Sliding body brake and linear motor catapult

Abstract

The present invention relates to the field of slide brake technology, and more specifically, to a slide brake and a linear motor ejector. The slide brake comprises a slider having insertion portions on its left and right sides, a mounting hole within the slider, an opening on at least one end face of the insertion portion, a top block, an elastic member, and a friction block within the mounting hole, the end face of the friction block being exposed outside the insertion portion for frictional contact with the wall of a slide guide rail groove; an adjusting screw is threadedly connected to the slider, and the end of the adjusting screw and the top block are engaged by a push-fit structure, so that when the adjusting screw is screwed into the slider, the top block is pushed outward, thereby compressing the elastic member to elastically press the end face of the friction block against the wall of the slide guide rail groove. The slide brake of the present invention is flexible to install, regardless of up and down or left and right. The insertion portions on both sides can be aligned with the guide rail groove and inserted, making installation convenient. At the same time, by simply adjusting the screw-in amount of the adjusting screw, the braking force can be steplessly adjusted within a certain range, thus achieving strong adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of slide brakes, and in particular to a slide brake and a linear motor catapult. Background Art

[0002] Electromagnetic catapults (EMCs) are a new type of launcher that have been used in recent years to launch aerospace equipment such as rockets, drones, and carrier-based aircraft. The core component of an EMC is a linear motor, which typically consists of a primary (stator), a secondary (motor), a primary mounting frame, a secondary pulley, and a pulley guide. Using a linear motor as an EMC requires deceleration and braking of the high-speed secondary pulley after the target reaches a set speed.

[0003] In this regard, Chinese invention patent application publication number CN113371220A discloses a pulley friction brake linear motor catapult, comprising a primary coil module, a secondary thrust magnet module, a frame, a pulley (i.e., a slider), upper and lower guide rails, and a friction brake assembly. The C-shaped rail grooves (i.e., the slider guide rail grooves) of the two upper guide rails open toward each other. The pulley's upper and lower sides are restrained by rollers on the upper and lower pairs of guide rails, sliding forward and backward along the longitudinal direction of the motor under the action of electromagnetic force. The friction brake assembly includes a base plate and multiple deceleration modules, each of which includes a friction block, two pins, two disc spring assemblies, and two shim assemblies. When the pulley slides at high speed above the deceleration module, the friction block is pressed down, causing the lower surface of the pulley to contact the upper surface of the friction block. The disc spring assembly is compressed by the friction block and deformed, and the majority of its spring force is converted into a positive pressure between the upper surface of the friction block and the lower surface of the pulley, and then into a sliding friction force between the two, thereby braking the moving pulley. Starting from the time the pulley runs to the top of the first deceleration module, the number of friction blocks pressed by it accumulates to a fixed value and remains unchanged until its speed is reduced to zero.

[0004] While the aforementioned friction brake assembly can provide a gradually increasing frictional braking force to the pulley, resulting in a relatively smooth braking process, the base plate and friction block are mounted on the lower side of the assembly, making adjustment difficult once installed. Furthermore, the sizing, machining, and assembly precision of each component are very high. A slight mistake could prevent the pulley from pressing down the friction block, which in turn could become an obstruction to the pulley's passage. Alternatively, the head of the spike could expose the friction block, also hindering the pulley's passage. Consequently, this structural design increases the difficulty of manufacturing, installation, and adjustment, making it very inconvenient to use. Summary of the Invention

[0005] The object of the present invention is to provide a sliding body brake that is easy to install and adjust; the object of the present invention is also to provide a linear motor catapult using the above sliding body brake.

[0006] To achieve the above objectives, the slider brake of the present invention adopts the following technical solutions:

[0007] A sliding brake comprises a slider, wherein the left and right sides of the slider are respectively provided with insertion parts for inserting into the slider guide rail groove, and mounting holes are provided in the slider along the left and right directions, and the mounting hole has an opening on the end face of at least one insertion part, and a top block, an elastic part and a friction block are sequentially installed in the mounting hole from the inside to the outside, and the end face of the friction block is used to be exposed to the outside of the corresponding insertion part so as to frictionally contact with the groove wall of the slider guide rail groove; an adjusting screw is threadedly connected to the slider, and the end face of the adjusting screw extends into the mounting hole, and the end face of the adjusting screw and the top block are matched by a push-fitting structure, so that when the adjusting screw is screwed into the slider, the top block is pushed to move outward, and then the end face of the friction block is elastically pressed against the groove wall of the slider guide rail groove by compressing the elastic part.

