Single-key pulling clamp for helical gear

Abstract

The utility model relates to a single-key pulling clamp for a helical gear, which solves the problems that the existing clamp fixing structure is easy to loosen due to the vibration generated by a machine tool when in use, so that a positioning piece for positioning the gear shifts left and right, and the machining precision of the gear is influenced, and the single-key pulling clamp for the helical gear comprises a clamp body, the clamp body guides the tooth aligning sliding block assembly in the mode that a linear guide rail is matched with a linear sliding block, transmission is achieved through a transmission lead screw, and the clamp body fixes a helical tooth gear through a single-key tire pulling shaft in a mounting hole. The tooth aligning sliding block assembly comprises a sliding block body in threaded connection with the transmission lead screw and a movable sliding block arranged on the sliding block body, and the end face of a limiting bolt on the outer side face of the sliding block body abuts against the side wall of the movable sliding block. The movable sliding block is provided with a plurality of fixing bolts which penetrate through long holes formed in the movable sliding block in the horizontal direction and then are installed in the fixing threaded holes of the sliding block body in a screwed mode, and the bottom of the movable sliding block is provided with a tooth aligning block used for being matched with a tooth groove of the helical tooth gear.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a helical gear pulling single-key clamp. Background Art

[0002] At present, more and more helical gears are used for mechanical transmission in production and life. Compared with ordinary spur gears, helical gears have low impact vibration noise, smooth transmission and more transmission meshing teeth during use. These characteristics make helical gears more suitable for high-speed and heavy-load occasions than spur gears. Generally, helical gears need to be used in conjunction with transmission shafts. The common connection method between the two is key connection. Therefore, when processing helical gears, a keyway needs to be machined on the inner wall of its center hole, that is, a single key is pulled. The keyway is usually processed by broaching using a broaching machine. During processing, a single key clamp is required to be used to install and position the helical gears to ensure processing accuracy.

[0003] The Chinese utility model patent with authorization announcement number CN214322542U discloses an adjustable positioning tool for drawing a single key groove on the inner wall of the tapered hole of the timing gear, including a clamping body, a clamping component installed on the clamping body for clamping the timing gear, and a positioning mechanism installed on the clamping body, the positioning mechanism is located directly above the clamping component, and the positioning mechanism includes a slide seat, a vertical slider, a transverse tool setting block and a positioning rod; the slide seat has a vertically arranged vertical slide groove, the vertical slider is located in the vertical slide groove and can slide up and down in the vertical slide groove; the transverse tool setting block is temporarily fixed at the lower end of the vertical slider and the fixed position can be adjusted laterally, the positioning rod is vertically fixed on the transverse tool setting block, and the transverse tool setting block is fixed to the vertical slider. The knife block includes a transverse sliding body; the left side of the transverse sliding body has a left U-shaped bolt groove opening to the left side, and the right side of the transverse sliding body has a right U-shaped bolt groove opening to the right side; the bottom of the transverse sliding groove of the vertical sliding block has left and right set threaded holes 1 and 2 with openings facing downwards; there are also bolts 1 and 2 between the transverse sliding body and the vertical sliding block, and the bolts 1 and 2 are respectively screwed into the threaded holes 1 and 2 through the left U-shaped bolt groove and the right U-shaped bolt groove to fix the transverse knife block in the transverse sliding groove of the vertical sliding block; the depth of the left U-shaped bolt groove is equal to the depth of the right U-shaped bolt groove; the bolts 1 and 2 can be simultaneously offset to the left or right in the left U-shaped bolt groove and the right U-shaped bolt groove. The utility model realizes precise positioning of the timing gear by moving the transverse tool block to the left and right. However, after the transverse tool block is adjusted into place, it is fixed only by the clamping force provided by the fixing structure composed of bolts one and two. During processing, the vibration generated by the machine tool can easily cause the fixing structure to loosen, thereby causing the positioning member used for gear positioning to shift to the left and right, affecting the gear processing accuracy. Utility Model Content

