Straight grinding machine

Abstract

The utility model relates to a straight grinding machine which comprises a machine shell and a vibration reduction assembly installed on the machine shell, the machine shell comprises a motor cylinder portion containing a motor assembly and a gear box shell connected to the motor cylinder portion, and the vibration reduction assembly comprises a first vibration reduction mechanism installed on the gear box shell and a second vibration reduction mechanism connected to the first vibration reduction mechanism. The first damping mechanism comprises a coupling element attached to the gearbox shell, a bracket element supported by the coupling element, an elastic element abutting against the bracket element and a locking element adjusting the telescopic state of the elastic element, the second damping mechanism comprises a handle element connected to the bracket element, and the locking element is located between the bracket element and the handle element.

Description

[Technical field]

[0001] The utility model relates to the technical field of electric tools, in particular to a straight grinding machine with a vibration reduction component. [Background Technology]

[0002] A straight grinder is an electric tool that is powered by a motor and drives a working wheel at the output end through gear transmission to perform grinding operations. It is highly favored by users because of its high operating efficiency and easy portability.

[0003] At present, when using a straight grinder, most users operate it by grasping the grip with one hand and holding the gear box with the other hand. However, this operation method has the following defects: first, the gear box of the straight grinder will emit a lot of heat after a long period of operation, which is not conducive to the user's grip; second, the straight grinder will cause continuous vibration during operation, which greatly reduces the user experience.

[0004] In view of this, it is determined that it is necessary to provide an improved straight grinder to overcome the shortcomings of the prior art. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a straight grinder with a vibration reduction assembly, which has excellent vibration reduction performance and can improve the operating comfort of the user.

[0006] The utility model solves the problems of the prior art by adopting the following technical solutions: a straight grinding machine, comprising a casing and a vibration damping assembly installed on the casing, the casing comprising a motor barrel for accommodating a motor assembly and a gear box casing connected to the motor barrel, the vibration damping assembly comprising a first vibration damping mechanism installed on the gear box casing and a second vibration damping mechanism connected to the first vibration damping mechanism, the first vibration damping mechanism comprising a coupling element attached to the gear box casing, a bracket element supported on the coupling element, an elastic element abutting against the bracket element, and a locking element for adjusting the telescopic state of the elastic element, the second vibration damping mechanism comprising a handle element connected to the bracket element, and the locking element is located between the bracket element and the handle element.

[0007] A further improved solution is that the coupling element includes a circular ring-shaped clamp and a lug connected to an end of the clamp, and the lug fastens the clamp to the gear box part via a screw.

[0008] A further improvement is as follows: the coupling element is provided with an extension portion, a limiting portion connected to the extension portion, and a support shaft extending from the limiting portion away from the extension portion on the end face of the clamp on one side away from the lug, the bracket element includes a base and support arms connected to both sides of the base, the support shaft is passed through the base, and the base abuts against the limiting portion.

[0009] A further improvement is that the elastic element is sleeved on the support shaft and abuts against the base.

[0010] A further improvement is as follows: a threaded portion is provided at the end of the support shaft, and the locking element moves on the threaded portion and presses against the elastic member.

[0011] A further improved solution is: the support arm has a straight section extending radially outward from the circumferential end surface of the base and an inclined section connected to the straight section, and an obtuse angle is formed between the inclined section and the straight section.

[0012] A further improved solution is: a mounting arm protrudes from the end of the inclined section, the end of the handle element forms a first handle end and a second handle end, and the mounting arm is inserted into the first handle end and the second handle end.

[0013] A further improved solution is: the second vibration damping mechanism includes a sheath element connected to the handle element, and the sheath element is sleeved on the outer end surface of the handle element.

[0014] A further improvement is that the sheath element is made of sponge.

[0015] A further improvement is as follows: the elastic element is a compression spring, and the locking element is a locking nut.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by arranging a vibration reduction assembly having a first vibration reduction mechanism and a second vibration reduction mechanism on the gear box housing of the straight grinder, the vibration transmitted to the user's hand can be weakened, thereby improving the user's experience of operating the straight grinder; the locking element of the first vibration reduction mechanism can adjust the compression degree of the elastic element, thereby achieving control of the vibration magnitude of the straight grinder; the gear box housing of the straight grinder, the first vibration reduction mechanism and the second vibration reduction mechanism are all arranged in a detachable connection mode, which is convenient for the user to disassemble and repair. [Drawings]

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the straight grinding wheel machine in the utility model;

[0019] Figure 2 yes Figure 1 The structural schematic diagram of the straight grinder from another perspective is shown;

[0020] Figure 3 yes Figure 2 Schematic diagram of the exploded view of the vibration reduction assembly in the straight grinder shown.