[0008] The beneficial effects of the above technical solution are: an insertion portion for inserting into the slide guide groove is provided on the slider, and during installation, the insertion portion is inserted into the slide guide groove to realize the installation of the slider, which is relatively convenient; a mounting hole is provided in the slider, which facilitates the sliding installation of the friction block and the top block, facilitates the sliding of the friction block and the top block, and the end face of the friction block is used to be exposed outside the insertion portion so as to frictionally contact with the groove wall of the slide guide groove, thereby providing friction force to brake the slider; an elastic member is provided between the friction block and the top block, and an adjusting screw is threadedly connected to the slider, and the end face of the adjusting screw extends into the mounting hole, and the end face of the adjusting screw and the top block are matched by a push-fitting structure, so that when the adjusting screw is screwed into the slider, the top block can be pushed outward and then the end face of the friction block is elastically pressed against the groove wall of the slide guide groove by compressing the elastic member, that is, by rotating the adjusting screw, the top pressure between the end face of the friction block and the groove wall of the guide groove can be changed, thereby changing the friction force, and the adjustment is very convenient, and stepless adjustment can be achieved.

[0009] Furthermore, the center line of the adjusting screw intersects the center line of the mounting hole perpendicularly.

[0010] The beneficial effects of the above technical solution are: better force effect, and it is convenient to adjust the screw to push the top block to move.

[0011] Furthermore, the push-fit structure includes a frustum provided at the end of the ejector block and a conical chamfer provided at the end of the adjusting screw, and the sum of the half-cone angles of the frustum and the conical chamfer is 90°.

[0012] The beneficial effects of the above technical solution are: using a frustum and a conical chamfer as a push-fitting structure has a simple structure and is easy to manufacture, and the sum of the semi-cone angles of the frustum and the conical chamfer is 90°, which has a good fitting effect.

[0013] Furthermore, an adjustment pad is provided in the mounting hole between the elastic member and the friction block or between the elastic member and the top block, and the adjustment pad and the mounting hole are clearance-fitted with the shaft hole.

[0014] The beneficial effect of the above technical solution is that by processing adjustment pads of different thicknesses, several adjustment pads can be used in combination, the preload force can be adjusted more flexibly, and the preload force loss caused by friction block wear can be compensated.

[0015] Furthermore, there are two adjusting screws, which are symmetrically threadedly connected to the upper and lower parts of the sliding block.

[0016] The beneficial effect of the above technical solution is that the slider can be installed in the same position, making installation more convenient.

[0017] Furthermore, the insert portion, friction block, top block and elastic member are respectively provided in two sets symmetrically on the left and right sides, the mounting hole passes through the slider in the left and right directions, and the adjusting screw uses the push-fit structure to push the left and right top blocks at the same time.

[0018] The beneficial effect of the above technical solution is that the slider can be installed without distinction between left and right, and the adjusting screw pushes both left and right push blocks simultaneously, so that the left and right friction blocks can be compressed simultaneously, obtaining double friction and improving the braking effect. At the same time, the reaction force exerted on the adjusting screw by the push blocks on both sides along the mounting hole direction can be balanced and offset, so that the force on the adjusting screw is more reasonable.

[0019] Furthermore, a buffer pad is fixed on the end surface of the slider facing the sliding body.

[0020] The beneficial effect of the above technical solution is that when the sliding body collides with the sliding block, flexible buffering can be performed to avoid a large impact at the moment of rigid body collision.

[0021] Furthermore, a buffer pad is also fixed on the end surface of the slider that is used to face away from the sliding body.