[0004] The utility model aims to solve the problem that the fixing structure of the existing clamp is easily loosened due to the vibration generated by the machine tool during use, resulting in the left and right deviation of the positioning piece used for gear positioning, which affects the gear processing accuracy, and provides a helical gear pulling single-key clamp.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A helical gear pulling single-key clamp, which is special in that it includes a clamp body, a linear guide rail, a linear slider, a transmission screw, a single-key tire pulling shaft and a tooth slider assembly;

[0007] The clamp body is provided with a mounting hole, in which the single-key tire pulling shaft is arranged, and the single-key tire pulling shaft is used to cooperate with the center hole of the helical gear and fix the helical gear;

[0008] There are two linear guide rails extending in the vertical direction, and the two linear guide rails are symmetrically arranged on the outer side of the fixture body above the mounting hole;

[0009] The gear slider assembly includes a slider body arranged on the outer side surface of the clamp body and a movable slider arranged on the outer side surface of the slider body, the transmission screw is arranged in the vertical direction, one end of which is rotatably connected to the mounting plate at the top of the clamp body, and the transmission screw is threadedly connected to the slider body; a plurality of linear sliders are arranged on the inner side surface of the slider body, and the plurality of linear sliders are symmetrically arranged about the middle dividing plane of the slider body in the vertical direction, and at least one is arranged on each side, and the linear slider on each side is respectively matched with the corresponding linear guide rails; two guide blocks are relatively arranged on the outer side surface of the slider body and on both sides of the movable slider, and a limiting bolt is screwed into the threaded hole on each guide block, and the end face of the limiting bolt abuts against the side wall of the movable slider; a plurality of fixing bolts are arranged on the movable slider, and each fixing bolt passes through a long hole opened in the horizontal direction on the movable slider and is screwed into a fixed threaded hole opened on the outer side surface of the slider body, and a gear block for matching with the tooth groove of the helical gear is arranged on the bottom of the movable slider.

[0010] Furthermore, a sleeve is arranged in the mounting hole, a first connecting flange is arranged on the outer circumference of the sleeve, the first connecting flange is connected to the clamp body by bolts, the single-key tire pulling shaft is coaxially arranged in the sleeve, and a second connecting flange is arranged on the outer circumference of the single-key tire pulling shaft, the second connecting flange is connected to the sleeve by bolts, a positioning flat key is arranged on the outer wall of the sleeve, a positioning groove matched with the positioning flat key is arranged on the second connecting flange, and the positioning flat key is located in the positioning groove.

[0011] Furthermore, the tooth block includes a base and a tooth head, the base is L-shaped, including a vertical plate connected to the bottom of the movable slider and a horizontal plate arranged at the bottom of the vertical plate, a threaded hole is arranged on the horizontal plate in the vertical direction, the screw of the tooth head is screwed into the threaded hole, and a locking nut is screwed on the screw, and the locking nut abuts against the top surface of the horizontal plate.

[0012] Furthermore, the mounting plate is fixed to the top of the fixture body by bolts, a through hole is opened in the center of the mounting plate in the vertical direction, a bearing seat is connected to the through hole, and the transmission screw is coaxially arranged in the bearing in the bearing seat.

[0013] Furthermore, the transmission screw is a trapezoidal screw, and a transmission nut is provided on the inner side surface of the slider body, and the transmission screw is threadedly connected to the slider body through the transmission nut.

[0014] Furthermore, a hand wheel is connected to the top end of the transmission screw, which facilitates the operator to rotate the transmission screw.

[0015] Furthermore, four fixing bolts are provided and distributed on the movable slider in a rectangular shape, so that the entire movable slider is evenly stressed.

