TWI844259B - Torque adjustment tool - Google Patents

Abstract

A torque adjustment tool comprises: an inner tube, a front fine-tuning rod is provided on the screw assembly of the inner tube, a spring, an upper tooth block, a lower tooth block, several steel balls, a middle shaft and an adjustment unit are provided inside, wherein the upper tooth block is provided with a through hole in the center, and a plurality of bead grooves are arranged in a ring shape on one end surface, the lower tooth block is provided with a polygonal through hole in the center, and several tooth grooves and several tooth parts are arranged alternately on one end surface, so that the steel balls are accommodated one by one through each of the tooth grooves and each of the bead grooves of the upper tooth block, so that the lower tooth block and the upper tooth block can form a mutual engagement by utilizing the accommodation of the steel balls.

Description

Torque adjustment tool

The present invention relates to a torque adjustment tool with overload protection effect.

According to the known torque adjustment structure, many of them are disclosed in the patent certificate No. I444262 of this country, which includes: an inner tube (1), one end of the inner tube (1) is set as a cylinder (10), and the other end is set as a polygon (11), and the polygon (11) is set as a hexagon. The inner cylinder (10) of the inner tube (1) is provided with an inner screw hole (12), and the wall surface of the cylinder (10) is provided with a fine-tuning fixing hole (12). 3), the fine-tuning fixing hole (13) is connected to the inner screw hole (12), a chamber (14) is provided in the polygonal body (11), an inner screw thread section (15) is provided on the wall surface of the chamber (14), a polygonal through hole (16) is provided between the chamber (14) and the inner screw hole (12) of the inner tube (1), the polygonal through hole (16) can be set as a hexagon, and a slide groove (16) is provided on the wall surface of the polygonal body (11) of the inner tube (1) 7), the slide groove (17) is connected to the chamber (14), and a stop screw (18) is arranged in the slide groove (17); a front fine-tuning rod (2) is arranged at the front end of the inner tube (1), an outer thread section (20) is arranged on the outer wall surface of the front fine-tuning rod (2), and a stepped through hole (21) is arranged in the front fine-tuning rod (2); a spring (3) is arranged between the polygonal through hole (16) of the inner tube (1) and the stepped through hole (21) of the front fine-tuning rod (2). an upper tooth block (4) disposed in the chamber (14) and the polygonal through hole (16) of the inner tube (1); the upper tooth block (4) is configured to be in a polygonal shape in coordination with the polygonal through hole (16) of the inner tube (1); the upper tooth block (4) is provided with a through hole (40); a plurality of upper teeth (41) are provided on one side of the upper tooth block (4); one side of the upper teeth (41) is configured as a vertical surface and the other side is configured as an inclined surface; A lower tooth block (5) is disposed in the chamber (14) of the inner tube (1) and engages with the upper tooth block (4). The lower tooth block (5) is provided with a polygonal through hole (50). A plurality of lower teeth (51) are provided on the mating surfaces of the lower tooth block (5) and the upper tooth block (4). One side surface of the lower teeth (51) is provided as a vertical surface and the other side surface is provided as an inclined surface. A stopper (6) is provided in the chamber (14) of the inner tube (1). 4) and located on one side of the lower tooth block (5), the stopper (6) is provided with a through hole (60), and a screw hole (61) is provided on the wall surface of the stopper (6); a compression member (7) is provided on the inner thread segment (15) of the chamber (14) of the inner tube (1), the compression member (7) is provided with a polygonal through hole (70), and an outer thread segment (71) is provided on the outer wall surface of the compression member (7); an adjusting knob (8) is provided At the rear end of the inner tube (1), the adjusting knob (8) is made of an insulating material. A polygonal groove (80) is provided on the outer end surface of the adjusting knob (8). The polygonal groove (80) can be a quadrilateral. A scale and a number (81) are provided on the outer end surface of the adjusting knob (8). Two inlays (82) are provided on the outer wall surface of the adjusting knob (8). A polygonal groove (80) is provided on the inner end surface of the adjusting knob (8). 3), a polygonal positioning protrusion (84) is provided in the polygonal groove (83); a linking member (9) is provided in the polygonal groove (83) of the adjusting knob (8), the linking member (9) is a polygonal body with the same shape as the polygonal groove (83) of the adjusting knob (8), one end surface of the linking member (9) is provided with a polygonal groove (90), and the other end of the linking member (9) is provided with a polygonal connecting rod (91).

