Round handle broach fixing device

Abstract

The utility model discloses a round handle broach fixing device which comprises a first cylinder body, a second cylinder body, a third cylinder body and a fourth cylinder body, the first cylinder body is provided with a through hole axially penetrating through the first cylinder body and a strip-shaped hole radially penetrating through the first cylinder body, and the through hole is communicated with the strip-shaped hole; the through hole is used for placing the round handle broach, and a first limiting structure used for limiting the round handle broach is mounted on the side wall of the through hole; the second limiting structure is arranged in the strip-shaped hole in a penetrating mode and can slide in the length direction of the strip-shaped hole; the second barrel sleeves the first barrel and is connected with the second limiting structure, and the second barrel can lift relative to the first barrel to drive the second limiting structure to slide along the strip-shaped hole; when the second limiting structure makes contact with the first end of the strip-shaped hole, the first limiting structure and the second limiting structure abut against the round handle broach. According to the round handle broach fixing device, operation is convenient, and the stability of the round handle broach after being fixed can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of broaching machine parts, in particular to a round handle broach fixing device. Background Art

[0002] At present, the fixing device of the round shank broach still has the problem of insufficient fixing points and poor stability of the round shank broach, which causes the round shank broach to shake easily during operation, thus affecting the processing quality. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a round handle broach fixing device, which can improve the stability of the round handle broach after being fixed.

[0004] A round handle broach fixing device according to an embodiment of the utility model comprises:

[0005] The first cylinder is provided with a through hole axially penetrating the first cylinder and a strip hole radially penetrating the first cylinder, the through hole is communicated with the strip hole; the through hole is used for inserting a round handle broach, and a first limiting structure for limiting the round handle broach is installed on the side wall of the through hole;

[0006] A second limiting structure is provided through the strip-shaped hole and can slide along the length direction of the strip-shaped hole;

[0007] A second cylinder, sleeved on the first cylinder and connected to the second limiting structure, the second cylinder being lifted relative to the first cylinder to drive the second limiting structure to slide along the strip-shaped hole;

[0008] Wherein, the second cylinder has a first position and a second position. When the second cylinder is in the first position, the first limiting structure and the second limiting structure are both disengaged from the round handle broach. When the second cylinder is in the second position, the first limiting structure and the second limiting structure are both pressed against the round handle broach. The second cylinder is connected to a driving assembly, and the driving assembly is used to drive the second cylinder to switch between the first position and the second position.

[0009] The round handle broach fixing device according to the embodiment of the utility model has at least the following beneficial effects:

[0010] The round shank broach is limited by providing a first limiting structure and a second limiting structure, which effectively increases the contact points with the round shank broach, thereby increasing the stability of the round shank broach; the first limiting structure and the second limiting structure are driven to act synchronously by the second cylinder, thereby reducing the number of structures and lowering the production cost; the round shank broach can be clamped and released by switching the second cylinder between the first position and the second position, with simple steps and easy operation.

[0011] According to some embodiments of the utility model, the second limiting structure includes a cross bar and a top bar, the cross bar is passed through the strip hole and can slide along the strip hole; the top bar is connected to the middle part of the cross bar, and the top bar is arranged in the through hole; the cross bar slides along the length direction of the strip hole to drive the top bar to rise and fall along the through hole.

[0012] According to some embodiments of the present invention, both ends of the cross bar are inserted into the second cylinder, and the cross bar is connected to the second cylinder via a fastener.

[0013] According to some embodiments of the present utility model, a plurality of first limiting structures are provided, and the plurality of first limiting structures are arranged at intervals around the outer circumference of the first cylinder.

[0014] According to some embodiments of the utility model, the side wall of the through hole is provided with a mounting hole connecting the through hole and the outside, and a contact surface is provided in the mounting hole; the first limiting structure includes a clamping pin and a first elastic member, the clamping pin is passed through the mounting hole, and the two ends of the first elastic member are respectively abutted against the clamping pin and the abutting surface.

[0015] According to some embodiments of the utility model, an inner side wall of the second cylinder is provided with an annular groove, and the abutting pin can be partially embedded in the annular groove; and the side walls of the annular groove expand outward.

[0016] According to some embodiments of the utility model, the second cylinder is provided with an air hole connected to the annular groove, and the first cylinder is installed with a cover shell, and the cover shell is arranged on the periphery of the air hole.

[0017] According to some embodiments of the present utility model, the second cylinder is connected to a clamping plate, and the driving member is connected to the clamping plate.