[0021] Meaning of the reference numerals in the figures:

[0022] Straight grinder 100 housing 1

[0023] Motor barrel 11 Grip 12

[0024] Gearbox housing 13 Vibration reduction assembly 200

[0025] First damping mechanism 2 coupling element 21

[0026] Clamp 211 Screw 211a

[0027] Lug 212 Extension 213

[0028] Limiting portion 214 Support shaft 215

[0029] Threaded portion 215a Bracket element 22

[0030] Base 221 Center hole 221a

[0031] Support arm 222 Straight section 222a

[0032] Inclined section 222b Mounting arm 223

[0033] First through hole 223a Elastic element 23

[0034] Locking element 24 Second vibration damping mechanism 3

[0035] Handle element 31 Handle first end 311

[0036] Handle second end 312 Second through hole 313

[0037] Rivet 314 Sheath element 32

[0038] Sheath first end 321 Sheath second end 322 [Specific implementation method]

[0039] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] Please refer to Figure 1 The embodiment of the utility model relates to a straight grinder 100 for grinding large workpieces. The straight grinder 100 has a three-section housing 1, including a motor barrel 11 for accommodating a motor (not shown), and a gripping portion 12 and a gear box housing 13 detachably connected to both sides of the motor barrel 11. In addition, in order to weaken the vibration transmitted to the user's hand during the operation of the straight grinder 100, a vibration reduction assembly 200 is installed on the periphery of the gear box housing 13. Therefore, when operating the straight grinder 100, the user can hold the gripping portion 12 with one hand and the vibration reduction assembly 200 with the other hand.

[0041] Please refer to Figure 2 and Figure 3 The vibration reduction assembly 200 includes a first vibration reduction mechanism 2 directly sleeved on the gear box housing 13 and a second vibration reduction mechanism 3 connected to the first vibration reduction mechanism 2, and the two are detachable. The first vibration reduction mechanism 2 includes a coupling element 21, a bracket element 22 supported on the coupling element 21, an elastic element 23 abutting against the bracket element 22, and a locking element 24 for adjusting the compression state of the elastic element 23, while the second vibration reduction mechanism 3 is composed of a handle element 31 inserted into the bracket element 22 and a sheath element 32 sleeved on the handle element 31.

[0042] The coupling element 21 is a component of the vibration reduction assembly 200 that directly contacts the gearbox housing 13, and is also the first link of vibration transmission. The coupling element 21 is provided with a ring-shaped clamp 211, however, the clamp 211 is not a complete ring, and there is a fracture on the circumference, and two ends are formed at the fracture, and the lugs 212 that fasten the clamp 211 to the gearbox housing 13 are connected to the two ends.

[0043] Furthermore, the coupling element 21 is provided with an extension portion 213 on the radial outer peripheral surface of the clamp 211 away from the lug 212, the extension portion 213 is a cylindrical body with a relatively small height, the axial end surface of the extension portion 213 is integrally connected with a flat stopper 214, the axial end surface of the stopper 214 is integrally connected with a support shaft 215, and the upper end of the support shaft 215 is provided with a threaded portion 215a, wherein the outer diameter of the stopper 214 should be greater than the outer diameters of the extension portion 213 and the support shaft 215. It is worth noting that the extension portion 213 can be integrally formed with the clamp 211, or can be spliced ​​by structures such as buckles and threads.

[0044] When the coupling element 21 is mounted on the gearbox housing 13, the clamp is firstly put on the outer surface of the gearbox housing 13, at which time the lug 212 and the support shaft 215 are respectively located vertically below and vertically above the gearbox housing 13. Subsequently, the user can use the screw 211a to penetrate the lug 212 to completely fasten the coupling element 21 to the gearbox housing 13.

[0045] Please continue to refer to Figure 2 and Figure 3 The bracket element 22 is the middle part of the vibration reduction element 200, which is connected to the coupling element 21 and the handle element 31 respectively. The bracket element 22 is U-shaped as a whole, including a truncated cone-shaped base 221 and a pair of support arms 222 extending from the outer circumference of the base 221. The base 221 has a central hole 221a running through it, and the support arm 222 is composed of a straight section 222a connected to the outer circumference of the base 221 and an inclined section 222b extending from the straight section 222a at an angle, and the angle formed between the inclined section 222b and the straight section 222a is an obtuse angle. The upper end of the inclined section 222b is also integrally connected to a mounting arm 223, and the mounting arm 223 has a first through hole 223a running through it.

[0046] Next, the installation of the first damping mechanism 2 is described. Since the installation between the coupling element 21 and the gear box housing 13 is described above, it will not be described here. The next step is the installation of the bracket element 22. When the user installs the bracket element 22, the central hole 221a on the base 221 can pass through the support shaft 215 and make the base 221 and the limiter 214 abut, so that the installation arm 223 and the lug 212 are located in the same direction, wherein the base 221 and the support shaft 215 can be selected to have an interference fit to prevent the relative rotation between the bracket element 22 and the support shaft 215. Subsequently, the elastic element 23 is sleeved on the outer side of the support shaft 215 and the elastic element 23 and the base 221 abut, wherein the elastic element 23 is preferably a compression spring. Furthermore, a locking element 24 can be screwed in from the upper end of the support shaft 215 to adjust the degree of compression of the elastic element 23. Specifically, the locking element 24 is a locking nut, which cooperates with the threaded portion 215a at the upper end of the support shaft 215 to achieve up and down movement. When the locking element 24 moves downward, the degree of compression of the elastic element 23 increases, and when the locking element 24 moves upward, the degree of compression of the elastic element 23 decreases.