When using, the torque value must be set first. A polygonal tool can be inserted into the polygonal groove (80) on the outer end surface of the adjusting knob (8). The adjusting knob (8) is driven to rotate by the tool. When the adjusting knob (8) rotates, the connecting member (9) is driven to rotate. The connecting member (9) drives the compression member (7) to rotate. The compression member (7) is rotated by its outer thread segment ( When the compression member (71) is screwed with the inner thread segment (15) of the inner tube (1), it will rotate inward or outward of the inner tube (1). When the set torque value is large, the compression member (7) rotates inward and pushes the stop member (6) to move inward. The stop member (6) pushes the lower tooth block (5) to be more closely attached to the side wall surface of the upper tooth block (4), and the upper tooth block (4) is resilient. The elastic resistance of the spring (3) causes the lower tooth (51) of the lower tooth block (5) and the upper tooth (41) of the upper tooth block (4) to engage with each other more tightly, and the torque value is larger; when the set torque value is smaller, the compression member (7) moves outward, and the stopper (6) and the lower tooth block (5) and the upper tooth block (4) are also pushed outward by the elastic resistance of the spring (3). , the engagement between the lower tooth block (5) and the upper tooth block (4) is less tight, and the torque value is smaller; and the set torque value is limited to the moving distance of the stopper (6), and the moving distance of the stopper (6) is limited by the stop screw (18) to the distance in the slide groove (17) of the inner tube (1), so that the torque value stroke set by the torque can be controlled.

However, the above-mentioned known structure still has the following problems in practical application: the upper tooth block (4) and the lower tooth block (5) use the upper clamping tooth (41) and the lower clamping tooth (51) as the torque value setting element, which will be less accurate in transmission because the force-bearing area of the chamfered surface of the upper clamping tooth (41) and the lower clamping tooth (51) is smaller. When the applied force is greater than the set torque value, the upper tooth block (4) and the lower tooth block (5) need to be disengaged from each other by jumping teeth and present an idling state. However, due to the greater friction resistance between the beveled surfaces, it is more difficult for the upper tooth (41) and the lower tooth (51) to jump out, and the sensitivity of the overload protection is not high.

Therefore, the inventor of this invention had this in mind and came up with the idea of creating a device. He then designed it based on his years of experience, conducted many discussions and conducted sample tests, and made many revisions and improvements before launching this invention.

It is known that the torque adjustment structure is less accurate in transmission and the overload protection is not very sensitive. These are the technical problems that need to be solved.

