Pull hammer capable of automatically rebounding

Abstract

The utility model discloses a pull hammer capable of rebounding automatically, which comprises a grab handle and a movable hammer arranged in the grab handle in a sliding mode, the grab handle comprises a sleeve and an adjustable switch arranged in the sleeve, the movable hammer comprises a rod portion, a limiting clamp and an installation head, the limiting clamp and the installation head are respectively arranged on two sides of the rod portion, the limiting clamp is elastically connected with the rod portion, and the installation head is connected with the rod portion. The utility model has the beneficial effects that the movable hammer can automatically rebound and recover to the original position after force is applied, so that the action of repeated resetting is reduced, and more labor is saved.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal hand tools, and in particular to a pull hammer with automatic springback. Background Technology

[0002] Existing sheet metal straightening work involves using a puller / hammer to adjust or correct deformed sheet metal surfaces. Therefore, a suction cup is usually detachably mounted on the front end of the puller / hammer. After the puller / hammer is attached to the sheet metal surface by the suction cup, the appropriate force is applied to adjust or repair the sheet metal surface.

[0003] Existing pullers / hammers typically have springs on the rod. When performing sheet metal straightening, the hand gripping position will shift relative to the puller / hammer, thus generating a pulling force. However, existing pullers / hammers are difficult to control due to the spring rebound force and have significant vibration. Therefore, the inventor proposed the concept of this new invention to improve the defects of existing sheet metal pullers / hammers. Utility Model Content

[0004] In view of the problems of difficulty in controlling the spring return force and large vibration in existing sheet metal hand tools pullers / pull hammers, the inventor provides a pull hammer with automatic return, which includes a handle and a movable hammer. The handle is provided with an adjustable switch at one end. The movable hammer is slidably disposed in the handle, with one end protruding outside the handle. One end of the movable hammer is provided with a positioning sleeve and a limiting clamp, and the positioning sleeve and the limiting clamp are elastically connected. The handle can be adjusted to form a restrained or unrestrained state with the limiting clamp by adjusting the adjustable switch.

[0005] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the handle includes a sleeve, and the adjustable switch is disposed on the sleeve, and the adjustable switch is rotary.

[0006] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the sleeve can limit the rotational position and angle of the adjustable switch.

[0007] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the adjustable switch includes an adjusting ring, one or more wing plates and a positioning ring, wherein the adjusting ring can adjust the angle and drive the wing plates to rotate relative to the positioning ring.

[0008] Preferably, the adjustable pull hammer further includes an outer cover for the adjustable switch, the outer cover being connected to the adjusting ring.

[0009] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the positioning sleeve and the limiting clamp are connected by an elastic cord.

[0010] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the handle has one or more slots on the outer side and is further provided with one or more counterweights.

[0011] Preferably, in the adjustable pull hammer, the handle is further provided with a housing that covers the outside of the handle and the counterweight.

[0012] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein the movable hammer has a rod, and an end cap and a mounting head are sequentially arranged along the rod, the end cap being connected to a sleeve, and the mounting head extending outward from the handle.

[0013] Preferably, the adjustable pull hammer is an automatically rebounding pull hammer, wherein a buffer is further provided between the end cap and the mounting head.

[0014] This utility model also provides an automatically rebounding pull hammer, including a handle and a movable hammer. The movable hammer is slidably disposed inside the handle, with one end protruding outside the handle. One end of the movable hammer is provided with an elastic cord, which is connected to the inside of the handle and the movable hammer respectively, so that the movable hammer can automatically rebound after force is applied.

[0015] Preferably, the pull hammer has an automatic rebound mechanism, wherein the handle is further provided with an adjustable switch, which allows the movable hammer to be in a restrained or unrestrained state with respect to the handle. A magnetic chuck is further provided on the inside of the handle, which can be magnetically attached to the adjustable switch.

[0016] The beneficial effects of this utility model are that the automatically rebounding pull hammer has the following effects:

[0017] 1. The movable hammer of this utility model can automatically spring back and return to its original position after force is applied, reducing the need for repeated reset actions and saving more effort.

