Rotation turn number counting device, impact wrench and railway fastener bolt dismounting wrench

Abstract

The utility model discloses a rotating circle number counting device, an impact wrench and a railway fastener bolt dismounting wrench, and relates to a counter and a wrench using the counter. In order to overcome the problem of inaccurate counting of a rotation turn number counting device of an existing impact wrench, a first inductor and a second inductor are fixed in a central symmetry mode to form a rotating body; the first sensor and the second sensor are both located on rotation paths of the first inductor and the second inductor; the detection signal output end of the first sensor is electrically connected with the first detection signal output end of the processor, and the detection signal output end of the second sensor is electrically connected with the second detection signal output end of the processor; a first counting output / input end of the processor is electrically connected with a counting input / output end of the first sensor counting unit; a second counting output / input end of the processor is electrically connected with a counting input / output end of a second sensor counting unit; the third counting output end of the processor is electrically connected with the counting input end of the total counting unit.

Description

Technical Field

[0001] This utility model relates to a counter and a wrench using the counter. Background Technology

[0002] When using a brushless motor impact wrench for loosening operations, existing wrenches rely solely on their own judgment of changes in the sampled current to control the stopping of loosening during rotation counting, which can lead to excessive loosening of the nut or even its fall off.

[0003] However, if a high-precision sensor such as a shaft encoder is used for counting, the counting device for the number of rotations of the impact wrench will often cause inaccurate counting because the impact wrench rotates at a high speed and vibrates strongly. The impact of the wrench's impact block and its rebound will repeatedly trigger on the same sensor. An overly sensitive high-precision sensor will cause inaccurate counting. Utility Model Content

[0004] The purpose of this invention is to overcome the problem of inaccurate counting of rotations in existing impact wrenches, and to provide a rotation counting device, an impact wrench, and a railway fastener bolt removal wrench.

[0005] This utility model provides a rotation count device, including a first sensor, a second sensor, a first sensing element, a second sensing element, a first sensor counting unit, a second sensor counting unit, a processor, and a total counting unit;

[0006] The first and second sensors are fixed symmetrically at their centers to form a rotating body, and the rotating body can rotate about the axis of symmetry of the first and second sensors.

[0007] Both the first sensor and the second sensor are located on the rotation path of the first sensor and the second sensor.

[0008] The detection signal output terminal of the first sensor is electrically connected to the first detection signal input terminal of the processor, and the detection signal output terminal of the second sensor is electrically connected to the second detection signal input terminal of the processor.

[0009] The processor's first counting output / input terminal is electrically connected to the counting input / output terminal of the first sensor counting unit; the processor's second counting output / input terminal is electrically connected to the counting input / output terminal of the second sensor counting unit; and the processor's third counting output terminal is electrically connected to the counting input terminal of the total counting unit.

[0010] Furthermore, the angle between the line connecting the first sensor to the midpoint of the rotating body and the line connecting the second sensor to the midpoint of the rotating body is greater than 90° and less than 180°.

[0011] Furthermore, both the first and second sensors are Hall effect sensors or proximity sensors.

[0012] Furthermore, both the first and second sensors are metal sheets.

[0013] This utility model also provides an impact wrench, including a wrench fixing part and a wrench rotating mechanism, wherein the wrench rotating mechanism is rotatably engaged with the wrench fixing part;

[0014] It also includes the aforementioned rotation count device;

[0015] The first and second sensors are fixed to the wrench fixing part;

[0016] The first and second sensors are fixed to the wrench rotation mechanism, and the axes of symmetry of the first and second sensors coincide with the rotation axis of the wrench rotation mechanism.

[0017] Furthermore, it also includes sensor mounting brackets;

[0018] The sensor mounting bracket is fixed to the wrench holder;

[0019] The first and second sensors are fixed on the sensor mounting bracket.

[0020] This utility model also provides a railway fastener bolt removal wrench, including two impact wrenches as described above, and a device mounting bracket;

[0021] Both impact wrenches are fixed to the device mounting bracket via wrench fixing parts, and there is a gap between the two impact wrenches.

[0022] The beneficial effects of this utility model are:

[0023] It has a simple structure, long service life, stable and reliable counting, and is suitable for complex and harsh environments;

[0024] By using dual sensors, the repeated triggering of the same sensor by the impact block and rebound during the impact of the brushless motor impact wrench can be eliminated, making the counting more accurate.

[0025] By using dual sensors, the effect of centrifugal force on the output shaft during sensor rotation can be balanced, allowing for more refined control of the number of rotations of the output shaft. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of a rotation counting device according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a railway fastener bolt removal wrench according to the present invention;

[0028] Figure 3 This is a schematic diagram of the electrical structure of a rotation counting device according to the present invention. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Specific Implementation Method 1

[0033] This embodiment of a rotation count device includes a first sensor 1, a second sensor 2, a first sensing element 3, a second sensing element 4, a first sensor counting unit 5, a second sensor counting unit 6, a processor 7, and a total counting unit 8.