The torque adjustment tool of the present invention comprises: an inner tube, a front fine-adjusting rod, a spring, an upper tooth block, a lower tooth block, several steel balls, a middle shaft and an adjustment unit, wherein one end of the inner tube is provided with an inner screw hole, and the other end is provided with a chamber, the wall surface of the chamber is provided with a first inner thread and a second inner thread, the chamber and the inner screw hole are connected and conducted by a polygonal hole, and the wall surface of the inner tube is provided with at least one slide groove penetrating into the chamber, and at least one screw is provided in the slide groove, the front fine-adjusting rod has an open end and a closed end, and the outer wall of the open end is provided with a threaded section, so that the front fine-adjusting rod can be connected with the inner screw hole of the inner tube by the threaded section. The screw assembly is made of a through hole in the center of the closed end, so that a tool rod such as a screwdriver rod can be inserted into the inner tube through the through hole. The spring is arranged in the inner tube, and one end of the spring abuts against the closed end of the front fine-tuning rod. The upper tooth block is provided with a through hole in the center, and a plurality of bead grooves are arranged in a ring shape on one end surface. The upper tooth block is provided in the chamber and the polygonal hole of the inner tube and abuts against the other end of the spring, and the upper tooth block is provided in a polygonal shape to match the polygonal hole of the inner tube. The lower tooth block is provided with a polygonal through hole in the center, and a plurality of tooth grooves and a plurality of tooth portions are staggered on one end surface. The lower tooth block is provided in the inner tube. The housing chamber is provided with the steel balls for accommodation one by one through the tooth grooves and the ball grooves of the upper tooth block, so that the lower tooth block and the upper tooth block can form a mutual engagement by accommodating the steel balls. A polygonal driving hole is penetrated through the center of the middle shaft, and the middle shaft is penetrated through the polygonal through-hole of the lower tooth block and the through-hole of the upper tooth block, so that the middle shaft can be clamped between the adjusting unit and the lower tooth block through the installation of the adjusting unit. The outer wall of the middle shaft is provided with a polygonal portion of the same shape as the polygonal through-hole, and the polygonal portion is engaged with the polygonal through-hole, so that the tool rod inserted through the through-hole can be clamped. The body is then inserted into the driving hole, so that the lower gear block, the middle shaft and the tool rod body can be connected and move together. The adjustment unit has a positioning ring, a compression member and a stop ring. The outer wall of the positioning ring is provided with at least one screw hole, so that the positioning ring can be locked in the housing chamber through the screw hole. The compression member is provided with a stop ring. The compression member and the stop ring are respectively provided with a first external thread and a second external thread, so that the compression member can be threaded with the first external thread and the first internal thread, and the stop ring can be threaded with the second external thread and the second internal thread, and a polygonal hole is penetrated through the center of the compression member; thereby, the torque adjustment tool can be formed.

The torque adjustment tool of the present invention has a larger force-bearing area on the outer circumferential arc surface of the steel ball relative to the beveled surface. Therefore, when the upper tooth block and the lower tooth block use the steel ball for locking, the transmission will be more certain. The rolling of the steel ball can also greatly reduce the friction resistance, making it easier for the steel ball to be brought out of the tooth groove, and the overload protection has a high sensitivity.

Parts of this invention:

(10): Inner tube

(101): Internal screw hole

(102): Storage room

(103): First internal thread

(104): Second internal thread

(105):Polygonal hole

(106): Chute

(11): Screws

(12): Shrapnel

(20):Front fine-tuning lever

(21): Threaded section

(22):Through the hole

(30): Spring

(40):Upper teeth

(41): Perforation

(42): Bead groove

(50): Lower teeth

(51):Polygonal perforation

(52): Tooth groove

(53): Teeth

(531): Slot

(60):Steel ball

(70):Middle shaft

(71):Drive hole

(72):Polygonal part

(80):Adjustment unit

(81): Positioning ring

(811):Screw hole

(82):Compression parts

(821): First external thread

(822):Polygonal hole

(83): Stop ring

(831): Second external thread

(A): Tool bar

[Figure 1] is a three-dimensional assembly diagram of the present invention.

[Figure 2] is a three-dimensional exploded view of the present invention.

[Figure 3] is a cross-sectional view of the assembly of the present invention.

[Figure 4] is a state diagram of the torque adjustment of the present invention.

[Figure 5] is a diagram of the transmission state when the present invention is in use.

[Figure 6] is the overload protection diagram of the present invention.

[Figure 7] is another preferred embodiment of the present invention.