[0018] 2. With the addition of an adjustable switch for on / off control, the movable hammer of this utility model provides an additional force application mode, allowing the movable hammer to adjust sheet metal deformation using both elastic and non-elastic methods. Users can also choose the force application mode according to different situations, thereby improving convenience and flexibility. Attached Figure Description

[0019] Figure 1 This is a front view of a spring-loaded pull hammer according to a preferred embodiment of the present invention.

[0020] Figure 2 This is a front exploded view of the handle of a preferred embodiment of the present invention.

[0021] Figure 3This is a front view of the movable hammer in a preferred embodiment of the present invention.

[0022] Figure 4 This is an exploded perspective view of the adjustable switch according to a preferred embodiment of the present invention.

[0023] Figure 5 This is a cross-sectional view of the automatically rebounding pull hammer in a preferred embodiment of the present invention, without activating the adjustable switch.

[0024] Figure 6 This is a partial top cross-sectional view of the adjustable switch, which is a preferred embodiment of the present invention.

[0025] Figure 7 This is a cross-sectional view of the automatically rebounding pull hammer in a preferred embodiment of the present invention when the adjustable switch is activated.

[0026] Figure 8 This is a partial top cross-sectional view of the adjustable switch, which is a preferred embodiment of the present invention. Detailed Implementation

[0027] The following, in conjunction with the accompanying drawings and preferred embodiments of the present invention, further illustrates the technical means adopted by the present invention to achieve its intended purpose.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "one side," "one end," and "one side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0034] First preferred embodiment

[0035] like Figures 1 to 3 As shown, this is the first preferred embodiment of the present invention, which discloses an automatically rebounding pull hammer T, including a handle 10 and a movable hammer 20 slidably disposed in the handle 10.

[0036] Furthermore, such as Figure 2As shown, the handle 10 includes a sleeve 11, multiple counterweights 12, and an outer shell 13. The sleeve 11 is a long, hollow cylindrical body with two separate grooves 110 on its outer side. An adjustable switch 14 is provided at one end of the sleeve 11, and a locking part 112 is provided at the other end. The multiple counterweights 12 are long, semi-circular plates. Preferably, this embodiment has four counterweights 12, which can be respectively set in the two grooves 110 of the sleeve 11. The user can adjust the number of counterweights 12 according to the needs to change the grip feel of the handle 10. The outer shell 13 can be tightly fitted onto the outer side of the sleeve 11 and each counterweight 12 to fix the position of each counterweight 12 and the sleeve 11.

[0037] like Figure 3 As shown, the movable hammer 20 is slidably disposed inside the sleeve 11 of the handle 10, and one end of the movable hammer 20 protrudes outside the handle 10. The movable hammer 20 includes a slender cylindrical rod 21, so as to... Figure 3 For example, the terms "up" and "down" here are only used to describe the positions in the diagram and are not the absolute positions of the components. On the upper side of the rod 21, a positioning sleeve 22 and a limiting clamp 23 are arranged in sequence upwards. On the lower side of the rod 21, an end cap 24, a buffer 25, and a mounting head 26 are arranged in sequence downwards.

[0038] The positioning sleeve 22 and the limiting clamp 23 are elastically connected. More specifically, the positioning sleeve 22 and the limiting clamp 23 are connected by an elastic cord (not shown in the figure). In addition to the elastic cord connection, the positioning sleeve 22 and the limiting clamp 23 can also be replaced by a spring or other elastic element with the same effect, which will not be elaborated here.

[0039] The outer side of the limiting clamp 23 is provided with a slot 231, which can be used to engage with the adjustable switch 14 of the sleeve 11.

[0040] The end cap 24 is used to connect to the locking part 112 of the sleeve 11. The end cap 24 can be connected to the locking part 112 by snap-fit ​​or screw-locking, and can be disassembled and separated from the locking part 112.

