Bench work hammer with adjustable balance weight

Abstract

The utility model discloses a bench work hammer with an adjustable counter weight, which belongs to the technical field of manual tools and comprises a conical head and a handle, opposite sides of the conical head and the handle are respectively provided with a first counter weight slide rail or a second counter weight slide rail, and the outer surface of one end of the handle is connected to the inner surface of the first counter weight slide rail of the conical head. A lead screw is embedded and slidably connected to one side of the second balance weight sliding rail and connected to an internal thread in a connecting hole formed in the middle of the balance weight block through a ball fit thread, a rotating assembly is fixedly connected to the other end of the lead screw, and an adjusting shaft is slidably connected to one side of the rotating assembly; the other end of the adjusting shaft is slidably connected to one end of the handle in a penetrating mode and fixedly connected with an adjusting plate. By adjusting the position of the balancing weight, a user can optimize the gravity center distribution of the hammer head and reduce the arm fatigue caused by long-time use, so that the working efficiency is improved, and the physical output during use is reduced through the flexible adjustment of the balancing weight and the design of the buffer layer.

Description

TECHNICAL FIELD

[0001] The new type belongs to the technical field of hand tools, and particularly relates to a bench hammer with adjustable counterweight. BACKGROUND

[0002] A bench hammer is a common hand tool, mainly used for knocking, assembling, disassembling and other bench work. The following is a detailed introduction to the bench hammer: a bench hammer usually consists of the following two parts: a hammer head, including a hammering part (such as a round head, a flat head) and a tapered head part (used for knocking or positioning), and a handle, used for holding, usually made of wood, metal or composite materials.

[0003] A bench hammer is an indispensable tool in bench work, with various types and wide applications. Correct selection and use of a bench hammer can not only improve work efficiency, but also prolong tool life and ensure work safety. With technological progress, the design and functions of a bench hammer are constantly innovated to provide better user experience. The existing traditional bench hammer has the problems of fixed counterweight and single application scenario. The existing adjustable hammer head scheme mainly relies on external addition or removal of counterweight blocks, and has the defects of low adjustment efficiency and poor stability.

[0004] Therefore, there is a need for a bench hammer that can continuously adjust the counterweight without disassembling parts and can be operated by one hand to solve the problems in the prior art. CONTENT OF THE INVENTION

[0005] The purpose of the new type is to provide a bench hammer with adjustable counterweight to solve the problems in the background art.

[0006] To achieve the above purpose, the new type provides the following technical scheme: a bench hammer with adjustable counterweight, comprising a tapered head and a handle, the tapered head and the handle are respectively provided with a first counterweight sliding rail or a second counterweight sliding rail on opposite sides, the outer surface of one end of the handle is connected to the inner surface of the first counterweight sliding rail of the tapered head, one side of the second counterweight sliding rail is embedded and slidingly connected with a lead screw, the outer surface of the lead screw is provided with external threads, and the internal threads in the connecting hole in the middle of the counterweight block are connected with the external threads through ball engagement, the other end of the lead screw is fixedly connected with a rotating assembly, one side of the rotating assembly is slidingly connected with an adjusting shaft, the other end of the adjusting shaft penetrates through the one end of the handle and is fixedly connected with an adjusting plate.

[0007] It is worth mentioning in the scheme that the second counterweight sliding rail and the counterweight block are both U-shaped.

[0008] It is further worth mentioning that symmetric fixed blocks are fixedly connected to the two ends of the adjusting shaft on one side of the adjusting plate, symmetric fixing members are fixedly connected to the other side of the adjusting plate, the other ends of the fixing members are hingedly connected to the lower ends of the two sides of a U-shaped connecting frame, and a pointer is fixedly connected to the same position of the adjusting shaft on the outer side of the adjusting plate.

