Tool adapter

Abstract

Tool adapter, with a shaft (10) which has a insertion recess (11); a first sleeve (20) which is essentially tubular and is inserted onto the shaft (10) in a manner slidable relative to the shaft (10), wherein the first sleeve (20) has a connecting end (21); a second sleeve (30) which is inserted into the first sleeve (20) in a manner that allows it to slide relative to the first sleeve (20); an elastic element (40) arranged on the first sleeve (20) or the second sleeve (30) and pressing radially against the other, wherein the elastic element (40) is located between the outer circumferential surface of the first sleeve (20) and the inner circumferential surface of the second sleeve (30); a magnetic element (50) arranged at the connecting end (21); and a limiting mechanism (60) arranged on the shaft (10) and located between the outer circumferential surface of the shaft (10) and the inner circumferential surface of the first sleeve (20), wherein the shaft (10) extends along an axial direction (A), wherein the first sleeve (20) has a blocking section (23) extending radially inwards, and wherein the blocking section (23) and the limiting mechanism (60) can block each other in the axial direction (A); wherein the limiting mechanism (60) is located in the axial direction (A) between the connection end (21) and the blocking section (23).

Description

Technical field

[0001] The invention relates to a tool adapter. State of the art

[0002] From US patent application 2016 / 0 107 299 A1, a connecting element is known that comprises a rod body, at least one locking element, an adjacent assembly, a first elastic element, and a connecting rod. The rod body has an insertion groove with at least one retaining section, at least one radially extended section, and a receiving section. The rod body is further provided with at least one through-hole that communicates with the receiving section. The locking element is inserted into the through-hole and partially projects into the insertion groove. The adjacent assembly encloses an outer surface of the rod body, such that the locking element is clamped between the adjacent assembly and the rod body. The first elastic element rests against the rod body and the adjacent assembly to preload the adjacent assembly in the direction of a lateral position.The connecting rod has at least one radially projecting contact section and an annular groove and is axially movable relative to the rod body into a moving or idle position. Document CA 2 496 073 A1 discloses a conventional bit-holding structure comprising a rod with a combination part and a C-shaped retaining groove; a bit element; a sleeve; and an adjusting sleeve, wherein the adjusting sleeve is designed with an internal thread for locking onto a corresponding external thread of the sleeve and additionally has a long concave groove on the inner wall of the adjusting sleeve. Document CN 2 787 386 Y relates to a connecting rod structure consisting essentially of a rod body, a sliding sleeve, a rear compression spring, a front compression spring, a retaining ring, and a magnet, wherein the front and rear compression springs are arranged in the sliding sleeve.The rod body can be positioned in the sliding sleeve and moved back and forth axially in the sliding sleeve to magnetically tighten and fix a screw and to conveniently replace a tool head.

[0003] A conventional adapter, such as that described in Taiwanese patent no. TW I501841 B, comprises a shaft, a sleeve, a locking element, a casing, and a second elastic element. The sleeve is attached to the outside of the shaft. The outer surface of the sleeve has a first threaded section. One end of the locking element is axially adjustable and screwed onto the first threaded section of the sleeve. The relative position of the locking element and the sleeve can be adjusted by the threaded connection between the locking element and the sleeve. The casing is axially displaceable on the shaft and has a magnetic ring at its front end. The two ends of the second elastic element rest against the rear end of the casing and against a shoulder of the shaft, so that the casing is normally pushed forward.

[0004] However, the sleeve and locking element are threaded, requiring numerous machining steps. Adjusting their relative position involves rotating these threads, making it difficult to quickly move the sleeve and locking element into the desired position. Furthermore, the sleeve is normally positioned forward, protruding from the shaft. When attaching the tool head to the rod body, the sleeve must first be pressed downwards against the spring force of the second elastic element to ensure the sleeve's front end is close to the insertion recess, facilitating installation and alignment. If the sleeve is not pressed downwards, the magnetic ring's hole will be too far from the insertion recess, making it difficult to insert the tool head.Furthermore, the second elastic element can easily bend when the sleeve is pressed due to compression, preventing smooth movement of the sleeve relative to the shaft. This results in numerous assembly problems, making it difficult to quickly insert the tool head into the socket and leading to a more challenging assembly process.