[0018] According to some embodiments of the utility model, the first cylinder includes a base, and the second cylinder includes a sleeve; it also includes a second elastic member, the second elastic member is sleeved on the outer circumference of the first cylinder, and the two ends of the second elastic member are respectively against the base and the sleeve.

[0019] According to some embodiments of the utility model, a clamping strip is installed on the top of the first cylinder, and the clamping strip is connected to the first cylinder via a fastener; the clamping strip is used to limit the circumferential rotation of the round-shank broach.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the assembly of an embodiment of the utility model;

[0024] Figure 3 A cross-sectional view of a second position limiting structure according to an embodiment of the utility model;

[0025] Figure 4 A cross-sectional view of a first limiting structure of an embodiment of the utility model;

[0026] Figure 5 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0028] Figure Number:

[0029] The first cylinder 100, the through hole 110, the strip hole 120, the mounting hole 130, the abutting surface 131, the cover 140, the base 150, the second elastic member 160, the clamping strip 170, and the clamping slot 180;

[0030] A first limiting structure 200, a tightening pin 210, a first elastic member 220, and a latch pin 230;

[0031] A second limiting structure 300, a cross bar 310, and a top bar 320;

[0032] The second cylinder 400 , the annular groove 410 , the air hole 420 , the clamping plate 430 , the sleeve 440 , the first opening 450 , and the second opening 460 . DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 6 The embodiment of the utility model is a round handle broach fixing device, comprising: a first cylinder 100 and a second cylinder 400, wherein the second cylinder 400 is sleeved on the outer periphery of the first cylinder 100 and can be raised and lowered equivalent to the first cylinder 100. The first cylinder 100 is provided with a through hole 110 axially penetrating the first cylinder 100 and a strip hole 120 radially penetrating the first cylinder 100, and the through hole 110 is connected with the strip hole 120; the through hole 110 is used for inserting the round handle broach, and the side wall of the through hole 110 is provided with a first limiting structure 200 for limiting the round handle broach, and the first limiting structure 200 can be partially embedded in the round handle broach, thereby limiting the round handle broach from escaping along the axial direction of the first cylinder 100.

[0038] Further, see Figure 2 As shown, a second limiting structure 300 is provided in the strip hole 120, and the second limiting structure 300 can slide along the length direction of the strip hole 120. After the round handle broach is clamped by the first limiting structure 200, the second limiting structure 300 is pressed against the end of the round handle broach to eliminate the axial movement of the round handle broach. The length direction of the strip hole 120 is the same as the axial direction of the first cylinder 100, that is, the sliding direction of the second limiting structure 300 is the length extension direction of the through hole 110, which is also the same in this embodiment. Figures 1 to 4 Vertical orientation shown.

[0039] Reference Figure 3As shown, the second position-limiting structure 300 in this embodiment includes a cross bar 310 and a top bar 320. The cross bar 310 is inserted into the strip hole 120 and can slide along the strip hole 120. The top bar 320 is connected to the middle of the cross bar 310, and the top bar 320 is detachably connected to the cross bar 310. The detachable connection can be connected by fasteners or the like. The fasteners can be bolts, buckles, and other structures. In this example, the cross bar 310 and the top bar 320 are specifically connected by bolts. The detachable connection between the cross bar 310 and the top bar 320 can facilitate the separate replacement of the cross bar 310 or the top bar 320, thereby effectively reducing the maintenance cost of the second position-limiting structure 300.

[0040] As can be seen from the above, the through hole 110 is connected to the strip hole 120, and the through hole 110 is arranged along the axial direction of the first cylinder 100, and the strip hole 120 is arranged along the radial direction of the first cylinder 100, so the through hole 110 and the strip hole 120 are perpendicular to each other. Since the push rod 320 is arranged in the middle of the cross bar 310, when the cross bar 310 is inserted into the strip hole 120, the push rod 320 is located in the through hole 110, and the size of the push rod 320 is smaller than the inner diameter of the through hole 110, the sliding of the cross bar 310 along the length direction of the strip hole 120 can drive the push rod 320 to rise and fall along the through hole 110,

[0041] Furthermore, both ends of the cross bar 310 in the length direction are penetrated by the second cylinder 400, and the second cylinder 400 is provided with two oppositely arranged first openings 450. The two ends of the cross bar 310 in the length direction are respectively penetrated in the two first openings 450. Therefore, the lifting and lowering of the second cylinder 400 relative to the first cylinder 100 can drive the cross bar 310 to slide along the length direction of the strip hole 120, and then drive the push rod 320 to lift and lower along the through hole 110. When the cross bar 310 slides to contact the topmost position in the length direction of the strip hole 120, the push rod 320 abuts against the bottom end of the round-handled broach located in the through hole 110.