In order to enable the review committee to have a deeper understanding and knowledge of the purpose, features and effects of this invention, please refer to the [Simple Diagram Description] for details as follows:

Generally, according to the present invention, please refer to Figures 1 to 3, which include: an inner tube (10), a front fine-tuning rod (20), a spring (30), an upper tooth block (40), a lower tooth block (50), a number of steel balls (60), a middle shaft (70) and an adjustment unit (80), wherein one end of the inner tube (10) is provided with an inner screw hole (101), and the other end is provided with a chamber (102), and the wall surface of the chamber (102) is provided with a first inner thread (103) and a second inner thread (104). The inner tube (10) has a groove (104), the chamber (102) and the inner screw hole (101) are connected and conducted by a polygonal hole (105), and the wall surface of the inner tube (10) is provided with at least one slide groove (106) penetrating into the chamber (102), and at least one screw (11) is provided in the slide groove (106), and the front fine-adjusting rod (20) has an open end and a closed end, and the outer wall of the open end is provided with a threaded section (21), so that the front fine-adjusting rod (20) can be adjusted by the threaded section (21) ) is threadedly connected to the inner screw hole (101) of the inner tube (10), a through hole (22) is passed through the center of the closed end, so that a tool rod (A) such as a screwdriver rod can be inserted into the inner tube (10) through the through hole (22), the spring (30) is arranged inside the inner tube (10), one end of the spring (30) is against the closed end of the front fine-tuning rod (20), a through hole (41) is provided in the center of the upper tooth block (40), and a ring-shaped arrangement is arranged on one end surface The upper tooth block (40) is arranged in the chamber (102) and the polygonal hole (105) of the inner tube (10) and abuts against the other end of the spring (30). The upper tooth block (40) is arranged in a polygonal shape to match the polygonal hole (105) of the inner tube (10). The lower tooth block (50) is provided with a polygonal through hole (51) in the center, and a plurality of tooth grooves (52) and a plurality of tooth portions (53) are alternately provided on one end surface. The lower tooth block (50) is The inner tube (10) is provided in the chamber (102) so that the steel balls (60) can be accommodated one by one through the tooth grooves (52) and the ball grooves (42) of the upper tooth block (40), so that the lower tooth block (50) and the upper tooth block (40) can form a mutual engagement by accommodating the steel balls (60). The center of the middle shaft (70) is penetrated by a polygonal driving hole (71). The middle shaft (70) is inserted through the lower tooth block (50). The polygonal through hole (51) and the through hole (41) of the upper tooth block (40) are connected to each other so that the middle shaft (70) can be sandwiched between the adjustment unit (80) and the lower tooth block (50) through the installation of the adjustment unit (80). The outer wall of the middle shaft (70) is provided with a polygonal portion (72) of the same shape as the polygonal through hole (51). The polygonal portion (72) is engaged with the polygonal through hole (51) so that the tool rod body inserted from the through hole (22) can be clamped. (A) Then, the assembly is inserted into the driving hole (71) so that the lower gear block (50), the middle shaft (70) and the tool rod (A) can be connected and move synchronously (please refer to FIG. 5 and FIG. 6 at the same time). The adjustment unit (80) has a positioning ring (81), a compression member (82) and a stop ring (83). The outer wall of the positioning ring (81) is provided with at least one screw hole (811), so that the positioning ring (81) can be locked by the screw hole (811) through the screw (11). The compression member (82) and the stop ring (83) are respectively provided with a first external thread (821) and a second external thread (831) in the chamber (102), so that the compression member (82) can be screwed with the first external thread (821) and the first internal thread (103), and the stop ring (83) can be screwed with the second external thread (831) and the second internal thread (104), and a polygonal hole (822) is penetrated in the center of the compression member (82).

The present invention provides a torque adjustment tool, wherein the inner tube (10) is provided with two slide grooves (106), and the positioning ring (81) is provided with two screw holes (811).

The present invention provides a torque adjustment tool, wherein a screw (11) is disposed in one of the slide grooves (106), and a screw (11) and a spring (12) are disposed in another of the slide grooves (106).