[0041] The buffer 25 is located between the end cap 24 and the mounting head 26. It is designed with multiple layers of elastic material such as rubber or plastic. When the mounting head 26 rebounds strongly, the buffer 25 can reduce the force of the rebound, thereby reducing the force on the handle 10 and making it easier to hold.

[0042] The mounting head 26 has a mounting groove 261, which can be used to install various types of pull tabs or pull strips, or, depending on the requirements, to convert into a sheet metal pulling tool such as a hook or pull ring. All of these can be used in one piece. The mounting head 26 can be integrally formed or detachable, and the user can adjust the style according to their needs.

[0043] like Figure 2 and Figure 4 As shown, this is the specific style of the adjustable switch 14 in this embodiment. The adjustable switch 14 is a rotary adjustment with a limited position and rotation angle effect. In the limited position, it can be set to clockwise or counterclockwise adjustment as needed, thereby changing the state of the adjustable switch 14.

[0044] The adjustable switch 14 is mounted on the sleeve 11 and partially protrudes from the sleeve 11. It includes an outer cover 141, an adjusting ring 142, a pair of wing plates 143 and a positioning ring 144. The outer cover 141 can be set as needed. In this embodiment, it covers one end of the sleeve 11. For aesthetic purposes, in this embodiment, the material is the same as that of the outer shell 13, and the outer cover 141 may not be provided.

[0045] The adjusting ring 142 is disposed on the inner side of the sleeve 11. It includes a push block 1421 protruding outward and two slots 1422 for positioning and disposed on the inner side. The push block 1421 protrudes outward from the sleeve 11. A slot is provided on the sleeve 11 for the push block 1421 to extend outward. The horizontal length of the slot is the rotation distance of the push block 1421. The rotation angle of the adjusting ring 142 can be limited by the slot of the sleeve 11.

[0046] The outer cover 141 is connected to the push block 1421 of the adjusting ring 142. When the outer cover 141 is rotated, the push block 1421 of the adjusting ring 142 can be moved along the slot at the same time.

[0047] The pair of wing plates 143 are semi-circular and symmetrically arranged above the adjusting ring 142. Each wing plate 143 has a downwardly protruding shaft 1431 at one end and a hollow shaft hole 1432 at the other end.

[0048] The positioning ring 144 is disposed above the pair of wing plates 143, and the two downward protruding positioning shafts 1441 of the positioning ring 144 are respectively inserted into the two shaft holes 1432 of the pair of wing plates 143 at the corresponding positions. When the adjusting ring 142 rotates, it will drive the pair of wing plates 143 to move relative to each other, so that one end of the positioning shaft 1441 protrudes inward or outward with the rotation of the positioning ring 144, thereby producing an adjustment effect.

[0049] The rotation adjustment method described here is a preferred embodiment of this invention. As long as the handle 10 is equipped with a rotatable or toggleable button or knob, the displacement of the component can be further controlled, thereby causing the movable hammer 20 to engage or disengage. For example, mechanical iris structures, photographic aperture adjustment structures, etc., are all within the technical scope of this invention, and will not be listed here.

[0050] The aforementioned adjustment methods are merely examples. As long as the movable hammer can be fixed inside the handle by adjusting the state, it is within the scope of protection of this utility model. For example, such adjustment methods can be different methods such as buckles, ring buckles, magnetic attraction, push-pull, and pressing top buckles. This utility model cannot exhaust all of them, but they are all within the scope that this utility model can claim.

[0051] For details on how to use this utility model, please refer to [link / reference]. Figures 5 to 8 The explanation, Figure 5 and Figure 6 The main description is that when the adjustable switch 14 is not activated, the automatic rebounding hammer T is in a state where the movable hammer 20 is unrestrained and can slide freely within the handle 10.