[0009] Further need to explain is, the handle other end is equipped with the connecting groove, one side of the connecting groove is equipped with several clamping slots, and the inner surface of the connecting groove can be connected with the outer surface of the adjusting plate, and the inner surface of the clamping slot can be connected with the outer surface of the fixed block, and the tail of the several clamping slots is fixedly connected with the scale.

[0010] As a preferred embodiment, the counterweight blocks are connected in series by elastic connecting members, which are compression springs with a stiffness coefficient of 50-80 N / m.

[0011] As a preferred embodiment, the rotating assembly includes a rotating ring, the front end of which is fixedly connected to the front end of the lead screw, and the rotating ring has a sliding groove inside, and the rotating ring has a first fixed ring or a second fixed ring fixedly connected to the middle of the inner surface at the front and rear ends of the sliding groove, and the opposite sides of the first fixed ring or the second fixed ring are provided with a first limiting slot or a second limiting slot, and the rotating ring has a sliding plate slidingly connected to the middle of the inner surface of the sliding groove, and the middle of both ends of the sliding plate is fixedly connected to a limiting block, one end of the sliding plate is fixedly connected to one end of the adjusting shaft, the other end of the adjusting shaft penetrates and slidingly connects to the through hole provided on one side of the rotating ring, and the edge of one side of the sliding plate is fixedly connected to a return spring, and the other end of the return spring is fixedly connected to the inner surface of the rear end of the rotating ring.

[0012] As a preferred embodiment, the first limiting slot or the second limiting slot is a regular polygon in cross section, and the limiting block is a regular polygon in cross section, and the outer surface of the limiting block can be slidingly connected to the inner surface of the first limiting slot or the second limiting slot.

[0013] As a preferred embodiment, the handle is provided with a polyurethane buffer layer at the connection with the tapered head, and the thickness is 3-5 mm.

[0014] Compared with the prior art, the new type of adjustable counterweight benchwork hammer has at least the following beneficial effects:

[0015] (1) By designing the lead screw and the counterweight blocks, the user can adjust the position of the counterweight blocks according to the needs, change the center of gravity and moment of the hammer head, and adapt to different working scenarios (such as tapping, heavy hitting, etc.), and through the cooperation of the rotating assembly and the adjusting shaft, the adjustment of the counterweight blocks is more convenient and accurate, and through the design of the adjusting plate, the pointer and the scale, the user can intuitively observe the position of the counterweight blocks, and make fine adjustments through the adjusting shaft, improving the convenience of operation and the accuracy of adjustment, and through the cooperation of the pointer and the scale, the quantitative display of the counterweight position is realized.

[0016] (2) The counterweight is connected in series through the elastic connecting piece, and a polyurethane buffer layer is arranged at the connection between the handle and the taper head, which effectively reduces the vibration and impact during use, improves the stability and service life of the tool, and enhances the shock resistance and durability of the tool due to the design of the elastic connecting piece and the polyurethane buffer layer. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front structure of the present application.

[0018] Figure 2 It is a schematic diagram of the rotating assembly structure of the present application.

[0019] Figure 3 It is a schematic diagram of the adjusting plate structure of the present application.

[0020] Figure 4 It is a schematic diagram of the counterweight structure of the present application.

[0021] In the figure: 1, taper head; 101, first counterweight sliding rail; 2, handle; 201, second counterweight sliding rail; 202, connecting groove; 203, clamping groove; 204, scale; 3, lead screw; 4, counterweight; 401, connecting hole; 402, ball; 5, elastic connecting piece; 6, rotating assembly; 601, rotating ring; 602, sliding groove; 603, first fixed ring; 6031, first limiting groove; 604, second fixed ring; 6041, second limiting groove; 605, sliding plate; 606, limiting block; 607, through hole; 608, return spring; 7, adjusting shaft; 8, adjusting plate; 801, fixed block; 802, pointer; 803, fixing piece; 804, connecting frame. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with examples.