[0042] In the embodiment of the present invention, both ends of the cross bar 310 are not only inserted into the second cylinder 400, but also the cross bar 310 and the second cylinder 400 are connected by fasteners. Specifically, the fasteners are bolts. Figure 1 , Figure 5 As shown, the second cylinder 400 is further provided with a second opening 460, the length extension direction of the second opening 460 is perpendicular to the length extension direction of the first opening 450, and the second opening 460 is connected to the first opening 450; when the end of the cross bar 310 is located in the first opening 450, the bolt passes through the second opening 460 to connect with the end of the cross bar 310 located in the first opening 450. Figure 5As shown, there are two second openings 460, which are also symmetrically arranged. Bolts are installed in the two openings to respectively connect with the two ends of the cross bar 310. Both ends of the cross bar 310 are also provided with threaded holes for connecting with the bolts.

[0043] In an embodiment of the utility model, the cross bar 310 is also equipped with a positioning key, and the inner wall of one of the two first openings 450 is provided with a positioning groove corresponding to the positioning key. The purpose of providing the positioning key is to facilitate positioning. When the positioning key is inserted into the positioning groove of the inner wall of the first opening 450, the top rod 320 is just in a vertical state, and the top rod 320 is located above the cross bar 310; at the same time, when the positioning key is inserted into the positioning groove, the threaded hole at the end of the cross bar 310 is just aligned with the second opening 460, thereby facilitating the installation of the bolts and greatly improving the installation efficiency.

[0044] In the embodiment of the utility model, the side wall of the through hole 110 is provided with a mounting hole 130 connecting the through hole 110 and the outside, and a contact surface 131 is provided in the mounting hole 130; the first limiting structure 200 includes a tightening pin 210 and a first elastic member 220, the tightening pin 210 is passed through the mounting hole 130, and the two ends of the first elastic member 220 are respectively abutted against the tightening pin 210 and the contact surface 131. Figure 4 , Figure 6 As shown, the mounting hole 130 is a stepped hole, including a first aperture section and a second aperture section, and the connection between the first aperture section and the second aperture section forms an abutment surface 131. The inner diameter of the first aperture section is larger than the inner diameter of the second aperture section, and the inner diameter of the second aperture section is only slightly larger than the diameter of the abutment pin 210. The abutment pin 210 can pass through the second aperture section and partially fit into the round handle broach, and the first elastic member 220 is arranged in the first aperture section.

[0045] In an embodiment of the utility model, the first limiting structure 200 further includes a latch 230, which is inserted into one end of the abutting pin 210 located at the first aperture section, and the latch 230 extends in the radial direction of the abutting pin 210, and the latch 230 is detachably connected to the abutting pin 210; the first elastic member 220 is arranged between the latch 230 and the abutting surface 131, and the two ends of the first elastic member 220 are respectively abutted against the latch 230 and the abutting surface 131. The first elastic member 220 is preferably a spring, and the end of the abutting pin 210 facing the round handle broach is designed to fit the shape of the round handle broach. The latch 230 is detachably connected to the abutting pin 210, which can facilitate the replacement of the latch 230 or the abutting pin 210 separately, and the first elastic member 220 is connected to the latch 230, and then the latch 230 is connected to the abutting pin 210, which facilitates the installation of the first limiting structure 200.

[0046] Furthermore, a plurality of first limiting structures 200 are provided, and the plurality of first limiting structures 200 are arranged at intervals around the outer circumference of the first cylinder 100. Figure 3 , Figure 4 As shown, the end of the round-shank broach is provided with an inwardly recessed embedding groove, which is generally an annular groove. The locking pins 210 of multiple first limiting structures 200 are embedded in the embedding groove at the same time, which can effectively improve the limiting effect of the round-shank broach and thus improve the stability of the round-shank broach.

[0047] In the embodiment of the present invention, the inner wall of the second cylinder 400 is provided with an annular groove 410, and the abutting pin 210 can be partially embedded in the annular groove 410; the side walls of the annular groove 410 expand outward. Figure 4 , Figure 6 As shown, when the first elastic member 220 of the first limiting structure 200 is not subjected to external force, the first end of the clamping pin 210 will be partially embedded in the annular groove 410 under the push of the first elastic member 220, so that the second end of the clamping pin 210 is out of contact with the round handle broach; that is, when the annular groove 410 is aligned with the mounting hole 130, the first limiting structure 200 cannot limit the round handle broach, and the second cylinder 400 can be raised and lowered relative to the first cylinder 100. Therefore, when the second cylinder 400 moves to the point where the annular groove 410 is misaligned with the mounting hole 130, since the first end of the clamping pin 210 can no longer be embedded in the annular groove 410, the clamping pin 210 will move toward the round handle broach under the push of the second cylinder 400 and compress the first elastic member 220, so that the second end of the clamping pin 210 is embedded in the embedding groove of the round handle broach. In order to prevent the first elastic member 220 from being deformed or bent when the second cylinder 400 is lifted or lowered relative to the first cylinder 100, it is preferred that the side walls of the annular groove 410 are configured to expand outward.