The present invention provides a torque adjustment tool, wherein the polygonal hole (105) and the upper tooth block (40), the polygonal through hole (51) and the polygonal portion (72) are configured to be in matching hexagonal shapes.

The present invention provides a torque adjustment tool, wherein the driving hole (71) and the polygonal hole (822) are hexagonal in shape.

The present invention provides a torque adjustment tool, wherein one side surface of each tooth groove (52) is set as a vertical surface, and the other side surface is set as a bevel surface.

The present invention provides a torque adjustment tool, wherein a groove (531) is provided on the end surface of each tooth portion (53), and the groove (531) provides the steel ball (60) with a limit position, thereby preventing the steel ball (60) from being separated from the lower tooth block (50) and the upper tooth block (40) when rolling, and the groove (531) is simultaneously conductive to the two tooth grooves (52) located on both sides of the tooth portion (53).

The present invention provides a torque adjustment tool, wherein the lower gear block (50) and the middle shaft (70) are made separately (please refer to FIG. 2 for reference).

The present invention provides a torque adjustment tool, wherein the lower gear block (50) and the middle shaft (70) are integrally formed (please refer to FIG. 7 for reference).

In actual use, a polygonal tool is inserted from the stop ring (83) into the polygonal hole (822) of the compression member (82) and rotated (see FIG. 4 ) so that the compression member (82) can be rotated into or outward of the inner tube (10) by the screwing of the first outer thread (821) and the first inner thread (103). When the set torque is reached, the compression member (82) is rotated. When the force value is large, the compression member (82) rotates inward and pushes the positioning ring (81) to move, and the positioning ring (81) pushes the lower tooth block (50) to be closer to the upper tooth block (40). The upper tooth block (40) is elastically supported by the spring (30), so that the lower tooth block (50) and the upper tooth block (40) are more closely connected through the steel ball (60). When the torque value is smaller, the compression member (82) moves outward, and the positioning ring (81), the lower tooth block (50) and the upper tooth block (40) are pushed outward by the elastic force of the spring (30). At this time, the engagement between the lower tooth block (50) and the upper tooth block (40) is loose, and the torque value is smaller. When the tool rod (A) is driven to rotate (see also FIG5 ), if the applied force exceeds the set torque value, the steel ball (60) will be driven out of the tooth groove (52) to form an idle rotation phenomenon, so that the lower tooth block (50) and the upper tooth block (40) cannot be locked by the steel ball (60), thereby achieving the effect of overload protection (see also FIG6 ).

The torque adjustment tool has the following advantages: the outer arc surface of the steel ball (60) has a larger force-bearing area relative to the beveled surface, so when the upper tooth block (40) and the lower tooth block (50) use the steel ball (60) for locking, the transmission will be more certain, and the rolling of the steel ball (60) can also greatly reduce the friction resistance, so that the steel ball (60) can be more easily brought out of the tooth groove (52), and the overload protection sensitivity is high.

However, the above is only a preferred embodiment of the present invention and should not be used to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made within the scope of the patent application for the present invention should still fall within the scope of this invention patent.

(10): Inner tube

(101): Internal screw hole

(102): Storage room

(103): First internal thread

(104): Second internal thread

(105):Polygonal hole

(106): Chute

(11): Screws

(12): Shrapnel

(20):Front fine-tuning lever

(21): Threaded section

(30): Spring

(40):Upper teeth

(41): Perforation

(42): Bead groove

(50): Lower teeth

(51):Polygonal perforation

(52): Tooth groove

(53): Teeth

(531): Slot

(60):Steel ball

(70):Middle shaft

(71):Drive hole

(72):Polygonal part

(80):Adjustment unit

(81): Positioning ring

(811):Screw hole

(82):Compression parts

(821): First external thread

(822):Polygonal hole

(83): Stop ring

(831): Second external thread

Claims (9)