[0023] Please refer to Figures 1-4 The present application provides a counterweight-adjustable bench hammer, which comprises a taper head 1 and a handle 2. The opposite sides of the taper head 1 and the handle 2 are respectively provided with a first counterweight sliding rail 101 or a second counterweight sliding rail 201. The outer surface of one end of the handle 2 is connected to the inner surface of the first counterweight sliding rail 101 of the taper head 1. One side of the second counterweight sliding rail 201 is embedded and slidingly connected with a lead screw 3. The outer surface of the lead screw 3 is provided with external threads, which are connected to the internal threads in the connecting hole 401 in the middle of the counterweight 4 through ball 402 engagement threads. The other end of the lead screw 3 is fixedly connected with a rotating assembly 6. One side of the rotating assembly 6 is slidingly connected with an adjusting shaft 7. The other end of the adjusting shaft 7 penetrates through the sliding connection at one end of the handle 2 and is fixedly connected with an adjusting plate 8.

[0024] Further as Figure 1As shown, it is worth noting that the second counterweight sliding rail 201 and the counterweight 4 are both U-shaped, which can further limit the position and movement trajectory of the plurality of counterweights 4.

[0025] Further as shown Figure 3 As shown, it is worth noting that the second counterweight sliding rail 201 and the counterweight 4 are both U-shaped, which can further limit the position and movement trajectory of the plurality of counterweights 4.

[0026] Further as shown Figure 3 As shown, it is worth noting that the second counterweight sliding rail 201 and the counterweight 4 are both U-shaped, which can further limit the position and movement trajectory of the plurality of counterweights 4.

[0027] The present scheme has the following working process: by pulling the connecting frame 804, the adjusting plate 8 is adjusted backward, at this time the limiting block 606 on the rear side of the rotating assembly 6 is embedded in the second limiting groove 6041 in the second fixed ring 604, then the adjusting plate 8 is counterclockwise rotated, the counterweight 4 moves to the handle 2 end, the center of gravity moves backward, suitable for precision work; or clockwise rotate the adjusting plate 8, the counterweight 4 moves to the taper head 1 end, the center of gravity moves forward, suitable for impact work, that is, the impact force increases by 42% when the counterweight moves forward 500g counterweight, the control flexibility increases by 35% when the counterweight moves backward, then the adjusting plate 8 is loosened, the adjusting plate 8 will move forward under the action of the return spring 608, at this time the limiting block 606 on the front side of the rotating assembly 6 is embedded in the first limiting groove 6031 in the first fixed ring 603, and the fixed block 801 at the rear end of the adjusting plate 8 is clamped in the corresponding clamping groove 203.

[0028] According to the above working process: by the second counterweight sliding rail 201 and the counterweight 4 being both U-shaped, the position and movement trajectory of the plurality of counterweights 4 can be further limited, by the U-shaped connecting frame 804, the adjusting plate 8 is conveniently rotated, by the scale 204 and the pointer 802, the rotation angle is clearly defined, and by the connecting groove 202 and the plurality of clamping grooves 203, the position of the adjusting plate 8 and the fixed block 801 is limited.

[0029] Further as shown Figure 1As shown, it is worth noting that the counterweight 4 is connected in series through the elastic connecting piece 5, the elastic connecting piece 5 is a compression spring with a stiffness coefficient of 50-80 N / m, the counterweight 4 is connected in series through the elastic connecting piece 5, and the handle 2 is connected with the taper head 1. The polyurethane buffer layer is arranged at the connection position, which effectively reduces the vibration and impact during use, and improves the stability and service life of the tool.

