CN211729056U

CN211729056U - Swing shovel convenient to change saw bit

Info

Publication number: CN211729056U
Application number: CN201922447558.5U
Authority: CN
Inventors: 沈子斌; 潘玉杰; 祁建刚
Original assignee: Jiangsu Jinding Electric Appliance Co ltd
Current assignee: Jiangsu Jinding Electric Appliance Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-23
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to the technical field of electric tools, in particular to a swing shovel convenient for replacing saw blades, which comprises a casing, wherein the working end of the casing is provided with a fast-assembly structure, the fast-assembly structure comprises a spanner and an aluminum head casing, the aluminum head casing is fixed on the casing through screws, the spanner is fixed in a groove of the aluminum head casing through pins, the pins are also fixed with eccentric blocks, a shifting fork is arranged inside an aluminum head casing sleeve, a bearing is arranged in the circle center part of the shifting fork, the bearing is set as a first bearing, the lower part of the first bearing is provided with another bearing, the bearing is set as a second bearing, the first bearing and the second bearing both adopt deep groove ball bearings, the swing shovel further comprises an output shaft, the output shaft is sleeved inside the first bearing and the second bearing, the bottom of the output shaft is provided with a mandril, the rod head part of the mandril supports the tail, a saw blade pressure plate is arranged between the conversion head and the countersunk head screw.

Description

Swing shovel convenient to change saw bit

Technical Field

The utility model belongs to the technical field of electric tool technique and specifically relates to a swing shovel convenient to change saw bit.

Background

A swinging shovel, also known as a universal shovel, is a reciprocating swinging type power tool, and a blade connected with an output shaft is driven to reciprocate by a motor in a casing. The blade at the head is installed through the change to the swing shovel, can realize multiple functions such as cutting, polish, spatula, thick file and polishing, convenient and practical. Cutting is an important function in the use of the swing shovel and is frequently used in the fields of woodworking and buildings. The existing swing shovel is complex in structure, troublesome to install and maintain, constant in speed and incapable of being adjusted at a matched speed according to specific environments.

In order to solve the above problems, the applicant developed a swing shovel with adjustable speed, and applied for a patent of utility model and obtained an authorization from the national intellectual property office in 2011, 12, month and 14, with a patent application number of 201120523605.0. The applicant has found in the course of subsequent developments that the replacement of the blades of the known oscillating shovels is difficult and requires the use of a large number of tools, which is very limiting for the operator, especially in outdoor operations.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the applicant further innovates in the prior art and develops a swing shovel convenient for replacing a saw blade, and the specific technical scheme is as follows:

a swing shovel convenient for replacing a saw blade comprises a machine shell, wherein a quick-assembly structure is arranged at the working end of the machine shell and comprises a wrench and an aluminum head shell, the aluminum head shell is fixed on the machine shell through screws, the wrench is fixed in a groove of the aluminum head shell through pins, the pins are inserted between the aluminum head shell and the wrench to play a role in fixing, the wrench rotates by taking the pins as axes, an eccentric block is further fixed on the pins, a shifting fork is arranged in a sleeve of the aluminum head shell, a bearing is arranged in the circle center part of the shifting fork and is set as a first bearing, the lower part of the first bearing is provided with another bearing and is set as a second bearing, the first bearing and the second bearing both adopt deep groove ball bearings, the output shaft is sleeved in the first bearing and the second bearing, a mandril is arranged at the bottom of the output shaft, the rod head part of the mandril abuts against the tail part of the output shaft, and, a saw blade pressure plate is arranged between the conversion head and the countersunk head screw.

In the technical scheme, the root of the opening gear of the shifting fork is milled with the bottom notch when a part is machined, the root of the opening gear can be ground when the opening gear is ground, and the consistency of the size and the convenience in machining can be ensured. Meanwhile, the spanners of the fast-assembly structure of the swing shovel are connected together through pins, the spanners have eccentric structures, and the tightness and the looseness of the output shaft are adjusted through the locking and the opening of the spanners so as to install and detach the saw blade.

The utility model discloses a further improvement still includes the spill stationary blade, and the stationary blade passes through the fix with screw in the recess of aluminium first shell, firmly fixes aluminium first shell and casing together.

The utility model discloses a further improvement, first bearing is inside to be provided with the steel wire retaining ring for the axle, is provided with the steel wire retaining ring for the hole between first bearing and the second bearing; the lever head part of the ejector rod is sequentially provided with a connecting head, a gasket, a spring and a connecting sleeve in a sleeved mode.

The utility model discloses a further improvement, the pin stretches out and is fixed with the axle sleeve on the outer position of aluminium skull recess, plays further fixed action, and the pin just can not take place the displacement at the horizontal direction like this, influences the locking of spanner and opens.

The utility model has the advantages that: the utility model discloses a locking of spanner with open the tightness and the pine of adjusting the output shaft to the installation with pull down the saw bit, need not use more appurtenance, the operation of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the quick-assembly structure of the present invention.