[0022] The beneficial effect of the above technical solution is that more sliders can be provided to gradually increase the friction braking force, and when two adjacent sliders collide, the collision can be buffered by the buffer pad.

[0023] Furthermore, an installation pool for installing a buffer pad is provided on the end surface of the slider that faces the sliding body and the end surface that faces away from the sliding body.

[0024] The beneficial effect of the above technical solution is that it facilitates the installation of the buffer pad.

[0025] To achieve the above objectives, the linear motor catapult of the present invention adopts the following technical solutions:

[0026] The cam is secured to the upper edge of the sliding member and secured to the lower edge of the sliding member so that the cam can slide relative to the sliding member when the cam is engaged.

[0027] The beneficial effect of the above technical solution is that: the slider is provided with an insertion portion that is inserted into the slider guide groove. During installation, the insertion portion is inserted into the slider guide groove to realize the installation of the slider. The installation is relatively convenient and there is no need to change the structure of the linear motor; a mounting hole is provided in the slider, which facilitates the sliding installation of the friction block and the top block, facilitates the sliding of the friction block and the top block, and the end face of the friction block is exposed outside the insertion portion to frictionally contact with the groove wall of the slider guide groove, thereby providing friction to brake the slider; an elastic member is provided between the friction block and the top block, and an adjusting screw is threadedly connected to the slider, the end of the adjusting screw extends into the mounting hole, and the end of the adjusting screw and the top block are matched by a push-fit structure. In this way, when the adjusting screw is screwed into the slider, the top block can be pushed outward and then the end face of the friction block is elastically pressed against the groove wall of the slider guide groove by compressing the elastic member. That is, by rotating the adjusting screw, the top pressure between the end face of the friction block and the groove wall of the guide groove can be changed, thereby changing the friction force. The adjustment is very convenient and stepless adjustment can be achieved. At the same time, through the modular combination of multiple sliding brakes, the friction braking force can be gradually increased to achieve better braking effect.

[0028] Furthermore, the center line of the adjusting screw intersects the center line of the mounting hole perpendicularly.

[0029] The beneficial effects of the above technical solution are: better force effect, and it is convenient to adjust the screw to push the top block to move.

[0030] Furthermore, the push-fit structure includes a frustum provided at the end of the ejector block and a conical chamfer provided at the end of the adjusting screw, and the sum of the half-cone angles of the frustum and the conical chamfer is 90°.

[0031] The beneficial effects of the above technical solution are: using a frustum and a conical chamfer as a push-fitting structure has a simple structure and is easy to manufacture, and the sum of the semi-cone angles of the frustum and the conical chamfer is 90°, which has a good fitting effect.

[0032] Furthermore, an adjustment pad is provided in the mounting hole between the elastic member and the friction block or between the elastic member and the top block, and the adjustment pad and the mounting hole are clearance-fitted with the shaft hole.

[0033] The beneficial effect of the above technical solution is that by processing adjustment pads of different thicknesses, several adjustment pads can be used in combination, the preload force can be adjusted more flexibly, and the preload force loss caused by friction block wear can be compensated.

[0034] Furthermore, there are two adjusting screws, which are symmetrically threadedly connected to the upper and lower parts of the sliding block.

[0035] The beneficial effect of the above technical solution is that the slider can be installed in the same position, making installation more convenient.

[0036] Furthermore, the insert portion, friction block, top block and elastic member are respectively provided in two sets symmetrically on the left and right sides, the mounting hole passes through the slider in the left and right directions, and the adjusting screw uses the push-fit structure to push the left and right top blocks at the same time.

[0037] The beneficial effect of the above technical solution is that the slider can be installed without distinction between left and right, and the adjusting screw pushes both left and right push blocks simultaneously, so that the left and right friction blocks can be compressed simultaneously, obtaining double friction and improving the braking effect. At the same time, the reaction force exerted on the adjusting screw by the push blocks on both sides along the mounting hole direction can be balanced and offset, so that the force on the adjusting screw is more reasonable.

[0038] Furthermore, a buffer pad is fixed on the end surface of the slider facing the sliding body.