[0005] Therefore, it is necessary to provide a novel and advanced tool adapter to solve the problems mentioned above. Object of the invention

[0006] The object of the invention is to provide a tool adapter that allows multi-stage adjustment, is easy to machine and has a simple design, and can be easily connected to a tool head. Technical solution

[0007] This objective is achieved by the tool adapter of the invention, comprising a shaft having a socket; a first sleeve, which is essentially tubular and is inserted onto the shaft in a displaceable manner relative to the shaft, the first sleeve having a connecting end; a second sleeve, which is inserted onto the first sleeve in a displaceable manner relative to the first sleeve; an elastic element arranged on the first sleeve or the second sleeve and pressing radially against the other, the elastic element being located between the outer circumferential surface of the first sleeve and the inner circumferential surface of the second sleeve; and a magnetic element arranged at the connecting end.and a limiting mechanism arranged on the shaft and located between the outer circumferential surface of the shaft and the inner circumferential surface of the first sleeve, wherein the shaft extends along an axial direction, wherein the first sleeve has a blocking section extending radially inwards, and wherein the blocking section and the limiting mechanism can block each other in the axial direction; wherein the limiting mechanism is located in the axial direction between the connection end and the blocking section. Brief description of the drawings Fig. Figure 1 shows a perspective view of a preferred embodiment of the invention, Fig. 2 shows an exploded view of the preferred embodiment of the invention, Fig. 3 to Fig. Figure 5 shows representations of the movement of the preferred embodiment of the invention. Fig. Figure 6 shows a representation of the operational state of the preferred embodiment of the invention. Detailed description of the preferred embodiment

[0008] The following embodiments illustrate the possible implementation of the present invention, but are not intended to limit the scope of protection of the present invention. The terms "one" or "at least one" in the text do not have a limiting meaning with regard to the number. Depending on requirements, "a plurality" is also possible. Changes to this number are also within the scope of protection of the invention.

[0009] Fig. Figures 1 to 6 show a preferred embodiment of the tool adapter 1 of the invention, comprising a shaft 10, a first sleeve 20, a second sleeve 30, an elastic element 40 and a magnetic element 50.

[0010] The shaft 10 has a socket 11. The first sleeve 20 is essentially tubular and is inserted onto the shaft 10 so that it can slide relative to the shaft 10. The first sleeve 20 has a connecting end 21. The second sleeve 30 is inserted onto the first sleeve 20 so that it can slide relative to the first sleeve 20. The elastic element 40 is located on either the first sleeve 20 or the second sleeve 30 and presses radially against the other. The elastic element 40 is located between the outer circumferential surface of the first sleeve 20 and the inner circumferential surface of the second sleeve 30. The elastic element 40 is a C-shaped ring. The magnetic element 50 is located at the connecting end 21. The magnetic element 50 is ring-shaped. A tool head 2 can be easily inserted into the socket 11. Quick, multi-stage adjustment is possible, machining is easy, and the design and operation are simple.In particular, the first sleeve 20 and the second sleeve 30 achieve axially synchronous movement through the radial spring force of the elastic element 40. Furthermore, the first sleeve 20 can be moved and positioned axially relative to the shaft 10 to quickly insert or remove the tool head 2 into or out of the socket 11 and to move the magnetic element 50 forward so that it attracts a fastener 4 that is fixed to the tool head 2. The second sleeve 30 can move relative to the first sleeve 20 to enclose the fastener 4, thus receiving the fastener 4 that has fallen off the tool adapter 2.

[0011] The outer circumferential surface of the first sleeve 20 or the inner circumferential surface of the second sleeve 30 is provided with an annular groove 22. The elastic element 40 engages in the annular groove 22. In this embodiment, the annular groove 22 is formed on the outer circumferential surface of the first sleeve 20. Preferably, the inner circumferential surface of the second sleeve 30 rests radially against the outer circumferential surface of the first sleeve 20 to increase the contact area between the second sleeve 30 and the first sleeve 20 and to achieve stable and smooth simultaneous relative movement. The tool adapter 1 further comprises a limiting mechanism 60. The limiting mechanism 60 is arranged on the shaft 10 and is located between the outer circumferential surface of the shaft 10 and the inner circumferential surface of the first sleeve 20. The shaft 10 extends along an axial direction A. The first sleeve 20 has a blocking section 23 that extends radially inward.The blocking section 23 and the limiting mechanism 60 can block each other in the axial direction A. The limiting mechanism 60 is located in the axial direction A between the connecting end 21 and the blocking section 23. This allows the limiting mechanism 60 to prevent the first sleeve 20 from moving towards the connecting end 21.

[0012] In this embodiment, the outer circumferential surface of the shaft 10 is provided with a first annular groove 12. The limiting mechanism 60 engages in the first annular groove 12. In this embodiment, the limiting mechanism 60 is a C-shaped ring. The limiting mechanism 60 exerts elastic radial pressure against the inner circumferential surface of the first sleeve 20, so that the shaft 10 and the first sleeve 20 can be moved relative to each other and positioned via the limiting mechanism 60.