[0016] Furthermore, a machine tool connecting flange is provided on the inner side surface of the clamp body, and the machine tool connecting flange is connected to the clamp body by bolts.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The utility model provides a tooth slider assembly for positioning a helical gear in a helical gear pulling single-key clamp, which comprises a slider body arranged on the outer side surface of the clamp body and a movable slider arranged on the outer side surface of the slider body, the movable slider being fixed to the slider body by a fixing bolt, and the fixing bolt being located in a long hole opened in the horizontal direction of the movable slider, so that the movable slider can be adjusted left and right in the horizontal direction, thereby positioning the helical gear more accurately, and two guide blocks are relatively arranged on the outer side surface of the slider body and on both sides of the movable slider, and a limiting bolt is screwed on the threaded hole of each guide block, and the end face of the limiting bolt abuts against the side wall of the movable slider, so that even if the fixing bolt is loosened, because the limiting bolt abuts against the side wall of the movable slider to limit it, the movable slider will not drive the tooth block to move left and right, thereby ensuring the processing accuracy of the helical gear.

[0019] (2) The utility model provides a helical gear pulling single-key clamp in which the tooth block comprises a base and a tooth head. The screw of the tooth head is screwed into a threaded hole provided on a horizontal plate of the base. In this way, in actual use, the upper and lower positions of the tooth head can be fine-tuned by cooperating with the threaded hole and the screw to ensure that the tooth head and the tooth groove of the helical gear are tightly matched.

[0020] (3) The utility model provides a helical gear pulling single-key clamp in which a sleeve is arranged in the mounting hole of the clamp body, a first connecting flange is arranged on the outer peripheral surface of the sleeve, the first connecting flange is connected to the clamp body by bolts, the single-key tire pulling shaft is coaxially arranged in the sleeve, and a second connecting flange is arranged on the outer peripheral surface of the single-key tire pulling shaft, the second connecting flange is connected to the sleeve by bolts. If the single-key tire pulling shaft is positioned and locked only by bolts, the positioning accuracy will be affected because there will be a certain gap between the bolt and the threaded hole. Therefore, a positioning flat key is arranged on the outer wall of the sleeve, and a positioning groove matched with the positioning flat key is arranged on the second connecting flange. The positioning flat key is located in the positioning groove, and the positioning accuracy is guaranteed by the cooperation between the positioning flat key and the positioning groove.

[0021] (4) The utility model provides a helical gear pulling single-key clamp in which a transmission screw is driven by a trapezoidal screw in cooperation with a transmission nut, and a handwheel is provided at the top of the transmission screw, so that the height adjustment of the slider body is convenient to operate, and a linear guide rail in cooperation with a linear slider is used to guide the movement of the slider body, so that the movement accuracy is high and the movement stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a helical gear pulling single key clamp embodiment of the utility model in use state;

[0023] Figure 2 for Figure 1 A cross-sectional view of

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the tooth slider assembly in the embodiment of the utility model.

[0025] The following are the descriptions of the reference numerals:

[0026] 1- fixture body, 101- mounting plate, 102- bearing seat; 2- linear guide rail, 3- transmission screw, 4- single-key tire pulling shaft, 41- second connecting flange; 5- tooth slider assembly, 51- slider body, 52- moving slider, 53- guide block, 54- limiting bolt, 55- fixing bolt, 56- tooth block, 561- base, 562- tooth head; 6- linear slider, 7- sleeve, 71- first connecting flange; 8- positioning flat key, 9- transmission nut, 10- handwheel, 11- helical gear, 12- machine tool connecting flange. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 1-Figure 3A helical gear pulling single-key clamp of the utility model comprises a clamp body 1, and a machine tool connecting flange 12 for connecting to a machine tool is arranged on the inner side surface of the clamp body 1, and three inverted T-shaped grooves are radially opened on the machine tool connecting flange 12, and three installation grooves are also opened at corresponding positions of the clamp body 1, and the tail of the bolt penetrates into the inverted T-shaped groove and the screw rod of the bolt passes through the inverted T-shaped groove and is located in the installation groove, and a nut is screwed on the top of the screw rod, so that the clamping body 1 and the machine tool connecting flange 12 are connected together by the bolt, and it is also convenient to disassemble when replacing.