[0039] The beneficial effect of the above technical solution is that when the sliding body collides with the sliding block, flexible buffering can be performed to avoid a large impact at the moment of rigid body collision.

[0040] Furthermore, a buffer pad is also fixed on the end surface of the slider that is used to face away from the sliding body.

[0041] The beneficial effect of the above technical solution is that more sliders can be provided to gradually increase the friction braking force, and when two adjacent sliders collide, the collision can be buffered by the buffer pad.

[0042] Furthermore, an installation pool for installing a buffer pad is provided on the end surface of the slider that faces the sliding body and the end surface that faces away from the sliding body.

[0043] The beneficial effect of the above technical solution is that it facilitates the installation of the buffer pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A perspective view of the slider brake embodiment 1 of the present invention in use;

[0045] Figure 2 This is a cross-sectional view of the slider brake embodiment 1 of the present invention in use;

[0046] Figure 3 A perspective view of a sliding body brake embodiment 1 of the present invention;

[0047] Figure 4 1 is a cross-sectional view of a first embodiment of a slider brake according to the present invention (the cross-sectional view shows the adjusting screw and the buffer pad);

[0048] Figure 5 A cross-sectional view of Example 1 of the slider brake of the present invention (cross-sectional view showing the adjusting screw, friction block and top block);

[0049] Figure 6 It is a partial three-dimensional cross-sectional view of the sliding body brake embodiment 1 of the present invention.

[0050] In the figure: 1. ejection frame; 2. ejection frame side wall; 3. upper guide rail; 31. guide rail groove; 4. secondary pulley; 5. slide brake; 51. slider; 52. insert; 53. friction block; 54. top block; 541. round table; 55. disc spring; 56. adjustment pad; 57. adjustment screw; 58. buffer pad; 59. mounting hole; 510. threaded hole; 511. mounting pool. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0053] It should be noted that relational terms such as "first" and "second" that may appear are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by a sentence such as "including a..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0054] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0055] The embodiment 1 of the slider brake of the present invention is as follows Figure 1 and Figure 2 As shown, the slider brake 5 in this embodiment is applied to a linear motor catapult. This linear motor catapult is conventional and includes a catapult frame 1 and upper guide rails 3 mounted on top of two catapult frame side walls 2. The two upper guide rails 3 each have a C-shaped guide rail groove 31, with the openings of the left and right guide rail grooves 31 arranged opposite each other. The secondary pulley 4 is restrained on the two upper guide rails 3 by rollers that cooperate with the guide rail grooves 31 and can slide in the front-to-back direction. Therefore, the secondary pulley 4 constitutes the slider, the upper guide rails 3 constitute the pulley guide rail, and the guide rail grooves 31 constitute the slider guide groove. The slider brake 5 is slidably mounted between the left and right guide rail grooves 31, and multiple slider brakes 5 are arranged in the front-to-back direction to achieve braking of the secondary pulley 4.

[0056] Combine Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the slider brake 5 includes a slider 51. Insertion portions 52 for insertion into the guide rail groove 31 are provided on the left and right sides of the slider 51, respectively. This results in the slider 51 having a cross-shaped front surface and is symmetrical left and right and top and bottom. The insertion portions 52 on each side act as sliding feet. A mounting hole 59 is provided in the slider 51, extending through the slider 51 in the left-right direction. Therefore, the mounting hole 59 has openings on the end faces of both the left and right insertion portions 52. The mounting hole 59 is a cylindrical, smooth hole. A threaded hole 510 is provided in the center of the top and bottom surfaces of the slider 51, respectively. The two threaded holes 510 are symmetrical and communicate with the mounting hole 59. The center lines of the threaded holes 510 intersect perpendicularly with the center lines of the mounting hole 59.