A torque adjustment tool includes: an inner tube, a front fine-tuning rod, a spring, an upper tooth block, a lower tooth block, several steel balls, a middle shaft and an adjustment unit, wherein: One end of the inner tube is provided with an inner screw hole, and the other end is provided with a chamber, the wall of the chamber is provided with a first inner screw thread and a second inner screw thread, the chamber and the inner screw hole are connected by a polygonal hole, and the wall of the inner tube is provided with at least one slide groove penetrating into the chamber, and at least one screw is provided in the slide groove; The front fine-adjustment rod has an open end and a closed end. The outer wall of the open end is provided with a threaded section, so that the front fine-adjustment rod can be threaded with the inner threaded hole of the inner tube through the threaded section. A through hole is passed through the center of the closed end, so that the tool rod body can be inserted into the inner tube through the through hole; The spring is arranged inside the inner tube, and one end of the spring abuts against the closed end of the front fine-tuning rod; The upper tooth block has a through hole in the center, and a plurality of bead grooves are arranged in a ring shape on one end surface. The upper tooth block is arranged in the chamber and the polygonal hole of the inner tube, and abuts against the other end of the spring. The upper tooth block is in a polygonal shape to match the polygonal hole of the inner tube; The lower tooth block is provided with a polygonal through hole in the center, and a plurality of tooth grooves and a plurality of tooth portions are staggered on one end surface. The lower tooth block is provided in the chamber of the inner tube, so that the steel balls can be accommodated one by one through the tooth grooves and the bead grooves of the upper tooth block, so that the lower tooth block and the upper tooth block can form a mutual engagement by accommodating the steel balls; A polygonal driving hole is passed through the center of the middle shaft. The middle shaft is inserted into the polygonal through-hole of the lower tooth block and the through-hole of the upper tooth block, so that the middle shaft can be clamped between the adjustment unit and the lower tooth block through the installation of the adjustment unit. The outer wall of the middle shaft is provided with a polygonal portion of the same shape as the polygonal through-hole. The polygonal portion is engaged with the polygonal through-hole, so that the tool rod body that passes through the through-hole is then inserted into the driving hole, so that the lower tooth block, the middle shaft and the tool rod body can be connected and move together; The adjustment unit has a positioning ring, a compression member and a stop ring. The outer wall of the positioning ring is provided with at least one screw hole, so that the positioning ring can be locked in the chamber through the screw hole. The compression member and the stop ring are provided with a first external thread and a second external thread, respectively, so that the compression member can be screwed with the first external thread and the first internal thread, and the stop ring is screwed with the second external thread and the second internal thread, and a polygonal hole is penetrated in the center of the compression member. The torque adjustment tool as described in claim 1, wherein the inner tube is provided with two slide grooves, and the positioning ring is provided with two screw holes. The torque adjustment tool as described in claim 1, wherein the inner tube is provided with two said slide grooves, and the positioning ring is provided with two said screw holes, and one of the said slide grooves is provided with one said screw, and the other said slide groove is provided with one said screw and a spring. The torque adjustment tool as described in claim 1, wherein the polygonal hole and the upper tooth block, the polygonal through hole and the polygonal portion are provided in matching hexagonal shapes. The torque adjustment tool as described in claim 1, wherein the driving hole and the polygonal hole are hexagonal in shape. The torque adjustment tool as described in claim 1, wherein one side surface of each tooth groove is set as a vertical surface, and the other side surface is set as a bevel surface. As described in claim 1, the torque adjustment tool, wherein a groove is provided on the end surface of each tooth, and the groove is used to provide the steel ball as a limit, so as to prevent the steel ball from being separated from the lower tooth block and the upper tooth block when rolling, and the groove is simultaneously connected to the two tooth grooves located on both sides of the tooth. A torque adjustment tool as described in claim 1, wherein the lower gear block and the middle shaft are made separately. The torque adjustment tool as described in claim 1, wherein the lower gear block and the middle shaft are integrally formed.

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