[0029] A mounting hole is provided on the fixture body 1, and the mounting hole is used to install the single-key tire pulling shaft 4. The single-key tire pulling shaft 4 is used to cooperate with the center hole of the helical gear 11 to fix the helical gear 11, so it is necessary to ensure the connection stability and positioning accuracy of the single-key tire pulling shaft 4. Figure 2 As shown, a sleeve 7 fixedly connected to the clamp body 1 is arranged in the mounting hole, a first connecting flange 71 is arranged on the outer peripheral surface of the sleeve 7, the first connecting flange 71 is connected to the clamp body 1 by bolts, the single-key tire pulling shaft 4 is coaxially arranged in the sleeve 7, a second connecting flange 41 for connecting with the sleeve 7 is arranged on the outer peripheral surface of the single-key tire pulling shaft 4, the second connecting flange 41 is connected to the sleeve 7 by bolts, thus ensuring the stable connection of the single-key tire pulling shaft 4, but there will be a gap between the bolts and the threaded holes on the clamp body 1, which will affect the positioning accuracy of the single-key tire pulling shaft 4, so a positioning flat key 8 is connected to the outer wall of the sleeve 7 by bolts, a positioning groove matched with the positioning flat key 8 is arranged on the second connecting flange 41, the positioning flat key 8 is located in the positioning groove, and the positioning accuracy is ensured by the cooperation between the positioning flat key 8 and the positioning groove.

[0030] like Figure 3As shown, the tooth slider assembly 5 for positioning the helical gear 11 includes a slider body 51 arranged on the outer side of the fixture body 1 and a moving slider 52 arranged on the outer side of the slider body 51. In order to realize the left and right sliding of the moving slider 52 in the horizontal direction, four fixing bolts 55 are arranged in a rectangular distribution on the moving slider 52, and fixing threaded holes are opened at corresponding positions on the outer side of the slider body 51, and four long holes opened in the horizontal direction are correspondingly arranged on the moving slider 52. Each fixing bolt 55 passes through the long hole and is screwed into the fixing threaded hole, so that the fixing bolt 55 can be fixed. The movable slider 52 is fixed, and can move left and right by using the horizontal space provided by the long hole, and the four fixing bolts 55 are arranged in a rectangular shape, and the entire movable slider 52 is evenly stressed. In order to prevent the movable slider 52 from shaking left and right after the fixing bolts 55 are loosened, thereby affecting the processing accuracy of the helical gear 11, two guide blocks 53 are arranged on the outer surface of the slider body 51 and on both sides of the movable slider 52. The guide blocks 53 are located in the limiting grooves opened in the horizontal direction on the slider body 51, so that the guide blocks 53 can be limited to prevent them from shaking in the vertical direction. A limiting bolt 54 is screwed into the threaded hole of each guide block 53, and the end face of the limiting bolt 54 abuts against the side wall of the movable slider 52. In this way, even if the fixing bolt 55 is loosened, it will not shake left and right because the limiting bolt 54 abuts against the side wall of the movable slider 52 to limit it. A tooth block 56 is provided at the bottom of the movable slider 52, and the tooth block 56 includes an L-shaped base 561 and a tooth head 562, wherein the tooth head 562 is used to cooperate with the tooth groove of the helical gear 11, and the base 561 includes a vertical plate connected to the bottom of the movable slider 52 and a horizontal plate arranged at the bottom of the vertical plate, and the vertical plate and the horizontal plate are arranged integrally, which improves the structural strength. Sometimes, when the entire slider body 51 is moved into place, because the processing errors of each gear are inconsistent, it may be necessary to fine-tune the tooth head 562 to ensure that it fits with the tooth groove. Therefore, a threaded hole is provided in the vertical direction on the horizontal plate, and the screw of the tooth head 562 is screwed into the threaded hole, so that the upper and lower positions of the tooth head 562 can be fine-tuned by cooperating with the screw and the threaded hole. However, when the machine tool is running, the screw of the tooth head 562 is prone to loosening, so a locking nut is also screwed on the screw, and the locking nut abuts against the top surface of the horizontal plate.