[0047] Further, the installation of the second vibration reduction mechanism 3 is described: the handle element 31 is formed by bending plastic metal and is in a U-shape as a whole. The handle element 31 is formed with a first handle end 311 and a second handle end 312, and the two are penetrated by a second through hole 313; the sheath element 32 is made of sponge material, which has the same shape as the handle element 31, and is formed with a first sheath end 321 and a second sheath end 322. Since the sheath element 32 has good flexibility, when the sheath element 32 is installed on the handle element 31, the first sheath end 321 can be inserted from the first handle end 311, and finally Then it moves to the second end 312 of the handle, or the second end 322 of the sheath can be inserted from the first end 311 of the handle and finally moved to the second end 312 of the handle. In short, the first end 321 of the sheath is either located at the first end 311 of the handle or at the second end 312 of the handle, and the second end 322 of the sheath is located at a position opposite to the first end 321 of the sheath; when the sheath element 32 is installed on the handle element 31, the mounting arm can be inserted into the first end 311 of the handle and the second end 312 of the handle, and the first through hole 233a and the second through hole 313 are aligned, and finally fastened with a rivet 314.

[0048] When the user holds the straight grinder 100 to work, one of the two hands is held on the sheath element 32. The working process of the vibration reduction assembly 200 is now described: when the vibration is transmitted, it first reaches the bracket element 22 through the coupling element 21. However, thanks to the existence of the elastic element 23, part of the vibration will be absorbed. It should be noted here that the vibration absorption effect of the elastic element 23 is adjustable. In theory, the higher the compression degree of the elastic element 23, the weaker the vibration absorption ability. The user can adjust the elastic element 23 through the locking element 24 according to the actual working conditions; further, the vibration will be transmitted to the handle element 31 through the bracket element 22. Due to the existence of the sheath element 32, the vibration that the user's hand can perceive is further reduced.

[0049] In this embodiment, the vibration reduction assembly can effectively reduce the vibration transmitted from the straight grinder 100 to the user's hand through the first vibration reduction mechanism and the second vibration reduction mechanism, thereby allowing the user to obtain greater operating comfort.

[0050] The utility model is not limited to the above specific implementation. Those skilled in the art can easily understand that there are many alternatives to the straight grinder of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. A straight grinder, comprising a housing and a vibration reduction assembly mounted on the housing, wherein the housing comprises a motor barrel for accommodating a motor assembly and a gear box housing connected to the motor barrel; characterized in that: The vibration damping assembly includes a first vibration damping mechanism installed on the gear box housing and a second vibration damping mechanism connected to the first vibration damping mechanism, the first vibration damping mechanism includes a coupling element attached to the gear box housing, a bracket element supported on the coupling element, an elastic element abutting against the bracket element, and a locking element for adjusting the telescopic state of the elastic element, the second vibration damping mechanism includes a handle element connected to the bracket element, and the locking element is located between the bracket element and the handle element.

2. The straight grinder according to claim 1, characterized in that: The coupling element includes a circular ring-shaped clamp and a lug connected to an end of the clamp, and the lug fastens the clamp to the gear box housing via a screw.

3. The straight grinder according to claim 2, characterized in that: The coupling element is provided with an extension portion, a limiting portion connected to the extension portion, and a support shaft extending from the limiting portion away from the extension portion on the end face of the clamp on one side away from the lug, and the bracket element includes a base and support arms connected to both sides of the base, the support shaft is penetrated by the base, and the base abuts against the limiting portion.

4. The straight grinder according to claim 3, characterized in that: The elastic element is sleeved on the supporting shaft and abuts against the base.

5. The straight grinder according to claim 4, characterized in that: A threaded portion is disposed at the end of the support shaft, and the locking element moves on the threaded portion and presses against the elastic element.

6. The straight grinder according to claim 3, characterized in that: The support arm comprises a straight section extending radially outward from a circumferential end surface of the base and an inclined section connected to the straight section, wherein an obtuse angle is formed between the inclined section and the straight section.

7. The straight grinder according to claim 6, characterized in that: A mounting arm protrudes from the end of the inclined section, the ends of the handle element form a first handle end and a second handle end, and the mounting arm is plugged into the first handle end and the second handle end.

8. The straight grinder according to claim 7, characterized in that: The second vibration reduction mechanism comprises a sheath element connected to the handle element, and the sheath element is sleeved on the outer end surface of the handle element.

9. The straight grinder according to claim 8, characterized in that: The sheath element is made of sponge.

10. The straight grinder according to claim 5, characterized in that: The elastic element is a compression spring, and the locking element is a locking nut.

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