheet 30 are completely covered on the corresponding air outlets 9 on one side respectively.

The specific working principle of the one-way valve is as follows: when the piston moves downwards, the air in the cylinder barrel 3 expands to cause the pressure in the cylinder barrel to be smaller than the pressure of the outside, so that under the action of the pressure difference between the inside and the outside, the blocking end of the first elastic sealing sheet 29 can elastically deform and tilt, and then the air inlet 8 is opened, and at the moment, the outside air is finally sucked into the cylinder barrel 3 through the air suction port 16, the left air inlet chamber 12 and the air inlet 8, which is the one-time air suction process of the piston in the device; when the piston moves upwards, the air volume in the cylinder barrel 3 is compressed, so that the air pressure of the cylinder barrel 3 is larger than the air pressure of the outside, an internal-external pressure difference is formed, at the moment, the first elastic sealing sheet 29 which is originally tilted is flattened again by one side of the high-pressure air in the cylinder barrel 3, so that the air inlet 8 is blocked, the second elastic sealing sheet 30 is pushed up by the other side of the high-pressure air, namely, the blocking end of the second elastic sealing sheet 30 is elastically deformed and tilted upwards, finally, the high-pressure air in the cylinder barrel 3 is input to a device to be inflated, such as a tire, a life buoy, an inflatable tent and the like through the inflatable hose 18 arranged on the right air outlet chamber 13, and the one-way valve plate 6 continuously and unidirectionally inhales and exhausts under the continuous up-down reciprocating motion of the piston. The first elastic sealing sheet 29 and the second elastic sealing sheet 30 are both metal sheets, and the main function of the limiting bar 31 is to avoid the problem that the second elastic sealing sheet 30 is too large in tilting amplitude during exhaust, so that permanent deformation and incapability of resetting are caused, and the first elastic sealing sheet 29 is not provided with such a limiting device, because even if the first elastic sealing sheet 29 is deformed and incapability of resetting is caused, the upper end face of the piston is pressed and reset in time, and because the rising limit of the design of the piston reaches the lower end face of the plate 28, the limiting protection device such as the second elastic sealing sheet 30 is not needed.

Further, as shown in fig. 1, a plurality of long heat dissipation holes 33 are provided on the outer side walls of the upper and lower cases 1 and 2.

The heat dissipation effect of the device can be further improved through the heat dissipation long holes 33, the probability of operation failure caused by high temperature in the continuous operation process of the device is further reduced, and the operation safety of the device is ensured.

Further, as shown in fig. 4 and 5, the piston comprises a pressing sheet 34, a teflon sealing bowl 35 and a tray 36 which are distributed in sequence from top to bottom, and the pressing sheet 34 and the tray 36 are connected by screws so as to clamp the teflon sealing bowl 35, and the circular outer edge of the teflon sealing bowl 35 is tightly attached to the inner wall of the cylinder barrel 3.

The cylinder barrel 3 is a metal barrel, and the Teflon sealing bowl 35 has good smoothness, high temperature resistance and wear resistance due to the characteristics of the self material, so that compared with a cylinder structure with lubricating oil, the cylinder structure of the device is simpler, the performance is more stable, the subsequent maintenance is basically not needed, and the device is more leather and durable.

The foregoing description is provided for the purpose of clearly illustrating the utility model and is not to be taken in a limiting sense. Obvious changes and modifications which are extended by the technical proposal of the utility model are still within the protection scope of the utility model.