[0031] In order to adjust the height direction of the entire tooth slider assembly 5, this embodiment adopts a screw nut mechanism, wherein the transmission screw 3 adopts a trapezoidal screw, which has high transmission accuracy and good stability, and is suitable for a motion mechanism that frequently changes direction. A hand wheel 10 is connected to the top of the transmission screw 3 to facilitate adjustment by the operator. In order to fix the transmission screw 3, a mounting plate 101 is connected to the top of the clamp body 1 by bolts, and a through hole is opened in the center position of the mounting plate 101 along the vertical direction, and a bearing seat 102 is connected to the through hole. The transmission screw 3 is coaxially arranged in the bearing in the bearing seat 102, and a transmission nut 9 is connected to the inner side of the slider body 51 by bolts. The transmission screw 3 is threadedly connected to the transmission nut 9. When the transmission screw 3 rotates in the bearing, it will drive the transmission nut 9 to move in the vertical direction, and the transmission screw 3 itself will not move in the vertical direction, so that the height position adjustment of the slider body 51 is completed. The transmission nut 9 is a consumable and needs to be replaced after a period of time. The transmission nut 9 is connected to the slider body 51 by bolts for easy replacement.

[0032] In order to ensure that the slider body 51 can move in the vertical direction when the screw-nut mechanism is transmitted, a guiding mechanism is also provided, which includes a linear guide rail 2 and a linear slider 6, wherein the linear guide rail 2 extends in the vertical direction and is symmetrically arranged in two pieces, and the two linear guide rails 2 are fixed to the outer surface of the fixture body 1 by bolts and are located above the mounting holes, and four linear sliders 6 are arranged on the inner surface of the slider body 1, and the four linear sliders 6 are symmetrically arranged about the center plane of the slider body 51 in the vertical direction, and two are arranged on each side, so that the two linear sliders 6 on each side cooperate with the corresponding linear guide rails 2, thereby increasing the force-bearing area and avoiding damage to the linear guide rails 2 and the linear slider 6 due to excessive local force during movement due to too few linear sliders 6.

[0033] When in use, install the helical gear 11 to be processed onto the single-key tire pulling shaft 4, rotate the hand wheel 10, and the transmission screw 3 drives the entire gear slider assembly 5 to move downward, so that the gear head 562 is pressed against the tooth groove of the opposite helical gear 11. After pressing, observe whether it is completely fitted. If not, fine-tune the upper and lower positions of the gear head 562 through the screw of the gear head 562 so that the gear head 562 is fitted with the corresponding tooth groove, and then tighten the locking nut on the gear head 562. After the first helical gear 11 is processed, its symmetry is checked. If it does not meet the requirements, the fixing bolts 55 and the limit bolts 54 are loosened, and the position of the movable slider 52 is adjusted with the help of a detection instrument. After adjustment, the fixing bolts 55 and the limit bolts 54 are tightened to ensure that the limit bolts 54 are pressed against the side wall of the movable slider 52 to ensure the stability of the fixture. Then, the next helical gear 11 is processed and tested again after processing. If it is qualified, the processing is continued. If it is not qualified, the position of the movable slider 52 is readjusted until the processed helical gear 11 is qualified.