[0052] Under normal circumstances, i.e., when the adjustable switch 14 is not activated, the movable hammer 20 can slide freely inside the sleeve 11. Due to the restriction of the end cap 24 at the front end of the movable hammer 20, the rod 21 of the movable hammer 20 can protrude outward, directly touching the inner side of the end cap 24 with the positioning sleeve 22. This is the maximum outward extension length of the movable hammer 20. When the user flips the handle 10, the movable hammer 20 can be attracted by gravity and return to its initial position. In this state, the movement of the movable hammer 20 is only affected by the Earth's gravity or the downward push force exerted by the user.

[0053] Therefore, when the movable hammer 20 is connected to the sheet metal recess to be repaired at the mounting head 26, the handle 10 needs to be pulled manually to move the handle 10 upward. At this time, the end cap 24 will be locked into the position of the positioning sleeve 22 and the limiting clamp 23. If the force is greater than the connection force at the sheet metal recess, the movable hammer 20 will separate from the sheet metal part. If the force is less than the connection force at the sheet metal recess, the movable hammer 20 will remain connected. Therefore, the user can control the applied force to confirm how much force is needed to adjust the deformation at the sheet metal recess.

[0054] like Figure 7 and Figure 8 As shown, this is the state of the automatically rebounding pull hammer T after the adjustable switch 14 is activated. That is, the limit clamp 23 of the movable hammer 20 is restrained by the adjustable switch 14, which causes the movable hammer 20 to be pulled by the elastic force when sliding in the handle 10, instead of falling directly.

[0055] When the user rotates the outer cover 141 and moves the adjusting ring 142, or directly moves the adjusting ring 142, the adjusting ring 142 will drive the pair of wing plates 143 to rotate and protrude towards the central axis of the sleeve 11. At this time, the two wing plates 143 will respectively lock into the slots 231 on the outside of the limiting clip 23, so that the limiting clip 23 will be fixed above the handle 10 and cannot move downward.

[0056] like Figure 7 As shown, since there is an elastic cord 27 between the limiting clamp 23 and the positioning sleeve 22, the limiting clamp 23 will still fix the positioning sleeve 22 in the position below it when it is not subjected to external force. When the rod 21 of the movable hammer 20 is stretched outward, the elastic cord 27 will generate elastic force to pull the positioning sleeve 22 back to the initial position of the limiting clamp 23. That is, after the adjustable switch 14 is turned on, the movable hammer 20 will become a state with self-pull-back elastic force, which can save more effort when adjusting sheet metal deformation.

[0057] For example, when one end of the movable hammer 20 needs to be fixed to the sheet metal deformation area through the mounting head 26, when the handle 10 is pulled upward, the rod of the movable hammer 20 is stretched and extended by external force, and the positioning sleeve 22 will disengage from the initial position, causing the elastic cord 27 to be extended. At this time, the limit clamp 23 and the positioning sleeve 22 will generate a strong pull-back force due to the deformation of the elastic cord 27. This pull-back force will be reflected at the sheet metal deformation area and pull the concave part of the sheet metal toward the direction of the handle 10 movement.

[0058] If the pull-back force of the elastic cord 27 is less than the connection force between the movable hammer 20 and the recessed part of the sheet metal, the movable hammer 20 will continue to apply an outward pulling force to the recessed part of the sheet metal until it is deformed.

[0059] If the pull-back force of the elastic cord 27 is greater than the connection force between the movable hammer 20 and the sheet metal recess, the movable hammer 20 will be pulled back to its initial position by the elastic cord 27, and the user will need to reset the connection.

[0060] Second preferred embodiment

[0061] The second preferred embodiment of this utility model is largely the same as the first embodiment, except that the handle of the second preferred embodiment is not provided with an adjustable switch, so the state cannot be changed by adjusting the handle. In this embodiment, the movable hammer is slidably disposed in the handle, but there is an elastic connection between the movable hammer and the handle. More specifically, the movable hammer is connected to the inner side of the handle by an elastic cable at the rod.

[0062] In this way, when the movable hammer is dealing with a dent in the sheet metal, if the suction force at the dent is less than the elastic force of the elastic cable, the movable hammer will be pulled back to its original position by the elastic cable. After the force is applied, the movable hammer can automatically spring back and return to its original position, reducing the need for repeated reset actions and saving more effort.