[0013] The second sleeve 30 has a receiving chamber 31. The first sleeve 20 is inserted into the receiving chamber 31. The axial length of the receiving chamber 31 is greater than the axial length of the first sleeve 20. The second sleeve 30 forms a radial inner flange 32. The first sleeve 20 has a radially extending end surface 24. The inner flange 32 and the end surface 24 can abut each other in the axial direction A, so that the second sleeve 30 is limited by the first sleeve 20 in the axial direction A and cannot detach in the axial direction A towards the magnetic element 50. Preferably, a first maximum distance D1 is defined between the inner flange 32 and the end surface 24. A second maximum distance D2 is defined between the limiting mechanism 60 and the blocking section 23. The first maximum distance D1 is greater than the second maximum distance D2.Therefore, the range of movement of the first sleeve 20 relative to the shaft 10 is smaller than that of the second sleeve 30. When the first sleeve 20 is limited by the limiting mechanism 60, the second sleeve 30 can still move relative to the first sleeve 20 and the shaft 10 and thus protrude from the first sleeve 20 and the shaft 10, so that it can enclose the fastening element 4.

[0014] The tool adapter 1 further comprises a limiting element 70. The limiting element 70 is arranged at the end of the shaft 10 facing away from the insertion recess 11. The second sleeve 30 is limited by the limiting element 70 along the axial direction A in the opposite direction to the insertion recess 11. In this embodiment, the limiting element 70 is a locking ring. A second annular groove 13 is formed on the outer circumferential surface of the shaft 10. The second annular groove 13 is spaced axially A apart from the first annular groove 12. The limiting element 70 engages in the second annular groove 13. This prevents the second sleeve 30 from detaching from the shaft 10 in the opposite direction to the insertion recess 11.

[0015] The connecting end 21 is provided with a receiving recess 26. The magnetic element 50 is arranged in the receiving recess 26 and rests on the bottom of the receiving recess 26, so that the magnetic element 50 can be positioned stably. The bottom of the receiving recess 26 can stably support the magnetic element 50.

[0016] The tool adapter 1 also includes a magnetic piece 80. The magnetic piece 80 is arranged in the shaft 10 and faces the insertion recess 11 in order to magnetically attract the tool head 2 inserted into the insertion recess 11.

[0017] The inner circumferential surface of the first sleeve 20 forms an annular flange 25. The annular flange 25 is located between the magnetic element 50 and one end of the shaft 10. The annular flange 25 can be blocked in the axial direction A by the shaft 10 to prevent the first sleeve 20 from loosening in the opposite direction to the magnetic element 50.

[0018] The shaft 10 is provided with a polygonal recess at the end opposite the insertion recess. The polygonal recess serves to insert a plug rod 3. The plug rod 3 is connected to and driven by a drive tool (e.g., a pneumatic tool).

[0019] In use, the tool head 2 is inserted into the socket 11. The tool head 2 is in contact with the fastening element 4. The second sleeve 30 is axially displaced, which causes the first sleeve 20 to move relative to the shaft 10 in the direction of the fastening element 4 until the magnetic element 50 attracts the fastening element 4 ( Fig. 4) When the locking section 23 of the first sleeve 20 is axially limited by the limiting mechanism 60, it can no longer be moved towards the fastener 4. If the second sleeve 30 is pushed further against the spring force of the elastic element 40 relative to the first sleeve 20, it protrudes from the shaft 10 and thus encloses the fastener 4. In this way, the screwing process can be carried out stably and smoothly. When the fastener 4 is released from the tool joint 2, it is received in the second sleeve 30. The second sleeve 30 can be supported against a base 5 (wall, floor, etc., but not limited to) ( Fig. 6) to provide stable support for the screw connection and to avoid overtightening. Reference symbol list 1 tool adapter 2 Tool head 3 plug-in rods 4 Fastening element 5 Basic 10 shaft 11 Plug recess 12 first ring groove 13 second ring groove 20 first sleeve 21 End of connection 22 Ring groove 23 Blocking section 24 End surface 25 ring flange 26. Admission exemption 30 second sleeve 31. Admission exemption 32 inner flange 40 elastic element 50 magnetic elements 60 Limiting mechanism 70 Boundary element 80 pieces of magnet A axial direction D1 first maximum distance D2 second maximum distance