[0057] Mounting hole 59 is sequentially installed with a top block 54, an elastic member, an adjustment pad 56, and a friction block 53, from the inside out. Two sets of friction blocks 53, top block 54, adjustment pad 56, and elastic member are symmetrically arranged. Specifically, friction blocks 53 are cylindrical and made of friction material. They are inserted into both ends of mounting hole 59 with a clearance fit between the shaft and the hole. The end faces of friction blocks 53 are exposed outside of the insertion portion 52 to frictionally contact the walls of the guide rail slot 31. A set of adjustment pads 56 consists of multiple members (three in this embodiment). Two sets of adjustment pads 56 are inserted into mounting hole 59 with a clearance fit between the shaft and the hole, and are located inside the friction blocks 53. The elastic member is composed of a plurality of disc springs 55 stacked together. In this embodiment, four disc springs 55 form a set. Two sets of disc springs 55 are inserted into mounting hole 59 with a clearance fit between the shaft and the hole, and are located inside the adjustment pads 56. The top block 54 includes a cylindrical section and a cone 541 arranged at the end of the cylindrical section. The cone 541 has a cone angle of 90°. The two top blocks 54 are respectively embedded in the mounting hole 59 in a manner of axial hole clearance fit, and are located between the axis of the threaded hole 510 and the disc spring 55 on the same side. The cones 541 of the left and right top blocks 54 are arranged facing each other, that is, both face the symmetrical mid-plane where the axis of the threaded hole 510 is located.

[0058] An adjusting screw 57 is threadedly connected to the upper and lower threaded holes 510 respectively. The end of the adjusting screw 57 extends into the mounting hole 59, and its center line intersects vertically with the center line of the mounting hole 59. The end of the adjusting screw 57 is provided with a conical chamfer, and the cone angle of the conical chamfer is 90°, so that the sum of the semi-cone angles of the cone 541 and the conical chamfer is 90°. The conical chamfer and the frustum 541 constitute a push-fitting structure between the adjusting screw 57 and the top block 54, so that when the adjusting screw 57 is screwed into the slider 51, the top block 54 can be pushed to move outward, and the friction block 53 can be pushed outward through the disc spring group. When the friction block 53 presses against the groove wall of the guide rail groove 31, the adjusting screw 57 continues to be screwed in, and the top block 54 continues to move outward, and the compression disc spring 55 is deformed to generate elastic force, which is converted into a pushing pressure between the end face of the friction block 53 and the groove wall of the guide rail groove 31 through the friction block 53. When the sliding brake is pushed by the sliding body, the pushing pressure is converted into sliding friction force, thereby braking the sliding body.

[0059] Since the top pressure and sliding friction are changed by rotating the adjustment screw 57, adjustment is very convenient and can be achieved steplessly. At the same time, by processing adjustment pads 56 of different thicknesses and combining several adjustment pads 56, the preload force can be adjusted more flexibly and the preload force loss caused by wear of the friction block 53 can be compensated.

[0060] In addition, a rubber cushion 58 is fixed to both the end surface of the slider 51 facing the secondary pulley 4 and the end surface facing away from the secondary pulley 4. To facilitate mounting, mounting recesses 511 for the cushion 58 are provided on both the end surface of the slider 51 facing the secondary pulley 4 and the end surface facing away from the secondary pulley 4 (i.e., the front and rear end surfaces). The cushion 58 is adhesively fixed within the mounting recesses 511, with its outer surface protruding a certain height above the front and rear end surfaces of the slider 51.

[0061] When the slider brake of the present invention is used, Figure 1 and Figure 2 As shown, the slider brake 5 is placed between the two upper guide rails 3 of the linear motor ejector. The insertion portions 52 on either side of the slider 51 extend into the guide rail groove 31, forming a clearance fit with the guide rail groove 31. A relatively larger clearance exists between the side elevations of the insertion portions 52 and the side elevations of the guide rail groove 31. Before the motor is ejected, the two adjustment screws 57 are first loosened, the slider 51 is slid along the guide rail groove 31 to a set position, and then the upper adjustment screw 57 is tightened downward to create a compressive state between the outer end surfaces of the friction blocks 53 on both sides and the side elevations of the guide rail groove 31. By varying the screw-in depth of the adjustment screws 57, the compressive force between the outer end surfaces of the friction blocks 53 and the side elevations of the guide rail groove 31 can be continuously adjusted within a certain range. When the motor is ejected, after the secondary pulley 4 hits the buffer pad 58 on the end face of the slider 51, the slider 51 slides forward under the drive of the secondary pulley 4, and the friction force between the friction block 53 and the side surface of the guide rail groove 31 reacts to the secondary pulley 4 through the slider 51, providing braking force for the secondary pulley 4.