[0034] The first sensor 3 and the second sensor 4 are fixed symmetrically at the center to form a rotating body, and the rotating body can rotate around the axis of symmetry of the first sensor 3 and the second sensor 4.

[0035] The first sensor 1 and the second sensor 2 are both located on the rotation path of the first sensor 3 and the second sensor 4;

[0036] The detection signal output terminal of the first sensor 1 is electrically connected to the first detection signal input terminal of the processor 7, and the detection signal output terminal of the second sensor 2 is electrically connected to the second detection signal input terminal of the processor.

[0037] The first counting output / input terminal of the processor 7 is electrically connected to the counting input / output terminal of the first sensor counting unit 5; the second counting output / input terminal of the processor 7 is electrically connected to the counting input / output terminal of the second sensor counting unit 6; and the third counting output terminal of the processor 7 is electrically connected to the counting input terminal of the total counting unit 8.

[0038] Specifically, such as Figure 2 , 3 As shown, the first sensor 3 and the second sensor 4 are connected as one unit and rotate about the axis of symmetry, with a spatial plane angle of 180°. The first sensor 1 and the second sensor 2 are installed at a distance from the sensing object within 80% of the sensor's maximum sensing range, with a spatial plane angle greater than 90° and less than 180°.

[0039] Among them, the first sensor 1 count storage address MDa (first sensor counting unit 5), the second sensor 2 count storage address MDb (second sensor counting unit 6), and the rotation count address MDc (total counting unit 8);

[0040] like Figure 2 As shown, when rotating clockwise.

[0041] S1. When the first sensor 3 reaches the position of the first sensor 1:

[0042] Processor 7 processing logic: Determine if MDb is 1;

[0043] If yes, then MDC is incremented by 1 and MDb is assigned a value of 0; otherwise, MDa is assigned a value of 1.

[0044] S2. When the first sensor 3 reaches the position of the second sensor 2:

[0045] Processor 7 processing logic: Determine if MDa is 1;

[0046] If yes, then MDC is incremented by 1 and MDa is assigned a value of 0; otherwise, MDb is assigned a value of 1.

[0047] S3. When the second sensor 4 reaches the position of the first sensor 1:

[0048] Processor 7 processing logic: Determine if MDb is 1;

[0049] If yes, then MDC is incremented by 1 and MDb is assigned a value of 0; otherwise, MDa is assigned a value of 1.

[0050] S4. When the second sensor 4 reaches the position of the second sensor 2:

[0051] Processor 7 processing logic: Determine if MDa is 1;

[0052] If yes, then MDC is incremented by 1 and MDa is assigned a value of 0; otherwise, MDb is assigned a value of 1.

[0053] The information is summarized in the table below:

[0054]

[0055]

[0056] Based on the above, it can be determined that the ratio of the actual number of rotations to the count in MDC is 1:2.

[0057] If the first sensor 1 and the second sensor 2 generate a count each time they are scanned by the first sensor 3 or the second sensor 4, and the count is eventually transmitted to the MDc, then the actual number of rotations : the count in the MDc = 1:4.

[0058] The two technical solutions mentioned above can be selected according to the needs. Specific Implementation Method Two

[0060] This embodiment is a further explanation of embodiment one. In this embodiment, the angle between the line connecting the first sensor 1 to the midpoint of the rotating body and the line connecting the second sensor 2 to the midpoint of the rotating body is greater than 90° and less than 180°.

[0061] The other technical features of this embodiment are exactly the same as those of Embodiment 1. Specific Implementation Method 3

[0063] This embodiment is a further explanation of embodiment one or two. In this embodiment, the first sensor 1 and the second sensor 2 are both Hall sensors or proximity sensors.

[0064] The other technical features of this embodiment are exactly the same as those of Embodiment 1 or 2. Specific Implementation Method Four

[0066] This embodiment is a further explanation of embodiment three. In this embodiment, the first sensor 3 and the second sensor 4 are both metal sheets.

[0067] The other technical features of this embodiment are exactly the same as those of Embodiment 3. Detailed Implementation Method Five

[0069] An impact wrench according to this embodiment includes a wrench fixing part 9 and a wrench rotating mechanism 10, wherein the wrench rotating mechanism 10 is rotatably engaged with the wrench fixing part 9.

[0070] It also includes the rotation count device of embodiment four;

[0071] The first sensor 1 and the second sensor 2 are fixed to the wrench fixing part 9;

[0072] The first sensor 3 and the second sensor 4 are fixed to the wrench rotation mechanism 10, and the axis of symmetry of the first sensor 3 and the second sensor 4 coincides with the rotation axis of the wrench rotation mechanism 10.

[0073] The other technical features of this embodiment are exactly the same as those of embodiment four.