[0034] The embodiments described above are merely descriptions of the specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A helical gear pulling single key clamp, characterized by: It comprises a clamp body (1), a linear guide rail (2), a linear slider (6), a transmission screw (3), a single-key tire pulling shaft (4) and a toothed slider assembly (5); The clamp body (1) is provided with a mounting hole, and a single-key tire pulling shaft (4) is arranged in the mounting hole. The single-key tire pulling shaft (4) is used to cooperate with the center hole of the helical gear (11) and fix the helical gear (11); There are two linear guide rails (2) extending in the vertical direction, and the two linear guide rails (2) are symmetrically arranged on the outer surface of the clamp body (1) above the mounting hole; The tooth slider assembly (5) comprises a slider body (51) arranged on the outer side of the clamp body (1) and a movable slider (52) arranged on the outer side of the slider body (51); the transmission screw (3) is arranged in the vertical direction, one end of which is rotatably connected to the mounting plate (101) at the top of the clamp body (1), and the transmission screw (3) is threadedly connected to the slider body (51); a plurality of linear sliders (6) are arranged on the inner side of the slider body (51); the plurality of linear sliders (6) are symmetrically arranged about the middle plane of the slider body (51) in the vertical direction, and at least one is arranged on each side, and the linear sliders (6) on each side are respectively connected to the corresponding linear guide rails (2). Two guide blocks (53) are arranged on the outer side of the slider body (51) and on both sides of the movable slider (52), and a limit bolt (54) is screwed into the threaded hole on each guide block (53), and the end surface of the limit bolt (54) abuts against the side wall of the movable slider (52); a plurality of fixing bolts (55) are arranged on the movable slider (52), and each fixing bolt (55) passes through a long hole opened in the horizontal direction on the movable slider (52) and is screwed into a fixing threaded hole opened on the outer side of the slider body (51); and a counter tooth block (56) for matching with the tooth groove of the helical gear (11) is arranged at the bottom of the movable slider (52).

2. The helical gear pulling single key clamp according to claim 1, characterized in that: A sleeve (7) is arranged in the mounting hole, a first connecting flange (71) is arranged on the outer peripheral surface of the sleeve (7), the first connecting flange (71) is connected to the clamp body (1) by bolts, a single-key tire pulling shaft (4) is coaxially arranged in the sleeve (7), and a second connecting flange (41) is arranged on the outer peripheral surface of the single-key tire pulling shaft (4), the second connecting flange (41) is connected to the sleeve (7) by bolts, a positioning flat key (8) is arranged on the outer wall of the sleeve (7), a positioning groove matched with the positioning flat key (8) is arranged on the second connecting flange (41), and the positioning flat key (8) is located in the positioning groove.

3. The helical gear pulling single key clamp according to claim 2, characterized in that: The tooth block (56) comprises a base (561) and a tooth head (562); the base (561) is L-shaped and comprises a vertical plate connected to the bottom of the movable slider (52) and a horizontal plate arranged at the bottom of the vertical plate; a threaded hole is arranged on the horizontal plate in the vertical direction; a screw rod of the tooth head (562) is screwed into the threaded hole, and a locking nut is screwed onto the screw rod; the locking nut abuts against the top surface of the horizontal plate.

4. The helical gear pulling single key clamp according to claim 3, characterized in that: The mounting plate (101) is fixed to the top of the clamp body (1) by means of bolts, a through hole is provided in the center of the mounting plate (101) along the vertical direction, a bearing seat (102) is connected to the through hole, and the transmission screw (3) is coaxially arranged in the bearing in the bearing seat (102).

5. The helical gear pulling single key clamp according to claim 4, characterized in that: The transmission screw (3) is a trapezoidal screw, and a transmission nut (9) is provided on the inner side surface of the slider body (51). The transmission screw (3) is threadedly connected to the slider body (51) via the transmission nut (9).

6. The helical gear pulling single key clamp according to claim 5, characterized in that: The top end of the transmission screw rod (3) is connected to a hand wheel (10).

7. The helical gear pulling single key clamp according to claim 6, characterized in that: Four fixing bolts (55) are provided and distributed on the movable slider (52) in a rectangular shape.

8. The helical gear pulling single key clamp according to claim 7, characterized in that: A machine tool connecting flange (12) is provided on the inner side surface of the clamp body (1), and the machine tool connecting flange (12) is connected to the clamp body (1) via bolts.

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