[0048] In the embodiment of the present invention, the second cylinder 400 is provided with an air hole 420 communicating with the annular groove 410, and the first cylinder 100 is provided with a cover 140, which is disposed around the outer periphery of the air hole 420. Figure 5 , Figure 6 As shown, since an annular cavity is formed between the annular groove 410 and the outer wall of the first cylinder 100, and as the second cylinder 400 rises and falls relative to the first cylinder 100, the volume of the cavity increases or decreases, so it is necessary to set the air hole 420 to balance the air pressure inside the cavity and outside. Figures 1 to 4As shown, the cover 140 is disposed on the top of the first cylinder 100, and the cover 140 is connected to the top of the first cylinder 100 by bolts, and there is a gap between the inner wall of the cover 140 and the outer wall of the second cylinder 400, but the length of the cover 140 extending downward exceeds the height of the air hole 420. The provision of the cover 140 can effectively prevent impurities, dust, etc. from entering between the first cylinder 100 and the second cylinder 400 through the air hole 420, avoiding the wear of the first cylinder 100 and the second cylinder 400, thereby extending the service life of the fixing device of this embodiment.

[0049] In an embodiment of the utility model, the second cylinder 400 has a first position and a second position. When the second cylinder 400 is in the first position, the first limiting structure 200 and the second limiting structure 300 are both disengaged from the round handle broach; when the second cylinder 400 is in the second position, the first limiting structure 200 and the second limiting structure 300 are both pressed against the round handle broach; specifically, when the second cylinder 400 is in the first position, the cross bar 310 contacts the bottom end of the strip hole 120 in the length direction, so the top bar 320 does not contact the round handle broach; when the second cylinder 400 is in the first position, the annular groove 410 of the second cylinder 400 is also aligned with the mounting hole 130 of the first cylinder 100, so that the pressing pin 210 does not contact the round handle broach. Therefore, when the second cylinder 400 is in the first position, the first limiting structure 200 and the second limiting structure 300 do not contact the round handle broach, thereby facilitating the taking and placing of the round handle broach.

[0050] Furthermore, when the second cylinder 400 is in the second position, the cross bar 310 contacts the top end of the strip hole 120 in the length direction, and the push rod 320 abuts against the end of the round-handled broach; at the same time, when the second cylinder 400 is in the second position, the annular groove 410 of the second cylinder 400 is misaligned with the mounting hole 130 of the first cylinder 100, that is, the clamping pin 210 cannot be embedded in the annular groove 410, so the first end of the clamping pin 210 will be embedded in the embedding groove of the round-handled broach, so that the clamping pin 210 cooperates with the push rod 320 to achieve the clamping of the round-handled broach.

[0051] In the embodiment of the present utility model, the second cylinder 400 is connected to a driving assembly, and the driving assembly is used to drive the second cylinder 400 to switch between the first position and the second position. Figure 2 , Figure 3 As shown, the second cylinder 400 is connected with a card plate 430, and the driving member is connected to the card plate 430; the card plate 430 extends in the radial direction of the second cylinder 400, and the driving member can be a motor, a telescopic gas, a telescopic oil cylinder and other structures, and the driving member is used to drive the card plate 430 to rise and fall, thereby driving the second cylinder 400 to rise and fall. The card plate 430 can be detachably connected or fixedly connected to the second cylinder 400, and the specific structure can be selected according to actual conditions.

[0052] In the embodiment of the present invention, the first cylinder 100 includes a base 150, and the second cylinder 400 includes a sleeve 440; and further includes a second elastic member 160, which is sleeved on the outer periphery of the first cylinder 100, and the two ends of the second elastic member 160 are respectively against the base 150 and the sleeve 440. Figures 2 to 4 As shown, the second cylinder 400 also includes a main structure, and the annular groove 410, the air hole 420, the clamping plate 430, etc. are all arranged on the main structure, and the sleeve 440 is detachably connected to the main structure, specifically, connected by bolts.