[0030] Further as Figure 2 As shown, it is worth noting that the rotating assembly 6 includes a rotating ring 601, the front end of the rotating ring 601 is fixedly connected to the front end of the lead screw 3, the inside of the rotating ring 601 is provided with a sliding groove 602, and the inside of the rotating ring 601 is provided with a first fixed ring 603 or a second fixed ring 604 at the middle part of the front and rear ends. The first fixed ring 603 or the second fixed ring 604 is provided with a first limiting groove 6031 or a second limiting groove 6041 on the opposite side, and the sliding plate 605 is slidingly connected to the middle part of the inner surface of the sliding groove 602. The sliding plate 605 is fixedly connected to the limiting block 606 at the middle part of both ends, one end of the sliding plate 605 is fixedly connected to one end of the adjusting shaft 7, the other end of the adjusting shaft 7 penetrates and slidingly connects to the through hole 607 provided on one side of the rotating ring 601, and the sliding plate 605 is fixedly connected to the return spring 608 on one side edge. The other end of the return spring 608 is fixedly connected to the rear end of the inner surface of the rotating ring 601. Through the rotating assembly 6, the user can adjust the position of the counterweight 4 according to the need, change the center of gravity and moment of the taper head 1, and adapt to different working scenes such as tapping and heavy hitting. Through the cooperation of the rotating assembly 6 and the adjusting shaft 7, the adjustment of the counterweight 4 is more convenient and accurate.

[0031] Further as Figure 2 As shown, it is worth noting that the first limiting groove 6031 or the second limiting groove 6041 is a regular polygon in cross section, and the limiting block 606 is a regular polygon in cross section. The outer surface of the limiting block 606 can be slidingly connected to the inner surface of the first limiting groove 6031 or the second limiting groove 6041. Through the shape and connection relationship of the first limiting groove 6031, the second limiting groove 6041 and the symmetrical limiting block 606, the position of the rotating assembly 6, the lead screw 3 and the counterweight 4 can be limited.

[0032] Further as Figure 1 As shown, it is worth noting that the handle 2 is connected with the taper head 1. The polyurethane buffer layer is arranged at the connection position, which effectively reduces the vibration and impact during use, and improves the stability and service life of the tool.

[0033] In summary: by pulling the connecting frame 804, the adjusting plate 8 is adjusted backward, at this time the limiting block 606 on the rear side of the rotating assembly 6 is embedded in the second limiting groove 6041 in the second fixed ring 604, then rotate the adjusting plate 8 counterclockwise, the counterweight block 4 moves to the end of the handle 2, the center of gravity moves backward, suitable for precision work; or rotate the adjusting plate 8 clockwise, the counterweight block 4 moves to the end of the cone head 1, the center of gravity moves forward, suitable for impact work, that is, when the counterweight moves forward, the impact force increases by 42%; when the counterweight moves backward, the control flexibility increases by 35%; then loosen the adjusting plate 8, the adjusting plate 8 will move forward under the action of the return spring 608, at this time the limiting block 606 on the front side of the rotating assembly 6 is embedded in the first limiting groove 6031 in the first fixed ring 603, and the fixed block 801 at the rear end of the adjusting plate 8 is clamped in the corresponding clamping groove 203, the counterweight block 4 is connected in series through the elastic connecting piece 5, and the handle 2 and the cone head 1 are connected with a polyurethane buffer layer, which effectively reduces the vibration and impact during use, improves the stability and service life of the tool, and adjusts the position of the counterweight block 4 according to the needs of the user through the rotating assembly 6, changes the center of gravity and moment of the cone head 1, so as to adapt to different working scenes such as tapping and heavy hitting, and through the cooperation of the rotating assembly 6 and the adjusting shaft 7, the adjustment of the counterweight block 4 is more convenient and accurate, through the shape and connection relationship of the first limiting groove 6031, the second limiting groove 6041 and the symmetrical limiting block 606, the position of the rotating assembly 6, the lead screw 3 and the counterweight block 4 can be limited, and through the design of the polyurethane buffer layer, the shock resistance and durability of the tool are enhanced.

[0034] The basic principles, main features and advantages of the present new type are shown and described above. Those skilled in the art should understand that the present new type is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present new type. Without departing from the spirit and scope of the present new type, various changes and improvements can be made to the present new type, and these changes and improvements all fall within the scope of the claimed present new type. The scope of protection required by the present new type is defined by the appended claims and their equivalents.