[0063] Preferably, the shaft of the movable hammer can be fixedly connected to the inside of the handle, or it can be detachably connected to the inside of the handle. Taking the fixed connection as an example, hooks can be provided on the shaft of the movable hammer and the inside of the handle, and the elastic cord can be fixed to the hooks on both sides respectively.

[0064] Taking the detachable connection method as an example, a magnetic chuck can be further provided at the position where the hook is located on the inside of the handle, and a magnet with adjustable magnetic attraction force is provided at the corresponding position of the handle. By adjusting the magnetic attraction force, the end of the movable hammer with the elastic cord can be magnetically attracted to the inside of the handle by the magnetic chuck, or separated from the handle, forming an effect similar to the first embodiment.

[0065] Alternatively, the adjustable switch can be made magnetically controlled, allowing the movable hammer to adhere to the inside of the handle by rotating to open or close the magnetic attraction, and producing a rebound effect through the elastic cord.

[0066] The position of the magnetic attraction can also be changed or adjusted according to different needs. The embodiments of this utility model are only examples and are not the final structure.

[0067] The beneficial effects of this utility model are as follows:

[0068] 1. The aforementioned automatically rebounding pull hammer, wherein the movable hammer can automatically rebound after force is applied and return to its original position, reducing repeated reset actions and saving more effort.

[0069] 2. The resilient pull hammer, under the control of the adjustable switch, has an additional force application mode, allowing the movable hammer to adjust sheet metal deformation using both elastic and non-elastic methods. Users can also choose the force application mode according to different situations, thereby improving convenience and flexibility.

[0070] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A self-reboundable draw-bead, characterized in that, The utility model relates to a kind of adjustable hammer, comprising: Handle, which is provided with adjustable switch at one end; Movable hammer, which is slidably arranged in the handle, wherein one end is protruded outside the handle, one end of the movable hammer is provided with a positioning sleeve and a limiting clamp, and the positioning sleeve and the limiting clamp are elastically connected; The handle forms a restrained or unrestrained state with the limiting clamp by adjusting the adjustable switch.

2. The self-reboundable draw hammer of claim 1, wherein, The handle includes a sleeve, and the adjustable switch is arranged in the sleeve.

3. The self-reboundable draw hammer of claim 2, wherein, The sleeve can limit the rotation position and angle of the adjustable switch.

4. The self-reboundable draw hammer of claim 3, wherein, The adjustable switch includes an adjusting ring, one or more wings and a positioning ring.

5. The self-reboundable draw-beam according to any one of claims 1 to 4, wherein, The positioning sleeve and the limiting clamp are connected by an elastic cord.

6. The self-reboundable draw hammer of any one of claims 1 to 4, wherein, The handle is provided with one or more slots on the outside, and further provided with one or more counterweights.

7. The self-reboundable draw-beam of any one of claims 2 to 4, wherein, The movable hammer has a rod portion, and an end cap and a mounting head are sequentially arranged along the rod portion.

8. The self-reboundable draw hammer of claim 7, wherein, The end cap is connected to the sleeve, and the mounting head protrudes outside the handle.

9. A self-reboundable draw-bead, characterized in that A buffer is further arranged between the end cap and the mounting head. The utility model relates to a kind of adjustable hammer, comprising: Handle; 10. The self-reboundable draw hammer of claim 9, wherein, Movable hammer, which is slidably arranged in the handle, wherein one end is protruded outside the handle, one end of the movable hammer is provided with an elastic cord, and the elastic cord is connected to the inside of the handle and the movable hammer respectively, so that the movable hammer can automatically rebound after being forced. The handle is further provided with an adjustable switch, which forms a restrained or unrestrained state between the movable hammer and the handle. The inside of the handle is further provided with a magnetic suction disc, which can be magnetically attached to the adjustable switch.

Images