[0053] Furthermore, the second elastic member 160 is preferably a spring, and the second elastic member 160 can provide a force to push the second cylinder 400 upward, but the force to push the second cylinder 400 upward is mainly achieved by the driving member, and the second elastic member 160 mainly plays an auxiliary role; by providing the second elastic member 160, it can be ensured that when the driving member does not operate or the driving member suddenly loses power, the round-handled broach can still remain clamped under the action of the second elastic member 160.

[0054] In the embodiment of the utility model, a clamping strip 170 is installed on the top of the first cylinder 100, and the clamping strip 170 is connected to the first cylinder 100 by a fastener; the clamping strip 170 is used to limit the circumferential rotation of the round handle broach. Figure 1 , Figure 2 As shown, the outer peripheral wall of the round handle broach is provided with a cutting surface, and the clamping strip 170 contacts the first cutting surface, thereby effectively limiting the circumferential rotation of the round handle broach. The clamping strip 170 is connected to the first cylinder 100 by a fastener, and the fastener can be a bolt or other structure.

[0055] According to the round-handled broach fixing device of the embodiment of the utility model, the round-handled broach is limited by providing a first limiting structure 200 and a second limiting structure 300, thereby effectively increasing the contact points with the round-handled broach, thereby increasing the stability of the round-handled broach; the first limiting structure 200 and the second limiting structure 300 are driven to act synchronously by the second cylinder 400, thereby reducing the number of structures and lowering the production cost; the round-handled broach can be clamped and disengaged by switching the second cylinder 400 between the first position and the second position, with simple steps and convenient operation.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0057] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A round handle broach fixing device, characterized in that: include: The first cylinder is provided with a through hole axially penetrating the first cylinder and a strip hole radially penetrating the first cylinder, the through hole is communicated with the strip hole; the through hole is used for inserting a round handle broach, and a first limiting structure for limiting the round handle broach is installed on the side wall of the through hole; A second limiting structure is provided through the strip-shaped hole and can slide along the length direction of the strip-shaped hole; A second cylinder, sleeved on the first cylinder and connected to the second limiting structure, the second cylinder being lifted relative to the first cylinder to drive the second limiting structure to slide along the strip-shaped hole; Wherein, the second cylinder has a first position and a second position. When the second cylinder is in the first position, the first limiting structure and the second limiting structure are both disengaged from the round handle broach. When the second cylinder is in the second position, the first limiting structure and the second limiting structure are both pressed against the round handle broach. The second cylinder is connected to a driving member, and the driving member is used to drive the second cylinder to switch between the first position and the second position.

2. The round handle broach fixing device according to claim 1, characterized in that: The second limiting structure includes a cross bar and a top bar, the cross bar is passed through the strip hole and can slide along the strip hole; the top bar is connected to the middle part of the cross bar, and the top bar is arranged in the through hole; the cross bar slides along the length direction of the strip hole to drive the top bar to rise and fall along the through hole.

3. The round handle broach fixing device according to claim 2, characterized in that: Both ends of the cross bar are passed through the second cylinder, and the cross bar is connected to the second cylinder via a fastener.

4. The round handle broach fixing device according to claim 1, characterized in that: There are multiple first limiting structures, and the multiple first limiting structures are arranged at intervals around the outer circumference of the first cylinder.

5. The round handle broach fixing device according to claim 1, characterized in that: The side wall of the through hole is provided with a mounting hole connecting the through hole and the outside, and a contact surface is provided in the mounting hole; the first limiting structure includes a clamping pin and a first elastic member, the clamping pin is passed through the mounting hole, and the two ends of the first elastic member are respectively abutted against the clamping pin and the abutting surface.

6. The round handle broach fixing device according to claim 5, characterized in that: The inner side wall of the second cylinder is provided with an annular groove, and the abutting pin can be partially embedded in the annular groove; the side walls of the annular groove expand outwards.

7. The round handle broach fixing device according to claim 6, characterized in that: The second cylinder is provided with an air hole communicated with the annular groove, and the first cylinder is provided with a cover shell, which is arranged on the outer periphery of the air hole.

8. The round handle broach fixing device according to claim 1, characterized in that: The second cylinder is connected with a clamping plate, and the driving member is connected with the clamping plate.

9. The round handle broach fixing device according to claim 1, characterized in that: The first cylinder includes a base, and the second cylinder includes a sleeve; the second cylinder also includes a second elastic member, which is sleeved on the outer circumference of the first cylinder, and the two ends of the second elastic member are respectively against the base and the sleeve.

10. The round handle broach fixing device according to claim 1, characterized in that: A clamping strip is installed on the top of the first cylinder, and the clamping strip is connected to the first cylinder via a fastener; the clamping strip is used to limit the circumferential rotation of the round-shank broach.

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