Claims

1. A weight-adjustable bench hammer comprising a cone head (1) and a handle (2), characterized in that: The taper head (1) and handle (2) opposite sides are respectively provided with first counterweight slide rail (101) or second counterweight slide rail (201), and the handle (2) one end outer surface is connected to the first counterweight slide rail (101) inner surface of taper head (1), and one side of the second counterweight slide rail (201) is embedded and slidingly connected with the lead screw (3), the lead screw (3) outer surface is provided with external thread, and is connected with the internal thread in the connecting hole (401) in the middle of the counterweight block (4) through the ball (402) engagement thread, and the other end of the lead screw (3) is fixedly connected with the rotating assembly (6), one side of the rotating assembly (6) is slidingly connected with the adjusting shaft (7), the other end of the adjusting shaft (7) penetrates the slidingly connected handle (2) one end, and is fixedly connected with the adjusting plate (8).

2. A counterweight-adjustable bench hammer according to claim 1, wherein: The second counterweight slide rail (201) and counterweight block (4) are both U-shaped.

3. A counterweight adjustable bench hammer as defined in claim 1 wherein: The adjusting plate (8) one side is located in the adjusting shaft (7) both ends fixedly connected with symmetric fixed block (801), and the other side of the adjusting plate (8) is fixedly connected with symmetric fixed part (803), the other end of the fixed part (803) is hinged to the both sides of the lower end of the U-shaped connecting frame (804), and the adjusting plate (8) outside is located in the same position of the adjusting shaft (7) fixedly connected with the pointer (802).

4. A counterweight adjustable bench hammer as defined in claim 3 wherein: The handle (2) other end is provided with connecting groove (202), one side of the connecting groove (202) is provided with a plurality of clamping grooves (203), and the inner surface of the connecting groove (202) can be connected with the outer surface of the adjusting plate (8) slidingly, and the inner surface of the clamping groove (203) can be connected with the outer surface of the fixed block (801) slidingly, the outside of the handle (2) is located in a plurality of clamping grooves (203) tail fixedly connected with scale (204).

5. A counterweight adjustable bench hammer as described in claim 1 wherein: The counterweight blocks (4) are connected in series through the elastic connecting piece (5), the elastic connecting piece (5) is compression spring, and the compression spring stiffness coefficient is 50-80 N / m.

6. A counterweight adjustable bench hammer as described in claim 1 wherein: The rotating assembly (6) comprises a rotating ring (601), the front end of which is fixedly connected to the front end of the screw rod (3), and the inside of the rotating ring (601) is provided with a sliding groove (602), and the inside surfaces of the front and rear ends of the rotating ring (601) are fixedly connected with a first fixed ring (603) or a second fixed ring (604) in the middle, the opposite sides of the first fixed ring (603) or the second fixed ring (604) are provided with a first limiting groove (6031) or a second limiting groove (6041), the middle of the inner surface of the sliding groove (602) is slidingly connected with a sliding plate (605), the middle of the two ends of the sliding plate (605) is fixedly connected with a limiting block (606), one end of the sliding plate (605) is fixedly connected to one end of the adjusting shaft (7), the other end of the adjusting shaft (7) penetrates and slidingly connects the through hole (607) provided on one side of the rotating ring (601), and one side edge of the sliding plate (605) is fixedly connected with a restoring spring (608), and the other end of the restoring spring (608) is fixedly connected to the rear end of the inner surface of the rotating ring (601).

7. A counterweight adjustable bench hammer as defined in claim 6 wherein: The first limiting groove (6031) or the second limiting groove (6041) is a regular polygon in cross section, and the limiting block (606) is a regular polygon in cross section, and the outer surface of the limiting block (606) can be slidingly connected to the inner surface of the first limiting groove (6031) or the second limiting groove (6041).

8. A counterweight adjustable bench hammer as described in claim 1, wherein: The handle (2) and the taper head (1) are connected with a polyurethane buffer layer, and the thickness is 3-5mm.

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