[0062] The slider brake 5 of the present invention utilizes an independent modular structure, eliminating the need for modification of the original linear motor body. It can be used in modular combinations. By varying the number of modules, the initial positions of each module (including their absolute positions on the upper guide rail 3 and their distances from each other), and the extrusion force settings of each module, various braking combinations with different deceleration characteristics can be formed to meet diverse operating conditions. When used in combination, the first module closest to the secondary pulley 4 is initially braked upon being struck by the secondary pulley 4. When it collides with the second module immediately adjacent to it during sliding, the second module joins the braking queue, and so on, until all modules in the combination participate in the braking task of the secondary pulley 4. During this process, the braking resistance accumulates sequentially until it reaches a maximum, resulting in a smoother braking process.

[0063] The slider brake 5 of the present invention offers flexible installation options and can be flipped left or right, or up or down, without affecting the braking effect. During installation, the insert portions 52 on both sides can be simply aligned with the guide rail slots 31 and inserted, making installation convenient. Furthermore, the operating end of the adjustment screw 57 is exposed upward, making rotational operation convenient. Movement, positioning, and extrusion force setting can be achieved by simply adjusting the screw insertion amount. The braking force can be actively and continuously adjusted within a certain range, providing strong adaptability.

[0064] In other embodiments of the slider brake: the slider brake is not only suitable for braking the pulley in the linear motor electromagnetic catapult, but also for all catapult devices with a slider sliding along a guide rail to perform work. The present invention can be generally applied to the deceleration braking of the slider therein through direct transplantation, adaptive improvement, or in-depth innovation based on the existing scheme.

[0065] In other embodiments of the slider brake, the disc springs may be combined in an apposition or a combination of apposition and superposition, or the elastic member may be a disc spring, or a coil spring.

[0066] In other embodiments of the slider brake, the cone angles of the frustum and the conical chamfer may be unequal, but the sum of their half cone angles is 90°.

[0067] In other embodiments of the slider brake, the push-fit structure may also be a structure in which an inclined surface or a spherical surface is provided at the end of the push block, and a spherical surface is provided at the end of the adjusting screw.

[0068] In other embodiments of the sliding brake: the push-fitting structure can also be a wedge block additionally arranged between the adjusting screw and the top block. The wedge block and the top block can be matched through an inclined surface. When the adjusting screw is screwed into the sliding block, the wedge block is pushed to move downward, and then the wedge block pushes the top block to move outward.

[0069] In other embodiments of the sliding brake: the push-fitting structure can also be two connecting rods, one end of the two connecting rods is hinged to each other, and the other end of the two connecting rods is hinged to the left and right top blocks respectively, the hinge axis between the two connecting rods and the hinge axis between the connecting rods and the top blocks both extend in the front-to-back direction, and the two connecting rods are arranged in an inverted V shape. When the adjusting screw is screwed into the slider, the end of the adjusting screw pushes the hinged ends of the two connecting rods to move downward, and then the two connecting rods push the two top blocks to move outward from the slider respectively.

[0070] In other embodiments of the slider brake, the end surface of the slider facing the slider and the end surface facing away from the slider may not be provided with a mounting pool, and the end surface is a plane. In this case, the buffer pad is directly fixed on the end surface.

[0071] In other embodiments of the slider brake: when there is only one slider brake, the buffer pad may not be fixed on the end surface of the slider facing away from the slider.

[0072] In other embodiments of the slider brake, a buffer pad may not be provided on the end surface of the slider facing the slider, and the end surface of the slider directly collides with the slider during braking.

[0073] In other embodiments of the sliding brake: the friction block, top block, adjustment pad and elastic member can be provided in only one set. In this case, two insertion parts can still be provided to be inserted into the sliding guide grooves on both sides respectively, but the end face of the friction block is only exposed to the outside of one side of the insertion part to make frictional contact with the groove wall of the sliding guide groove on the same side. In this case, the mounting hole has an opening only on the end face of one insertion part.