[0074] Specifically, such as Figure 1 As shown, this embodiment includes a device mounting bracket 11, a wrench fixing part 9, a first sensor 1, a second sensor 2, a sensor mounting bracket 12, and a wrench rotation mechanism 10 (including a wrench output adapter 13, a central connecting rod 14, a sleeve 15, and a spring 16).

[0075] The wrench fixing part 9 is bolted to the device mounting bracket 11. The sensor mounting bracket 12 is bolted to the device mounting bracket 11. The first sensor 1 and the second sensor 2 are mounted on the sensor mounting bracket 12. The upper end of the wrench output adapter 13 is connected to the wrench fixing part 9, and the lower end is connected to the central connecting rod 14. The sleeve 15 is connected to the lower end of the central connecting rod 14. The spring 16 is pre-tightened between the wrench output part 5 and the sleeve 15.

[0076] The first sensor 3 and the second sensor 4 are centrally symmetrically fixed on the wrench output adapter 13, and rotate with the wrench rotation mechanism 10 with the motor output shaft of the wrench as the axis of symmetry. Specific Implementation Method Six

[0078] This embodiment is a further description of embodiment four. In this embodiment, a sensor mounting bracket 12 is also included.

[0079] The sensor mounting bracket 12 is fixed to the wrench fixing part 9;

[0080] The first sensor 1 and the second sensor 2 are fixed on the sensor mounting bracket 12. Detailed Implementation Method Seven

[0082] This embodiment of a railway fastener bolt removal wrench includes two impact wrenches of embodiment four or five, and a device mounting bracket 11.

[0083] Both impact wrenches are fixed to the device mounting bracket 11 via the wrench fixing part 9, and there is a gap between the two impact wrenches.

[0084] The other technical features of this embodiment are exactly the same as those of Embodiment 5.

[0085] Specifically, such as Figure 1 As shown, the railway fastener bolt removal wrench of this embodiment is used to tighten and loosen railway fastener bolts. The railway fastener bolts are fasteners located on both sides of the rail and are used to fix the rail to the sleeper, securing the rail to the sleeper. Therefore, by providing two impact wrenches and aligning them with the railway fastener bolts on both sides of the rail, a set of railway fastener bolts can be operated simultaneously.

[0086] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

Claims

1. A rotation count device, characterized in that, It includes a first sensor (1), a second sensor (2), a first sensor element (3), a second sensor element (4), a first sensor counting unit (5), a second sensor counting unit (6), a processor (7), and a total counting unit (8); The first sensor (3) and the second sensor (4) are fixed in a centrally symmetrical manner to form a rotating body, and the rotating body can rotate around the axis of symmetry of the first sensor (3) and the second sensor (4). The first sensor (1) and the second sensor (2) are both located on the rotation path of the first sensor (3) and the second sensor (4); The detection signal output terminal of the first sensor (1) is electrically connected to the first detection signal input terminal of the processor (7), and the detection signal output terminal of the second sensor (2) is electrically connected to the second detection signal input terminal of the processor. The first counting output / input terminal of the processor (7) is electrically connected to the counting input / output terminal of the first sensor counting unit (5); the second counting output / input terminal of the processor (7) is electrically connected to the counting input / output terminal of the second sensor counting unit (6); and the third counting output terminal of the processor (7) is electrically connected to the counting input terminal of the total counting unit (8).

2. The rotation count device according to claim 1, characterized in that, The angle between the line connecting the first sensor (1) to the midpoint of the rotating body and the line connecting the second sensor (2) to the midpoint of the rotating body is greater than 90° and less than 180°.

3. A rotation count device according to claim 1 or 2, characterized in that, Both the first sensor (1) and the second sensor (2) are Hall sensors or proximity sensors.

4. The rotation count device according to claim 3, characterized in that, Both the first sensor (3) and the second sensor (4) are metal sheets.

5. An impact wrench, comprising a wrench fixing part (9) and a wrench rotating mechanism (10), wherein the wrench rotating mechanism (10) is rotatably engaged with the wrench fixing part (9); Its features are, It also includes the rotation count device as described in claim 4; The first sensor (1) and the second sensor (2) are fixed to the wrench fixing part (9); The first sensor (3) and the second sensor (4) are fixed to the wrench rotation mechanism (10), and the axis of symmetry of the first sensor (3) and the second sensor (4) coincides with the rotation axis of the wrench rotation mechanism (10).

6. An impact wrench according to claim 5, characterized in that, It also includes a sensor mounting bracket (12); The sensor mounting bracket (12) is fixed to the wrench fixing part (9); The first sensor (1) and the second sensor (2) are fixed on the sensor mounting bracket (12).

7. A wrench for removing railway fastener bolts, characterized in that, Includes the two impact wrenches as described in claim 5 or 6, and the device mounting bracket (11); Both impact wrenches are fixed to the device mounting bracket (11) via the wrench fixing part (9), and there is a gap between the two impact wrenches.

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