Claims

1. The utility model provides an inflatable expansion accessory of electric spanner, a serial communication port, the utility model provides a pneumatic wrench, the characteristics include including last casing, lower casing, the cylinder, a piston, the lower extreme of last casing is connected with the upper end of lower casing an organic whole, set firmly a support on the inner wall of last casing, the inboard of support is provided with cylindric installation passageway, be provided with convex recess on the support up end along on the installation passageway, the cyclic lower edge of cylinder sits and establishes on the recess so that the inside wall of cylinder flushes with the inside wall of support installation passageway portion, cover the check valve plate above the cylinder, press from both sides and be equipped with first sealing washer between the cyclic upper edge of cylinder and the lower terminal surface of check valve plate, at least be provided with an air inlet, an gas outlet on the check valve plate respectively, be provided with sealed lid above the check valve plate on at least, set firmly the baffle in order to divide into the inside of sealed lid and the left chamber and the right air chamber that are independent and do not communicate each other on the inner wall of sealed lid, between the lower terminal surface of baffle and the up end of sealed lid, press from both sides same second sealing lid between the up end of sealed lid and the up end of the lower terminal surface of sealed lid and the upper end of check valve plate, it is located the air inlet, the air inlet is located at least one air inlet, the number is fixed for the air inlet port is arranged on the outer wall of the air inlet, the outer wall of the air inlet is fixed at least, the outer wall of the top of the air inlet is arranged at the top of the air inlet is of the top of the air inlet is sealed, and is mounted on the top at least, and outside the top is outside, and is mounted, the lower casing is internally and horizontally provided with a rotatable transmission shaft, the transmission shaft in the lower casing is provided with a reciprocating linkage mechanism capable of enabling the piston to reciprocate up and down, and the right overhanging end of the transmission shaft is provided with a section of multi-edge installation part.

2. The inflatable expansion fitting for an electric wrench according to claim 1, wherein the reciprocating linkage mechanism comprises a connecting rod, an eccentric bearing, a balancing weight and a center bearing, one end of the connecting rod is installed on the lower end face of the piston, the other end of the connecting rod is integrally connected with a buckle, the inner side of the buckle is a circular installation opening, a slit communicated with the installation opening is formed in the lower end face of the buckle, a clamping screw is arranged on the buckle at the slit, an inner ring of the eccentric bearing is installed on a transmission shaft in the lower casing, an outer ring of the eccentric bearing is installed in the installation opening of the buckle through the clamping screw, and the balancing weight is further fixedly arranged on the transmission shaft on the left side of the eccentric bearing.

3. The inflatable expansion fitting for an electric wrench according to claim 1 or 2, wherein the check valve plate comprises a plate, a first elastic sealing sheet, a second elastic sealing sheet and a limiting bar, wherein an air inlet and two air outlets are formed in the middle of the plate in a penetrating manner, the three air outlets are distributed at intervals, the first elastic sealing sheet is arranged on the lower end face of the plate, one end of the first elastic sealing sheet is a free end and is completely covered on the air inlet, the other end of the first elastic sealing sheet is riveted on the lower end face of the plate, the upper end face of the plate is provided with the limiting bar, the long sides of the limiting bar are distributed in front and back, the middle of the limiting bar is riveted between the two air outlets, the front side and the rear side of the limiting bar are respectively located above the air outlets on the corresponding side, a limiting gap is formed between the limiting bar and the air outlets, the second elastic sealing sheet is clamped between the plate and the limiting bar through a middle anchor point of the limiting bar, and the front and the rear free ends of the second elastic sealing sheet are respectively completely covered on the air outlets on the corresponding side.

4. The inflatable expansion fitting for an electric wrench according to claim 1 or 2, wherein a plurality of heat radiation long holes are provided on the outer side walls of the upper and lower cases.

5. The inflatable expansion fitting for an electric wrench as claimed in claim 3, wherein a plurality of heat radiation long holes are provided on the outer side walls of the upper and lower cases.

6. The inflatable expansion fitting for an electric wrench according to claim 1, 2 or 5, wherein the piston comprises a pressing piece, a teflon sealing bowl and a tray which are distributed in sequence from top to bottom, the pressing piece and the tray are connected by screws so as to clamp the teflon sealing bowl, and the circular outer edge of the teflon sealing bowl is tightly attached to the inner wall of the cylinder barrel.

7. The inflatable expansion fitting for an electric wrench according to claim 3, wherein the piston comprises a pressing piece, a teflon sealing bowl and a tray which are distributed in sequence from top to bottom, wherein the pressing piece and the tray are connected by screws so as to clamp the teflon sealing bowl, and the circular outer edge of the teflon sealing bowl is tightly attached to the inner wall of the cylinder barrel.

8. The inflatable expansion fitting for an electric wrench as claimed in claim 4, wherein the piston comprises a pressing piece, a teflon sealing bowl and a tray which are sequentially distributed from top to bottom, wherein the pressing piece and the tray are connected by screws so as to clamp the teflon sealing bowl, and the circular outer edge of the teflon sealing bowl is tightly attached to the inner wall of the cylinder barrel.