[0074] In other embodiments of the slider brake, there is only one adjusting screw, which needs to be directed upward during installation to facilitate the top pressure adjustment operation.

[0075] In other embodiments of the slider brake, the number of the adjustment pads can be adjusted according to actual needs.

[0076] In other embodiments of the slider brake, the adjustment pad may also be provided between the elastic member and the top block, or of course, the adjustment pad may not be provided.

[0077] In other embodiments of the slider brake, the center line of the adjusting screw and the center line of the mounting hole do not intersect perpendicularly, but do not intersect and are in a non-intersecting perpendicular state, or intersect but at an acute or obtuse angle.

[0078] The embodiment of the linear motor catapult in the present invention is as follows: the linear motor catapult is the same as the linear motor catapult used in the above-mentioned slider brake embodiment 1, and will not be repeated here.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A slider brake, characterized in that: The invention comprises a slider (51), wherein the left and right sides of the slider (51) are respectively provided with an insertion portion (52) for inserting into the slide guide rail groove (31), and the slider (51) is provided with a mounting hole (59) along the left and right directions. The mounting hole (59) has an opening on the end face of at least one insertion portion (52). A top block (54), an elastic member and a friction block (53) are sequentially installed in the mounting hole (59) from the inside to the outside. The end face of the friction block (53) is used to be exposed outside the corresponding insertion portion (52) to contact with the slide. The guide rail groove (31) is in frictional contact with the groove wall; the slider (51) is threadedly connected with an adjusting screw (57), the end of the adjusting screw (57) extends into the mounting hole (59), and the end of the adjusting screw (57) and the top block (54) are matched through a push-fit structure, so that when the adjusting screw (57) is screwed into the slider (51), the top block (54) is pushed outward, and the end face of the friction block (53) is elastically pressed against the groove wall of the slide guide rail groove (31) by compressing the elastic member.

2. The slider brake according to claim 1, characterized in that: The center line of the adjusting screw (57) intersects the center line of the mounting hole (59) perpendicularly.

3. The slider brake according to claim 2, characterized in that: The push-fit structure comprises a frustum (541) arranged at the end of the top block (54) and a conical chamfer arranged at the end of the adjusting screw (57), and the sum of the semi-cone angles of the frustum (541) and the conical chamfer is 90°.

4. The slider brake according to any one of claims 1 to 3, characterized in that: An adjustment pad (56) is provided in the mounting hole (59) between the elastic member and the friction block (53) or between the elastic member and the top block (54), and the adjustment pad (56) and the mounting hole (59) are in shaft-hole clearance fit.

5. The slider brake according to any one of claims 1 to 3, characterized in that: There are two adjusting screws (57), which are symmetrically connected to the upper and lower parts of the slider (51) through threads.

6. The slider brake according to any one of claims 1 to 3, characterized in that: The inserting portion (52), the friction block (53), the top block (54) and the elastic member are respectively provided in two sets symmetrically on the left and right sides. The mounting hole (59) passes through the slider (51) in the left and right directions. The adjusting screw (57) uses the push-fitting structure to push the two top blocks (54) on the left and right sides at the same time.

7. The slider brake according to any one of claims 1 to 3, characterized in that: A buffer pad (58) is fixed on the end surface of the slider (51) facing the sliding body.

8. The slider brake according to claim 7, characterized in that: A buffer pad (58) is also fixed on the end surface of the slider (51) that faces away from the sliding body.

9. The slider brake according to claim 8, characterized in that: The end surface of the slider (51) facing the sliding body and the end surface facing away from the sliding body are both provided with mounting pools (511) for mounting a buffer pad (58).

10. A linear motor catapult comprising a pulley guide rail and a secondary pulley mounted on the pulley guide rail, wherein the secondary pulley constitutes a slide body, and the guide rail groove of the pulley guide rail constitutes a slide body guide rail groove, characterized in that: The linear motor catapult further comprises a slider brake as claimed in any one of claims 1 to 9.

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