In the figure, 1-cross pan head screw, 2-wrench, 3-fixing piece, 4-eccentric block, 5-shaft sleeve, 6-aluminum head shell, 7-cross slot pan head self-tapping screw, 8-pin, 9-connecting sleeve, 10-spring, 11-gasket, 12-connecting head, 13-ejector rod, 14-converting head, 15-saw blade pressing plate, 16-countersunk screw, 17-shifting fork, 18-shaft steel wire retaining ring, 19-first bearing, 20-hole steel wire retaining ring, 21-second bearing and 22-output shaft.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.

Example (b): as shown in figures 1 and 2, the swing shovel convenient for replacing a saw blade comprises a machine shell, a working end of the machine shell is provided with a fast-assembly structure, the fast-assembly structure comprises a wrench 2 and an aluminum head shell 6, the aluminum head shell 6 is fixed on the machine shell through a cross-slot pan head self-tapping screw 7, the wrench 2 is fixed in a groove of the aluminum head shell 6 through a pin 8, the pin 8 is inserted between the aluminum head shell 6 and the wrench 2 to play a fixing role, the wrench 2 can rotate by taking the pin 8 as a shaft, an eccentric block 4 is further fixed on the pin 8, a shifting fork 17 is arranged in a sleeve of the aluminum head shell 6, a bearing is arranged in a circle center part of the shifting fork 17 and is set as a first bearing 19, the lower part of the first bearing 19 is provided with another bearing and is set as a second bearing 21, the first bearing and the second bearing both adopt deep groove ball bearings, and further comprises an output shaft 23, the, the bottom of the output shaft 23 is provided with a mandril 13, the head part of the mandril 13 props against the tail part of the output shaft 23, the outer part of the circumference of the tail part of the mandril 13 is fixed with a conversion head 14 through a countersunk screw 16, and a saw blade pressure plate 15 is arranged between the conversion head 14 and the countersunk screw 16. The concave fixing piece 3 is further arranged in the groove of the aluminum head shell 6, and the fixing piece 3 is fixed in the groove of the aluminum head shell 6 through the cross pan head screw 1 to firmly fix the aluminum head shell 6 and the machine shell together.

In the present embodiment, a shaft steel retainer ring 18 is provided inside a first bearing 19, and a hole steel retainer ring 20 is provided between the first bearing 19 and a second bearing 21; the lever head part of the ejector rod 13 is sequentially provided with a connecting head 12, a gasket 11, a spring 10 and a connecting sleeve 9 in a sleeved mode; the shaft sleeve 5 is fixed on the part of the pin 8 extending out of the groove of the aluminum head shell 6 to play a further fixing role, so that the pin 8 cannot displace in the horizontal direction to influence the locking and the opening of the wrench 2.

In the embodiment, the connecting head 12 is fixed at the front end of the ejector rod 13 to clamp the corresponding saw blade on the ejector rod 13, the ejector rod 13 is arranged in the output shaft 23 in a sliding manner, the connecting sleeve 9 is arranged at the front part of the output shaft 23 and is positioned at the rear side of a bearing on the corresponding output shaft 23, and the steel wire retainer ring is in contact with the bearing; the gasket 11 and the spring 10 are arranged on the ejector rod 13, are positioned between the connecting sleeve 9 and the gasket 11 and are in a compressed state; when the wrench 2 is pulled up, the eccentric block 4 pushes the gasket 11 forward to drive the ejector rod 13 to move forward, so that the connector 12 is separated from the ejector rod 13, and the corresponding saw blade is convenient to detach and mount.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A swing shovel convenient for replacing a saw blade is characterized by comprising a machine shell, wherein a quick-assembly structure is arranged at the working end of the machine shell, the quick-assembly structure comprises a wrench and an aluminum head shell, the aluminum head shell is fixed on the machine shell through a screw, the wrench is fixed in a groove of the aluminum head shell through a pin, the pin is inserted between the aluminum head shell and the wrench to play a role in fixing, the wrench rotates by taking the pin as a shaft, an eccentric block is further fixed on the pin, a shifting fork is arranged in a sleeve of the aluminum head shell, a bearing is arranged in a circle center part of the shifting fork and is set as a first bearing, the other bearing is arranged at the lower part of the first bearing and is set as a second bearing, the first bearing and the second bearing both adopt deep groove ball bearings, and an output shaft is sleeved in the first bearing and the second bearing, the saw blade pressing plate is characterized in that a top rod is arranged at the bottom of the output shaft, the head of the top rod props against the tail of the output shaft, a conversion head is fixed outside the circumference of the tail of the top rod through a countersunk screw, and a saw blade pressing plate is arranged between the conversion head and the countersunk screw.

2. The oscillating shovel facilitating blade replacement of claim 1, further comprising a concave fixing piece fixed by a screw in a groove of the aluminum head case to firmly fix the aluminum head case and the housing together.

3. The blade of claim 2 wherein a shaft retaining ring is disposed within the first bearing and a wire retaining ring for the bore is disposed between the first bearing and the second bearing.

4. The swinging shovel with the saw blade convenient to replace as claimed in claim 3, wherein the lever head part of the top rod is provided with a connecting head, a gasket, a spring and a connecting sleeve in sequence.

5. The blade of any one of claims 1 to 4 wherein a bushing is secured to the pin at a location extending beyond the recess in the aluminum skull.