Claims

[1] Tool adapter, with a shaft (10) which has a insertion recess (11); a first sleeve (20) which is essentially tubular and is inserted onto the shaft (10) in a manner slidable relative to the shaft (10), wherein the first sleeve (20) has a connecting end (21); a second sleeve (30) which is inserted into the first sleeve (20) in a manner that allows it to slide relative to the first sleeve (20); an elastic element (40) arranged on the first sleeve (20) or the second sleeve (30) and pressing radially against the other, wherein the elastic element (40) is located between the outer circumferential surface of the first sleeve (20) and the inner circumferential surface of the second sleeve (30); a magnetic element (50) arranged at the connecting end (21); and a limiting mechanism (60) arranged on the shaft (10) and located between the outer circumferential surface of the shaft (10) and the inner circumferential surface of the first sleeve (20), wherein the shaft (10) extends along an axial direction (A), wherein the first sleeve (20) has a blocking section (23) extending radially inwards, and wherein the blocking section (23) and the limiting mechanism (60) can block each other in the axial direction (A); wherein the limiting mechanism (60) is located in the axial direction (A) between the connection end (21) and the blocking section (23). [2] Tool adapter according to claim 1, characterized by , that the elastic element (40) is a C-shaped ring. [3] Tool adapter according to claim 1, characterized by , that the outer circumferential surface of the first sleeve (20) or the inner circumferential surface of the second sleeve (30) is provided with an annular groove (22), wherein the elastic element (40) engages in the annular groove (22). [4] Tool adapter according to claim 1, characterized by , that the limiting mechanism (60) is a C-shaped ring, wherein the limiting mechanism (60) elastically presses radially against the inner circumferential surface of the first sleeve (20). [5] Tool adapter according to claim 1, characterized by, that the second sleeve (30) has a receiving space (31), wherein the first sleeve (20) is inserted into the receiving space (31), wherein the axial length of the receiving space (31) is greater than the axial length of the first sleeve (20), wherein the second sleeve (30) forms a radial inner flange (32), wherein the first sleeve (20) has a radially extending end surface (24), and wherein the inner flange (32) and the end surface (24) can abut each other in the axial direction (A). [6] Tool adapter according to claim 1, characterized bythat the second sleeve (30) has a receiving space (31), wherein the first sleeve (20) is inserted into the receiving space (31), wherein the axial length of the receiving space (31) is greater than the axial length of the first sleeve (20), wherein the second sleeve (30) forms a radial inner flange (32), wherein the first sleeve (20) has a radially extending end surface (24), wherein the inner flange (32) and the end surface (24) can abut each other in the axial direction (A), wherein a first maximum distance (D1) is defined between the inner flange (32) and the end surface (24), wherein a second maximum distance (D2) is defined between the limiting mechanism (60) and the blocking section (23), and wherein the first maximum distance (D1) is greater than the second maximum distance (D2). [7] Tool adapter according to claim 1, characterized bya limiting element (70), wherein the shaft (10) extends along the axial direction (A), wherein the limiting element (70) is arranged at the end of the shaft (10) facing away from the insertion recess (11), and wherein the second sleeve (30) is limited by the limiting element (70) along the axial direction (A) in the opposite direction to the insertion recess (11). [8] Tool adapter according to claim 1, characterized by , that the shaft (10) extends along the axial direction (A), wherein the inner circumferential surface of the first sleeve (20) forms an annular flange (25), wherein the annular flange (25) is located between the magnetic element (50) and an end of the shaft (10), and wherein the annular flange (25) is lockable in the axial direction (A) by the shaft (10). [9] Tool adapter according to claim 6, characterized bythat the inner circumferential surface of the second sleeve (30) bears radially against the outer circumferential surface of the first sleeve (20); that the elastic element (40) is a C-shaped ring; that the outer circumferential surface of the first sleeve (20) is provided with an annular groove (22), wherein the elastic element (40) engages in the annular groove (22); that the limiting mechanism (60) is a C-shaped ring, wherein the limiting mechanism (60) elastically presses radially against the inner circumferential surface of the first sleeve (20); that the outer circumferential surface of the shaft (10) is provided with a first annular groove (12), wherein the limiting mechanism (60) engages in the first annular groove (12); that a limiting element (70) is provided, wherein the limiting element (70) is arranged at the end of the shaft (10) facing away from the insertion recess (11), and wherein the second sleeve (30) is limited by the limiting element (70) along the axial direction (A) in the opposite direction to the insertion recess (11);that the limiting element is a locking ring; that a second annular groove (13) is formed on the outer circumferential surface of the shaft (10), wherein the second annular groove (13) is spaced axially (A) apart from the first annular groove (12), and wherein the limiting element (70) engages in the second annular groove (13); that the inner circumferential surface of the first sleeve (20) forms an annular flange (25), wherein the annular flange (25) is located between the magnetic element (50) and an end of the shaft (10), and wherein the annular flange (25) can be locked in the axial direction (A) by the shaft (10); that the connecting end (21) is provided with a receiving recess (26), wherein the magnetic element (50) is arranged in the receiving recess (26) and lies on the bottom of the receiving recess (26); and that a magnetic piece (80) is provided, wherein the magnetic piece (80) is arranged in the shaft (10) and faces the insertion recess (11).

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